:root {
  color-scheme: light;
  --bg: #f6f1e8;
  --surface: #fffaf1;
  --surface-strong: #ffffff;
  --ink: #21180f;
  --muted: #6e6256;
  --brand: #8b3f1f;
  --brand-strong: #5c2916;
  --accent: #f3b44b;
  --line: #e4d6c3;
  --success: #256a4d;
  --warning-bg: #fff4d6;
  --warning-ink: #6f4c00;
  --danger: #8b1f1f;
  --shadow: 0 24px 60px rgb(91 56 28 / 14%);
  --content-max: 1120px;
  --page-gutter: clamp(1rem, 4vw, 4rem);
  --panel-padding: clamp(1rem, 4vw, 2rem);
  --topbar-height: 4.75rem;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

/* Author display rules for panels and placeholders must not override hidden. */
[hidden] {
  display: none !important;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  background:
    radial-gradient(circle at top left, rgb(243 180 75 / 28%), transparent 32rem),
    linear-gradient(180deg, #fff9ee 0%, var(--bg) 48%, #efe4d4 100%);
  color: var(--ink);
}

a {
  color: inherit;
}

button,
input,
select {
  font: inherit;
}

button {
  min-height: 44px;
  border: 0;
  border-radius: 999px;
  background: var(--brand);
  color: #fff;
  font-weight: 750;
  cursor: pointer;
  transition: transform 140ms ease, box-shadow 140ms ease, background 140ms ease;
}

button:hover,
button:focus-visible {
  background: var(--brand-strong);
  box-shadow: 0 10px 24px rgb(92 41 22 / 22%);
  transform: translateY(-1px);
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.45;
  transform: none;
  box-shadow: none;
}

button:focus-visible,
a:focus-visible,
input:focus-visible,
select:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 3px;
}

.site-hero {
  padding: 3rem calc(var(--page-gutter) + var(--panel-padding) + 1px);
}

.site-hero,
main {
  width: min(var(--content-max), 100%);
  margin: 0 auto;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  width: 100%;
  min-height: var(--topbar-height);
  overflow-x: auto;
  background: rgb(255 250 241 / 96%);
  box-shadow: 0 1px 0 var(--line), 0 8px 20px rgb(91 56 28 / 10%);
  padding: 0.75rem var(--page-gutter);
  scrollbar-width: thin;
}

.brand,
.nav-links {
  color: inherit;
  font-weight: 850;
}

.brand,
.nav-links {
  display: inline-flex;
  flex: none;
  align-items: center;
  gap: 0.75rem;
}

.brand {
  text-decoration: none;
}

.nav-links {
  margin-left: auto;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 2.8rem;
  height: 2.8rem;
  border-radius: 1rem;
  background: var(--brand);
  color: #fff;
  letter-spacing: 0.04em;
}

.skip-link,
.nav-links a {
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgb(255 255 255 / 68%);
  padding: 0.65rem 0.9rem;
  text-decoration: none;
}

.skip-link {
  position: fixed;
  top: 0.75rem;
  left: 1rem;
  z-index: 20;
  color: var(--ink);
  font-weight: 850;
  transform: translateY(-150%);
}

.skip-link:focus-visible {
  transform: translateY(0);
}

.hero-copy {
  max-width: 820px;
}

.eyebrow {
  margin: 0 0 0.5rem;
  color: var(--brand);
  font-size: 0.78rem;
  font-weight: 850;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 1rem;
  max-width: 13ch;
  font-size: clamp(2.4rem, 12vw, 5.2rem);
  line-height: 0.94;
  letter-spacing: -0.07em;
}

h2 {
  margin-bottom: 0.7rem;
  font-size: clamp(1.7rem, 5vw, 3rem);
  letter-spacing: -0.045em;
}

h3 {
  margin-bottom: 0.5rem;
}

.hero-copy p,
.section-heading p,
.meta,
.unavailable,
.help-text {
  color: var(--muted);
  line-height: 1.6;
}

