/* ==========================================================================
   Case Interview Engine — single stylesheet
   1. Theme colors (light + dark)
   2. Base and typography
   3. Layout: header, footer, containers
   4. Components: buttons, tags, forms
   5. Library page
   6. Case page: toolbar, stepper, steps, exhibits, rubric
   7. Utilities and accessibility helpers
   ========================================================================== */

/* 1. Theme colors ------------------------------------------------------- */
/* One accent color (deep teal). All text colors meet WCAG AA contrast. */
:root {
  --bg: #f7f7f5;
  --surface: #ffffff;
  --surface-2: #f0f1ee;
  --text: #1b1f1e;
  --muted: #59625f;
  --border: #dfe2de;
  --accent: #0f766e;
  --accent-strong: #0b5c56;
  --accent-soft: #e5f2f0;
  --on-accent: #ffffff;
  --danger: #b42318;
  --shadow: 0 1px 2px rgb(16 24 22 / 6%), 0 4px 16px rgb(16 24 22 / 5%);
  color-scheme: light;
}

:root[data-theme='dark'] {
  --bg: #0e1312;
  --surface: #151b1a;
  --surface-2: #1c2422;
  --text: #e5eae8;
  --muted: #a2aca9;
  --border: #2b3532;
  --accent: #3cc2b2;
  --accent-strong: #6ad6c9;
  --accent-soft: #14302c;
  --on-accent: #04201c;
  --danger: #ff8a7a;
  --shadow: none;
  color-scheme: dark;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme='light']) {
    --bg: #0e1312;
    --surface: #151b1a;
    --surface-2: #1c2422;
    --text: #e5eae8;
    --muted: #a2aca9;
    --border: #2b3532;
    --accent: #3cc2b2;
    --accent-strong: #6ad6c9;
    --accent-soft: #14302c;
    --on-accent: #04201c;
    --danger: #ff8a7a;
    --shadow: none;
    color-scheme: dark;
  }
}

/* 2. Base and typography ------------------------------------------------- */
:root {
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-serif: 'Iowan Old Style', 'Palatino Linotype', Palatino, Charter, Georgia, serif;
  --radius: 12px;
  --radius-small: 8px;
  --header-h: 60px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
  scroll-padding-top: calc(var(--header-h) + 72px);
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 1.0625rem;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

h1,
h2,
h3 {
  font-family: var(--font-serif);
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.01em;
  margin: 0 0 0.5em;
}
h1 { font-size: clamp(1.9rem, 1.4rem + 2.2vw, 2.75rem); }
h2 { font-size: 1.5rem; }
h3 { font-size: 1.2rem; }

p { margin: 0 0 1em; }

a {
  color: var(--accent);
  text-underline-offset: 0.18em;
}
a:hover { color: var(--accent-strong); }

/* Numbers line up in tables and the timer. */
table,
.timer-time,
.bar-value {
  font-variant-numeric: tabular-nums;
}

/* A clear, consistent keyboard focus ring everywhere. */
:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 2px;
  border-radius: 4px;
}

.muted { color: var(--muted); }

.lede {
  font-size: 1.2rem;
  color: var(--muted);
  max-width: 40rem;
}

/* Long-form text (case sections, About page) */
.prose { max-width: 70ch; }
.prose ul,
.prose ol { padding-left: 1.3em; margin: 0 0 1em; }
.prose li { margin: 0.25em 0; }
.prose li > ul,
.prose li > ol { margin: 0.25em 0; }
.prose strong { font-weight: 650; }
.prose > :last-child { margin-bottom: 0; }

