:root {
  color-scheme: light;
  --canvas: #f2f8fd;
  --canvas-deep: #e5f3fd;
  --surface: #ffffff;
  --surface-raised: #ffffff;
  --surface-soft: #f5f9fd;
  --surface-tint: #eaf4ff;
  --text: #183450;
  --text-strong: #102c49;
  --muted: #6b8098;
  --muted-strong: #516b87;
  --line: #d8e5ef;
  --line-strong: #bdd3e5;
  --primary: #347ce8;
  --primary-strong: #236bd3;
  --primary-soft: #e8f3ff;
  --secondary: #7b61e8;
  --mint: #42bf91;
  --success: #15946c;
  --success-soft: #e6f7f0;
  --warning: #a86c0b;
  --warning-soft: #fff4dc;
  --danger: #c84454;
  --danger-soft: #fff0f2;
  --coach-bg: linear-gradient(180deg, #367fe9 0%, #4a92ef 56%, #6ab7ed 100%);
  --coach-card: #ffffff;
  --coach-line: rgba(255, 255, 255, .32);
  --shadow-sm: 0 8px 24px rgba(45, 91, 136, .08);
  --shadow: 0 20px 52px rgba(43, 88, 132, .13);
  --radius-sm: 12px;
  --radius: 20px;
  --radius-lg: 28px;
  --topbar: 72px;
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --canvas: #06101f;
  --canvas-deep: #020813;
  --surface: #0a192d;
  --surface-raised: #0d2039;
  --surface-soft: #0d1e35;
  --surface-tint: #102846;
  --text: #eaf4ff;
  --text-strong: #f5f9ff;
  --muted: #9db1c9;
  --muted-strong: #bdcee0;
  --line: rgba(141, 175, 216, .17);
  --line-strong: rgba(149, 184, 228, .3);
  --primary: #5a98ff;
  --primary-strong: #78aaff;
  --primary-soft: #102a4d;
  --secondary: #9a82ff;
  --mint: #42d5a1;
  --success: #53d8a9;
  --success-soft: rgba(37, 186, 132, .12);
  --warning: #f1ba5d;
  --warning-soft: rgba(222, 155, 47, .12);
  --danger: #ff8492;
  --danger-soft: rgba(222, 74, 94, .12);
  --coach-bg: linear-gradient(180deg, #0e2241 0%, #123158 58%, #183e66 100%);
  --coach-card: #0b1b32;
  --coach-line: rgba(168, 197, 235, .17);
  --shadow-sm: 0 8px 24px rgba(0, 0, 0, .18);
  --shadow: 0 20px 52px rgba(0, 0, 0, .32);
}

* {
  box-sizing: border-box;
}

/* Hide scrollbar chrome throughout the student UI; wheel, touch and keyboard scrolling remain available. */
html, body, * {
  scrollbar-width: none !important;
  -ms-overflow-style: none !important;
}
*::-webkit-scrollbar {
  display: none !important;
  width: 0 !important;
  height: 0 !important;
}

html {
  min-width: 320px;
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  margin: 0;
  color: var(--text);
  background:
    radial-gradient(circle at 11% 0, color-mix(in srgb, var(--primary) 13%, transparent), transparent 30rem),
    radial-gradient(circle at 90% 8%, color-mix(in srgb, var(--mint) 8%, transparent), transparent 22rem),
    var(--canvas);
  font-family: Inter, Pretendard, "Noto Sans KR", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

button,
input,
textarea,
select {
  color: inherit;
  font: inherit;
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

button:not(:disabled),
[role="button"]:not([aria-disabled="true"]) {
  cursor: pointer;
}

button:disabled,
[aria-disabled="true"] {
  cursor: not-allowed;
  opacity: .55;
}

a {
  color: inherit;
  text-decoration: none;
}

img {
  max-width: 100%;
}

[hidden] {
  display: none !important;
}

.sr-only {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}

:focus-visible {
  outline: 3px solid color-mix(in srgb, var(--primary) 55%, transparent);
  outline-offset: 3px;
}

.skip-link {
  position: fixed;
  top: 8px;
  left: 8px;
  z-index: 200;
  padding: 10px 14px;
  border-radius: 10px;
  color: #fff;
  background: #102d4b;
  transform: translateY(-150%);
}

.skip-link:focus {
  transform: none;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  min-width: 0;
  color: var(--text-strong);
  font-size: 20px;
  font-weight: 900;
  letter-spacing: -.03em;
}

.brand > span:last-child {
  min-width: 0;
}

.brand small {
  display: block;
  margin-top: -2px;
  color: var(--muted);
  font-size: 9px;
  font-weight: 750;
  letter-spacing: .12em;
  white-space: nowrap;
}

.brand-mark,
.mini-mark {
  display: grid;
  flex: 0 0 auto;
  place-items: center;
  color: #fff;
  background: linear-gradient(135deg, #54d4a3, #398cf3 72%, #7769ee);
  box-shadow: 0 10px 24px rgba(50, 139, 220, .24);
  font-weight: 950;
}

.brand-mark {
  width: 42px;
  height: 42px;
  border-radius: 14px;
  font-size: 20px;
}

.mini-mark {
  width: 46px;
  height: 46px;
  border-radius: 15px;
  font-size: 21px;
}

.icon-button {
  display: inline-grid;
  width: 42px;
  height: 42px;
  padding: 0;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 13px;
  color: var(--muted-strong);
  background: var(--surface-soft);
  transition: border-color .18s ease, background .18s ease, transform .18s ease;
}

.icon-button:hover {
  border-color: var(--line-strong);
  background: var(--surface-tint);
  transform: translateY(-1px);
}

.button {
  display: inline-flex;
  min-height: 43px;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 16px;
  border: 1px solid transparent;
  border-radius: 12px;
  font-size: 14px;
  font-weight: 800;
  transition: transform .18s ease, box-shadow .18s ease, background .18s ease, border-color .18s ease;
}

.button:not(:disabled):hover {
  transform: translateY(-1px);
}

.button.primary {
  color: #fff;
  background: linear-gradient(135deg, var(--secondary), var(--primary));
  box-shadow: 0 10px 22px color-mix(in srgb, var(--primary) 23%, transparent);
}

.button.secondary {
  border-color: var(--line);
  color: var(--muted-strong);
  background: var(--surface-raised);
}

.button.ghost {
  border-color: transparent;
  color: var(--primary);
  background: var(--primary-soft);
}

.button.danger {
  border-color: color-mix(in srgb, var(--danger) 30%, transparent);
  color: var(--danger);
  background: var(--danger-soft);
}

.button.compact {
  min-height: 36px;
  padding: 7px 11px;
  font-size: 12px;
}

.auth-view {
  min-height: 100vh;
  overflow: hidden;
  background:
    radial-gradient(circle at 14% 17%, color-mix(in srgb, var(--primary) 18%, transparent), transparent 25rem),
    radial-gradient(circle at 82% 80%, color-mix(in srgb, var(--mint) 13%, transparent), transparent 22rem),
    linear-gradient(145deg, var(--canvas-deep), var(--canvas) 56%, color-mix(in srgb, var(--primary-soft) 55%, var(--canvas)));
}

.auth-topbar {
  display: flex;
  width: min(1240px, calc(100% - 48px));
  height: 82px;
  align-items: center;
  justify-content: space-between;
  margin: 0 auto;
}

.auth-layout {
  display: grid;
  width: min(1160px, calc(100% - 48px));
  min-height: calc(100vh - 82px);
  align-items: center;
  margin: 0 auto;
  padding: 38px 0 78px;
  grid-template-columns: minmax(0, 1.2fr) minmax(360px, .8fr);
  gap: 88px;
}

.auth-intro {
  max-width: 650px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 7px 11px;
  border-radius: 999px;
  color: var(--primary-strong);
  background: var(--primary-soft);
  font-size: 12px;
  font-weight: 900;
}

.auth-intro h1 {
  margin: 18px 0 18px;
  color: var(--text-strong);
  font-size: clamp(38px, 5vw, 61px);
  line-height: 1.12;
  letter-spacing: -.055em;
}

.auth-intro h1 em {
  color: var(--primary);
  font-style: normal;
}

.auth-intro > p {
  max-width: 580px;
  margin: 0;
  color: var(--muted);
  font-size: 17px;
  line-height: 1.75;
}

.auth-benefits {
  display: grid;
  margin-top: 37px;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.auth-benefits > div {
  display: grid;
  min-width: 0;
  padding: 17px 15px;
  border: 1px solid var(--line);
  border-radius: 17px;
  background: color-mix(in srgb, var(--surface) 76%, transparent);
  box-shadow: var(--shadow-sm);
  backdrop-filter: blur(10px);
}

.auth-benefits > div > span {
  display: grid;
  width: 31px;
  height: 31px;
  margin-bottom: 11px;
  place-items: center;
  border-radius: 10px;
  color: var(--primary);
  background: var(--primary-soft);
  font-weight: 900;
}

.auth-benefits strong {
  margin-bottom: 3px;
  font-size: 13px;
}

.auth-benefits small {
  overflow: hidden;
  color: var(--muted);
  font-size: 11px;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.auth-card-wrap {
  width: 100%;
  max-width: 440px;
  justify-self: end;
}

.auth-card {
  padding: 28px;
  border: 1px solid color-mix(in srgb, var(--line) 83%, transparent);
  border-radius: var(--radius-lg);
  background: color-mix(in srgb, var(--surface) 94%, transparent);
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
}

.auth-card-heading {
  display: flex;
  align-items: center;
  gap: 13px;
}

.auth-card-heading h2 {
  margin: 0;
  color: var(--text-strong);
  font-size: 22px;
  letter-spacing: -.03em;
}

.auth-card-heading p {
  margin: 3px 0 0;
  color: var(--muted);
  font-size: 12px;
}

.auth-tabs {
  display: grid;
  margin: 25px 0 20px;
  padding: 4px;
  border-radius: 13px;
  background: var(--surface-soft);
  grid-template-columns: 1fr 1fr 1fr;
}

.auth-tabs button {
  padding: 10px;
  border: 0;
  border-radius: 10px;
  color: var(--muted);
  background: transparent;
  font-size: 13px;
  font-weight: 800;
}

.auth-tabs button[aria-selected="true"] {
  color: var(--text-strong);
  background: var(--surface-raised);
  box-shadow: 0 4px 13px rgba(30, 72, 112, .1);
}

.auth-form,
.field {
  display: grid;
}

.auth-form {
  gap: 14px;
}

.field > span,
.form-field > label {
  margin-bottom: 7px;
  color: var(--muted-strong);
  font-size: 12px;
  font-weight: 800;
}

.field input,
.form-control,
.widget-input,
.widget-textarea,
.widget-select {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 12px;
  color: var(--text);
  background: var(--surface-soft);
}

.field input {
  min-height: 48px;
  padding: 11px 13px;
}

.field input::placeholder,
.widget-input::placeholder,
.widget-textarea::placeholder {
  color: color-mix(in srgb, var(--muted) 70%, transparent);
}

.field input:focus,
.widget-input:focus,
.widget-textarea:focus,
.widget-select:focus {
  border-color: var(--primary);
  outline: 3px solid color-mix(in srgb, var(--primary) 14%, transparent);
}

.field-hint {
  margin: -7px 2px 0;
  color: var(--muted);
  font-size: 10px;
  line-height: 1.5;
}

.form-message {
  min-height: 18px;
  margin: -2px 1px 0;
  color: var(--danger);
  font-size: 12px;
}

.auth-submit {
  width: 100%;
  min-height: 49px;
  justify-content: space-between;
  margin-top: 1px;
  padding-inline: 18px;
}

.auth-note {
  margin: 14px 0 0;
  color: var(--muted);
  font-size: 10px;
  text-align: center;
}

.app-topbar {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  height: var(--topbar);
  align-items: center;
  gap: 12px;
  padding: 0 24px;
  border-bottom: 1px solid var(--line);
  background: color-mix(in srgb, var(--surface) 91%, transparent);
  backdrop-filter: blur(18px);
}

.topbar-actions {
  position: relative;
  display: flex;
  align-items: center;
  gap: 9px;
  margin-left: auto;
}

.user-chip {
  display: flex;
  min-height: 45px;
  align-items: center;
  gap: 9px;
  padding: 4px 8px 4px 5px;
  border: 1px solid var(--line);
  border-radius: 14px;
  color: var(--text);
  background: var(--surface-soft);
}

.user-avatar {
  display: grid;
  width: 35px;
  height: 35px;
  place-items: center;
  border-radius: 11px;
  color: #fff;
  background: linear-gradient(135deg, var(--secondary), var(--primary));
  font-size: 12px;
  font-weight: 900;
}

.user-label {
  display: grid;
  max-width: 130px;
  text-align: left;
}

.user-label strong,
.user-label small {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.user-label strong {
  font-size: 11px;
}

.user-label small {
  color: var(--muted);
  font-size: 9px;
}

.user-menu {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  width: 220px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--surface-raised);
  box-shadow: var(--shadow);
}

.user-menu > div {
  display: grid;
  padding: 14px;
  border-bottom: 1px solid var(--line);
}

.user-menu strong,
.user-menu small {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.user-menu strong {
  font-size: 13px;
}

.user-menu small {
  color: var(--muted);
  font-size: 11px;
}

.user-menu button {
  width: 100%;
  padding: 12px 14px;
  border: 0;
  color: var(--danger);
  background: transparent;
  font-size: 12px;
  font-weight: 800;
  text-align: left;
}

.user-menu button:hover {
  background: var(--danger-soft);
}

.header-progress {
  display: flex;
  min-width: 180px;
  max-width: 360px;
  align-items: center;
  gap: 10px;
  margin-left: 24px;
  color: var(--muted);
  font-size: 11px;
  font-weight: 800;
}

.header-progress .progress-track {
  flex: 1;
}

.dashboard,
.class-page {
  width: min(1240px, calc(100% - 48px));
  margin: 0 auto;
  padding: 42px 0 70px;
}

.page-heading {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 18px;
  margin-bottom: 24px;
}

.page-heading h1 {
  margin: 0;
  color: var(--text-strong);
  font-size: clamp(28px, 4vw, 39px);
  letter-spacing: -.045em;
}

.page-heading h1 em {
  color: var(--primary);
  font-style: normal;
}

.page-heading p {
  margin: 7px 0 0;
  color: var(--muted);
  font-size: 14px;
}

.redeem-panel {
  position: relative;
  display: grid;
  overflow: hidden;
  margin-bottom: 35px;
  padding: 25px 28px;
  border: 1px solid color-mix(in srgb, var(--primary) 16%, var(--line));
  border-radius: 23px;
  background:
    radial-gradient(circle at 93% -35%, color-mix(in srgb, var(--mint) 18%, transparent), transparent 17rem),
    linear-gradient(135deg, var(--surface-raised), color-mix(in srgb, var(--primary-soft) 67%, var(--surface)));
  box-shadow: var(--shadow-sm);
  grid-template-columns: minmax(0, 1fr) minmax(340px, .85fr);
  gap: 28px;
}

.redeem-copy {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  gap: 16px;
}

.redeem-icon {
  display: grid;
  width: 58px;
  height: 58px;
  flex: 0 0 auto;
  place-items: center;
  border-radius: 18px;
  color: var(--primary);
  background: var(--primary-soft);
  font-size: 27px;
}

.redeem-copy h2 {
  margin: 0 0 4px;
  font-size: 18px;
  letter-spacing: -.02em;
}

.redeem-copy p {
  margin: 0;
  color: var(--muted);
  font-size: 12px;
}

.redeem-form {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  gap: 9px;
}

.redeem-form input {
  min-width: 0;
  height: 47px;
  flex: 1;
  padding: 11px 14px;
  border: 1px solid var(--line-strong);
  border-radius: 12px;
  color: var(--text);
  background: var(--surface-raised);
  font-weight: 800;
  letter-spacing: .05em;
  text-transform: uppercase;
}

.section-title {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 14px;
  margin: 0 2px 16px;
}

.section-title h2 {
  margin: 0;
  color: var(--text-strong);
  font-size: 22px;
  letter-spacing: -.03em;
}

.section-title p,
.section-title small {
  margin: 3px 0 0;
  color: var(--muted);
  font-size: 11px;
}

.class-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 19px;
}

.class-card {
  position: relative;
  display: grid;
  min-height: 250px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 23px;
  background: var(--surface-raised);
  box-shadow: var(--shadow-sm);
  transition: transform .2s ease, border-color .2s ease, box-shadow .2s ease;
}

.class-card:hover {
  border-color: color-mix(in srgb, var(--primary) 35%, var(--line));
  box-shadow: var(--shadow);
  transform: translateY(-3px);
}

.class-card-accent {
  height: 8px;
  background: linear-gradient(90deg, var(--primary), var(--secondary), var(--mint));
}

.class-card-body {
  display: grid;
  padding: 22px;
}

.class-card-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 14px;
}

.status-badge,
.meta-pill,
.phase-pill,
.widget-code {
  display: inline-flex;
  align-items: center;
  border-radius: 999px;
  font-size: 10px;
  font-weight: 850;
}

.status-badge {
  gap: 5px;
  padding: 6px 9px;
  color: var(--success);
  background: var(--success-soft);
}

.status-badge::before {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: currentColor;
  content: "";
}

.status-badge.completed {
  color: var(--primary);
  background: var(--primary-soft);
}

.status-badge.inactive {
  color: var(--muted);
  background: var(--surface-soft);
}

.class-code {
  color: var(--muted);
  font-size: 10px;
  font-weight: 800;
  letter-spacing: .08em;
}

.class-card h3 {
  margin: 14px 0 7px;
  color: var(--text-strong);
  font-size: 21px;
  letter-spacing: -.03em;
}

.class-card-description {
  min-height: 38px;
  margin: 0;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.6;
}

.class-card-footer {
  align-self: end;
  margin-top: 22px;
}

.progress-label {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 7px;
  color: var(--muted);
  font-size: 10px;
  font-weight: 800;
}

.progress-label strong {
  color: var(--primary);
}

.progress-track {
  height: 8px;
  overflow: hidden;
  border-radius: 99px;
  background: color-mix(in srgb, var(--muted) 13%, transparent);
}

.progress-fill {
  display: block;
  width: 0;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  transition: width .35s ease;
}

.class-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  margin-top: 13px;
}

.meta-pill {
  padding: 6px 8px;
  border: 1px solid var(--line);
  color: var(--muted-strong);
  background: var(--surface-soft);
}

.empty-state,
.error-state {
  display: grid;
  min-height: 250px;
  padding: 35px;
  place-items: center;
  border: 1px dashed var(--line-strong);
  border-radius: 20px;
  color: var(--muted);
  background: color-mix(in srgb, var(--surface) 70%, transparent);
  text-align: center;
}

.empty-state-icon {
  display: grid;
  width: 66px;
  height: 66px;
  margin: 0 auto 13px;
  place-items: center;
  border-radius: 21px;
  color: var(--primary);
  background: var(--primary-soft);
  font-size: 30px;
}

.empty-state h2,
.empty-state h3,
.error-state h2 {
  margin: 0 0 7px;
  color: var(--text-strong);
}

.empty-state p,
.error-state p {
  max-width: 440px;
  margin: 0 0 16px;
  font-size: 13px;
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 17px;
  border: 0;
  color: var(--muted-strong);
  background: transparent;
  font-size: 12px;
  font-weight: 800;
}

.class-hero {
  position: relative;
  display: grid;
  overflow: hidden;
  margin-bottom: 30px;
  padding: 31px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background:
    radial-gradient(circle at 93% -10%, color-mix(in srgb, var(--mint) 19%, transparent), transparent 20rem),
    linear-gradient(135deg, var(--surface-raised), color-mix(in srgb, var(--primary-soft) 74%, var(--surface)));
  box-shadow: var(--shadow-sm);
  grid-template-columns: minmax(0, 1.35fr) minmax(260px, .65fr);
  gap: 35px;
}

.class-hero h1 {
  margin: 12px 0 8px;
  color: var(--text-strong);
  font-size: clamp(27px, 4vw, 38px);
  letter-spacing: -.045em;
}

.class-hero p {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
}

.class-access-hint {
  margin-top: 10px !important;
  color: #b45309 !important;
  font-weight: 800;
}

