/* ========================================
   历史上的今天大事件站 - 样式文件
   双主题 + 响应式 + 时间轴
   ======================================== */

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --primary-color: #2563eb;
  --primary-hover: #1d4ed8;
  --secondary-color: #64748b;
  --success-color: #10b981;
  --warning-color: #f59e0b;
  --danger-color: #ef4444;
  --info-color: #06b6d4;

  --category-politics: #dc2626;
  --category-military: #7c2d12;
  --category-tech: #0891b2;
  --category-culture: #7c3aed;
  --category-sports: #16a34a;
  --category-economy: #d97706;
  --category-birth: #ec4899;
  --category-death: #475569;
  --category-disaster: #b91c1c;
  --category-society: #0284c7;

  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;

  --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.1);

  --transition-fast: 150ms ease;
  --transition-normal: 300ms ease;
  --transition-slow: 500ms ease;

  --header-height: 70px;
  --date-bar-height: 60px;
  --sidebar-width: 320px;
  --max-width: 1400px;
}

[data-theme="light"] {
  --bg-primary: #f8fafc;
  --bg-secondary: #ffffff;
  --bg-tertiary: #f1f5f9;
  --bg-card: #ffffff;
  --bg-hover: #f1f5f9;

  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-tertiary: #94a3b8;
  --text-muted: #cbd5e1;

  --border-color: #e2e8f0;
  --border-light: #f1f5f9;

  --timeline-line: #cbd5e1;
  --overlay-bg: rgba(15, 23, 42, 0.5);
}

[data-theme="dark"] {
  --bg-primary: #0f172a;
  --bg-secondary: #1e293b;
  --bg-tertiary: #334155;
  --bg-card: #1e293b;
  --bg-hover: #334155;

  --text-primary: #f8fafc;
  --text-secondary: #cbd5e1;
  --text-tertiary: #94a3b8;
  --text-muted: #64748b;

  --border-color: #334155;
  --border-light: #1e293b;

  --timeline-line: #475569;
  --overlay-bg: rgba(0, 0, 0, 0.7);
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial,
    sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  transition: background-color var(--transition-normal),
    color var(--transition-normal);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

#app {
  flex: 1;
  display: flex;
  flex-direction: column;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
  width: 100%;
}

/* ===== Header ===== */
.site-header {
  background-color: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow-sm);
  transition: background-color var(--transition-normal);
}

.header-inner {
  height: var(--header-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.logo-section {
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.site-title {
  font-size: 1.5rem;
  font-weight: 700;
  background: linear-gradient(135deg, var(--primary-color), var(--info-color));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.02em;
}

.site-subtitle {
  font-size: 0.8rem;
  color: var(--text-tertiary);
  margin-top: 2px;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.sidebar-toggle,
.theme-toggle,
.fav-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.3rem;
  padding: 0.5rem 0.8rem;
  background-color: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  font-size: 1rem;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.sidebar-toggle:hover,
.theme-toggle:hover,
.fav-toggle:hover {
  background-color: var(--bg-hover);
  border-color: var(--primary-color);
  color: var(--primary-color);
  transform: translateY(-1px);
}

.sidebar-toggle {
  display: none;
}

.theme-icon {
  display: none;
}

[data-theme="light"] .theme-icon.light {
  display: inline;
}

[data-theme="dark"] .theme-icon.dark {
  display: inline;
}

.fav-count {
  background-color: var(--primary-color);
  color: white;
  font-size: 0.7rem;
  font-weight: 600;
  min-width: 20px;
  height: 20px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0 0.35rem;
}

/* ===== Date Bar ===== */
.date-bar {
  background-color: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  transition: background-color var(--transition-normal);
}

.date-bar-inner {
  height: var(--date-bar-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.today-display {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.today-label {
  color: var(--text-tertiary);
  font-size: 0.9rem;
}

.today-date {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--primary-color);
}

.date-select-wrap {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  flex-wrap: wrap;
}

.date-label {
  color: var(--text-secondary);
  font-size: 0.9rem;
  white-space: nowrap;
}