/* 3. Layout ---------------------------------------------------------------- */
.wrap {
  width: min(100% - 2rem, 72rem);
  margin-inline: auto;
}
.wrap-narrow { width: min(100% - 2rem, 48rem); }

main { padding-block: 2rem 4rem; min-height: 70vh; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: saturate(1.4) blur(10px);
  border-bottom: 1px solid var(--border);
}
.header-inner {
  display: flex;
  align-items: center;
  gap: 1rem;
  min-height: var(--header-h);
}
.brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-weight: 650;
  color: var(--text);
  text-decoration: none;
  margin-right: auto;
}
.brand-mark {
  width: 22px;
  height: 22px;
  border-radius: 6px;
  background: var(--accent);
  box-shadow: inset -6px -6px 0 0 color-mix(in srgb, var(--on-accent) 30%, transparent);
}
.site-nav ul {
  display: flex;
  gap: 0.25rem;
  list-style: none;
  margin: 0;
  padding: 0;
}
.site-nav a {
  display: block;
  padding: 0.45rem 0.75rem;
  border-radius: var(--radius-small);
  color: var(--muted);
  text-decoration: none;
  font-weight: 550;
}
.site-nav a:hover { color: var(--text); background: var(--surface-2); }
.site-nav a[aria-current='page'] { color: var(--text); background: var(--surface-2); }

.site-footer {
  border-top: 1px solid var(--border);
  padding-block: 2rem;
  font-size: 0.9rem;
}
.site-footer p { margin: 0.25rem 0; }

.brand span:last-child { white-space: nowrap; }

/* Phones: brand + theme toggle on the first row, navigation on a second,
   horizontally scrollable row (room for more links later). */
@media (max-width: 640px) {
  :root { --header-h: 103px; }
  .header-inner { flex-wrap: wrap; min-height: 0; padding-top: 0.5rem; gap: 0.25rem 0.5rem; }
  .site-nav { order: 3; width: 100%; overflow-x: auto; padding-bottom: 0.35rem; }
  .site-nav a { padding: 0.4rem 0.4rem; font-size: 0.92rem; }
  .site-nav li:first-child a { margin-left: -0.4rem; }
}

/* 4. Components ------------------------------------------------------------ */
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4em;
  min-height: 44px; /* comfortable tap target */
  padding: 0.55rem 1.1rem;
  border: 1px solid var(--accent);
  border-radius: var(--radius-small);
  background: var(--accent);
  color: var(--on-accent);
  font: inherit;
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  text-decoration: none;
  transition: background-color 0.15s, border-color 0.15s;
}
.button:hover { background: var(--accent-strong); border-color: var(--accent-strong); color: var(--on-accent); }
.button-outline { background: transparent; color: var(--accent); }
.button-outline:hover { background: var(--accent-soft); color: var(--accent-strong); }
.button-quiet { background: transparent; color: var(--text); border-color: var(--border); }
.button-quiet:hover { background: var(--surface-2); border-color: var(--border); color: var(--text); }
.button-small { min-height: 36px; padding: 0.3rem 0.8rem; font-size: 0.9rem; }
.button-large { min-height: 52px; padding: 0.7rem 1.6rem; font-size: 1.1rem; }
.button:disabled { opacity: 0.45; cursor: not-allowed; }

.icon-button {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border: 1px solid var(--border);
  border-radius: 50%;
  background: var(--surface);
  color: var(--text);
  cursor: pointer;
}
.icon-button:hover { background: var(--surface-2); }
/* Show the moon in light mode (click → dark) and the sun in dark mode. */
.theme-toggle .icon-sun { display: none; }
.theme-toggle[data-showing='dark'] .icon-sun { display: block; }
.theme-toggle[data-showing='dark'] .icon-moon { display: none; }

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  list-style: none;
  margin: 0;
  padding: 0;
}
.tags li {
  padding: 0.15rem 0.6rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  font-size: 0.82rem;
  color: var(--muted);
  background: var(--surface);
}

.difficulty {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  font-size: 0.85rem;
  font-weight: 600;
}
.dots { display: inline-flex; gap: 3px; }
.dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  border: 1.5px solid var(--accent);
}
.dot.on { background: var(--accent); }