.hero-metrics {
  position: relative;
  z-index: 1;
  display: grid;
  padding: 16px 18px;
  border: 1px solid color-mix(in srgb, var(--line) 82%, transparent);
  border-radius: 18px;
  background: color-mix(in srgb, var(--surface) 75%, transparent);
  backdrop-filter: blur(8px);
}

.hero-metric {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 9px 0;
  border-bottom: 1px solid var(--line);
  color: var(--muted);
  font-size: 11px;
}

.hero-metric:last-child {
  border-bottom: 0;
}

.hero-metric strong {
  color: var(--text-strong);
  font-size: 16px;
}

.curriculum-list {
  display: grid;
  gap: 11px;
}

.course-row {
  display: grid;
  min-width: 0;
  align-items: center;
  padding: 17px 18px;
  border: 1px solid var(--line);
  border-radius: 17px;
  color: var(--text);
  background: var(--surface-raised);
  box-shadow: var(--shadow-sm);
  grid-template-columns: 46px minmax(0, 1fr) auto;
  gap: 15px;
  text-align: left;
  transition: border-color .18s ease, transform .18s ease, background .18s ease;
}

.course-row:not(:disabled):hover {
  border-color: color-mix(in srgb, var(--primary) 38%, var(--line));
  background: color-mix(in srgb, var(--primary-soft) 35%, var(--surface-raised));
  transform: translateX(3px);
}

.course-number {
  display: grid;
  width: 46px;
  height: 46px;
  place-items: center;
  border-radius: 14px;
  color: var(--primary);
  background: var(--primary-soft);
  font-size: 13px;
  font-weight: 950;
}

.course-row.completed .course-number {
  color: var(--success);
  background: var(--success-soft);
}

.course-row-copy {
  min-width: 0;
}

.course-row-copy strong {
  display: block;
  overflow: hidden;
  margin-bottom: 3px;
  color: var(--text-strong);
  font-size: 15px;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.course-row-copy small {
  display: block;
  overflow: hidden;
  color: var(--muted);
  font-size: 10px;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.course-row-side {
  display: flex;
  align-items: center;
  gap: 12px;
}

.course-row-progress {
  min-width: 72px;
  color: var(--muted);
  font-size: 10px;
  font-weight: 800;
  text-align: right;
}

.runtime-page {
  min-height: calc(100vh - var(--topbar));
}

.course-intro-shell {
  width: min(1080px, calc(100% - 64px));
  margin: 36px auto 60px;
  padding: 32px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--surface);
  box-shadow: var(--shadow);
}

.course-intro-heading h1 { margin: 12px 0; font-size: clamp(26px, 2.5vw, 38px); line-height: 1.4; }
.course-intro-heading p { margin: 0 0 24px; color: var(--muted-strong); font-size: 17px; line-height: 1.7; }
.course-intro-player { overflow: hidden; aspect-ratio: 16 / 9; border-radius: 18px; background: #020713; }
.course-intro-player video { display: block; width: 100%; height: 100%; object-fit: contain; }
.course-intro-status { margin: 16px 0; color: var(--muted-strong); font-size: 15px; line-height: 1.65; }
.course-intro-transcript { margin: 20px 0; padding: 16px 20px; border: 1px solid var(--line); border-radius: 12px; }
.course-intro-transcript summary { cursor: pointer; color: var(--text); font-size: 16px; font-weight: 700; }
.course-intro-transcript p { color: var(--muted-strong); font-size: 17px; line-height: 1.85; white-space: pre-line; }
.course-intro-actions { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 18px; padding-top: 16px; }
.course-intro-actions p { flex: 1 1 280px; margin: 0; color: var(--muted); font-size: 15px; line-height: 1.7; }
.course-intro-actions .button { min-height: 50px; font-size: 17px; }

.learner-runtime {
  display: grid;
  min-height: calc(100vh - var(--topbar));
  grid-template-columns: 270px minmax(0, 1fr) 350px;
}

.step-sidebar {
  position: sticky;
  top: var(--topbar);
  height: calc(100vh - var(--topbar));
  overflow: auto;
  padding: 18px 13px;
  border-right: 1px solid var(--line);
  background: color-mix(in srgb, var(--surface) 93%, transparent);
  scrollbar-width: thin;
}

.sidebar-back {
  display: flex;
  width: 100%;
  align-items: center;
  gap: 7px;
  padding: 9px;
  border: 0;
  border-radius: 10px;
  color: var(--muted);
  background: transparent;
  font-size: 13px;
  font-weight: 800;
  text-align: left;
}

.sidebar-back:hover {
  color: var(--primary);
  background: var(--primary-soft);
}

.sidebar-title {
  padding: 11px 9px 14px;
  border-bottom: 1px solid var(--line);
}

.sidebar-title h2 {
  margin: 0 0 3px;
  overflow: hidden;
  color: var(--text-strong);
  font-size: 16px;
  letter-spacing: -.02em;
  text-overflow: ellipsis;
}

.sidebar-title p {
  margin: 0;
  color: var(--muted);
  font-size: 12px;
}

.step-list {
  display: grid;
  gap: 3px;
  margin-top: 13px;
}

.step-button {
  display: grid;
  width: 100%;
  min-width: 0;
  align-items: center;
  padding: 9px;
  border: 1px solid transparent;
  border-radius: 13px;
  color: var(--muted-strong);
  background: transparent;
  grid-template-columns: 32px minmax(0, 1fr);
  gap: 9px;
  text-align: left;
}

.step-button:hover {
  background: var(--surface-soft);
}

.step-button.active {
  border-color: color-mix(in srgb, var(--primary) 18%, transparent);
  color: var(--primary);
  background: var(--primary-soft);
}

.step-index {
  display: grid;
  width: 32px;
  height: 32px;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--surface-soft);
  font-size: 12px;
  font-weight: 950;
}

.step-button.active .step-index,
.step-button.done .step-index {
  border-color: transparent;
  color: #fff;
  background: linear-gradient(135deg, var(--secondary), var(--primary));
}

.step-button.done:not(.active) .step-index {
  background: var(--success);
}

.step-button.locked {
  color: var(--muted);
  background: color-mix(in srgb, var(--surface-soft) 72%, transparent);
}

.step-button.locked:hover {
  background: color-mix(in srgb, var(--surface-soft) 72%, transparent);
}

.step-button.locked .step-index {
  border-style: dashed;
  color: var(--muted);
  background: transparent;
  font-size: 12px;
}

.step-button.locked .step-copy small {
  line-height: 1.35;
  text-transform: none;
  white-space: normal;
}

.step-copy {
  min-width: 0;
}

.step-copy strong,
.step-copy small {
  display: block;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.step-copy strong {
  font-size: 13px;
  line-height: 1.45;
  white-space: normal;
}

.step-copy small {
  margin-top: 4px;
  color: var(--muted);
  font-size: 11px;
  line-height: 1.4;
  text-transform: uppercase;
  white-space: normal;
}

.runtime-main {
  min-width: 0;
  padding: 28px clamp(18px, 3vw, 38px) 50px;
}

.runtime-inner {
  width: min(920px, 100%);
  margin: 0 auto;
}

.runtime-heading {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 18px;
  margin-bottom: 18px;
}

.phase-pill {
  padding: 6px 9px;
  color: var(--primary);
  background: var(--primary-soft);
  letter-spacing: .03em;
  text-transform: uppercase;
}

.runtime-heading h1 {
  margin: 8px 0 5px;
  color: var(--text-strong);
  font-size: clamp(24px, 3vw, 31px);
  letter-spacing: -.04em;
}

.runtime-heading p {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
}

.widget-code {
  flex: 0 0 auto;
  padding: 7px 9px;
  border: 1px solid var(--line);
  color: var(--muted);
  background: var(--surface-soft);
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  letter-spacing: -.02em;
}

.slide-card,
.activity-card {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface-raised);
  box-shadow: var(--shadow-sm);
}

.slide-card {
  position: relative;
  display: grid;
  min-height: 290px;
  margin-bottom: 16px;
  padding: 10px;
  place-items: center;
}

.slide-card img {
  display: block;
  width: 100%;
  max-height: 490px;
  border-radius: 14px;
  background: var(--surface-soft);
  object-fit: contain;
}

.slide-placeholder {
  display: grid;
  width: 100%;
  min-height: 310px;
  padding: 28px;
  place-items: center;
  border-radius: 14px;
  color: var(--muted);
  background:
    radial-gradient(circle at 75% 16%, color-mix(in srgb, var(--primary) 16%, transparent), transparent 12rem),
    linear-gradient(135deg, var(--primary-soft), var(--surface-soft));
  text-align: center;
}

.slide-placeholder-icon {
  display: grid;
  width: 76px;
  height: 76px;
  margin: 0 auto 13px;
  place-items: center;
  border-radius: 23px;
  color: var(--primary);
  background: var(--surface-raised);
  box-shadow: var(--shadow-sm);
  font-size: 34px;
}

.slide-placeholder strong {
  display: block;
  margin-bottom: 5px;
  color: var(--text-strong);
  font-size: 17px;
}

.slide-badge {
  position: absolute;
  right: 18px;
  bottom: 18px;
  z-index: 2;
  padding: 6px 9px;
  border: 1px solid rgba(255, 255, 255, .17);
  border-radius: 999px;
  color: #fff;
  background: rgba(11, 31, 54, .72);
  font-size: 9px;
  font-weight: 850;
  backdrop-filter: blur(8px);
}

.activity-card {
  padding: 23px;
}

.activity-title {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 17px;
}

.activity-title h2 {
  margin: 0 0 4px;
  color: var(--text-strong);
  font-size: 18px;
  letter-spacing: -.025em;
}

.activity-title p {
  margin: 0;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.6;
}

.required-mark {
  flex: 0 0 auto;
  color: var(--danger);
  font-size: 10px;
  font-weight: 850;
}

.activity-body {
  display: grid;
  gap: 13px;
}

.widget-input,
.widget-select {
  min-height: 44px;
  padding: 10px 12px;
}

.widget-textarea {
  min-height: 132px;
  padding: 12px;
  line-height: 1.65;
  resize: vertical;
}

.widget-textarea.code {
  min-height: 220px;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 12px;
  tab-size: 2;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.form-field {
  display: grid;
  min-width: 0;
}

.form-field.full {
  grid-column: 1 / -1;
}

.choice-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 9px;
}

.choice-button {
  display: flex;
  min-height: 49px;
  align-items: center;
  gap: 9px;
  padding: 11px 13px;
  border: 1px solid var(--line);
  border-radius: 13px;
  color: var(--muted-strong);
  background: var(--surface-soft);
  font-size: 12px;
  font-weight: 800;
  text-align: left;
}

.choice-button::before {
  width: 17px;
  height: 17px;
  flex: 0 0 auto;
  border: 2px solid var(--line-strong);
  border-radius: 50%;
  content: "";
}

.choice-button:hover,
.choice-button.selected {
  border-color: var(--primary);
  color: var(--primary);
  background: var(--primary-soft);
}

.choice-button.selected::before {
  border: 5px solid var(--primary);
  background: var(--surface-raised);
}

.concept-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
  gap: 10px;
}

.concept-card,
.info-card {
  padding: 15px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--surface-soft);
}

.concept-card strong {
  display: block;
  margin-bottom: 6px;
  color: var(--text-strong);
  font-size: 13px;
}

.concept-card p,
.info-card p {
  margin: 0;
  color: var(--muted);
  font-size: 11px;
  line-height: 1.65;
}

.summary-result-grid {
  margin-top: 10px;
}

.summary-value {
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

.upload-file-actions {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-top: 10px;
}

.generated-image-workspace {
  display: grid;
  align-items: start;
  grid-template-columns: minmax(0, .92fr) minmax(0, 1.08fr);
  gap: 16px;
}

.generated-image-input-panel,
.generated-image-output-panel {
  display: grid;
  min-width: 0;
  gap: 13px;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--surface-soft);
}

.generated-image-input-panel .widget-textarea {
  min-height: 330px;
}

.generated-image-reference {
  display: grid;
  min-width: 0;
  align-items: center;
  grid-template-columns: minmax(0, 1fr) 150px;
  gap: 14px;
  padding: 12px;
  border: 1px solid color-mix(in srgb, var(--primary) 32%, var(--line));
  border-radius: 14px;
  background: color-mix(in srgb, var(--primary-soft) 58%, var(--surface-raised));
}

.generated-image-reference.missing {
  grid-template-columns: 1fr;
  border-color: color-mix(in srgb, var(--danger) 34%, var(--line));
  background: color-mix(in srgb, var(--danger-soft) 52%, var(--surface-raised));
}

.generated-image-reference > div:first-child {
  display: grid;
  min-width: 0;
  gap: 4px;
}

.generated-image-reference strong,
.generated-image-reference span,
.generated-image-reference small {
  overflow-wrap: anywhere;
}

.generated-image-reference strong {
  color: var(--primary);
  font-size: 12px;
}

.generated-image-reference span {
  color: var(--text-strong);
  font-size: 13px;
  font-weight: 850;
}

.generated-image-reference small {
  color: var(--muted);
  font-size: 11px;
  line-height: 1.5;
}

.generated-image-reference figure {
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--surface-raised);
}

.generated-image-reference [data-generated-image-preview] {
  display: grid;
  min-height: 84px;
  place-items: center;
}

.generated-image-reference img {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.generated-image-reference figcaption {
  padding: 5px 7px;
  color: var(--muted);
  font-size: 10px;
}

.generated-image-prompt-help {
  margin: 0;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.55;
}

.generated-image-output-panel > header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.generated-image-output-panel > header strong {
  color: var(--text-strong);
  font-size: 15px;
}

.generated-image-output-panel > header span {
  color: var(--muted);
  font-size: 12px;
}

.generated-image-empty {
  display: grid;
  min-height: 330px;
  place-items: center;
  align-content: center;
  gap: 10px;
  padding: 28px;
  border: 1px dashed var(--line-strong);
  border-radius: 14px;
  color: var(--muted);
  background: var(--surface-raised);
  text-align: center;
}

.generated-image-empty span {
  font-size: 34px;
}

.generated-image-empty p {
  max-width: 280px;
  margin: 0;
  font-size: 13px;
  line-height: 1.65;
}

.generated-image-workspace > .privacy-note {
  margin: 0;
  grid-column: 1 / -1;
}

.generated-image-gallery {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 260px), 1fr));
  gap: 16px;
}

.generated-image-card {
  display: grid;
  align-content: start;
  gap: 10px;
  min-width: 0;
}

.generated-image-controls,
.generated-image-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.generated-image-controls span,
.privacy-note {
  color: var(--muted);
  font-size: 11px;
}

.generated-image-result {
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--surface-soft);
}

.generated-image-result [data-generated-image-preview] {
  display: grid;
  min-height: 240px;
  place-items: center;
}

.generated-image-result img {
  display: block;
  width: 100%;
  max-height: 620px;
  object-fit: contain;
}

.generated-image-result figcaption {
  padding: 10px 12px;
  color: var(--muted);
  font-size: 11px;
}

.generated-video-workspace {
  display: grid;
  gap: 14px;
}

.generated-video-source-summary {
  display: grid;
  gap: 7px;
  padding: 18px;
  border: 1px solid color-mix(in srgb, var(--primary) 28%, var(--line));
  border-radius: 16px;
  background: color-mix(in srgb, var(--primary-soft) 72%, var(--surface));
}

.generated-video-source-summary strong {
  color: var(--text-strong);
  font-size: 16px;
}

.generated-video-source-summary p {
  margin: 0;
  color: var(--text);
  line-height: 1.65;
}

.generated-video-source-summary span {
  color: var(--primary);
  font-size: 12px;
  font-weight: 900;
}

.generated-video-controls,
.generated-video-card footer,
.generated-video-card footer > div {
  display: flex;
  align-items: center;
  gap: 10px;
}

.generated-video-controls {
  flex-wrap: wrap;
  justify-content: space-between;
}

.generated-video-controls label {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--muted);
  font-size: 12px;
}

.generated-video-controls .widget-select.compact {
  min-width: 88px;
  padding: 8px 10px;
}

.generated-video-gallery {
  display: grid;
  gap: 14px;
}

.generated-video-card {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--surface-soft);
}

.generated-video-preview {
  display: grid;
  min-height: 260px;
  place-items: center;
  background: #080b12;
  color: #fff;
}

.generated-video-preview video {
  display: block;
  width: 100%;
  max-height: 620px;
  background: #000;
}

.generated-video-progress {
  display: grid;
  gap: 10px;
  padding: 24px;
}

.generated-video-progress > div {
  overflow: hidden;
  height: 8px;
  border-radius: 999px;
  background: var(--line);
}

.generated-video-progress i {
  display: block;
  height: 100%;
  border-radius: inherit;
  background: var(--primary);
}

.generated-video-card.failed .generated-video-progress i {
  background: var(--danger);
}

.generated-video-card footer {
  justify-content: space-between;
  padding: 12px;
}

@media (max-width: 640px) {
  .generated-video-card footer {
    align-items: flex-start;
    flex-direction: column;
  }
}

.check-list {
  display: grid;
  gap: 8px;
}

.check-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 11px 12px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--surface-soft);
  font-size: 12px;
  font-weight: 750;
}

.check-item input {
  width: 18px;
  height: 18px;
  accent-color: var(--primary);
}

.repeat-list {
  display: grid;
  gap: 9px;
}

.repeat-item {
  display: grid;
  align-items: start;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 13px;
  background: var(--surface-soft);
  grid-template-columns: 30px minmax(0, 1fr) auto;
  gap: 10px;
}

.repeat-index {
  display: grid;
  width: 28px;
  height: 28px;
  place-items: center;
  border-radius: 9px;
  color: var(--primary);
  background: var(--primary-soft);
  font-size: 10px;
  font-weight: 900;
}

.repeat-item textarea {
  min-height: 68px;
}

.remove-button {
  width: 31px;
  height: 31px;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: 9px;
  color: var(--muted);
  background: var(--surface-raised);
}

.upload-zone {
  display: grid;
  min-height: 155px;
  padding: 25px;
  place-items: center;
  border: 2px dashed color-mix(in srgb, var(--primary) 35%, var(--line));
  border-radius: 17px;
  color: var(--muted);
  background: color-mix(in srgb, var(--primary-soft) 38%, var(--surface-soft));
  text-align: center;
}

.upload-zone strong {
  display: block;
  margin: 6px 0 3px;
  color: var(--text-strong);
}

.upload-zone small {
  display: block;
  margin-bottom: 12px;
  font-size: 10px;
}

.upload-file-name {
  margin-top: 10px;
  color: var(--success);
  font-size: 11px;
  font-weight: 800;
}

.table-wrap {
  overflow: auto;
  border: 1px solid var(--line);
  border-radius: 13px;
}

.widget-table {
  width: 100%;
  min-width: 650px;
  border-collapse: collapse;
  font-size: 11px;
}

.widget-table th,
.widget-table td {
  padding: 8px;
  border-bottom: 1px solid var(--line);
  text-align: left;
}

.widget-table th {
  color: var(--muted-strong);
  background: var(--surface-soft);
  font-size: 10px;
}

.widget-table input {
  min-width: 95px;
  padding: 8px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface-raised);
}

.rich-toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
  padding: 8px;
  border: 1px solid var(--line);
  border-bottom: 0;
  border-radius: 12px 12px 0 0;
  background: var(--surface-soft);
}

.rich-toolbar button {
  min-width: 33px;
  min-height: 31px;
  padding: 5px 8px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface-raised);
  font-size: 11px;
}

.rich-editor {
  min-height: 210px;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 0 0 12px 12px;
  background: var(--surface-soft);
  line-height: 1.7;
}

.ai-unavailable {
  display: flex;
  align-items: flex-start;
  gap: 11px;
  padding: 13px;
  border: 1px solid color-mix(in srgb, var(--warning) 26%, transparent);
  border-radius: 13px;
  color: var(--warning);
  background: var(--warning-soft);
}

.ai-unavailable strong {
  display: block;
  margin-bottom: 2px;
  font-size: 12px;
}

.ai-unavailable p {
  margin: 0;
  color: var(--muted-strong);
  font-size: 10px;
  line-height: 1.55;
}

.unsupported-widget {
  padding: 17px;
  border: 1px dashed var(--line-strong);
  border-radius: 14px;
  color: var(--muted);
  background: var(--surface-soft);
  font-size: 12px;
}

