/* ═══════════════════════════════════════════════════
   ZILING CHINESE DANCE  —  Warm earth tone stylesheet
   ═══════════════════════════════════════════════════ */

/* ── TOKENS ── */
:root {
  --cream:      #FAF6F0;
  --sand:       #EFE4D2;
  --tan:        #D4B896;
  --terracotta: #C4732A;
  --sienna:     #9B5520;
  --umber:      #6B3A1F;
  --dark:       #2A1408;
  --gold:       #C8963E;

  --text:       #2C1810;
  --muted:      #7A5035;

  --serif:   'Cormorant Garamond', 'Noto Serif SC', Georgia, serif;
  --zh:      'Zhi Mang Xing', 'Noto Serif SC', serif;
  --sans:    'Raleway', 'Noto Sans SC', system-ui, sans-serif;

  --nav-h:   70px;
  --maxw:    1180px;
  --pad:     96px;
}

/* ── RESET ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  background: var(--cream);
  color: var(--text);
  font-family: var(--sans);
  font-weight: 300;
  line-height: 1.85;
  overflow-x: hidden;
}
img { display: block; width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }

.container {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 36px;
}

/* ── FADE-IN ── */
.fade-section {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.75s ease, transform 0.75s ease;
}
.fade-section.visible { opacity: 1; transform: none; }

/* ══════════════════════════════════════
   NAV
══════════════════════════════════════ */
#nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--nav-h);
  z-index: 900;
  transition: background 0.4s, box-shadow 0.4s;
}
#nav.scrolled {
  background: rgba(250,246,240,0.95);
  backdrop-filter: blur(10px);
  box-shadow: 0 1px 24px rgba(44,20,8,0.08);
}

.nav-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 36px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo { display: flex; flex-direction: column; line-height: 1.2; }
.logo-en {
  font-family: var(--serif);
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--umber);
  letter-spacing: 0.04em;
}
.logo-zh {
  font-family: var(--zh);
  font-size: 0.75rem;
  color: var(--muted);
  letter-spacing: 0.18em;
}

.nav-links { display: flex; align-items: center; gap: 28px; }
.nav-links a {
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--umber);
  position: relative;
  transition: color 0.2s;
}
.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -2px; left: 0;
  width: 0; height: 1px;
  background: var(--terracotta);
  transition: width 0.3s;
}
.nav-links a:hover { color: var(--terracotta); }
.nav-links a:hover::after { width: 100%; }

#lang-toggle {
  font-size: 0.76rem;
  letter-spacing: 0.08em;
  color: var(--cream);
  background: var(--terracotta);
  padding: 5px 15px;
  border-radius: 20px;
  transition: background 0.2s;
}
#lang-toggle:hover { background: var(--sienna); }

.hamburger { display: none; flex-direction: column; gap: 5px; padding: 4px; }
.hamburger span {
  display: block; width: 22px; height: 2px;
  background: var(--umber); border-radius: 2px;
  transition: transform 0.3s, opacity 0.3s;
}
.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ══════════════════════════════════════
   HERO
══════════════════════════════════════ */
#hero {
  height: 100vh;
  min-height: 600px;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.hero-bg {
  position: absolute; inset: 0;
  background:
    radial-gradient(ellipse at 18% 55%, rgba(196,115,42,0.14) 0%, transparent 55%),
    radial-gradient(ellipse at 82% 20%, rgba(200,150,62,0.10) 0%, transparent 50%),
    linear-gradient(155deg, #FAF6F0 0%, #EFE4D2 55%, #E5D0B0 100%);
}

/* Subtle ink-wash SVG texture overlay */
.hero-bg::after {
  content: '';
  position: absolute; inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='60' height='60'%3E%3Ccircle cx='30' cy='30' r='1' fill='rgba(107,58,31,0.04)'/%3E%3C/svg%3E");
  background-size: 60px 60px;
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: 0 24px;
}

.hero-label {
  font-size: 0.7rem;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--terracotta);
  margin-bottom: 22px;
  opacity: 0.85;
}

.hero-zh {
  font-family: var(--zh);
  font-size: clamp(3.2rem, 11vw, 7.5rem);
  font-weight: 300;
  letter-spacing: 0.22em;
  color: var(--umber);
  line-height: 1;
  margin-bottom: 10px;
}

