/* =========================================================
   Jing Yan — Personal Site
   Direction: Editorial magazine
   Fonts: Playfair Display + Inter
   ========================================================= */

:root {
  --bg:       #f8f5ef;
  --paper:    #fffcf7;
  --ink:      #15120f;
  --ink-soft: #5c5650;
  --muted:    #9d948b;
  --rule:     #ded6cc;
  --rule-soft:#ece5dc;
  --accent:   #9f2d24;
  --accent-soft: #ead8d2;
  --glass: rgba(255, 252, 247, 0.48);
  --glass-strong: rgba(255, 252, 247, 0.68);
  --glass-border: rgba(255, 255, 255, 0.72);
  --glass-shadow: rgba(72, 51, 39, 0.18);

  --text-xs:   13px;
  --text-sm:   15px;
  --text-base: 16.5px;
  --text-lg:   1.1rem;

  --space-section: clamp(3rem, 5vw, 5rem);
  --max-w: 980px;

  --duration: 200ms;
  --duration-slow: 520ms;
  --ease:     cubic-bezier(0.16, 1, 0.3, 1);
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: 'Inter', system-ui, sans-serif;
  font-size: var(--text-base);
  line-height: 1.65;
  color: var(--ink);
  background:
    radial-gradient(circle at 16% 14%, rgba(159, 45, 36, 0.08), transparent 24rem),
    radial-gradient(circle at 86% 22%, rgba(91, 116, 118, 0.12), transparent 20rem),
    linear-gradient(135deg, rgba(255, 252, 247, 0.96), rgba(244, 238, 229, 0.9) 58%, rgba(233, 224, 211, 0.92)),
    var(--bg);
  -webkit-font-smoothing: antialiased;
}

body::before,
body::after {
  content: '';
  position: fixed;
  left: 50%;
  z-index: -1;
  width: min(86rem, 150vw);
  pointer-events: none;
  transform: translateX(-50%);
}

body::before {
  top: 4.5rem;
  height: 34rem;
  background:
    radial-gradient(ellipse at 25% 34%, rgba(255, 255, 255, 0.62), transparent 34%),
    radial-gradient(ellipse at 74% 64%, rgba(159, 45, 36, 0.08), transparent 30%);
}

body::after {
  top: 19rem;
  height: 42rem;
  opacity: 0.78;
  background:
    linear-gradient(168deg, transparent 0 27%, rgba(208, 187, 162, 0.22) 27.2% 29.6%, transparent 29.8% 100%),
    linear-gradient(176deg, transparent 0 42%, rgba(172, 142, 116, 0.16) 42.2% 44.4%, transparent 44.6% 100%),
    linear-gradient(184deg, transparent 0 58%, rgba(159, 45, 36, 0.09) 58.2% 59.4%, transparent 59.6% 100%);
}

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

a {
  color: var(--accent);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  transition: color var(--duration);
}
a:hover { color: var(--ink); }

strong { font-weight: 600; }
em     { font-style: italic; }

code {
  font-size: 0.9em;
  background: rgba(0, 0, 0, 0.05);
  padding: 0.05em 0.35em;
}

hr.rule {
  border: none;
  border-top: 1px solid var(--rule);
  margin: clamp(1.5rem, 3vw, 2.5rem) 0;
}

/* ---------- Nav ---------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem clamp(1.25rem, 4vw, 2.5rem);
  background: rgba(255, 252, 247, 0.62);
  backdrop-filter: saturate(160%) blur(22px);
  -webkit-backdrop-filter: saturate(160%) blur(22px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.56);
  box-shadow: 0 14px 40px -36px var(--glass-shadow);
}

.nav-brand {
  font-family: 'Playfair Display', Georgia, serif;
  font-style: italic;
  font-size: 1.1rem;
  font-weight: 400;
  color: var(--ink);
  text-decoration: none;
  letter-spacing: 0.02em;
  transition: color var(--duration);
}
.nav-brand:hover { color: var(--accent); }

.nav-list {
  display: flex;
  gap: clamp(1.1rem, 3vw, 2rem);
  list-style: none;
  margin: 0;
  padding: 0;
}
.nav-list a {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
  text-decoration: none;
  transition: color var(--duration);
}
.nav-list a:hover     { color: var(--ink); }
.nav-list a.is-active { color: var(--accent); }
.nav-list a.is-active::after {
  content: '';
  display: block;
  width: 100%;
  height: 1px;
  margin-top: 0.25rem;
  background: currentColor;
  opacity: 0.7;
}