.unsupported-widget strong {
  display: block;
  margin-bottom: 5px;
  color: var(--text-strong);
}

.unsupported-widget details {
  margin-top: 12px;
}

.unsupported-widget pre {
  max-height: 240px;
  overflow: auto;
  padding: 10px;
  border-radius: 10px;
  background: var(--canvas-deep);
  font-size: 10px;
  white-space: pre-wrap;
}

.experience-workspace {
  display: grid;
  align-items: start;
  gap: 16px;
  margin-bottom: 18px;
}

.experience-workspace.layout-full,
.experience-workspace.layout-focus,
.experience-workspace.without-main {
  grid-template-columns: minmax(0, 1fr);
}

.experience-workspace.layout-split_left,
.experience-workspace.layout-split_right {
  grid-template-columns: minmax(0, 1.08fr) minmax(280px, .92fr);
}

.experience-workspace.layout-split_right .activity-card {
  order: -1;
}

.experience-workspace .slide-card,
.experience-workspace .activity-card {
  min-width: 0;
  margin-bottom: 0;
}

.experience-workspace.layout-focus .experience-main {
  min-height: 430px;
}

.experience-main:not(.slide-card) {
  position: relative;
  display: grid;
  min-height: 320px;
  overflow: hidden;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface-raised);
  box-shadow: var(--shadow-sm);
}

.experience-video {
  padding: 10px;
  background: #071526 !important;
}

.experience-video video {
  display: block;
  width: 100%;
  max-height: 540px;
  border-radius: 14px;
  background: #020711;
}

.experience-media-placeholder {
  display: grid;
  max-width: 430px;
  padding: 35px;
  place-items: center;
  color: rgba(255, 255, 255, .72);
  text-align: center;
}

.experience-media-placeholder strong {
  margin-top: 14px;
  color: #fff;
}

.experience-media-placeholder p {
  margin: 5px 0 0;
  font-size: 12px;
}

.experience-media-icon {
  display: grid;
  width: 72px;
  height: 72px;
  place-items: center;
  border: 1px solid rgba(255, 255, 255, .18);
  border-radius: 24px;
  color: #fff;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  box-shadow: 0 20px 45px rgba(0, 0, 0, .25);
  font-size: 24px;
}

.ai-canvas-placeholder {
  padding: 38px 28px;
  color: #fff;
  background:
    radial-gradient(circle at 78% 18%, rgba(92, 225, 175, .25), transparent 13rem),
    radial-gradient(circle at 15% 95%, rgba(152, 101, 255, .3), transparent 15rem),
    linear-gradient(145deg, #0a2146, #173c76 56%, #4b328d) !important;
  text-align: center;
}

.ai-canvas-placeholder:focus-visible {
  outline: 3px solid color-mix(in srgb, var(--mint) 75%, white);
  outline-offset: 3px;
}

.canvas-orbit {
  position: relative;
  display: grid;
  width: 104px;
  height: 104px;
  margin-bottom: 18px;
  place-items: center;
  border: 1px solid rgba(255, 255, 255, .22);
  border-radius: 50%;
  background: rgba(255, 255, 255, .1);
  box-shadow: 0 0 0 13px rgba(255, 255, 255, .045), 0 25px 55px rgba(0, 0, 0, .22);
}

.canvas-orbit span {
  font-size: 42px;
}

.canvas-orbit i {
  position: absolute;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--mint);
}

.canvas-orbit i:nth-child(2) { top: 4px; right: 18px; }
.canvas-orbit i:nth-child(3) { right: -3px; bottom: 24px; background: #ffd65a; }
.canvas-orbit i:nth-child(4) { bottom: 5px; left: 16px; background: #a7bfff; }

.canvas-kicker,
.experience-eyebrow {
  color: var(--mint);
  font-size: 9px;
  font-weight: 900;
  letter-spacing: .16em;
}

.ai-canvas-placeholder h2 {
  max-width: 560px;
  margin: 8px 0 7px;
  font-size: clamp(22px, 3vw, 31px);
  letter-spacing: -.035em;
}

.ai-canvas-placeholder p {
  max-width: 570px;
  margin: 0;
  color: rgba(255, 255, 255, .72);
  font-size: 12px;
  line-height: 1.65;
}

.canvas-mode {
  margin-top: 16px;
  padding: 6px 10px;
  border: 1px solid rgba(255, 255, 255, .2);
  border-radius: 999px;
  color: rgba(255, 255, 255, .82);
  background: rgba(255, 255, 255, .08);
  font-size: 9px;
  font-weight: 850;
}

.experience-sequence-card {
  overflow: hidden;
  padding: 24px;
  border: 1px solid color-mix(in srgb, var(--primary) 20%, var(--line));
  border-radius: var(--radius);
  background:
    radial-gradient(circle at 95% -20%, color-mix(in srgb, var(--mint) 14%, transparent), transparent 18rem),
    var(--surface-raised);
  box-shadow: var(--shadow-sm);
}

.experience-sequence-heading {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 18px;
  margin-bottom: 18px;
}

.experience-sequence-heading h2 {
  margin: 5px 0 3px;
  color: var(--text-strong);
  font-size: 20px;
  letter-spacing: -.03em;
}

.experience-sequence-heading p {
  margin: 0;
  color: var(--muted);
  font-size: 11px;
}

.experience-action-count {
  flex: 0 0 auto;
  padding: 8px 11px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--primary);
  background: var(--primary-soft);
  font-size: 11px;
  font-weight: 900;
}

.experience-sequence-list {
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.experience-action,
.experience-narration {
  position: relative;
  display: grid;
  min-width: 0;
  align-items: center;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--surface-soft);
  grid-template-columns: 42px minmax(0, 1fr) auto;
  gap: 13px;
}

.experience-narration {
  border-color: color-mix(in srgb, var(--secondary) 22%, var(--line));
  background: color-mix(in srgb, var(--primary-soft) 62%, var(--surface));
}

.experience-action.current {
  border-color: color-mix(in srgb, var(--primary) 58%, var(--line));
  background: color-mix(in srgb, var(--primary-soft) 72%, var(--surface));
  box-shadow: 0 0 0 2px color-mix(in srgb, var(--primary) 9%, transparent);
}

.experience-action.done {
  border-color: color-mix(in srgb, var(--success) 34%, var(--line));
  background: color-mix(in srgb, var(--success-soft) 78%, var(--surface));
}

.experience-action.locked,
.experience-narration.locked {
  opacity: .62;
}

.sequence-marker {
  display: grid;
  width: 42px;
  height: 42px;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 14px;
  color: var(--primary);
  background: var(--surface-raised);
  font-size: 12px;
  font-weight: 950;
}

.experience-action.current .action-marker {
  border-color: transparent;
  color: #fff;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
}

.experience-action.done .action-marker {
  border-color: transparent;
  color: #fff;
  background: var(--success);
}

.narration-marker {
  color: var(--secondary);
}

.sequence-kind {
  display: block;
  margin-bottom: 2px;
  color: var(--muted);
  font-size: 8px;
  font-weight: 900;
  letter-spacing: .08em;
  text-transform: uppercase;
}

.experience-action-copy h3,
.experience-narration p {
  margin: 0;
  color: var(--text-strong);
}

.experience-action-copy h3 {
  font-size: 14px;
}

.experience-action-copy p,
.experience-narration p {
  margin-top: 3px;
  color: var(--muted-strong);
  font-size: 11px;
  line-height: 1.6;
}

.experience-action-controls {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 7px;
}

.experience-action-button,
.action-complete-button,
.narration-speak,
.coach-speech-button {
  display: inline-flex;
  min-height: 36px;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 8px 11px;
  border: 1px solid var(--line);
  border-radius: 11px;
  color: var(--muted-strong);
  background: var(--surface-raised);
  font-size: 9px;
  font-weight: 900;
}

.experience-action-button {
  border-color: transparent;
  color: #fff;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
}

.action-complete-button:hover,
.narration-speak:hover {
  border-color: color-mix(in srgb, var(--primary) 40%, var(--line));
  color: var(--primary);
}

.narration-speak.speaking,
.coach-speech-button.speaking {
  color: var(--success);
  background: var(--success-soft);
}

.action-complete-badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 7px 10px;
  border-radius: 999px;
  color: var(--success);
  background: var(--success-soft);
  font-size: 9px;
  font-weight: 900;
}

.presentation-recording {
  display: grid;
  min-width: 0;
  align-items: center;
  grid-column: 2 / -1;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 10px 12px;
  padding: 12px;
  border: 1px solid color-mix(in srgb, var(--primary) 22%, var(--line));
  border-radius: 14px;
  background: color-mix(in srgb, var(--primary-soft) 52%, var(--surface-raised));
}

.presentation-recording.recording,
.presentation-recording.stopping {
  border-color: color-mix(in srgb, var(--danger) 42%, var(--line));
  background: color-mix(in srgb, var(--danger-soft) 62%, var(--surface-raised));
}

.presentation-recording.ready {
  border-color: color-mix(in srgb, var(--success) 35%, var(--line));
  background: color-mix(in srgb, var(--success-soft) 62%, var(--surface-raised));
}

.recording-live-status {
  display: inline-flex;
  min-width: 0;
  align-items: center;
  gap: 8px;
  color: var(--muted-strong);
  font-size: 11px;
}

.recording-live-status.active {
  color: var(--danger);
}

.recording-live-status time {
  min-width: 44px;
  padding: 3px 7px;
  border-radius: 999px;
  color: var(--text-strong);
  background: var(--surface-raised);
  font-variant-numeric: tabular-nums;
  font-weight: 900;
  text-align: center;
}

.recording-live-dot {
  display: inline-block;
  width: 9px;
  height: 9px;
  flex: 0 0 9px;
  border-radius: 999px;
  background: var(--danger);
  box-shadow: 0 0 0 0 color-mix(in srgb, var(--danger) 42%, transparent);
}

.recording-live-status.active .recording-live-dot {
  animation: recording-pulse 1.5s ease-out infinite;
}

.recording-button {
  display: inline-flex;
  min-height: 40px;
  align-items: center;
  justify-content: center;
  gap: 7px;
  padding: 8px 13px;
  border: 1px solid transparent;
  border-radius: 11px;
  color: #fff;
  background: var(--danger);
  font-size: 10px;
  font-weight: 900;
}

.recording-button:hover:not(:disabled) {
  filter: brightness(1.05);
  transform: translateY(-1px);
}

.recording-button.secondary {
  border-color: var(--line-strong);
  color: var(--muted-strong);
  background: var(--surface-raised);
}

.recording-button.save {
  color: #fff;
  background: var(--primary);
}

.recording-playback {
  width: 100%;
  min-width: 0;
  grid-column: 1 / -1;
  accent-color: var(--primary);
}

.recording-ready-actions {
  display: flex;
  align-items: center;
  grid-column: 1 / -1;
  flex-wrap: wrap;
  gap: 8px;
}

.recording-message,
.recording-save-message,
.recording-local-note {
  margin: 0;
  grid-column: 1 / -1;
  line-height: 1.55;
}

.recording-message,
.recording-save-message {
  color: var(--muted-strong);
  font-size: 10px;
  font-weight: 750;
}

.recording-message.error,
.recording-save-message.error {
  color: var(--danger);
}

.recording-local-note {
  color: var(--muted);
  font-size: 9px;
}

@keyframes recording-pulse {
  70% {
    box-shadow: 0 0 0 7px transparent;
  }

  100% {
    box-shadow: 0 0 0 0 transparent;
  }
}

.next-step-control {
  display: flex;
  max-width: min(430px, 70%);
  align-items: flex-end;
  flex-direction: column;
  gap: 7px;
}

.next-step-lock-hint {
  margin: 0;
  color: var(--warning);
  font-size: 10px;
  font-weight: 750;
  line-height: 1.45;
  text-align: right;
}

.next-step-lock-hint span {
  margin-right: 4px;
}

.next-step-control .button {
  width: fit-content;
}

.runtime-navigation {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-top: 16px;
}

.coach-panel {
  position: sticky;
  top: var(--topbar);
  height: calc(100vh - var(--topbar));
  overflow: auto;
  padding: 20px 16px;
  border-left: 1px solid var(--line);
  color: #fff;
  background: var(--coach-bg);
  scrollbar-width: thin;
}

.coach-card {
  padding: 17px;
  border: 1px solid var(--coach-line);
  border-radius: 20px;
  color: var(--text);
  background: var(--coach-card);
  box-shadow: 0 15px 35px rgba(0, 42, 100, .18);
}

.coach-avatar {
  display: grid;
  width: 68px;
  height: 68px;
  margin: 0 auto;
  place-items: center;
  border-radius: 22px;
  color: var(--primary);
  background: var(--primary-soft);
  font-size: 32px;
}

.coach-card h2 {
  margin: 9px 0 1px;
  color: var(--text-strong);
  font-size: 17px;
  text-align: center;
}

.coach-speech {
  margin-top: 13px;
  padding: 13px;
  border-radius: 13px;
  color: var(--muted-strong);
  background: var(--primary-soft);
  font-size: 14px;
  line-height: 1.65;
}

.coach-speech-button {
  width: 100%;
  margin-top: 8px;
  border-color: var(--line);
  color: var(--primary);
  background: var(--surface-soft);
}

.coach-ready {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 11px;
  padding: 9px 10px;
  border: 1px solid var(--line);
  border-radius: 11px;
  color: var(--muted);
  background: var(--surface-soft);
  font-size: 12px;
  line-height: 1.45;
}

.coach-ready span:first-child {
  width: 7px;
  height: 7px;
  flex: 0 0 auto;
  border-radius: 50%;
  background: var(--warning);
}

.coach-ready:not(.offline) span:first-child {
  background: var(--success);
}

.coach-ready.offline span:first-child {
  background: var(--danger);
}

.coach-progress {
  margin: 18px 2px;
}

.coach-progress-label {
  display: flex;
  justify-content: space-between;
  margin-bottom: 7px;
  font-size: 13px;
  font-weight: 850;
}

.coach-progress .progress-track {
  background: rgba(255, 255, 255, .22);
}

.coach-progress .progress-fill {
  background: #fff;
}

.coach-section-title {
  margin: 17px 2px 8px;
  font-size: 14px;
}

.coach-tips {
  display: grid;
  gap: 7px;
}

.coach-tip {
  width: 100%;
  padding: 10px 11px;
  border: 1px solid rgba(255, 255, 255, .22);
  border-radius: 11px;
  color: #fff;
  background: rgba(255, 255, 255, .09);
  font-size: 13px;
  font-weight: 750;
  line-height: 1.45;
  text-align: left;
}

.coach-tip:hover {
  background: rgba(255, 255, 255, .15);
}

.coach-detail {
  margin-top: 8px;
  padding: 11px;
  border: 1px solid rgba(255, 255, 255, .18);
  border-radius: 11px;
  color: rgba(255, 255, 255, .88);
  background: rgba(0, 0, 0, .09);
  font-size: 13px;
  line-height: 1.6;
}

.coach-chat {
  margin-top: 17px;
  padding-top: 16px;
  border-top: 1px solid rgba(255, 255, 255, .16);
}

.coach-action-context {
  display: grid;
  min-width: 0;
  align-items: center;
  margin: 9px 0;
  padding: 9px 10px;
  border: 1px solid rgba(255, 255, 255, .24);
  border-radius: 11px;
  background: rgba(255, 255, 255, .1);
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 7px;
}

.coach-action-context span {
  color: rgba(255, 255, 255, .62);
  font-size: 11px;
  font-weight: 800;
}

.coach-action-context strong {
  overflow: hidden;
  color: #fff;
  font-size: 12px;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.coach-action-context button {
  display: grid;
  width: 24px;
  height: 24px;
  padding: 0;
  place-items: center;
  border: 1px solid rgba(255, 255, 255, .22);
  border-radius: 8px;
  color: #fff;
  background: transparent;
}

.coach-chat-heading {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 9px;
}

.coach-chat-heading h3 {
  margin: 0;
  font-size: 15px;
}

.coach-chat-heading span {
  color: rgba(255, 255, 255, .62);
  font-size: 11px;
  font-weight: 800;
}

.coach-chat-log {
  display: grid;
  max-height: 310px;
  gap: 8px;
  overflow-y: auto;
  padding: 2px 3px 7px 0;
  scrollbar-color: rgba(255, 255, 255, .25) transparent;
  scrollbar-width: thin;
}

.coach-chat-empty {
  padding: 17px 12px;
  border: 1px dashed rgba(255, 255, 255, .24);
  border-radius: 13px;
  color: rgba(255, 255, 255, .72);
  background: rgba(255, 255, 255, .06);
  text-align: center;
}

.coach-chat-empty > span {
  display: block;
  margin-bottom: 5px;
  color: #8ebcff;
  font-size: 21px;
}

.coach-chat-empty strong {
  display: block;
  color: #fff;
  font-size: 13px;
}

.coach-chat-empty p {
  margin: 4px 0 0;
  font-size: 12px;
  line-height: 1.55;
}

.coach-message {
  max-width: 94%;
  padding: 9px 10px;
  border: 1px solid rgba(255, 255, 255, .15);
  border-radius: 12px 12px 12px 4px;
  background: rgba(255, 255, 255, .09);
}

.coach-message.learner {
  margin-left: auto;
  border-color: rgba(123, 181, 255, .38);
  border-radius: 12px 12px 4px 12px;
  background: rgba(68, 135, 224, .28);
}

.coach-message-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 6px;
  margin-bottom: 4px;
  font-size: 11px;
}

.coach-message-meta strong { color: #fff; }
.coach-message-meta span { color: rgba(255, 255, 255, .58); }

.coach-message p {
  margin: 0;
  color: rgba(255, 255, 255, .9);
  font-size: 13px;
  line-height: 1.6;
  overflow-wrap: anywhere;
  white-space: pre-wrap;
}

.coach-chat-form {
  display: grid;
  gap: 8px;
  margin-top: 10px;
}

.coach-chat-form label {
  display: grid;
  gap: 4px;
}

.coach-chat-form label > span {
  color: rgba(255, 255, 255, .7);
  font-size: 11px;
  font-weight: 800;
}

.coach-chat-form select,
.coach-chat-form textarea {
  width: 100%;
  border: 1px solid rgba(255, 255, 255, .2);
  border-radius: 10px;
  outline: none;
  color: #fff;
  background: rgba(255, 255, 255, .09);
  font-size: 13px;
}

.coach-chat-form select {
  min-height: 35px;
  padding: 0 9px;
  color-scheme: dark;
}

.coach-chat-form textarea {
  min-height: 84px;
  padding: 9px 10px;
  line-height: 1.55;
  resize: vertical;
}

.coach-chat-form textarea::placeholder { color: rgba(255, 255, 255, .42); }

.coach-chat-form select:focus,
.coach-chat-form textarea:focus {
  border-color: #80b8ff;
  box-shadow: 0 0 0 3px rgba(105, 169, 255, .17);
}

.coach-chat-form :disabled { cursor: not-allowed; opacity: .55; }

.coach-send {
  display: flex;
  min-height: 38px;
  align-items: center;
  justify-content: center;
  gap: 7px;
  padding: 8px 11px;
  border: 0;
  border-radius: 10px;
  color: #123455;
  background: #fff;
  font-size: 13px;
  font-weight: 900;
}

.coach-send .spinner {
  width: 14px;
  height: 14px;
  border-width: 2px;
}

.coach-data-notice,
.coach-chat-error {
  margin: 8px 1px 0;
  font-size: 11px;
  line-height: 1.55;
}

.coach-data-notice { color: rgba(255, 255, 255, .55); }
.coach-chat-error { color: #ffc4cc; }

.busy-overlay {
  position: fixed;
  inset: 0;
  z-index: 120;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  color: var(--muted-strong);
  background: color-mix(in srgb, var(--canvas) 76%, transparent);
  font-size: 12px;
  font-weight: 800;
  backdrop-filter: blur(6px);
}

