/* The cascade layer order, and the legacy layer.
 *
 * The order is declared here because this is the first stylesheet the page
 * links, and the first statement to name a layer fixes its place. Layout comes
 * after components because it places them: a component's own display or
 * margin must not undo where the layout put it.
 *
 * The legacy layer is the app's earlier stylesheet, kept whole and lowest, so
 * the layers above it (css/tokens.css onwards) win without specificity fights.
 * It still applies wherever no later layer sets the same property, so a
 * deletion here must be checked on screen. It grew in passes, each one
 * overriding the rules above it, so the rule that applies to a selector is
 * often the last one in the file.
 */
@layer legacy, tokens, base, components, layout, screens, utilities;

@layer legacy {
:root {
  color-scheme: light;
  --bg: #f4f1ea;
  --bg-soft: #ebe6dc;
  --surface: #fbfaf6;
  --surface-raised: #fffdf8;
  --surface-muted: #eee9dd;
  --text: #1d2837;
  --text-strong: #111a26;
  --muted: #657386;
  --subtle: #8b98a8;
  --border: #ded7c9;
  --border-strong: #c4baaa;
  --primary: #285d87;
  --primary-strong: #1f496b;
  --primary-soft: #e6eef4;
  --success: #497c5d;
  --success-soft: #e5efe8;
  --warning: #b9852f;
  --warning-soft: #f4ead7;
  --accent: #517f8d;
  --accent-soft: #e2ecef;
  --danger: #a4524d;
  --danger-soft: #f1dfdc;
  --shadow-sm: 0 1px 2px rgba(29, 40, 55, .05), 0 4px 12px rgba(29, 40, 55, .06);
  --shadow: 0 10px 30px rgba(29, 40, 55, .08), 0 2px 8px rgba(29, 40, 55, .05);
  --shadow-lg: 0 18px 50px rgba(29, 40, 55, .12);
  --radius-sm: 8px;
  --radius: 12px;
  --radius-lg: 18px;
  --radius-xl: 26px;
  --pill: 999px;
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-8: 32px;
  --space-10: 40px;
  --header-h: 68px;
  --max: 1440px;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

/* The root is themed before the stylesheets apply; body and shell follow
   once the app has started. */
:root[data-theme="dark"],
.app-shell[data-theme="dark"],
body[data-theme="dark"] {
  color-scheme: dark;
  --bg: #17202a;
  --bg-soft: #111923;
  --surface: #202b36;
  --surface-raised: #25323f;
  --surface-muted: #1a2430;
  --text: #eef1ed;
  --text-strong: #fbfcf7;
  --muted: #b4bebf;
  --subtle: #8f9a9d;
  --border: #344350;
  --border-strong: #4b5d69;
  --primary: #8eb3cf;
  --primary-strong: #b5cfe2;
  --primary-soft: #223747;
  --success: #8cbd9a;
  --success-soft: #20382b;
  --warning: #d2a85f;
  --warning-soft: #3b2f1e;
  --accent: #91bcc6;
  --accent-soft: #213941;
  --danger: #d1908b;
  --danger-soft: #3f2827;
  --shadow-sm: 0 1px 2px rgba(0,0,0,.15), 0 6px 16px rgba(0,0,0,.18);
  --shadow: 0 12px 32px rgba(0,0,0,.22);
  --shadow-lg: 0 18px 50px rgba(0,0,0,.32);
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
html, body { margin: 0; min-height: 100%; }
body {
  background:
    radial-gradient(circle at top left, color-mix(in srgb, var(--primary-soft), transparent 45%), transparent 34vw),
    linear-gradient(180deg, var(--bg), var(--bg-soft));
  color: var(--text);
  font-size: 16px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}
button, input, select, textarea { font: inherit; color: inherit; }
button { cursor: pointer; border: 0; -webkit-tap-highlight-color: transparent; }
img { display: block; max-width: 100%; height: auto; }
a { color: var(--primary); text-decoration: none; }

.app-shell { min-height: 100vh; display: flex; flex-direction: column; }
.topbar {
  min-height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding: 10px clamp(14px, 3vw, 28px);
  background: color-mix(in srgb, var(--surface-raised), transparent 8%);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(14px) saturate(130%);
  position: sticky;
  top: 0;
  z-index: 50;
}
.brand { display: inline-flex; align-items: center; gap: 12px; color: var(--text); min-width: 0; }

.brand strong { display:block; font-size: 18px; line-height: 1.1; color: var(--text-strong); }
.brand small { display:block; color: var(--muted); font-size: 13px; margin-top: 3px; }

.eyebrow {
  display:inline-flex; align-items:center; gap:6px; color: var(--primary); text-transform: uppercase; letter-spacing: .08em; font-size: 12px; font-weight: 800;
}

/* Workspace */
.workspace { width:min(var(--max), 100%); margin: 0 auto; padding: clamp(14px, 2.6vw, 28px); display:grid; gap: 22px; grid-template-columns: minmax(0, 1fr); }
@media (min-width: 1120px) { .workspace { grid-template-columns: minmax(0, 1.45fr) minmax(320px, .82fr); align-items:start; } }
.camera-column { min-width:0; display:flex; flex-direction:column; gap:16px; }

/* The .mode-only visibility rules are in the utilities layer (css/layout.css). */
.app-shell[data-mode="project"] .camera-column { display:none; }
.app-shell[data-mode="project"] .project-screen { grid-column:1 / -1; }
.app-shell[data-mode="test"] .camera-column { display:none; }
.app-shell[data-mode="test"] .model-test-screen { grid-column:1 / -1; }
.app-shell[data-mode="qr"] .camera-column { display:none; }
.app-shell[data-mode="qr"] .qr-screen { grid-column:1 / -1; }