/* ---------- Main layout ---------- */
main {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: clamp(3rem, 6vw, 5.75rem) clamp(1.25rem, 4vw, 2.5rem) 0;
}


/* ---------- Display heading (name) + Chinese ---------- */
.display-zh {
  font-family: 'Ma Shan Zheng', cursive;
  font-style: normal;
  font-weight: 400;
  font-size: 0.48em;
  letter-spacing: 0.08em;
  color: var(--accent);
  vertical-align: middle;
  margin-left: 0.65em;
  text-shadow: 0 0.08em 0 rgba(159, 45, 36, 0.08);
}

.display {
  font-family: 'Playfair Display', Georgia, serif;
  font-style: italic;
  font-weight: 700;
  font-size: clamp(3.15rem, 5.4vw, 5.35rem);
  line-height: 1.08;
  letter-spacing: -0.015em;
  color: var(--ink);
  margin: 0;
}

/* ---------- Hero: avatar (photo) + bio (content) ---------- */
.bio-row {
  display: grid;
  grid-template-columns: minmax(230px, 310px) minmax(0, 1fr);
  gap: clamp(2.5rem, 6vw, 5rem);
  align-items: center;
  min-height: clamp(34rem, 72vh, 44rem);
  padding-bottom: clamp(3rem, 6vw, 5rem);
}

/* Avatar = sticky photo panel */
.avatar {
  position: sticky;
  top: 5rem;
  padding: 0.8rem;
  background:
    linear-gradient(145deg, rgba(255, 255, 255, 0.62), rgba(255, 252, 247, 0.3)),
    var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: 28px;
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.76),
    inset 0 -18px 46px rgba(159, 45, 36, 0.045),
    0 28px 70px -42px rgba(49, 40, 32, 0.66);
  backdrop-filter: blur(16px) saturate(132%);
  -webkit-backdrop-filter: blur(16px) saturate(132%);
  margin: 0;
  overflow: hidden;
  transition: border-color var(--duration), box-shadow var(--duration-slow),
              transform var(--duration-slow), background var(--duration);
}

.avatar img {
  width: 100%;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  filter: grayscale(0.04);
  border-radius: 22px;
  border: none;
  box-shadow: none;
  transition: filter var(--duration-slow), transform var(--duration-slow);
}

.avatar::after {
  content: '';
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(120deg, transparent 28%, rgba(255, 252, 247, 0.34) 48%, transparent 68%);
  opacity: 0;
  transform: translateX(-32%);
  transition: opacity var(--duration-slow), transform 760ms var(--ease);
}

.avatar:hover {
  border-color: rgba(159, 45, 36, 0.28);
  background:
    linear-gradient(145deg, rgba(255, 255, 255, 0.76), rgba(255, 252, 247, 0.44)),
    var(--glass-strong);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.82),
    inset 0 -18px 46px rgba(159, 45, 36, 0.06),
    0 34px 84px -40px rgba(74, 44, 36, 0.72);
  transform: translateY(-3px);
}

.avatar:hover img {
  filter: grayscale(0) saturate(1.03);
  transform: scale(1.012);
}

.avatar:hover::after {
  opacity: 1;
  transform: translateX(32%);
}

img.placeholder {
  width: 100%;
  aspect-ratio: 3 / 4;
  background: #e5e0d8;
  position: relative;
  opacity: 0;
}

.avatar:has(img.placeholder)::before,
.life-img:has(img.placeholder)::before {
  content: attr(alt);
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-xs);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--muted);
  background:
    linear-gradient(135deg, rgba(255, 252, 247, 0.34), rgba(222, 214, 204, 0.42)),
    #e8e1d8;
}

.avatar:has(img.placeholder)::before { content: 'PORTRAIT.JPG'; }
.life-img:has(img[alt='anime.jpg'].placeholder)::before { content: 'ANIME.JPG'; }
.life-img:has(img[alt='music.jpg'].placeholder)::before { content: 'MUSIC.JPG'; }
.life-img:has(img[alt='art.jpg'].placeholder)::before { content: 'ART.JPG'; }
.life-img:has(img[alt='travel.jpg'].placeholder)::before { content: 'TRAVEL.JPG'; }

