/* === Ember Design System — Core CSS ===
 * Last verified: 2026-04-19
 * Docs: ../references/design-tokens.md
 * Palette: warm cream + chocolate + brown + gold (handcraft editorial)
 */

/* ---------- Section A: Tokens ---------- */
:root {
  /* Colors */
  --ember-bg: #fff2df;
  --ember-bg-subtle: #f5e5c8;
  --ember-text: #312520;
  --ember-text-secondary: #6b5a4f;
  --ember-brown: #492d22;
  --ember-brown-hover: #5c3a2b;
  --ember-gold: #c49464;          /* HAIRLINE/FILL — as text it is 2.18-2.70:1 */
  --ember-gold-ink: #866037;      /* gold as TEXT — 4.52:1 on the hardest ground */
  --ember-divider: #e6d9bf;
  --ember-card: #ffffff;
  --ember-danger: #8b3a2f;

  /* Fonts */
  --font-heading: "Fraunces", Georgia, "Times New Roman", serif;
  --font-body: "Inter", -apple-system, BlinkMacSystemFont, "Helvetica Neue", Arial, sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, Menlo, monospace;

  /* Space */
  --space-1: 4px;  --space-2: 8px;   --space-3: 12px;  --space-4: 16px;
  --space-5: 24px; --space-6: 32px;  --space-7: 48px;  --space-8: 64px;
  --space-9: 80px; --space-10: 120px;

  /* Radii */
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-pill: 9999px;

  /* Shadows (warm brown alpha) */
  --shadow-card: 0 4px 20px rgba(73, 45, 34, 0.08);
  --shadow-pop: 0 12px 40px rgba(73, 45, 34, 0.12);

  /* Motion */
  --ease-ember: cubic-bezier(0.32, 0.72, 0, 1);
  --duration-sm: 240ms;
  --duration-md: 400ms;
  --duration-lg: 700ms;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.6;
  color: var(--ember-text);
  background: var(--ember-bg);
  -webkit-font-smoothing: antialiased;
}

/* ---------- Section B: Typography ---------- */
h1, h2, h3, h4, h5 {
  font-family: var(--font-heading);
  margin: 0;
  font-weight: 600;
  /* Fraunces variable axes: softness + ink-trap */
  font-variation-settings: "SOFT" 50, "opsz" 144;
}
h1 { font-size: 60px; line-height: 1.08; letter-spacing: -0.01em; }
h2 { font-size: 40px; line-height: 1.15; letter-spacing: -0.005em; }
h3 { font-size: 24px; line-height: 1.3; font-weight: 500; }
h4 { font-size: 20px; line-height: 1.4; font-weight: 500; }
p  { margin: 0 0 var(--space-4); }
.ember-lead { font-size: 19px; line-height: 1.55; }
.ember-caption { font-size: 13px; line-height: 1.45; color: var(--ember-text-secondary); font-style: italic; }

/* ---------- Section C: Link & Button ---------- */
.ember-link {
  color: var(--ember-brown);
  text-decoration: underline;
  text-underline-offset: 0.22em;
  text-decoration-thickness: 1px;
  text-decoration-color: var(--ember-gold);
  transition: color var(--duration-sm) var(--ease-ember), text-decoration-color var(--duration-sm);
}
.ember-link:hover {
  color: var(--ember-brown-hover);
  text-decoration-color: var(--ember-brown);
}
.ember-link::after { content: " \2192"; color: var(--ember-gold-ink); }
.ember-link--no-arrow::after { content: none; }

.ember-button {
  display: inline-block;
  padding: 14px 28px;
  border-radius: var(--radius-pill);
  background: var(--ember-brown);
  color: #ffffff;
  font-family: var(--font-body);
  font-weight: 500;
  font-size: 15px;
  letter-spacing: 0.01em;
  text-decoration: none;
  border: 0;
  cursor: pointer;
  transition: background var(--duration-sm) var(--ease-ember), transform var(--duration-sm);
}
.ember-button:hover {
  background: var(--ember-brown-hover);
  transform: translateY(-1px);
}
.ember-button--ghost {
  background: transparent;
  color: var(--ember-brown);
  border: 1px solid var(--ember-brown);
}
.ember-button--ghost:hover {
  background: var(--ember-brown);
  color: #ffffff;
}
.ember-button--gold {
  background: var(--ember-gold);
  color: var(--ember-text);
}
.ember-button--gold:hover { background: #b28454; }

/* ---------- Section D: Layout ---------- */
.ember-container {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 var(--space-5);
}
.ember-container--narrow { max-width: 720px; }
.ember-container--wide { max-width: 1200px; }