.button { display:inline-flex; align-items:center; justify-content:center; gap:8px; min-height:42px; padding: 9px 16px; border-radius: var(--radius); border:1px solid var(--border-strong); background: var(--surface-raised); color: var(--text); font-weight:700; font-size:14px; transition: transform .12s ease, background .16s ease, color .16s ease, border-color .16s ease; }
.button:hover { background: var(--surface-muted); border-color: var(--primary); }
.button:active { transform: translateY(1px); }
.button.primary { background: var(--primary); border-color: var(--primary); color: var(--surface-raised); box-shadow: var(--shadow-sm); }
.button.primary:hover { background: var(--primary-strong); color: var(--surface-raised); }
.button.quiet { background: transparent; border-color: transparent; color: var(--muted); }
.button.full { width:100%; }

.card { background: var(--surface-raised); border:1px solid var(--border); border-radius: var(--radius-lg); padding:18px; box-shadow: var(--shadow-sm); }
.card-heading { display:flex; align-items:flex-start; justify-content:space-between; gap:12px; margin-bottom:12px; }
.card-heading > span { color:var(--muted); text-transform:uppercase; letter-spacing:.06em; font-size:12px; font-weight:850; }

.card-note { margin:0; color:var(--muted); font-size:14px; }
.cursor { display:inline-block; width:2px; height:.9em; background: var(--primary); margin-left:2px; vertical-align:middle; animation: blink 1s steps(2) infinite; }
@keyframes blink { to { opacity:0; } }
.feedback-bar { margin-top:12px; padding:10px 12px; border-left:4px solid var(--warning); background:var(--warning-soft); border-radius:var(--radius); font-size:14px; }
.feedback-bar--confusion { border-left-color: var(--accent); background: var(--accent-soft); }
.feedback-bar--hard { border-left-color: var(--warning); background: var(--warning-soft); }
.feedback-bar--low { border-left-color: var(--danger); background: color-mix(in srgb, var(--danger), transparent 88%); }

.feedback-bar--good { border-left-color: var(--success); background: color-mix(in srgb, var(--success), transparent 88%); }

.card-heading > strong { color:var(--text-strong); font-size:14px; }

.top3-list { display:flex; flex-direction:column; gap:10px; }
.top3-row { display:grid; grid-template-columns:22px 1fr 58px; align-items:center; gap:10px; font-size:14px; }
.rank { width:22px; height:22px; border-radius:50%; display:grid; place-items:center; background:var(--surface-muted); color:var(--muted); font-size:12px; font-weight:850; }
.top3-row:first-child .rank { background:var(--primary); color:var(--surface-raised); }
.bar, .meter { height:8px; background:var(--surface-muted); border-radius:var(--pill); overflow:hidden; }
.bar > span, .meter > span { display:block; height:100%; background:var(--primary); border-radius:var(--pill); transition: width .22s ease; }
.top3-row > strong { text-align:right; font-variant-numeric: tabular-nums; }

.word-state-card, .word-demo-card, .word-library-card { border-left:4px solid var(--accent); }
.word-state-card p { margin: 8px 0 0; color: var(--muted); font-size:14px; }
.quality-pills { display:flex; flex-wrap:wrap; gap:8px; margin-top:12px; }
.quality-pills span { border-radius:var(--pill); padding:6px 10px; background:var(--accent-soft); color:var(--accent); font-weight:800; font-size:12px; }
.quality-pills span[data-ok="true"] { background: color-mix(in srgb, var(--success), transparent 86%); color: var(--success); }
.quality-pills span[data-ok="false"] { background: var(--warning-soft); color: var(--warning); }
.word-result-guide { margin-top:12px; padding:12px; border:1px solid var(--border); border-radius:var(--radius); background:var(--surface); display:grid; gap:4px; }
.word-result-guide[hidden] { display:none; }
.word-result-guide strong { color:var(--text-strong); font-size:14px; }
.word-result-guide span { color:var(--muted); font-size:14px; line-height:1.45; }
.word-result-guide[data-level="good"] { border-color: color-mix(in srgb, var(--success), transparent 55%); background: color-mix(in srgb, var(--success), transparent 92%); }
.word-result-guide[data-level="maybe"] { border-color: color-mix(in srgb, var(--warning), transparent 45%); background: var(--warning-soft); }
.word-result-guide[data-level="low"] { border-color: color-mix(in srgb, var(--danger), transparent 55%); background: color-mix(in srgb, var(--danger), transparent 92%); }
.word-group { padding:12px; border-radius:var(--radius); margin-bottom:10px; background:var(--surface-muted); }
.word-group h3 { margin:0 0 5px; font-size:14px; color:var(--text-strong); }
.word-group p { margin:0; color:var(--muted); font-size:14px; }
.word-group.good { border-left:4px solid var(--success); }
.word-group.risky { border-left:4px solid var(--warning); }

/* Word chips: each list that holds them is a wrapping row. */
#wordDemoList,
#wordRiskList,
#wordConfusionList {
  display:flex; flex-wrap:wrap; gap:6px;
  margin:0;
}

.word-categories { display:grid; gap:10px; }
.word-categories div { padding:10px; border-radius:var(--radius); border:1px solid var(--border); background:var(--surface); }
.word-categories strong, .word-categories span { display:block; }
.word-categories span { color:var(--muted); font-size:14px; margin-top:3px; }

