/* =========================================================
   米博官网口 · 共享样式 /assets/site.css
   门径复古出版色系 · 蓝图网格 · 纸张叠层
   ========================================================= */

/* ---------- 1. Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body, h1, h2, h3, h4, h5, h6, p, ul, ol, li, figure, figcaption, blockquote, dl, dd { margin: 0; padding: 0; }
ul, ol { list-style: none; }
img, svg, video { display: block; max-width: 100%; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
a { color: inherit; text-decoration: none; }
table { border-collapse: collapse; width: 100%; }
:focus-visible { outline: 2px solid var(--cinnabar); outline-offset: 2px; }

/* ---------- 2. Tokens ---------- */
:root {
  --paper: #F6F1E7;
  --paper-edge: #E8E1D3;
  --ink: #241F1A;
  --ink-soft: #4A3F35;
  --cinnabar: #B4452E;
  --celadon: #4A7A69;
  --amber: #D9A441;
  --rule: #CFC6B3;
  --indigo: #1D2A33;
  --door-gradient: linear-gradient(135deg, #F0C264 0%, #C88A28 100%);

  --font-serif: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "STSong", "SimSun", Georgia, serif;
  --font-sans: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  --font-mono: ui-monospace, "SFMono-Regular", Menlo, Consolas, "Courier New", monospace;

  --measure: 72rem;
  --gutter: clamp(1.15rem, 4vw, 3.25rem);
  --header-h: 72px;
  --dur: 240ms;
  --fast: 160ms;
  --ease: cubic-bezier(.2, .6, .3, 1);
}

/* ---------- 3. Base ---------- */
html { scroll-padding-top: calc(var(--header-h) + 1.5rem); }
body {
  background-color: var(--paper);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: clamp(1rem, .95rem + .18vw, 1.125rem);
  line-height: 1.85;
  letter-spacing: .01em;
  padding-top: var(--header-h);
  min-height: 100vh;
  text-rendering: optimizeLegibility;
}
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  opacity: .04;
  background-image:
    repeating-linear-gradient(0deg, var(--ink) 0 1px, transparent 1px 3px),
    repeating-linear-gradient(90deg, var(--ink) 0 1px, transparent 1px 4px);
}
main, #main-content { display: block; position: relative; z-index: 1; }
::selection { background: var(--amber); color: var(--ink); }

/* ---------- 4. Utilities ---------- */
.wrap { width: 100%; max-width: var(--measure); margin-inline: auto; padding-inline: var(--gutter); }
.wrap--narrow { max-width: 50rem; }
.stack > * + * { margin-top: var(--stack-gap, 1.25rem); }
.num { font-family: var(--font-mono); font-variant-numeric: tabular-nums; letter-spacing: .06em; }

.paper { background: var(--paper); }
.paper-edge { background: var(--paper-edge); }
.paper-card {
  position: relative;
  background: var(--paper);
  border: 1px solid var(--rule);
  padding: clamp(1.25rem, 3vw, 2rem);
}
.paper-card::after {
  content: "";
  position: absolute;
  inset: 5px;
  border: 1px solid var(--rule);
  opacity: .45;
  pointer-events: none;
}
.paper-stack { box-shadow: 6px 6px 0 var(--paper-edge), 0 1px 0 var(--rule); }

.blueprint-grid {
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: .5;
  background-image:
    linear-gradient(to right, var(--rule) 1px, transparent 1px),
    linear-gradient(to bottom, var(--rule) 1px, transparent 1px);
  background-size: 25% 4.5rem;
}
.door-light {
  position: absolute;
  top: -12%;
  right: -8%;
  width: min(46vw, 520px);
  height: 130%;
  pointer-events: none;
  transform: skewX(-12deg);
  background: linear-gradient(115deg, rgba(240, 194, 100, .40), rgba(200, 138, 40, 0) 64%);
  animation: doorLightIn 600ms var(--ease) both;
}
@keyframes doorLightIn {
  from { opacity: 0; transform: translateX(0) skewX(-12deg); }
  to { opacity: 1; transform: translateX(8px) skewX(-12deg); }
}

