:root {
  --bg0: #12151c;
  --bg1: #1a1f2b;
  --bg2: #242b3a;
  --text: #e8ecf4;
  --muted: #9aa3b5;
  --accent: #7eb8ff;
  --line: rgba(255, 255, 255, 0.08);
  --radius: 14px;
  --shadow: 0 12px 40px rgba(0, 0, 0, 0.35);
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--text);
  background:
    radial-gradient(1200px 600px at 10% -10%, #2a3550 0%, transparent 55%),
    radial-gradient(900px 500px at 100% 0%, #1e2a24 0%, transparent 50%),
    var(--bg0);
}

.top {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 1rem;
  padding: 2rem clamp(1rem, 4vw, 3rem) 1rem;
}

.eyebrow {
  margin: 0;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  font-size: 0.75rem;
  color: var(--accent);
}

.brand h1 {
  margin: 0.25rem 0 0;
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 650;
}

.updated {
  margin: 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.tabs {
  display: flex;
  gap: 0.5rem;
  padding: 0 clamp(1rem, 4vw, 3rem) 1rem;
  flex-wrap: wrap;
}

.tabs button {
  border: 1px solid var(--line);
  background: transparent;
  color: var(--muted);
  padding: 0.55rem 1rem;
  border-radius: 999px;
  cursor: pointer;
  transition: 0.2s ease;
}

.tabs button.active,
.tabs button:hover {
  color: var(--text);
  background: var(--bg2);
  border-color: transparent;
}

main {
  padding: 0 clamp(1rem, 4vw, 3rem) 3rem;
}

.cat-block + .cat-block {
  margin-top: 2rem;
}

.cat-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.6rem 1rem;
  margin: 0 0 0.9rem;
}

.cat-block h2,
#albumTitle {
  margin: 0 0 0.9rem;
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--muted);
}

.cat-head h2 {
  margin: 0;
}

.year-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.year-tabs button {
  border: 1px solid var(--line);
  background: transparent;
  color: var(--muted);
  padding: 0.28rem 0.75rem;
  border-radius: 999px;
  cursor: pointer;
  font-size: 0.85rem;
  transition: 0.2s ease;
}

.year-tabs button.active,
.year-tabs button:hover {
  color: var(--text);
  background: var(--bg2);
  border-color: transparent;
}

.album-grid,
.photo-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: 0.9rem;
}

.album-card,
.photo-card {
  border: 0;
  padding: 0;
  text-align: left;
  background: var(--bg1);
  border-radius: var(--radius);
  overflow: hidden;
  cursor: pointer;
  box-shadow: var(--shadow);
  color: inherit;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.album-card:hover,
.photo-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 16px 44px rgba(0, 0, 0, 0.45);
}

.album-card img,
.photo-card img {
  display: block;
  width: 100%;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  background: var(--bg2);
}

.album-card .meta,
.photo-card .meta {
  padding: 0.7rem 0.8rem 0.85rem;
}

.album-card .meta strong,
.photo-card .meta strong {
  display: block;
  font-size: 0.92rem;
}

.album-card .meta span,
.photo-card .meta span {
  color: var(--muted);
  font-size: 0.8rem;
}

.back {
  border: 0;
  background: transparent;
  color: var(--accent);
  cursor: pointer;
  padding: 0;
  margin-bottom: 1rem;
  font-size: 0.95rem;
}

.hidden {
  display: none !important;
}

.lightbox {
  position: fixed;
  inset: 0;
  background: rgba(8, 10, 16, 0.88);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 2rem;
  z-index: 50;
}

.lightbox img {
  max-width: min(92vw, 900px);
  max-height: 80vh;
  object-fit: contain;
  border-radius: 10px;
  box-shadow: var(--shadow);
}

.lightbox p {
  margin: 0.8rem 0 0;
  color: var(--muted);
}

.lightbox-close {
  position: absolute;
  top: 1rem;
  right: 1.2rem;
  border: 0;
  background: transparent;
  color: var(--text);
  font-size: 2rem;
  cursor: pointer;
  line-height: 1;
}

.empty {
  color: var(--muted);
  font-size: 0.92rem;
}