.coach-card { border-left:4px solid var(--primary); background: linear-gradient(180deg, var(--surface-raised), color-mix(in srgb, var(--primary-soft), var(--surface-raised) 45%)); }
.field-label { display:block; color:var(--muted); text-transform:uppercase; letter-spacing:.06em; font-size:12px; font-weight:850; margin-bottom:6px; }
.select-input { width:100%; padding:10px 12px; border-radius:var(--radius); border:1px solid var(--border-strong); background:var(--surface); color:var(--text); }
.coach-target { display:flex; gap:14px; align-items:center; padding:14px; border:1px solid var(--border); border-radius:var(--radius); background:var(--surface-raised); margin-top:12px; }
.coach-target span { width:78px; height:78px; border-radius:18px; display:grid; place-items:center; font-size:56px; font-weight:900; color:var(--primary); background:var(--primary-soft); flex:0 0 auto; }
.coach-target p { margin:0; color:var(--muted); font-size:14px; }
.coach-progress { display:grid; grid-template-columns: repeat(8, 1fr); gap:5px; margin-top:12px; }
.coach-progress > span { height:8px; border-radius:var(--pill); background:var(--surface-muted); }
.coach-progress > span[data-state="hit"] { background:var(--success); }
.coach-progress > span[data-state="active"] { background:var(--primary); }
.coach-tips { margin-top:12px; padding:12px; border-radius:var(--radius); background:var(--surface); border:1px dashed var(--border-strong); }
.coach-tips strong { display:block; color:var(--text-strong); font-size:13px; text-transform:uppercase; letter-spacing:.06em; margin-bottom:5px; }
.coach-tips li { color:var(--muted); font-size:14px; }
.coach-tips ul { margin:0; padding-left:18px; }

.reference-thumbs { position:sticky; bottom:0; display:flex; flex-wrap:wrap; gap:8px; padding:10px; background:color-mix(in srgb, var(--surface-raised), transparent 8%); border-top:1px solid var(--border); }
.reference-thumb { width:34px; height:34px; border-radius:var(--radius-sm); border:1px solid var(--border-strong); background:var(--surface); color:var(--muted); font-weight:850; }
.reference-thumb[data-active="true"] { background:var(--accent); border-color:var(--accent); color:var(--surface-raised); }
.reference-thumb:hover { border-color:var(--accent); color:var(--accent); }
.reference-thumb[data-active="true"]:hover { color:var(--surface-raised); }

.project-screen { background:var(--surface-raised); border:1px solid var(--border); border-radius:var(--radius-xl); padding: clamp(20px, 4vw, 44px); box-shadow:var(--shadow); }
.project-content { max-width: 1120px; margin:0 auto; }
.project-content h2 { margin:8px 0 8px; color:var(--text-strong); font-size: clamp(32px, 5vw, 54px); line-height:1; letter-spacing:-.04em; }
.project-subtitle { color:var(--muted); font-size:18px; max-width: 820px; }
.metric-row { display:grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap:12px; margin:22px 0; }
.metric-card { padding:16px; border-radius:var(--radius); border:1px solid var(--border); background:var(--surface); }
.metric-card strong { display:block; font-size:28px; color:var(--primary); line-height:1; }
.metric-card span { display:block; margin-top:6px; color:var(--muted); font-size:13px; }
.project-section { border-top:1px solid var(--border); padding-top:22px; margin-top:22px; }
.project-section h3 { margin:0 0 10px; color:var(--text-strong); font-size:20px; }
.project-section p, .project-section li { color:var(--muted); }
.project-callout {
  display:grid;
  gap:5px;
  margin-top:14px;
  padding:14px 16px;
  border-radius:var(--radius);
  border:1px solid color-mix(in srgb, var(--primary), transparent 70%);
  background:var(--primary-soft);
}
.project-callout strong {
  color:var(--primary);
  font-size:13px;
  text-transform:uppercase;
  letter-spacing:.06em;
}
.project-callout span {
  color:var(--text);
  font-weight:700;
  line-height:1.45;
}
.project-demo-grid,
.project-model-grid,
.project-info-grid {
  display:grid;
  grid-template-columns:repeat(2, minmax(0, 1fr));
  gap:12px;
}
.project-demo-grid div,
.project-info-grid div,
.project-model-grid article {
  padding:15px;
  border:1px solid var(--border);
  border-radius:var(--radius);
  background:var(--surface);
}
.project-demo-grid strong,
.project-info-grid strong,
.project-model-grid span {
  display:block;
  color:var(--text-strong);
  font-weight:850;
  margin-bottom:6px;
}
.project-demo-grid span,
.project-info-grid span,
.project-model-grid p {
  color:var(--muted);
  font-size:14px;
  line-height:1.5;
}
.project-model-grid {
  margin-top:14px;
}
.project-model-grid article {
  border-left:4px solid var(--primary);
}
.project-model-grid span {
  color:var(--primary);
  font-size:12px;
  text-transform:uppercase;
  letter-spacing:.06em;
}
.project-model-grid h4 {
  margin:0 0 8px;
  color:var(--text-strong);
  font-size:18px;
}
.project-model-grid p {
  margin:0;
}
.pipeline-flow { display:flex; flex-wrap:wrap; gap:8px; align-items:center; }
.pipeline-step { padding:8px 10px; border-radius:var(--pill); background:var(--primary-soft); color:var(--primary); font-weight:800; font-size:13px; }
.pipeline-arrow { color:var(--subtle); }
.project-footer { display:flex; flex-wrap:wrap; justify-content:space-between; gap:10px; font-size:14px; }