.hero-en {
  font-family: var(--serif);
  font-size: clamp(1rem, 2.5vw, 1.65rem);
  font-weight: 400;
  font-style: italic;
  color: var(--muted);
  letter-spacing: 0.06em;
  margin-bottom: 36px;
}

.hero-rule {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  color: var(--gold);
  margin-bottom: 18px;
}
.hero-rule span {
  display: block; width: 56px; height: 1px;
  background: linear-gradient(90deg, transparent, var(--gold));
}
.hero-rule span:last-child {
  background: linear-gradient(90deg, var(--gold), transparent);
}
.hero-rule svg { flex-shrink: 0; }

.hero-tagline {
  font-family: var(--serif);
  font-size: clamp(0.95rem, 1.8vw, 1.2rem);
  color: var(--muted);
  letter-spacing: 0.07em;
  margin-bottom: 44px;
}

.hero-cta {
  display: inline-block;
  padding: 11px 38px;
  border: 1.5px solid var(--terracotta);
  color: var(--terracotta);
  font-size: 0.75rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  border-radius: 28px;
  transition: background 0.3s, color 0.3s;
}
.hero-cta:hover { background: var(--terracotta); color: var(--cream); }

.hero-arrow {
  position: absolute;
  bottom: 30px; left: 50%;
  transform: translateX(-50%);
  color: var(--tan);
  animation: bob 2.2s ease-in-out infinite;
}
@keyframes bob {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50%       { transform: translateX(-50%) translateY(7px); }
}

/* ══════════════════════════════════════
   SECTION SHARED
══════════════════════════════════════ */
.section { padding: var(--pad) 0; }
.section-alt { background: var(--sand); }

.section-header { text-align: center; margin-bottom: 54px; }
.section-label {
  display: inline-block;
  font-size: 0.7rem;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--terracotta);
  margin-bottom: 12px;
}
.section-label::before,
.section-label::after { content: '—'; margin: 0 10px; opacity: 0.4; }
.section-title {
  font-family: var(--serif);
  font-size: clamp(1.45rem, 3vw, 2.1rem);
  font-weight: 400;
  color: var(--umber);
  letter-spacing: 0.02em;
}

/* ══════════════════════════════════════
   ABOUT
══════════════════════════════════════ */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: 72px;
  align-items: center;
}
.about-body {
  font-size: 1.02rem;
  line-height: 2.05;
  color: var(--text);
  font-weight: 300;
}
.about-stats { display: flex; flex-direction: column; gap: 20px; }
.stat-card {
  padding: 22px 28px;
  border-left: 3px solid var(--gold);
  background: rgba(200,150,62,0.06);
}
.stat-val {
  display: block;
  font-family: var(--serif);
  font-size: 2.4rem;
  font-weight: 600;
  color: var(--terracotta);
  line-height: 1;
  margin-bottom: 5px;
}
.stat-val-sm {
  display: block;
  font-family: var(--serif);
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--terracotta);
  line-height: 1.25;
  margin-bottom: 5px;
}
.stat-lbl {
  font-size: 0.68rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
}

/* ══════════════════════════════════════
   INSTRUCTOR
══════════════════════════════════════ */
.instr-grid {
  display: grid;
  grid-template-columns: 360px 1fr;
  gap: 72px;
  align-items: center;
}
.instr-photo-wrap { position: relative; }
.instr-photo-frame {
  position: relative;
  aspect-ratio: 3/4;
  border-radius: 3px;
  overflow: hidden;
  background: var(--sand);
}
.instr-photo-frame img { width: 100%; height: 100%; object-fit: cover; }
.photo-ph {
  width: 100%; height: 100%;
  display: flex; align-items: center; justify-content: center;
  background: linear-gradient(140deg, var(--sand) 0%, var(--tan) 100%);
  color: var(--umber);
}
.frame-deco {
  position: absolute; inset: 14px;
  border: 1px solid rgba(200,150,62,0.28);
  pointer-events: none;
}
.instr-name {
  font-family: var(--zh);
  font-size: clamp(1.45rem, 2.8vw, 1.95rem);
  font-weight: 400;
  color: var(--umber);
  letter-spacing: 0.07em;
  margin-bottom: 18px;
}
.instr-rule {
  width: 48px; height: 2px;
  background: var(--gold);
  margin-bottom: 22px;
}
.bio-para {
  font-size: 0.98rem;
  line-height: 1.95;
  color: var(--text);
  font-weight: 300;
  margin-bottom: 14px;
}
.bio-para:last-child { margin-bottom: 0; }

