/* ==========================================================================
   财神棋牌局 · 共享站点样式  /assets/site.css
   母题：鎏金账册 + 技术蓝图网格 + 侧边轨道导航
   ========================================================================== */

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 24px;
}

body, h1, h2, h3, h4, h5, h6, p, figure, blockquote, dl, dd, pre { margin: 0; }
ul, ol { list-style: none; margin: 0; padding: 0; }
a { color: inherit; text-decoration: none; }
button, input, select, textarea { font: inherit; color: inherit; }
button { background: none; border: 0; padding: 0; cursor: pointer; }
img, svg, picture, video { display: block; max-width: 100%; }
table { border-collapse: collapse; width: 100%; }
hr { border: 0; border-top: 1px solid var(--line-soft); margin: 0; }
::selection { background: var(--red); color: var(--white); }

/* ---------- 2. Tokens ---------- */
:root {
  --paper: #F6EEDC;
  --white: #FBF7EE;
  --ink: #1C1916;
  --brown: #2E211B;
  --red: #B3261E;
  --gold: #C9972B;
  --orange: #E05A2B;
  --green: #1F7A6B;
  --muted: #7A6A5A;
  --sand: #EAD7A6;

  --line: rgba(201, 151, 43, .5);
  --line-soft: rgba(122, 106, 90, .24);
  --veil: rgba(234, 215, 166, .45);

  --font-display: "Source Han Serif SC", "Songti SC", STSong, serif;
  --font-sans: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono: "IBM Plex Mono", "Roboto Mono", SFMono-Regular, monospace;

  --rail-w: 248px;
  --maxw: 1280px;
  --gap: 24px;
  --cut: 14px;
  --shadow: 0 1px 0 rgba(46, 33, 27, .05), 0 16px 36px -28px rgba(46, 33, 27, .65);
}

/* ---------- 3. Base typography & page ground ---------- */
body {
  background-color: var(--paper);
  background-image: repeating-linear-gradient(
    90deg,
    rgba(46, 33, 27, .045) 0 1px,
    transparent 1px 120px
  );
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 1.0625rem;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: .02em;
  color: var(--brown);
}

h1 { font-size: clamp(2.2rem, 4.4vw, 4rem); }
h2 { font-size: clamp(1.6rem, 2.6vw, 2.4rem); }
h3 { font-size: clamp(1.35rem, 1.8vw, 1.6rem); }
h4 { font-size: 1.1rem; letter-spacing: .04em; }
p  { max-width: 68ch; }

strong { font-weight: 600; color: var(--brown); }
code, kbd, samp, time { font-family: var(--font-mono); letter-spacing: .04em; }

.h-display {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(3.4rem, 8vw, 7.2rem);
  line-height: 1.02;
  letter-spacing: .02em;
  color: var(--brown);
}

.eyebrow {
  display: flex;
  align-items: center;
  gap: .7em;
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--muted);
}
.eyebrow::before {
  content: "";
  width: 28px;
  height: 1px;
  background: var(--gold);
  flex: none;
}

.sr-only {
  position: absolute !important;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

:focus-visible {
  outline: 2px solid var(--green);
  outline-offset: 3px;
}

/* ---------- 4. Skip link ---------- */
.skip-link {
  position: fixed;
  left: 12px;
  top: -80px;
  z-index: 300;
  padding: .65rem 1.1rem;
  background: var(--brown);
  color: var(--sand);
  font-size: .85rem;
  letter-spacing: .06em;
  border-left: 3px solid var(--red);
  transition: top .18s ease;
}
.skip-link:focus { top: 10px; }

/* ---------- 5. Layout helpers ---------- */
.container {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: clamp(16px, 4vw, 48px);
}

.section { padding-block: clamp(32px, 5vw, 72px); }

.stack { display: grid; gap: var(--gap); }

.grid { display: grid; gap: var(--gap); }
.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }

.rule {
  height: 1px;
  border: 0;
  background: linear-gradient(90deg, var(--gold), rgba(201, 151, 43, 0));
}

/* ---------- 6. Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .5em;
  padding: .72em 1.2em;
  font-size: .95rem;
  font-weight: 500;
  letter-spacing: .05em;
  line-height: 1.2;
  border: 1px solid var(--brown);
  background: var(--white);
  color: var(--brown);
  transition: background-color .18s ease, color .18s ease,
              border-color .18s ease, transform .18s ease;
}
.btn:hover { transform: translateY(-1px); }