.spinner {
  width: 23px;
  height: 23px;
  border: 3px solid color-mix(in srgb, var(--primary) 18%, transparent);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin .75s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.toast {
  position: fixed;
  right: 22px;
  bottom: max(22px, env(safe-area-inset-bottom));
  z-index: 140;
  max-width: min(390px, calc(100% - 32px));
  padding: 12px 16px;
  border: 1px solid rgba(255, 255, 255, .13);
  border-radius: 13px;
  color: #fff;
  background: #173452;
  box-shadow: 0 14px 34px rgba(0, 0, 0, .23);
  font-size: 12px;
  font-weight: 750;
  opacity: 0;
  pointer-events: none;
  transform: translateY(14px);
  transition: opacity .2s ease, transform .2s ease;
}

.toast.show {
  opacity: 1;
  transform: none;
}

.toast.error {
  background: #8d2e3b;
}

.dialog-backdrop {
  position: fixed;
  inset: 0;
  z-index: 160;
  display: grid;
  padding: 20px;
  place-items: center;
  background: rgba(3, 13, 27, .64);
  backdrop-filter: blur(5px);
}

.dialog {
  width: min(520px, 100%);
  max-height: min(680px, 88vh);
  overflow: auto;
  padding: 23px;
  border: 1px solid var(--line);
  border-radius: 22px;
  color: var(--text);
  background: var(--surface-raised);
  box-shadow: 0 24px 70px rgba(0, 0, 0, .33);
}

.dialog h2 {
  margin: 0 0 7px;
  color: var(--text-strong);
  font-size: 20px;
}

.dialog p {
  margin: 0;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.65;
}

.dialog-actions {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  margin-top: 19px;
}

.skeleton {
  overflow: hidden;
  border-radius: 10px;
  color: transparent !important;
  background: linear-gradient(100deg, var(--surface-soft) 25%, var(--surface-tint) 42%, var(--surface-soft) 60%);
  background-size: 200% 100%;
  animation: shimmer 1.3s infinite linear;
}

@keyframes shimmer {
  to { background-position-x: -200%; }
}

@media (max-width: 1180px) {
  .learner-runtime {
    grid-template-columns: 226px minmax(0, 1fr);
  }

  .coach-panel {
    position: relative;
    top: auto;
    height: auto;
    grid-column: 1 / -1;
  }

  .coach-panel-inner {
    display: grid;
    max-width: 920px;
    margin: 0 auto;
    grid-template-columns: minmax(250px, .7fr) minmax(0, 1.3fr);
    gap: 18px;
  }

  .coach-progress {
    margin-top: 0;
  }
}

@media (max-width: 900px) {
  .auth-layout {
    padding-top: 20px;
    grid-template-columns: 1fr;
    gap: 42px;
  }

  .auth-intro {
    text-align: center;
  }

  .auth-intro > p {
    margin-inline: auto;
  }

  .auth-benefits {
    text-align: left;
  }

  .auth-card-wrap {
    justify-self: center;
  }

  .redeem-panel,
  .class-hero {
    grid-template-columns: 1fr;
  }

  .class-grid {
    grid-template-columns: 1fr;
  }

  .coach-panel {
    border-left: 0;
  }

  .coach-panel-inner {
    grid-template-columns: 1fr 1fr;
  }

  .runtime-main {
    padding-top: 23px;
  }

  .experience-workspace.layout-split_left,
  .experience-workspace.layout-split_right {
    grid-template-columns: minmax(0, 1fr);
  }

  .experience-workspace.layout-split_right .activity-card {
    order: 0;
  }

  .generated-image-workspace {
    grid-template-columns: 1fr;
  }

  .generated-image-workspace > .privacy-note {
    grid-column: auto;
  }

  .header-progress {
    margin-left: 10px;
  }
}

@media (max-width: 680px) {
  :root {
    --topbar: 64px;
  }

  .auth-topbar,
  .auth-layout,
  .dashboard,
  .class-page {
    width: min(100% - 28px, 1240px);
  }

  .auth-topbar {
    height: 70px;
  }

  .auth-layout {
    min-height: calc(100vh - 70px);
    padding: 26px 0 52px;
  }

  .auth-intro h1 {
    font-size: 36px;
  }

  .auth-intro > p {
    font-size: 14px;
  }

  .auth-benefits {
    grid-template-columns: 1fr;
  }

  .auth-benefits > div {
    grid-template-columns: 37px 1fr;
    align-items: center;
  }

  .auth-benefits > div > span {
    grid-row: 1 / 3;
    margin: 0;
  }

  .auth-card {
    padding: 22px;
    border-radius: 23px;
  }

  .app-topbar {
    padding: 0 12px;
  }

  .desktop-brand,
  .user-label,
  .header-progress {
    display: none;
  }

  .brand-mark {
    width: 39px;
    height: 39px;
    border-radius: 13px;
  }

  .dashboard,
  .class-page {
    padding: 28px 0 55px;
  }

  .page-heading {
    display: block;
  }

  .page-heading h1 {
    font-size: 29px;
  }

  .redeem-panel,
  .class-hero {
    padding: 20px;
  }

  .redeem-copy {
    align-items: flex-start;
  }

  .redeem-form {
    align-items: stretch;
    flex-direction: column;
  }

  .class-card-body {
    padding: 19px;
  }

  .course-row {
    padding: 14px;
    grid-template-columns: 42px minmax(0, 1fr) auto;
    gap: 11px;
  }

  .course-number {
    width: 42px;
    height: 42px;
  }

  .course-row-progress,
  .course-row-side .status-badge {
    display: none;
  }

  .runtime-main {
    padding: 20px 13px 38px;
  }

  .runtime-heading {
    display: block;
  }

  .widget-code {
    margin-top: 10px;
  }

  .slide-card {
    min-height: 220px;
  }

  .slide-placeholder {
    min-height: 230px;
  }

  .activity-card {
    padding: 18px;
  }

  .experience-main:not(.slide-card) {
    min-height: 250px;
  }

  .experience-workspace.layout-focus .experience-main {
    min-height: 310px;
  }

  .ai-canvas-placeholder {
    padding: 31px 20px;
  }

  .experience-sequence-card {
    padding: 18px;
  }

  .experience-sequence-heading {
    margin-bottom: 14px;
  }

  .experience-sequence-heading p {
    max-width: 250px;
  }

  .experience-action,
  .experience-narration {
    align-items: start;
    grid-template-columns: 38px minmax(0, 1fr);
    gap: 10px;
  }

  .sequence-marker {
    width: 38px;
    height: 38px;
    border-radius: 12px;
  }

  .experience-action-controls,
  .narration-speak {
    grid-column: 2;
    justify-self: start;
  }

  .experience-action-controls {
    justify-content: flex-start;
    flex-wrap: wrap;
  }

  .presentation-recording {
    grid-column: 1 / -1;
    grid-template-columns: 1fr;
  }

  .presentation-recording > *,
  .recording-playback,
  .recording-ready-actions,
  .recording-message,
  .recording-save-message,
  .recording-local-note {
    grid-column: 1;
  }

  .recording-button {
    width: 100%;
  }

  .form-grid,
  .choice-grid {
    grid-template-columns: 1fr;
  }

  .runtime-navigation .button {
    flex: 1;
  }

  .runtime-navigation {
    align-items: flex-end;
  }

  .next-step-control {
    max-width: 68%;
    flex: 1;
  }

  .next-step-control .button {
    width: 100%;
    flex: none;
  }

  .coach-panel {
    padding: 18px 13px;
  }

  .coach-panel-inner {
    grid-template-columns: 1fr;
  }

  .toast {
    right: 16px;
    bottom: 16px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }
}

/* Dynamic Student Player */
.dsp-step { display: grid; gap: 1rem; }
.dsp-workspace { display: grid; gap: 1rem; }
.dsp-component {
  border: 1px solid var(--border-soft, rgba(15, 23, 42, .08));
  border-radius: 16px;
  padding: 1rem 1.1rem;
  background: var(--surface-elevated, #fff);
}
.dsp-component h3 { margin: 0 0 .5rem; font-size: 1.05rem; }
.dsp-input {
  width: 100%;
  min-height: 120px;
  margin-top: .75rem;
  border-radius: 12px;
  border: 1px solid var(--border-soft, rgba(15, 23, 42, .12));
  padding: .75rem .9rem;
  font: inherit;
  resize: vertical;
}
.dsp-choice-item { display: block; margin: .35rem 0; }
.dsp-slide-image { display: block; width: 100%; aspect-ratio: auto 16 / 9; border-radius: 12px; }
.dsp-slide-placeholder, .dsp-media-frame {
  min-height: 180px;
  display: grid;
  place-items: center;
  border-radius: 12px;
  background: var(--surface-muted, #eef4ff);
  color: var(--text-muted, #5b6475);
}
.dsp-muted { color: var(--text-muted, #5b6475); }
.dsp-step-head { display: grid; gap: .35rem; }
.dsp-step-head h2, .dsp-step-head p { margin: 0; }
.dsp-step-head small, .dsp-kicker {
  color: var(--primary, #4f46e5);
  font-size: .72rem;
  font-weight: 800;
  letter-spacing: .08em;
}
.dsp-component { display: grid; gap: .75rem; }
.dsp-component > p, .dsp-component ul { margin: 0; }
.dsp-readable-copy { color: var(--text-muted, #475569); line-height: 1.75; }
.dsp-readable-instruction {
  display: grid;
  gap: .65rem;
  padding: .9rem 1rem;
  border: 1px solid #dbe3ef;
  border-radius: 12px;
  background: #f8fafc;
  color: #25344d;
  font-size: .98rem;
  font-weight: 550;
  line-height: 1.75;
}
.dsp-instruction-paragraph,
.dsp-instruction-section,
.dsp-instruction-item { display: block; }
.dsp-instruction-gap { display: block; height: .15rem; }
.dsp-instruction-section { display: grid; gap: .25rem; padding-top: .15rem; }
.dsp-instruction-section > b { color: #1d4ed8; font-size: .9rem; }
.dsp-instruction-item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: .5rem;
  align-items: start;
  padding-left: .15rem;
}
.dsp-instruction-item > b { min-width: 1.5rem; color: #334155; }
.dsp-slide-subtitle { color: var(--text-muted, #5b6475); font-weight: 650; }
.dsp-slide-message { font-size: 1.02rem; font-weight: 700; line-height: 1.65; }
.dsp-slide-sections { display: grid; gap: .65rem; }
.dsp-slide-sections section { padding: .8rem .9rem; border: 1px solid #e2e8f0; border-radius: 12px; background: #f8fafc; }
.dsp-slide-sections h4 { margin: 0 0 .3rem; font-size: .96rem; }
.dsp-slide-sections p { margin: 0; line-height: 1.6; }
.dsp-key-points { display: grid; gap: .35rem; padding-left: 1.25rem; }
.dsp-callout { padding: .75rem .9rem; border-left: 4px solid #6d5dfc; border-radius: 8px; background: #f3f0ff; font-weight: 700; }
.dsp-check-prompt { padding-top: .65rem; border-top: 1px dashed #cbd5e1; }
.dsp-choice-help { color: var(--text-muted, #5b6475); }
.dsp-composite-source, .dsp-composite-modes { padding: .8rem .9rem; border: 1px solid #ddd6fe; border-radius: 12px; background: #faf8ff; }
.dsp-composite-source { display: grid; gap: .25rem; }
.dsp-composite-modes { display: flex; flex-wrap: wrap; gap: .75rem; }
.dsp-composite-modes legend { font-weight: 750; padding: 0 .25rem; }
.dsp-privacy-note { padding: .7rem .8rem; border-radius: 10px; background: #f1f5f9; color: var(--text-muted, #475569); font-size: .88rem; }
.dsp-media-placeholder {
  min-height: 92px;
  display: grid;
  place-items: center;
  padding: 1rem;
  border: 1px dashed #aab8cb;
  border-radius: 12px;
  background: var(--surface-muted, #f1f5f9);
  color: var(--text-muted, #475569);
  text-align: center;
}
.dsp-media video { width: 100%; max-height: 420px; border-radius: 12px; background: #07111f; }
.dsp-input.code { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; }
.dsp-input-lg { min-height: 170px; }
.dsp-form-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: .8rem; }
.dsp-field { display: grid; gap: .35rem; color: var(--text, #172033); font-size: .86rem; font-weight: 700; }
.dsp-field .dsp-input { min-height: auto; margin: 0; resize: vertical; }
.dsp-field textarea.dsp-input { min-height: 110px; }
.dsp-field small { color: var(--text-muted, #5b6475); font-size: .75rem; font-weight: 400; }
.dsp-support-chips { display: flex; flex-wrap: wrap; gap: .35rem; }
.dsp-support-chips button {
  padding: .35rem .6rem;
  border: 1px solid #c7d2fe;
  border-radius: 999px;
  color: #3730a3;
  background: #eef2ff;
  font: inherit;
  font-size: .76rem;
  font-weight: 750;
  cursor: pointer;
}
.dsp-support-chips button:hover, .dsp-support-chips button:focus-visible { border-color: #6366f1; background: #e0e7ff; }
.dsp-check { display: flex; gap: .55rem; align-items: center; min-height: 42px; }
.dsp-choice-list { display: grid; gap: .55rem; }
.dsp-choice-option {
  display: flex;
  gap: .65rem;
  align-items: flex-start;
  padding: .75rem;
  border: 1px solid var(--border-soft, rgba(15, 23, 42, .12));
  border-radius: 12px;
  cursor: pointer;
}
.dsp-choice-option span { display: grid; gap: .2rem; }
.dsp-choice-option small { color: var(--text-muted, #5b6475); }
.dsp-btn {
  width: max-content;
  border: 0;
  border-radius: 10px;
  padding: .7rem 1rem;
  color: #fff;
  background: var(--primary, #4f46e5);
  font: inherit;
  font-weight: 800;
  cursor: pointer;
}
.dsp-btn:disabled { opacity: .55; cursor: not-allowed; }
.dsp-btn-ai { background: linear-gradient(135deg, #6657df, #397ff2); }
.dsp-btn-complete { background: #15775f; }
.dsp-complete-hint, .dsp-submit-hint {
  margin: 0;
  color: var(--text-muted, #5b6475);
  font-size: .82rem;
  line-height: 1.45;
}
.dsp-submit-hint b { color: #172033; }
.dsp-requirements { padding-left: 1.15rem; color: var(--text-muted, #5b6475); }
.dsp-accessibility-note, .dsp-comparison-criteria { padding: .65rem .75rem; border-radius: 10px; background: #f8fafc; color: #475569; }
.dsp-safety-badges { display: flex; flex-wrap: wrap; gap: .45rem; }
.dsp-safety-badges span { padding: .4rem .65rem; border: 1px solid #9fdbc5; border-radius: 999px; background: #ecfdf5; color: #116149; font-size: .8rem; font-weight: 800; }
.dsp-example, .dsp-check-prompt {
  padding: .8rem;
  border-radius: 12px;
  background: var(--surface-muted, #eef4ff);
}
.dsp-compare-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: .8rem; }
.dsp-compare-grid .dsp-field:last-child { grid-column: 1 / -1; }
.dsp-artifact-comparison { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: .8rem; }
.dsp-artifact-comparison figure { display: grid; gap: .45rem; margin: 0; padding: .65rem; border: 1px solid #dbe3ef; border-radius: 14px; background: #f8fafc; }
.dsp-artifact-comparison img { width: 100%; aspect-ratio: 1 / 1; object-fit: contain; border-radius: 10px; background: #e8edf4; }
.dsp-artifact-comparison figcaption { display: grid; gap: .2rem; color: #475569; font-size: .76rem; }
.dsp-artifact-comparison figcaption b { color: #172033; font-size: .88rem; }
.dsp-contract-error, .dsp-contract-warning {
  border-color: #efb4b4;
  background: #fff5f5;
  color: #8f2424;
}
.dsp-loading { padding: 2rem; text-align: center; color: var(--text-muted, #5b6475); }
.dsp-slide-heading { display: grid; gap: .25rem; }
.dsp-slide-heading h3 { margin: 0; }
.dsp-slide-body {
  display: grid;
  gap: .75rem;
  padding-top: .1rem;
}
.dsp-action-completed {
  overflow: hidden;
  border: 1px solid #cfe6dc;
  border-radius: 14px;
  background: #f5fbf8;
}
.dsp-action-completed > summary {
  display: grid;
  min-height: 58px;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: .65rem;
  align-items: center;
  padding: .75rem .9rem;
  color: #173d31;
  font-size: .9rem;
  font-weight: 800;
  cursor: pointer;
  list-style: none;
}
.dsp-action-completed > summary::-webkit-details-marker { display: none; }
.dsp-action-completed > summary small { color: #5f7d72; font-size: .72rem; font-weight: 700; }
.dsp-action-completed-check {
  display: grid;
  width: 26px;
  height: 26px;
  place-items: center;
  border-radius: 999px;
  color: #fff;
  background: #17805f;
}
.dsp-action-completed[open] > summary { border-bottom: 1px solid #cfe6dc; }
.dsp-action-completed-content > .dsp-component {
  border: 0;
  border-radius: 0;
  background: transparent;
  box-shadow: none;
}
.dsp-complete {
  border-color: #b9ddce;
  background: linear-gradient(145deg, #f7fcfa, #eef9f4);
}
.dsp-complete-heading {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: .75rem;
  align-items: center;
}
.dsp-complete-heading h3 { margin: .1rem 0 0; }
.dsp-complete-icon {
  display: grid;
  width: 42px;
  height: 42px;
  place-items: center;
  border-radius: 13px;
  color: #fff;
  background: #17805f;
  font-size: 1.25rem;
  font-weight: 900;
}
.dsp-complete-message { margin: 0; color: #294b40; }
.dsp-complete-next {
  display: grid;
  gap: .3rem;
  padding: .85rem .95rem;
  border: 1px solid #c7d2fe;
  border-radius: 12px;
  background: #f7f8ff;
}
.dsp-complete-next > b { color: #4338ca; font-size: .8rem; }
.dsp-complete-next > p { margin: 0; color: #334155; }
.dsp-complete-finish { border-color: #a7dec9; background: #e9f8f1; }
.dsp-complete-finish > b { color: #15775f; }
.dsp-narration-inline {
  padding: .25rem .2rem;
  color: var(--text-muted, #475569);
  font-size: .92rem;
  line-height: 1.7;
}
.dsp-review-summary {
  display: grid;
  gap: .65rem;
  padding: .9rem 1rem;
  border: 1px solid #c7d2fe;
  border-radius: 12px;
  background: #f7f8ff;
}
.dsp-review-summary > strong { color: #312e81; }
.dsp-review-summary > p { margin: 0; color: #475569; line-height: 1.6; }
.dsp-review-sources { display: grid; gap: .35rem; margin: 0; padding-left: 1.2rem; color: #334155; }
.dsp-review-empty { margin: 0; color: #9f1239; }
@media (max-width: 720px) {
  .dsp-form-grid, .dsp-compare-grid, .dsp-artifact-comparison { grid-template-columns: 1fr; }
  .dsp-compare-grid .dsp-field:last-child { grid-column: auto; }
}

/* Private full-body clothing composite workspace */
.image-composite-workspace {
  display: grid;
  gap: 18px;
  outline: none;
}

.image-composite-workspace > header {
  display: grid;
  gap: 6px;
}

.image-composite-workspace > header h3,
.image-composite-workspace > header p,
.composite-results-heading h3,
.composite-result-card p,
.composite-source-summary p,
.composite-photo-picker p,
.composite-avatar-note p,
.composite-retention-note {
  margin: 0;
}

.composite-stage {
  width: max-content;
  padding: 4px 9px;
  border-radius: 999px;
  color: var(--primary-strong);
  background: var(--primary-soft);
  font-size: .75rem;
  font-weight: 800;
}

.composite-source-picker {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  padding: 0;
  border: 0;
}

.composite-source-picker legend {
  grid-column: 1 / -1;
  margin-bottom: 4px;
  font-size: .82rem;
  font-weight: 800;
}

.composite-source-option {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 2px 9px;
  align-items: start;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--surface-soft);
  cursor: pointer;
}

.composite-source-option.selected {
  border-color: var(--primary);
  box-shadow: 0 0 0 2px color-mix(in srgb, var(--primary) 14%, transparent);
  background: var(--primary-soft);
}

.composite-source-option input {
  margin: 4px 0 0;
}

.composite-source-option span {
  grid-column: 2;
  color: var(--muted);
  font-size: .78rem;
}

.composite-photo-picker,
.composite-source-summary,
.composite-avatar-note,
.composite-consent-box,
.composite-privacy-check {
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--surface-soft);
}

