/* ===================================================================
   寫真 · Celebrity Gallery — style
   Zero dependencies. Pure CSS. Premium gallery feel.
   =================================================================== */

/* ============ Design tokens ============ */
:root {
  --bg: #faf6f1;
  --bg-2: #f3eee5;
  --surface: #ffffff;
  --surface-2: #faf6ed;
  --surface-3: #eee7d8;
  --border: #e8dfcc;
  --border-soft: #f0e9da;
  --text: #1f1a14;
  --text-2: #5c5547;
  --text-3: #6e6557;
  --text-faint: #b5ac9b;
  --accent: #e85f4d;
  --accent-2: #d44a39;
  --accent-soft: rgba(232, 95, 77, 0.08);
  --accent-glow: rgba(232, 95, 77, 0.25);
  --success: #3a9d6f;
  --r-sm: 8px;
  --r-md: 12px;
  --r-lg: 16px;
  --r-xl: 20px;
  --r-pill: 999px;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.06);
  --shadow-lg: 0 12px 32px rgba(0,0,0,0.10);
  --shadow-xl: 0 24px 48px rgba(0,0,0,0.14);
  --transition: 200ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);
  --font-ui: -apple-system, BlinkMacSystemFont, "Inter", "Segoe UI",
             "PingFang TC", "PingFang SC", "Hiragino Sans", "Noto Sans CJK",
             "Microsoft YaHei", sans-serif;
  --font-mono: "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;

  /* Region colors */
  --clr-china:  #d94040;
  --clr-korea:  #4a8fd4;
  --clr-japan:  #e07b8a;
  --clr-taiwan: #4ca87c;
  --clr-usa:    #4a6fa5;
}

/* ============ Reset ============ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
[hidden] { display: none !important; }
html { font-size: 16px; }
html, body {
  font-family: var(--font-ui);
  color: var(--text);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
button { font-family: inherit; cursor: pointer; border: none; background: none; color: inherit; }
input, select { font-family: inherit; color: inherit; }
a { color: var(--accent); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--accent-2); }
ul, ol { padding-left: 1.25em; }

/* ============ Body ============ */
body {
  background: radial-gradient(ellipse at 50% 0%, #fdfaf3 0%, var(--bg) 55%);
  background-attachment: fixed;
}

/* ============ Layout ============ */
.app {
  max-width: 960px;
  margin: 0 auto;
  padding: 20px 20px 40px;
}

/* ============ Top bar ============ */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 0 20px;
}
.brand {
  font-weight: 700;
  font-size: 15px;
  color: var(--text);
  letter-spacing: -0.01em;
}
.brand:hover { color: var(--text); opacity: 0.7; }
.topbar-right {
  display: flex;
  align-items: center;
  gap: 12px;
}
.nav-link {
  font-size: 13px;
  color: var(--text-3);
  white-space: nowrap;
  transition: color var(--transition);
}
.nav-link:hover { color: var(--accent); }

/* ============ Lang switcher ============ */
.lang-switcher {
  appearance: none;
  -webkit-appearance: none;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-2);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  padding: 6px 28px 6px 10px;
  cursor: pointer;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6'%3E%3Cpath d='M0 0l5 6 5-6z' fill='%238a8275'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 8px center;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.lang-switcher:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.lang-switcher:hover { border-color: var(--accent); }

/* ============ Page title ============ */
.page-title {
  font-size: 34px;
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--text);
  text-align: center;
  margin-top: 4px;
}
.page-sub {
  font-size: 14px;
  color: var(--text-2);
  text-align: center;
  margin: 6px 0 24px;
  letter-spacing: -0.01em;
}

/* ============ Filter chips ============ */
.filters {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 20px;
}
.filter-chip {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 8px 16px;
  border-radius: var(--r-pill);
  border: 1px solid var(--border);
  background: var(--surface);
  font-size: 13px;
  font-weight: 500;
  color: var(--text-2);
  cursor: pointer;
  transition: all var(--transition);
  user-select: none;
  -webkit-user-select: none;
}
.filter-chip:hover {
  border-color: var(--accent);
  color: var(--accent);
}
.filter-chip.active {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
  box-shadow: 0 2px 8px var(--accent-glow);
}
.filter-chip:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* ============ Search bar ============ */
.search-bar {
  margin-bottom: 28px;
}
.search-bar input {
  width: 100%;
  max-width: 480px;
  display: block;
  margin: 0 auto;
  padding: 12px 16px 12px 42px;
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  font-size: 14px;
  background: var(--surface);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' fill='none' stroke='%238a8275' stroke-width='2' stroke-linecap='round' viewBox='0 0 24 24'%3E%3Ccircle cx='11' cy='11' r='8'/%3E%3Cpath d='M21 21l-4.35-4.35'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: 14px center;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.search-bar input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}
.search-bar input::placeholder {
  color: var(--text-faint);
}

/* ============ Celebrity grid ============ */
.celeb-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 20px;
}

