/**
 * 全站主题令牌 — 由 html.site-theme-* 切换
 * 组件样式通过 var(--st-*) 引用（见 home.css / admin-shell.css）
 */

html[class*="site-theme-"]::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -2;
  pointer-events: none;
  background: var(--st-pattern, none);
  opacity: var(--st-pattern-opacity, 0);
}

html[class*="site-theme-"]::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background: var(--st-overlay, none);
  opacity: var(--st-overlay-opacity, 0);
  animation: var(--st-overlay-animation, none);
}

@keyframes st-fluid-drift {
  0% { transform: translate(0, 0) scale(1); }
  100% { transform: translate(3%, -2%) scale(1.06); }
}

@media (prefers-reduced-motion: reduce) {
  html.site-theme-fluid::after {
    --st-overlay-animation: none !important;
  }
}

html[class*="site-theme-"],
html[class*="site-theme-"] body {
  background: var(--st-canvas) fixed;
  background-size: cover;
  color: var(--st-text);
}

/* —— 1. 玻璃拟态 —— */
html.site-theme-glass {
  --st-canvas: linear-gradient(140deg, #071018 0%, #0d1528 38%, #101a30 72%, #0c1424 100%);
  --st-text: #e8ecf4;
  --st-text-muted: #94a3b8;
  --st-accent: #7dd3fc;
  --st-accent-soft: rgba(125, 211, 252, 0.14);
  --st-card-bg: rgba(15, 23, 42, 0.42);
  --st-card-border: rgba(255, 255, 255, 0.12);
  --st-surface-bg: rgba(255, 255, 255, 0.06);
  --st-surface-border: rgba(255, 255, 255, 0.1);
  --st-glass-blur: 24px;
  --st-glass-frost: blur(24px) saturate(1.42);
  --st-glass-frost-md: blur(18px) saturate(1.38);
  --st-glass-frost-sm: blur(14px) saturate(1.34);
  --st-glass-frost-xs: blur(12px) saturate(1.32);
  --st-glass-inset: inset 0 1px 0 rgba(255, 255, 255, 0.08);
  --st-shadow: 0 24px 52px rgba(2, 8, 24, 0.55);
  --st-shadow-sm: 0 16px 36px rgba(2, 8, 24, 0.32);
  --st-use-blur: 1;
  --st-pattern: none;
  --st-pattern-opacity: 0;
  --st-admin-sidebar: rgba(15, 23, 42, 0.42);
  --st-admin-shell: rgba(15, 23, 42, 0.38);
  --st-admin-panel: rgba(15, 23, 42, 0.45);
}

html.site-theme-glass.theme-light {
  --st-canvas: linear-gradient(125deg, #e9e5f8 0%, #dbe8e0 24%, #d9ebfb 48%, #e8e4f6 74%, #efe8f5 100%);
  --st-text: #111827;
  --st-text-muted: #64748b;
  --st-accent: #2563eb;
  --st-accent-soft: rgba(37, 99, 235, 0.12);
  --st-card-bg: rgba(255, 255, 255, 0.12);
  --st-card-border: rgba(255, 255, 255, 0.3);
  --st-surface-bg: rgba(255, 255, 255, 0.14);
  --st-surface-border: rgba(255, 255, 255, 0.22);
  --st-glass-blur: 40px;
  --st-glass-frost: blur(40px) saturate(1.52);
  --st-glass-frost-md: blur(28px) saturate(1.46);
  --st-glass-frost-sm: blur(18px) saturate(1.42);
  --st-glass-frost-xs: blur(14px) saturate(1.38);
  --st-glass-inset: inset 0 1px 0 rgba(255, 255, 255, 0.24);
  --st-shadow: 0 22px 46px rgba(80, 100, 150, 0.1);
  --st-shadow-sm: 0 14px 32px rgba(80, 100, 140, 0.08);
  --st-admin-sidebar: rgba(255, 255, 255, 0.14);
  --st-admin-shell: rgba(255, 255, 255, 0.11);
  --st-admin-panel: rgba(255, 255, 255, 0.12);
}