.composite-photo-picker,
.composite-source-summary {
  display: grid;
  gap: 10px;
  padding: 14px;
}

.composite-photo-picker p,
.composite-retention-note,
.composite-result-card small {
  color: var(--muted);
  font-size: .76rem;
}

.composite-reference-preview,
.composite-source-summary img {
  width: min(100%, 300px);
  max-height: 360px;
  object-fit: contain;
  border-radius: 12px;
  background: var(--canvas-deep);
}

.composite-avatar-note {
  display: flex;
  gap: 10px;
  align-items: center;
  padding: 14px;
  color: var(--muted-strong);
}

.composite-avatar-note > span {
  display: grid;
  width: 34px;
  height: 34px;
  flex: none;
  place-items: center;
  border-radius: 50%;
  color: var(--secondary);
  background: color-mix(in srgb, var(--secondary) 13%, transparent);
}

.composite-consent-box {
  display: grid;
  gap: 8px;
  padding: 13px 14px;
}

.composite-consent-box label,
.composite-privacy-check {
  display: flex;
  gap: 9px;
  align-items: flex-start;
  font-size: .8rem;
}

.composite-consent-box input,
.composite-privacy-check input {
  margin-top: 3px;
  flex: none;
}

.composite-prompt-field {
  display: grid;
  gap: 7px;
  font-weight: 800;
}

.composite-prompt-field textarea {
  width: 100%;
  min-height: 118px;
  padding: 12px 13px;
  resize: vertical;
  border: 1px solid var(--line-strong);
  border-radius: 12px;
  background: var(--surface);
  font-weight: 500;
  line-height: 1.55;
}

.composite-prompt-field textarea:focus {
  outline: 3px solid color-mix(in srgb, var(--primary) 18%, transparent);
  border-color: var(--primary);
}

.composite-privacy-check {
  padding: 12px 13px;
}

.composite-error {
  margin: 0;
  padding: 10px 12px;
  border-radius: 10px;
  color: var(--danger);
  background: var(--danger-soft);
  font-size: .82rem;
  font-weight: 700;
}

.composite-generate-button {
  justify-self: start;
}

.composite-results {
  display: grid;
  gap: 12px;
  margin-top: 4px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

.composite-results-heading {
  display: flex;
  gap: 12px;
  align-items: center;
  justify-content: space-between;
}

.composite-compare-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
}

.composite-compare-grid.has-revision {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.composite-result-card {
  display: grid;
  gap: 9px;
  align-content: start;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--surface-soft);
}

.composite-result-card > span {
  width: max-content;
  padding: 3px 8px;
  border-radius: 999px;
  color: var(--success);
  background: var(--success-soft);
  font-size: .72rem;
  font-weight: 800;
}

.composite-result-card img,
.composite-image-loading {
  width: 100%;
  aspect-ratio: 16 / 9;
  border-radius: 11px;
  background: var(--canvas-deep);
}

.composite-result-card img {
  object-fit: contain;
}

.composite-image-loading {
  display: grid;
  place-items: center;
  color: var(--muted);
  font-size: .78rem;
}

@media (max-width: 660px) {
  .composite-source-picker,
  .composite-compare-grid.has-revision {
    grid-template-columns: 1fr;
  }

  .composite-results-heading {
    align-items: flex-start;
    flex-direction: column;
  }

  .composite-generate-button {
    width: 100%;
  }
}

/* Student demo lesson-player skin. This scope intentionally leaves the
   temporary ticket gate and class list unchanged. */
body.lesson-mode {
  --canvas: #040a17;
  --canvas-deep: #030815;
  --surface: #0b1528;
  --surface-raised: #0f1b32;
  --surface-soft: #0a1427;
  --surface-tint: #12223d;
  --text: #e7eef8;
  --text-strong: #f5f8ff;
  --muted: #9cacbf;
  --muted-strong: #c6d2e0;
  --line: #21304a;
  --line-strong: #365071;
  --primary: #32dc80;
  --primary-strong: #68e9a1;
  --primary-soft: rgba(50, 220, 128, .13);
  --secondary: #4a78ff;
  --mint: #32dc80;
  --success: #32dc80;
  --success-soft: rgba(50, 220, 128, .13);
  --warning: #ffc85a;
  --warning-soft: rgba(255, 200, 90, .12);
  --danger: #ff7c88;
  --danger-soft: rgba(255, 107, 122, .12);
  --coach-bg: #0b1528;
  --coach-card: #0f1b32;
  --coach-line: #263955;
  --shadow-sm: 0 14px 34px rgba(0, 0, 0, .2);
  --shadow: 0 22px 60px rgba(0, 0, 0, .35);
  color: var(--text);
  background:
    radial-gradient(circle at 75% 0, #101c44 0, transparent 30rem),
    linear-gradient(135deg, #040a17, #030815 72%);
  background-attachment: fixed;
}

.lesson-mode .app-view {
  min-height: 100vh;
  background: transparent;
}

.lesson-mode .app-topbar {
  border-color: var(--line);
  color: var(--text);
  background: rgba(4, 10, 23, .9);
  box-shadow: 0 12px 34px rgba(0, 0, 0, .16);
}

.lesson-mode .app-topbar .brand,
.lesson-mode .app-topbar .user-chip {
  color: var(--text-strong);
}

.lesson-mode .app-topbar .brand-mark {
  background: linear-gradient(135deg, #32dc80, #17a861);
  box-shadow: 0 10px 24px rgba(24, 184, 101, .22);
}

.lesson-mode .header-progress .progress-track,
.lesson-mode .runtime-stage-progress .progress-track {
  background: #1b2940;
}

.lesson-mode .header-progress .progress-fill,
.lesson-mode .runtime-stage-progress .progress-fill {
  background: linear-gradient(90deg, #32dc80, #76e876);
}

.lesson-mode .learner-runtime.lesson-player {
  width: min(1580px, calc(100% - 32px));
  min-height: calc(100vh - var(--topbar));
  margin: 0 auto;
  padding: 20px 0 48px;
  align-items: start;
  grid-template-columns: minmax(210px, 235px) minmax(0, 1fr) minmax(270px, 300px);
  gap: 16px;
}

.lesson-mode .learner-runtime.lesson-player.course-intro-layout {
  grid-template-columns: minmax(210px, 235px) minmax(0, 1fr);
}

.lesson-mode .course-intro-stage {
  min-width: 0;
}

.lesson-mode .course-intro-stage .course-intro-shell {
  width: auto;
  margin: 0;
}

.lesson-mode .step-sidebar.lesson-nav,
.lesson-mode .coach-panel.avatar-coach {
  top: calc(var(--topbar) + 20px);
  height: calc(100vh - var(--topbar) - 40px);
  border: 1px solid var(--line);
  border-radius: 24px;
  background: linear-gradient(145deg, rgba(15, 27, 50, .97), rgba(8, 17, 34, .99));
  box-shadow: var(--shadow);
}

.lesson-mode .step-sidebar.lesson-nav {
  padding: 16px;
}

.lesson-mode .lesson-nav-head {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 3px 4px 15px;
  border-bottom: 1px solid var(--line);
}

.lesson-mode .lesson-teacher-mark {
  display: grid;
  width: 44px;
  height: 44px;
  flex: 0 0 auto;
  place-items: center;
  border: 1px solid rgba(78, 227, 143, .42);
  border-radius: 14px;
  color: #83efb1;
  background:
    radial-gradient(circle at 30% 25%, rgba(118, 232, 118, .36), transparent 42%),
    linear-gradient(145deg, #133728, #0d2035);
  font-size: 23px;
}

.lesson-mode .lesson-nav-head strong,
.lesson-mode .lesson-nav-head small {
  display: block;
}

.lesson-mode .lesson-nav-head strong {
  overflow: hidden;
  color: var(--text-strong);
  font-size: 14px;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.lesson-mode .lesson-nav-head small {
  margin-top: 2px;
  color: var(--muted);
  font-size: 11px;
}

.lesson-mode .sidebar-back {
  margin-top: 10px;
  padding: 10px 8px;
  color: #aebdd0;
}

.lesson-mode .sidebar-back:hover {
  color: #fff;
  background: #101d35;
}

.lesson-mode .sidebar-title {
  padding: 11px 8px 13px;
  border-color: var(--line);
}

.lesson-mode .sidebar-title h2 {
  color: #fff;
  font-size: 16px;
  line-height: 1.45;
}

.lesson-mode .sidebar-title p {
  color: #8192aa;
  font-size: 12px;
}

.lesson-mode .step-list {
  gap: 5px;
  margin-top: 11px;
}

.lesson-mode .step-button.lesson-step {
  min-height: 58px;
  padding: 11px 10px;
  border-radius: 15px;
  color: #aebdd0;
  grid-template-columns: 30px minmax(0, 1fr);
  gap: 10px;
}

.lesson-mode .step-button.lesson-step:not(:disabled):hover {
  background: #101d35;
}

.lesson-mode .step-button.lesson-step.active {
  border-color: #2b8f61;
  color: #fff;
  background: linear-gradient(135deg, rgba(50, 220, 128, .18), rgba(77, 87, 255, .1));
  box-shadow: inset 0 0 28px rgba(35, 216, 123, .05);
}

.lesson-mode .step-button.lesson-step .step-index {
  width: 28px;
  height: 28px;
  border: 0;
  border-radius: 50%;
  color: #d6e0ed;
  background: #182640;
}

.lesson-mode .step-button.lesson-step.active .step-index {
  color: #071225;
  background: #32dc80;
}

.lesson-mode .step-button.lesson-step.done:not(.active) .step-index {
  color: #88f1b6;
  background: #1d704b;
}

.lesson-mode .step-button.lesson-step.locked .step-index {
  color: #7b899d;
  background: #111d31;
}

.lesson-mode .step-copy strong {
  color: inherit;
  font-size: 14px;
}

.lesson-mode .step-copy small {
  margin-top: 3px;
  color: #8192aa;
  font-size: 11px;
  text-transform: none;
}

.lesson-mode .runtime-main.lesson-stage {
  min-width: 0;
  padding: 0;
}

.lesson-mode .runtime-inner {
  width: 100%;
  min-height: calc(100vh - var(--topbar) - 40px);
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: linear-gradient(145deg, rgba(15, 27, 50, .97), rgba(8, 17, 34, .99));
  box-shadow: var(--shadow);
}

.lesson-mode .runtime-heading.lesson-toolbar {
  min-height: 105px;
  align-items: center;
  margin: 0;
  padding: 18px 22px;
  border-bottom: 1px solid var(--line);
  background: rgba(10, 20, 39, .62);
}

.lesson-mode .runtime-heading-copy {
  min-width: 0;
}

.lesson-mode .runtime-heading-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  color: #b8c7da;
  font-size: 12px;
}

.lesson-mode .phase-pill {
  display: inline-flex;
  align-items: center;
  padding: 6px 10px;
  border: 1px solid rgba(50, 220, 128, .28);
  border-radius: 999px;
  color: #71e9a6;
  background: rgba(50, 220, 128, .1);
  font-size: 12px;
  font-weight: 900;
  text-transform: none;
}

.lesson-mode .runtime-heading h1 {
  margin: 9px 0 3px;
  color: #fff;
  font-size: clamp(23px, 2.2vw, 29px);
}

.lesson-mode .runtime-heading p {
  color: #aebdd0;
  font-size: 14px;
  line-height: 1.55;
}

.lesson-mode .runtime-stage-progress {
  display: flex;
  min-width: 175px;
  align-items: center;
  gap: 10px;
  color: #dce7f5;
  font-size: 13px;
}

.lesson-mode .runtime-stage-progress .progress-track {
  width: 130px;
  height: 7px;
}

.lesson-mode .runtime-inner > .experience-workspace,
.lesson-mode .runtime-inner > .dsp-step {
  margin: 22px;
}

.lesson-mode .runtime-inner > .experience-sequence-card {
  margin: 0 22px 22px;
}

.lesson-mode .runtime-inner > .slide-card {
  margin: 22px 22px 16px;
}

.lesson-mode .runtime-inner > .activity-card {
  margin: 0 22px 22px;
}

.lesson-mode .slide-card,
.lesson-mode .activity-card,
.lesson-mode .experience-main:not(.slide-card),
.lesson-mode .experience-sequence-card,
.lesson-mode .dsp-component {
  border-color: #263955;
  background: #0b172b;
  box-shadow: 0 10px 28px rgba(0, 0, 0, .18);
}

.lesson-mode .slide-card {
  padding: 12px;
  background:
    radial-gradient(circle at 70% 20%, rgba(75, 105, 255, .16), transparent 30%),
    #071122;
}

.lesson-mode .slide-card img {
  max-height: 560px;
  border-radius: 18px;
  background: #050c18;
}

.lesson-mode .slide-placeholder {
  min-height: 390px;
  color: #aebdd0;
  background:
    radial-gradient(circle at 70% 20%, rgba(75, 105, 255, .2), transparent 31%),
    linear-gradient(145deg, #101d37, #071122);
}

.lesson-mode .activity-card {
  padding: 22px;
}

.lesson-mode .activity-title h2,
.lesson-mode .experience-sequence-heading h2,
.lesson-mode .experience-action-copy h3,
.lesson-mode .dsp-step-head h2,
.lesson-mode .dsp-component h3 {
  color: #f5f8ff;
}

.lesson-mode .activity-title p,
.lesson-mode .experience-sequence-heading p,
.lesson-mode .experience-action-copy p,
.lesson-mode .dsp-readable-copy,
.lesson-mode .dsp-muted {
  color: #b7c7da;
}

.lesson-mode .widget-input,
.lesson-mode .widget-textarea,
.lesson-mode .widget-select,
.lesson-mode .dsp-input {
  border-color: #2d405e;
  color: #f5f8ff;
  background: #071225;
}

.lesson-mode .choice-button,
.lesson-mode .experience-action,
.lesson-mode .experience-narration,
.lesson-mode .generated-image-input-panel,
.lesson-mode .generated-image-output-panel,
.lesson-mode .generated-video-card,
.lesson-mode .composite-result-card {
  border-color: #263955;
  color: #e7eef8;
  background: #0d1a30;
}

.lesson-mode .choice-button.selected {
  border-color: #35d984;
  color: #fff;
  background: rgba(43, 197, 116, .16);
}

.lesson-mode .button.primary,
.lesson-mode .experience-action-button,
.lesson-mode .coach-send {
  color: #03150c;
  background: linear-gradient(135deg, #31df82, #159d5a);
  box-shadow: 0 10px 24px rgba(21, 157, 90, .2);
}

.lesson-mode .button.secondary,
.lesson-mode .action-complete-button,
.lesson-mode .narration-speak {
  border-color: #2a3c59;
  color: #dce8f6;
  background: #0b172b;
}

.lesson-mode .runtime-navigation {
  min-height: 76px;
  margin: 0;
  padding: 16px 20px;
  border-top: 1px solid var(--line);
  background: rgba(7, 15, 30, .46);
}

.lesson-mode .runtime-step-dots {
  display: flex;
  max-width: 35%;
  align-items: center;
  justify-content: center;
  gap: 6px;
  overflow: hidden;
}

.lesson-mode .runtime-step-dots span {
  width: 7px;
  height: 7px;
  flex: 0 0 auto;
  border-radius: 50%;
  background: #31415c;
}

.lesson-mode .runtime-step-dots span.done {
  background: #1d704b;
}

.lesson-mode .runtime-step-dots span.active {
  width: 22px;
  border-radius: 999px;
  background: #32dc80;
}

.lesson-mode .coach-panel.avatar-coach {
  height: auto;
  min-height: 0;
  overflow: visible;
  padding: 18px;
  border-left: 1px solid var(--line);
  color: #e7eef8;
}

.lesson-mode .coach-card {
  padding: 0;
  border: 0;
  color: #e7eef8;
  background: transparent;
  box-shadow: none;
}

.lesson-mode .coach-panel-inner {
  display: block;
}

.lesson-mode .coach-avatar-stage {
  position: relative;
  height: 210px;
  overflow: hidden;
  border: 1px solid #263955;
  border-radius: 20px;
  background:
    radial-gradient(circle at 50% 30%, rgba(61, 218, 132, .22), transparent 30%),
    radial-gradient(circle at 80% 75%, rgba(74, 120, 255, .23), transparent 35%),
    #081326;
}

.lesson-mode .coach-avatar-stage::before,
.lesson-mode .coach-avatar-stage::after {
  position: absolute;
  border: 1px solid rgba(92, 228, 151, .16);
  border-radius: 50%;
  content: "";
}

.lesson-mode .coach-avatar-stage::before {
  width: 180px;
  height: 180px;
  top: 31px;
  left: calc(50% - 90px);
}

.lesson-mode .coach-avatar-stage::after {
  width: 122px;
  height: 122px;
  top: 60px;
  left: calc(50% - 61px);
}

.lesson-mode .coach-avatar {
  position: absolute;
  inset: 0;
  z-index: 1;
  display: grid;
  width: auto;
  height: auto;
  margin: 0;
  place-items: center;
  border-radius: 0;
  color: #82edb0;
  background: transparent;
}

.lesson-mode .coach-avatar span {
  display: grid;
  width: 88px;
  height: 88px;
  place-items: center;
  border: 1px solid rgba(113, 233, 166, .38);
  border-radius: 30px;
  background: rgba(10, 35, 35, .72);
  box-shadow: 0 22px 48px rgba(0, 0, 0, .32);
  font-size: 46px;
  backdrop-filter: blur(8px);
}

.lesson-mode .coach-avatar-video {
  position: absolute;
  inset: 0;
  z-index: 2;
  width: 100%;
  height: 100%;
  object-fit: cover;
  background: transparent;
}

.lesson-mode .coach-card.is-speaking .coach-avatar-stage {
  border-color: #55e19c;
  box-shadow: 0 0 0 3px rgba(85, 225, 156, .12), 0 18px 44px rgba(0, 0, 0, .3);
}

.lesson-mode .coach-card.is-speaking .coach-speech {
  border-color: rgba(85, 225, 156, .62);
}


.lesson-mode .app-topbar .theme-toggle {
  display: none;
}


.lesson-mode .coach-card h2 {
  margin: 14px 0 3px;
  color: #fff;
  font-size: 18px;
  text-align: left;
}


.lesson-mode .coach-speech {
  max-height: 300px;
  margin-top: 13px;
  overflow: auto;
  padding: 14px;
  border: 1px solid #253754;
  border-radius: 16px;
  color: #d2deec;
  background: #0a1427;
  font-size: 14px;
  line-height: 1.65;
  overflow-wrap: anywhere;
  white-space: pre-wrap;
}

.lesson-mode .coach-primary-actions {
  display: grid;
  margin-top: 12px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 9px;
}

.lesson-mode .coach-primary-button {
  display: flex;
  min-height: 46px;
  align-items: center;
  justify-content: center;
  gap: 7px;
  padding: 10px 12px;
  border: 1px solid #304564;
  border-radius: 13px;
  color: #e7eef8;
  background: #0a1427;
  font: inherit;
  font-size: 13px;
  font-weight: 850;
  cursor: pointer;
  transition: border-color .16s ease, background .16s ease, transform .16s ease;
}

.lesson-mode .coach-primary-button:hover:not(:disabled) {
  border-color: #57dfa0;
  background: #112039;
  transform: translateY(-1px);
}

.lesson-mode .coach-primary-button.question {
  border-color: #6a5cf3;
  color: #fff;
  background: linear-gradient(135deg, #5146e7, #8b38f4);
}

.lesson-mode .coach-primary-button.speaking {
  border-color: #55e19c;
  color: #74edac;
}

.lesson-mode .coach-primary-button:disabled {
  cursor: not-allowed;
  opacity: .48;
}

.coach-question-backdrop {
  position: fixed;
  inset: 0;
  z-index: 220;
  display: grid;
  overflow: auto;
  padding: 20px;
  place-items: center;
  background: rgba(2, 8, 23, .76);
  backdrop-filter: blur(10px);
}

.coach-question-dialog {
  width: min(100%, 560px);
  padding: 24px;
  border: 1px solid #263b5e;
  border-radius: 22px;
  color: #f7f9ff;
  background:
    radial-gradient(circle at 100% 0, rgba(85, 46, 220, .18), transparent 35%),
    #081429;
  box-shadow: 0 30px 85px rgba(0, 0, 0, .48);
}