.ember-section { padding-block: var(--space-9); }
.ember-section--subtle { background: var(--ember-bg-subtle); }
.ember-section--dark {
  background: var(--ember-text);
  color: var(--ember-bg);
}
.ember-section--dark h1,
.ember-section--dark h2,
.ember-section--dark h3 { color: var(--ember-bg); }

.ember-hero {
  text-align: center;
  padding-block: var(--space-10);
}

.ember-card {
  background: var(--ember-card);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  padding: var(--space-6);
}
.ember-card--subtle {
  background: var(--ember-bg-subtle);
  box-shadow: none;
  border: 1px solid var(--ember-divider);
}

/* ---------- Section E: Stat ---------- */
.ember-stat { text-align: center; }
.ember-stat-number {
  display: block;
  font-family: var(--font-heading);
  font-size: 72px;
  line-height: 1;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--ember-brown);
}
.ember-stat-label {
  display: block;
  font-size: 14px;
  color: var(--ember-text-secondary);
  margin-top: var(--space-3);
  font-style: italic;
  max-width: 220px;
  margin-inline: auto;
}

/* ---------- Section F: Nav ---------- */
.ember-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  height: 72px;
  background: rgba(255, 242, 223, 0.85);
  -webkit-backdrop-filter: blur(16px);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--ember-divider);
}
.ember-nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-5);
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.ember-nav-brand {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 18px;
  color: var(--ember-text);
  text-decoration: none;
  letter-spacing: -0.01em;
}
.ember-nav a {
  color: var(--ember-text);
  font-size: 14px;
  text-decoration: none;
  margin-right: var(--space-5);
  transition: color var(--duration-sm);
}
.ember-nav a.ember-button {
  color: #ffffff;
  text-decoration: none;
}
.ember-nav a:hover { color: var(--ember-brown); }
.ember-nav a.ember-button:hover { color: #ffffff; }

/* ---------- Section G: Footer ---------- */
.ember-footer {
  background: var(--ember-bg-subtle);
  padding-block: var(--space-8);
  font-size: 13px;
  color: var(--ember-text-secondary);
  border-top: 1px solid var(--ember-divider);
}
.ember-footer-grid {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-5);
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: var(--space-6);
}
.ember-footer-group h5 {
  font-family: var(--font-heading);
  font-size: 14px;
  color: var(--ember-text);
  margin-bottom: var(--space-3);
  font-weight: 600;
}
.ember-footer-group a {
  display: block;
  color: var(--ember-text-secondary);
  text-decoration: none;
  margin-bottom: var(--space-2);
}
.ember-footer-group a:hover {
  color: var(--ember-brown);
  text-decoration: underline;
}
.ember-footer-legal {
  max-width: 1200px;
  margin: var(--space-7) auto 0;
  padding: var(--space-5) var(--space-5) 0;
  border-top: 1px solid var(--ember-divider);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-4);
}

/* ---------- Section H: Badge / Quote / Divider / Banner ---------- */
.ember-badge {
  display: inline-block;
  font-family: var(--font-body);
  font-size: 12px;
  font-weight: 500;
  padding: 4px 12px;
  border-radius: var(--radius-pill);
  background: var(--ember-brown);
  color: var(--ember-bg);
  letter-spacing: 0.03em;
  text-transform: uppercase;
}
.ember-badge--gold { background: var(--ember-gold); color: var(--ember-text); }
.ember-badge--ghost {
  background: transparent;
  color: var(--ember-brown);
  border: 1px solid var(--ember-divider);
}

.ember-quote {
  font-family: var(--font-heading);
  font-style: italic;
  font-size: 26px;
  line-height: 1.45;
  color: var(--ember-text);
  padding-left: 0;
  max-width: 720px;
  margin: var(--space-7) auto;
  text-align: left;
  position: relative;
}
.ember-quote::before {
  content: "“";
  position: absolute;
  left: -0.6em;
  top: -0.2em;
  font-size: 4em;
  line-height: 1;
  color: var(--ember-gold-ink);
  font-family: var(--font-heading);
}
.ember-quote-cite {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-top: var(--space-5);
  font-family: var(--font-body);
  font-style: normal;
  font-size: 14px;
  color: var(--ember-text-secondary);
}

.ember-divider {
  border: 0;
  height: 1px;
  background: var(--ember-divider);
  margin: var(--space-8) 0;
  position: relative;
}
.ember-divider--ornament {
  text-align: center;
  background: transparent;
  height: auto;
  border: 0;
}
.ember-divider--ornament::before {
  content: "·  ·  ·";
  color: var(--ember-gold-ink);
  letter-spacing: 0.5em;
  font-size: 20px;
}