.bio-block { margin-bottom: 20px; }
.bio-block:last-child { margin-bottom: 0; }
.bio-heading {
  font-size: 0.68rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--terracotta);
  margin-bottom: 8px;
  font-weight: 400;
}
.bio-list {
  padding-left: 14px;
  list-style: none;
}
.bio-list li {
  font-size: 0.9rem;
  line-height: 1.75;
  color: var(--text);
  position: relative;
  padding-left: 12px;
}
.bio-list li::before {
  content: '·';
  position: absolute;
  left: 0;
  color: var(--gold);
  font-size: 1rem;
  line-height: 1.75;
}

/* ══════════════════════════════════════
   GALLERY — bento mosaic grid
══════════════════════════════════════ */
#gallery-grid { min-height: 160px; }

#gallery-grid.grid-active {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-auto-rows: 240px;
  gap: 6px;
  grid-auto-flow: dense;
}

/* Pattern classes assigned by JS based on index % 5 */
.gallery-item        { position: relative; overflow: hidden; cursor: pointer; border-radius: 3px; }
.gallery-item.large  { grid-column: span 2; grid-row: span 2; }
.gallery-item.wide   { grid-column: span 2; }

.gallery-item img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform 0.65s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  display: block;
}
.gallery-item:hover img { transform: scale(1.07); }

/* Hover caption overlay */
.gallery-caption {
  position: absolute;
  bottom: 0; left: 0; right: 0;
  padding: 32px 14px 12px;
  background: linear-gradient(transparent, rgba(28,10,4,0.62));
  color: rgba(250,246,240,0.92);
  font-family: var(--sans);
  font-size: 0.74rem;
  letter-spacing: 0.1em;
  font-weight: 300;
  opacity: 0;
  transition: opacity 0.35s ease;
  pointer-events: none;
}
.gallery-item:hover .gallery-caption { opacity: 1; }

/* View icon on hover */
.gallery-item::before {
  content: '';
  position: absolute;
  top: 12px; right: 12px;
  width: 32px; height: 32px;
  border-radius: 50%;
  background: rgba(250,246,240,0.2);
  backdrop-filter: blur(4px);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='rgba(250,246,240,0.9)' width='16' height='16'%3E%3Cpath d='M12 4.5C7 4.5 2.73 7.61 1 12c1.73 4.39 6 7.5 11 7.5s9.27-3.11 11-7.5c-1.73-4.39-6-7.5-11-7.5zM12 17c-2.76 0-5-2.24-5-5s2.24-5 5-5 5 2.24 5 5-2.24 5-5 5zm0-8c-1.66 0-3 1.34-3 3s1.34 3 3 3 3-1.34 3-3-1.34-3-3-3z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: center;
  opacity: 0;
  transition: opacity 0.35s ease;
  z-index: 1;
}
.gallery-item:hover::before { opacity: 1; }

.gallery-empty {
  text-align: center;
  padding: 56px 24px;
  color: var(--muted);
  font-size: 0.88rem;
  line-height: 1.8;
  border: 1.5px dashed var(--tan);
  border-radius: 4px;
}
.gallery-empty code {
  background: rgba(155,85,32,0.1);
  padding: 1px 5px;
  border-radius: 3px;
  font-family: monospace;
  font-size: 0.85em;
}

/* ── LIGHTBOX ── */
#lightbox {
  display: none;
  position: fixed; inset: 0;
  background: rgba(24,10,4,0.93);
  z-index: 1000;
  align-items: center;
  justify-content: center;
}
#lightbox.open { display: flex; }
#lb-img {
  max-width: 90vw;
  max-height: 88vh;
  width: auto;
  object-fit: contain;
  border-radius: 2px;
}
.lb-btn {
  position: absolute;
  color: rgba(250,246,240,0.8);
  transition: color 0.2s;
  background: none; border: none;
  cursor: pointer;
}
.lb-btn:hover { color: var(--cream); }
#lb-close { top: 22px; right: 28px; font-size: 1.6rem; line-height: 1; }
#lb-prev  { left: 16px;  top: 50%; transform: translateY(-50%); font-size: 3rem; padding: 16px; }
#lb-next  { right: 16px; top: 50%; transform: translateY(-50%); font-size: 3rem; padding: 16px; }
#lb-caption {
  position: absolute;
  bottom: 22px; left: 50%;
  transform: translateX(-50%);
  color: rgba(250,246,240,0.6);
  font-size: 0.82rem;
  letter-spacing: 0.07em;
  white-space: nowrap;
}

