/* 留白皮肤 v2 · 纯色编辑风（无毛玻璃）
   借鉴 GlassMusic：呼吸间距、圆角、分组导航、卡片 hover */

[data-theme="serenity"] {
  --kb-sticky-bg: #f5f5f4;
  --bg-1: #fafaf9;
  --bg-2: #f5f5f4;
  --bg-3: #ffffff;
  --panel: #ffffff;
  --panel2: #ffffff;
  --sidebar-bg: #ffffff;
  --line: rgba(28, 25, 23, 0.09);
  --text: #1c1917;
  --muted: rgba(28, 25, 23, 0.52);
  --accent: #44403c;
  --accent-2: #78716c;
  --accent-soft: rgba(68, 64, 60, 0.08);
  --green: #0d9488;
  --gold: #b45309;
  --danger: #dc2626;
  --input-bg: #fafaf9;
  --hover-bg: rgba(28, 25, 23, 0.04);
  --chip-bg: #f5f5f4;
  --chip-fg: #44403c;
  --shadow: 0 4px 24px rgba(28, 25, 23, 0.06);
  --shadow-sm: 0 1px 3px rgba(28, 25, 23, 0.05);
  --radius: 12px;
  --font: "Noto Sans SC", system-ui, sans-serif;
  --font-display: "Noto Sans SC", sans-serif;
  --glass: none;
  --brand-gradient: none;
  --link: #0d9488;
  --btn-primary-bg: #292524;
  --btn-primary-fg: #fafaf9;
  --graph-node: #e7e5e4;
  --graph-stroke: #44403c;
  --graph-edge: rgba(28, 25, 23, 0.12);
}

[data-theme="serenity"] body {
  background: linear-gradient(160deg, var(--bg-1) 0%, var(--bg-2) 45%, #eceae6 100%);
}

/* 取消毛玻璃类在留白下的效果 */
[data-theme="serenity"] .glass-card,
[data-theme="serenity"] .glass-container,
[data-theme="serenity"] .glass-nav,
[data-theme="serenity"] .glass-shell {
  backdrop-filter: none !important;
  -webkit-backdrop-filter: none !important;
}

[data-theme="serenity"] .sidebar,
[data-theme="serenity"] .topbar,
[data-theme="serenity"] .chat-panel {
  backdrop-filter: none !important;
  -webkit-backdrop-filter: none !important;
}

/* 外框：纯色卡片容器（对应 glass 的 station-frame 呼吸感，但无 blur） */
[data-theme="serenity"] .station-frame {
  padding: 20px 28px 24px;
  box-sizing: border-box;
}

[data-theme="serenity"] .app {
  border-radius: 20px;
  overflow: hidden;
  background: var(--panel);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

[data-theme="serenity"] .sidebar {
  padding: 16px 12px;
  border-right: 1px solid var(--line);
  background: #fcfcfb;
}

[data-theme="serenity"] .sidebar-inner,
[data-theme="serenity"] .chat-inner {
  padding: 4px;
  gap: 4px;
}

[data-theme="serenity"] .sidebar-inner.glass-card,
[data-theme="serenity"] .chat-inner.glass-card {
  background: transparent;
  border: none;
  box-shadow: none;
  border-radius: 0;
}

[data-theme="serenity"] .brand {
  padding: 4px 6px 18px;
  margin-bottom: 4px;
  border-bottom: 1px solid var(--line);
}

[data-theme="serenity"] .brand h1 {
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--text);
  background: none;
  -webkit-text-fill-color: unset;
}

[data-theme="serenity"] .brand-icon {
  color: var(--accent);
  filter: none;
}

[data-theme="serenity"] .nav-section-title {
  color: var(--muted);
}

[data-theme="serenity"] .nav-indicator {
  background: rgba(28, 25, 23, 0.06);
  border-radius: 8px;
}

[data-theme="serenity"] .nav-item {
  padding: 8px 10px;
  border-radius: 8px;
  font-size: 0.88rem;
  color: var(--muted);
  gap: 10px;
}

[data-theme="serenity"] .nav-item:hover {
  background: var(--hover-bg);
  color: var(--text);
}

[data-theme="serenity"] .nav-item.active {
  background: var(--hover-bg);
  color: var(--text);
  font-weight: 500;
  box-shadow: none !important;
}

[data-theme="serenity"] .nav-item.active iconify-icon {
  opacity: 1;
  color: var(--accent);
}

/* 顶栏：实心浮动条 */
[data-theme="serenity"] .topbar.glass-nav {
  margin: 14px 18px 8px;
  padding: 10px 14px;
  border: 1px solid var(--line);
  border-bottom: none;
  border-radius: 12px;
  background: #ffffff;
  box-shadow: var(--shadow-sm);
}

