/* ═══════════════════════════════════════════════════════════════════
   知资札记 - 全局样式
   主色：#162A46 墨蓝  |  辅助色：#467974 青灰
   日间背景：#F7F9FC  |  暗黑背景：#0F1726
   ═══════════════════════════════════════════════════════════════════ */

/* ── CSS 变量（日间默认） ── */
:root {
  --primary: #162A46;
  --primary-light: #1E3A5F;
  --primary-dark: #0F1D33;
  --accent: #467974;
  --accent-light: #5A9690;
  --text: #333;
  --text-secondary: #666;
  --text-light: #999;
  --bg: #F7F9FC;
  --bg-card: #FFFFFF;
  --bg-sidebar: #FFFFFF;
  --bg-header: #162A46;
  --bg-tag: #E8EDF2;
  --bg-tag-hover: #D0D8E0;
  --border: #E0E4E8;
  --shadow: 0 1px 3px rgba(0,0,0,0.08);
  --shadow-hover: 0 4px 16px rgba(0,0,0,0.12);
  --radius: 8px;
  --transition: 0.2s ease;
  --font: 'Microsoft YaHei', 'Source Han Sans CN', -apple-system, sans-serif;
  --line-height: 1.75;
}

/* ── 暗黑模式 ── */
[data-theme="dark"] {
  --primary: #1E3A5F;
  --primary-light: #2A4D7A;
  --primary-dark: #0F1D33;
  --accent: #5A9690;
  --accent-light: #6DB0A9;
  --text: #E0E4E8;
  --text-secondary: #A0A8B4;
  --text-light: #6B7280;
  --bg: #0F1726;
  --bg-card: #1A2332;
  --bg-sidebar: #1A2332;
  --bg-header: #0F1D33;
  --bg-tag: #1E2D3D;
  --bg-tag-hover: #2A3D52;
  --border: #2A3D52;
  --shadow: 0 1px 3px rgba(0,0,0,0.3);
  --shadow-hover: 0 4px 16px rgba(0,0,0,0.5);
}

/* ── 全局重置 ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; scroll-behavior: smooth; }
body {
  font-family: var(--font);
  color: var(--text);
  background: var(--bg);
  line-height: var(--line-height);
  min-height: 100vh;
  transition: background var(--transition), color var(--transition);
}
a { text-decoration: none; color: inherit; }
img { max-width: 100%; display: block; }
button { cursor: pointer; font-family: inherit; border: none; outline: none; }
input, select, textarea { font-family: inherit; outline: none; }

/* ── 顶部 Header ── */
.zs-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  background: var(--bg-header); color: #fff;
  height: 56px; display: flex; align-items: center;
  padding: 0 20px; gap: 16px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.15);
}
.zs-header .logo {
  font-size: 1.25rem; font-weight: 700;
  letter-spacing: 2px; white-space: nowrap;
  user-select: none;
}
.zs-header .nav-menu {
  display: flex; gap: 4px; flex: 1; justify-content: center;
}
.zs-header .nav-menu button {
  background: transparent; color: rgba(255,255,255,0.75);
  padding: 6px 16px; border-radius: 6px; font-size: 0.9rem;
  transition: all var(--transition);
}
.zs-header .nav-menu button:hover,
.zs-header .nav-menu button.active { color: #fff; background: rgba(255,255,255,0.12); }
.zs-header .header-right { display: flex; align-items: center; gap: 10px; }
.zs-header .search-box {
  display: flex; align-items: center; background: rgba(255,255,255,0.12);
  border-radius: 20px; padding: 4px 12px; gap: 6px;
}
.zs-header .search-box input {
  background: transparent; border: none; color: #fff;
  width: 160px; font-size: 0.85rem;
}
.zs-header .search-box input::placeholder { color: rgba(255,255,255,0.5); }
.zs-header .search-box button {
  background: transparent; color: rgba(255,255,255,0.7);
  font-size: 1rem; padding: 2px;
}
.zs-header .theme-btn {
  background: rgba(255,255,255,0.12); color: #fff;
  width: 34px; height: 34px; border-radius: 50%;
  font-size: 1.1rem; display: flex; align-items: center; justify-content: center;
  transition: all var(--transition);
}
.zs-header .theme-btn:hover { background: rgba(255,255,255,0.2); }

/* ── 汉堡菜单按钮（手机） ── */
.hamburger {
  display: none; background: transparent; color: #fff;
  font-size: 1.5rem; width: 36px; height: 36px;
  align-items: center; justify-content: center;
}