.avatar-caption {
  margin-top: 1rem;
  text-align: center;
}

.avatar-role {
  display: block;
  font-family: 'Playfair Display', Georgia, serif;
  font-style: italic;
  font-weight: 400;
  font-size: 0.88rem;
  letter-spacing: 0.01em;
  color: var(--ink-soft);
  margin-bottom: 1rem;
  white-space: nowrap;
}

.avatar-links {
  display: flex;
  gap: 0.5rem;
  justify-content: center;
}
.avatar-links a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border: 1px solid rgba(255, 255, 255, 0.72);
  border-radius: 50%;
  color: var(--ink-soft);
  text-decoration: none;
  background: rgba(255, 252, 247, 0.44);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.8),
    0 10px 22px -18px rgba(49, 40, 32, 0.55);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition: color var(--duration), border-color var(--duration),
              transform var(--duration), background var(--duration);
}
.avatar-links a:hover {
  color: var(--accent);
  border-color: var(--accent-soft);
  background: var(--paper);
  transform: translateY(-2px);
}

/* Bio = content panel */
.bio {
  position: relative;
  padding-left: clamp(0rem, 2vw, 1.25rem);
}

/* Name block — no bottom border, divider handles separation */
.name-block {
  margin-bottom: 0;
  padding-bottom: 0;
  border-bottom: none;
}

/* Bio intro paragraph */
.bio-intro {
  font-family: 'Playfair Display', Georgia, serif;
  font-style: italic;
  font-weight: 400;
  font-size: clamp(1.08rem, 1.8vw, 1.36rem);
  line-height: 1.85;
  color: var(--ink-soft);
  margin: clamp(2.25rem, 5vw, 4rem) 0 0;
  max-width: 43ch;
  text-wrap: pretty;
  transition: color var(--duration), transform var(--duration-slow);
}

.bio:hover .bio-intro {
  color: #443d37;
  transform: translateX(0.35rem);
}

/* Horizontal education grid — full-width below hero */
.edu-horizontal {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: rgba(255, 255, 255, 0.22);
  border: 1px solid var(--glass-border);
  border-radius: 24px;
  overflow: hidden;
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.62),
    0 24px 68px -56px rgba(49, 40, 32, 0.5);
  backdrop-filter: blur(14px) saturate(124%);
  -webkit-backdrop-filter: blur(14px) saturate(124%);
}
.edu-horizontal li {
  position: relative;
  min-height: 12rem;
  padding: 1.25rem 1.4rem 1.5rem;
  background:
    linear-gradient(145deg, rgba(255, 255, 255, 0.56), rgba(255, 252, 247, 0.24)),
    rgba(255, 252, 247, 0.42);
  overflow: hidden;
  transition: background var(--duration), transform var(--duration),
              box-shadow var(--duration-slow);
}
.edu-horizontal li + li {
  padding-left: 1.4rem;
  padding-right: 1.4rem;
  border-left: none;
}
.edu-horizontal li:last-child {
  padding-right: 1.4rem;
}
.edu-horizontal li:hover {
  background:
    linear-gradient(145deg, rgba(255, 255, 255, 0.74), rgba(255, 252, 247, 0.36)),
    rgba(255, 252, 247, 0.62);
  transform: translateY(-2px);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.74),
    0 18px 42px -38px rgba(49, 40, 32, 0.55);
}
.edu-horizontal li.now::before {
  content: '';
  position: absolute;
  inset: 0 auto auto 0;
  width: 100%;
  height: 2px;
  background: var(--accent);
}
.edu-horizontal li::after {
  content: '';
  position: absolute;
  right: 1.1rem;
  bottom: 1.05rem;
  width: 1.65rem;
  height: 1px;
  background: var(--accent);
  opacity: 0;
  transform: scaleX(0.35);
  transform-origin: right;
  transition: opacity var(--duration), transform var(--duration-slow);
}
.edu-horizontal li:hover::after {
  opacity: 0.55;
  transform: scaleX(1);
}
.edu-horizontal .bio-date {
  display: block;
  margin-bottom: 0.7rem;
}
.edu-horizontal .bio-line {
  margin-bottom: 0.25rem;
  white-space: nowrap;
}
.edu-horizontal .bio-note {
  margin-top: 0.6rem;
}

