:root {
  --paper: #f5f0e6;
  --paper-deep: #ece4d4;
  --ink: #1f1c19;
  --ink-soft: #5d554b;
  --ink-faint: #8c8376;
  --line: #d8cebd;
  --seal: #b03a2a;
  --serif: "Cormorant Garamond", "Noto Serif SC", Georgia, serif;
  --zh: "Noto Serif SC", "Songti SC", serif;
  --brush: "Ma Shan Zheng", "Kaiti SC", "STKaiti", serif;
  color-scheme: light;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--serif);
  font-size: 19px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  /* faint paper fibre */
  background-image:
    radial-gradient(circle at 20% 10%, rgba(255,255,255,.55), transparent 50%),
    radial-gradient(circle at 85% 70%, rgba(214,200,175,.25), transparent 55%);
}
html[lang="zh"] body { font-family: var(--zh); font-size: 17px; line-height: 1.9; }
img { display: block; max-width: 100%; }
a { color: inherit; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; padding: 0; }

/* ---------- header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 10;
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px clamp(16px, 5vw, 64px);
  background: rgba(245, 240, 230, .88);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid transparent;
  transition: border-color .3s;
}
.site-header.scrolled { border-bottom-color: var(--line); }
.brand { display: flex; align-items: center; gap: 12px; text-decoration: none; }
.seal {
  display: grid; grid-template-rows: 1fr 1fr; place-items: center;
  width: 38px; height: 38px;
  background: var(--seal); color: #fbf3ea;
  font-family: var(--brush); font-size: 16px; line-height: 1;
  border-radius: 3px;
  box-shadow: inset 0 0 0 2px var(--seal), inset 0 0 0 3px rgba(251,243,234,.6);
  padding: 3px 0;
}
.brand-name { font-size: 20px; letter-spacing: .06em; }
.nav { display: flex; align-items: center; gap: clamp(14px, 3vw, 32px); font-size: 17px; }
.nav a { text-decoration: none; color: var(--ink-soft); transition: color .2s; }
.nav a:hover { color: var(--ink); }
.lang-toggle { display: flex; gap: 4px; align-items: baseline; font-size: 15px; color: var(--ink-faint); }
.lang-toggle .sep { opacity: .5; }
html[lang="zh"] .lang-toggle [data-lang="zh"],
html[lang="en"] .lang-toggle [data-lang="en"] { color: var(--seal); font-weight: 600; }

/* ---------- hero ---------- */
.hero {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 5fr) minmax(0, 6fr);
  gap: clamp(32px, 6vw, 96px);
  align-items: center;
  padding: clamp(40px, 8vh, 96px) clamp(16px, 7vw, 120px) clamp(56px, 10vh, 120px);
  max-width: 1400px; margin: 0 auto;
}
.eyebrow { margin: 0 0 18px; color: var(--ink-faint); letter-spacing: .18em; text-transform: uppercase; font-size: 14px; }
html[lang="zh"] .eyebrow { letter-spacing: .3em; }
.hero h1 { margin: 0; font-weight: 400; line-height: 1; }
.hero-zh { display: block; font-family: var(--brush); font-size: clamp(84px, 12vw, 156px); letter-spacing: .04em; }
.hero-en { display: block; margin-top: 14px; font-size: clamp(24px, 2.6vw, 34px); letter-spacing: .32em; color: var(--ink-soft); text-transform: uppercase; }
.tagline { max-width: 26em; margin: 28px 0 36px; color: var(--ink-soft); font-size: 1.12em; font-style: italic; }
html[lang="zh"] .tagline { font-style: normal; }
.cta {
  display: inline-block; text-decoration: none;
  padding: 10px 26px; border: 1px solid var(--ink);
  letter-spacing: .12em; font-size: 15px; text-transform: uppercase;
  transition: background .25s, color .25s;
}
.cta:hover { background: var(--ink); color: var(--paper); }
.hero-art { margin: 0; }
.hero-img-btn { display: block; width: 100%; }
.hero-art img {
  width: 100%; height: auto;
  box-shadow: 0 1px 2px rgba(60,45,30,.12), 0 18px 50px -18px rgba(60,45,30,.35);
}
.hero-art figcaption { margin-top: 14px; font-size: 15px; color: var(--ink-faint); text-align: right; }
.vertical-poem {
  position: absolute; right: clamp(4px, 2vw, 36px); top: 50%; transform: translateY(-50%);
  writing-mode: vertical-rl; margin: 0;
  font-family: var(--zh); font-size: 14px; letter-spacing: .5em; color: var(--ink-faint);
}