.coach-question-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 20px;
}

.coach-question-head span {
  display: block;
  margin-bottom: 6px;
  color: #41e99a;
  font-size: 11px;
  font-weight: 950;
  letter-spacing: .14em;
}

.coach-question-head h2 {
  margin: 0;
  color: #fff;
  font-size: clamp(21px, 3vw, 28px);
  line-height: 1.18;
}

.coach-question-head button {
  display: grid;
  width: 40px;
  height: 40px;
  flex: 0 0 auto;
  padding: 0;
  place-items: center;
  border: 0;
  border-radius: 14px;
  color: #fff;
  background: transparent;
  font: inherit;
  font-size: 34px;
  font-weight: 300;
  line-height: 1;
  cursor: pointer;
}

.coach-question-head button:hover {
  background: rgba(255, 255, 255, .08);
}

.coach-question-form {
  display: grid;
  margin-top: 22px;
  gap: 10px;
}

.coach-question-form label {
  color: #f6f8ff;
  font-size: 16px;
  font-weight: 900;
}

.coach-question-form textarea {
  width: 100%;
  min-height: 120px;
  max-height: 220px;
  padding: 14px 16px;
  resize: vertical;
  border: 2px solid #2a3d60;
  border-radius: 16px;
  outline: none;
  color: #fff;
  background: #061125;
  font: inherit;
  font-size: 15px;
  line-height: 1.65;
}

.coach-question-form textarea::placeholder {
  color: #7f8999;
}

.coach-question-form textarea:focus {
  border-color: #7b5cf6;
  box-shadow: 0 0 0 4px rgba(123, 92, 246, .18);
}

.coach-question-form textarea:disabled {
  cursor: wait;
  opacity: .64;
}

.coach-question-error,
.coach-question-notice {
  margin: 0;
  line-height: 1.55;
}

.coach-question-error {
  padding: 10px 12px;
  border-radius: 10px;
  color: #ffd2d9;
  background: rgba(190, 35, 64, .24);
  font-size: 13px;
  font-weight: 750;
}

.coach-question-error:empty {
  display: none;
}

.coach-question-notice {
  color: #9dabc0;
  font-size: 12px;
}

.coach-question-actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  margin-top: 5px;
  gap: 9px;
}

.coach-question-actions button {
  min-height: 44px;
  padding: 9px 18px;
  border-radius: 14px;
  font: inherit;
  font-size: 14px;
  font-weight: 900;
  cursor: pointer;
}

.coach-question-cancel {
  border: 1px solid #304360;
  color: #e9effa;
  background: transparent;
}

.coach-question-send {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 5px;
  border: 0;
  color: #fff;
  background: linear-gradient(135deg, #543bf2, #b52df5);
  box-shadow: 0 12px 28px rgba(108, 51, 235, .3);
}

.coach-question-actions button:hover:not(:disabled) {
  filter: brightness(1.1);
  transform: translateY(-1px);
}

.coach-question-actions button:disabled {
  cursor: wait;
  opacity: .62;
}

.lesson-mode .coach-speech-button,
.lesson-mode .coach-ready {
  border-color: #263955;
  color: #dce8f6;
  background: #0a1427;
}

.lesson-mode .coach-progress .progress-track {
  background: #1b2940;
}

.lesson-mode .coach-progress .progress-fill {
  background: linear-gradient(90deg, #32dc80, #76e876);
}

.lesson-mode .coach-tip,
.lesson-mode .coach-detail,
.lesson-mode .coach-action-context,
.lesson-mode .coach-chat-empty,
.lesson-mode .coach-message,
.lesson-mode .coach-chat-form select,
.lesson-mode .coach-chat-form textarea {
  border-color: #2a3c59;
  color: #dce8f6;
  background: #0a1427;
}

.lesson-mode .coach-chat,
.lesson-mode .coach-section-title {
  border-color: #263955;
  color: #f5f8ff;
}

.lesson-mode .coach-chat-heading span,
.lesson-mode .coach-chat-form label > span,
.lesson-mode .coach-data-notice {
  color: #9cacbf;
}

.lesson-mode .dsp-readable-instruction,
.lesson-mode .dsp-slide-sections section,
.lesson-mode .dsp-composite-source,
.lesson-mode .dsp-composite-modes,
.lesson-mode .dsp-privacy-note,
.lesson-mode .dsp-media-placeholder,
.lesson-mode .dsp-callout {
  border-color: #2d405e;
  color: #dbe7f5;
  background: #0a1427;
}

.lesson-mode .dsp-instruction-section > b,
.lesson-mode .dsp-kicker,
.lesson-mode .dsp-step-head small {
  color: #71e9a6;
}

.lesson-mode .dsp-action-completed {
  border-color: #2d405e;
  background: #091426;
}

.lesson-mode .dsp-action-completed > summary {
  color: #e5eef9;
}

.lesson-mode .dsp-action-completed > summary small {
  color: #91a3ba;
}

.lesson-mode .dsp-action-completed[open] > summary {
  border-color: #2d405e;
}

.lesson-mode .dsp-complete {
  border-color: #285b49;
  background: linear-gradient(145deg, #0b1d25, #0b172b);
}

.lesson-mode .dsp-complete-message { color: #c8d8d2; }
.lesson-mode .dsp-complete-next { border-color: #344b78; background: #0b1830; }
.lesson-mode .dsp-complete-next > b { color: #a7b8ff; }
.lesson-mode .dsp-complete-next > p { color: #dce8f6; }
.lesson-mode .dsp-complete-finish { border-color: #285b49; background: #0b241d; }
.lesson-mode .dsp-complete-finish > b { color: #71e9a6; }
.lesson-mode .dsp-narration-inline { color: #aebed1; }

@media (max-width: 1240px) {
  .lesson-mode .learner-runtime.lesson-player {
    grid-template-columns: 210px minmax(0, 1fr);
  }

  .lesson-mode .coach-panel.avatar-coach {
    position: relative;
    top: auto;
    width: 100%;
    height: auto;
    grid-column: 1 / -1;
  }

  .lesson-mode .coach-panel-inner {
    display: block;
    max-width: 520px;
    margin: 0 auto;
  }
}

@media (max-width: 760px) {
  .lesson-mode .learner-runtime.lesson-player {
    width: min(100% - 20px, 680px);
    padding-top: 10px;
    grid-template-columns: 1fr;
  }

  .lesson-mode .learner-runtime.lesson-player.course-intro-layout {
    grid-template-columns: 1fr;
  }

  .lesson-mode .step-sidebar.lesson-nav {
    position: relative;
    top: auto;
    height: auto;
  }

  .lesson-mode .step-list {
    max-height: 270px;
    overflow: auto;
  }

  .lesson-mode .runtime-inner {
    min-height: 0;
  }

  .lesson-mode .runtime-heading.lesson-toolbar {
    display: grid;
  }

  .lesson-mode .runtime-stage-progress {
    width: 100%;
  }

  .lesson-mode .runtime-stage-progress .progress-track {
    width: auto;
    flex: 1;
  }

  .lesson-mode .runtime-inner > .experience-workspace,
  .lesson-mode .runtime-inner > .dsp-step {
    margin: 14px;
  }

  .lesson-mode .runtime-inner > .experience-sequence-card,
  .lesson-mode .runtime-inner > .activity-card {
    margin: 0 14px 14px;
  }

  .lesson-mode .runtime-inner > .slide-card {
    margin: 14px 14px 10px;
  }

  .lesson-mode .coach-panel-inner {
    max-width: none;
  }

  .coach-question-backdrop {
    align-items: end;
    padding: 12px;
  }

  .coach-question-dialog {
    padding: 20px 16px 16px;
    border-radius: 20px;
  }

  .coach-question-form {
    margin-top: 18px;
  }

  .coach-question-form label {
    font-size: 17px;
  }

  .coach-question-form textarea {
    min-height: 115px;
    padding: 13px;
    border-radius: 14px;
    font-size: 14px;
  }

  .coach-question-actions button {
    min-height: 42px;
    padding: 9px 15px;
    font-size: 14px;
  }

  .lesson-mode .runtime-step-dots {
    display: none;
  }
}

@media print {
  .app-topbar,
  .step-sidebar,
  .coach-panel,
  .runtime-navigation,
  .toast {
    display: none !important;
  }

  .learner-runtime {
    display: block;
  }

  .runtime-main {
    padding: 0;
  }

  .slide-card,
  .activity-card {
    box-shadow: none;
  }
}

/* GPC planning brief: reduce reading load with a guided, single-column worksheet. */
.lesson-mode .dsp-planning-brief {
  gap: 0;
  overflow: hidden;
  padding: 0;
  border-color: rgba(120, 144, 180, .2);
  border-radius: 24px;
  background: linear-gradient(180deg, rgba(19, 34, 58, .98), rgba(10, 22, 40, .98));
  box-shadow: 0 22px 55px rgba(0, 0, 0, .22);
}

.lesson-mode .dsp-form-hero {
  display: grid;
  gap: 12px;
  padding: 26px 28px 24px;
  border-bottom: 1px solid rgba(148, 163, 184, .16);
  background:
    radial-gradient(circle at 92% 0, rgba(72, 214, 136, .16), transparent 35%),
    linear-gradient(135deg, rgba(49, 78, 125, .28), transparent 64%);
}

.lesson-mode .dsp-form-hero h3 {
  margin: 0;
  color: #f8fbff;
  font-size: clamp(22px, 2vw, 28px);
  letter-spacing: -.03em;
}

.lesson-mode .dsp-form-hero > p {
  max-width: 720px;
  margin: 0;
  color: #c7d4e7;
  font-size: 15px;
  line-height: 1.75;
}

.lesson-mode .dsp-form-summary {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.lesson-mode .dsp-form-summary span {
  padding: 7px 11px;
  border: 1px solid rgba(122, 232, 171, .22);
  border-radius: 999px;
  color: #c9f6dc;
  background: rgba(43, 183, 107, .1);
  font-size: 12px;
  font-weight: 750;
}

.lesson-mode .dsp-form-hero details {
  width: fit-content;
  max-width: 100%;
  color: #aebdd1;
  font-size: 13px;
}

.lesson-mode .dsp-form-hero summary {
  cursor: pointer;
  font-weight: 750;
}

.lesson-mode .dsp-form-hero details p {
  max-width: 760px;
  margin: 12px 0 0;
  padding: 14px 16px;
  border-radius: 12px;
  color: #c7d4e7;
  background: rgba(3, 10, 22, .38);
}

.lesson-mode .dsp-form-flow {
  display: grid;
  gap: 18px;
  padding: 24px 28px 28px;
}

.lesson-mode .dsp-form-section {
  display: grid;
  gap: 13px;
}

.lesson-mode .dsp-form-section > header {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 12px;
  padding: 0 2px;
}

.lesson-mode .dsp-form-section h4,
.lesson-mode .dsp-form-section p {
  margin: 0;
}

.lesson-mode .dsp-form-section h4 {
  color: #f0f6ff;
  font-size: 16px;
}

.lesson-mode .dsp-form-section > header p {
  color: #8293aa;
  font-size: 12px;
  text-align: right;
}

.lesson-mode .dsp-form-section-fields {
  display: grid;
  gap: 12px;
}

.lesson-mode .dsp-form-field {
  display: grid;
  gap: 10px;
  min-width: 0;
  margin: 0;
  padding: 18px;
  border: 1px solid rgba(148, 163, 184, .16);
  border-radius: 17px;
  color: #eaf1fb;
  background: rgba(255, 255, 255, .035);
  transition: border-color .18s ease, background .18s ease, box-shadow .18s ease;
}

.lesson-mode .dsp-form-field:focus-within {
  border-color: rgba(75, 222, 141, .64);
  background: rgba(63, 212, 131, .055);
  box-shadow: 0 0 0 3px rgba(63, 212, 131, .08);
}

.lesson-mode .dsp-field-heading,
.lesson-mode .dsp-form-field legend {
  display: flex;
  width: 100%;
  align-items: center;
  gap: 11px;
  color: #f3f7fd;
}

.lesson-mode .dsp-field-heading > span:last-child,
.lesson-mode .dsp-form-field legend > span:last-child {
  display: flex;
  min-width: 0;
  flex: 1;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.lesson-mode .dsp-field-heading b,
.lesson-mode .dsp-form-field legend b {
  font-size: 14px;
}

.lesson-mode .dsp-field-heading small,
.lesson-mode .dsp-form-field legend small {
  color: #71849d;
  font-size: 11px;
  font-weight: 700;
}

.lesson-mode .dsp-field-number {
  display: grid;
  width: 30px;
  height: 30px;
  flex: 0 0 auto;
  place-items: center;
  border-radius: 10px;
  color: #7eeab0;
  background: rgba(55, 211, 126, .12);
  font-size: 11px;
  font-weight: 900;
}

.lesson-mode .dsp-form-field .dsp-field-help {
  margin: 0 0 0 41px;
  color: #99a9bd;
  font-size: 12px;
  font-weight: 450;
  line-height: 1.65;
}

.lesson-mode .dsp-form-field > .dsp-input {
  min-height: 48px;
  margin: 0 0 0 41px;
  width: calc(100% - 41px);
  border-color: rgba(148, 163, 184, .2);
  color: #f7fbff;
  background: rgba(2, 9, 20, .52);
}

.lesson-mode .dsp-form-field > textarea.dsp-input {
  min-height: 94px;
  line-height: 1.65;
}

.lesson-mode .dsp-form-field > .dsp-input::placeholder {
  color: #657991;
}

.lesson-mode .dsp-checklist {
  margin-left: 41px;
}

.lesson-mode .dsp-checklist-option {
  align-items: center;
  border-color: rgba(148, 163, 184, .15);
  color: #cbd7e7;
  background: rgba(3, 10, 22, .3);
}

.lesson-mode .dsp-checklist-option:has(input:checked) {
  border-color: rgba(75, 222, 141, .45);
  color: #eafff3;
  background: rgba(48, 198, 115, .1);
}

.lesson-mode .dsp-form-submit {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 16px;
  padding: 20px 28px;
  border-top: 1px solid rgba(148, 163, 184, .16);
  background: rgba(3, 10, 22, .32);
}

.lesson-mode .dsp-form-submit .dsp-submit-hint {
  margin-right: auto;
  color: #8698af;
}

@media (max-width: 760px) {
  .lesson-mode .dsp-form-hero,
  .lesson-mode .dsp-form-flow,
  .lesson-mode .dsp-form-submit { padding-right: 18px; padding-left: 18px; }
  .lesson-mode .dsp-form-section > header { display: grid; }
  .lesson-mode .dsp-form-section > header p { text-align: left; }
  .lesson-mode .dsp-form-field .dsp-field-help,
  .lesson-mode .dsp-form-field > .dsp-input,
  .lesson-mode .dsp-checklist { width: 100%; margin-left: 0; }
  .lesson-mode .dsp-form-submit { align-items: stretch; flex-direction: column; }
  .lesson-mode .dsp-form-submit .dsp-btn { width: 100%; }
}

.lesson-mode .upload-zone > div {
  width: 100%;
}

.lesson-mode .upload-count {
  width: fit-content;
  margin: 12px auto;
  padding: 7px 11px;
  border-radius: 999px;
  color: #bcd0e7;
  background: rgba(42, 62, 92, .56);
  font-size: 12px;
}

.lesson-mode .upload-count b {
  color: #7eeab0;
  font-size: 14px;
}

.lesson-mode .upload-file-list {
  display: grid;
  width: 100%;
  gap: 8px;
  margin-top: 16px;
  text-align: left;
}

.lesson-mode .upload-file-row {
  display: grid;
  min-width: 0;
  align-items: center;
  padding: 11px 12px;
  border: 1px solid rgba(148, 163, 184, .18);
  border-radius: 13px;
  background: rgba(5, 14, 28, .5);
  grid-template-columns: 30px minmax(0, 1fr) auto;
  gap: 10px;
}

.lesson-mode .upload-file-index {
  display: grid;
  width: 28px;
  height: 28px;
  place-items: center;
  border-radius: 9px;
  color: #76e7a9;
  background: rgba(50, 211, 123, .12);
  font-size: 11px;
  font-weight: 900;
}

.lesson-mode .upload-file-row > div:nth-child(2) {
  min-width: 0;
}

.lesson-mode .upload-file-row > div:nth-child(2) strong,
.lesson-mode .upload-file-row > div:nth-child(2) small {
  display: block;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.lesson-mode .upload-file-row > div:nth-child(2) strong {
  color: #edf5ff;
  font-size: 13px;
}

.lesson-mode .upload-file-row > div:nth-child(2) small {
  margin-top: 2px;
  color: #8395ac;
  font-size: 11px;
}

.lesson-mode .upload-file-row .upload-file-actions {
  margin: 0;
}

.lesson-mode .button.disabled {
  opacity: .5;
  cursor: not-allowed;
}

@media (max-width: 760px) {
  .lesson-mode .upload-file-row { grid-template-columns: 30px minmax(0, 1fr); }
  .lesson-mode .upload-file-row .upload-file-actions { grid-column: 1 / -1; }
}

.runtime-completion-card {
  margin-top: .15rem;
  animation: runtime-completion-enter .24s ease-out;
}

@keyframes runtime-completion-enter {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

