/* Yānqīthā — one design-token layer (docs/VISUAL.md §3, §4, §8). Dark onyx/charcoal glass, gold for the primary
   hierarchy, crimson only for selected outlines and focus, angular clipped corners, restrained glow. */
:root {
  /* palette (yan.vis §3) */
  --onyx: #0e1118;
  --charcoal: #1c222c;
  --graphite: #303a46;
  --crimson: #e83d4c;
  --deep-red: #8c202b;
  --gold: #e7b94d;
  --warm-gold: #f9d780;
  --platinum: #d9e3e9;
  --text: #f4f6f8;
  --text-2: #aab4c0;
  --ok: #7fd4a0;
  --warn: #f2b35a;
  /* surfaces */
  --glass: rgba(28, 34, 44, 0.78);
  --glass-strong: rgba(28, 34, 44, 0.94);
  --glass-edge: rgba(217, 227, 233, 0.14);
  /* geometry */
  --cut: 14px;
  --cut-sm: 8px;
  --radius-pill: 999px;
  --border: 1px;
  --border-strong: 2px;
  /* elevation */
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.45);
  --glow-gold: 0 0 0 1px rgba(231, 185, 77, 0.35), 0 0 18px rgba(231, 185, 77, 0.18);
  --glow-red: 0 0 16px rgba(232, 61, 76, 0.22);
  /* motion (§8) */
  --fast: 180ms;
  --panel: 320ms;
  /* type (§5) */
  --font: system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --display: 'Palatino Linotype', 'Book Antiqua', Palatino, Georgia, 'Times New Roman', serif;
  --mono: ui-monospace, 'Cascadia Mono', Consolas, monospace;
  color-scheme: dark;
}
* {
  box-sizing: border-box;
}
html {
  background: var(--onyx);
}
body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(1200px 500px at 85% -10%, rgba(140, 32, 43, 0.22), transparent 60%),
    radial-gradient(900px 500px at 0% 0%, rgba(231, 185, 77, 0.06), transparent 60%), var(--onyx);
  color: var(--text);
  font: 16px/1.55 var(--font);
}
a {
  color: var(--warm-gold);
  text-underline-offset: 3px;
}
a:hover {
  color: var(--gold);
}
:focus-visible {
  outline: 3px solid var(--crimson);
  outline-offset: 2px;
}
h1,
h2,
h3 {
  line-height: 1.2;
  margin: 0 0 0.5em;
}
h1 {
  font-size: clamp(28px, 4vw, 40px);
}
h2 {
  font-size: clamp(20px, 2.4vw, 26px);
}
h3 {
  font-size: 18px;
}
p {
  margin: 0 0 1em;
}
code,
.mono {
  font-family: var(--mono);
  font-size: 0.9em;
  overflow-wrap: anywhere;
}
.muted {
  color: var(--text-2);
}
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}
.skip {
  position: absolute;
  left: -999px;
  top: 8px;
  z-index: 10;
  background: var(--gold);
  color: var(--onyx);
  padding: 8px 14px;
}
.skip:focus {
  left: 8px;
}
.wrap {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 16px;
}

/* ---------- header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 5;
  background: linear-gradient(180deg, rgba(14, 17, 24, 0.97), rgba(14, 17, 24, 0.86));
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--glass-edge);
}
.bar {
  display: flex;
  align-items: center;
  gap: 14px;
  min-height: 64px;
  flex-wrap: wrap;
  padding: 8px 0;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--text);
  margin-right: auto;
}
.brand img {
  width: 38px;
  height: 38px;
}
.brand span {
  font: 600 24px/1 var(--display);
  letter-spacing: 0.02em;
  color: var(--warm-gold);
}
.search {
  display: flex;
  gap: 6px;
  flex: 1 1 260px;
  max-width: 420px;
}
.search input {
  flex: 1;
}
.nav {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  list-style: none;
  margin: 0;
  padding: 0 0 10px;
}
.tab {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 44px;
  padding: 8px 18px;
  color: var(--text-2);
  text-decoration: none;
  background: var(--glass);
  border: var(--border) solid var(--graphite);
  clip-path: polygon(10px 0, 100% 0, calc(100% - 10px) 100%, 0 100%);
  transition:
    color var(--fast),
    border-color var(--fast),
    box-shadow var(--fast);
}
.tab:hover {
  color: var(--text);
  border-color: var(--crimson);
}
.tab[aria-current='page'] {
  color: var(--gold);
  border: var(--border-strong) solid var(--gold);
  box-shadow: var(--glow-gold);
}