/* ---------- gallery ---------- */
.gallery-section { padding: 56px clamp(16px, 5vw, 64px) 96px; max-width: 1400px; margin: 0 auto; }
.section-head {
  display: flex; align-items: baseline; justify-content: space-between; flex-wrap: wrap; gap: 16px;
  border-top: 1px solid var(--line); padding-top: 28px; margin-bottom: 40px;
}
h2 { margin: 0; font-weight: 400; font-size: clamp(30px, 3.4vw, 42px); letter-spacing: .04em; }
html[lang="zh"] h2 { font-family: var(--brush); letter-spacing: .12em; }
.filters { display: flex; gap: 6px; flex-wrap: wrap; }
.filters button {
  padding: 4px 14px; font-size: 16px; color: var(--ink-soft);
  border-bottom: 1px solid transparent; transition: color .2s, border-color .2s;
}
.filters button:hover { color: var(--ink); }
.filters button[aria-pressed="true"] { color: var(--ink); border-bottom-color: var(--seal); }

.gallery { columns: 3 300px; column-gap: clamp(24px, 3vw, 48px); }
.card {
  break-inside: avoid; margin: 0 0 clamp(32px, 4vw, 56px);
  display: block; width: 100%; text-align: left;
  animation: fade-in .6s both;
}
.card[hidden] { display: none; }
.card-img { overflow: hidden; background: var(--paper-deep); }
.card img {
  width: 100%; height: auto;
  transition: transform .8s cubic-bezier(.2,.7,.2,1), filter .4s;
}
.card:hover img { transform: scale(1.025); }
.card-cap { display: flex; justify-content: space-between; gap: 12px; margin-top: 12px; }
.card-title { font-size: 19px; }
.card-title .zh { font-family: var(--zh); margin-right: 10px; }
.card-year { color: var(--ink-faint); font-size: 15px; white-space: nowrap; }
@keyframes fade-in { from { opacity: 0; transform: translateY(10px); } }

/* ---------- about ---------- */
.about {
  display: grid; grid-template-columns: auto minmax(0, 40em);
  justify-content: center; gap: clamp(28px, 6vw, 96px);
  padding: 96px clamp(16px, 5vw, 64px) 120px;
  background: var(--paper-deep);
}
.about-mark {
  writing-mode: vertical-rl;
  font-family: var(--brush); font-size: clamp(56px, 7vw, 96px); line-height: 1;
  color: var(--seal); opacity: .85;
}
.about-body h2 { margin-bottom: 24px; }
.about-body p { margin: 0 0 1.1em; color: #3b352f; }
.about-body p:first-of-type::first-letter {
  font-size: 3.2em; float: left; line-height: .9; padding: 6px 10px 0 0; color: var(--seal);
}
html[lang="zh"] .about-body p:first-of-type::first-letter { font-family: var(--brush); font-size: 2.6em; }

/* ---------- footer ---------- */
.site-footer {
  padding: 48px clamp(16px, 5vw, 64px);
  text-align: center; color: var(--ink-faint); font-size: 15px;
}
.site-footer p { margin: 6px 0; }
.contact a { color: var(--ink-soft); text-underline-offset: 3px; text-decoration-color: var(--line); }
.contact a:hover { color: var(--seal); text-decoration-color: currentColor; }