.date-select {
  padding: 0.5rem 0.8rem;
  background-color: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: 0.95rem;
  cursor: pointer;
  transition: all var(--transition-fast);
  appearance: none;
  background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%2364748b' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6 9 12 15 18 9'%3e%3c/polyline%3e%3c/svg%3e");
  background-repeat: no-repeat;
  background-position: right 0.6rem center;
  background-size: 1em;
  padding-right: 2.2rem;
}

.date-select:hover {
  border-color: var(--primary-color);
}

.date-select:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.5rem 1rem;
  font-size: 0.9rem;
  font-weight: 500;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
  white-space: nowrap;
  user-select: none;
}

.btn:active {
  transform: translateY(0);
}

.btn-primary {
  background-color: var(--primary-color);
  color: white;
  border-color: var(--primary-color);
}

.btn-primary:hover {
  background-color: var(--primary-hover);
  border-color: var(--primary-hover);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-secondary {
  background-color: var(--bg-tertiary);
  color: var(--text-primary);
  border-color: var(--border-color);
}

.btn-secondary:hover {
  background-color: var(--bg-hover);
  border-color: var(--primary-color);
  color: var(--primary-color);
}

.btn-ghost {
  background-color: transparent;
  color: var(--text-secondary);
  border-color: transparent;
}

.btn-ghost:hover {
  background-color: var(--bg-tertiary);
  color: var(--text-primary);
}

.btn-random {
  width: 100%;
  margin-bottom: 0.5rem;
  background: linear-gradient(135deg, var(--primary-color), var(--info-color));
  color: white;
  border: none;
}

.btn-random:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

/* ===== Filter Bar ===== */
.filter-bar {
  background-color: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  padding: 1rem 0;
  transition: background-color var(--transition-normal);
}

.category-tabs-wrap {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  margin-bottom: 1rem;
  scrollbar-width: thin;
  scrollbar-color: var(--border-color) transparent;
}

.category-tabs-wrap::-webkit-scrollbar {
  height: 4px;
}

.category-tabs-wrap::-webkit-scrollbar-track {
  background: transparent;
}

.category-tabs-wrap::-webkit-scrollbar-thumb {
  background-color: var(--border-color);
  border-radius: 2px;
}

.category-tabs {
  display: flex;
  gap: 0.5rem;
  padding-bottom: 0.25rem;
  min-width: max-content;
}

.tab-btn {
  padding: 0.5rem 1rem;
  background-color: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-full, 999px);
  color: var(--text-secondary);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
  border-radius: 999px;
}

.tab-btn:hover {
  background-color: var(--bg-hover);
  color: var(--text-primary);
  border-color: var(--text-tertiary);
}

.tab-btn.active {
  background-color: var(--primary-color);
  color: white;
  border-color: var(--primary-color);
}

.tab-btn.active::before {
  content: '';
  display: inline-block;
  width: 8px;
  height: 8px;
  background-color: white;
  border-radius: 50%;
  margin-right: 0.4rem;
  vertical-align: middle;
}

.secondary-filters {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.search-wrap {
  position: relative;
  flex: 1;
  min-width: 250px;
}

.search-input {
  width: 100%;
  padding: 0.6rem 2.5rem 0.6rem 1rem;
  background-color: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: 0.95rem;
  transition: all var(--transition-fast);
}

.search-input::placeholder {
  color: var(--text-tertiary);
}

.search-input:hover {
  border-color: var(--text-tertiary);
}

.search-input:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
  background-color: var(--bg-secondary);
}

.search-clear {
  position: absolute;
  right: 0.6rem;
  top: 50%;
  transform: translateY(-50%);
  width: 24px;
  height: 24px;
  display: none;
  align-items: center;
  justify-content: center;
  background-color: var(--bg-hover);
  border: none;
  border-radius: 50%;
  color: var(--text-tertiary);
  cursor: pointer;
  font-size: 0.75rem;
  transition: all var(--transition-fast);
}

.search-clear.show {
  display: flex;
}

.search-clear:hover {
  background-color: var(--danger-color);
  color: white;
}

.filter-label {
  color: var(--text-tertiary);
  font-size: 0.875rem;
  white-space: nowrap;
}