.field { display: flex; flex-direction: column; gap: 0.3rem; }
.field label { font-size: 0.85rem; font-weight: 600; color: var(--muted); }
input[type='search'],
select,
textarea {
  min-height: 44px;
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-small);
  background: var(--surface);
  color: var(--text);
  font: inherit;
  font-size: 1rem;
}
textarea { resize: vertical; }
.field input,
.field select,
.field textarea { width: 100%; min-width: 0; }
input:hover,
select:hover,
textarea:hover { border-color: var(--muted); }

/* 5. Library page ---------------------------------------------------------- */
.hero { padding-block: 1.5rem 1.5rem; }
.hero h1 { max-width: 20ch; }

.filters {
  display: grid;
  grid-template-columns: 2fr repeat(4, 1fr) auto;
  align-items: end;
  gap: 0.75rem;
  padding: 1rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow);
}
@media (max-width: 960px) {
  .filters { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); }
  .field-search { grid-column: 1 / -1; }
  .filters .button { grid-column: 1 / -1; }
}

.result-count { margin: 1.25rem 0 0.75rem; color: var(--muted); font-size: 0.95rem; }

.case-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 20rem), 1fr));
  gap: 1rem;
  list-style: none;
  margin: 0;
  padding: 0;
}
.case-card article {
  position: relative; /* lets the title link cover the whole card */
  display: flex;
  flex-direction: column;
  height: 100%;
  padding: 1.25rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow);
  transition: border-color 0.15s, transform 0.15s;
}
.case-card article:hover { border-color: var(--accent); }
.case-card article:focus-within { border-color: var(--accent); }
.case-card h2 { font-size: 1.2rem; margin-bottom: 0.4rem; }
.card-link { color: var(--text); text-decoration: none; }
.card-link::after { content: ''; position: absolute; inset: 0; border-radius: var(--radius); }
.card-link:focus-visible { outline: none; }
.card-link:focus-visible::after { outline: 3px solid var(--accent); outline-offset: 2px; }
.card-kicker {
  margin: 0 0 0.35rem;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent);
}
.card-summary { color: var(--muted); font-size: 0.95rem; flex: 1; }
.card-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  margin-top: 1rem;
  padding-top: 0.8rem;
  border-top: 1px solid var(--border);
}
.status { font-size: 0.82rem; color: var(--muted); }
.status.done { color: var(--accent); font-weight: 600; }
.empty-state { padding: 2rem; text-align: center; color: var(--muted); }

/* 6. Case page ------------------------------------------------------------- */
.breadcrumb { margin-bottom: 1rem; font-size: 0.95rem; }
.breadcrumb a { text-decoration: none; }
.case-header { margin-bottom: 1.25rem; }
.client { color: var(--muted); margin-bottom: 0.75rem; }
.case-meta { display: flex; flex-wrap: wrap; align-items: center; gap: 0.75rem 1rem; }
.notice {
  margin: 1rem 0 0;
  font-size: 0.85rem;
  color: var(--muted);
}
.notice::before { content: 'ⓘ '; }

/* Toolbar: timer + stepper, sticks under the site header while scrolling. */
.case-toolbar {
  position: sticky;
  top: var(--header-h);
  z-index: 10;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin: 0 -0.5rem 1.5rem;
  padding: 0.6rem 0.5rem;
  background: color-mix(in srgb, var(--bg) 92%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.timer { display: flex; align-items: center; gap: 0.5rem; color: var(--muted); }
.timer-time { font-size: 1.15rem; font-weight: 650; color: var(--text); min-width: 7.5ch; }
.timer.is-running svg { color: var(--accent); }
.timer.is-over .timer-time { color: var(--danger); }