.model-test-screen {
  background:var(--surface-raised);
  border:1px solid var(--border);
  border-radius:var(--radius-lg);
  padding: clamp(18px, 3vw, 34px);
  box-shadow:var(--shadow-sm);
}
.model-test-header {
  display:flex;
  align-items:flex-start;
  justify-content:space-between;
  gap:16px;
  margin-bottom:14px;
}
.model-test-header h2 {
  margin:6px 0;
  color:var(--text-strong);
  font-size:clamp(28px, 3.4vw, 42px);
  line-height:1.06;
}
.model-test-header p {
  margin:0;
  max-width:760px;
  color:var(--muted);
  font-size:16px;
}
.model-test-badges,
.model-test-task-switch {
  display:flex;
  flex-wrap:wrap;
  gap:8px;
}
.model-test-badges span {
  padding:7px 10px;
  border-radius:var(--pill);
  background:var(--surface-muted);
  color:var(--muted);
  font-size:12px;
  font-weight:850;
  white-space:nowrap;
}
.model-test-brief {
  display:grid;
  grid-template-columns:repeat(3, minmax(0, 1fr));
  gap:10px;
  margin-bottom:16px;
}
.model-test-brief div {
  min-width:0;
  padding:12px;
  border-radius:var(--radius);
  background:var(--surface-muted);
  border:1px solid var(--border);
}
.model-test-brief strong,
.model-test-brief span {
  display:block;
}
.model-test-brief strong {
  color:var(--text-strong);
  font-size:13px;
}
.model-test-brief span {
  margin-top:4px;
  color:var(--muted);
  font-size:13px;
  line-height:1.4;
}
.model-test-grid {
  display:grid;
  grid-template-columns:minmax(300px, .92fr) minmax(0, 1.08fr);
  gap:16px;
  align-items:start;
}
.model-test-card,
.model-output-card,
.model-sample-meta {
  border-left:4px solid var(--primary);
  box-shadow:none;
}
.model-test-card .model-test-task-switch {
  display:grid;
  grid-template-columns:repeat(2, minmax(0, 1fr));
  gap:10px;
  margin:8px 0 12px;
}
.model-test-card .segmented-button {
  display:grid;
  gap:4px;
  min-height:76px;
  padding:14px;
  border-radius:var(--radius);
  border:1px solid var(--border-strong);
  background:var(--surface-muted);
  color:var(--muted);
  text-align:left;
  box-shadow:none;
}
.model-test-card .segmented-button strong,
.model-test-card .segmented-button small {
  display:block;
}
.model-test-card .segmented-button strong {
  color:var(--text);
  font-size:15px;
}
.model-test-card .segmented-button small {
  color:var(--muted);
  font-size:12px;
  font-weight:750;
}
.model-test-card .segmented-button.is-active {
  background:var(--primary-soft);
  border-color:var(--primary);
  color:var(--primary);
  box-shadow:inset 0 0 0 1px color-mix(in srgb, var(--primary), transparent 70%);
}
.model-test-card .segmented-button.is-active strong,
.model-test-card .segmented-button.is-active small {
  color:var(--primary);
}
.file-drop {
  display:block;
  margin:14px 0;
  padding:14px;
  border:1px dashed var(--border-strong);
  border-radius:var(--radius);
  background:var(--surface-muted);
  cursor:pointer;
  transition: background .16s ease, border-color .16s ease, transform .12s ease;
}
.file-drop:hover,
.file-drop.is-dragging {
  border-color:var(--primary);
  background:var(--primary-soft);
}
.file-drop.is-dragging {
  transform:translateY(-1px);
}
.file-drop span,
.file-drop small {
  display:block;
}
.file-drop span {
  color:var(--text-strong);
  font-weight:850;
}
.file-drop small {
  margin-top:4px;
  color:var(--muted);
  font-size:13px;
}
.visually-hidden {
  position:absolute;
  width:1px;
  height:1px;
  padding:0;
  margin:-1px;
  overflow:hidden;
  clip:rect(0, 0, 0, 0);
  white-space:nowrap;
  border:0;
}
.sample-schema-note {
  margin-top:12px;
  padding:12px;
  border-radius:var(--radius);
  background:var(--surface);
  border:1px solid var(--border);
  color:var(--muted);
  font-size:13px;
}
.sample-schema-note summary {
  color:var(--text-strong);
  cursor:pointer;
  font-weight:850;
}
.sample-schema-note code {
  display:block;
  margin-top:6px;
  color:var(--primary);
  font-weight:800;
}
.model-test-library {
  margin-top:14px;
}
.model-test-quick-actions {
  display:grid;
  grid-template-columns:repeat(2, minmax(0, 1fr));
  gap:8px;
  margin-top:14px;
}
.model-test-library-row {
  display:grid;
  grid-template-columns:minmax(0, 1fr) auto;
  gap:8px;
}
.model-test-process {
  display:grid;
  grid-template-columns:repeat(4, minmax(0, 1fr));
  gap:6px;
  margin-top:12px;
}
.model-test-process span {
  padding:7px 8px;
  border-radius:var(--radius-sm);
  background:var(--surface-muted);
  color:var(--muted);
  font-size:12px;
  font-weight:850;
  text-align:center;
}
.model-test-process span[data-state="done"] {
  background:var(--success-soft);
  color:var(--success);
}
.model-test-process[data-status="error"] span {
  background:var(--danger-soft);
  color:var(--danger);
}
.model-test-prediction-hero {
  display:grid;
  gap:6px;
  padding:18px;
  margin-bottom:12px;
  border-radius:var(--radius);
  background:linear-gradient(180deg, var(--primary-soft), var(--surface));
  border:1px solid color-mix(in srgb, var(--primary), transparent 72%);
}
.model-test-prediction-hero span {
  color:var(--muted);
  text-transform:uppercase;
  letter-spacing:.06em;
  font-size:12px;
  font-weight:850;
}
.model-test-prediction-hero strong {
  color:var(--text-strong);
  font-size:clamp(40px, 7vw, 76px);
  line-height:.95;
  overflow-wrap:anywhere;
}
.model-test-result-main {
  display:grid;
  grid-template-columns:repeat(3, minmax(0, 1fr));
  gap:10px;
  margin-bottom:14px;
}
.model-test-result-main > div {
  min-width:0;
  padding:12px;
  border-radius:var(--radius);
  background:var(--surface-muted);
}
.model-test-result-main span {
  display:block;
  color:var(--muted);
  text-transform:uppercase;
  letter-spacing:.06em;
  font-size:11px;
  font-weight:850;
}
.model-test-result-main strong {
  display:block;
  margin-top:4px;
  color:var(--text-strong);
  font-size:22px;
  overflow-wrap:anywhere;
}
.model-test-top3-heading {
  margin:2px 0 8px;
  color:var(--muted);
  letter-spacing:.06em;
  font-size:11px;
  font-weight:850;
}
.model-output-card .card-heading strong[data-match="yes"] { color:var(--success); }
.model-output-card .card-heading strong[data-match="no"] { color:var(--danger); }
.model-output-card .card-heading strong[data-match="unknown"] { color:var(--warning); }
.model-test-top3 {
  margin-bottom:12px;
}
.model-sample-meta {
  margin-top:16px;
}
.model-test-faq {
  display:grid;
  grid-template-columns:repeat(2, minmax(0, 1fr));
  gap:10px;
  margin-top:12px;
}
.model-test-faq details {
  border:1px solid var(--border);
  border-radius:var(--radius);
  background:var(--surface);
  padding:10px 12px;
}
.model-test-faq summary {
  color:var(--text-strong);
  cursor:pointer;
  font-weight:850;
  font-size:13px;
}
.model-test-faq p {
  margin:8px 0 0;
  color:var(--muted);
  font-size:13px;
  line-height:1.45;
}