.hero-copy p,
.section-heading p {
  max-width: 68ch;
  font-size: 1.05rem;
}

main {
  display: grid;
  gap: 1.2rem;
  padding: 0 var(--page-gutter) 4rem;
}

.panel {
  border: 1px solid var(--line);
  border-radius: 1.5rem;
  background: rgb(255 250 241 / 88%);
  box-shadow: var(--shadow);
  padding: var(--panel-padding);
}

.lessons-panel {
  min-width: 0;
}

#dictionary,
#lessons,
#capture,
#lookup-input {
  scroll-margin-top: calc(var(--topbar-height) + 1rem);
}

.dictionary-selectors,
.lookup-form {
  display: grid;
  gap: 0.8rem;
  margin: 1.3rem 0 1rem;
}

.dictionary-selectors {
  border: 1px solid var(--line);
  border-radius: 1rem;
  background: rgb(255 255 255 / 56%);
  padding: 1rem;
}

.dictionary-selectors h3 {
  margin-bottom: 0;
}

.dictionary-selector-grid {
  display: grid;
  gap: 0.8rem;
}

.dictionary-selector-grid > div {
  display: grid;
  gap: 0.45rem;
}

.lookup-form label,
.dictionary-selector-grid label {
  font-weight: 800;
}

.input-row {
  display: grid;
  gap: 0.75rem;
}

input,
select {
  width: 100%;
  min-height: 3.25rem;
  border: 1px solid var(--line);
  border-radius: 1rem;
  background: var(--surface-strong);
  color: var(--ink);
  padding: 0 1rem;
}

.input-row button,
.playback-controls button,
.lesson-actions button,
.practice-options button,
.capture-actions button,
.save-actions button,
.saved-recording-actions button {
  padding: 0 1.1rem;
}

.help-text {
  margin-bottom: 0;
  font-size: 0.95rem;
}

.examples,
.token-list,
.playback-controls,
.lesson-actions,
.practice-options,
.capture-actions,
.save-actions,
.saved-recording-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.examples button {
  min-height: 40px;
  border: 1px solid var(--line);
  background: var(--surface-strong);
  color: var(--brand-strong);
  padding: 0 0.9rem;
}

.results {
  display: grid;
  gap: 1rem;
  margin-top: 1.5rem;
}

.summary {
  margin: 0;
  border-left: 4px solid var(--accent);
  color: var(--muted);
  font-weight: 750;
  padding-left: 0.85rem;
}

.card-grid {
  display: grid;
  gap: 0.9rem;
}

.lesson-gallery-controls {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 0.6rem;
  margin: 1rem 0 0.55rem;
}

.lesson-gallery-controls button {
  padding: 0 1.1rem;
}

.lesson-gallery-controls + .help-text {
  margin-bottom: 0.65rem;
}

.lesson-list {
  display: grid;
  min-inline-size: 0;
  max-inline-size: 100%;
  grid-auto-columns: clamp(15rem, 72vw, 20rem);
  grid-auto-flow: column;
  gap: 0.9rem;
  overflow-x: auto;
  overscroll-behavior-inline: contain;
  padding: 0.25rem 0.25rem 0.8rem;
  scroll-padding-inline: 0.25rem;
  scroll-snap-type: x mandatory;
  scrollbar-color: var(--brand) var(--surface);
  scrollbar-width: thin;
}

.lesson-list:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 3px;
}

.lesson-list::-webkit-scrollbar {
  height: 0.65rem;
}

.lesson-list::-webkit-scrollbar-thumb {
  border: 2px solid var(--surface);
  border-radius: 999px;
  background: var(--brand);
}

.lesson-list::-webkit-scrollbar-track {
  border-radius: 999px;
  background: var(--surface);
}

.sign-card,
.local-sign-card,
.local-dictionary-panel,
.lesson-card,
.unknown-panel,
.playback-panel,
.practice-panel,
.camera-card,
.capture-panel {
  border: 1px solid var(--line);
  border-radius: 1.2rem;
  background: var(--surface-strong);
}

.sign-card,
.local-sign-card,
.local-dictionary-panel,
.lesson-card,
.unknown-panel,
.playback-panel,
.practice-panel,
.camera-card {
  padding: 1rem;
}