.sort-wrap {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.sort-select {
  padding: 0.5rem 0.8rem;
  background-color: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: 0.875rem;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.sort-select:hover {
  border-color: var(--primary-color);
}

.sort-select:focus {
  outline: none;
  border-color: var(--primary-color);
}

/* ===== Main Content ===== */
.main-content {
  flex: 1;
  padding: 1.5rem 0;
}

.layout-wrap {
  display: grid;
  grid-template-columns: 1fr var(--sidebar-width);
  gap: 1.5rem;
  align-items: start;
}

.content-area {
  min-width: 0;
}

/* ===== State Views ===== */
.state-view {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 4rem 2rem;
  text-align: center;
  background-color: var(--bg-card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
}

.loading-state .spinner {
  width: 50px;
  height: 50px;
  border: 4px solid var(--border-color);
  border-top-color: var(--primary-color);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin-bottom: 1.5rem;
}

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

.loading-state p {
  color: var(--text-secondary);
  font-size: 1rem;
}

.empty-state {
  min-height: 400px;
}

.empty-icon {
  font-size: 4rem;
  margin-bottom: 1rem;
  opacity: 0.6;
}

.empty-state h3 {
  font-size: 1.25rem;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.empty-state p {
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
}

/* ===== Timeline ===== */
.timeline-container {
  animation: fadeIn var(--transition-normal);
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

.timeline-stats {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.5rem;
  padding: 0.75rem 1rem;
  background-color: var(--bg-card);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
}

.result-count {
  font-weight: 600;
  color: var(--primary-color);
}

.current-filter {
  color: var(--text-tertiary);
  font-size: 0.875rem;
}

.timeline {
  position: relative;
  padding-left: 40px;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 14px;
  top: 0;
  bottom: 0;
  width: 2px;
  background-color: var(--timeline-line);
  border-radius: 1px;
}

.timeline-item {
  position: relative;
  margin-bottom: 1.5rem;
  animation: slideIn 0.4s ease backwards;
}

.timeline-item:nth-child(1) { animation-delay: 0.05s; }
.timeline-item:nth-child(2) { animation-delay: 0.1s; }
.timeline-item:nth-child(3) { animation-delay: 0.15s; }
.timeline-item:nth-child(4) { animation-delay: 0.2s; }
.timeline-item:nth-child(5) { animation-delay: 0.25s; }
.timeline-item:nth-child(6) { animation-delay: 0.3s; }
.timeline-item:nth-child(7) { animation-delay: 0.35s; }
.timeline-item:nth-child(8) { animation-delay: 0.4s; }

@keyframes slideIn {
  from { opacity: 0; transform: translateX(-20px); }
  to { opacity: 1; transform: translateX(0); }
}

.timeline-dot {
  position: absolute;
  left: -33px;
  top: 1.5rem;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 0.65rem;
  font-weight: 700;
  border: 3px solid var(--bg-primary);
  box-shadow: var(--shadow-md);
  z-index: 2;
  letter-spacing: -0.03em;
  text-align: center;
  line-height: 1;
  word-break: break-all;
}

.timeline-item[data-category="politics"] .timeline-dot { background-color: var(--category-politics); }
.timeline-item[data-category="military"] .timeline-dot { background-color: var(--category-military); }
.timeline-item[data-category="tech"] .timeline-dot { background-color: var(--category-tech); }
.timeline-item[data-category="culture"] .timeline-dot { background-color: var(--category-culture); }
.timeline-item[data-category="sports"] .timeline-dot { background-color: var(--category-sports); }
.timeline-item[data-category="economy"] .timeline-dot { background-color: var(--category-economy); }
.timeline-item[data-category="birth"] .timeline-dot { background-color: var(--category-birth); }
.timeline-item[data-category="death"] .timeline-dot { background-color: var(--category-death); }
.timeline-item[data-category="disaster"] .timeline-dot { background-color: var(--category-disaster); }
.timeline-item[data-category="society"] .timeline-dot { background-color: var(--category-society); }

.event-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  cursor: pointer;
  transition: all var(--transition-normal);
  display: flex;
  flex-direction: column;
}