/* ---------- 5. Layout ---------- */
.grid { display: grid; gap: var(--gap, 2rem); }
@media (min-width: 760px) { .grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (min-width: 960px) {
  .grid--door { grid-template-columns: minmax(10rem, 1fr) minmax(0, 3fr); gap: clamp(2rem, 4vw, 4rem); }
}
.rail { padding-left: 1.1rem; border-left: 1px solid var(--rule); }
.rail-title { font-family: var(--font-mono); font-size: .68rem; letter-spacing: .2em; color: var(--ink-soft); }
.rail-list { display: grid; gap: .1rem; margin-top: .85rem; }
.rail-link {
  display: flex;
  gap: .6rem;
  padding: .38rem .55rem;
  border-left: 2px solid transparent;
  border-radius: 0;
  color: var(--ink-soft);
  font-size: .92rem;
  line-height: 1.6;
  transition: color var(--fast) var(--ease), border-color var(--fast) var(--ease);
}
.rail-link:hover { color: var(--ink); }
.rail-link[aria-current="true"] { color: var(--cinnabar); border-left-color: var(--cinnabar); }

/* ---------- 6. Type & content blocks ---------- */
.display {
  font-family: var(--font-serif);
  font-weight: 200;
  font-size: clamp(2.4rem, 1.5rem + 4.6vw, 4.5rem);
  line-height: 1.1;
  letter-spacing: .02em;
}
.section-head { display: grid; gap: .55rem; margin-bottom: clamp(1.5rem, 4vw, 2.5rem); }
.section-num { font-family: var(--font-mono); font-size: .72rem; letter-spacing: .22em; color: var(--cinnabar); }
.section-title {
  font-family: var(--font-serif);
  font-weight: 300;
  font-size: clamp(1.7rem, 1.25rem + 2vw, 2.75rem);
  line-height: 1.28;
}
.section-lede { max-width: 44rem; color: var(--ink-soft); }

.prose { max-width: 46rem; }
.prose > * + * { margin-top: 1.15em; }
.prose h2 {
  font-family: var(--font-serif);
  font-weight: 300;
  font-size: clamp(1.35rem, 1.15rem + 1vw, 1.85rem);
  line-height: 1.45;
  margin-top: 2.2em;
}
.prose h3 { font-size: 1.1rem; font-weight: 600; margin-top: 1.8em; letter-spacing: .02em; }
.prose ul { display: grid; gap: .5rem; padding-left: 1.1rem; }
.prose ul li::before { content: "—"; color: var(--cinnabar); margin-left: -1.1rem; margin-right: .55rem; }
.prose a { color: var(--cinnabar); border-bottom: 1px solid currentColor; }
.prose a:hover { color: var(--ink); border-bottom-color: var(--ink); }
.prose blockquote {
  border-left: 2px solid var(--cinnabar);
  padding-left: 1.1rem;
  color: var(--ink-soft);
  font-family: var(--font-serif);
}

.label {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  padding: .22rem .55rem;
  border: 1px solid var(--rule);
  background: var(--paper);
  color: var(--ink-soft);
  font-family: var(--font-mono);
  font-size: .68rem;
  letter-spacing: .12em;
  line-height: 1.7;
}
.label--cinnabar { border-color: var(--cinnabar); color: var(--cinnabar); }
.label--celadon { border-color: var(--celadon); color: var(--celadon); }
.label--amber { border-color: var(--amber); color: #8A6415; }
.label--dot::before { content: ""; width: 6px; height: 6px; background: currentColor; border-radius: 50%; }

.breadcrumb { padding-top: 1.2rem; }
.breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .5rem;
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .1em;
  color: var(--ink-soft);
}
.breadcrumb-list li + li::before { content: "/"; margin-right: .5rem; color: var(--rule); }
.breadcrumb-link:hover { color: var(--cinnabar); }
.breadcrumb-current { color: var(--ink); }