.sign-card,
.local-sign-card,
.local-dictionary-panel,
.playback-panel,
.lesson-card,
.practice-panel,
.practice-card {
  display: grid;
  gap: 0.85rem;
}

.lesson-card {
  align-content: start;
  scroll-snap-align: start;
  scroll-snap-stop: always;
}

.card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
}

.badge,
.token,
.status-pill {
  display: inline-flex;
  align-items: center;
  width: fit-content;
  border-radius: 999px;
  padding: 0.3rem 0.7rem;
  font-size: 0.82rem;
  font-weight: 800;
}

.badge {
  background: #f7e2c0;
  color: var(--brand-strong);
}

.local-badge {
  display: inline-flex;
  align-items: center;
  width: fit-content;
  border-radius: 999px;
  background: #e4edf9;
  color: #184e85;
  padding: 0.3rem 0.7rem;
  font-size: 0.82rem;
  font-weight: 800;
}

.local-dictionary-panel {
  border-color: #9eb8d5;
  background: #f4f8ff;
}

.local-dictionary-list {
  display: grid;
  gap: 0.75rem;
}

.local-sign-card {
  border-color: #c9d9ec;
  background: rgb(255 255 255 / 80%);
}

.local-video-status {
  margin: 0;
}

.status-pill {
  background: var(--warning-bg);
  color: var(--warning-ink);
}

.token {
  background: #eee5d7;
  color: var(--ink);
}

.sequence-video,
.entry-video,
.capture-video {
  width: 100%;
  max-height: 24rem;
  border-radius: 1rem;
  background: #1c1712;
}

.video-placeholder {
  min-height: 9rem;
  display: grid;
  place-items: center;
  border: 1px dashed #d4b991;
  border-radius: 1rem;
  background: var(--warning-bg);
  color: var(--warning-ink);
  padding: 1rem;
  text-align: center;
  font-weight: 800;
}

.video-error {
  color: var(--danger);
  font-weight: 750;
}

.unavailable {
  margin: 0;
  font-size: 0.95rem;
}

.lesson-card.is-active {
  border-color: var(--brand);
  box-shadow: 0 0 0 3px rgb(139 63 31 / 14%);
}

.practice-panel {
  margin-top: 1rem;
  background: #fffef9;
}

.practice-card:empty {
  display: none;
}

.practice-options button[aria-pressed="true"] {
  background: var(--success);
}

.capture-panel {
  display: grid;
  gap: 1rem;
  background: linear-gradient(135deg, #fff, #fff1d3);
}

.capture-form,
.camera-card {
  display: grid;
  gap: 0.8rem;
}

.camera-card {
  align-content: start;
}

.capture-actions,
.save-actions {
  align-self: start;
  justify-self: start;
  width: fit-content;
  max-width: 100%;
}

.capture-actions button,
.save-actions button,
.saved-recording-actions button {
  flex: none;
}

.capture-form label {
  font-weight: 800;
}

.camera-grid {
  display: grid;
  gap: 1rem;
}

.save-actions button {
  background: var(--success);
}

.saved-recordings {
  display: grid;
  gap: 0.8rem;
  border: 1px solid var(--line);
  border-radius: 1.2rem;
  background: rgb(255 255 255 / 70%);
  padding: 1rem;
}

.saved-recordings-list {
  display: grid;
  gap: 0.75rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.saved-recording {
  display: grid;
  gap: 0.65rem;
  border: 1px solid var(--line);
  border-radius: 1rem;
  background: var(--surface-strong);
  padding: 0.85rem;
}

.saved-recording-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.saved-recording-actions .delete-recording {
  background: var(--danger);
}

.metadata-preview {
  max-height: 14rem;
  overflow: auto;
  border: 1px solid var(--line);
  border-radius: 1rem;
  background: #1c1712;
  color: #fff8ee;
  padding: 1rem;
  white-space: pre-wrap;
}

@media (min-width: 720px) {
  .dictionary-selector-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .input-row {
    grid-template-columns: 1fr auto;
  }

  .card-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .camera-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    align-items: start;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}