.event-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary-color);
}

.card-image-wrap {
  position: relative;
  width: 100%;
  padding-top: 40%;
  overflow: hidden;
  background-color: var(--bg-tertiary);
}

.card-image {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.event-card:hover .card-image {
  transform: scale(1.05);
}

.card-year-badge {
  position: absolute;
  top: 0.75rem;
  left: 0.75rem;
  background-color: var(--primary-color);
  color: white;
  padding: 0.3rem 0.7rem;
  border-radius: var(--radius-md);
  font-size: 0.8rem;
  font-weight: 600;
  backdrop-filter: blur(10px);
  background-color: rgba(37, 99, 235, 0.9);
}

.card-fav-btn {
  position: absolute;
  top: 0.75rem;
  right: 0.75rem;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background-color: rgba(255, 255, 255, 0.95);
  border: none;
  color: var(--text-tertiary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  transition: all var(--transition-fast);
  z-index: 2;
}

[data-theme="dark"] .card-fav-btn {
  background-color: rgba(30, 41, 59, 0.95);
}

.card-fav-btn:hover {
  transform: scale(1.15);
  color: var(--warning-color);
}

.card-fav-btn.favorited {
  color: var(--warning-color);
}

.card-body {
  padding: 1rem 1.25rem 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  flex: 1;
}

.card-header-row {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 0.75rem;
}

.card-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.4;
  flex: 1;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.event-card:hover .card-title {
  color: var(--primary-color);
}

.card-meta-row {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.category-tag {
  display: inline-flex;
  align-items: center;
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-weight: 600;
  color: white;
}

.category-tag[data-category="politics"] { background-color: var(--category-politics); }
.category-tag[data-category="military"] { background-color: var(--category-military); }
.category-tag[data-category="tech"] { background-color: var(--category-tech); }
.category-tag[data-category="culture"] { background-color: var(--category-culture); }
.category-tag[data-category="sports"] { background-color: var(--category-sports); }
.category-tag[data-category="economy"] { background-color: var(--category-economy); }
.category-tag[data-category="birth"] { background-color: var(--category-birth); }
.category-tag[data-category="death"] { background-color: var(--category-death); }
.category-tag[data-category="disaster"] { background-color: var(--category-disaster); }
.category-tag[data-category="society"] { background-color: var(--category-society); }

.importance-stars {
  display: flex;
  gap: 1px;
  color: var(--warning-color);
  font-size: 0.85rem;
}

.importance-stars .star.empty {
  color: var(--text-muted);
}

.card-summary {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 0.4rem;
  border-top: 1px dashed var(--border-color);
  margin-top: auto;
}

.card-info-list {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.card-info-item {
  display: flex;
  align-items: center;
  gap: 0.3rem;
  font-size: 0.8rem;
  color: var(--text-tertiary);
}

.card-info-item .icon {
  font-size: 0.9rem;
  opacity: 0.8;
}

.card-view-detail {
  font-size: 0.8rem;
  color: var(--primary-color);
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 0.2rem;
  transition: gap var(--transition-fast);
}

.event-card:hover .card-view-detail {
  gap: 0.5rem;
}

/* ===== Sidebar ===== */
.sidebar {
  position: sticky;
  top: calc(var(--header-height) + var(--date-bar-height) + 100px);
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  animation: fadeIn var(--transition-normal);
}

.sidebar-section {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  transition: all var(--transition-fast);
}

.sidebar-section:hover {
  border-color: var(--text-tertiary);
}

.sidebar-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 1rem;
  padding-bottom: 0.6rem;
  border-bottom: 1px solid var(--border-color);
}

.top10-list {
  display: flex;
  flex-direction: column;
  counter-reset: top10;
}

.top10-item {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  padding: 0.6rem 0;
  border-bottom: 1px dashed var(--border-light);
  cursor: pointer;
  transition: all var(--transition-fast);
  counter-increment: top10;
}

.top10-item:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.top10-item:hover {
  padding-left: 0.3rem;
  background-color: var(--bg-hover);
  border-radius: var(--radius-sm);
}