/* ── 主体布局 ── */
.zs-layout {
  display: flex; margin-top: 56px; min-height: calc(100vh - 56px);
  max-width: 1400px; margin-left: auto; margin-right: auto;
}

/* ── 左侧筛选栏 ── */
.zs-sidebar {
  width: 220px; min-width: 220px; background: var(--bg-sidebar);
  border-right: 1px solid var(--border);
  padding: 16px 12px; overflow-y: auto;
  position: sticky; top: 56px; height: calc(100vh - 56px);
  transition: transform var(--transition);
}
.zs-sidebar .sidebar-section { margin-bottom: 20px; }
.zs-sidebar .sidebar-title {
  font-size: 0.8rem; color: var(--text-light);
  text-transform: uppercase; letter-spacing: 1px;
  margin-bottom: 8px; padding-left: 4px;
}
.zs-sidebar .cat-item {
  display: block; width: 100%; text-align: left;
  padding: 8px 12px; border-radius: 6px; font-size: 0.9rem;
  color: var(--text-secondary); background: transparent;
  transition: all var(--transition);
}
.zs-sidebar .cat-item:hover { background: var(--bg-tag); color: var(--text); }
.zs-sidebar .cat-item.active { background: var(--primary); color: #fff; }
.zs-sidebar .tag-cloud { display: flex; flex-wrap: wrap; gap: 6px; }
.zs-sidebar .tag-item {
  padding: 4px 10px; border-radius: 12px; font-size: 0.78rem;
  background: var(--bg-tag); color: var(--text-secondary);
  transition: all var(--transition);
}
.zs-sidebar .tag-item:hover { background: var(--bg-tag-hover); color: var(--text); }
.zs-sidebar .tag-item.active { background: var(--accent); color: #fff; }
.zs-sidebar .time-filter { display: flex; flex-direction: column; gap: 4px; }
.zs-sidebar .time-item {
  display: block; width: 100%; text-align: left;
  padding: 6px 12px; border-radius: 6px; font-size: 0.85rem;
  color: var(--text-secondary); background: transparent;
  transition: all var(--transition);
}
.zs-sidebar .time-item:hover { background: var(--bg-tag); }
.zs-sidebar .time-item.active { background: var(--accent); color: #fff; }
.zs-sidebar .type-toggle { display: flex; gap: 6px; }
.zs-sidebar .type-btn {
  flex: 1; padding: 6px 8px; border-radius: 6px; font-size: 0.8rem;
  background: var(--bg-tag); color: var(--text-secondary);
  transition: all var(--transition);
}
.zs-sidebar .type-btn.active { background: var(--accent); color: #fff; }
.zs-sidebar .stats-card {
  background: var(--bg); border-radius: var(--radius);
  padding: 12px; font-size: 0.85rem;
}
.zs-sidebar .stats-card .stat-row {
  display: flex; justify-content: space-between;
  padding: 4px 0; color: var(--text-secondary);
}
.zs-sidebar .stats-card .stat-val { font-weight: 700; color: var(--primary); }

/* ── 中间主内容区 ── */
.zs-main {
  flex: 1; padding: 20px; min-width: 0;
}
.zs-main .view-toggle {
  display: flex; align-items: center; gap: 8px; margin-bottom: 16px;
}
.zs-main .view-toggle button {
  padding: 6px 14px; border-radius: 6px; font-size: 0.85rem;
  background: var(--bg-tag); color: var(--text-secondary);
  transition: all var(--transition);
}
.zs-main .view-toggle button.active { background: var(--primary); color: #fff; }
.zs-main .filter-tags {
  display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 12px;
}
.zs-main .filter-tag {
  display: inline-flex; align-items: center; gap: 4px;
  padding: 3px 10px; border-radius: 12px; font-size: 0.78rem;
  background: var(--accent); color: #fff;
}
.zs-main .filter-tag .remove-filter {
  background: transparent; color: rgba(255,255,255,0.7);
  font-size: 0.85rem; line-height: 1; padding: 0;
}
.zs-main .filter-tag .remove-filter:hover { color: #fff; }

/* ── 卡片网格视图 ── */
.card-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
}
.card-grid.list-view {
  grid-template-columns: 1fr;
}