.timeline { position: relative; display: grid; gap: 2rem; padding-left: 1.5rem; border-left: 1px solid var(--rule); }
.timeline-item { position: relative; }
.timeline-item::before {
  content: "";
  position: absolute;
  left: -1.5rem;
  top: .75rem;
  width: 9px;
  height: 9px;
  transform: translateX(-50%);
  border: 1px solid var(--cinnabar);
  background: var(--paper);
}
.timeline-year { font-family: var(--font-mono); font-size: .78rem; letter-spacing: .14em; color: var(--cinnabar); }
.timeline-body { color: var(--ink-soft); }

.figure { margin: 0; }
.figure-frame {
  position: relative;
  overflow: hidden;
  aspect-ratio: 4 / 3;
  background: var(--paper-edge);
  border: 1px solid var(--rule);
}
.figure--wide .figure-frame { aspect-ratio: 16 / 9; }
.figure--tall .figure-frame { aspect-ratio: 3 / 4; }
.figure-frame img { width: 100%; height: 100%; object-fit: cover; }
.figure-frame--empty::after {
  content: "门 · 光 · 路径";
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .24em;
  color: var(--ink-soft);
  opacity: .55;
}
.figure-cap { margin-top: .6rem; font-family: var(--font-mono); font-size: .7rem; letter-spacing: .08em; color: var(--ink-soft); }

.disclosure { border-top: 1px solid var(--rule); }
.disclosure:last-child { border-bottom: 1px solid var(--rule); }
.disclosure-btn {
  display: flex;
  width: 100%;
  align-items: flex-start;
  gap: 1rem;
  padding: 1.15rem 0;
  text-align: left;
  color: var(--ink);
  transition: color var(--fast) var(--ease);
}
.disclosure-btn:hover { color: var(--cinnabar); }
.disclosure-btn[aria-expanded="true"] { color: var(--cinnabar); }
.disclosure-q {
  flex: 1 1 auto;
  font-family: var(--font-serif);
  font-weight: 400;
  font-size: clamp(1.02rem, .98rem + .4vw, 1.22rem);
  line-height: 1.65;
}
.disclosure-icon {
  position: relative;
  flex: none;
  width: 22px;
  height: 22px;
  margin-top: .3rem;
  border: 1px solid var(--rule);
  transition: border-color var(--fast) var(--ease);
}
.disclosure-icon::before,
.disclosure-icon::after {
  content: "";
  position: absolute;
  left: 4px;
  right: 4px;
  top: 10px;
  height: 1px;
  background: currentColor;
}
.disclosure-icon::after { transform: rotate(90deg); transition: transform var(--fast) var(--ease); }
.disclosure-btn[aria-expanded="true"] .disclosure-icon { border-color: var(--cinnabar); }
.disclosure-btn[aria-expanded="true"] .disclosure-icon::after { transform: rotate(0deg); }
.disclosure-panel { max-width: 44rem; padding-bottom: 1.5rem; color: var(--ink-soft); }
.disclosure-panel[hidden] { display: none; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .5rem;
  padding: .65rem 1.15rem;
  border: 1px solid var(--rule);
  background: transparent;
  color: var(--ink);
  font-size: .92rem;
  letter-spacing: .04em;
  line-height: 1.4;
  transition: color var(--fast) var(--ease), background-color var(--fast) var(--ease),
              border-color var(--fast) var(--ease), filter var(--fast) var(--ease);
}
.btn:hover { border-color: var(--ink); }
.btn-door {
  border-color: #C88A28;
  background: var(--door-gradient);
  color: #2A1C06;
  box-shadow: 0 0 0 1px rgba(217, 164, 65, .3);
}
.btn-door:hover { filter: brightness(1.06); border-color: #B5761C; }
.btn-line { border-color: var(--cinnabar); color: var(--cinnabar); }
.btn-line:hover { background: var(--cinnabar); border-color: var(--cinnabar); color: var(--paper); }
.btn-quiet { border-color: transparent; color: var(--ink-soft); padding-inline: .5rem; }
.btn-quiet:hover { color: var(--cinnabar); }