.top10-item::before {
  content: counter(top10);
  flex-shrink: 0;
  width: 22px;
  height: 22px;
  background-color: var(--bg-tertiary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--text-secondary);
  margin-top: 2px;
}

.top10-item:nth-child(1)::before {
  background-color: #fbbf24;
  color: #92400e;
}
.top10-item:nth-child(2)::before {
  background-color: #d1d5db;
  color: #4b5563;
}
.top10-item:nth-child(3)::before {
  background-color: #f59e0b;
  color: #78350f;
}

.top10-content {
  flex: 1;
  min-width: 0;
}

.top10-title {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-primary);
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 0.2rem;
}

.top10-item:hover .top10-title {
  color: var(--primary-color);
}

.top10-meta {
  font-size: 0.7rem;
  color: var(--text-tertiary);
  display: flex;
  align-items: center;
  gap: 0.3rem;
}

.zodiac-info {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.zodiac-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.5rem 0.75rem;
  background-color: var(--bg-tertiary);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.zodiac-item:hover {
  background-color: var(--bg-hover);
}

.zodiac-label {
  font-size: 0.85rem;
  color: var(--text-secondary);
  font-weight: 500;
}

.zodiac-value {
  font-size: 0.85rem;
  color: var(--text-primary);
  font-weight: 600;
}

/* ===== Back to Top ===== */
.back-to-top {
  position: fixed;
  right: 1.5rem;
  bottom: 1.5rem;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background-color: var(--primary-color);
  color: white;
  border: none;
  font-size: 1.2rem;
  font-weight: 700;
  cursor: pointer;
  box-shadow: var(--shadow-lg);
  transition: all var(--transition-normal);
  z-index: 90;
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
}

.back-to-top.show {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  background-color: var(--primary-hover);
  transform: translateY(-3px);
  box-shadow: var(--shadow-xl);
}

/* ===== Detail Modal ===== */
.detail-modal {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
}

.detail-overlay {
  position: absolute;
  inset: 0;
  background-color: var(--overlay-bg);
  backdrop-filter: blur(4px);
  animation: fadeIn 0.2s ease;
}

.detail-content {
  position: relative;
  width: 100%;
  max-width: 900px;
  max-height: 90vh;
  background-color: var(--bg-card);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  animation: modalIn 0.3s ease;
}

@keyframes modalIn {
  from {
    opacity: 0;
    transform: translateY(30px) scale(0.95);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.detail-close {
  position: absolute;
  top: 1rem;
  right: 1rem;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background-color: var(--bg-tertiary);
  border: none;
  color: var(--text-secondary);
  font-size: 1rem;
  cursor: pointer;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
}

.detail-close:hover {
  background-color: var(--danger-color);
  color: white;
  transform: rotate(90deg);
}

.detail-body {
  overflow-y: auto;
  flex: 1;
  scrollbar-width: thin;
  scrollbar-color: var(--border-color) transparent;
}

.detail-body::-webkit-scrollbar {
  width: 8px;
}

.detail-body::-webkit-scrollbar-track {
  background: transparent;
}

.detail-body::-webkit-scrollbar-thumb {
  background-color: var(--border-color);
  border-radius: 4px;
}

.detail-hero {
  position: relative;
  width: 100%;
  padding-top: 45%;
  background-color: var(--bg-tertiary);
  overflow: hidden;
}

.detail-hero-img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.detail-hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, var(--bg-card) 0%, transparent 50%);
}

.detail-hero-content {
  position: absolute;
  bottom: 1.5rem;
  left: 1.5rem;
  right: 1.5rem;
}

.detail-year-badge {
  display: inline-block;
  background-color: var(--primary-color);
  color: white;
  padding: 0.3rem 0.8rem;
  border-radius: var(--radius-md);
  font-size: 0.9rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
}

.detail-title {
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--text-primary);
  line-height: 1.3;
  text-shadow: 0 2px 10px rgba(0,0,0,0.3);
}

.detail-main {
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.detail-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border-color);
}