/* —— 2. 深色模式 #121212 —— */
html.site-theme-dark {
  --st-canvas: #121212;
  --st-text: #e8eaed;
  --st-text-muted: #9aa0a6;
  --st-accent: #8ab4f8;
  --st-accent-soft: rgba(138, 180, 248, 0.16);
  --st-card-bg: #1e1e1e;
  --st-card-border: #2d2d2d;
  --st-surface-bg: #252525;
  --st-surface-border: #333333;
  --st-glass-blur: 0;
  --st-glass-frost: none;
  --st-glass-frost-md: none;
  --st-glass-frost-sm: none;
  --st-glass-frost-xs: none;
  --st-glass-inset: inset 0 1px 0 rgba(255, 255, 255, 0.06);
  --st-shadow: 0 20px 40px rgba(0, 0, 0, 0.45);
  --st-shadow-sm: 0 12px 28px rgba(0, 0, 0, 0.35);
  --st-use-blur: 0;
  --st-pattern: radial-gradient(circle at 50% 0%, rgba(138, 180, 248, 0.08) 0%, transparent 55%);
  --st-pattern-opacity: 1;
  --st-admin-sidebar: #181818;
  --st-admin-shell: #1a1a1a;
  --st-admin-panel: #1e1e1e;
}

/* —— 3. 网格与点阵 —— */
html.site-theme-grid {
  --st-canvas: #0c1018;
  --st-text: #e2e8f0;
  --st-text-muted: #94a3b8;
  --st-accent: #60a5fa;
  --st-accent-soft: rgba(96, 165, 250, 0.15);
  --st-card-bg: rgba(22, 28, 40, 0.88);
  --st-card-border: rgba(148, 163, 184, 0.18);
  --st-surface-bg: rgba(30, 41, 59, 0.55);
  --st-surface-border: rgba(148, 163, 184, 0.14);
  --st-glass-blur: 12px;
  --st-glass-frost: blur(12px) saturate(1.2);
  --st-glass-frost-md: blur(10px) saturate(1.15);
  --st-glass-frost-sm: blur(8px) saturate(1.1);
  --st-glass-frost-xs: blur(6px);
  --st-glass-inset: inset 0 1px 0 rgba(255, 255, 255, 0.07);
  --st-shadow: 0 20px 44px rgba(0, 0, 0, 0.4);
  --st-shadow-sm: 0 12px 30px rgba(0, 0, 0, 0.28);
  --st-use-blur: 1;
  --st-pattern:
    linear-gradient(rgba(148, 163, 184, 0.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(148, 163, 184, 0.07) 1px, transparent 1px),
    radial-gradient(circle, rgba(148, 163, 184, 0.12) 1px, transparent 1px);
  --st-pattern-opacity: 1;
  --st-admin-sidebar: rgba(16, 20, 30, 0.92);
  --st-admin-shell: rgba(18, 24, 36, 0.9);
  --st-admin-panel: rgba(22, 28, 40, 0.92);
}

html.site-theme-grid::before {
  background-size: 24px 24px, 24px 24px, 16px 16px;
  background-position: 0 0, 0 0, 8px 8px;
}