.stepper ol {
  display: flex;
  gap: 0.25rem;
  margin: 0;
  padding: 0;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: none;
}
.stepper button {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  min-height: 36px;
  padding: 0.25rem 0.6rem 0.25rem 0.3rem;
  border: 1px solid transparent;
  border-radius: 999px;
  background: none;
  color: var(--text);
  font: inherit;
  font-size: 0.85rem;
  white-space: nowrap;
  cursor: pointer;
}
.stepper button:hover:not(:disabled) { background: var(--surface-2); }
.stepper button:disabled { color: var(--muted); opacity: 0.6; cursor: default; }
.stepper button[aria-current='step'] { border-color: var(--accent); background: var(--accent-soft); }
.step-num {
  display: inline-grid;
  place-items: center;
  width: 1.6em;
  height: 1.6em;
  border-radius: 50%;
  background: var(--surface-2);
  font-family: var(--font-sans);
  font-size: 0.8em;
  font-weight: 700;
}
.stepper button:not(:disabled) .step-num { background: var(--accent); color: var(--on-accent); }
@media (max-width: 640px) {
  /* On phones show only the active step's name to save space. */
  .stepper button:not([aria-current='step']) .step-name { display: none; }
}

.intro {
  padding: 1.5rem;
  border: 1px dashed var(--border);
  border-radius: var(--radius);
  background: var(--surface);
}

.step {
  padding: 1.5rem;
  margin-bottom: 1.25rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow);
}
.step h2 { display: flex; align-items: center; gap: 0.6rem; }
.step h2 .step-num { background: var(--accent); color: var(--on-accent); font-size: 0.7em; }
.step h2:focus { outline: none; }
.step h2:focus-visible { outline: 3px solid var(--accent); }
.tip {
  font-size: 0.9rem;
  color: var(--muted);
  padding-left: 0.75rem;
  border-left: 3px solid var(--border);
}
.step-actions { margin-top: 1.25rem; display: flex; justify-content: flex-end; }

.prompt-text { font-family: var(--font-serif); font-size: 1.15rem; line-height: 1.65; }

.ask {
  margin: 0 0 1rem;
  padding: 0.9rem 1.1rem;
  border-radius: var(--radius-small);
  background: var(--accent-soft);
  border-left: 4px solid var(--accent);
}
.ask p { margin: 0; }
.ask-label,
.model-label {
  margin: 0 0 0.25rem !important;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent);
}
.model-answer {
  margin-top: 1rem;
  padding: 1.1rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-small);
  background: var(--surface-2);
}

.clarifiers { list-style: none; margin: 0; padding: 0; display: grid; gap: 0.5rem; }
.clarifiers details {
  border: 1px solid var(--border);
  border-radius: var(--radius-small);
  background: var(--surface);
}
.clarifiers summary {
  padding: 0.75rem 1rem;
  font-weight: 600;
  cursor: pointer;
  list-style-position: outside;
  margin-left: 1rem;
}
.clarifiers details[open] summary { border-bottom: 1px solid var(--border); }
.clarifier-answer { padding: 0.75rem 1rem; }

/* Issue tree: nested bullets drawn as a tree with connecting lines. */
.issue-tree ul { list-style: none; padding-left: 1.25rem; position: relative; }
.issue-tree > ul { padding-left: 0; }
.issue-tree ul ul { border-left: 2px solid var(--border); margin-left: 0.4rem; padding-left: 1rem; }
.issue-tree ul ul > li { position: relative; }
.issue-tree ul ul > li::before {
  content: '';
  position: absolute;
  left: -1rem;
  top: 0.85em;
  width: 0.75rem;
  border-top: 2px solid var(--border);
}

/* Tables (exhibits, key numbers, history) */
.table-scroll { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 0.95rem; }
th,
td { padding: 0.55rem 0.75rem; text-align: left; border-bottom: 1px solid var(--border); vertical-align: top; }
thead th { font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.04em; color: var(--muted); }
tbody th { font-weight: 500; }
td { white-space: nowrap; }
.prose table td { white-space: normal; }

.exhibit-block + .exhibit-block { margin-top: 2rem; padding-top: 1.5rem; border-top: 1px dashed var(--border); }
.exhibit {
  margin: 0 0 1rem;
  padding: 1rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-small);
  background: var(--surface);
}
.exhibit-title { font-weight: 650; margin-bottom: 0.75rem; }
.exhibit-title:focus { outline: none; }
.exhibit-number { color: var(--accent); margin-right: 0.25rem; }
.exhibit-note { margin: 0.75rem 0 0; font-size: 0.8rem; color: var(--muted); font-style: italic; }