.detail-meta .category-tag {
  font-size: 0.85rem;
  padding: 0.3rem 0.8rem;
}

.detail-meta-item {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.3rem 0.6rem;
  background-color: var(--bg-tertiary);
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.detail-section {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.detail-section-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.detail-section-title::before {
  content: '';
  width: 4px;
  height: 18px;
  background-color: var(--primary-color);
  border-radius: 2px;
}

.detail-content-text {
  color: var(--text-secondary);
  line-height: 1.8;
  font-size: 0.95rem;
  padding-left: 0.5rem;
  border-left: 2px solid var(--border-color);
}

.impact-list {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  padding-left: 1.5rem;
}

.impact-list li {
  color: var(--text-secondary);
  line-height: 1.7;
  font-size: 0.9rem;
}

.persons-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 0.75rem;
}

.person-card {
  display: flex;
  gap: 0.75rem;
  padding: 0.75rem;
  background-color: var(--bg-tertiary);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  transition: all var(--transition-fast);
}

.person-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: var(--primary-color);
}

.person-avatar {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background-color: var(--bg-secondary);
  object-fit: cover;
  flex-shrink: 0;
  border: 2px solid var(--border-color);
}

.person-info {
  flex: 1;
  min-width: 0;
}

.person-name {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.15rem;
}

.person-years {
  font-size: 0.75rem;
  color: var(--text-tertiary);
  margin-bottom: 0.3rem;
}

.person-intro {
  font-size: 0.8rem;
  color: var(--text-secondary);
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.related-events {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 0.6rem;
}

.related-card {
  padding: 0.6rem 0.75rem;
  background-color: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.related-card:hover {
  transform: translateY(-1px);
  border-color: var(--primary-color);
  background-color: var(--bg-hover);
}

.related-year {
  font-size: 0.7rem;
  color: var(--primary-color);
  font-weight: 600;
  margin-bottom: 0.2rem;
}

.related-title {
  font-size: 0.85rem;
  color: var(--text-primary);
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  font-weight: 500;
}

.related-card:hover .related-title {
  color: var(--primary-color);
}

.source-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.5rem 1rem;
  background-color: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.875rem;
  transition: all var(--transition-fast);
  align-self: flex-start;
}

.source-link:hover {
  background-color: var(--primary-color);
  color: white;
  border-color: var(--primary-color);
}

/* ===== Sidebar Mask ===== */
.sidebar-mask {
  position: fixed;
  inset: 0;
  background-color: var(--overlay-bg);
  z-index: 149;
  backdrop-filter: blur(2px);
  animation: fadeIn 0.2s ease;
}

/* ===== Footer ===== */
.site-footer {
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: 1.5rem 0;
  margin-top: 2rem;
  transition: background-color var(--transition-normal);
}

.site-footer p {
  text-align: center;
  color: var(--text-tertiary);
  font-size: 0.875rem;
}

/* ===== Responsive ===== */
@media (max-width: 1200px) {
  :root {
    --sidebar-width: 280px;
  }

  .container {
    padding: 0 1rem;
  }

  .layout-wrap {
    grid-template-columns: 1fr var(--sidebar-width);
    gap: 1rem;
  }

  .site-title {
    font-size: 1.3rem;
  }
}

@media (max-width: 992px) {
  .layout-wrap {
    grid-template-columns: 1fr;
  }

  .sidebar {
    position: fixed;
    top: 0;
    right: -100%;
    bottom: 0;
    width: 320px;
    max-width: 85vw;
    background-color: var(--bg-secondary);
    z-index: 150;
    padding: 1.5rem;
    overflow-y: auto;
    transition: right 0.35s ease;
    border-left: 1px solid var(--border-color);
    box-shadow: -10px 0 30px rgba(0,0,0,0.1);
  }

  .sidebar.open {
    right: 0;
  }

  .sidebar-toggle {
    display: flex;
  }

  .timeline {
    padding-left: 35px;
  }

  .timeline::before {
    left: 11px;
  }

  .timeline-dot {
    left: -30px;
    width: 24px;
    height: 24px;
    font-size: 0.6rem;
  }
}

@media (max-width: 768px) {
  :root {
    --header-height: 60px;
    --date-bar-height: auto;
  }