/* ---------- 7. Header ---------- */
.skip-link {
  position: fixed;
  top: .5rem;
  left: .5rem;
  z-index: 200;
  padding: .55rem 1rem;
  background: var(--ink);
  color: var(--paper);
  font-size: .85rem;
  transform: translateY(-180%);
  transition: transform var(--fast) var(--ease);
}
.skip-link:focus { transform: translateY(0); }

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 140;
  background-color: rgba(246, 241, 231, .62);
  border-bottom: 1px solid transparent;
  transition: background-color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.site-header.is-scrolled,
.site-header.is-nav-open { background-color: var(--paper); border-bottom-color: var(--rule); }

.hinge-line {
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, transparent, var(--cinnabar) 24%, var(--cinnabar) 76%, transparent);
  opacity: .45;
}
.header-inner {
  position: relative;
  z-index: 130;
  display: flex;
  align-items: center;
  gap: clamp(.75rem, 2.5vw, 2rem);
  width: 100%;
  max-width: var(--measure);
  margin-inline: auto;
  padding: .6rem var(--gutter);
  min-height: var(--header-h);
}
.brand { display: flex; align-items: center; gap: .7rem; flex: none; }
.brand-glyph {
  position: relative;
  flex: none;
  width: 30px;
  height: 30px;
  border: 1px solid var(--ink);
}
.brand-glyph::before { content: ""; position: absolute; left: 6px; top: 0; bottom: 0; width: 1px; background: var(--rule); }
.brand-glyph::after {
  content: "";
  position: absolute;
  right: 6px;
  top: 50%;
  width: 3px;
  height: 3px;
  border-radius: 50%;
  background: var(--cinnabar);
  transform: translateY(-50%);
}
.brand-text { display: flex; flex-direction: column; line-height: 1.15; }
.brand-name { font-family: var(--font-serif); font-size: 1.1rem; font-weight: 500; letter-spacing: .06em; color: var(--ink); }
.brand-sub { font-family: var(--font-mono); font-size: .6rem; letter-spacing: .14em; color: var(--ink-soft); opacity: .85; }
.brand:hover .brand-name { color: var(--cinnabar); }

.site-nav { margin-left: auto; }
.nav-list { display: flex; align-items: center; gap: .1rem; }
.nav-link {
  position: relative;
  display: inline-flex;
  align-items: baseline;
  gap: .4rem;
  padding: .5rem .6rem;
  color: var(--ink-soft);
  font-size: .9rem;
  line-height: 1.6;
  transition: color var(--fast) var(--ease);
}
.nav-link::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 2px;
  height: 0;
  background: var(--cinnabar);
  transform: translateY(-50%);
  transition: height var(--fast) var(--ease);
}
.nav-link:hover { color: var(--ink); }
.nav-link:hover::before { height: 12px; }
.nav-link[aria-current="page"] { color: var(--cinnabar); }
.nav-link[aria-current="page"]::before { height: 16px; }
.nav-num { font-family: var(--font-mono); font-size: .62rem; letter-spacing: .14em; opacity: .6; }
.nav-label { white-space: nowrap; }
.nav-cta { display: none; }
.nav-foot-note { display: none; }

.header-actions { display: flex; align-items: center; gap: .6rem; margin-left: 1rem; }
.header-door { white-space: nowrap; }
.nav-toggle {
  display: none;
  align-items: center;
  gap: .5rem;
  padding: .45rem .6rem;
  border: 1px solid var(--rule);
  color: var(--ink);
  transition: border-color var(--fast) var(--ease), color var(--fast) var(--ease);
}
.nav-toggle:hover { border-color: var(--ink); color: var(--cinnabar); }
.nav-toggle-box { display: flex; flex-direction: column; justify-content: space-between; width: 22px; height: 16px; }
.nav-toggle-bar { display: block; height: 1px; background: currentColor; transition: transform var(--fast) var(--ease); }
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:first-child { transform: translateY(7.5px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:last-child { transform: translateY(-7.5px) rotate(-45deg); }
.nav-toggle-text { font-family: var(--font-mono); font-size: .68rem; letter-spacing: .16em; }
.nav-scrim { display: none; }