.btn--primary {
  background: var(--red);
  border-color: var(--red);
  color: var(--white);
}
.btn--primary:hover { background: var(--orange); border-color: var(--orange); }

.btn--ghost {
  background: transparent;
  border-color: var(--gold);
  color: var(--brown);
}
.btn--ghost:hover { background: var(--veil); border-color: var(--brown); }

.btn--line {
  background: transparent;
  border-color: var(--line-soft);
  color: var(--brown);
}
.btn--line:hover { border-color: var(--red); color: var(--red); }

/* ---------- 7. Panels, plaques, badges ---------- */
.panel {
  position: relative;
  background: var(--white);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  padding: clamp(18px, 2.2vw, 28px);
}

.panel--cut {
  border: 0;
  box-shadow: none;
  clip-path: polygon(
    var(--cut) 0, 100% 0,
    100% calc(100% - var(--cut)),
    calc(100% - var(--cut)) 100%,
    0 100%, 0 var(--cut)
  );
}
.panel--cut::before {
  content: "";
  position: absolute;
  inset: 0;
  border: 1px solid var(--gold);
  clip-path: polygon(
    var(--cut) 0, 100% 0,
    100% calc(100% - var(--cut)),
    calc(100% - var(--cut)) 100%,
    0 100%, 0 var(--cut)
  );
  pointer-events: none;
}

.plaque {
  display: inline-flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .3rem .9rem;
  padding: .45rem .75rem;
  background: var(--sand);
  border-left: 3px solid var(--red);
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .12em;
  color: var(--brown);
}

.tag {
  display: inline-block;
  padding: .16em .55em;
  font-size: .72rem;
  letter-spacing: .08em;
  background: var(--veil);
  border: 1px solid var(--line);
  color: var(--brown);
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: .4em;
  padding: .18em .62em;
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .1em;
  border: 1px solid currentColor;
  color: var(--green);
}
.badge--live::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: currentColor;
  animation: badge-pulse 2.4s ease-in-out infinite;
}
.badge--gold { color: var(--gold); }
.badge--red { color: var(--red); }

@keyframes badge-pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: .35; transform: scale(.8); }
}

.meta-row {
  display: flex;
  flex-wrap: wrap;
  gap: .4rem 1.2rem;
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .1em;
  color: var(--muted);
}

/* ---------- 8. Breadcrumbs ---------- */
.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .4rem;
  padding-block: 16px;
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .08em;
  color: var(--muted);
}
.breadcrumbs li { display: inline-flex; align-items: center; gap: .4rem; }
.breadcrumbs li + li::before {
  content: "/";
  color: var(--gold);
}
.breadcrumbs a { transition: color .16s ease; }
.breadcrumbs a:hover { color: var(--red); }
.breadcrumbs [aria-current="page"] { color: var(--brown); }

/* ---------- 9. Image containers (page-stage placeholders) ---------- */
.img-frame {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  border: 1px solid var(--line);
  background: linear-gradient(135deg, rgba(234, 215, 166, .9), rgba(251, 247, 238, .55));
}
.img-frame img,
.img-frame picture > img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  position: relative;
  z-index: 1;
}
.img-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    repeating-linear-gradient(90deg, rgba(201, 151, 43, .3) 0 1px, transparent 1px 24px),
    repeating-linear-gradient(0deg, rgba(201, 151, 43, .3) 0 1px, transparent 1px 24px);
  opacity: .35;
  pointer-events: none;
  z-index: 2;
}
.img-frame--square { aspect-ratio: 1 / 1; }
.img-frame--tall { aspect-ratio: 3 / 4; }
.img-frame--cut {
  clip-path: polygon(
    16px 0, 100% 0,
    100% calc(100% - 16px),
    calc(100% - 16px) 100%,
    0 100%, 0 16px
  );
}
.img-frame__placeholder {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .2em;
  color: rgba(122, 106, 90, .8);
  z-index: 1;
}
.img-frame__caption {
  margin-top: .5rem;
  font-family: var(--font-mono);
  font-size: .68rem;
  letter-spacing: .1em;
  color: var(--muted);
}

/* ---------- 10. Read progress ---------- */
.read-progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: rgba(201, 151, 43, .22);
  z-index: 120;
  pointer-events: none;
}
.read-progress__bar {
  display: block;
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, var(--red), var(--orange));
  transition: width .12s linear;
}