/* ---------- controls ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 44px;
  padding: 10px 20px;
  font: 600 15px/1.2 var(--font);
  color: var(--text);
  background: var(--charcoal);
  border: var(--border) solid var(--graphite);
  text-decoration: none;
  cursor: pointer;
  clip-path: polygon(var(--cut-sm) 0, 100% 0, 100% calc(100% - var(--cut-sm)), calc(100% - var(--cut-sm)) 100%, 0 100%, 0 var(--cut-sm));
  transition:
    border-color var(--fast),
    color var(--fast),
    box-shadow var(--fast);
}
.btn:hover {
  border-color: var(--crimson);
}
.btn-gold {
  color: var(--warm-gold);
  border: var(--border-strong) solid var(--gold);
}
.btn-gold:hover {
  color: var(--onyx);
  background: var(--gold);
}
.btn-red {
  color: var(--text);
  border: var(--border-strong) solid var(--crimson);
  background: linear-gradient(180deg, rgba(140, 32, 43, 0.55), rgba(28, 34, 44, 0.9));
}
.btn-quiet {
  background: transparent;
}
.btn[disabled],
.btn[aria-disabled='true'] {
  opacity: 0.55;
  cursor: not-allowed;
  border-color: var(--graphite);
}
.signin {
  color: var(--warm-gold);
  border: var(--border-strong) solid var(--crimson);
}
input,
select,
textarea {
  min-height: 44px;
  width: 100%;
  padding: 10px 12px;
  font: inherit;
  color: var(--text);
  background: rgba(14, 17, 24, 0.85);
  border: var(--border) solid var(--graphite);
}
input:focus,
select:focus,
textarea:focus {
  border-color: var(--crimson);
  outline: 2px solid var(--crimson);
  outline-offset: 0;
}
label {
  display: grid;
  gap: 6px;
  font-weight: 600;
  color: var(--warm-gold);
}
label .hint {
  font-weight: 400;
  color: var(--text-2);
  font-size: 14px;
}
fieldset {
  border: var(--border) solid var(--graphite);
  padding: 12px 14px;
  margin: 0;
}
legend {
  color: var(--warm-gold);
  font-weight: 600;
  padding: 0 6px;
}
.check {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  color: var(--text);
  font-weight: 400;
}
.check input {
  width: 22px;
  min-height: 22px;
  margin-top: 2px;
}
.form {
  display: grid;
  gap: 16px;
}
.row {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  align-items: center;
}

/* ---------- glass panels (angular, clipped corners, §4) ---------- */
.panel {
  position: relative;
  background: var(--glass);
  border: var(--border) solid var(--glass-edge);
  padding: 20px;
  box-shadow:
    var(--shadow),
    inset 0 1px 0 rgba(217, 227, 233, 0.08);
  clip-path: polygon(var(--cut) 0, 100% 0, 100% calc(100% - var(--cut)), calc(100% - var(--cut)) 100%, 0 100%, 0 var(--cut));
}
.panel.selected,
.panel.red {
  border-color: rgba(232, 61, 76, 0.75);
}
.panel.gold {
  border: var(--border-strong) solid var(--gold);
}
.grid {
  display: grid;
  gap: 18px;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
}
.grid-2 {
  display: grid;
  gap: 18px;
  grid-template-columns: 1fr 1fr;
}
@media (max-width: 860px) {
  .grid-2 {
    grid-template-columns: 1fr;
  }
}
main {
  padding: 24px 0 48px;
}
section + section {
  margin-top: 28px;
}

/* ---------- hero (Figure 1) ---------- */
.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  gap: 0;
  border: var(--border-strong) solid var(--gold);
  box-shadow: var(--glow-gold);
  padding: 0;
  overflow: hidden;
}
.hero .copy {
  padding: 36px 32px;
  display: grid;
  align-content: center;
  gap: 14px;
}
.hero h1 {
  font: 700 clamp(30px, 4.4vw, 46px) / 1.08 var(--display);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin: 0;
}
.hero .sub {
  font: 700 clamp(18px, 2.4vw, 26px) / 1.15 var(--display);
  color: var(--gold);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.hero .art {
  min-height: 300px;
  background: center / cover no-repeat url('/brand/hero-city.webp');
  border-left: 1px solid rgba(232, 61, 76, 0.5);
}
@media (max-width: 860px) {
  .hero {
    grid-template-columns: 1fr;
  }
  .hero .art {
    min-height: 220px;
    border-left: 0;
    border-top: 1px solid rgba(232, 61, 76, 0.5);
  }
}