/* Bar charts (horizontal, HTML-based) */
.bar-chart { position: relative; }
.bars { list-style: none; margin: 0; padding: 0; display: grid; gap: 0.6rem; }
.bar-row { display: grid; grid-template-columns: minmax(6rem, 11rem) 1fr minmax(3.5rem, max-content); align-items: center; gap: 0.75rem; }
.bar-label { font-size: 0.9rem; }
.bar-track { height: 1.4rem; background: var(--surface-2); border-radius: 4px; }
.bar { display: block; height: 100%; background: var(--accent); border-radius: 4px; }
.bar-value { font-weight: 650; text-align: right; font-size: 0.95rem; white-space: nowrap; }
.bar-track { position: relative; }
.ref-mark {
  position: absolute;
  top: -3px;
  bottom: -3px;
  width: 0;
  border-left: 2px dashed var(--text);
  transform: translateX(-1px);
}
.ref-legend { display: flex; align-items: center; gap: 0.5rem; margin: 0.75rem 0 0; font-size: 0.85rem; }
.ref-swatch { width: 0; height: 1rem; border-left: 2px dashed var(--text); }
@media (max-width: 520px) {
  .bar-row { grid-template-columns: 1fr max-content; }
  .bar-label { grid-column: 1 / -1; margin-bottom: -0.4rem; }
}

.key-numbers { margin-top: 1rem; }
.key-numbers summary { cursor: pointer; font-weight: 600; padding: 0.5rem 0; }
.key-numbers td { text-align: right; font-weight: 600; }

/* Debrief */
.answer-line {
  padding: 1rem 1.1rem;
  margin-bottom: 1.25rem;
  border-radius: var(--radius-small);
  background: var(--accent-soft);
  font-family: var(--font-serif);
  font-size: 1.1rem;
}
.answer-line p:last-child { margin: 0; }
.debrief-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; margin-bottom: 1.5rem; }
@media (max-width: 720px) { .debrief-grid { grid-template-columns: 1fr; } }
.debrief-card { padding: 1rem 1.1rem; border: 1px solid var(--border); border-radius: var(--radius-small); }
.creative,
.score { margin-top: 1.75rem; padding-top: 1.5rem; border-top: 1px solid var(--border); }

/* Rubric */
.rubric { display: grid; gap: 1.1rem; }
.score-group { border: 0; margin: 0; padding: 0; }
.score-group legend { padding: 0; margin-bottom: 0.5rem; }
.score-group legend .muted { display: block; font-size: 0.88rem; }
.score-options { display: grid; grid-template-columns: repeat(5, 1fr); gap: 0.4rem; }
.score-option { position: relative; }
.score-option input { position: absolute; opacity: 0; inset: 0; margin: 0; cursor: pointer; }
.score-option span {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 52px;
  padding: 0.3rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-small);
  background: var(--surface);
  text-align: center;
  cursor: pointer;
}
.score-option b { font-size: 1.05rem; }
.score-option small { font-size: 0.7rem; color: var(--muted); line-height: 1.2; }
.score-option input:hover + span { border-color: var(--accent); }
.score-option input:checked + span { background: var(--accent); border-color: var(--accent); color: var(--on-accent); }
.score-option input:checked + span small { color: var(--on-accent); }
.score-option input:focus-visible + span { outline: 3px solid var(--accent); outline-offset: 2px; }
.rubric .button { justify-self: start; }
.form-error { color: var(--danger); font-weight: 600; margin: 0; }
.save-result { font-weight: 600; color: var(--accent); }
.history { margin-top: 1.5rem; }
.history td:last-child { white-space: normal; }

.loading { color: var(--muted); }
.link-list { list-style: none; padding: 0; }
.link-list li { margin: 0.4rem 0; }