/* ---------- 11. Site header / left rail ---------- */
.site-header {
  position: fixed;
  inset: 0 auto 0 0;
  width: var(--rail-w);
  z-index: 100;
  display: flex;
  color: var(--brown);
  background: linear-gradient(180deg, #FCF8F0 0%, #F6EEDC 62%, #F1E5CC 100%);
  border-right: 1px solid var(--line);
}
.site-header::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(
    90deg,
    rgba(201, 151, 43, .16) 0 1px,
    transparent 1px 24px
  );
  opacity: .55;
  pointer-events: none;
}
.site-header::after {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  right: -1px;
  width: 1px;
  background: linear-gradient(180deg, var(--red) 0 72px, var(--gold) 72px 100%);
  opacity: .7;
}

.site-header__inner {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  gap: 16px;
  width: 100%;
  min-height: 0;
  padding: 20px 18px 18px;
}

/* Brand */
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
}
.brand__seal {
  flex: none;
  width: 40px;
  height: 40px;
  display: grid;
  place-items: center;
  background: var(--red);
  color: var(--sand);
  border: 1px solid var(--gold);
  box-shadow: inset 0 0 0 3px rgba(246, 238, 220, .22);
  font-family: var(--font-display);
  font-size: 1.15rem;
  line-height: 1;
  letter-spacing: 0;
}
.brand__text {
  display: grid;
  gap: 2px;
  min-width: 0;
}
.brand__name {
  font-family: var(--font-display);
  font-size: 1.12rem;
  font-weight: 600;
  letter-spacing: .08em;
  line-height: 1.2;
  color: var(--brown);
}
.brand__tagline {
  font-family: var(--font-mono);
  font-size: .62rem;
  letter-spacing: .16em;
  color: var(--muted);
  line-height: 1.4;
}

/* Version status block */
.rail-status {
  display: grid;
  gap: 8px;
  padding-block: 12px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.rail-status__label {
  font-family: var(--font-mono);
  font-size: .64rem;
  letter-spacing: .2em;
  color: var(--muted);
  line-height: 1.4;
}
.rail-status__date {
  font-family: var(--font-mono);
  font-size: 1.55rem;
  line-height: 1.1;
  letter-spacing: .02em;
  color: var(--red);
}
.rail-status__note {
  font-size: .72rem;
  line-height: 1.5;
  letter-spacing: .04em;
  color: var(--muted);
}

.version-switch {
  display: flex;
  gap: 3px;
  padding: 3px;
  border: 1px solid var(--gold);
  background: rgba(234, 215, 166, .4);
}
.version-switch__btn {
  flex: 1 1 0;
  min-width: 0;
  padding: .38rem .2rem;
  font-family: var(--font-mono);
  font-size: .68rem;
  letter-spacing: .02em;
  line-height: 1.3;
  color: var(--brown);
  border: 1px solid transparent;
  transition: background-color .18s ease, color .18s ease, border-color .18s ease;
}
.version-switch__btn:hover { background: var(--veil); border-color: var(--gold); }
.version-switch__btn[aria-pressed="true"] {
  background: var(--red);
  border-color: var(--red);
  color: var(--white);
}

/* Header tools */
.header-tools {
  display: grid;
  gap: 8px;
  padding-top: 12px;
  border-top: 1px solid var(--line);
}
.nav-filter { display: block; }
.nav-filter__input {
  width: 100%;
  padding: .45rem .6rem;
  background: var(--white);
  border: 1px solid var(--line-soft);
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .06em;
  color: var(--brown);
  transition: border-color .16s ease, box-shadow .16s ease;
}
.nav-filter__input::placeholder { color: var(--muted); }
.nav-filter__input:focus {
  border-color: var(--gold);
  box-shadow: inset 0 0 0 1px rgba(201, 151, 43, .35);
  outline: none;
}
.nav-filter__input:focus-visible {
  outline: 2px solid var(--green);
  outline-offset: 1px;
}

.tool-link {
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  gap: .5rem;
  padding-bottom: .3rem;
  font-size: .86rem;
  letter-spacing: .04em;
  color: var(--red);
  border-bottom: 1px dashed rgba(179, 38, 30, .42);
  transition: color .16s ease, border-color .16s ease;
}
.tool-link:hover { color: var(--orange); border-bottom-color: var(--orange); }