.ember-banner {
  background: var(--ember-bg-subtle);
  padding: var(--space-3) var(--space-5);
  border-radius: var(--radius-md);
  border: 1px solid var(--ember-divider);
  font-size: 14px;
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

/* ---------- Section I: Forms ---------- */
.ember-input, .ember-select, .ember-textarea {
  width: 100%;
  background: var(--ember-card);
  border: 1px solid var(--ember-divider);
  border-radius: var(--radius-md);
  padding: 12px 16px;
  font-family: var(--font-body);
  font-size: 15px;
  color: var(--ember-text);
}
.ember-input:focus, .ember-select:focus, .ember-textarea:focus {
  outline: 2px solid var(--ember-brown);
  outline-offset: 0;
  border-color: transparent;
}
.ember-radio, .ember-checkbox {
  accent-color: var(--ember-brown);
  width: 18px;
  height: 18px;
}
.ember-label {
  display: block;
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 500;
  color: var(--ember-text);
  margin-bottom: var(--space-2);
}

/* ---------- Section J: Tabs, Details, Code, Admonition ---------- */
.ember-tabs {
  display: flex;
  gap: var(--space-5);
  border-bottom: 1px solid var(--ember-divider);
}
.ember-tab {
  background: transparent;
  border: 0;
  padding: var(--space-3) 0;
  font-family: var(--font-body);
  font-size: 14px;
  color: var(--ember-text-secondary);
  cursor: pointer;
  border-bottom: 2px solid transparent;
  transition: color var(--duration-sm), border-bottom-color var(--duration-sm);
}
.ember-tab.is-active {
  color: var(--ember-brown);
  border-bottom-color: var(--ember-gold);
}

.ember-details {
  background: var(--ember-bg-subtle);
  border-radius: var(--radius-md);
  padding: var(--space-4) var(--space-5);
  margin: var(--space-3) 0;
  border: 1px solid var(--ember-divider);
}
.ember-details summary {
  cursor: pointer;
  font-family: var(--font-heading);
  font-weight: 500;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.ember-details summary::after {
  content: "+";
  color: var(--ember-gold-ink);
  font-size: 20px;
  font-weight: 300;
  transition: transform var(--duration-sm);
}
.ember-details[open] summary::after { content: "−"; }

.ember-code, pre.ember-code {
  font-family: var(--font-mono);
  font-size: 14px;
  background: var(--ember-text);
  color: #f5e5c8;
  border-radius: var(--radius-md);
  padding: var(--space-6);
  overflow-x: auto;
}
code {
  font-family: var(--font-mono);
  font-size: 0.92em;
  background: var(--ember-bg-subtle);
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  color: var(--ember-brown);
}
kbd {
  font-family: var(--font-mono);
  font-size: 12px;
  background: var(--ember-card);
  border: 1px solid var(--ember-divider);
  padding: 2px 6px;
  border-radius: var(--radius-sm);
}
mark { background: rgba(196, 148, 100, 0.32); color: inherit; }

.ember-admonition {
  background: var(--ember-card);
  border-left: 4px solid var(--ember-gold);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  padding: var(--space-5);
  margin: var(--space-5) 0;
}
.ember-admonition h5 {
  font-family: var(--font-heading);
  font-weight: 500;
  font-size: 14px;
  margin: 0 0 var(--space-2);
  color: var(--ember-gold-ink);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.ember-admonition--warning { border-left-color: var(--ember-gold); }
.ember-admonition--success h5 { color: #6b8e5a; }
.ember-admonition--success { border-left-color: #6b8e5a; }
.ember-admonition--danger h5 { color: var(--ember-danger); }
.ember-admonition--danger { border-left-color: var(--ember-danger); }

/* ---------- Section K: Breadcrumbs / Table / Reveal ---------- */
.ember-breadcrumbs {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  font-size: 13px;
  color: var(--ember-text-secondary);
}
.ember-breadcrumbs li::after {
  content: "/";
  margin-left: var(--space-2);
  color: var(--ember-divider);
}
.ember-breadcrumbs li:last-child::after { content: none; }
.ember-breadcrumbs a { color: inherit; text-decoration: none; }
.ember-breadcrumbs a:hover { color: var(--ember-brown); }

.ember-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 15px;
}
.ember-table th {
  text-align: left;
  padding: 12px 16px;
  background: var(--ember-bg-subtle);
  font-family: var(--font-heading);
  font-weight: 500;
  color: var(--ember-text);
  border-bottom: 1px solid var(--ember-divider);
}
.ember-table td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--ember-divider);
}
.ember-table tr:hover td { background: rgba(196, 148, 100, 0.08); }

