/* ========================================================================
   艾乐棋牌局 · 全站共享样式 /assets/site.css
   暖纸色纸面 + 胡桃木棕牌桌 + 艾草绿结构 + 筹码金 / 牌桌红点缀
   ======================================================================== */

/* ---------- 1. Reset ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 96px;
}

body,
h1, h2, h3, h4, h5, h6,
p, ul, ol, li, figure, figcaption, blockquote, dl, dt, dd {
  margin: 0;
  padding: 0;
}

ul, ol { list-style: none; }

img, svg, video { display: block; max-width: 100%; }

img { height: auto; }

button {
  font: inherit;
  color: inherit;
  background: none;
  border: 0;
  padding: 0;
  cursor: pointer;
}

table { border-collapse: collapse; width: 100%; }

input, textarea, select { font: inherit; color: inherit; }

/* ---------- 2. Design tokens ---------- */
:root {
  --mugwort: #4E6B4A;
  --mugwort-soft: #8FA98A;
  --mugwort-deep: #3B5238;
  --walnut: #5B3A24;
  --walnut-deep: #452C1B;
  --wood: #A9835C;
  --paper: #F5EFE4;
  --paper-deep: #E7DDCB;
  --table-red: #B23A34;
  --chip-gold: #C99A3B;
  --chip-gold-soft: #E0C179;
  --ink: #221B16;
  --ink-soft: #6B6B60;

  --line: rgba(169, 131, 92, 0.45);
  --line-soft: rgba(169, 131, 92, 0.28);
  --line-strong: rgba(91, 58, 36, 0.35);

  --shadow-1: 0 1px 2px rgba(34, 27, 22, 0.08);
  --shadow-2: 0 6px 18px rgba(34, 27, 22, 0.14);
  --shadow-3: 0 14px 34px rgba(34, 27, 22, 0.18);

  --ease: cubic-bezier(0.4, 0, 0.2, 1);
  --radius: 8px;
  --radius-sm: 4px;

  --font-display: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "STSong", "SimSun", serif;
  --font-body: "PingFang SC", "Hiragino Sans GB", "Noto Sans SC", "Source Han Sans SC", "Microsoft YaHei", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", "Courier New", monospace;

  --header-h: 68px;
  --content-max: 1240px;
}

/* ---------- 3. Base typography ---------- */
body {
  background-color: var(--paper);
  background-image: linear-gradient(rgba(169, 131, 92, 0.07) 1px, transparent 1px);
  background-size: 100% 34px;
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.85;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: -0.005em;
}

h1 { font-size: clamp(30px, 4.6vw, 44px); }
h2 { font-size: clamp(23px, 3vw, 34px); }
h3 { font-size: clamp(19px, 2.2vw, 26px); }
h4 { font-size: 20px; line-height: 1.4; }

p { max-width: 68ch; }

a {
  color: var(--mugwort);
  text-decoration: none;
  transition: color 0.18s var(--ease);
}

a:hover { text-decoration: underline; text-underline-offset: 3px; }

strong { font-weight: 700; }

.mono,
.num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
}

/* ---------- 4. Focus & motion ---------- */
:focus-visible {
  outline: 2px solid var(--chip-gold);
  outline-offset: 3px;
  border-radius: 3px;
}

.command-bar :focus-visible,
.site-footer :focus-visible { outline-color: var(--chip-gold-soft); }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
  [data-reveal] { opacity: 1 !important; translate: none !important; }
}

/* ---------- 5. Layout primitives ---------- */
.container {
  width: 100%;
  max-width: var(--content-max);
  margin: 0 auto;
  padding-left: 24px;
  padding-right: 24px;
}

.layout {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: 32px;
  align-items: start;
}

.layout__main { grid-column: 1 / span 8; min-width: 0; }
.layout__aside { grid-column: 10 / span 3; min-width: 0; }

.section { padding: 64px 0; }
.section--tight { padding: 36px 0; }
.section--paper { background: var(--paper-deep); }
.section--walnut {
  background: var(--walnut);
  color: var(--paper);
  border-top: 1px solid var(--walnut-deep);
  border-bottom: 1px solid var(--walnut-deep);
}
.section--walnut h2,
.section--walnut h3 { color: var(--paper); }
.section--walnut a { color: var(--chip-gold-soft); }