/* ---------- Section divider ---------- */
.bio-divider {
  margin: 0 0 1.6rem;
  padding-top: 2.2rem;
  border-top: 1px solid var(--rule);
}

.bio-divider-label {
  font-size: 10.5px;
  font-weight: 600;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--muted);
}

/* ---------- Education entries ---------- */
.bio-entries {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
}

.bio-entries li {
  display: grid;
  grid-template-columns: 96px 1fr;
  gap: 1.75rem;
  padding: 1.75rem 0;
  border-left: none;
  border-bottom: 1px solid var(--rule);
  align-items: start;
  transition: none;
}
.bio-entries li:first-child { padding-top: 0; }
.bio-entries li:last-child  { border-bottom: none; }

.bio-date {
  font-family: 'Inter', sans-serif;
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.05em;
  text-transform: none;
  color: var(--muted);
  padding-top: 0.1rem;
  margin: 0;
}
.bio-entries li.now .bio-date,
.edu-horizontal li.now .bio-date { color: var(--accent); }

.bio-line {
  font-family: 'Playfair Display', Georgia, serif;
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--ink);
  margin: 0 0 0.3rem;
  line-height: 1.3;
}
.bio-entries li.now .bio-line { font-weight: 700; }

.bio-meta {
  font-family: 'Inter', sans-serif;
  font-size: var(--text-sm);
  color: var(--ink-soft);
  margin: 0;
  letter-spacing: 0.01em;
}

.bio-note {
  display: block;
  width: max-content;
  max-width: 100%;
  margin: 0.85rem 0 0;
  padding-top: 0.55rem;
  font-family: 'Inter', sans-serif;
  font-size: 10.5px;
  font-weight: 600;
  color: #7d6f64;
  letter-spacing: 0.08em;
  white-space: nowrap;
  border-top: 1px solid rgba(159, 45, 36, 0.24);
  background: none;
  box-shadow: none;
}

.bio p:not(.bio-intro) {
  margin: 0 0 0.75rem;
  font-size: var(--text-sm);
  line-height: 1.75;
}
.bio p:not(.bio-intro):last-child { margin-bottom: 0; }

/* ---------- Section blocks (research / life) ---------- */
.block     { padding-top: var(--space-section); }
.page-top  { padding-top: clamp(2rem, 4vw, 3.5rem); }

.block-title {
  font-family: 'Playfair Display', Georgia, serif;
  font-style: italic;
  font-weight: 700;
  font-size: clamp(3.25rem, 7vw, 5.75rem);
  line-height: 0.9;
  letter-spacing: -0.02em;
  margin: 0 0 2.5rem;
  color: var(--ink);
}

.sub-block-title {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  font-family: 'Inter', sans-serif;
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 2.5rem 0 1.5rem;
}
.sub-block-title::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
}

.block-lede {
  font-size: var(--text-sm);
  line-height: 1.75;
  color: var(--ink-soft);
  margin: 0 0 1.75rem;
  max-width: 60ch;
}

/* ---------- Research entries ---------- */
.entries {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
}

.entry {
  display: grid;
  grid-template-columns: 100px 1fr;
  gap: 1.75rem;
  padding: 1.75rem 0;
  border-bottom: 1px solid var(--rule);
  align-items: start;
}
.entry:last-child { border-bottom: none; }

.entry-date {
  font-family: 'Inter', sans-serif;
  font-size: 11px;
  font-weight: 500;
  color: var(--accent);
  letter-spacing: 0.04em;
  text-transform: none;
  padding-top: 0.15rem;
}

.entry-title {
  font-family: 'Playfair Display', Georgia, serif;
  font-size: var(--text-lg);
  font-weight: 400;
  color: var(--ink);
  margin: 0 0 0.3rem;
  line-height: 1.4;
}
.entry-title em { font-style: italic; color: var(--ink); }

.entry-meta {
  font-family: 'Inter', sans-serif;
  font-size: var(--text-sm);
  color: var(--ink-soft);
  margin: 0;
  letter-spacing: 0.01em;
}

.entry-note {
  margin: 0.5rem 0 0;
  font-family: 'Inter', sans-serif;
  font-size: var(--text-sm);
  color: var(--ink-soft);
}