@media (max-width: 1000px) {
  .site-nav {
    position: fixed;
    top: 0;
    bottom: 0;
    left: 0;
    z-index: 120;
    display: block;
    width: min(20rem, 84vw);
    margin: 0;
    padding: calc(var(--header-h) + 1.75rem) var(--gutter) 2.5rem;
    background: var(--paper);
    border-right: 1px solid var(--rule);
    overflow-y: auto;
    transform: translateX(-100%);
    transition: transform var(--dur) var(--ease);
  }
  .site-nav[data-open] { transform: translateX(0); }
  .nav-list { flex-direction: column; align-items: stretch; gap: 0; }
  .nav-item { border-bottom: 1px solid var(--rule); }
  .nav-link { padding: .85rem .25rem; font-size: 1rem; }
  .nav-link::before { left: -.3rem; }
  .nav-cta { display: inline-flex; margin-top: 1.5rem; }
  .nav-foot-note {
    display: block;
    margin-top: 1.25rem;
    font-family: var(--font-mono);
    font-size: .68rem;
    letter-spacing: .1em;
    line-height: 1.9;
    color: var(--ink-soft);
  }
  .nav-toggle { display: inline-flex; }
  .header-actions { margin-left: auto; }
  .nav-scrim {
    display: block;
    position: fixed;
    inset: 0;
    z-index: 110;
    background: rgba(29, 42, 51, .34);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--dur) var(--ease), visibility var(--dur) var(--ease);
  }
  .nav-scrim.is-on { opacity: 1; visibility: visible; }
}
html.has-nav-open { overflow: hidden; }

/* ---------- 8. Footer ---------- */
.site-footer { position: relative; margin-top: clamp(4rem, 10vw, 8rem); background: var(--indigo); color: var(--paper-edge); }
.site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(to right, transparent, var(--amber) 30%, var(--amber) 70%, transparent);
  opacity: .55;
}
.footer-inner {
  display: grid;
  gap: clamp(2rem, 5vw, 3rem);
  width: 100%;
  max-width: var(--measure);
  margin-inline: auto;
  padding: clamp(2.75rem, 6vw, 4.5rem) var(--gutter) 2.25rem;
}
@media (min-width: 900px) {
  .footer-inner {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 1.95fr);
    grid-template-areas: "brand index" "contact legal";
    column-gap: clamp(2rem, 5vw, 4.5rem);
  }
  .footer-brand { grid-area: brand; }
  .footer-index { grid-area: index; }
  .footer-contact { grid-area: contact; }
  .footer-legal { grid-area: legal; }
}
.footer-motif {
  font-family: var(--font-serif);
  font-weight: 300;
  font-size: clamp(1.35rem, 1.1rem + 1.2vw, 2rem);
  line-height: 1.35;
  letter-spacing: .08em;
  color: var(--paper);
}
.footer-brand-name {
  display: inline-block;
  margin-top: 1.1rem;
  font-family: var(--font-serif);
  font-size: 1rem;
  letter-spacing: .12em;
  color: var(--paper);
  border-bottom: 1px solid transparent;
  transition: border-color var(--fast) var(--ease), color var(--fast) var(--ease);
}
.footer-brand-name:hover { color: var(--amber); border-bottom-color: var(--amber); }
.footer-line { margin-top: .7rem; font-size: .9rem; color: rgba(232, 225, 211, .78); }
.footer-desc { margin-top: .8rem; max-width: 24rem; font-size: .88rem; color: rgba(232, 225, 211, .6); }

.footer-index { display: grid; gap: 1.75rem; }
@media (min-width: 620px) { .footer-index { grid-template-columns: repeat(3, minmax(0, 1fr)); } }
.footer-col-title { font-family: var(--font-mono); font-size: .68rem; font-weight: 400; letter-spacing: .2em; color: var(--amber); }
.footer-list { display: grid; gap: .55rem; margin-top: 1rem; }
.footer-link {
  position: relative;
  display: inline-block;
  padding-left: .85rem;
  font-size: .92rem;
  color: rgba(232, 225, 211, .86);
  transition: color var(--fast) var(--ease);
}
.footer-link::before {
  content: "";
  position: absolute;
  left: 0;
  top: .6em;
  width: 6px;
  height: 1px;
  background: var(--cinnabar);
  transition: width var(--fast) var(--ease);
}
.footer-link:hover { color: var(--paper); }
.footer-link:hover::before { width: 12px; }