.qr-screen {
  display:grid;
  grid-template-columns:minmax(320px, .86fr) minmax(360px, 1.14fr);
  gap:22px;
  align-items:center;
  min-height:calc(100vh - 140px);
  padding:clamp(20px, 4vw, 44px);
  border:1px solid var(--border);
  border-radius:var(--radius-lg);
  background:var(--surface-raised);
  box-shadow:var(--shadow-sm);
}
.qr-screen[hidden] { display:none; }
.qr-copy h2 {
  margin:8px 0 10px;
  color:var(--text-strong);
  font-size:clamp(34px, 5vw, 64px);
  line-height:1;
}
.qr-copy p {
  margin:0;
  color:var(--muted);
  font-size:17px;
  line-height:1.55;
}
.qr-target-switch {
  display:grid;
  grid-template-columns:repeat(3, minmax(0, 1fr));
  gap:10px;
  margin:20px 0 16px;
}
.qr-target-switch .segmented-button {
  display:grid;
  gap:5px;
  min-height:86px;
  padding:14px;
  border-radius:var(--radius);
  border:1px solid var(--border-strong);
  background:var(--surface-muted);
  text-align:left;
}
.qr-target-switch .segmented-button strong,
.qr-target-switch .segmented-button small {
  display:block;
}
.qr-target-switch .segmented-button strong {
  color:var(--text-strong);
  font-size:14px;
}
.qr-target-switch .segmented-button small {
  color:var(--muted);
  font-size:12px;
  line-height:1.35;
}
.qr-target-switch .segmented-button.is-active {
  background:var(--primary-soft);
  border-color:var(--primary);
}
.qr-target-switch .segmented-button.is-active strong,
.qr-target-switch .segmented-button.is-active small {
  color:var(--primary);
}
.qr-steps {
  display:grid;
  gap:8px;
  margin:0 0 16px;
  padding-left:22px;
  color:var(--text);
}
.qr-steps li {
  padding-left:4px;
}
.qr-actions {
  display:flex;
  flex-wrap:wrap;
  gap:10px;
}
.qr-stage {
  display:grid;
  justify-items:center;
  gap:16px;
}
.qr-frame {
  position:relative;
  display:grid;
  place-items:center;
  width:min(72vw, 520px);
  aspect-ratio:1;
  padding:clamp(18px, 3vw, 34px);
  border-radius:28px;
  background:var(--surface);
  border:1px solid color-mix(in srgb, var(--primary), transparent 62%);
  box-shadow:0 24px 60px color-mix(in srgb, var(--primary), transparent 82%);
  overflow:hidden;
}
.qr-frame::before {
  content:"";
  position:absolute;
  inset:12px;
  border:2px solid color-mix(in srgb, var(--primary), transparent 42%);
  border-radius:22px;
  animation:qrPulse 2.8s ease-in-out infinite;
}
.qr-canvas,
.qr-canvas canvas {
  position:relative;
  z-index:1;
  width:100%;
  height:100%;
  max-width:420px;
  max-height:420px;
  border-radius:18px;
  background:#fff;
}
.qr-canvas {
  display:grid;
  place-items:center;
}
.qr-scanline {
  position:absolute;
  z-index:2;
  left:10%;
  right:10%;
  top:16%;
  height:3px;
  border-radius:var(--pill);
  background:color-mix(in srgb, var(--primary), transparent 18%);
  opacity:.7;
  animation:qrScan 3.2s ease-in-out infinite;
}
.qr-url {
  max-width:min(620px, 90vw);
  padding:12px 16px;
  border-radius:var(--pill);
  background:var(--surface-muted);
  color:var(--text-strong);
  font-weight:850;
  text-align:center;
  overflow-wrap:anywhere;
}
@keyframes qrPulse {
  0%, 100% { transform:scale(.985); opacity:.62; }
  50% { transform:scale(1); opacity:1; }
}
@keyframes qrScan {
  0%, 100% { transform:translateY(0); opacity:.2; }
  50% { transform:translateY(300px); opacity:.82; }
}