html.site-theme-grid.theme-light {
  --st-canvas: #f4f6fa;
  --st-text: #0f172a;
  --st-text-muted: #64748b;
  --st-accent: #2563eb;
  --st-accent-soft: rgba(37, 99, 235, 0.1);
  --st-card-bg: rgba(255, 255, 255, 0.92);
  --st-card-border: rgba(148, 163, 184, 0.22);
  --st-surface-bg: rgba(248, 250, 252, 0.9);
  --st-surface-border: rgba(148, 163, 184, 0.2);
  --st-shadow: 0 16px 36px rgba(15, 23, 42, 0.08);
  --st-shadow-sm: 0 10px 24px rgba(15, 23, 42, 0.06);
  --st-pattern:
    linear-gradient(rgba(100, 116, 139, 0.09) 1px, transparent 1px),
    linear-gradient(90deg, rgba(100, 116, 139, 0.09) 1px, transparent 1px),
    radial-gradient(circle, rgba(100, 116, 139, 0.14) 1px, transparent 1px);
  --st-admin-sidebar: rgba(255, 255, 255, 0.94);
  --st-admin-shell: rgba(255, 255, 255, 0.9);
  --st-admin-panel: rgba(255, 255, 255, 0.95);
}

/* —— 4. 高级渐变 —— */
html.site-theme-gradient {
  --st-canvas: linear-gradient(145deg, #151a24 0%, #1c2433 35%, #1a2230 65%, #141b28 100%);
  --st-text: #e8ecf4;
  --st-text-muted: #94a3b8;
  --st-accent: #93c5fd;
  --st-accent-soft: rgba(147, 197, 253, 0.14);
  --st-card-bg: rgba(28, 36, 50, 0.72);
  --st-card-border: rgba(148, 163, 184, 0.16);
  --st-surface-bg: rgba(36, 48, 68, 0.45);
  --st-surface-border: rgba(148, 163, 184, 0.12);
  --st-glass-blur: 20px;
  --st-glass-frost: blur(20px) saturate(1.25);
  --st-glass-frost-md: blur(16px) saturate(1.2);
  --st-glass-frost-sm: blur(12px);
  --st-glass-frost-xs: blur(10px);
  --st-glass-inset: inset 0 1px 0 rgba(255, 255, 255, 0.07);
  --st-shadow: 0 22px 48px rgba(8, 12, 24, 0.42);
  --st-shadow-sm: 0 14px 32px rgba(8, 12, 24, 0.3);
  --st-use-blur: 1;
  --st-pattern: none;
  --st-pattern-opacity: 0;
  --st-admin-sidebar: rgba(24, 32, 46, 0.75);
  --st-admin-shell: rgba(26, 34, 48, 0.7);
  --st-admin-panel: rgba(28, 36, 50, 0.78);
}

html.site-theme-gradient.theme-light {
  --st-canvas: linear-gradient(145deg, #e8ecf4 0%, #dfe6f0 40%, #e5eaf2 70%, #eceff5 100%);
  --st-text: #1e293b;
  --st-text-muted: #64748b;
  --st-accent: #3b82f6;
  --st-accent-soft: rgba(59, 130, 246, 0.12);
  --st-card-bg: rgba(255, 255, 255, 0.65);
  --st-card-border: rgba(148, 163, 184, 0.2);
  --st-surface-bg: rgba(255, 255, 255, 0.5);
  --st-surface-border: rgba(148, 163, 184, 0.18);
  --st-shadow: 0 18px 40px rgba(71, 85, 105, 0.1);
  --st-shadow-sm: 0 12px 28px rgba(71, 85, 105, 0.08);
  --st-admin-sidebar: rgba(255, 255, 255, 0.72);
  --st-admin-shell: rgba(255, 255, 255, 0.68);
  --st-admin-panel: rgba(255, 255, 255, 0.75);
}

