/* ── Reset & Base ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg:           #fdf8f4;   /* warm ivory */
  --bg-soft:      #f4eef8;   /* pale lavender wash */
  --text:         #2c2030;   /* deep plum-charcoal */
  --muted:        #9a879f;   /* dusty mauve */
  --accent:       #7a5c8c;   /* plum violet */
  --accent-soft:  #ede3f5;   /* pale lilac */
  --rose:         #c9909e;   /* dusty rose */
  --border:       #e4d8ee;   /* soft lavender border */
  --radius:       4px;
  --max-w:        900px;
}

html { scroll-behavior: smooth; }

body {
  font-family: 'Jost', sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.75;
  font-size: 16px;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ── Nav ── */
header {
  position: sticky;
  top: 0;
  background: rgba(253, 248, 244, 0.88);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  z-index: 100;
}

.nav {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 32px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-family: 'Cormorant Garamond', serif;
  font-weight: 600;
  font-size: 1.35rem;
  color: var(--text);
  letter-spacing: 0.04em;
}
.nav-logo:hover { text-decoration: none; }

.nav-links {
  list-style: none;
  display: flex;
  gap: 36px;
}

.nav-links a {
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  transition: color 0.2s;
}
.nav-links a:hover,
.nav-links a.active { color: var(--accent); text-decoration: none; }

.nav-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.4rem;
  cursor: pointer;
  color: var(--text);
}

/* ── Hero ── */
main {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 80px 32px 100px;
}

.hero {
  display: flex;
  align-items: center;
  gap: 72px;
}

.hero-text { flex: 1; }

/* Decorative rule above name */
.hero-text::before {
  content: '';
  display: block;
  width: 40px;
  height: 1.5px;
  background: var(--rose);
  margin-bottom: 24px;
}

.hero-text h1 {
  font-family: 'Cormorant Garamond', serif;
  font-size: 3.2rem;
  font-weight: 600;
  line-height: 1.1;
  letter-spacing: 0.01em;
  margin-bottom: 4px;
  color: var(--text);
}

.name-cn {
  font-family: 'Cormorant Garamond', 'Songti SC', 'STSong', serif;
  font-size: 1rem;
  font-weight: 300;
  color: var(--rose);
  letter-spacing: 0.08em;
  margin-left: 4px;
}

.pronunciation {
  font-family: 'Jost', sans-serif;
  font-size: 0.82rem;
  font-weight: 300;
  color: var(--muted);
  letter-spacing: 0.06em;
}

.subtitle {
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--rose);
  margin: 10px 0 28px;
}

.bio {
  font-size: 0.97rem;
  color: var(--text);
  margin-bottom: 18px;
  max-width: 500px;
  line-height: 1.85;
}

.links {
  display: flex;
  gap: 14px;
  margin: 32px 0 0;
  flex-wrap: wrap;
  align-items: center;
}

/* Elegant text-style buttons */
.btn {
  display: inline-block;
  padding: 10px 28px;
  font-family: 'Jost', sans-serif;
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  background: var(--accent);
  color: #fff;
  border-radius: var(--radius);
  transition: background 0.2s, transform 0.15s;
}
.btn:hover { background: #634a75; text-decoration: none; transform: translateY(-1px); }

.btn-outline {
  background: transparent;
  border: 1px solid var(--accent);
  color: var(--accent);
}
.btn-outline:hover { background: var(--accent-soft); transform: translateY(-1px); }

.social {
  display: flex;
  gap: 10px;
  align-items: center;
  font-size: 0.82rem;
  color: var(--muted);
  flex-wrap: wrap;
}
.social a { color: var(--muted); }
.social a:hover { color: var(--accent); }

/* ── Photo ── */
.hero-image { flex-shrink: 0; }

.photo-blob {
  width: 220px;
  height: 260px;
  border-radius: 56% 44% 60% 40% / 52% 48% 52% 48%;
  overflow: hidden;
  background: var(--accent-soft);
  animation: morph 10s ease-in-out infinite;
  box-shadow: 0 8px 40px rgba(122, 92, 140, 0.15);
}

.photo-blob img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center top;
  display: block;
}

@keyframes morph {
  0%, 100% { border-radius: 56% 44% 60% 40% / 52% 48% 52% 48%; }
  33%       { border-radius: 44% 56% 48% 52% / 60% 40% 60% 40%; }
  66%       { border-radius: 52% 48% 44% 56% / 44% 56% 44% 56%; }
}

/* ── Research page ── */
.page-header {
  margin-bottom: 56px;
}

.page-header::before {
  content: '';
  display: block;
  width: 40px;
  height: 1.5px;
  background: var(--rose);
  margin-bottom: 20px;
}

.page-title {
  font-family: 'Cormorant Garamond', serif;
  font-size: 2.6rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  margin-bottom: 12px;
}

.section-intro {
  font-size: 0.95rem;
  color: var(--muted);
  max-width: 520px;
  line-height: 1.85;
}

.paper-list { display: flex; flex-direction: column; gap: 0; }

.paper {
  padding: 32px 0;
  border-bottom: 1px solid var(--border);
  transition: background 0.2s;
}
.paper:first-child { border-top: 1px solid var(--border); }

.paper-title {
  font-family: 'Cormorant Garamond', serif;
  font-size: 1.3rem;
  font-weight: 600;
  line-height: 1.3;
  margin-bottom: 6px;
  color: var(--text);
}

.paper-authors {
  color: var(--muted);
  font-size: 0.85rem;
  margin-bottom: 6px;
}