.ember-reveal {
  opacity: 0;
  transform: translateY(16px);
  transition:
    opacity var(--duration-lg) var(--ease-ember),
    transform var(--duration-lg) var(--ease-ember);
}
.ember-reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- Section L: Responsive + a11y ----------
 * Phone layout. The card grids that overflow at 375px live in each page's
 * embedded <style> (.use-grid, .feat-row, …); the collapse rules below
 * override them at equal specificity via !important, so the rollout is
 * CSS-only and reaches every page that links this sheet. Genuinely wide figures
 * pan via an opt-in .ember-scroll wrapper (strategy A); hero product mocks
 * scale to fit so the whole window stays visible. */
@media (max-width: 768px) {
  /* Type — fluid headings, 16px reading floor. !important so the per-page
     inline font-sizes (style="font-size:96px" on hero headings) scale down
     too — without it an inline size wins over this media query and overflows. */
  h1 { font-size: clamp(32px, 8.6vw, 40px) !important; line-height: 1.14; }
  h2 { font-size: clamp(25px, 6.4vw, 30px) !important; }
  h3 { font-size: 20px !important; }
  body { font-size: 16px; }
  .ember-stat-number { font-size: clamp(40px, 12vw, 56px); }
  .ember-quote { font-size: clamp(20px, 6vw, 24px); }

  /* Sections + containers breathe less on a phone */
  .ember-section { padding-block: var(--space-7); }
  .ember-container, .ember-container--wide, .ember-container--narrow {
    padding-left: var(--space-4);
    padding-right: var(--space-4);
  }

  /* Collapse page-local multi-column grids so nothing scrolls sideways. The
     full class list is generated from every page's embedded <style>; a class
     absent from a given page is simply inert. Content & label/value rows go to
     one column; compact numeric strips stay two-up. */
  .feat-grid, .feat-row, .use-grid, .use-grid3, .use-tile, .tier-grid, .ref-grid,
  .member-grid, .team-grid, .canon-row, .test-row, .channel-row, .chord-grid,
  .scenarios, .scenario, .post-grid, .pd-sibling__grid, .pd-use__grid,
  .pd-sibling__row, .pd-spec__row, .faq-group, .faq-sum, .log-entry, .log-month,
  .detail-row, .spec-row, .kbd-row, .lineup-row, .lineup-grid, .limit-item,
  .craft-rule, .ship-rule, .quickstart, .palette-split, .overlap-grid, .two-col,
  .featured, .cards-2, .comp-grid, .side-col, .support-grid, .pillar-spine,
  .stat-strip, .glance-strip, .giant-stats, .cadence-stats, .pd-glance,
  .stat-trio, .faq-stats, .kpi-row, .exec-strip, .status-grid, .pagination {
    grid-template-columns: 1fr !important;
  }
  /* inline splits (style="grid-template-columns:2fr 3fr") collapse too */
  [style*="grid-template-columns"] { grid-template-columns: 1fr !important; }
  .ember-footer-grid { grid-template-columns: repeat(2, 1fr); }
  /* children must shrink, or their min-content re-widens the row */
  [class*="grid"] > *, [class*="row"] > *, [class*="strip"] > *,
  [class*="stat"] > *, [class*="glance"] > *, [class*="scenario"] > * { min-width: 0; }
  /* long unbreakable tokens (file paths in <code>, URLs) wrap, not overflow */
  code, kbd { overflow-wrap: anywhere; }

  /* Nav links wrap instead of overflowing (no JS burger on this skill) */
  .ember-nav-inner, .ember-nav-inner > div { flex-wrap: wrap; gap: var(--space-3); row-gap: var(--space-2); }

  /* Opt-in pan wrapper for genuinely wide figures (strategy A): wrap the <svg>
     in <div class="ember-scroll"> to keep a readable width and pan on a phone.
     Hero product mocks scale-to-fit instead — the whole window stays visible,
     and their own overflow:hidden (rounded corners) would fight a pan anyway. */
  .ember-scroll { overflow-x: auto; -webkit-overflow-scrolling: touch; }
  .ember-scroll > svg { min-width: 720px; }

  /* Wide tables + code blocks pan inside their own box; table columns stay
     aligned (min-width:max-content keeps display:table, parent does the scroll) */
  :is(div, section, figure):has(> table) {
    overflow-x: auto; -webkit-overflow-scrolling: touch;
  }
  .cmp-table { min-width: -webkit-max-content; min-width: max-content; }
  .ember-code { overflow-x: auto; -webkit-overflow-scrolling: touch; }
}
@media (min-width: 769px) and (max-width: 1024px) {
  h1 { font-size: 48px; }
  .ember-footer-grid { grid-template-columns: repeat(3, 1fr); }
}

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

:focus-visible {
  outline: 2px solid var(--ember-brown);
  outline-offset: 2px;
  border-radius: 2px;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}