/* ---------- status, seal, facts ---------- */
.status {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 2px 10px;
  border: 1px solid var(--graphite);
  border-radius: var(--radius-pill);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.02em;
}
.status.issued,
.status.ok {
  color: var(--ok);
  border-color: rgba(127, 212, 160, 0.5);
}
.status.redeemed {
  color: var(--warm-gold);
  border-color: rgba(231, 185, 77, 0.5);
}
.status.revoked,
.status.failed {
  color: #ff8a95;
  border-color: rgba(232, 61, 76, 0.6);
}
.status.pending,
.status.held {
  color: var(--warn);
  border-color: rgba(242, 179, 90, 0.5);
}
.sample-tag {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--onyx);
  background: var(--warm-gold);
  padding: 1px 8px;
}
.seal {
  display: flex;
  align-items: center;
  gap: 16px;
}
.seal img {
  width: 76px;
  height: 76px;
}
.facts {
  display: grid;
  grid-template-columns: max-content 1fr;
  gap: 8px 18px;
  margin: 0;
}
.facts dt {
  color: var(--text-2);
}
.facts dd {
  margin: 0;
  overflow-wrap: anywhere;
}
.timeline {
  list-style: none;
  margin: 0;
  padding: 0 0 0 18px;
  border-left: 2px solid var(--graphite);
}
.timeline li {
  position: relative;
  padding: 0 0 14px 12px;
}
.timeline li::before {
  content: '';
  position: absolute;
  left: -25px;
  top: 6px;
  width: 12px;
  height: 12px;
  background: var(--gold);
  clip-path: polygon(50% 0, 100% 50%, 50% 100%, 0 50%);
}
.note {
  border-left: 3px solid var(--gold);
  padding: 10px 14px;
  background: rgba(231, 185, 77, 0.07);
}
.note.red {
  border-left-color: var(--crimson);
  background: rgba(232, 61, 76, 0.08);
}
.banner {
  font-size: 14px;
  text-align: center;
  padding: 6px 12px;
  background: rgba(140, 32, 43, 0.35);
  border-bottom: 1px solid rgba(232, 61, 76, 0.4);
}
.mock-banner {
  border: 2px dashed var(--warm-gold);
  padding: 8px 12px;
  color: var(--warm-gold);
}
.persona-grid {
  display: grid;
  gap: 12px;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
}
.ok {
  color: var(--ok);
}
.warn {
  color: var(--warn);
}
.card {
  display: grid;
  gap: 8px;
  text-decoration: none;
  color: var(--text);
}
.card h3 {
  color: var(--warm-gold);
  margin: 0;
}
.card:hover {
  border-color: rgba(232, 61, 76, 0.75);
}
.thumb {
  aspect-ratio: 16/10;
  background:
    linear-gradient(135deg, rgba(231, 185, 77, 0.22), rgba(140, 32, 43, 0.3)),
    repeating-linear-gradient(45deg, rgba(217, 227, 233, 0.05) 0 8px, transparent 8px 16px);
  display: grid;
  place-items: center;
  font: 700 28px var(--display);
  color: var(--warm-gold);
  border: 1px solid var(--glass-edge);
}
.kitha {
  display: flex;
  gap: 20px;
  align-items: center;
}
.kitha img {
  width: 180px;
  height: auto;
  border: 1px solid var(--glass-edge);
  clip-path: polygon(var(--cut) 0, 100% 0, 100% calc(100% - var(--cut)), calc(100% - var(--cut)) 100%, 0 100%, 0 var(--cut));
}
@media (max-width: 600px) {
  .kitha {
    flex-direction: column;
    align-items: flex-start;
  }
  .kitha img {
    width: 140px;
  }
}
table {
  width: 100%;
  border-collapse: collapse;
  font-size: 15px;
}
th,
td {
  text-align: left;
  padding: 8px 10px;
  border-bottom: 1px solid var(--graphite);
  vertical-align: top;
}
th {
  color: var(--text-2);
  font-weight: 600;
}
.table-wrap {
  overflow-x: auto;
}
.chart svg {
  width: 100%;
  height: auto;
  display: block;
}
.legend {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  font-size: 13px;
  color: var(--text-2);
  list-style: none;
  padding: 0;
  margin: 8px 0 0;
}
.legend i {
  display: inline-block;
  width: 12px;
  height: 12px;
  margin-right: 6px;
  vertical-align: -1px;
}
.site-footer {
  border-top: 1px solid var(--glass-edge);
  padding: 20px 0 40px;
  color: var(--text-2);
  font-size: 14px;
}
.site-footer nav {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}
.drop-zone {
  border: 2px dashed rgba(232, 61, 76, 0.6);
  padding: 20px;
  text-align: center;
  color: var(--text-2);
}
.steps {
  display: grid;
  gap: 10px;
  counter-reset: step;
  list-style: none;
  padding: 0;
}
.steps li {
  counter-increment: step;
  padding-left: 40px;
  position: relative;
}
.steps li::before {
  content: counter(step);
  position: absolute;
  left: 0;
  top: 0;
  width: 28px;
  height: 28px;
  display: grid;
  place-items: center;
  border: 1px solid var(--gold);
  color: var(--gold);
  font-weight: 700;
}
.steps li.done::before {
  background: var(--gold);
  color: var(--onyx);
}
@media (prefers-reduced-motion: reduce) {
  * {
    transition: none !important;
    animation: none !important;
    scroll-behavior: auto !important;
  }
}