/* GPC-0144 activities share the introduction's lesson-player shell. */
.shorts-lesson {
  --shorts-ink: var(--text-strong);
  --shorts-muted: var(--muted);
  --shorts-line: var(--line);
  --shorts-accent: #32dc80;
  --shorts-surface: #101d32;
  color: var(--text);
}
.lesson-mode .shorts-lesson .shorts-lesson-panel {
  display: flex;
  flex-direction: column;
  height: calc(100dvh - var(--topbar) - 40px);
  min-height: 520px;
}
.shorts-lesson .shorts-toolbar { flex: 0 0 auto; gap: 18px; }
.shorts-toolbar > div:first-child { min-width: 0; }
.shorts-toolbar > div > span { color: var(--shorts-accent); font-size: 12px; font-weight: 700; }
.shorts-lesson .shorts-toolbar h1 { margin: 4px 0; font-size: clamp(20px, 2vw, 26px); line-height: 1.3; }
.shorts-lesson .shorts-toolbar p { margin: 0; color: var(--shorts-muted); font-size: 13px; }
.shorts-content-header { flex: 0 0 auto; padding: 16px 22px 12px; }
.shorts-activity-scroll { flex: 1 1 auto; min-height: 0; overflow-y: auto; padding: 0 22px 18px; scrollbar-gutter: stable; }
.shorts-episode-rail { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 10px; }
.shorts-episode { display: grid; gap: 8px; min-width: 0; padding: 10px 12px; border: 1px solid var(--shorts-line); border-radius: 10px; color: var(--shorts-ink); background: var(--shorts-surface); text-align: left; cursor: pointer; }
.shorts-episode:hover, .shorts-episode.active { border-color: var(--shorts-accent); }
.shorts-episode.active { background: rgba(50, 220, 128, .08); }
.shorts-episode-copy { display: flex; align-items: center; justify-content: space-between; gap: 8px; }
.shorts-episode-copy strong { font-size: 14px; }
.shorts-episode-copy small { color: var(--shorts-muted); font-size: 12px; }
.shorts-episode-track { height: 3px; overflow: hidden; border-radius: 999px; background: #22314a; }
.shorts-episode-track i { display: block; height: 100%; background: var(--shorts-accent); }
.shorts-activity { container-type: inline-size; min-width: 0; padding: 18px; border: 1px solid var(--shorts-line); border-radius: 14px; background: rgba(16, 29, 50, .6); }
.shorts-field { display: grid; gap: 7px; min-width: 0; }
.shorts-field > span { color: var(--shorts-ink); font-size: 13px; font-weight: 700; }
.shorts-field input, .shorts-field textarea { width: 100%; border: 1px solid #3a4d67; border-radius: 9px; color: var(--shorts-ink); background: #0a1527; font: inherit; font-size: 14px; line-height: 1.65; resize: vertical; }
.shorts-field input { height: 42px; padding: 0 11px; }
.shorts-field textarea { min-height: 80px; padding: 10px 11px; }
.shorts-field input::placeholder, .shorts-field textarea::placeholder { color: #8d9db5; opacity: 1; }
.shorts-field input:focus, .shorts-field textarea:focus { outline: 2px solid rgba(50, 220, 128, .45); outline-offset: 2px; border-color: var(--shorts-accent); }
.shorts-episode-forms { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; margin-top: 16px; }
.shorts-episode-form { display: grid; align-content: start; gap: 16px; min-width: 0; padding: 14px; border: 1px solid var(--shorts-line); border-radius: 12px; background: #0c182b; scroll-margin: 12px; }
.shorts-episode-form h2 { margin: 0; color: var(--shorts-ink); font-size: 16px; }
.shorts-scene-fields { display: grid; gap: 12px; min-width: 0; margin: 0; padding: 12px 0 0; border: 0; border-top: 1px solid var(--shorts-line); }
.shorts-scene-fields legend { padding: 0 6px 0 0; color: var(--shorts-muted); font-size: 12px; }
.shorts-form-grid { display: grid; gap: 12px; }
.shorts-form-grid.two { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.shorts-series-plan { margin-top: 18px; }
.shorts-series-plan > header { display: flex; align-items: baseline; flex-wrap: wrap; gap: 10px; margin-bottom: 8px; }
.shorts-series-plan > header strong { font-size: 14px; }
.shorts-series-plan > header span { color: var(--shorts-muted); font-size: 12px; }
.shorts-series-row { display: grid; grid-template-columns: 56px 1fr 1.35fr; align-items: end; gap: 10px; padding: 10px 0; border-top: 1px solid var(--shorts-line); }
.shorts-series-row > strong { align-self: center; font-size: 13px; }
.shorts-focus-form { display: grid; gap: 16px; max-width: 780px; }
.shorts-writing-tip { margin: 0; padding: 10px 12px; border-left: 3px solid #32dc80; color: #bed0df; background: rgba(50, 220, 128, .05); font-size: 13px; line-height: 1.6; }
.shorts-kicker { color: var(--shorts-accent); font-size: 12px; font-weight: 700; }
.shorts-audio-plan { display: grid; gap: 16px; }
.shorts-audio-section { display: grid; gap: 12px; min-width: 0; padding: 16px; border: 1px solid var(--shorts-line); border-radius: 10px; }
.shorts-audio-section h2 { margin: 0; font-size: 16px; }
.shorts-audio-section p, .shorts-audio-note { margin: 0; font-size: 13px; line-height: 1.65; color: var(--shorts-muted); }
.shorts-audio-plan .shorts-field select { width: 100%; min-width: 0; min-height: 42px; padding: 8px 11px; border: 1px solid #3a4d67; border-radius: 9px; color: var(--shorts-ink); background: #0a1527; font: inherit; font-size: 14px; }
.shorts-audio-plan .shorts-field select:focus { outline: 2px solid rgba(50, 220, 128, .45); outline-offset: 2px; }
.shorts-audio-plan [hidden] { display: none !important; }
.shorts-audio-checks { display: grid; gap: 10px; margin: 0; padding: 12px; border: 1px solid var(--shorts-line); border-radius: 8px; }
.shorts-audio-checks legend { font-size: 13px; padding: 0 5px; }
.shorts-audio-checks label { display: flex; align-items: start; gap: 8px; font-size: 13px; line-height: 1.6; }
.shorts-audio-summary { margin-bottom: 16px; }
.shorts-audio-summary dl { display: grid; grid-template-columns: auto 1fr; gap: 8px 14px; margin: 0; font-size: 13px; line-height: 1.6; }
.shorts-audio-summary dt { font-weight: 700; }
.shorts-audio-summary dd { margin: 0; overflow-wrap: anywhere; }
.shorts-script-layout { display: grid; grid-template-columns: minmax(0, 1fr) 230px; gap: 22px; }
.shorts-script-layout aside { padding: 16px; border-left: 1px solid var(--shorts-line); color: var(--shorts-muted); font-size: 13px; }
.shorts-script-layout aside strong { color: var(--shorts-ink); }
.shorts-script-meter { color: var(--shorts-muted); font-size: 12px; }
.shorts-radio { display: flex; gap: 7px; margin: 14px 0; color: var(--shorts-ink); }
.shorts-scene-tabs { display: flex; gap: 8px; margin-bottom: 16px; }
.shorts-scene-tabs button { display: flex; align-items: center; gap: 8px; min-width: 130px; padding: 9px 12px; border: 1px solid var(--shorts-line); border-radius: 8px; color: var(--shorts-ink); background: var(--shorts-surface); font: inherit; font-size: 13px; cursor: pointer; }
.shorts-scene-tabs button small { color: var(--shorts-muted); }
.shorts-scene-tabs button.active { border-color: var(--shorts-accent); background: rgba(50, 220, 128, .08); }
.shorts-media-workspace { display: grid; grid-template-columns: minmax(0, 1fr) 230px; align-items: start; gap: 26px; }
.shorts-media-editor { display: grid; gap: 12px; }
.shorts-media-editor > p { margin: 0; color: var(--shorts-muted); font-size: 13px; }
.shorts-media-editor > .button { justify-self: start; min-width: 160px; }
.shorts-portrait-preview { display: grid; justify-items: center; gap: 7px; min-height: 340px; color: var(--shorts-muted); font-size: 12px; }
.shorts-portrait-preview > div:first-child, .shorts-portrait-preview .generated-video-preview, .shorts-empty-phone, .shorts-finals-grid .generated-video-preview { display: grid; width: 176px; aspect-ratio: 9 / 16; overflow: hidden; place-items: center; border-radius: 10px; background: #050c18; }
.shorts-portrait-preview img, .shorts-portrait-preview video, .shorts-finals-grid video { width: 100%; height: 100%; object-fit: cover; }
.shorts-empty-phone { align-content: center; padding: 18px; color: var(--shorts-muted); text-align: center; }
.shorts-empty-phone span { color: #fff; font-size: 22px; font-weight: 700; }
.shorts-empty-phone p { font-size: 12px; }
.shorts-review-layout { display: grid; grid-template-columns: 1.2fr .8fr; gap: 22px; }
.shorts-preview-pair { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
.shorts-preview-pair article { display: grid; justify-items: center; gap: 7px; font-size: 13px; }
.shorts-preview-pair .generated-video-preview, .shorts-preview-pair .shorts-empty-phone { width: 150px; aspect-ratio: 9 / 16; overflow: hidden; border-radius: 9px; background: #050c18; }
.shorts-preview-pair video { width: 100%; height: 100%; object-fit: cover; }
.shorts-review-checks { display: grid; align-content: start; gap: 14px; padding-left: 20px; border-left: 1px solid var(--shorts-line); font-size: 13px; }
.shorts-review-checks > label:not(.shorts-field) { color: var(--text); }
.shorts-ai-review { margin-top: 18px; padding-top: 12px; border-top: 1px solid var(--shorts-line); font-size: 13px; }
.shorts-render-layout { display: grid; grid-template-columns: 260px minmax(0, 1fr); gap: 32px; max-width: 760px; margin: 0 auto; }
.shorts-render-summary { display: grid; align-content: center; justify-items: start; gap: 12px; }
.shorts-render-summary h2 { margin: 0; font-size: 25px; }
.shorts-render-summary ul { display: grid; gap: 7px; margin: 0; padding-left: 18px; color: var(--shorts-muted); font-size: 13px; }
.shorts-finals-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
.shorts-finals-grid article { display: grid; justify-items: center; gap: 8px; }
.shorts-finals-grid article header { display: flex; justify-content: space-between; width: 100%; color: var(--shorts-ink); font-size: 13px; }
.shorts-finals-grid article header span { color: var(--shorts-accent); }
.shorts-finals-grid .generated-video-preview, .shorts-finals-grid .shorts-empty-phone { width: 132px; }
.shorts-reflection { max-width: 760px; margin: 18px auto 0; }
.shorts-onboarding { display: grid; align-content: center; justify-items: center; min-height: 280px; text-align: center; }
.shorts-onboarding > strong { color: var(--shorts-accent); font-size: 13px; }
.shorts-onboarding h2 { margin: 5px 0 24px; font-size: 28px; }
.shorts-onboarding > div { display: flex; flex-wrap: wrap; align-items: center; justify-content: center; gap: 10px; color: var(--shorts-ink); font-size: 13px; }
.shorts-onboarding > div span { display: grid; width: 28px; height: 28px; place-items: center; border-radius: 50%; color: var(--shorts-ink); background: #21354b; font-weight: 700; }
.shorts-onboarding > div i { color: var(--shorts-muted); font-style: normal; }
.shorts-onboarding p { max-width: 560px; margin: 24px 0 0; color: var(--shorts-muted); font-size: 13px; }
.shorts-materials { margin-bottom: 16px; border: 1px solid var(--shorts-line); border-radius: 10px; background: #0c182b; }
.shorts-materials > h2 { margin: 0; padding: 12px 14px; color: var(--shorts-ink); font-size: 14px; font-weight: 700; }
.shorts-materials > .slide-card { margin: 0; border: 0; border-top: 1px solid var(--shorts-line); border-radius: 0 0 9px 9px; box-shadow: none; }
.shorts-action-bar { flex: 0 0 auto; display: grid; grid-template-columns: auto minmax(0, 1fr) auto; align-items: center; gap: 16px; margin: 0; padding: 14px 22px; border-top: 1px solid var(--shorts-line); background: #0c182b; }
.shorts-action-bar > div { min-width: 0; }
.shorts-action-bar small { color: var(--shorts-muted); font-size: 11px; }
.shorts-action-bar p { margin: 4px 0 0; color: var(--text); font-size: 12px; line-height: 1.5; overflow-wrap: anywhere; }
.shorts-action-bar .button { min-width: 90px; }
.shorts-action-bar .button:last-child { min-width: 160px; }
.shorts-lesson .generated-video-progress { width: 176px; min-height: 313px; }
.shorts-lesson .generated-video-progress > div { width: 80%; }
@container (max-width: 760px) {
  .shorts-episode-forms { grid-template-columns: 1fr; }
  .shorts-episode-form { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .shorts-episode-form h2 { grid-column: 1 / -1; }
  .shorts-review-layout { grid-template-columns: 1fr; }
}
@container (max-width: 480px) {
  .shorts-episode-form,
  .shorts-form-grid.two,
  .shorts-series-row,
  .shorts-script-layout,
  .shorts-media-workspace,
  .shorts-render-layout { grid-template-columns: 1fr; }
}
@media (max-width: 1100px) {
  .shorts-lesson .shorts-toolbar { align-items: start; flex-direction: column; gap: 10px; }
  .shorts-episode-forms { grid-template-columns: 1fr; }
  .shorts-episode-form { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .shorts-episode-form h2 { grid-column: 1 / -1; }
  .shorts-review-layout { grid-template-columns: 1fr; }
}
@media (max-width: 760px) {
  .lesson-mode .learner-runtime.lesson-player.shorts-lesson { grid-template-columns: 1fr; }
  .lesson-mode .shorts-lesson .shorts-lesson-panel { height: auto; min-height: calc(100dvh - var(--topbar) - 40px); }
  .shorts-activity-scroll { overflow: visible; padding: 0 12px 12px; }
  .shorts-content-header { padding: 12px; }
  .shorts-episode-rail { gap: 5px; }
  .shorts-episode { padding: 8px; }
  .shorts-episode-copy { align-items: start; flex-direction: column; gap: 4px; }
  .shorts-activity { padding: 12px; }
  .shorts-episode-form, .shorts-form-grid.two, .shorts-script-layout, .shorts-media-workspace, .shorts-render-layout { grid-template-columns: 1fr; }
  .shorts-series-row { grid-template-columns: 1fr; }
  .shorts-script-layout aside, .shorts-review-checks { padding: 12px 0 0; border-top: 1px solid var(--shorts-line); border-left: 0; }
  .shorts-action-bar { grid-template-columns: auto 1fr; gap: 10px; padding: 12px; }
  .shorts-action-bar > div { grid-column: 1 / -1; grid-row: 1; }
  .shorts-action-bar .button:last-child { justify-self: end; min-width: 0; }
  .shorts-finals-grid { grid-template-columns: 1fr; }
  .shorts-preview-pair .generated-video-preview, .shorts-preview-pair .shorts-empty-phone { width: min(150px, 100%); }
}

/* GPC-0201: activity guidance inside the existing three-column lesson shell. */
.lesson-mode .guided-literacy-lesson .learner-runtime.lesson-player.course-intro-layout {
  grid-template-columns: minmax(210px, 235px) minmax(0, 1fr) minmax(270px, 300px);
}
.lesson-mode .guided-literacy-lesson .runtime-inner { overflow: clip; }
.lesson-mode .guided-literacy-lesson .runtime-heading { gap: 16px; }
.lesson-mode .guided-literacy-lesson .runtime-heading p { color: #c4d1e2; font-size: 16px; }
.lesson-mode .guided-literacy-lesson .runtime-stage-progress { min-width: 48px; }
.lesson-mode .guided-literacy-lesson .runtime-stage-progress .progress-track { display: none; }
.lesson-mode .guided-literacy-lesson .runtime-inner > .dsp-step { margin: 18px 20px; }
.lesson-mode .guided-literacy-lesson .dsp-component { padding: 20px; box-shadow: none; }
.lesson-mode .guided-literacy-lesson .dsp-component h3 { margin: 0; font-size: 20px; line-height: 1.5; }
.lesson-mode .guided-literacy-lesson .dsp-readable-copy { color: #c4d1e2; font-size: 16px; line-height: 1.65; word-break: keep-all; }
.lesson-mode .guided-literacy-lesson .dsp-guided-slide { padding: 12px; gap: 8px; }

.lesson-mode .guided-literacy-lesson .guided-slide-expand { justify-self: end; min-height: 32px; padding: 4px 8px; border: 0; background: transparent; color: #c4d1e2; font: inherit; font-size: 14px; cursor: pointer; }
.lesson-mode .guided-literacy-lesson .dsp-form-grid { grid-template-columns: 1fr; gap: 22px; margin-top: 6px; }
.lesson-mode .guided-literacy-lesson .dsp-field { min-width: 0; margin: 0; padding: 0; border: 0; gap: 10px; color: #eff4fc; font-size: 16px; line-height: 1.65; }
.lesson-mode .guided-literacy-lesson .dsp-field legend { margin-bottom: 10px; padding: 0; font-weight: 700; }
.lesson-mode .guided-literacy-lesson .dsp-choice-list { display: grid; gap: 8px; }
.lesson-mode .guided-literacy-lesson .dsp-choice-option { display: flex; align-items: center; gap: 10px; min-height: 48px; padding: 10px 14px; border: 1px solid #3c506e; border-radius: 10px; background: #101f36; color: #e9f0fb; cursor: pointer; }
.lesson-mode .guided-literacy-lesson .dsp-choice-option b { font-weight: 500; }
.lesson-mode .guided-literacy-lesson .dsp-choice-option:has(input:checked) { border-color: #32dc80; background: #143b30; color: #fff; }
.lesson-mode .guided-literacy-lesson input[type="radio"] { width: 18px; height: 18px; flex: 0 0 18px; accent-color: #32dc80; }
.lesson-mode .guided-literacy-lesson .dsp-input { min-height: 48px; padding: 11px 13px; font-size: 16px; line-height: 1.5; }
.lesson-mode .guided-literacy-lesson .dsp-input::placeholder { color: #a7b7cd; opacity: 1; }
.lesson-mode .guided-literacy-lesson :is(button,input,select):focus-visible { outline: 3px solid #91b5ff; outline-offset: 3px; }
.lesson-mode .guided-literacy-lesson [aria-invalid="true"] { outline: 2px solid #ffb7ae; outline-offset: 2px; }
.lesson-mode .guided-literacy-lesson .guided-feedback { margin: 18px 20px; padding: 16px 20px; border: 1px solid #39765e; border-radius: 12px; background: #102a25; color: #eefbf4; line-height: 1.7; }
.lesson-mode .guided-literacy-lesson .guided-feedback[hidden] { display: none; }
.lesson-mode .guided-literacy-lesson .guided-feedback p { margin: 6px 0; }
.lesson-mode .guided-literacy-lesson .guided-feedback small { color: #bfd8cc; font-size: 14px; }
.lesson-mode .guided-literacy-lesson .guided-navigation { position: sticky; bottom: 0; z-index: 5; gap: 12px; background: #0a1427; box-shadow: 0 -8px 24px #050c1833; }
.lesson-mode .guided-literacy-lesson .guided-next { display: flex; flex-wrap: wrap; align-items: center; justify-content: flex-end; gap: 8px 12px; }
.lesson-mode .guided-literacy-lesson .guided-save-status { color: #c4d1e2; font-size: 13px; }
.lesson-mode .guided-literacy-lesson #guidedLessonError { flex-basis: 100%; margin: 0; color: #ffc1b9; font-size: 14px; text-align: right; }
.lesson-mode .guided-literacy-lesson #guidedLessonError:empty { display: none; }
.lesson-mode .guided-literacy-lesson .dsp-concept-fields { counter-reset: concept; }
.lesson-mode .guided-literacy-lesson .dsp-concept-fields > .dsp-field { position: relative; padding: 16px; border: 1px solid #3c506e; border-radius: 12px; background: #101f36; }
.lesson-mode .guided-literacy-lesson .dsp-concept-fields > .dsp-field + .dsp-field::before { content: '↓'; position: absolute; top: -26px; left: calc(50% - 8px); color: #71e9a6; font-size: 20px; }
.lesson-mode .guided-literacy-lesson .dsp-concept-fields .dsp-field-heading::before { counter-increment: concept; content: counter(concept); margin-right: 10px; color: #71e9a6; }
.lesson-mode .guided-literacy-lesson .dsp-concept-summary { padding-bottom: 18px; border-bottom: 1px solid #3c506e; }
.lesson-mode .guided-literacy-lesson .dsp-concept-flow { display: grid; gap: 20px; list-style: none; padding: 0; margin: 12px 0 0; }
.lesson-mode .guided-literacy-lesson .dsp-concept-flow li { position: relative; padding: 12px 16px; border: 1px solid #3c506e; border-radius: 10px; background: #101f36; }
.lesson-mode .guided-literacy-lesson .dsp-concept-flow li + li::before { content: '↓'; position: absolute; top: -24px; left: calc(50% - 8px); color: #71e9a6; }
.lesson-mode .guided-literacy-lesson .dsp-concept-flow b { color: #71e9a6; }
.lesson-mode .guided-literacy-lesson .dsp-concept-flow p { margin: 4px 0 0; color: #e9f0fb; overflow-wrap: anywhere; }
.guided-slide-dialog { max-width: min(96vw, 1200px); max-height: 95vh; padding: 12px; border: 1px solid #3c506e; border-radius: 16px; background: #0b172b; color: #fff; }
.guided-slide-dialog::backdrop { background: #020712df; }
.guided-slide-dialog img { display: block; max-width: 100%; max-height: calc(95vh - 80px); object-fit: contain; margin: auto; }
.guided-slide-dialog button { display: block; margin-left: auto; min-height: 40px; padding: 8px 14px; border: 1px solid #3c506e; border-radius: 8px; color: #fff; background: #101f36; font: inherit; cursor: pointer; }
@media (max-width: 1240px) and (min-width: 1000px) {
  .lesson-mode .guided-literacy-lesson .learner-runtime.lesson-player,
  .lesson-mode .guided-literacy-lesson .learner-runtime.lesson-player.course-intro-layout { grid-template-columns: 180px minmax(0, 1fr) 240px; gap: 12px; }
  .lesson-mode .guided-literacy-lesson .coach-panel.avatar-coach { grid-column: auto; position: sticky; top: calc(var(--topbar) + 20px); }
  .lesson-mode .guided-literacy-lesson .guided-save-status { flex-basis: 100%; text-align: right; }
}
@media (max-width: 999px) {
  .lesson-mode .guided-literacy-lesson .learner-runtime.lesson-player.course-intro-layout { grid-template-columns: 210px minmax(0, 1fr); }
}
@media (max-width: 760px) {
  .lesson-mode .guided-literacy-lesson .learner-runtime.lesson-player.course-intro-layout { grid-template-columns: 1fr; }
  .lesson-mode .guided-literacy-lesson .runtime-inner > .dsp-step { margin: 12px; }
  .lesson-mode .guided-literacy-lesson .dsp-component { padding: 14px; }
  .lesson-mode .guided-literacy-lesson .guided-navigation { flex-direction: row; padding: 12px; }
  .lesson-mode .guided-literacy-lesson .guided-save-status { display: none; }
  .lesson-mode .guided-literacy-lesson .guided-navigation .button { min-width: 0; }
}