/* 7. Utilities and accessibility ----------------------------------------- */
.visually-hidden {
  position: absolute !important;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}
.skip-link {
  position: absolute;
  left: 1rem;
  top: -100px;
  z-index: 100;
  padding: 0.6rem 1rem;
  background: var(--accent);
  color: var(--on-accent);
  border-radius: var(--radius-small);
}
.skip-link:focus { top: 0.5rem; }
[hidden] { display: none !important; }

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; scroll-behavior: auto !important; }
}
.nowrap { white-space: nowrap; }

/* ==========================================================================
   Phase 4: partner mode, progress, drills, frameworks
   ========================================================================== */
.wrap-medium { width: min(100% - 2rem, 60rem); }

.panel {
  margin: 1.5rem 0;
  padding: 1.5rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow);
}
.panel > h2:first-child { margin-top: 0; }
.button-row { display: flex; flex-wrap: wrap; gap: 0.6rem; margin: 1rem 0 0; }
.button.danger { color: var(--danger); }
.file-button { position: relative; }
.file-button:focus-within { outline: 3px solid var(--accent); outline-offset: 2px; }
code {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.9em;
  padding: 0.05em 0.35em;
  border-radius: 4px;
  background: var(--surface-2);
}

/* Mode switch (Practice / Partner) */
.mode-switch {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 0.25rem;
  margin-top: 1rem;
  padding: 0.25rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--surface);
}
.mode-switch a {
  padding: 0.4rem 0.9rem;
  border-radius: 999px;
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 600;
  text-decoration: none;
}
.mode-switch a:hover { color: var(--text); background: var(--surface-2); }
.mode-switch a[aria-current='page'] { background: var(--accent); color: var(--on-accent); }

/* Partner mode */
.partner-intro {
  margin-bottom: 1.25rem;
  padding: 1.25rem 1.5rem;
  border-radius: var(--radius);
  background: var(--accent-soft);
  border: 1px solid color-mix(in srgb, var(--accent) 35%, transparent);
}
.jump-links { display: flex; flex-wrap: wrap; gap: 0.5rem 1rem; list-style: none; margin: 0.5rem 0 0; padding: 0; font-weight: 600; }
.script-item { padding-top: 1.25rem; margin-top: 1.25rem; border-top: 1px solid var(--border); }
.script-item:first-of-type { border-top: 0; margin-top: 0.5rem; padding-top: 0; }
.script-item .model-answer { margin-top: 0.75rem; }
.step-actions-start { justify-content: flex-start; margin: 0 0 1rem; }
.clarifier-list { margin: 0; }
.clarifier-list dt { font-weight: 650; margin-top: 1rem; }
.clarifier-list dt:first-child { margin-top: 0; }
.clarifier-list dd { margin: 0.25rem 0 0; padding-left: 0.9rem; border-left: 3px solid var(--border); }

dialog.present {
  width: min(100% - 2rem, 56rem);
  max-height: calc(100vh - 2rem);
  padding: 0;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--text);
}
dialog.present::backdrop { background: rgb(0 0 0 / 55%); }
.present-inner { padding: 1.25rem; }
.present-bar { display: flex; align-items: center; justify-content: space-between; margin-bottom: 0.75rem; }
.present .exhibit { margin: 0; font-size: 1.1rem; }

/* Stat tiles (progress and drill results) */
.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(9rem, 1fr)); gap: 0.75rem; margin: 1rem 0; }
.stat { padding: 1rem; border: 1px solid var(--border); border-radius: var(--radius-small); background: var(--surface); }
.stat-value { margin: 0; font-family: var(--font-serif); font-size: 1.9rem; font-weight: 600; font-variant-numeric: tabular-nums; }
.stat-value .muted { font-size: 1.1rem; }
.stat-caption { margin: 0; font-size: 0.85rem; color: var(--muted); }
.coverage { display: grid; grid-template-columns: repeat(auto-fill, minmax(14rem, 1fr)); gap: 0.5rem 1.5rem; list-style: none; margin: 0; padding: 0; }
.coverage li { display: flex; justify-content: space-between; padding: 0.4rem 0; border-bottom: 1px solid var(--border); font-variant-numeric: tabular-nums; }
.wrap-cell { white-space: normal; min-width: 12rem; }
.empty-panel { text-align: center; }
.empty-panel .button-row { justify-content: center; }