/* ============ Celebrity card ============ */
.celeb-card {
  background: var(--surface);
  border-radius: var(--r-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition);
  will-change: transform;
}
.celeb-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}
.celeb-card:active {
  transform: scale(0.98);
}
.celeb-card:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.celeb-card-thumb {
  position: relative;
  overflow: hidden;
  aspect-ratio: 3 / 4;
  background: var(--bg-2);
}
.celeb-card-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 400ms ease;
}
.celeb-card:hover .celeb-card-thumb img {
  transform: scale(1.06);
}

.celeb-card-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(0,0,0,0.45) 0%, transparent 50%);
  opacity: 0;
  transition: opacity var(--transition);
  display: flex;
  align-items: flex-end;
  padding: 16px;
}
.celeb-card:hover .celeb-card-overlay {
  opacity: 1;
}

.celeb-card-overlay-text {
  color: #fff;
  font-size: 13px;
  font-weight: 600;
  text-shadow: 0 1px 4px rgba(0,0,0,0.3);
}

.celeb-card-info {
  padding: 14px 16px 16px;
}
.celeb-card-name {
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  letter-spacing: -0.01em;
  line-height: 1.3;
}
.celeb-card-name-en {
  font-size: 12px;
  color: var(--text-3);
  margin-top: 2px;
}
.celeb-card-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 10px;
  font-size: 11px;
  color: var(--text-3);
}

.region-badge {
  display: inline-flex;
  align-items: center;
  gap: 3px;
  padding: 2px 8px;
  border-radius: var(--r-pill);
  font-size: 11px;
  font-weight: 500;
}
.region-badge.china { background: rgba(217, 64, 64, 0.1); color: var(--clr-china); }
.region-badge.korea { background: rgba(74, 143, 212, 0.1); color: var(--clr-korea); }
.region-badge.japan { background: rgba(224, 123, 138, 0.1); color: var(--clr-japan); }
.region-badge.taiwan { background: rgba(76, 168, 124, 0.1); color: var(--clr-taiwan); }
.region-badge.usa { background: rgba(74, 111, 165, 0.1); color: var(--clr-usa); }

/* ============ Empty state ============ */
.empty-state {
  text-align: center;
  padding: 80px 20px;
  grid-column: 1 / -1;
}
.empty-state-icon {
  font-size: 48px;
  margin-bottom: 12px;
  opacity: 0.6;
}
.empty-state-title {
  font-size: 18px;
  font-weight: 600;
  color: var(--text-2);
  margin-bottom: 6px;
}
.empty-state-desc {
  font-size: 14px;
  color: var(--text-3);
}

/* ============ Detail overlay ============ */
.detail-overlay {
  position: fixed;
  inset: 0;
  z-index: 100;
  background: var(--bg);
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  animation: detailIn 250ms ease both;
}
@keyframes detailIn {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: translateY(0); }
}

.detail-panel {
  max-width: 960px;
  margin: 0 auto;
  padding: 20px 20px 60px;
}

.detail-header {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 28px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border);
}

.detail-back {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  align-self: flex-start;
  padding: 8px 16px;
  border-radius: var(--r-sm);
  font-size: 13px;
  font-weight: 500;
  color: var(--text-2);
  background: var(--surface);
  border: 1px solid var(--border);
  cursor: pointer;
  transition: all var(--transition);
}
.detail-back:hover {
  background: var(--surface-2);
  border-color: var(--accent);
  color: var(--accent);
}
.detail-back:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.detail-name {
  font-size: 28px;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text);
}
.detail-name-en {
  font-size: 14px;
  color: var(--text-3);
  margin-top: -4px;
}

.detail-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 13px;
  color: var(--text-2);
  margin-top: 4px;
}
.detail-meta-item {
  display: inline-flex;
  align-items: center;
  gap: 4px;
}
.detail-meta-label {
  color: var(--text-3);
  font-weight: 500;
}

.detail-bio {
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-2);
  margin-top: 12px;
  max-width: 640px;
}

.detail-section-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 6px;
}
.detail-section-title .photo-count {
  font-size: 12px;
  font-weight: 400;
  color: var(--text-3);
}

/* ============ Photo masonry grid ============ */
.detail-photos {
  columns: 3;
  column-gap: 12px;
}
.detail-photo-item {
  break-inside: avoid;
  margin-bottom: 12px;
  border-radius: var(--r-md);
  overflow: hidden;
  background: var(--bg-2);
  cursor: pointer;
  transition: transform 150ms ease, box-shadow 150ms ease;
  position: relative;
}
.detail-photo-item:hover {
  transform: scale(1.025);
  box-shadow: var(--shadow-md);
}
.detail-photo-item:active {
  transform: scale(0.98);
}
.detail-photo-item img {
  width: 100%;
  display: block;
  transition: opacity 400ms ease;
}
.detail-photo-item img.lazy-load {
  opacity: 0;
}
.detail-photo-item img.lazy-loaded {
  opacity: 1;
}