.rule-gold {
  height: 1px;
  border: 0;
  margin: 0;
  background: linear-gradient(90deg, var(--chip-gold), rgba(201, 154, 59, 0));
}

.eyebrow {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
  font-family: var(--font-body);
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: 0.22em;
  color: var(--mugwort);
}

.eyebrow::before {
  content: "";
  flex: 0 0 auto;
  width: 22px;
  height: 1px;
  background: var(--chip-gold);
}

.section--walnut .eyebrow { color: var(--chip-gold-soft); }

/* ---------- 6. Page head ---------- */
.page-head {
  position: relative;
  overflow: hidden;
  background: var(--paper-deep);
  border-bottom: 1px solid var(--line);
}

.page-head::after {
  content: "";
  position: absolute;
  right: -70px;
  top: -80px;
  width: 230px;
  height: 230px;
  border-radius: 50%;
  border: 1px dashed var(--line);
  pointer-events: none;
}

.page-head__inner {
  position: relative;
  z-index: 1;
  padding-top: 52px;
  padding-bottom: 46px;
}

.page-head__title {
  max-width: 20ch;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(28px, 4.2vw, 44px);
  line-height: 1.24;
}

.page-head__lead {
  margin-top: 18px;
  max-width: 62ch;
  font-size: 16.5px;
  line-height: 1.85;
  color: var(--ink-soft);
}

/* ---------- 7. Breadcrumb ---------- */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding: 14px 0 0;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.04em;
  color: var(--ink-soft);
}

.breadcrumb a { color: var(--ink-soft); }
.breadcrumb a:hover { color: var(--mugwort); }
.breadcrumb__sep { color: var(--wood); }

/* ---------- 8. Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 12px 22px;
  border: 1px solid var(--mugwort);
  border-radius: 6px;
  background: var(--paper);
  color: var(--mugwort);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.06em;
  box-shadow: var(--shadow-1);
  transition: transform 0.2s var(--ease), box-shadow 0.2s var(--ease),
              background-color 0.2s var(--ease), color 0.2s var(--ease),
              border-color 0.2s var(--ease);
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-2);
  text-decoration: none;
}

.btn--primary {
  background: var(--mugwort);
  border-color: var(--mugwort);
  color: var(--paper);
}

.btn--primary:hover { background: var(--mugwort-deep); }

.btn--accent {
  background: var(--table-red);
  border-color: var(--table-red);
  color: #FFF7EF;
}

.btn--accent:hover { background: #9C2F2A; }

.btn--ghost {
  background: transparent;
  border-color: var(--wood);
  color: var(--ink);
}

.btn--ghost:hover { border-color: var(--mugwort); color: var(--mugwort); }

.btn--chip { border-radius: 999px; }

.btn__mark {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--chip-gold);
  box-shadow: inset 0 0 0 1px rgba(34, 27, 22, 0.25);
}

/* ---------- 9. Chip stack entries ---------- */
.chip-stack {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  gap: 14px;
}

.chip-stack__item {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 14px 26px 14px 18px;
  border: 1px solid rgba(34, 27, 22, 0.28);
  border-radius: 999px;
  background: var(--mugwort);
  color: var(--paper);
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.05em;
  box-shadow: inset 0 0 0 3px rgba(245, 239, 228, 0.26), var(--shadow-1);
  transition: transform 0.2s var(--ease), box-shadow 0.2s var(--ease),
              background-color 0.2s var(--ease);
}

.chip-stack__item:hover {
  transform: translateY(-2px);
  box-shadow: inset 0 0 0 3px rgba(245, 239, 228, 0.26), var(--shadow-2);
  text-decoration: none;
}

.chip-stack__item::before {
  content: "";
  flex: 0 0 auto;
  width: 13px;
  height: 13px;
  border-radius: 50%;
  background: var(--chip-gold);
  box-shadow: inset 0 0 0 2px rgba(34, 27, 22, 0.22);
}

.chip-stack__item--alt {
  background: var(--table-red);
  color: #FFF7EF;
}

.chip-stack__item--alt::before { background: var(--chip-gold-soft); }

/* ---------- 10. Cards ---------- */
.card {
  position: relative;
  padding: 26px 26px 24px;
  background: var(--paper);
  border: 1px solid var(--wood);
  border-radius: var(--radius);
  box-shadow: var(--shadow-1);
  transform: rotate(var(--tilt, 0deg));
  transition: transform 0.22s var(--ease), box-shadow 0.22s var(--ease);
}