.debug-panel { position:fixed; left:14px; bottom:14px; z-index:100; display:flex; flex-wrap:wrap; gap:8px; max-width:min(680px, calc(100% - 28px)); padding:12px; border-radius:var(--radius); background:var(--surface-raised); border:1px solid var(--border); box-shadow:var(--shadow); font-size:12px; }
.debug-panel strong { color:var(--primary); }
.debug-panel span { color:var(--muted); }

@media (max-width: 980px) {
  .topbar { flex-wrap:wrap; height:auto; }
  .brand small { display:none; }

  .model-test-header { flex-direction:column; }
  .model-test-brief { grid-template-columns:1fr; }
  .model-test-grid { grid-template-columns:1fr; }
  .qr-screen { grid-template-columns:1fr; min-height:auto; }
  .qr-target-switch { grid-template-columns:1fr; }
  .model-test-library-row { grid-template-columns:1fr; }
  .model-test-quick-actions { grid-template-columns:1fr; }
  .model-test-result-main { grid-template-columns:repeat(2, minmax(0, 1fr)); }
  .model-test-faq { grid-template-columns:1fr; }
}
@media (max-width: 720px) {
  body { font-size:15px; }

  .workspace { padding:10px; gap:14px; }

  .metric-row { grid-template-columns:1fr; }
  .model-test-card .model-test-task-switch { grid-template-columns:1fr; }
  .model-test-result-main { grid-template-columns:1fr; }
  .model-test-process { grid-template-columns:1fr 1fr; }
  .coach-target { align-items:flex-start; }
  .coach-progress { grid-template-columns: repeat(4, 1fr); }

}
@media (max-width: 420px) {
  .topbar { padding:10px; }
  .brand strong { font-size:16px; }

  .coach-target { flex-direction:column; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
}

/* Overrides: the laptop columns, card padding, and the coach and word cards. */
@media (min-width: 1120px) {
  .workspace {
    grid-template-columns: minmax(680px, 1.85fr) minmax(300px, .72fr);
  }

}

.card {
  padding: 15px;
}

#referenceNote {
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 13px;
}

.coach-mode-switch {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px;
  padding: 4px;
  border-radius: var(--pill);
  background: var(--surface-muted);
  border: 1px solid var(--border);
  margin-bottom: 12px;
}

.segmented-button {
  border-radius: var(--pill);
  padding: 8px 10px;
  background: transparent;
  color: var(--muted);
  font-weight: 800;
  font-size: 13px;
}

.segmented-button.is-active {
  background: var(--surface-raised);
  color: var(--primary);
  box-shadow: var(--shadow-sm);
}

.field-label span {
  color: var(--subtle);
  font-weight: 700;
  text-transform: none;
  letter-spacing: 0;
  margin-left: 6px;
}

.word-group.confusion {
  border-left: 4px solid var(--accent);
}

.word-categories {
  max-height: 260px;
  overflow: auto;
  padding-right: 2px;
}

/* Overrides: a wider camera column on laptops, a denser side panel. */
@media (min-width: 1120px) {
  .workspace {
    grid-template-columns: minmax(740px, 2.25fr) minmax(280px, .62fr);
    gap: 18px;
    max-width: 1600px;
  }

}

@media (min-width: 1440px) {
  .workspace {
    grid-template-columns: minmax(860px, 2.45fr) minmax(300px, .7fr);
  }
}

/* Smaller notes, so the side panel's cards stay short. */
.card-note,
.word-group p,
.word-categories span,
.coach-target p,
.coach-tips li {
  font-size: 13px;
  line-height: 1.42;
}

/* A word target is longer than the letter box is wide: the box grows and the word wraps. */
.coach-card[data-target-type="word"] .coach-target {
  align-items: flex-start;
}
.coach-card[data-target-type="word"] .coach-target span {
  width: auto;
  min-width: 112px;
  max-width: 190px;
  height: auto;
  min-height: 62px;
  padding: 12px 14px;
  font-size: clamp(24px, 2.4vw, 34px);
  line-height: 1.05;
  text-transform: none;
  overflow-wrap: anywhere;
  text-align: center;
}
.coach-card[data-target-type="letter"] .coach-target span {
  text-transform: uppercase;
}

.quality-pills span[data-ok="true"] {
  background: var(--success-soft);
  color: var(--success);
}
.quality-pills span[data-ok="false"] {
  background: var(--warning-soft);
  color: var(--warning);
}

/* The word library is long, so its list scrolls in a shorter box. */
.word-library-card .word-categories {
  max-height: 210px;
}
.word-demo-card .word-group {
  margin-bottom: 8px;
  padding: 10px;
}

@media (max-width: 720px) {

  .coach-card[data-target-type="word"] .coach-target span {
    max-width: 100%;
  }
}