/* ============ Lightbox ============ */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 200;
  background: rgba(0, 0, 0, 0.96);
  display: flex;
  align-items: center;
  justify-content: center;
  animation: fadeIn 200ms ease;
  -webkit-backdrop-filter: blur(20px);
  backdrop-filter: blur(20px);
}
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.lightbox-img-wrap {
  display: flex;
  align-items: center;
  justify-content: center;
  max-width: 90vw;
  max-height: 85vh;
}
.lightbox-img {
  max-width: 90vw;
  max-height: 85vh;
  object-fit: contain;
  border-radius: 4px;
  box-shadow: 0 8px 40px rgba(0,0,0,0.4);
  transition: opacity 200ms ease;
}

.lightbox-close {
  position: absolute;
  top: 20px;
  right: 20px;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: rgba(255,255,255,0.10);
  color: #fff;
  font-size: 22px;
  cursor: pointer;
  transition: background 150ms;
  z-index: 10;
}
.lightbox-close:hover {
  background: rgba(255,255,255,0.22);
}

.lightbox-nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: rgba(255,255,255,0.10);
  color: #fff;
  font-size: 28px;
  cursor: pointer;
  transition: background 150ms;
  user-select: none;
}
.lightbox-nav:hover {
  background: rgba(255,255,255,0.25);
}
.lightbox-prev { left: 20px; }
.lightbox-next { right: 20px; }

.lightbox-counter {
  position: absolute;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  color: rgba(255,255,255,0.7);
  font-size: 13px;
  font-weight: 500;
  background: rgba(0,0,0,0.4);
  padding: 4px 14px;
  border-radius: var(--r-pill);
  pointer-events: none;
  font-variant-numeric: tabular-nums;
}

/* ============ Social links ============ */
.detail-social {
  display: flex;
  gap: 10px;
  margin-top: 24px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
}
.social-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border-radius: var(--r-sm);
  font-size: 13px;
  font-weight: 500;
  background: var(--surface-2);
  color: var(--text-2);
  border: 1px solid var(--border);
  transition: all var(--transition);
}
.social-link:hover {
  background: var(--surface);
  border-color: var(--accent);
  color: var(--accent);
}

/* ============ Info section ============ */
.info {
  margin-top: 60px;
  padding-top: 32px;
  border-top: 1px solid var(--border);
}
.info h2 {
  font-size: 18px;
  font-weight: 700;
  color: var(--text);
  margin: 28px 0 10px;
  letter-spacing: -0.02em;
}
.info h2:first-child { margin-top: 0; }
.info h3 {
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
  margin: 20px 0 6px;
  letter-spacing: -0.01em;
}
.info p {
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-2);
  margin-bottom: 8px;
}

/* ============ Footer ============ */
.site-footer {
  margin-top: 48px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
  text-align: center;
}
.site-footer-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 20px;
  font-size: 13px;
  color: var(--text-3);
}
.site-footer-row a {
  color: var(--text-3);
  font-size: 13px;
  transition: color var(--transition);
}
.site-footer-row a:hover { color: var(--accent); }
.sub {
  font-size: 11px;
  color: var(--text-faint);
  margin-top: 10px;
}

/* ============ Focus / A11y ============ */
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* ============ Skeleton loading ============ */
.skeleton {
  background: linear-gradient(90deg, var(--bg-2) 25%, var(--border-soft) 50%, var(--bg-2) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: var(--r-sm);
}
@keyframes shimmer {
  0%   { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* ============ Reduced motion ============ */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* ============ Responsive ============ */
@media (max-width: 768px) {
  .detail-photos {
    columns: 2;
    column-gap: 10px;
  }

  .detail-photo-item {
    margin-bottom: 10px;
  }

  .celeb-grid {
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 14px;
  }

  .page-title {
    font-size: 26px;
  }
}

@media (max-width: 480px) {
  .app {
    padding: 12px 16px 32px;
  }

  .page-title {
    font-size: 24px;
  }

  .page-sub {
    font-size: 13px;
    margin-bottom: 18px;
  }

  .filters {
    gap: 6px;
    margin-bottom: 16px;
  }

  .filter-chip {
    padding: 6px 12px;
    font-size: 12px;
  }

  .celeb-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
  }

  .celeb-card-info {
    padding: 10px 12px 12px;
  }

  .celeb-card-name {
    font-size: 14px;
  }

  .celeb-card-name-en {
    font-size: 11px;
  }

  .celeb-card-meta {
    font-size: 10px;
    gap: 6px;
  }

  .detail-photos {
    columns: 2;
    column-gap: 8px;
  }

  .detail-photo-item {
    margin-bottom: 8px;
  }

  .detail-name {
    font-size: 22px;
  }

  .detail-panel {
    padding: 16px 16px 48px;
  }

  .lightbox-nav {
    width: 40px;
    height: 40px;
    font-size: 24px;
  }

  .lightbox-prev { left: 8px; }
  .lightbox-next { right: 8px; }

  .lightbox-close {
    width: 38px;
    height: 38px;
    top: 12px;
    right: 12px;
    font-size: 20px;
  }

  .topbar-right {
    gap: 8px;
  }

  .lang-switcher {
    font-size: 12px;
    padding: 5px 24px 5px 8px;
  }
}