.card:hover {
  transform: translateY(-2px) rotate(var(--tilt, 0deg));
  box-shadow: var(--shadow-2);
}

.card--tilt { --tilt: -0.9deg; }
.card--tilt-alt { --tilt: 0.9deg; }

.card__title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 21px;
  line-height: 1.35;
  margin-bottom: 10px;
}

.card__text {
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.card__meta {
  margin-top: 16px;
  padding-top: 14px;
  border-top: 1px dashed var(--line);
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.05em;
  color: var(--ink-soft);
}

/* ---------- 11. Tags ---------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 13px;
  border: 1px solid var(--wood);
  border-radius: 999px;
  background: var(--paper-deep);
  color: var(--ink-soft);
  font-size: 12.5px;
  letter-spacing: 0.06em;
  transition: background-color 0.2s var(--ease), color 0.2s var(--ease),
              border-color 0.2s var(--ease);
}

.tag--active {
  background: var(--mugwort);
  border-color: var(--mugwort);
  color: var(--paper);
}

/* ---------- 12. Figures ---------- */
.figure {
  position: relative;
  background: var(--paper-deep);
  border: 1px solid var(--wood);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-1);
}

.figure > img {
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.figure--wide > img { aspect-ratio: 16 / 9; }
.figure--square > img { aspect-ratio: 1 / 1; }
.figure--tall > img { aspect-ratio: 3 / 4; }

.figure__caption {
  display: block;
  padding: 10px 16px;
  background: var(--paper-deep);
  border-top: 1px solid var(--line);
  font-size: 13px;
  line-height: 1.65;
  color: var(--ink-soft);
}

.figure--placeholder {
  display: grid;
  place-items: center;
  min-height: 200px;
  padding: 24px;
  background-image: repeating-linear-gradient(
    135deg,
    rgba(169, 131, 92, 0.10) 0 10px,
    transparent 10px 20px
  );
  color: var(--ink-soft);
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.1em;
  text-align: center;
}

/* ---------- 13. Tables ---------- */
.table-scroll {
  width: 100%;
  overflow-x: auto;
  border-radius: var(--radius);
}

.data-table {
  min-width: 520px;
  font-size: 15px;
  border: 1px solid var(--wood);
  background: var(--paper);
}

.data-table thead th {
  padding: 12px 16px;
  background: var(--paper-deep);
  border-bottom: 1px solid var(--wood);
  color: var(--ink);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-align: left;
  white-space: nowrap;
}

.data-table tbody td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--line-soft);
  vertical-align: top;
  line-height: 1.7;
}

.data-table tbody tr:nth-child(even) { background: rgba(143, 169, 138, 0.10); }
.data-table tbody tr:last-child td { border-bottom: 0; }
.data-table tbody tr:hover { background: rgba(201, 154, 59, 0.10); }

.data-table .num,
.data-table th.num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  text-align: right;
  white-space: nowrap;
}

/* ---------- 14. Steps (skill-tree) ---------- */
.steps { position: relative; }

.step {
  position: relative;
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr);
  gap: 18px;
  padding-bottom: 30px;
}

.step:last-child { padding-bottom: 0; }

.step:not(:last-child)::before {
  content: "";
  position: absolute;
  left: 23px;
  top: 54px;
  bottom: 6px;
  border-left: 1px dashed var(--mugwort-soft);
}

.step__num {
  width: 48px;
  height: 48px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  border: 1px solid rgba(91, 58, 36, 0.4);
  background: radial-gradient(circle at 34% 28%, #EBD3A0, var(--chip-gold) 72%);
  box-shadow: inset 0 0 0 4px rgba(245, 239, 228, 0.55), var(--shadow-1);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 700;
}

.step__body { padding-top: 4px; min-width: 0; }

.step__title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 19px;
  line-height: 1.4;
  margin-bottom: 6px;
}

.step__body p {
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--ink-soft);
}

/* ---------- 15. Timeline ---------- */
.timeline {
  position: relative;
  padding-left: 26px;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 10px;
  bottom: 10px;
  width: 1px;
  background: repeating-linear-gradient(
    to bottom,
    var(--mugwort-soft) 0 5px,
    transparent 5px 11px
  );
}