/* Navigation */
.nav {
  flex: 1 1 auto;
  min-height: 0;
  overflow-y: auto;
}
.nav__caption {
  font-family: var(--font-mono);
  font-size: .64rem;
  letter-spacing: .22em;
  color: var(--muted);
  padding-bottom: 8px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 6px;
}
.nav__list { display: flex; flex-direction: column; }
.nav__item[hidden] { display: none; }
.nav__link {
  position: relative;
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 9px 8px 9px 10px;
  border-left: 2px solid transparent;
  transition: background-color .18s ease, border-color .18s ease, transform .18s ease;
}
.nav__index {
  font-family: var(--font-mono);
  font-size: .66rem;
  letter-spacing: .08em;
  color: var(--gold);
  flex: none;
}
.nav__label {
  font-size: .94rem;
  letter-spacing: .05em;
  color: var(--brown);
}
.nav__link:hover {
  background: var(--veil);
  border-left-color: var(--orange);
  transform: translateX(2px);
}
.nav__link[aria-current="page"] {
  background: var(--brown);
  border-left-color: var(--red);
}
.nav__link[aria-current="page"] .nav__label { color: var(--sand); }
.nav__link[aria-current="page"] .nav__index { color: var(--gold); }
.nav__link[aria-current="page"]:hover { transform: none; }

.nav__empty {
  padding: 10px 8px;
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .1em;
  color: var(--muted);
}
.nav__empty[hidden] { display: none; }

/* Mobile toggle */
.nav-toggle {
  display: none;
  align-items: center;
  gap: .55rem;
  flex: none;
  padding: .45rem .7rem;
  border: 1px solid var(--gold);
  background: var(--white);
  color: var(--brown);
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .14em;
}
.nav-toggle__bars { display: grid; gap: 3px; width: 16px; }
.nav-toggle__bars i {
  display: block;
  height: 2px;
  background: var(--red);
  transition: transform .18s ease, opacity .18s ease;
}
.site-header[data-open] .nav-toggle { background: var(--brown); color: var(--sand); border-color: var(--brown); }
.site-header[data-open] .nav-toggle__bars i { background: var(--sand); }
.site-header[data-open] .nav-toggle__bars i:nth-child(1) { transform: translateY(5px) rotate(45deg); }
.site-header[data-open] .nav-toggle__bars i:nth-child(2) { opacity: 0; }
.site-header[data-open] .nav-toggle__bars i:nth-child(3) { transform: translateY(-5px) rotate(-45deg); }

/* ---------- 12. Site footer ---------- */
.site-footer {
  position: relative;
  margin-top: clamp(40px, 6vw, 88px);
  background: linear-gradient(180deg, #35251D 0%, #2E211B 58%, #241A15 100%);
  color: #E9DFCB;
  border-top: 3px solid var(--red);
}
.site-footer::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(
    90deg,
    rgba(201, 151, 43, .14) 0 1px,
    transparent 1px 48px
  );
  pointer-events: none;
}

.site-footer__inner {
  position: relative;
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.25fr;
  gap: 32px 28px;
  padding-block: clamp(32px, 4vw, 52px) 28px;
}

.site-footer__col { min-width: 0; }

.site-footer__title {
  font-family: var(--font-mono);
  font-size: .68rem;
  font-weight: 500;
  letter-spacing: .22em;
  color: var(--gold);
  padding-bottom: 10px;
  margin-bottom: 14px;
  border-bottom: 1px solid rgba(201, 151, 43, .34);
}

.site-footer__list { display: grid; gap: 8px; }

.site-footer__link {
  display: inline-block;
  font-size: .92rem;
  letter-spacing: .04em;
  color: #E9DFCB;
  opacity: .85;
  transition: color .16s ease, opacity .16s ease, transform .16s ease;
}
.site-footer__link:hover,
.site-footer__link:focus-visible {
  color: var(--sand);
  opacity: 1;
  transform: translateX(3px);
}

.site-footer__brand-line {
  margin-top: 14px;
  font-size: .9rem;
  line-height: 1.7;
  color: rgba(233, 223, 203, .78);
  max-width: 34ch;
}

.site-footer__note {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .5rem .9rem;
  margin-top: 14px;
}
.site-footer__note .badge { color: #58C0AC; border-color: #58C0AC; }
.site-footer__stamp {
  font-family: var(--font-mono);
  font-size: .68rem;
  letter-spacing: .12em;
  color: rgba(233, 223, 203, .6);
}

.brand--footer .brand__name { color: var(--sand); }
.brand--footer .brand__tagline { color: rgba(233, 223, 203, .55); }
.brand--footer .brand__seal { background: var(--red); color: var(--sand); }

