/* ── Foldie - Glassmorphism (light) ──────────────────────────── */

:root {
  --bg: #f0f2f5;
  --glass-bg: rgba(255, 255, 255, 0.7);
  --glass-border: rgba(255, 255, 255, 0.5);
  --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
  --glass-blur: blur(20px);
  --glass-bg-hover: rgba(255, 255, 255, 0.85);
  --glass-bg-active: rgba(255, 255, 255, 0.6);
  --text: #1a1a2e;
  --text-muted: #6b7280;
  --text-dim: #9ca3af;
  --accent: #7c3aed;
  --accent-light: #a78bfa;
  --accent-glow: rgba(124, 58, 237, 0.1);
  --green: #059669;
  --green-glow: rgba(5, 150, 105, 0.12);
  --red: #dc2626;
  --red-glow: rgba(220, 38, 38, 0.12);
  --radius: 20px;
  --radius-sm: 12px;
  --radius-xs: 8px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  font-family: 'Inter', -apple-system, 'PingFang SC', 'Microsoft YaHei', sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

/* ── Glass base ───────────────────────────────────────────────── */
.glass {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-shadow);
}

/* ── Header ────────────────────────────────────────────────────── */
header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 24px;
  max-width: 480px;
  margin: 0 auto;
}

header h1 {
  font-size: 1.5rem;
  font-weight: 800;
  letter-spacing: -0.5px;
  color: var(--accent);
}

header h1 a {
  color: var(--accent);
  text-decoration: none;
}

.header-right {
  display: flex;
  align-items: center;
  gap: 10px;
}

.nav-link {
  color: var(--text-muted);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.85rem;
  transition: all 0.2s;
  padding: 5px 10px;
  border-radius: 8px;
}

.nav-link:hover {
  color: var(--accent);
  background: var(--accent-glow);
}

.counter {
  color: var(--text-dim);
  font-size: 0.8rem;
  font-weight: 500;
  padding: 4px 12px;
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: 20px;
}

/* ── Card Area ────────────────────────────────────────────────── */
#cardArea {
  max-width: 460px;
  margin: 0 auto;
  padding: 16px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 24px;
}

#cardContainer {
  width: 100%;
}

.card {
  border-radius: var(--radius);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  width: 100%;
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-shadow);
}

.card-header {
  padding: 18px 22px 12px;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 10px;
}

.card-header h2 {
  font-size: 1.05rem;
  font-weight: 600;
  line-height: 1.35;
  flex: 1;
  color: var(--text);
}

.pdb-badge {
  background: var(--accent);
  color: white;
  font-size: 0.7rem;
  font-weight: 700;
  padding: 3px 9px;
  border-radius: 6px;
  font-family: 'Courier New', monospace;
  letter-spacing: 0.8px;
  white-space: nowrap;
}

/* ── NGL Container ─────────────────────────────────────────────── */
.ngl-container {
  width: 100%;
  height: 380px;
  position: relative;
  background: #eef1f7;
}

.ngl-overlay {
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: rgba(238, 241, 247, 0.95);
  z-index: 10;
}

.ngl-overlay p {
  color: var(--text-dim);
  font-size: 0.85rem;
  margin-top: 14px;
}

/* ── Card Footer ───────────────────────────────────────────────── */
.card-footer {
  padding: 12px 22px 18px;
}

.card-desc {
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.45;
  margin-bottom: 10px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.card-meta {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.tag {
  background: rgba(107, 114, 128, 0.08);
  color: var(--text-muted);
  padding: 3px 10px;
  border-radius: 12px;
  font-size: 0.72rem;
  font-weight: 500;
}

/* ── Spinner ───────────────────────────────────────────────────── */
.spinner {
  width: 36px;
  height: 36px;
  border: 2px solid rgba(107, 114, 128, 0.15);
  border-top: 2px solid var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin: 0 auto;
}

@keyframes spin { to { transform: rotate(360deg); } }

/* ── Exhausted ─────────────────────────────────────────────────── */
.exhausted-card {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 480px;
}

.exhausted-content {
  text-align: center;
  padding: 40px 24px;
}

.exhausted-icon { font-size: 3.5rem; margin-bottom: 12px; }

.exhausted-content h2 {
  font-size: 1.25rem;
  margin-bottom: 8px;
  font-weight: 600;
}

.exhausted-content p {
  color: var(--text-muted);
  margin-bottom: 20px;
  line-height: 1.5;
  font-size: 0.9rem;
}

/* ── Action Buttons ────────────────────────────────────────────── */
.actions {
  display: flex;
  gap: 28px;
  width: 100%;
  justify-content: center;
  padding: 0 16px;
}