.entry-bullets {
  list-style: none;
  padding: 0;
  margin: 0.6rem 0 0;
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  font-size: var(--text-sm);
  color: var(--ink-soft);
}
.entry-bullets li {
  padding-left: 1.1rem;
  position: relative;
}
.entry-bullets li::before {
  content: '—';
  position: absolute;
  left: 0;
  color: var(--muted);
}

/* Tags */
.tags {
  list-style: none;
  padding: 0;
  margin: 0 0 0.5rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}
.tags li {
  font-family: 'Inter', sans-serif;
  font-size: var(--text-xs);
  font-weight: 500;
  padding: 0.3rem 0.75rem;
  border: 1px solid var(--glass-border);
  border-radius: 999px;
  color: var(--ink-soft);
  letter-spacing: 0.06em;
  background: rgba(255, 252, 247, 0.46);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.64);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

/* ---------- Life grid ---------- */
.life-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  gap: 0.85rem;
  background: transparent;
  border: none;
  margin-top: 0.5rem;
}

.life-card {
  margin: 0;
  background:
    linear-gradient(145deg, rgba(255, 255, 255, 0.58), rgba(255, 252, 247, 0.28)),
    var(--glass);
  border-radius: 24px;
  border: 1px solid var(--glass-border);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.72),
    0 24px 58px -48px rgba(49, 40, 32, 0.56);
  backdrop-filter: blur(14px) saturate(124%);
  -webkit-backdrop-filter: blur(14px) saturate(124%);
  transition: background var(--duration), transform var(--duration-slow),
              box-shadow var(--duration-slow), border-color var(--duration);
}
.life-card:hover {
  background:
    linear-gradient(145deg, rgba(255, 255, 255, 0.74), rgba(255, 252, 247, 0.4)),
    var(--glass-strong);
  border-color: rgba(159, 45, 36, 0.18);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.8),
    0 30px 70px -48px rgba(49, 40, 32, 0.62);
  transform: translateY(-3px);
}

.life-img {
  aspect-ratio: 4 / 3;
  background: #ebe7df;
  overflow: hidden;
  position: relative;
  border-radius: 22px 22px 14px 14px;
}
.life-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: grayscale(0.08);
  transition: transform 600ms var(--ease);
}
.life-card:hover .life-img img { transform: scale(1.03); }

.life-card figcaption {
  padding: 1rem 1.25rem 1.25rem;
  font-family: 'Inter', sans-serif;
  font-size: var(--text-sm);
  line-height: 1.6;
  color: var(--ink-soft);
}
.life-tag {
  display: block;
  font-family: 'Inter', sans-serif;
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.35rem;
}

/* ---------- Facts / chips (optional) ---------- */
.facts {
  margin: 0 0 1.25rem;
  display: grid;
  grid-template-columns: 6.5rem 1fr;
  gap: 0.55rem 1.1rem;
  font-size: var(--text-sm);
}
.facts dt {
  font-family: 'Inter', sans-serif;
  font-size: var(--text-xs);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
  font-weight: 600;
  padding-top: 0.15rem;
}
.facts dd { margin: 0; color: var(--ink); }

.chip {
  display: inline-block;
  font-family: 'Inter', sans-serif;
  font-size: var(--text-xs);
  padding: 0.15rem 0.55rem;
  margin: 0.1rem 0.2rem 0.1rem 0;
  border: 1px solid var(--rule);
  color: var(--ink);
  white-space: nowrap;
}

/* ---------- Contact buttons ---------- */
.contact-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 0.9rem;
  border: 1px solid var(--ink);
  font-family: 'Inter', sans-serif;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink);
  text-decoration: none;
  background: transparent;
  transition: background var(--duration), color var(--duration);
}
.btn:hover { background: var(--ink); color: var(--bg); }

/* ---------- Footer ---------- */
.footer {
  max-width: var(--max-w);
  margin: var(--space-section) auto 0;
  padding: 0 clamp(1.25rem, 4vw, 2.5rem) 2.5rem;
}