/* Overrides: the dark background, laptop columns, coach flow and collapsible cards. */
body[data-theme="dark"],
.app-shell[data-theme="dark"] {
  background: linear-gradient(180deg, var(--bg), var(--bg-soft));
}

@media (min-width: 1120px) {
  .workspace {
    grid-template-columns: minmax(0, 7fr) minmax(280px, 3fr);
    gap: 18px;
    max-width: 1640px;
  }

}

@media (min-width: 1440px) {
  .workspace {
    grid-template-columns: minmax(0, 7.15fr) minmax(300px, 2.85fr);
  }
}

.coach-flow-switch {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 6px;
  padding: 4px;
  border-radius: var(--pill);
  background: var(--surface-muted);
  border: 1px solid var(--border);
  margin-bottom: 12px;
}

.coach-flow-card {
  margin-top: 12px;
  padding: 12px;
  border-radius: var(--radius);
  background: var(--surface);
  border: 1px solid var(--border);
}

.coach-flow-card strong {
  display: block;
  color: var(--text-strong);
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: .06em;
  margin-bottom: 5px;
}

.coach-flow-card p {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
}

.coach-progress {
  grid-template-columns: repeat(5, 1fr);
}

details.card {
  display: block;
}

.card-summary,
.word-group summary,
.coach-tips summary {
  cursor: pointer;
  list-style: none;
}

.card-summary::-webkit-details-marker,
.word-group summary::-webkit-details-marker,
.coach-tips summary::-webkit-details-marker {
  display: none;
}

.card-summary {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
}

.card-summary span {
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: .06em;
  font-size: 12px;
  font-weight: 850;
}

.card-summary strong {
  color: var(--text-strong);
  font-size: 14px;
}

.word-group summary,
.coach-tips summary {
  color: var(--text-strong);
  font-weight: 800;
  font-size: 14px;
}

.word-group[open] summary,
.coach-tips[open] summary {
  margin-bottom: 6px;
}

.coach-tips ul {
  margin-top: 8px;
}

.word-library-card .word-categories {
  margin-top: 12px;
}

.project-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 18px 0 4px;
}

/* Overrides: the workspace width, its gaps and the phone top bar. */
.app-shell[data-view="app"] .workspace {
  width: min(1880px, calc(100% - 40px));
  padding: 18px 0 28px;
  gap: 18px;
}

.camera-column {
  gap: 10px;
}

#referenceNote {
  max-width: 680px;
}

@media (min-width: 1120px) {
  .app-shell[data-view="app"] .workspace {
    grid-template-columns: minmax(0, 74fr) minmax(260px, 26fr);
  }

}

@media (min-width: 1500px) {
  .app-shell[data-view="app"] .workspace {
    grid-template-columns: minmax(0, 76fr) minmax(280px, 24fr);
  }
}

@media (max-width: 1119px) {
  .app-shell[data-view="app"] .workspace {
    width: min(100%, calc(100% - 24px));
    padding-top: 14px;
  }

}

@media (max-width: 720px) {
  .topbar {
    gap: 8px;
    padding: 8px 10px;
  }

  .brand {
    gap: 9px;
  }

  .brand strong {
    font-size: 16px;
  }

  .app-shell[data-view="app"] .workspace {
    width: min(100%, calc(100% - 16px));
    padding: 10px 0 20px;
    gap: 10px;
  }

  #referenceNote {
    display: none;
  }
}

/* Overrides: the coach and word step rows, the coach guide, the Model Test cards. */

.coach-path,
.word-flow-steps {
  display:grid;
  grid-template-columns:repeat(3, minmax(0, 1fr));
  gap:6px;
  margin:10px 0 12px;
}

.coach-path span,
.word-flow-steps span {
  min-width:0;
  padding:8px 7px;
  border-radius:var(--radius-sm);
  background:var(--surface-muted);
  color:var(--muted);
  font-size:12px;
  font-weight:850;
  text-align:center;
}

.coach-path span[data-state="active"],
.word-flow-steps span[data-state="active"] {
  background:var(--primary-soft);
  color:var(--primary);
}

.coach-path span[data-state="done"],
.word-flow-steps span[data-state="done"] {
  background:var(--success-soft);
  color:var(--success);
}

.coach-card .coach-mode-switch,
.coach-card .coach-flow-switch {
  margin-top:10px;
}

.coach-next-action,
.coach-guide {
  margin-top:12px;
}

.coach-next-action {
  display:grid;
  gap:4px;
  padding:12px;
  border-radius:var(--radius);
  border:1px solid color-mix(in srgb, var(--primary), transparent 68%);
  background:var(--primary-soft);
}

.coach-next-action span {
  color:var(--primary);
  font-size:11px;
  font-weight:900;
  letter-spacing:.08em;
  text-transform:uppercase;
}

.coach-next-action strong {
  color:var(--text-strong);
  font-size:15px;
}

.coach-next-action p {
  margin:0;
  color:var(--muted);
  font-size:13px;
  line-height:1.45;
}

.coach-guide {
  display:grid;
  grid-template-columns:repeat(3, minmax(0, 1fr));
  gap:6px;
}

.coach-guide div {
  min-width:0;
  padding:10px;
  border-radius:var(--radius-sm);
  border:1px solid var(--border);
  background:var(--surface);
}

.coach-guide strong {
  display:block;
  color:var(--text-strong);
  font-size:12px;
  margin-bottom:4px;
}

.coach-guide span {
  display:block;
  color:var(--muted);
  font-size:12px;
  line-height:1.35;
}

