:root {
  --accent: #0080FF;
  --accent-rgb: 0, 128, 255;
  --bg-gradient-start: #1a1a2e;
  --bg-gradient-mid: #16213e;
  --bg-gradient-end: #0f3460;
  --glass-bg: rgba(255, 255, 255, 0.08);
  --glass-border: rgba(255, 255, 255, 0.18);
  --glass-highlight: rgba(255, 255, 255, 0.25);
  --text-primary: #ffffff;
  --text-secondary: rgba(255, 255, 255, 0.7);
  --shadow: 0 8px 32px rgba(0, 0, 0, 0.35);
  --radius: 24px;
  --radius-sm: 16px;
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
  min-height: 100vh;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--text-primary);
  background: linear-gradient(135deg, var(--bg-gradient-start), var(--bg-gradient-mid), var(--bg-gradient-end));
  background-attachment: fixed;
  overflow-x: hidden;
}

body::before, body::after {
  content: "";
  position: fixed;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.45;
  z-index: -1;
  pointer-events: none;
}

body::before {
  width: 600px;
  height: 600px;
  top: -200px;
  right: -200px;
  background: radial-gradient(circle, rgba(0,128,255,0.5), transparent 70%);
}

body::after {
  width: 500px;
  height: 500px;
  bottom: -150px;
  left: -150px;
  background: radial-gradient(circle, rgba(120,80,255,0.4), transparent 70%);
}

.container {
  max-width: 960px;
  margin: 0 auto;
  padding: 40px 20px 120px;
}

.site-header {
  text-align: center;
  margin-bottom: 36px;
}

.site-title {
  font-size: 2.4rem;
  font-weight: 700;
  letter-spacing: 2px;
  margin: 0 0 8px;
  text-shadow: 0 2px 16px rgba(0,0,0,0.3);
}

.site-subtitle {
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin: 0;
}

.glass-card {
  background: var(--glass-bg);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border: 1px solid var(--glass-border);
  border-top: 1px solid var(--glass-highlight);
  border-left: 1px solid var(--glass-highlight);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 28px;
}

.hero {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.hero-cover {
  width: 100%;
  max-width: 560px;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  border-radius: var(--radius-sm);
  box-shadow: 0 12px 40px rgba(0,0,0,0.35);
  margin-bottom: 24px;
  background: rgba(0,0,0,0.2);
}

.hero-title {
  font-size: 1.6rem;
  font-weight: 600;
  margin: 0 0 8px;
  line-height: 1.3;
}

.hero-up {
  font-size: 1rem;
  color: var(--text-secondary);
  margin-bottom: 24px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  justify-content: center;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: 999px;
  font-size: 1rem;
  font-weight: 600;
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease;
}

.btn:active {
  transform: scale(0.97);
}

.btn-primary {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 4px 18px rgba(var(--accent-rgb), 0.45);
}

.btn-primary:hover {
  box-shadow: 0 6px 24px rgba(var(--accent-rgb), 0.6);
}

.btn-secondary {
  background: rgba(255,255,255,0.12);
  color: var(--text-primary);
  border: 1px solid var(--glass-border);
}

.btn-secondary:hover {
  background: rgba(255,255,255,0.2);
}

.loading, .empty {
  text-align: center;
  color: var(--text-secondary);
  padding: 60px 20px;
}

.spinner {
  width: 40px;
  height: 40px;
  border: 3px solid rgba(255,255,255,0.2);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin: 0 auto 16px;
}

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

.db-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
  flex-wrap: wrap;
  gap: 12px;
}

.db-title {
  font-size: 1.4rem;
  font-weight: 600;
  margin: 0;
}

.db-count {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.song-list {
  display: grid;
  gap: 16px;
}

.song-card {
  display: flex;
  gap: 16px;
  background: var(--glass-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm);
  padding: 16px;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.song-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 32px rgba(0,0,0,0.3);
}

.song-thumb {
  width: 160px;
  min-width: 160px;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  border-radius: 12px;
  background: rgba(0,0,0,0.2);
}

.song-info {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.song-title {
  font-size: 1.1rem;
  font-weight: 600;
  margin: 0 0 8px;
  line-height: 1.3;
  overflow: hidden;
  text-overflow: ellipsis;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
}

.song-meta {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.song-reason {
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin-bottom: 12px;
  line-height: 1.4;
  overflow: hidden;
  text-overflow: ellipsis;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
}

.song-actions {
  display: flex;
  gap: 10px;
}

.song-actions .btn {
  padding: 8px 18px;
  font-size: 0.85rem;
}

.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 16px;
  margin-top: 28px;
}

.page-info {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.dock {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 12px;
  padding: 10px 16px;
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(24px) saturate(180%);
  -webkit-backdrop-filter: blur(24px) saturate(180%);
  border: 1px solid var(--glass-border);
  border-radius: 999px;
  box-shadow: 0 8px 32px rgba(0,0,0,0.35);
  z-index: 100;
}

.dock-item {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 52px;
  height: 52px;
  border-radius: 50%;
  color: var(--text-secondary);
  text-decoration: none;
  transition: all 0.2s ease;
  position: relative;
}

.dock-item:hover {
  color: var(--text-primary);
  background: rgba(255,255,255,0.12);
}

.dock-item.active {
  color: var(--accent);
  background: rgba(var(--accent-rgb), 0.18);
}

.dock-item svg {
  width: 26px;
  height: 26px;
}

.dock-label {
  position: absolute;
  top: -28px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 0.7rem;
  white-space: nowrap;
  opacity: 0;
  transition: opacity 0.2s ease;
  color: var(--text-secondary);
}

.dock-item:hover .dock-label {
  opacity: 1;
}

@media (max-width: 640px) {
  .site-title {
    font-size: 1.8rem;
  }

  .hero-cover {
    aspect-ratio: 16 / 11;
  }

  .song-card {
    flex-direction: column;
  }

  .song-thumb {
    width: 100%;
    max-height: 180px;
  }
}