.timeline__item {
  position: relative;
  padding-bottom: 26px;
}

.timeline__item:last-child { padding-bottom: 0; }

.timeline__item::before {
  content: "";
  position: absolute;
  left: -26px;
  top: 9px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--chip-gold);
  border: 2px solid var(--paper);
  box-shadow: 0 0 0 1px var(--chip-gold);
}

.timeline__title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 18px;
  line-height: 1.4;
  margin-bottom: 4px;
}

.timeline__meta {
  display: block;
  margin-bottom: 6px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.08em;
  color: var(--mugwort);
}

.timeline__item p {
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--ink-soft);
}

/* ---------- 16. Accordion / Q&A ---------- */
.qa { border-bottom: 1px solid var(--line); }
.qa:first-of-type { border-top: 1px solid var(--line); }

.qa__trigger {
  width: 100%;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 18px;
  padding: 18px 0;
  text-align: left;
  font-family: var(--font-body);
  font-size: 16.5px;
  font-weight: 600;
  line-height: 1.65;
  color: var(--ink);
  transition: color 0.18s var(--ease);
}

.qa__trigger:hover { color: var(--mugwort); }

.qa__icon {
  position: relative;
  flex: 0 0 auto;
  width: 16px;
  height: 16px;
  margin-top: 8px;
}

.qa__icon::before,
.qa__icon::after {
  content: "";
  position: absolute;
  background: var(--chip-gold);
  transition: transform 0.22s var(--ease), opacity 0.22s var(--ease);
}

.qa__icon::before { left: 0; top: 7px; width: 16px; height: 2px; }
.qa__icon::after { left: 7px; top: 0; width: 2px; height: 16px; }

.qa__trigger[aria-expanded="true"] .qa__icon::after {
  transform: scaleY(0);
  opacity: 0;
}

.qa__panel {
  margin: 0 0 20px 0;
  padding: 2px 0 4px 18px;
  border-left: 2px solid var(--mugwort-soft);
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--ink-soft);
}

.qa__panel p + p { margin-top: 0.9em; }

.qa__group + .qa__group { margin-top: 28px; }

/* ---------- 17. Aside note ---------- */
.aside-note {
  padding: 2px 0 2px 16px;
  border-left: 2px solid var(--mugwort-soft);
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.aside-note p { max-width: none; }

/* ---------- 18. Prose ---------- */
.prose { max-width: 68ch; }
.prose > * + * { margin-top: 1.05em; }
.prose h2 { margin-top: 1.9em; }
.prose h3 { margin-top: 1.6em; }

.prose ul { padding-left: 0; }

.prose ul > li {
  position: relative;
  padding-left: 20px;
  margin-top: 0.5em;
}

.prose ul > li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--chip-gold);
  box-shadow: inset 0 0 0 1px rgba(34, 27, 22, 0.2);
}

.prose ol {
  list-style: decimal;
  padding-left: 1.4em;
}

.prose ol > li { margin-top: 0.5em; padding-left: 0.2em; }

.prose ol > li::marker {
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--mugwort);
}

/* ---------- 19. Reveal ---------- */
[data-reveal] {
  opacity: 0;
  translate: 0 10px;
  transition: opacity 0.42s var(--ease), translate 0.42s var(--ease);
  transition-delay: var(--reveal-delay, 0ms);
}

[data-reveal].is-revealed {
  opacity: 1;
  translate: 0 0;
}

/* ---------- 20. Skip link ---------- */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 300;
  padding: 12px 22px;
  background: var(--chip-gold);
  color: var(--ink);
  font-weight: 700;
  font-size: 14px;
  border-radius: 0 0 6px 0;
}

.skip-link:focus {
  left: 0;
  text-decoration: none;
}

#main-content { scroll-margin-top: 96px; }

/* ---------- 21. Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 80;
}

.command-bar {
  position: relative;
  background: var(--mugwort);
  color: var(--paper);
  box-shadow: 0 1px 0 var(--walnut), 0 2px 12px rgba(34, 27, 22, 0.18);
}

.command-bar__inner {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 0 24px;
  min-height: var(--header-h);
  display: flex;
  align-items: center;
  gap: 26px;
}

/* brand */
.brand {
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 0;
  color: var(--paper);
}

.brand:hover { text-decoration: none; }

.brand__mark {
  flex: 0 0 auto;
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  border: 1px solid rgba(245, 239, 228, 0.5);
  background: radial-gradient(circle at 34% 28%, #F0DCAE, var(--chip-gold) 72%);
  box-shadow: inset 0 0 0 3px rgba(245, 239, 228, 0.6);
  color: var(--walnut);
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 800;
  line-height: 1;
}