/* ══════════════════════════════════════
   VIDEOS
══════════════════════════════════════ */
#video-grid { display: flex; flex-direction: column; gap: 32px; }

/* Regular — 2×2 equal grid */
.video-grid-regular {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 6px;
}

.video-embed {
  position: relative;
  aspect-ratio: 16 / 9;
  border-radius: 4px;
  overflow: hidden;
  background: var(--dark);
}
.video-embed iframe {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  border: 0;
}

/* Shorts — centered portrait strip with card styling */
.video-grid-shorts {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  justify-content: center;
}
.video-grid-shorts .video-card { width: 215px; flex-shrink: 0; }

.video-embed-short {
  position: relative;
  aspect-ratio: 9 / 16;
  border-radius: 14px;
  overflow: hidden;
  background: var(--dark);
  box-shadow: 0 10px 32px rgba(28,10,4,0.2);
}
.video-embed-short iframe {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  border: 0;
}

.shorts-label {
  text-align: center;
  font-size: 0.68rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 8px;
}

.video-title {
  margin-top: 8px;
  font-size: 0.8rem;
  color: var(--muted);
  text-align: center;
  letter-spacing: 0.04em;
}
.video-empty {
  text-align: center;
  padding: 56px 24px;
  color: var(--muted);
  font-size: 0.88rem;
  border: 1.5px dashed var(--tan);
  border-radius: 4px;
}

/* ══════════════════════════════════════
   SCHEDULE
══════════════════════════════════════ */
.schedule-wrap {
  max-width: 780px;
  margin: 0 auto;
}
.schedule-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.94rem;
}
.schedule-table thead th {
  padding: 10px 18px;
  text-align: left;
  font-size: 0.66rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--muted);
  border-bottom: 1px solid var(--tan);
}
.schedule-table tbody tr {
  border-bottom: 1px solid rgba(212,184,150,0.35);
  transition: background 0.18s;
}
.schedule-table tbody tr:hover { background: rgba(200,150,62,0.06); }
.schedule-table td { padding: 17px 18px; vertical-align: middle; }
.td-loc  { font-family: var(--serif); font-weight: 600; color: var(--umber); }
.td-day  { color: var(--text); }
.td-time { color: var(--muted); white-space: nowrap; font-variant-numeric: tabular-nums; }
.sched-tag { display: inline-block; margin-left: 18px; padding: 1px 8px; border-radius: 20px; font-size: 0.72rem; font-family: var(--sans); letter-spacing: 0.04em; background: rgba(196,115,42,0.12); color: var(--sienna); border: 1px solid rgba(196,115,42,0.28); vertical-align: middle; }
.badge {
  display: inline-block;
  padding: 3px 11px;
  border-radius: 11px;
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}
.level-beg { background: rgba(196,115,42,0.12); color: var(--sienna); }
.level-int { background: rgba(107,58,31,0.12);  color: var(--umber);  }
.level-all { background: rgba(200,150,62,0.15); color: #9A6E20;       }
.sched-note {
  margin-top: 18px;
  font-size: 0.78rem;
  color: var(--muted);
  text-align: center;
}

/* ══════════════════════════════════════
   CONTACT
══════════════════════════════════════ */
.contact-handles {
  display: flex;
  flex-wrap: wrap;
  gap: 32px;
  margin-bottom: 44px;
  padding-bottom: 36px;
  border-bottom: 1px solid var(--tan);
}
.contact-handle-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
}
.c-icon {
  width: 44px; height: 44px;
  background: rgba(196,115,42,0.1);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  color: var(--terracotta);
  flex-shrink: 0;
}
.c-icon--rednote {
  background: rgba(255,36,66,0.1);
  color: #E0192A;
}
.c-detail { display: flex; flex-direction: column; gap: 3px; }
.c-label {
  font-size: 0.67rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--muted);
}
.c-value {
  display: block;
  font-size: 1rem;
  color: var(--text);
}