/* —— 5. 3D 炫彩流体 —— */
html.site-theme-fluid {
  --st-canvas: #0a0c12;
  --st-text: #f1f5f9;
  --st-text-muted: #a1a8b8;
  --st-accent: #a78bfa;
  --st-accent-soft: rgba(167, 139, 250, 0.18);
  --st-card-bg: rgba(18, 22, 36, 0.55);
  --st-card-border: rgba(255, 255, 255, 0.1);
  --st-surface-bg: rgba(255, 255, 255, 0.06);
  --st-surface-border: rgba(255, 255, 255, 0.1);
  --st-glass-blur: 28px;
  --st-glass-frost: blur(28px) saturate(1.5);
  --st-glass-frost-md: blur(22px) saturate(1.45);
  --st-glass-frost-sm: blur(16px) saturate(1.4);
  --st-glass-frost-xs: blur(12px);
  --st-glass-inset: inset 0 1px 0 rgba(255, 255, 255, 0.1);
  --st-shadow: 0 28px 56px rgba(4, 6, 20, 0.5);
  --st-shadow-sm: 0 16px 36px rgba(4, 6, 20, 0.38);
  --st-use-blur: 1;
  --st-pattern: none;
  --st-pattern-opacity: 0;
  --st-overlay:
    radial-gradient(ellipse 55% 45% at 15% 25%, rgba(99, 102, 241, 0.42), transparent 55%),
    radial-gradient(ellipse 50% 40% at 85% 70%, rgba(56, 189, 248, 0.35), transparent 50%),
    radial-gradient(ellipse 45% 38% at 55% 15%, rgba(244, 114, 182, 0.22), transparent 48%),
    radial-gradient(ellipse 40% 35% at 30% 80%, rgba(52, 211, 153, 0.18), transparent 45%);
  --st-overlay-opacity: 1;
  --st-overlay-animation: st-fluid-drift 18s ease-in-out infinite alternate;
  --st-admin-sidebar: rgba(14, 18, 32, 0.58);
  --st-admin-shell: rgba(16, 20, 34, 0.52);
  --st-admin-panel: rgba(18, 22, 36, 0.58);
}

html.site-theme-fluid.theme-light {
  --st-canvas: linear-gradient(160deg, #f0f4ff 0%, #faf5ff 50%, #f0fdfa 100%);
  --st-text: #1e1b4b;
  --st-text-muted: #64748b;
  --st-accent: #6366f1;
  --st-accent-soft: rgba(99, 102, 241, 0.12);
  --st-card-bg: rgba(255, 255, 255, 0.45);
  --st-card-border: rgba(255, 255, 255, 0.35);
  --st-overlay:
    radial-gradient(ellipse 55% 45% at 20% 30%, rgba(129, 140, 248, 0.35), transparent 55%),
    radial-gradient(ellipse 50% 40% at 80% 65%, rgba(56, 189, 248, 0.28), transparent 50%),
    radial-gradient(ellipse 45% 38% at 50% 10%, rgba(244, 114, 182, 0.2), transparent 48%);
  --st-admin-sidebar: rgba(255, 255, 255, 0.42);
  --st-admin-shell: rgba(255, 255, 255, 0.38);
  --st-admin-panel: rgba(255, 255, 255, 0.48);
}

/* —— 6. 低饱和纯色 —— */
html.site-theme-muted {
  --st-canvas: #1a1d21;
  --st-text: #e5e7eb;
  --st-text-muted: #9ca3af;
  --st-accent: #6b9bd1;
  --st-accent-soft: rgba(107, 155, 209, 0.15);
  --st-card-bg: #24282e;
  --st-card-border: #343a42;
  --st-surface-bg: #2c3138;
  --st-surface-border: #3d4450;
  --st-glass-blur: 0;
  --st-glass-frost: none;
  --st-glass-frost-md: none;
  --st-glass-frost-sm: none;
  --st-glass-frost-xs: none;
  --st-glass-inset: none;
  --st-shadow:
    0 1px 2px rgba(0, 0, 0, 0.2),
    0 8px 24px rgba(0, 0, 0, 0.28),
    0 20px 40px rgba(0, 0, 0, 0.18);
  --st-shadow-sm:
    0 1px 2px rgba(0, 0, 0, 0.15),
    0 6px 16px rgba(0, 0, 0, 0.22);
  --st-use-blur: 0;
  --st-pattern: none;
  --st-pattern-opacity: 0;
  --st-admin-sidebar: #22262c;
  --st-admin-shell: #1e2227;
  --st-admin-panel: #24282e;
}