.brand__text {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.brand__name {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 800;
  letter-spacing: 0.08em;
  line-height: 1.25;
}

.brand__tagline {
  font-size: 11.5px;
  letter-spacing: 0.05em;
  line-height: 1.45;
  color: rgba(245, 239, 228, 0.72);
  white-space: nowrap;
}

/* nav toggle */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 10px;
  margin-left: auto;
  padding: 9px 14px;
  border: 1px solid rgba(245, 239, 228, 0.45);
  border-radius: 6px;
  color: var(--paper);
  font-size: 13px;
  letter-spacing: 0.12em;
  transition: background-color 0.18s var(--ease), border-color 0.18s var(--ease);
}

.nav-toggle:hover { background: rgba(34, 27, 22, 0.18); }

.nav-toggle__bars {
  display: grid;
  gap: 4px;
  width: 18px;
}

.nav-toggle__bars > span {
  display: block;
  height: 1.5px;
  border-radius: 2px;
  background: currentColor;
  transition: transform 0.22s var(--ease), opacity 0.22s var(--ease);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bars > span:nth-child(1) {
  transform: translateY(5.5px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bars > span:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bars > span:nth-child(3) {
  transform: translateY(-5.5px) rotate(-45deg);
}

/* navigation */
.site-nav { margin-left: auto; }

.site-nav__list {
  display: flex;
  align-items: center;
  gap: 2px;
}

.site-nav__link {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 22px 13px;
  color: rgba(245, 239, 228, 0.85);
  font-size: 14.5px;
  letter-spacing: 0.1em;
  white-space: nowrap;
  transition: color 0.18s var(--ease), background-color 0.18s var(--ease);
}

.site-nav__link:hover {
  color: #FFFFFF;
  background: rgba(34, 27, 22, 0.16);
  text-decoration: none;
}

.site-nav__idx {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.06em;
  color: var(--chip-gold);
  opacity: 0.9;
}

.site-nav__link[aria-current="page"] {
  color: #FFFFFF;
  box-shadow: inset 0 -2px 0 0 var(--chip-gold);
}

.site-nav__link[aria-current="page"]::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 8px;
  margin-left: -5px;
  width: 0;
  height: 0;
  border-left: 5px solid transparent;
  border-right: 5px solid transparent;
  border-top: 6px solid var(--chip-gold);
  animation: chipMark 0.24s var(--ease) both;
}

@keyframes chipMark {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: translateY(0); }
}

.site-nav__item--cta { display: none; }

.site-nav__link--cta {
  color: var(--ink);
  background: var(--chip-gold);
  font-weight: 700;
  border-radius: 999px;
  margin: 10px 20px;
  padding: 12px 20px;
  justify-content: center;
}

.site-nav__link--cta:hover { background: #D8AC55; color: var(--ink); }

/* header CTA */
.header-cta {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  border: 1px solid rgba(34, 27, 22, 0.28);
  border-radius: 999px;
  background: var(--chip-gold);
  color: var(--ink);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.06em;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.35), 0 1px 3px rgba(34, 27, 22, 0.28);
  transition: transform 0.2s var(--ease), box-shadow 0.2s var(--ease),
              background-color 0.2s var(--ease);
}

.header-cta:hover {
  transform: translateY(-2px);
  background: #D8AC55;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.35), 0 5px 12px rgba(34, 27, 22, 0.3);
  text-decoration: none;
}

/* scroll progress */
.scroll-progress {
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--chip-gold-soft), var(--chip-gold));
  transform: scaleX(0);
  transform-origin: 0 50%;
  pointer-events: none;
  transition: transform 0.1s linear;
}

/* ---------- 22. Footer ---------- */
.site-footer {
  position: relative;
  margin-top: 72px;
  background: var(--walnut);
  color: rgba(245, 239, 228, 0.82);
  border-top: 3px solid var(--chip-gold);
  overflow: hidden;
}

.site-footer::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(
    90deg,
    rgba(245, 239, 228, 0.035) 0 1px,
    transparent 1px 58px
  );
  pointer-events: none;
}

.site-footer__inner {
  position: relative;
  z-index: 1;
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 56px 24px 26px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.7fr 1fr 1fr 1.3fr;
  gap: 40px 32px;
}