[data-theme="serenity"] .main .content {
  padding: 12px 28px 28px;
}

[data-theme="serenity"] .search-box {
  padding: 8px 12px;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: var(--input-bg);
  transition: border-color 0.2s, box-shadow 0.2s;
}

[data-theme="serenity"] .search-box.focused {
  border-color: rgba(28, 25, 23, 0.22);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

[data-theme="serenity"] .pill {
  border-radius: 10px;
  background: var(--chip-bg);
  border: 1px solid var(--line);
}

[data-theme="serenity"] .section-head {
  margin-bottom: 24px;
}

[data-theme="serenity"] .section-head h2 {
  font-size: 1.45rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}

[data-theme="serenity"] .section-head p {
  font-size: 0.88rem;
  line-height: 1.6;
  margin-top: 8px;
}

[data-theme="serenity"] .kb-grid,
[data-theme="serenity"] #company-grid,
[data-theme="serenity"] #app-grid,
[data-theme="serenity"] #career-grid,
[data-theme="serenity"] #pm-grid {
  gap: 18px;
  grid-template-columns: repeat(auto-fill, minmax(252px, 1fr));
}

[data-theme="serenity"] .kb-card,
[data-theme="serenity"] .info-card,
[data-theme="serenity"] .practice-box,
[data-theme="serenity"] .news-block,
[data-theme="serenity"] .note-card {
  padding: 18px 20px;
  border-radius: 14px;
  background: #ffffff;
  border: 1px solid var(--line);
  box-shadow: var(--shadow-sm);
  transition: transform 0.22s ease, box-shadow 0.22s ease, border-color 0.22s ease;
}

[data-theme="serenity"] .kb-card:hover {
  transform: translateY(-2px);
  border-color: rgba(28, 25, 23, 0.14);
  box-shadow: 0 8px 28px rgba(28, 25, 23, 0.08);
}

[data-theme="serenity"] .stat-mini,
[data-theme="serenity"] .theme-panel {
  border-radius: 12px;
  background: #fafaf9;
}

[data-theme="serenity"] .chat-panel {
  border-left: 1px solid var(--line);
  background: #fcfcfb;
  padding: 12px;
}

[data-theme="serenity"] .chat-head {
  border-bottom: 1px solid var(--line);
}

[data-theme="serenity"] .chat-foot:not(.chat-compose) {
  margin: 6px 0 0;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #ffffff;
}

[data-theme="serenity"] .chat-foot.chat-compose {
  margin: 0;
  padding: 6px 12px 10px;
  border: none;
  border-radius: 0;
  background: transparent;
}

[data-theme="serenity"] .chat-compose-bar {
  border: 1px solid var(--line);
  background: var(--input-bg);
}

[data-theme="serenity"] #chat-input {
  border: none;
  border-radius: 0;
  background: transparent;
}

[data-theme="serenity"] .chat-bubble {
  border-radius: 12px;
}

[data-theme="serenity"] .chat-bubble.agent {
  background: #f5f5f4;
  border: 1px solid var(--line);
}

[data-theme="serenity"] .chat-bubble.user {
  background: #fafaf9;
  border: 1px solid var(--line);
}

[data-theme="serenity"] .ind-tab {
  padding: 8px 14px;
  border-radius: 10px;
  background: var(--input-bg);
  border: 1px solid var(--line);
  font-size: 0.82rem;
  transition: background 0.2s, color 0.2s;
}

[data-theme="serenity"] .ind-tab.active {
  background: var(--text);
  color: #fafaf9;
  border-color: var(--text);
}

[data-theme="serenity"] .btn.primary {
  border-radius: 10px;
  font-weight: 500;
}

[data-theme="serenity"] .btn.primary.glass-button {
  background: var(--btn-primary-bg);
  color: var(--btn-primary-fg);
  border: none;
  box-shadow: var(--shadow-sm);
}

[data-theme="serenity"] .icon-btn {
  border-radius: 10px;
  border: 1px solid var(--line);
  background: var(--input-bg);
}

[data-theme="serenity"] .kb-peek-card,
[data-theme="serenity"] .read-summary-card,
[data-theme="serenity"] .read-article-card {
  backdrop-filter: none !important;
  -webkit-backdrop-filter: none !important;
  background: #ffffff;
  border-radius: 16px;
  box-shadow: 0 12px 40px rgba(28, 25, 23, 0.1);
}

[data-theme="serenity"] .kb-card-head {
  background: linear-gradient(135deg, #fafaf9, #ffffff);
}

[data-theme="serenity"] .theme-swatch.active {
  border-color: var(--accent);
  box-shadow: 0 0 0 1px var(--accent);
}

[data-theme="serenity"] .font-field select {
  border-radius: 8px;
}