html.site-theme-muted.theme-light {
  --st-canvas: #f0f2f5;
  --st-text: #1f2937;
  --st-text-muted: #6b7280;
  --st-accent: #4b7bb5;
  --st-accent-soft: rgba(75, 123, 181, 0.1);
  --st-card-bg: #ffffff;
  --st-card-border: #e5e7eb;
  --st-surface-bg: #f9fafb;
  --st-surface-border: #e5e7eb;
  --st-shadow:
    0 1px 2px rgba(15, 23, 42, 0.04),
    0 6px 20px rgba(15, 23, 42, 0.06),
    0 16px 40px rgba(15, 23, 42, 0.05);
  --st-shadow-sm:
    0 1px 2px rgba(15, 23, 42, 0.04),
    0 4px 14px rgba(15, 23, 42, 0.06);
  --st-admin-sidebar: #ffffff;
  --st-admin-shell: #ffffff;
  --st-admin-panel: #ffffff;
}

/* 无模糊主题：关闭 backdrop-filter（由组件类配合） */
html.site-theme-dark .card,
html.site-theme-dark .category,
html.site-theme-muted .card,
html.site-theme-muted .category,
html.site-theme-dark .admin-shell-card,
html.site-theme-muted .admin-shell-card {
  -webkit-backdrop-filter: none !important;
  backdrop-filter: none !important;
}

.theme-toggle--locked {
  opacity: 0.85;
  cursor: default;
}

/* 设置页主题预览 */
.theme-picker {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 10px;
  margin-top: 8px;
}

.theme-picker__item {
  position: relative;
  margin: 0;
  cursor: pointer;
}

.theme-picker__item input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.theme-picker__card {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 10px;
  border-radius: 12px;
  border: 2px solid rgba(148, 163, 184, 0.25);
  background: rgba(15, 23, 42, 0.4);
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
  min-height: 100px;
}

.theme-picker__item input:checked + .theme-picker__card {
  border-color: #3b82f6;
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.25);
}

.theme-picker__swatch {
  height: 44px;
  border-radius: 8px;
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.theme-picker__swatch--glass {
  background: linear-gradient(135deg, rgba(56, 189, 248, 0.35), rgba(99, 102, 241, 0.25)),
    linear-gradient(140deg, #0d1528, #101a30);
}

.theme-picker__swatch--dark {
  background: linear-gradient(180deg, #1e1e1e, #121212);
}

.theme-picker__swatch--grid {
  background-color: #0c1018;
  background-image:
    linear-gradient(rgba(148, 163, 184, 0.2) 1px, transparent 1px),
    linear-gradient(90deg, rgba(148, 163, 184, 0.2) 1px, transparent 1px);
  background-size: 10px 10px;
}

.theme-picker__swatch--gradient {
  background: linear-gradient(145deg, #dfe6f0, #1c2433);
}

.theme-picker__swatch--fluid {
  background:
    radial-gradient(circle at 30% 30%, rgba(167, 139, 250, 0.7), transparent 45%),
    radial-gradient(circle at 70% 70%, rgba(56, 189, 248, 0.6), transparent 45%),
    #0a0c12;
}

.theme-picker__swatch--muted {
  background: linear-gradient(180deg, #ffffff, #f0f2f5);
  box-shadow: 0 4px 12px rgba(15, 23, 42, 0.12);
}

.theme-picker__label {
  font-size: 12px;
  font-weight: 600;
  color: #e5e7eb;
}

.theme-picker__desc {
  font-size: 10px;
  line-height: 1.4;
  color: #94a3b8;
}

html.theme-light .theme-picker__card {
  background: rgba(255, 255, 255, 0.7);
  border-color: #e2e8f0;
}

html.theme-light .theme-picker__label {
  color: #0f172a;
}

html.theme-light .theme-picker__desc {
  color: #64748b;
}