/* 天思库视觉主题 v3 — 双模式对比度重设计
   夜晚: 深空+星星,顶栏深色玻璃+亮白字(高对比)
   日光: 白底黑字,顶栏纯白+近黑字,星星隐去 */

/* ===== 星空暗夜(默认) ===== */
:root {
  --bg: #0c1528;
  /* Canvas 星野由 cosmos.js 负责；CSS 提供无脚本时的深空底色。 */
  --bg-gradient: radial-gradient(ellipse 70% 50% at 15% 15%, rgba(60,100,220,.10), transparent 70%),
               radial-gradient(ellipse 50% 40% at 85% 75%, rgba(120,80,220,.08), transparent 70%),
               linear-gradient(180deg, #0e1a33 0%, #0c1528 30%, #0a1225 60%, #081020 100%);
  --topbar-bg: rgba(10,17,33,.92);
  --topbar-tx: #f0f5ff;
  --panel: rgba(18,30,56,.92);
  --panel2: rgba(24,40,72,.85);
  --line: rgba(50,80,140,.35);
  --tx: #e8effc;
  --dim: #94a8cc;
  --acc: #74b0ff;
  --acc2: #9d8ffb;
  --ok: #4fd494;
  --warn: #f0b45e;
  --err: #ef6d6d;
  --shadow: 0 8px 32px rgba(0,0,0,.35);
  --glow: 0 0 60px rgba(90,156,245,.06);
  --card-bg: rgba(18,30,56,.88);
  --card-border: rgba(60,100,180,.2);
  --card-hover: rgba(90,156,245,.08);
  --input-bg: rgba(22,38,68,.9);
  --btn-bg: rgba(30,50,90,.7);
  --star-color: rgba(200,220,255,.85);
  --nebula-1: rgba(60,100,220,.18);
  --nebula-2: rgba(120,80,220,.12);
  --nebula-3: rgba(30,70,180,.2);
}

/* ===== 日光模式: 白底黑字 ===== */
:root[data-theme="light"] {
  --bg: #f4f7fc;
  --bg-gradient: radial-gradient(ellipse 70% 50% at 15% 15%, rgba(180,200,255,.12), transparent 70%),
               radial-gradient(ellipse 50% 40% at 85% 75%, rgba(200,180,255,.08), transparent 70%),
               linear-gradient(180deg, #eef3fb 0%, #f4f7fc 35%, #f8fafd 70%, #ffffff 100%);
  --topbar-bg: rgba(255,255,255,.95);
  --topbar-tx: #16233f;
  --panel: rgba(255,255,255,.92);
  --panel2: rgba(240,244,252,.92);
  --line: rgba(150,175,215,.3);
  --tx: #131e36;
  --dim: #56709e;
  --acc: #2a6af0;
  --acc2: #6c4cf0;
  --ok: #2ca868;
  --warn: #c4842c;
  --err: #c43c3c;
  --shadow: 0 8px 32px rgba(30,60,140,.1);
  --glow: 0 0 60px rgba(42,106,240,.06);
  --card-bg: rgba(255,255,255,.85);
  --card-border: rgba(140,170,220,.25);
  --card-hover: rgba(42,106,240,.06);
  --input-bg: rgba(255,255,255,.95);
  --btn-bg: rgba(240,245,255,.9);
  --star-color: transparent;
  --nebula-1: rgba(180,200,255,.15);
  --nebula-2: rgba(200,180,255,.1);
  --nebula-3: transparent;
}

/* ===== 全局背景 ===== */
/* 渐变放 html,body 透明 — body::before(z-index:-1) 的星空才不会被 body 背景盖住 */
html {
  background: var(--bg-gradient);
}
body {
  margin: 0;
  background: transparent;
  color: var(--tx);
  font-family: 'Inter', 'SF Pro', 'Microsoft YaHei', system-ui, sans-serif;
  -webkit-font-smoothing: antialiased;
  transition: background .4s, color .4s;
}

/* Non-repeating animated space is drawn by cosmos.js on non-tree pages. */
body::before,body::after{content:none;display:none}

/* ===== 主题切换按钮 ===== */
.theme-toggle {
  pointer-events: auto;
  position: relative;
  width: 56px;
  height: 30px;
  border-radius: 15px;
  background: var(--btn-bg);
  border: 1.5px solid var(--line);
  cursor: pointer;
  transition: all .3s;
  flex-shrink: 0;
}
.theme-toggle:hover {
  border-color: var(--acc);
  box-shadow: 0 0 16px rgba(90,156,245,.2);
}
.theme-toggle .thumb {
  position: absolute;
  top: 3px;
  left: 3px;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--acc), var(--acc2));
  transition: all .3s cubic-bezier(.4,0,.2,1);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  box-shadow: 0 2px 12px rgba(90,156,245,.3);
}
:root[data-theme="light"] .theme-toggle .thumb {
  left: 29px;
  background: linear-gradient(135deg, var(--warn), #f0c060);
}
.theme-toggle .icon-dark, .theme-toggle .icon-light {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  font-size: 11px;
  transition: opacity .3s;
}
.theme-toggle .icon-dark { right: 7px; opacity: 1; }
.theme-toggle .icon-light { left: 7px; opacity: 0; }
:root[data-theme="light"] .theme-toggle .icon-dark { opacity: 0; }
:root[data-theme="light"] .theme-toggle .icon-light { opacity: 1; }

/* ===== 卡片玻璃效果 ===== */
.glass-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 14px;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: var(--shadow);
  transition: all .25s;
}
.glass-card:hover {
  border-color: rgba(90,156,245,.3);
  box-shadow: var(--shadow), var(--glow);
}

/* ===== 脚本骨架九字段(共享:knowledge/tree3d 详情弹窗) ===== */
.skel-sec { margin-top: 18px; }
.skel-sec .sec-title {
  font-size: .95rem; font-weight: 700; color: var(--tx);
  margin-bottom: 8px;
}
.skel-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.sk-card {
  background: var(--panel2);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 10px 14px;
}
.sk-card:nth-child(odd)  { border-left: 3px solid var(--acc); }
.sk-card:nth-child(even) { border-left: 3px solid var(--acc2); }
.sk-label {
  font-size: .72rem; color: var(--dim);
  letter-spacing: .08em; margin-bottom: 4px;
}
.sk-value {
  font-size: .92rem; color: var(--tx);
  line-height: 1.55; word-break: break-word;
}
/* 窄屏: 九字段单列,避免两列挤压 */
@media (max-width: 640px) {
  .skel-grid { grid-template-columns: 1fr; }
  .sk-card { padding: 8px 12px; }
}

/* ===== 视频证据失效占位(共享) ===== */
.video-hero.video-broken {
  display: flex; align-items: center; justify-content: center;
  min-height: 200px; background: var(--panel2);
  border: 1px dashed var(--line); border-radius: 12px;
  color: var(--dim); font-size: .95rem;
}
.video-hero.video-broken::after { content: '⚠ 视频证据缺失或已被清理'; }