.footer-panel {
  min-height: 5.4rem;
  padding: 1.2rem 1.25rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1.25rem;
  border: 1px solid var(--glass-border);
  border-radius: 28px;
  background:
    linear-gradient(145deg, rgba(255, 255, 255, 0.58), rgba(255, 252, 247, 0.28)),
    var(--glass);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.76),
    0 26px 68px -54px rgba(49, 40, 32, 0.6);
  backdrop-filter: blur(15px) saturate(126%);
  -webkit-backdrop-filter: blur(15px) saturate(126%);
  transition: background var(--duration), border-color var(--duration),
              transform var(--duration-slow), box-shadow var(--duration-slow);
}

.footer-panel:hover {
  background:
    linear-gradient(145deg, rgba(255, 255, 255, 0.76), rgba(255, 252, 247, 0.42)),
    var(--glass-strong);
  border-color: rgba(159, 45, 36, 0.22);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.82),
    0 30px 76px -50px rgba(49, 40, 32, 0.68);
  transform: translateY(-2px);
}

.footer-signature {
  display: flex;
  align-items: center;
  gap: clamp(0.9rem, 3vw, 1.8rem);
  min-width: 0;
  font-size: 10.5px;
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--muted);
}

.footer-signature span {
  position: relative;
  white-space: nowrap;
}

.footer-signature span:first-child {
  font-family: 'Playfair Display', Georgia, serif;
  font-size: 1rem;
  font-style: italic;
  font-weight: 700;
  letter-spacing: 0;
  text-transform: none;
  color: var(--ink);
}

.footer-signature span + span::before {
  content: '';
  position: absolute;
  top: 50%;
  left: calc(clamp(0.9rem, 3vw, 1.8rem) * -0.5);
  width: 1px;
  height: 0.8rem;
  background: var(--rule);
  transform: translateY(-50%);
}

.footer-mail {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  color: var(--muted);
  border: 1px solid rgba(255, 255, 255, 0.72);
  border-radius: 50%;
  text-decoration: none;
  background: rgba(255, 252, 247, 0.44);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.78);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition: color var(--duration), border-color var(--duration),
              transform var(--duration), background var(--duration);
}
.footer-mail:hover {
  color: var(--accent);
  border-color: var(--accent-soft);
  background: var(--paper);
  transform: translateY(-2px);
}
.footer-mail svg { display: block; }

.muted { color: var(--muted); }

/* ---------- Reveal animation ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 500ms var(--ease), transform 500ms var(--ease);
}
[data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- Responsive ---------- */
@media (max-width: 720px) {
  .bio-row {
    grid-template-columns: 1fr;
    gap: 2.25rem;
    min-height: 0;
    padding-bottom: 2.5rem;
  }
  .avatar {
    position: static;
    max-width: 280px;
    margin: 0 auto;
  }
  .avatar img { max-width: none; margin: 0 auto; }
  .bio { padding-left: 0; }
  .bio-entries li { grid-template-columns: 1fr; gap: 0.25rem; }
  .bio-date { padding-top: 0; }
  .entry { grid-template-columns: 1fr; gap: 0.25rem; }
  .entry-date { padding-top: 0; }
  .life-grid { grid-template-columns: 1fr; }
  .facts { grid-template-columns: 1fr; gap: 0.15rem 0; }
  .edu-horizontal {
    grid-template-columns: 1fr;
    gap: 1px;
  }
  .edu-horizontal li,
  .edu-horizontal li + li {
    min-height: 0;
    padding: 1.15rem 1.2rem;
    border-left: none;
  }
  .bio-note {
    width: fit-content;
    white-space: normal;
  }
  .edu-horizontal li:first-child {
    border-top: none;
  }
  .footer-panel {
    align-items: flex-start;
    flex-direction: column;
  }
  .footer-signature {
    align-items: flex-start;
    flex-direction: column;
    gap: 0.35rem;
  }
  .footer-signature span + span::before { display: none; }
}

@media (max-width: 480px) {
  main { padding-top: 2.25rem; }
  .nav {
    align-items: flex-start;
    gap: 0.8rem;
  }
  .nav-list { gap: 1.1rem; }
  .nav-list a { font-size: 9.5px; }
  .display-zh {
    display: block;
    margin: 0.35rem 0 0;
  }
  .edu-horizontal .bio-line { font-size: 1rem; }
  .bio-intro { margin-top: 1.8rem; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
  html { scroll-behavior: auto; }
  [data-reveal] { opacity: 1; transform: none; }
}