.loc-header {
  font-size: 0.7rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 20px;
}

.loc-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  align-items: start;
}

.loc-card {
  border: 1px solid var(--tan);
  border-radius: 4px;
  overflow: hidden;
  background: var(--cream);
}
.loc-card--tbd {
  border-style: dashed;
  opacity: 0.75;
}

.loc-pin {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 18px 18px 0;
  color: var(--terracotta);
}
.loc-name {
  font-family: var(--serif);
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--umber);
  padding: 6px 18px 0;
}
.loc-addr {
  font-size: 0.88rem;
  line-height: 1.7;
  color: var(--text);
  padding: 8px 18px 0;
}
.loc-addr-tbd {
  display: block;
  font-size: 0.82rem;
  color: var(--muted);
  font-style: italic;
  padding: 8px 18px 0;
}
.loc-hours {
  font-size: 0.76rem;
  color: var(--muted);
  padding: 6px 18px 16px;
  letter-spacing: 0.02em;
}
.loc-map {
  border-top: 1px solid var(--tan);
  overflow: hidden;
}
.loc-map iframe { display: block; }

/* ══════════════════════════════════════
   FOOTER
══════════════════════════════════════ */
footer {
  background: var(--dark);
  padding: 60px 36px 48px;
  text-align: center;
}
.footer-zh {
  font-family: var(--zh);
  font-size: 1.85rem;
  font-weight: 300;
  color: var(--cream);
  letter-spacing: 0.22em;
  margin-bottom: 5px;
}
.footer-en {
  font-family: var(--serif);
  font-size: 0.88rem;
  font-style: italic;
  color: var(--tan);
  letter-spacing: 0.07em;
  margin-bottom: 26px;
}
.footer-rule {
  width: 38px; height: 1px;
  background: var(--gold);
  margin: 0 auto 22px;
}
.footer-copy, .footer-tag {
  font-size: 0.76rem;
  color: rgba(212,184,150,0.45);
  letter-spacing: 0.04em;
}
.footer-tag { margin-top: 5px; color: rgba(212,184,150,0.28); }

/* ══════════════════════════════════════
   RESPONSIVE
══════════════════════════════════════ */
@media (max-width: 1024px) {
  .about-grid { grid-template-columns: 1fr; gap: 48px; }
  .about-stats { flex-direction: row; flex-wrap: wrap; }
  .stat-card   { flex: 1; min-width: 140px; }
  .instr-grid  { grid-template-columns: 300px 1fr; gap: 48px; }
  #gallery-grid.grid-active { grid-template-columns: repeat(2, 1fr); grid-auto-rows: 200px; }
  .loc-cards { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  :root { --pad: 64px; }

  .hamburger { display: flex; }
  .nav-links {
    display: none;
    position: fixed;
    top: var(--nav-h); left: 0; right: 0;
    background: rgba(250,246,240,0.97);
    backdrop-filter: blur(10px);
    flex-direction: column;
    align-items: center;
    padding: 32px 24px;
    gap: 22px;
    box-shadow: 0 6px 28px rgba(44,20,8,0.1);
  }
  .nav-links.open { display: flex; }
  .nav-links a { font-size: 0.92rem; }

  .instr-grid { grid-template-columns: 1fr; gap: 40px; }
  .instr-photo-wrap { max-width: 280px; margin: 0 auto; }

  .loc-cards { grid-template-columns: 1fr; }

  .schedule-table { font-size: 0.84rem; }
  .schedule-table th, .schedule-table td { padding: 11px 12px; }
}

@media (max-width: 520px) {
  .container { padding: 0 20px; }
  #gallery-grid.grid-active { grid-template-columns: 1fr; grid-auto-rows: 260px; }
  #gallery-grid.grid-active .gallery-item.large,
  #gallery-grid.grid-active .gallery-item.wide { grid-column: span 1; grid-row: span 1; }
  .gallery-filters { flex-wrap: wrap; }
  .hero-zh { letter-spacing: 0.12em; }
}