.paper-venue {
  font-size: 0.82rem;
  font-style: italic;
  color: var(--rose);
  margin-bottom: 14px;
}

.paper-abstract {
  font-size: 0.92rem;
  color: var(--text);
  line-height: 1.8;
  margin-bottom: 16px;
  max-width: 640px;
}

.paper-conferences,
.paper-methods {
  font-size: 0.82rem;
  color: var(--muted);
  margin-bottom: 16px;
  line-height: 1.7;
}

.conf-label {
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  font-size: 0.72rem;
  color: var(--accent);
  margin-right: 6px;
}

.paper-links { display: flex; gap: 12px; flex-wrap: wrap; }

.footnote-mark {
  color: var(--rose);
  font-size: 0.85em;
  vertical-align: super;
  line-height: 0;
}

.footnote-text {
  margin-top: 32px;
  font-size: 0.8rem;
  color: var(--muted);
  font-style: italic;
}

.tag {
  display: inline-block;
  padding: 4px 14px;
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  background: var(--accent-soft);
  color: var(--accent);
  transition: background 0.2s;
}
.tag:hover { background: var(--border); text-decoration: none; }

/* ── Experience: Cities ── */
.cities-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0;
  margin-bottom: 80px;
}

.city-card {
  padding: 28px 0;
  border-bottom: 1px solid var(--border);
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 24px;
  align-items: baseline;
}

.city-card:nth-child(odd) { padding-right: 48px; border-right: 1px solid var(--border); }
.city-card:nth-child(even) { padding-left: 48px; }
.city-card:nth-last-child(-n+2) { border-bottom: none; }

.city-name {
  font-family: 'Cormorant Garamond', serif;
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--text);
  flex-shrink: 0;
}

.city-caption {
  font-size: 0.88rem;
  color: var(--muted);
  line-height: 1.7;
  font-style: italic;
}

/* ── Experience: Gallery ── */
.gallery-section { margin-top: 16px; }

.gallery-title {
  font-family: 'Cormorant Garamond', serif;
  font-size: 1.8rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.gallery-grid {
  margin-top: 32px;
  columns: 3;
  column-gap: 12px;
}

.gallery-grid img,
.gallery-placeholder {
  width: 100%;
  display: block;
  margin-bottom: 12px;
  border-radius: 4px;
  break-inside: avoid;
  object-fit: cover;
}

/* Placeholder blocks — remove once real photos are added */
.gallery-placeholder {
  background: var(--accent-soft);
  height: 180px;
}
.gallery-placeholder.tall  { height: 280px; }
.gallery-placeholder.wide  { height: 140px; }

/* ── Creative ── */
.creative-list { display: flex; flex-direction: column; gap: 0; }

.creative-item {
  padding: 32px 0;
  border-bottom: 1px solid var(--border);
}
.creative-item:first-child { border-top: 1px solid var(--border); }

.creative-kicker {
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--rose);
  margin-bottom: 8px;
}

.creative-title {
  font-family: 'Cormorant Garamond', serif;
  font-size: 1.5rem;
  font-weight: 600;
  line-height: 1.3;
  margin-bottom: 10px;
  color: var(--text);
}

.creative-body {
  font-size: 0.92rem;
  color: var(--text);
  line-height: 1.8;
  margin-bottom: 16px;
  max-width: 640px;
}

/* ── World Map ── */
.map-section {
  position: relative;
  margin-bottom: 80px;
}

.world-map {
  width: 100%;
  height: auto;
  display: block;
}

.continent {
  fill: var(--accent-soft);
  fill-opacity: 0.55;
  stroke: var(--border);
  stroke-width: 0.8;
  stroke-linejoin: round;
}

.city-group { cursor: default; }

.city-pin {
  fill: var(--rose);
  transition: fill 0.2s;
}
.city-group:hover .city-pin { fill: var(--accent); }

.city-label {
  font-family: 'Jost', sans-serif;
  font-size: 8px;
  font-weight: 400;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  fill: var(--muted);
  transition: fill 0.2s;
  pointer-events: none;
  user-select: none;
}
.city-group:hover .city-label { fill: var(--accent); }

.map-tooltip {
  position: absolute;
  background: rgba(253, 248, 244, 0.93);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 18px;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.15s;
  max-width: 240px;
  box-shadow: 0 4px 20px rgba(122, 92, 140, 0.08);
  z-index: 10;
}
.map-tooltip.visible { opacity: 1; }

.tooltip-city-name {
  font-family: 'Cormorant Garamond', serif;
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 5px;
}
.tooltip-caption-text {
  font-size: 0.82rem;
  color: var(--muted);
  line-height: 1.7;
  font-style: italic;
}

/* ── Footer ── */
footer {
  text-align: center;
  padding: 40px 24px;
  border-top: 1px solid var(--border);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  color: var(--muted);
}

/* ── Mobile ── */
@media (max-width: 640px) {
  .hero { flex-direction: column-reverse; gap: 40px; text-align: center; }
  .hero-text::before { margin: 0 auto 24px; }
  .bio { max-width: 100%; }
  .links { justify-content: center; }
  .social { justify-content: center; }
  .photo-blob { width: 170px; height: 200px; }
  .hero-text h1 { font-size: 2.4rem; }

  .nav-toggle { display: block; }
  .nav-links {
    display: none;
    position: absolute;
    top: 64px;
    left: 0; right: 0;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    gap: 0;
    padding: 8px 0;
  }
  .nav-links.open { display: flex; }
  .nav-links li a { display: block; padding: 14px 32px; }
}