/* ── 图文卡片 ── */
.zs-card {
  background: var(--bg-card); border-radius: var(--radius);
  box-shadow: var(--shadow); overflow: hidden;
  transition: all var(--transition); cursor: pointer;
  position: relative;
}
.zs-card:hover { box-shadow: var(--shadow-hover); transform: translateY(-2px); }
.zs-card .card-cover {
  height: 180px; overflow: hidden; position: relative;
  background: var(--bg-tag);
}
.zs-card .card-cover img {
  width: 100%; height: 100%; object-fit: cover;
}
.zs-card .card-cover .text-badge {
  width: 100%; height: 100%; display: flex; align-items: center; justify-content: center;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff; font-size: 2.5rem; font-weight: 700;
}
.zs-card .card-badge {
  position: absolute; bottom: 8px; right: 8px;
  background: rgba(0,0,0,0.6); color: #fff;
  padding: 2px 8px; border-radius: 10px; font-size: 0.72rem;
}
.zs-card .card-body { padding: 14px; }
.zs-card .card-title {
  font-size: 0.95rem; font-weight: 600; color: var(--text);
  line-height: 1.5; display: -webkit-box;
  -webkit-line-clamp: 2; -webkit-box-orient: vertical;
  overflow: hidden; margin-bottom: 8px;
}
.zs-card .card-source {
  font-size: 0.78rem; color: var(--text-light); margin-bottom: 6px;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.zs-card .card-tags { display: flex; flex-wrap: wrap; gap: 4px; margin-bottom: 8px; }
.zs-card .card-tag {
  padding: 2px 8px; border-radius: 10px; font-size: 0.7rem;
  background: var(--bg-tag); color: var(--text-secondary);
}
.zs-card .card-footer {
  display: flex; align-items: center; justify-content: space-between;
  font-size: 0.75rem; color: var(--text-light);
  border-top: 1px solid var(--border); padding-top: 10px;
}
.zs-card .card-footer .fav-btn {
  background: transparent; color: var(--text-light); font-size: 1rem;
  padding: 2px 4px; transition: all var(--transition);
}
.zs-card .card-footer .fav-btn.favorited { color: #E74C3C; }
.zs-card .card-footer .fav-btn:hover { color: #E74C3C; }

/* ── 列表视图卡片 ── */
.list-view .zs-card {
  display: flex; flex-direction: row;
}
.list-view .zs-card .card-cover {
  width: 240px; min-width: 240px; height: auto; min-height: 160px;
}
.list-view .zs-card .card-body { flex: 1; }

/* ── 右侧辅助栏 ── */
.zs-rightbar {
  width: 260px; min-width: 260px; background: var(--bg-sidebar);
  border-left: 1px solid var(--border); padding: 16px 12px;
  overflow-y: auto; position: sticky; top: 56px;
  height: calc(100vh - 56px);
}
.zs-rightbar .right-section { margin-bottom: 20px; }
.zs-rightbar .right-title {
  font-size: 0.82rem; font-weight: 600; color: var(--text);
  margin-bottom: 10px; padding-bottom: 6px;
  border-bottom: 2px solid var(--accent);
}
.zs-rightbar .pinned-item {
  padding: 8px 0; border-bottom: 1px solid var(--border);
  cursor: pointer; transition: color var(--transition);
}
.zs-rightbar .pinned-item:hover { color: var(--accent); }
.zs-rightbar .pinned-item .pinned-title {
  font-size: 0.85rem; font-weight: 500;
  display: -webkit-box; -webkit-line-clamp: 1; -webkit-box-orient: vertical;
  overflow: hidden;
}
.zs-rightbar .pinned-item .pinned-date {
  font-size: 0.72rem; color: var(--text-light); margin-top: 2px;
}
.zs-rightbar .latest-item {
  padding: 6px 0; font-size: 0.82rem; color: var(--text-secondary);
  cursor: pointer; transition: color var(--transition);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.zs-rightbar .latest-item:hover { color: var(--accent); }
.zs-rightbar .chart-bar {
  display: flex; align-items: center; gap: 8px; margin-bottom: 6px;
  font-size: 0.75rem;
}
.zs-rightbar .chart-bar .bar-label { width: 60px; text-align: right; color: var(--text-secondary); }
.zs-rightbar .chart-bar .bar-track {
  flex: 1; height: 8px; background: var(--bg-tag); border-radius: 4px; overflow: hidden;
}
.zs-rightbar .chart-bar .bar-fill {
  height: 100%; background: var(--accent); border-radius: 4px;
  transition: width 0.5s ease;
}
.zs-rightbar .chart-bar .bar-count { width: 30px; color: var(--text-light); }
.zs-rightbar .submit-btn {
  display: block; width: 100%; padding: 10px; border-radius: var(--radius);
  background: var(--primary); color: #fff; font-size: 0.9rem; font-weight: 600;
  text-align: center; transition: all var(--transition);
}
.zs-rightbar .submit-btn:hover { background: var(--primary-light); }