.site-footer__contact { display: grid; gap: 10px; }
.site-footer__contact-row {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 10px;
  align-items: start;
}
.site-footer__contact-row dt {
  font-family: var(--font-mono);
  font-size: .66rem;
  letter-spacing: .14em;
  color: var(--gold);
  padding-top: .22em;
}
.site-footer__contact-row dd {
  font-size: .88rem;
  line-height: 1.65;
  color: rgba(233, 223, 203, .88);
  overflow-wrap: anywhere;
}

.site-footer__legal {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 8px 24px;
  padding-block: 16px 20px;
  border-top: 1px solid rgba(201, 151, 43, .26);
  font-family: var(--font-mono);
  font-size: .68rem;
  letter-spacing: .1em;
  color: rgba(233, 223, 203, .58);
}

/* ---------- 13. Reveal utility ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity .45s ease, transform .45s ease;
}
[data-reveal].is-revealed {
  opacity: 1;
  transform: none;
}

/* ---------- 14. Desktop / tablet body offset ---------- */
@media (min-width: 901px) {
  body { padding-left: var(--rail-w); }
}

/* ---------- 15. Tablet ---------- */
@media (max-width: 1100px) {
  .site-footer__inner { grid-template-columns: 1.4fr 1fr 1fr; }
  .site-footer__col:last-child { grid-column: 1 / -1; }
  .site-footer__contact { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 960px) {
  .grid--3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

/* ---------- 16. Mobile: header collapses to sticky bar + drawer ---------- */
@media (max-width: 900px) {
  body { padding-left: 0; }

  .site-header {
    position: sticky;
    inset: 0 0 auto 0;
    width: 100%;
    border-right: 0;
    border-bottom: 1px solid var(--line);
    box-shadow: 0 12px 24px -22px rgba(46, 33, 27, .9);
  }
  .site-header::after {
    left: 0;
    right: 0;
    top: auto;
    bottom: -1px;
    width: auto;
    height: 1px;
    background: linear-gradient(90deg, var(--red) 0 96px, var(--gold) 96px 100%);
  }

  .site-header__inner {
    flex-direction: row;
    flex-wrap: wrap;
    align-items: center;
    gap: 10px 14px;
    padding: 10px 16px 12px;
    min-height: 0;
  }

  .brand { flex: 1 1 auto; }
  .brand__seal { width: 34px; height: 34px; font-size: 1rem; }
  .brand__name { font-size: 1rem; }
  .brand__tagline { display: none; }

  .nav-toggle { display: inline-flex; }

  .rail-status {
    order: 5;
    flex: 1 1 100%;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px 12px;
    padding-block: 8px 0;
    border-top: 1px dashed var(--line);
    border-bottom: 0;
  }
  .rail-status__label { flex: 1 1 100%; font-size: .6rem; }
  .rail-status__date { font-size: 1.1rem; }
  .rail-status__note { display: none; }
  .version-switch { flex: 1 1 220px; max-width: 320px; }

  .header-tools {
    order: 6;
    flex: 1 1 100%;
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 10px;
    padding-top: 10px;
    border-top: 1px dashed var(--line);
  }

  .nav {
    order: 7;
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    flex: 0 0 auto;
    display: none;
    max-height: calc(100vh - 120px);
    overflow-y: auto;
    padding: 12px 16px 18px;
    background: var(--white);
    border-top: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
    box-shadow: 0 26px 44px -34px rgba(46, 33, 27, .9);
    z-index: 5;
  }
  .site-header[data-open] .nav { display: block; }
  .site-header[data-open] { box-shadow: 0 20px 40px -30px rgba(46, 33, 27, .95); }

  .nav__link { padding: 12px 10px; }
  .nav__label { font-size: 1rem; }

  .grid--2, .grid--3 { grid-template-columns: minmax(0, 1fr); }

  .site-footer__inner { grid-template-columns: minmax(0, 1fr); gap: 26px; }
  .site-footer__col:last-child { grid-column: auto; }
  .site-footer__contact { grid-template-columns: minmax(0, 1fr); }
  .site-footer__legal { justify-content: flex-start; }
}

@media (max-width: 420px) {
  .brand__name { letter-spacing: .04em; }
  .nav-toggle__text { display: none; }
}

/* ---------- 17. Accessibility: reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *,
  *::before,
  *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
    scroll-behavior: auto !important;
  }
  [data-reveal] {
    opacity: 1 !important;
    transform: none !important;
  }
  .read-progress__bar { transition: none; }
}

/* ---------- 18. Print ---------- */
@media print {
  .site-header, .site-footer, .read-progress, .skip-link { display: none !important; }
  body { padding-left: 0 !important; background: #fff; color: #000; }
  a { text-decoration: underline; }
}