/* Character assets remain inside the existing center lesson column. */
.guided-literacy-lesson .character-library-shelf { padding: 18px; border: 1px solid #38506e; border-radius: 14px; background: #0b172b; color: #e9f2ff; }
.guided-literacy-lesson .character-library-shelf header { display: flex; flex-wrap: wrap; gap: 8px; justify-content: space-between; align-items: center; }
.guided-literacy-lesson .character-library-shelf h3 { margin: 0; font-size: 18px; }
.guided-literacy-lesson .character-library-shelf header span { color: #a9dabb; font-size: 14px; }
.guided-literacy-lesson .character-criteria { margin: 14px 0; padding: 12px; border-radius: 10px; background: #13253d; font-size: 15px; line-height: 1.65; }
.guided-literacy-lesson .character-criteria p { margin: 4px 0 0; color: #c8d8ee; }
.guided-literacy-lesson .character-library-grid { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 12px; margin: 14px 0; }
.guided-literacy-lesson .character-library-grid article { display: grid; min-width: 0; gap: 8px; padding: 12px; background: #12243c; border: 1px solid #38506e; border-radius: 12px; }
.guided-literacy-lesson .character-library-grid article>b { color: #71e9a6; font-size: 14px; }
.guided-literacy-lesson .character-library-grid article>strong { font-size: 15px; overflow-wrap: anywhere; }
.guided-literacy-lesson .character-library-grid p { margin: 0; color: #c8d8ee; font-size: 14px; line-height: 1.5; }
.guided-literacy-lesson .character-library-grid [data-generated-image-preview] { min-height: 90px; }
.guided-literacy-lesson .character-empty { min-height: 48px; display: grid; place-items: center; color: #adbed2; font-size: 14px; }
.guided-literacy-lesson .character-library-shelf img { display: block; width: 100%; height: 130px; object-fit: contain; }
.guided-literacy-lesson .character-export-note { color: #c8d8ee; font-size: 14px; line-height: 1.65; }
.guided-literacy-lesson .character-library-warning { color: #ffc1b9; }
.guided-literacy-lesson .character-candidates { min-width: 0; padding: 0; margin: 12px 0; border: 0; color: #e9f2ff; }
.guided-literacy-lesson .character-candidates legend { margin-bottom: 12px; font-weight: 700; }
.guided-literacy-lesson .character-candidate-grid { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 12px; }
.guided-literacy-lesson .character-candidate-grid label { display: grid; gap: 12px; padding: 12px; border: 2px solid #38506e; border-radius: 12px; cursor: pointer; }
.guided-literacy-lesson .character-candidate-grid label:has(input:checked) { border-color: #32dc80; background: #143b30; }
.guided-literacy-lesson .character-candidate-grid img { display: block; width: 100%; height: 190px; object-fit: contain; }
.guided-literacy-lesson .character-image-generator { display: grid; grid-template-columns: 1fr; gap: 12px; padding: 0; color: #e9f2ff; }
.guided-literacy-lesson .character-image-generator .widget-textarea { min-height: 150px; max-height: 300px; font-size: 16px; }
.guided-literacy-lesson .character-image-generator p, .guided-literacy-lesson .character-image-generator small { color: #c8d8ee; font-size: 14px; line-height: 1.6; margin: 0; }
.guided-literacy-lesson .character-reference { display: flex; align-items: center; justify-content: space-between; gap: 16px; color: #c8d8ee; font-size: 14px; }
.guided-literacy-lesson .character-reference img { width: 130px; height: 100px; object-fit: contain; }
@media(max-width:600px) { .guided-literacy-lesson .character-candidate-grid { grid-template-columns: 1fr; } }

/* A tab keeps its last painted media until the replacement is ready. */
.media-pending { position: relative; }
.media-pending::after {
  content: '불러오는 중…';
  position: absolute;
  top: 10px;
  right: 10px;
  z-index: 3;
  padding: 5px 9px;
  border-radius: 6px;
  background: rgba(5, 12, 24, .8);
  color: #fff;
  font-size: 12px;
  line-height: 1.5;
  pointer-events: none;
}
.media-load-error { padding: 16px; color: var(--text-muted); }

/* Shared course media and teacher components, also loaded by builder previews. */
.lesson-mode img[data-lesson-slide][data-image-sizing="natural"] {
  display: block; width: 100%; height: auto; max-height: none; aspect-ratio: auto;
  object-fit: contain; border-radius: 10px;
}
.lesson-mode .coach-panel[data-speech-height="content"] { height: auto; min-height: 0; overflow: visible; }
.lesson-mode .coach-panel[data-speech-height="content"] .coach-speech { flex: 0 1 auto; min-height: 0; max-height: 300px; }
.lesson-mode .coach-panel[data-actions-layout="vertical"] .coach-primary-actions { grid-template-columns: 1fr; }

/* Shared response cards: builder preview and the student lesson use the same UI. */
.dsp-component.dsp-response-card {
  --response-bg: #fff;
  --response-inset: #f4f7fb;
  --response-line: #dce4ed;
  --response-text: #172d46;
  --response-muted: #526780;
  --response-accent: #14724b;
  --response-selected: #eef9f3;
  --response-warn: #925914;
  --response-warn-bg: #fff7e8;
  display: block;
  min-width: 0;
  padding: 0;
  overflow: hidden;
  border: 1px solid var(--response-line);
  border-radius: 20px;
  background: var(--response-bg);
  color: var(--response-text);
  box-shadow: 0 12px 32px rgb(10 26 48 / 5%);
}
.lesson-mode .dsp-component.dsp-response-card {
  --response-bg: #122238;
  --response-inset: #0d1c30;
  --response-line: #34465f;
  --response-text: #f0f5fc;
  --response-muted: #b0c0d4;
  --response-accent: #74e6ac;
  --response-selected: #153a30;
  --response-warn: #f4cd8d;
  --response-warn-bg: #332c24;
}
.lesson-mode .guided-literacy-lesson .dsp-component.dsp-response-card { padding: 0; }
.dsp-response-card .dsp-response-header {
  display: grid;
  gap: 16px;
  padding: 26px 28px 22px;
  border-bottom: 1px solid var(--response-line);
}
.dsp-response-eyebrow { display: flex; align-items: center; flex-wrap: wrap; gap: 10px; color: var(--response-accent); font-size: 13px; font-weight: 700; letter-spacing: .01em; }
.dsp-response-symbol { display: grid; place-items: center; width: 26px; height: 26px; border: 1px solid var(--response-line); border-radius: 8px; font-size: 17px; }
.dsp-response-mode { margin-left: auto; padding: 4px 9px; border: 1px solid var(--response-line); border-radius: 6px; color: var(--response-muted); font-size: 12px; font-weight: 500; }
.dsp-response-card.dsp-component .dsp-response-header h3 { margin: 0; color: var(--response-text); font-size: 22px; font-weight: 750; line-height: 1.45; letter-spacing: -.035em; word-break: keep-all; overflow-wrap: anywhere; }
.dsp-response-body { display: grid; gap: 20px; min-width: 0; padding: 26px 28px; }
.dsp-response-prompt { display: grid; gap: 9px; color: var(--response-text); font-size: 18px; line-height: 1.8; font-weight: 550; letter-spacing: -.02em; word-break: keep-all; overflow-wrap: anywhere; }
.dsp-response-prompt .dsp-instruction-section > b,
.dsp-response-prompt .dsp-instruction-item > b { color: var(--response-accent); }
.dsp-response-card .dsp-response-context { margin: -8px 0 0; color: var(--response-muted); font-size: 14px; line-height: 1.8; word-break: keep-all; overflow-wrap: anywhere; }
.dsp-response-guide { padding: 18px 20px; background: var(--response-inset); border: 1px solid var(--response-line); border-radius: 12px; }
.dsp-response-card .dsp-response-guide h4 { margin: 0 0 12px; color: var(--response-text); font-size: 13px; font-weight: 700; }
.dsp-response-card .dsp-response-guide .dsp-requirements { display: grid; gap: 10px; margin: 0; padding: 0; list-style: none; color: var(--response-muted); font-size: 14px; line-height: 1.7; }
.dsp-response-guide .dsp-requirements li { display: grid; grid-template-columns: 5px minmax(0, 1fr); gap: 12px; align-items: baseline; word-break: keep-all; overflow-wrap: anywhere; }
.dsp-response-guide .dsp-requirements li::before { content: ''; width: 4px; height: 4px; border-radius: 50%; background: var(--response-accent); transform: translateY(-3px); }
.dsp-response-example { border-bottom: 1px solid var(--response-line); padding-bottom: 16px; }
.dsp-response-example summary { display: flex; justify-content: space-between; gap: 12px; padding: 4px 0; color: var(--response-muted); cursor: pointer; font-size: 13px; list-style: none; }
.dsp-response-example summary::-webkit-details-marker { display: none; }
.dsp-response-example summary span { color: var(--response-accent); }
.dsp-response-example[open] summary span { transform: rotate(45deg); }
.dsp-response-example > div { margin-top: 12px; padding: 16px 18px; border-left: 2px solid var(--response-accent); background: var(--response-inset); border-radius: 0 8px 8px 0; }
.dsp-response-example p { margin: 0; color: var(--response-text); font-size: 14px; line-height: 1.8; overflow-wrap: anywhere; }
.dsp-response-example .dsp-response-example-note { margin-bottom: 8px; color: var(--response-muted); font-size: 12px; }
.dsp-response-writing { display: grid; gap: 11px; min-width: 0; }
.dsp-response-field-heading { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: baseline; gap: 8px; }
.dsp-response-field-heading label { color: var(--response-text); font-size: 14px; font-weight: 700; }
.dsp-response-field-heading > span { color: var(--response-muted); font-size: 12px; }
.dsp-response-card.dsp-component textarea.dsp-response-input {
  display: block; box-sizing: border-box; width: 100%; min-height: 200px; margin: 0; padding: 18px 20px;
  resize: vertical; border: 1px solid var(--response-line); border-radius: 12px;
  background: var(--response-inset); color: var(--response-text); font: inherit; font-size: 16px; line-height: 1.9;
  transition: border-color .15s, box-shadow .15s;
}
.dsp-response-card.dsp-component textarea.dsp-response-input.is-short { min-height: 94px; }
.dsp-response-card.dsp-component textarea.dsp-response-input::placeholder { color: var(--response-muted); opacity: .8; font-weight: 400; }
.dsp-response-card.dsp-component textarea.dsp-response-input:focus { outline: 0; border-color: var(--response-accent); box-shadow: 0 0 0 3px color-mix(in srgb, var(--response-accent) 15%, transparent); }
.dsp-response-card.dsp-component textarea.dsp-response-input[aria-invalid="true"] { border-color: var(--response-warn); }
.dsp-response-writing-meta { display: flex; justify-content: space-between; align-items: baseline; gap: 12px; color: var(--response-muted); font-size: 12px; line-height: 1.6; }
[data-response-count] { flex-shrink: 0; font-variant-numeric: tabular-nums; }
.dsp-response-options { display: grid; gap: 10px; min-width: 0; margin: 0; padding: 0; border: 0; }
.dsp-response-options legend { margin-bottom: 14px; padding: 0; color: var(--response-muted); font-size: 13px; line-height: 1.6; }
.dsp-response-option { position: relative; display: flex; align-items: center; gap: 14px; min-height: 68px; padding: 16px 18px; border: 1px solid var(--response-line); border-radius: 12px; background: var(--response-inset); color: var(--response-text); cursor: pointer; transition: border-color .15s, background .15s; }
.dsp-response-option:hover { border-color: var(--response-accent); }
.dsp-response-option:has(input:checked) { border-color: var(--response-accent); background: var(--response-selected); }
.dsp-response-option:has(input:focus-visible) { outline: 2px solid var(--response-accent); outline-offset: 3px; }
.dsp-response-option input { order: 3; flex: 0 0 19px; width: 19px; height: 19px; margin: 0 0 0 auto; accent-color: var(--response-accent); cursor: inherit; }
.dsp-response-option-number { flex: 0 0 28px; color: var(--response-muted); font-size: 13px; font-weight: 600; font-variant-numeric: tabular-nums; }
.dsp-response-option:has(input:checked) .dsp-response-option-number { color: var(--response-accent); }
.dsp-response-option-copy { display: grid; gap: 4px; min-width: 0; }
.dsp-response-option-copy b { color: var(--response-text); font-size: 15px; font-weight: 500; line-height: 1.7; word-break: keep-all; overflow-wrap: anywhere; }
.dsp-response-option-copy small { color: var(--response-muted); font-size: 13px; line-height: 1.6; }
.dsp-response-card .dsp-response-feedback { display: flex; align-items: flex-start; gap: 12px; padding: 18px; border: 1px solid var(--response-warn); border-radius: 12px; background: var(--response-warn-bg); color: var(--response-warn); }
.dsp-response-card .dsp-response-feedback[hidden] { display: none; }
.dsp-response-feedback[data-kind="correct"], .dsp-response-feedback[data-kind="submitted"] { border-color: var(--response-accent); background: var(--response-selected); color: var(--response-accent); }
.dsp-response-feedback-icon { display: grid; flex: 0 0 22px; place-items: center; height: 22px; border: 1px solid currentColor; border-radius: 50%; font-size: 12px; font-weight: 700; }
.dsp-response-feedback > div { min-width: 0; }
.dsp-response-card .dsp-response-feedback h4 { margin: 0 0 6px; color: inherit; font-size: 14px; line-height: 1.5; }
.dsp-response-card .dsp-response-feedback p { margin: 0; color: var(--response-text); font-size: 14px; line-height: 1.8; word-break: keep-all; overflow-wrap: anywhere; }
.dsp-response-footer { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 20px 28px; border-top: 1px solid var(--response-line); background: var(--response-inset); }
.dsp-response-footer > p { margin: 0; color: var(--response-muted); font-size: 12px; line-height: 1.7; }
.dsp-response-card .dsp-response-footer .dsp-btn-submit { display: flex; justify-content: center; align-items: center; gap: 24px; flex-shrink: 0; min-height: 46px; margin: 0; padding: 12px 20px; border: 0; border-radius: 9px; background: #68df9f; color: #092f20; font-size: 14px; font-weight: 750; box-shadow: none; }
.dsp-response-card .dsp-response-footer .dsp-btn-submit:hover:not(:disabled) { background: #8aefb9; transform: none; }
.dsp-response-card .dsp-response-footer .dsp-btn-submit:disabled { opacity: .65; cursor: default; }
.dsp-response-card textarea:disabled, .dsp-response-option:has(input:disabled) { opacity: 1; cursor: default; -webkit-text-fill-color: var(--response-text); }
.dsp-response-guided-note { color: var(--response-accent); font-size: 12px; line-height: 1.7; }
@media (max-width: 600px) {
  .dsp-component.dsp-response-card { border-radius: 14px; }
  .dsp-response-card .dsp-response-header { gap: 12px; padding: 20px 18px; }
  .dsp-response-card.dsp-component .dsp-response-header h3 { font-size: 20px; }
  .dsp-response-body { gap: 18px; padding: 20px 18px; }
  .dsp-response-prompt { font-size: 16px; }
  .dsp-response-guide { padding: 15px; }
  .dsp-response-card.dsp-component textarea.dsp-response-input { padding: 15px; min-height: 190px; }
  .dsp-response-option { gap: 8px; padding: 14px 12px; }
  .dsp-response-option-number { flex-basis: 24px; }
  .dsp-response-footer { flex-direction: column; align-items: stretch; gap: 12px; padding: 16px 18px; }
  .dsp-response-footer > p { text-align: center; }
  .dsp-response-card .dsp-response-footer .dsp-btn-submit { width: 100%; }
}
@media (prefers-reduced-motion: reduce) {
  .dsp-response-card *, .dsp-response-card *::before { transition: none !important; }
}

/* Activity audio follows the existing lesson cards and violet AI controls. */
.activity-audio-studio{padding:20px;border:1px solid #e5dff5;background:linear-gradient(145deg,#fcfbff,#fff);border-radius:18px}.activity-audio-heading{display:flex;align-items:center;gap:14px;margin-bottom:18px}.activity-audio-heading>span{display:grid;place-items:center;background:#eee8ff;color:#9275d1;border-radius:14px;width:48px;height:48px;font-size:26px}.activity-audio-heading h3{margin:4px 0;font-size:20px}.activity-audio-heading small,.activity-audio-settings{color:#a093b6;font-size:12px}.activity-audio-studio textarea{width:100%;box-sizing:border-box;min-height:130px;resize:vertical;border:1px solid #ded9ec;border-radius:12px;padding:14px;font:inherit;font-size:15px;line-height:1.8;background:#fff}.activity-audio-studio .field{display:grid;gap:10px}.activity-audio-settings{display:block;margin:12px 0}.activity-audio-note{color:#9a90aa;font-size:12px;line-height:1.7}.activity-audio-studio .upload-zone{margin-top:18px}.activity-audio-example,.activity-references{padding:14px;background:#f8f5ff;border:1px solid #e9e1f7;border-radius:12px;margin:12px 0}.activity-audio-example audio,.activity-references audio,.upload-file-row audio{width:100%;height:40px;margin-top:12px;grid-column:1/-1}.activity-references a{display:block;color:#9178bf;font-size:14px;padding:7px;overflow-wrap:anywhere}.activity-references h4{margin:0 0 8px}.activity-audio-studio button:disabled{opacity:.6;cursor:wait}

.media-save-studio{padding:22px;border:1px solid #e5dff2;border-radius:18px;background:linear-gradient(140deg,#fcfaff,#fff);color:#50465f}.media-save-heading{display:flex;gap:13px;align-items:center;margin-bottom:16px}.media-save-heading>span{width:46px;height:46px;display:grid;place-items:center;border-radius:13px;background:#ede6fa;color:#977ccc;font-size:26px}.media-save-heading small{font-size:10px;letter-spacing:1.5px;color:#a599b7}.media-save-heading h3{font-size:20px;margin:5px 0}.media-save-studio>p{line-height:1.7}.media-save-source{margin:22px 0}.media-save-source h4{font-size:14px;margin:0 0 12px}.media-save-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:12px}.media-save-item{border:1px solid #e6dff0;border-radius:13px;overflow:hidden;background:#fff;min-width:0}.media-save-item:has(input:checked){border-color:#ad94d7;box-shadow:0 0 0 1px #e6ddf5}.media-save-preview{display:grid;place-content:center;gap:9px;width:100%;height:150px;border:0;border-bottom:1px solid #eee8f5;background:linear-gradient(135deg,#f7f1ff,#f0f7fa);color:#b19ccf;cursor:pointer}.media-save-preview>span{font-size:34px}.media-save-preview>small{font-size:11px}.media-save-item>img,.media-save-item>video{display:block;width:100%;height:150px;object-fit:contain;background:#f8f5fb}.media-save-item>audio{display:block;width:100%;height:150px;padding:12px}.media-save-item label{display:flex;gap:9px;align-items:center;padding:13px;cursor:pointer}.media-save-item input{accent-color:#987ac8}.media-save-item b{display:block;font-size:12px;overflow-wrap:anywhere}.media-save-item label small{display:block;font-size:10px;color:#a49aae;margin-top:6px}.media-save-empty{padding:28px 18px;border:1px dashed #ded3ec;border-radius:12px;background:#faf8fd;color:#a394b4;text-align:center;font-size:13px;line-height:1.8}.media-save-footer{display:flex;gap:12px;align-items:center;justify-content:space-between;border-top:1px solid #eae4f1;padding-top:18px;margin-top:22px}.media-save-footer>span{font-size:12px;color:#9b83bd}.media-save-footer>div{display:flex;gap:8px;flex-wrap:wrap}.media-save-note,.media-save-status{font-size:12px;color:#a194b2;line-height:1.7}.media-save-status.error{color:#b46678}.media-save-studio button:disabled{opacity:.55;cursor:default}@media(max-width:600px){.media-save-footer{align-items:flex-start;flex-direction:column}.media-save-grid{grid-template-columns:1fr}}