/* ── 加载状态 ── */
.zs-loading {
  text-align: center; padding: 40px; color: var(--text-light);
}
.zs-loading .spinner {
  width: 32px; height: 32px; border: 3px solid var(--border);
  border-top-color: var(--accent); border-radius: 50%;
  animation: spin 0.8s linear infinite; margin: 0 auto 12px;
}
@keyframes spin { to { transform: rotate(360deg); } }
.zs-empty {
  text-align: center; padding: 60px 20px; color: var(--text-light); font-size: 0.95rem;
}

/* ── 提示 Toast ── */
.zs-toast {
  position: fixed; top: 70px; left: 50%; transform: translateX(-50%);
  z-index: 9999; padding: 10px 24px; border-radius: 8px;
  font-size: 0.9rem; color: #fff; opacity: 0;
  transition: opacity 0.3s ease; pointer-events: none;
}
.zs-toast.show { opacity: 1; }
.zs-toast.info { background: #3B82F6; }
.zs-toast.success { background: #10B981; }
.zs-toast.error { background: #EF4444; }

/* ── 模态弹窗（交互详情/确认） ── */
.zs-modal-overlay {
  position: fixed; inset: 0; z-index: 5000;
  background: rgba(0,0,0,0.5); display: flex; align-items: center; justify-content: center;
  transition: opacity var(--transition);
}
.zs-modal-overlay.hidden { display: none; }
.zs-modal {
  background: var(--bg-card); border-radius: 12px; padding: 24px;
  max-width: 500px; width: 90%; max-height: 80vh; overflow-y: auto;
  box-shadow: 0 8px 32px rgba(0,0,0,0.2);
}
.zs-modal h3 { margin-bottom: 16px; color: var(--text); }
.zs-modal .modal-body { font-size: 0.85rem; color: var(--text-secondary); margin-bottom: 20px; }
.zs-modal .modal-body pre {
  background: var(--bg); padding: 12px; border-radius: 6px;
  font-size: 0.78rem; overflow-x: auto; white-space: pre-wrap; word-break: break-all;
}
.zs-modal .modal-actions { display: flex; gap: 10px; justify-content: flex-end; }
.zs-modal .btn {
  padding: 8px 20px; border-radius: 6px; font-size: 0.85rem; font-weight: 500;
  transition: all var(--transition);
}
.zs-modal .btn-primary { background: var(--primary); color: #fff; }
.zs-modal .btn-primary:hover { background: var(--primary-light); }
.zs-modal .btn-danger { background: #D94452; color: #fff; }
.zs-modal .btn-danger:hover { background: #C0392B; }
.zs-modal .btn-cancel { background: var(--bg-tag); color: var(--text-secondary); }
.zs-modal .btn-cancel:hover { background: var(--bg-tag-hover); }

/* ── 响应式 ── */
@media (max-width: 1199px) {
  .zs-rightbar { display: none; }
  .zs-sidebar { width: 200px; min-width: 200px; }
  .card-grid { grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); }
  .list-view .zs-card .card-cover { width: 180px; min-width: 180px; }
}
@media (max-width: 767px) {
  .zs-layout { flex-direction: column; }
  .zs-sidebar {
    position: fixed; top: 56px; left: 0; bottom: 0; z-index: 900;
    width: 260px; transform: translateX(-100%);
    box-shadow: 4px 0 16px rgba(0,0,0,0.15);
  }
  .zs-sidebar.open { transform: translateX(0); }
  .zs-sidebar-overlay {
    display: none; position: fixed; inset: 0; z-index: 899;
    background: rgba(0,0,0,0.4);
  }
  .zs-sidebar-overlay.show { display: block; }
  .hamburger { display: flex; }
  .zs-header .nav-menu { display: none; }
  .zs-header .search-box input { width: 100px; }
  .zs-main { padding: 12px; }
  .card-grid { grid-template-columns: 1fr; }
  .list-view .zs-card { flex-direction: column; }
  .list-view .zs-card .card-cover { width: 100%; min-width: auto; height: 180px; }
}