.action-btn {
  width: 76px;
  height: 76px;
  border-radius: 50%;
  border: 1px solid var(--glass-border);
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2px;
  transition: all 0.25s;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
  box-shadow: 0 4px 16px rgba(0,0,0,0.06);
}

.action-icon { font-size: 1.6rem; line-height: 1; }
.action-label { font-size: 0.72rem; font-weight: 600; color: var(--text-dim); }

.dislike-btn:hover {
  border-color: var(--red);
  background: var(--red-glow);
  box-shadow: 0 0 20px var(--red-glow), 0 4px 16px rgba(0,0,0,0.08);
  transform: translateY(-2px);
}

.like-btn:hover {
  border-color: var(--green);
  background: var(--green-glow);
  box-shadow: 0 0 20px var(--green-glow), 0 4px 16px rgba(0,0,0,0.08);
  transform: translateY(-2px);
}

.dislike-btn:active { transform: scale(0.92); }
.like-btn:active { transform: scale(0.92); }

.dislike-btn.voted {
  border-color: var(--red);
  background: var(--red-glow);
  transform: scale(0.9);
}

.like-btn.voted {
  border-color: var(--green);
  background: var(--green-glow);
  transform: scale(0.9);
}

/* ── Buttons ───────────────────────────────────────────────────── */
.btn {
  display: inline-block;
  padding: 10px 22px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.85rem;
  text-decoration: none;
  border: 1px solid var(--glass-border);
  cursor: pointer;
  transition: all 0.2s;
  font-family: inherit;
}

.btn-primary {
  background: var(--accent);
  color: white;
  border: none;
}

.btn-primary:hover { background: #6d28d9; }

.btn-secondary {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  color: var(--text-muted);
  margin-left: 8px;
}

.btn-secondary:hover { background: var(--glass-bg-hover); color: var(--text); }

/* ── Leaderboard Page ─────────────────────────────────────────── */
.leaderboard-page {
  max-width: 680px;
  margin: 0 auto;
  padding: 20px 16px;
}

.lb-controls {
  margin-bottom: 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.metric-tabs, .period-tabs {
  display: flex;
  gap: 4px;
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border-radius: var(--radius-sm);
  padding: 4px;
  border: 1px solid var(--glass-border);
}

.tab {
  flex: 1;
  padding: 8px 16px;
  border: none;
  background: transparent;
  color: var(--text-dim);
  font-family: inherit;
  font-size: 0.82rem;
  font-weight: 500;
  border-radius: var(--radius-xs);
  cursor: pointer;
  transition: all 0.2s;
}

.tab.active {
  background: var(--accent);
  color: white;
}

.tab:hover:not(.active) { color: var(--text); }

.lb-loading {
  text-align: center;
  padding: 60px 20px;
  color: var(--text-dim);
}

.lb-empty {
  text-align: center;
  padding: 60px 20px;
}

.lb-empty h2 { margin-bottom: 8px; }
.lb-empty p { color: var(--text-muted); margin-bottom: 20px; }

.lb-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.lb-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  transition: all 0.2s;
}

.lb-item:hover {
  border-color: var(--accent-light);
  background: var(--glass-bg-hover);
}

.lb-item.top-three {
  border-color: rgba(124, 58, 237, 0.2);
}

.lb-rank {
  font-size: 1.2rem;
  min-width: 34px;
  text-align: center;
  font-weight: 700;
}

.lb-info {
  flex: 1;
  min-width: 0;
}

.lb-title {
  font-weight: 600;
  font-size: 0.85rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  margin-bottom: 4px;
}

.lb-meta {
  display: flex;
  gap: 4px;
  flex-wrap: wrap;
}

.pdb-badge-sm {
  background: var(--accent);
  color: white;
  font-size: 0.62rem;
  font-weight: 700;
  padding: 2px 6px;
  border-radius: 4px;
  font-family: 'Courier New', monospace;
}

.lb-stats {
  display: flex;
  gap: 4px;
  align-items: center;
  margin-left: auto;
}

.lb-stat {
  display: flex;
  align-items: center;
  gap: 3px;
  padding: 3px 9px;
  background: rgba(107, 114, 128, 0.06);
  border-radius: 8px;
  font-size: 0.78rem;
}

.lb-stat-icon { font-size: 0.7rem; }

.lb-stat-val {
  font-weight: 600;
  color: var(--text);
}

.lb-stat.like-pct .lb-stat-val { color: var(--green); }

/* ── Responsive ───────────────────────────────────────────────── */
@media (max-width: 520px) {
  header { padding: 12px 16px; }
  .ngl-container { height: 300px; }
  .action-btn { width: 64px; height: 64px; }
  .action-icon { font-size: 1.3rem; }
  .card-header h2 { font-size: 0.95rem; }
  .lb-item { padding: 10px 12px; }
  .lb-stats { gap: 2px; }
}