.footer-brand__name {
  font-family: var(--font-display);
  font-size: 24px;
  font-weight: 800;
  letter-spacing: 0.06em;
  line-height: 1.3;
  color: var(--paper);
}

.footer-brand__desc {
  margin-top: 14px;
  max-width: 34ch;
  font-size: 14.5px;
  line-height: 1.85;
  color: rgba(245, 239, 228, 0.72);
}

.footer-brand__since {
  margin-top: 14px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.06em;
  color: var(--chip-gold-soft);
}

.footer-col__title {
  margin-bottom: 14px;
  font-family: var(--font-body);
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: 0.2em;
  color: var(--chip-gold);
}

.footer-col__list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-col__link {
  display: inline-block;
  padding: 2px 0;
  color: rgba(245, 239, 228, 0.8);
  font-size: 14.5px;
  transition: color 0.18s var(--ease), transform 0.18s var(--ease);
}

.footer-col__link:hover {
  color: var(--paper);
  text-decoration: none;
  transform: translateX(3px);
}

.footer-col__list--plain { gap: 12px; }

.footer-contact__item {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.footer-contact__label {
  font-size: 11.5px;
  letter-spacing: 0.16em;
  color: rgba(245, 239, 228, 0.55);
}

.footer-contact__value {
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: 0.02em;
  color: var(--paper);
  word-break: break-all;
}

.footer-legal {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 8px 28px;
  margin-top: 46px;
  padding-top: 20px;
  border-top: 1px solid rgba(245, 239, 228, 0.18);
  font-size: 13px;
  color: rgba(245, 239, 228, 0.62);
}

.footer-legal__text {
  max-width: none;
  font-family: var(--font-mono);
  letter-spacing: 0.02em;
}

/* ---------- 23. Responsive ---------- */
@media (max-width: 1080px) {
  .layout { gap: 28px; }
  .layout__main { grid-column: 1 / span 8; }
  .layout__aside { grid-column: 10 / span 3; }
  .footer-grid { grid-template-columns: 1.5fr 1fr 1fr; }
}

@media (max-width: 1000px) {
  body { font-size: 16.5px; }

  .layout { grid-template-columns: 1fr; gap: 32px; }
  .layout__main,
  .layout__aside { grid-column: 1 / -1; }

  .section { padding: 48px 0; }
}

@media (max-width: 1040px) {
  .nav-toggle { display: inline-flex; }

  .site-nav {
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    margin-left: 0;
    display: none;
    max-height: min(72vh, 540px);
    overflow-y: auto;
    background: var(--walnut);
    border-bottom: 2px solid var(--chip-gold);
    box-shadow: var(--shadow-3);
  }

  .site-nav[data-open] { display: block; }

  .site-nav__list {
    display: block;
    padding: 8px 0 16px;
  }

  .site-nav__link {
    width: 100%;
    padding: 15px 24px;
    border-bottom: 1px solid rgba(245, 239, 228, 0.12);
    font-size: 15px;
  }

  .site-nav__link:hover { background: rgba(34, 27, 22, 0.24); }

  .site-nav__link[aria-current="page"] {
    box-shadow: inset 3px 0 0 0 var(--chip-gold);
    background: rgba(201, 154, 59, 0.14);
  }

  .site-nav__link[aria-current="page"]::after { display: none; }

  .site-nav__item--cta { display: block; }

  .header-cta { display: none; }

  .brand__tagline { display: none; }
}

@media (max-width: 760px) {
  .container { padding-left: 18px; padding-right: 18px; }
  .command-bar__inner { padding: 0 18px; gap: 14px; }
  .site-footer__inner { padding: 44px 18px 22px; }

  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px 24px; }

  .page-head__inner { padding-top: 38px; padding-bottom: 34px; }
}

@media (max-width: 520px) {
  body { font-size: 16px; line-height: 1.8; }

  .footer-grid { grid-template-columns: 1fr; }

  .footer-legal { flex-direction: column; gap: 6px; }

  .step { grid-template-columns: 40px minmax(0, 1fr); gap: 14px; }
  .step__num { width: 40px; height: 40px; font-size: 13.5px; }
  .step:not(:last-child)::before { left: 19px; top: 46px; }

  .brand__mark { width: 34px; height: 34px; font-size: 17px; }
  .brand__name { font-size: 16.5px; }
}