/* Drills */
.choice-group { border: 0; margin: 0 0 1.25rem; padding: 0; }
.choice-group legend { font-weight: 650; margin-bottom: 0.5rem; padding: 0; }
.choices { display: grid; grid-template-columns: repeat(auto-fill, minmax(11rem, 1fr)); gap: 0.5rem; }
.choices-2 { grid-template-columns: repeat(auto-fill, minmax(14rem, 1fr)); }
.choice { position: relative; }
.choice input { position: absolute; opacity: 0; inset: 0; margin: 0; cursor: pointer; }
.choice span {
  display: flex;
  flex-direction: column;
  height: 100%;
  padding: 0.75rem 0.9rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-small);
  background: var(--surface);
  cursor: pointer;
}
.choice small { color: var(--muted); font-size: 0.82rem; line-height: 1.35; margin-top: 0.15rem; }
.choice input:hover + span { border-color: var(--accent); }
.choice input:checked + span { border-color: var(--accent); background: var(--accent-soft); box-shadow: inset 0 0 0 1px var(--accent); }
.choice input:focus-visible + span { outline: 3px solid var(--accent); outline-offset: 2px; }
.best { margin: 0.75rem 0 0; }

.drill-bar { display: flex; justify-content: space-between; align-items: baseline; gap: 1rem; margin-bottom: 1rem; }
.drill-progress { margin: 0; font-family: var(--font-sans); font-size: 1rem; font-weight: 650; color: var(--muted); font-variant-numeric: tabular-nums; }
.drill-score { margin: 0; font-weight: 650; color: var(--accent); }
.drill-question { display: block; font-family: var(--font-serif); font-size: clamp(1.3rem, 1.1rem + 1vw, 1.7rem); line-height: 1.35; margin-bottom: 1rem; }
.drill-input { display: flex; align-items: center; gap: 0.6rem; }
.drill-input input {
  flex: 1;
  min-width: 0;
  min-height: 56px;
  padding: 0.5rem 0.9rem;
  border: 2px solid var(--border);
  border-radius: var(--radius-small);
  background: var(--surface);
  color: var(--text);
  font: inherit;
  font-size: 1.4rem;
  font-variant-numeric: tabular-nums;
}
.drill-input input:focus { border-color: var(--accent); outline: none; }
.drill-input input:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }
.unit { min-width: 3ch; font-weight: 650; color: var(--muted); }
.feedback { margin-top: 1rem; min-height: 1.6em; }
.feedback.is-correct { color: var(--accent); }
.feedback.is-wrong strong:first-child { color: var(--danger); }
.feedback .muted { display: block; margin-top: 0.25rem; }
.review-list { list-style: none; padding: 0; margin: 0; }
.review-list li { padding: 0.75rem 0; border-bottom: 1px solid var(--border); }
.review-list p { margin: 0; }
[data-results]:focus { outline: none; }

/* Frameworks */
.toc ul { display: flex; flex-wrap: wrap; gap: 0.4rem; list-style: none; margin: 1.5rem 0 0; padding: 0; }
.toc a {
  display: inline-block;
  padding: 0.35rem 0.8rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--surface);
  font-size: 0.9rem;
  font-weight: 600;
  text-decoration: none;
}
.toc a:hover { border-color: var(--accent); }
.framework { max-width: none; }
.framework h3 { margin-top: 1.5rem; }
.framework .lede { font-size: 1.05rem; }
.practice-link { margin-top: 1.5rem; }
.panel.prose { max-width: none; }

@media print {
  .site-header, .site-footer, .toc, .practice-link, .theme-toggle { display: none; }
  .panel { box-shadow: none; break-inside: avoid; }
}