.coach-flow-card {
  background:var(--surface-muted);
  border-style:solid;
}

.compact-details,
.word-demo-card,
.model-sample-meta,
.model-test-advanced {
  overflow:hidden;
}

.word-demo-card > .card-summary,
.model-sample-meta > .card-summary,
.model-test-advanced > summary {
  cursor:pointer;
}

.word-demo-card[open] > .card-summary,
.model-sample-meta[open] > .card-summary,
.model-test-advanced[open] > summary {
  margin-bottom:12px;
}

.word-demo-card .word-group {
  margin-bottom:8px;
}

.word-library-card {
  opacity:.96;
}

.model-test-screen {
  max-width:1280px;
  margin:0 auto;
}

.model-test-brief {
  display:none;
}

.model-test-simple-copy {
  margin:0 0 14px;
  color:var(--muted);
  font-size:15px;
  line-height:1.5;
}

.model-test-card .card-heading strong {
  color:var(--success);
}

.model-test-card .button.full.quiet {
  margin-top:8px;
  border-color:var(--border);
  background:var(--surface);
  color:var(--muted);
}

.model-test-card .button.full.quiet:not(:disabled):hover {
  color:var(--primary);
  border-color:var(--primary);
  background:var(--primary-soft);
}

.model-test-card .button.full.quiet:disabled {
  opacity:.62;
}

.model-test-quick-actions {
  grid-template-columns:repeat(2, minmax(0, 1fr));
}

.model-test-quick-actions .button {
  min-height:56px;
  font-size:15px;
}

.model-test-advanced {
  margin-top:12px;
  padding:12px;
  border:1px solid var(--border);
  border-radius:var(--radius);
  background:var(--surface);
}

.model-test-advanced > summary {
  color:var(--text-strong);
  font-weight:850;
}

.model-test-advanced .model-test-task-switch {
  margin-top:12px;
}

.model-test-advanced .card-note {
  margin:10px 0 0;
  padding:10px;
  border-radius:var(--radius);
  background:var(--surface-muted);
}

.model-test-advanced .sample-schema-note {
  margin-top:10px;
  background:var(--surface-muted);
}

.model-sample-meta {
  padding:16px;
}

.model-sample-meta > .card-summary {
  padding:0;
}

.model-sample-meta[open] .card-heading {
  margin-top:8px;
}

@media (max-width: 720px) {

  .coach-path,
  .word-flow-steps {
    grid-template-columns:1fr;
  }

  .model-test-screen {
    padding:14px;
  }

  .model-test-badges,
  .model-test-brief {
    display:none;
  }

  .project-demo-grid,
  .project-model-grid,
  .project-info-grid,
  .coach-guide {
    grid-template-columns:1fr;
  }

  .project-content h2 {
    font-size:34px;
  }

  .model-test-quick-actions {
    grid-template-columns:1fr;
  }

  .model-test-quick-actions .button {
    min-height:50px;
  }

  .model-test-advanced {
    padding:10px;
  }
}

/* Lightbox: the .lightbox classes only. The #lightbox dialog is the
   reference viewer, styled in css/screens-word.css. */
.lightbox {
  position:fixed; inset:0; z-index:9000;
  display:flex; align-items:center; justify-content:center;
  background: color-mix(in srgb, #07070a, transparent 12%);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  padding:24px;
  animation: lightbox-fade-in 0.2s ease-out;
}
.lightbox[hidden] { display:none; }
.lightbox-content {
  position:relative;
  background:var(--surface-raised, #fff);
  border-radius:18px;
  max-width:min(96vw, 1280px);
  max-height:92vh;
  padding:24px 28px 20px;
  display:flex; flex-direction:column; gap:14px;
  box-shadow:0 30px 80px rgba(0,0,0,0.35), 0 0 0 1px var(--border, rgba(0,0,0,0.06));
}
.lightbox-title {
  margin:0;
  font-size:18px; font-weight:700;
  color: var(--text-strong, #1a1a2e);
}
.lightbox-image {
  display:block;
  max-width:100%;
  max-height: calc(92vh - 140px);
  object-fit:contain;
  background: var(--surface-muted, #f0f1f6);
  border-radius:12px;
}
.lightbox-hint {
  margin:0;
  color: var(--muted, #8c909f);
  font-size:13px;
  text-align:center;
}
.lightbox-close {
  position:absolute;
  top:18px; right:18px;
  width:42px; height:42px;
  border-radius:50%;
  border:1px solid var(--border, rgba(0,0,0,0.08));
  background: var(--surface, #fff);
  color: var(--text, #1a1a2e);
  font-size:24px; line-height:1; font-weight:700;
  cursor:pointer;
  display:grid; place-items:center;
  box-shadow:0 4px 16px rgba(0,0,0,0.18);
  z-index:1;
  transition: background-color 0.12s ease, transform 0.12s ease;
}
.lightbox-close:hover { background: var(--surface-muted, #f0f1f6); transform: scale(1.05); }
.lightbox-close:active { transform: scale(0.95); }
.lightbox-close:focus-visible {
  outline:2px solid var(--primary, #4d8eff);
  outline-offset:2px;
}

@keyframes lightbox-fade-in {
  from { opacity:0; }
  to   { opacity:1; }
}

@media (max-width: 640px) {
  .lightbox { padding:12px; }
  .lightbox-content {
    padding:18px 16px 14px;
    border-radius:14px;
    max-height:96vh;
  }
  .lightbox-close {
    top:12px; right:12px;
    width:38px; height:38px;
    font-size:22px;
  }
  .lightbox-image { max-height: calc(96vh - 120px); }
}
}