.contact-list { display: grid; gap: .75rem; margin-top: 1rem; }
.contact-item { display: flex; flex-wrap: wrap; align-items: baseline; gap: .4rem .75rem; font-size: .92rem; }
.contact-key { min-width: 4.5rem; font-family: var(--font-mono); font-size: .68rem; letter-spacing: .16em; color: rgba(232, 225, 211, .55); }
.contact-value { color: var(--paper); word-break: break-word; }
.contact-value--mono { font-family: var(--font-mono); letter-spacing: .04em; }
.copy-btn {
  padding: .12rem .45rem;
  border: 1px solid rgba(232, 225, 211, .3);
  font-family: var(--font-mono);
  font-size: .64rem;
  letter-spacing: .12em;
  color: rgba(232, 225, 211, .78);
  transition: color var(--fast) var(--ease), background-color var(--fast) var(--ease), border-color var(--fast) var(--ease);
}
.copy-btn:hover { color: #2A1C06; background: var(--amber); border-color: var(--amber); }
.footer-ask { margin-top: 1.4rem; border-color: rgba(232, 225, 211, .3); color: var(--paper); }
.footer-ask:hover { border-color: var(--amber); color: var(--amber); }

.footer-legal { display: grid; gap: .45rem; align-content: start; justify-items: start; }
@media (min-width: 900px) { .footer-legal { justify-items: end; text-align: right; } }
.legal-line { font-family: var(--font-mono); font-size: .7rem; letter-spacing: .08em; color: rgba(232, 225, 211, .58); }
.to-top {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  margin-top: .85rem;
  padding: .5rem .8rem;
  border: 1px solid rgba(232, 225, 211, .28);
  color: rgba(232, 225, 211, .85);
  font-size: .82rem;
  letter-spacing: .06em;
  transition: color var(--fast) var(--ease), border-color var(--fast) var(--ease);
}
.to-top::after { content: "↑"; font-family: var(--font-mono); }
.to-top:hover { color: var(--amber); border-color: var(--amber); }

/* ---------- 9. Motion & feedback ---------- */
.js-ready [data-reveal] {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 600ms var(--ease), transform 600ms var(--ease);
}
.js-ready [data-reveal].is-in { opacity: 1; transform: none; }

.scroll-progress {
  position: absolute;
  left: 0;
  bottom: -1px;
  height: 2px;
  width: 0;
  pointer-events: none;
  background: linear-gradient(to right, var(--cinnabar), var(--amber));
  transition: width 120ms linear;
}
.toast {
  position: fixed;
  left: 50%;
  bottom: 1.5rem;
  z-index: 200;
  padding: .6rem 1rem;
  border-left: 2px solid var(--cinnabar);
  background: var(--ink);
  color: var(--paper);
  font-size: .85rem;
  letter-spacing: .04em;
  opacity: 0;
  visibility: hidden;
  transform: translate(-50%, 1rem);
  transition: opacity var(--fast) var(--ease), transform var(--fast) var(--ease), visibility var(--fast) var(--ease);
}
.toast.is-on { opacity: 1; visibility: visible; transform: translate(-50%, 0); }

/* ---------- 10. Responsive tweaks ---------- */
@media (max-width: 720px) {
  :root { --header-h: 62px; }
  .brand-sub { display: none; }
  .brand-glyph { width: 26px; height: 26px; }
}
@media (max-width: 560px) {
  .header-door { display: none; }
  .nav-toggle-text { display: none; }
  .contact-item { flex-direction: column; align-items: flex-start; gap: .3rem; }
}

/* ---------- 11. 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;
  }
  .door-light { animation: none; opacity: 1; transform: skewX(-12deg); }
  .js-ready [data-reveal] { opacity: 1; transform: none; }
}