/* ---------- viewer ---------- */
.viewer { position: fixed; inset: 0; z-index: 50; }
.viewer[hidden] { display: none; }
.viewer-backdrop { position: absolute; inset: 0; background: rgba(30, 26, 22, .55); backdrop-filter: blur(4px); animation: fade .3s; }
.viewer-panel {
  position: absolute; inset: clamp(0px, 3vw, 40px);
  display: grid; grid-template-columns: minmax(0, 1fr) 360px;
  background: var(--paper); overflow: hidden;
  box-shadow: 0 30px 80px rgba(0,0,0,.35);
  animation: rise .35s cubic-bezier(.2,.7,.2,1);
}
@keyframes fade { from { opacity: 0; } }
@keyframes rise { from { opacity: 0; transform: translateY(16px); } }
.v-close {
  position: absolute; top: 10px; right: 14px; z-index: 2;
  font-size: 34px; line-height: 1; color: var(--ink-soft); width: 44px; height: 44px;
}
.v-close:hover { color: var(--ink); }
.v-stage {
  position: relative; overflow: auto; background: var(--paper-deep);
  display: grid; place-items: center; padding: clamp(16px, 3vw, 48px);
  cursor: zoom-in;
}
.v-stage img { max-width: 100%; max-height: calc(100vh - 180px); object-fit: contain; box-shadow: 0 10px 40px -12px rgba(60,45,30,.4); }
.v-stage.zoomed { display: block; padding: 0; cursor: zoom-out; }
.v-stage.zoomed img { max-width: none; max-height: none; width: 220%; box-shadow: none; }
.v-hint { position: absolute; bottom: 8px; left: 0; right: 0; margin: 0; text-align: center; font-size: 13px; color: var(--ink-faint); pointer-events: none; }
.v-stage.zoomed .v-hint { display: none; }
.v-info { padding: 64px 36px 28px; overflow-y: auto; display: flex; flex-direction: column; }
.v-cat { margin: 0 0 10px; font-size: 13px; letter-spacing: .2em; text-transform: uppercase; color: var(--seal); }
.v-info h3 { margin: 0; font-weight: 400; font-size: 38px; line-height: 1.15; }
html[lang="zh"] .v-info h3 { font-family: var(--brush); font-size: 46px; letter-spacing: .08em; }
.v-subtitle { margin: 6px 0 0; color: var(--ink-faint); font-size: 18px; }
.v-meta { display: grid; grid-template-columns: auto 1fr; gap: 6px 18px; margin: 28px 0; padding: 18px 0; border-block: 1px solid var(--line); font-size: 16px; }
.v-meta dt { color: var(--ink-faint); }
.v-meta dd { margin: 0; }
.tbd { color: var(--ink-faint); font-style: italic; }
.v-note { margin: 0 0 24px; color: #3b352f; }
.v-framed {
  align-self: flex-start; margin-bottom: 12px; font-size: 15px; color: var(--ink-soft);
  border-bottom: 1px solid var(--line);
}
.v-framed:hover { color: var(--ink); border-color: var(--ink); }
.v-framed[hidden] { display: none; }
.v-inquire { align-self: flex-start; font-size: 15px; color: var(--ink-faint); text-underline-offset: 3px; text-decoration-color: var(--line); }
.v-inquire:hover { color: var(--seal); }
.v-inquire[hidden], .contact[hidden] { display: none; }
.v-nav { margin-top: auto; padding-top: 28px; display: flex; align-items: center; justify-content: space-between; color: var(--ink-faint); font-size: 15px; }
.v-nav button { font-size: 24px; width: 44px; height: 44px; border: 1px solid var(--line); border-radius: 50%; color: var(--ink-soft); transition: border-color .2s, color .2s; }
.v-nav button:hover { border-color: var(--ink); color: var(--ink); }

/* ---------- responsive ---------- */
@media (max-width: 900px) {
  .hero { grid-template-columns: 1fr; padding-top: 32px; }
  .hero-art { order: -1; }
  .vertical-poem { display: none; }
  .about { grid-template-columns: 1fr; }
  .about-mark { writing-mode: horizontal-tb; font-size: 48px; }
  .viewer-panel { inset: 0; grid-template-columns: 1fr; grid-template-rows: 58vh auto; overflow-y: auto; }
  .v-stage img { max-height: calc(58vh - 32px); }
  .v-info { padding: 28px 20px 24px; overflow: visible; }
  .v-close { background: rgba(245,240,230,.85); border-radius: 50%; }
}
@media (max-width: 560px) {
  body { font-size: 17px; }
  .brand-name { display: none; }
  .gallery { columns: 1; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; scroll-behavior: auto !important; }
}