  .container {
    padding: 0 0.75rem;
  }

  .header-inner {
    height: var(--header-height);
  }

  .logo-section .site-subtitle {
    display: none;
  }

  .site-title {
    font-size: 1.1rem;
  }

  .sidebar-toggle,
  .theme-toggle,
  .fav-toggle {
    padding: 0.4rem 0.6rem;
    font-size: 0.9rem;
  }

  .fav-toggle span:first-child {
    display: inline;
  }

  .date-bar-inner {
    height: auto;
    padding: 0.75rem 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0.75rem;
  }

  .today-display {
    justify-content: center;
  }

  .date-select-wrap {
    justify-content: center;
  }

  .date-select {
    font-size: 0.85rem;
    padding: 0.4rem 1.8rem 0.4rem 0.6rem;
  }

  .filter-bar {
    padding: 0.75rem 0;
  }

  .category-tabs {
    gap: 0.35rem;
  }

  .tab-btn {
    padding: 0.4rem 0.8rem;
    font-size: 0.8rem;
  }

  .secondary-filters {
    gap: 0.6rem;
  }

  .search-wrap {
    min-width: 100%;
    order: -1;
  }

  .main-content {
    padding: 1rem 0;
  }

  .state-view {
    padding: 3rem 1rem;
  }

  .timeline-stats {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.4rem;
    padding: 0.6rem 0.8rem;
  }

  .timeline {
    padding-left: 30px;
  }

  .timeline::before {
    left: 9px;
  }

  .timeline-dot {
    left: -27px;
    width: 22px;
    height: 22px;
    top: 1rem;
  }

  .card-body {
    padding: 0.8rem 1rem 1rem;
  }

  .card-title {
    font-size: 1rem;
  }

  .card-footer {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.5rem;
  }

  .card-image-wrap {
    padding-top: 50%;
  }

  .detail-title {
    font-size: 1.3rem;
  }

  .detail-hero-content {
    left: 1rem;
    right: 1rem;
    bottom: 1rem;
  }

  .detail-main {
    padding: 1rem;
  }

  .persons-grid,
  .related-events {
    grid-template-columns: 1fr;
  }

  .back-to-top {
    right: 1rem;
    bottom: 1rem;
    width: 40px;
    height: 40px;
    font-size: 1rem;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 0.5rem;
  }

  .site-title {
    font-size: 1rem;
  }

  .sidebar-toggle,
  .theme-toggle,
  .fav-toggle {
    padding: 0.35rem 0.5rem;
  }

  .fav-count {
    font-size: 0.6rem;
    min-width: 16px;
    height: 16px;
    padding: 0 0.25rem;
  }

  .date-select-wrap {
    gap: 0.4rem;
  }

  .date-label {
    display: none;
  }

  .btn {
    padding: 0.4rem 0.7rem;
    font-size: 0.8rem;
  }

  .category-tabs-wrap {
    margin-bottom: 0.75rem;
  }

  .tab-btn {
    padding: 0.35rem 0.7rem;
    font-size: 0.75rem;
  }

  .timeline {
    padding-left: 0;
  }

  .timeline::before {
    display: none;
  }

  .timeline-dot {
    display: none;
  }

  .timeline-item {
    margin-bottom: 1rem;
  }

  .card-image-wrap {
    padding-top: 56.25%;
  }

  .card-body {
    padding: 0.75rem;
  }

  .card-meta-row {
    gap: 0.35rem;
  }

  .category-tag {
    font-size: 0.7rem;
    padding: 0.15rem 0.5rem;
  }

  .detail-content {
    max-height: 95vh;
    border-radius: var(--radius-lg);
  }

  .detail-modal {
    padding: 0;
  }

  .detail-hero {
    padding-top: 60%;
  }

  .detail-title {
    font-size: 1.1rem;
  }

  .detail-main {
    padding: 0.8rem;
    gap: 1rem;
  }

  .site-footer {
    padding: 1rem 0;
  }

  .site-footer p {
    font-size: 0.75rem;
  }
}

/* ===== Utility ===== */
.no-scroll {
  overflow: hidden;
}

.hidden {
  display: none !important;
}

@media print {
  .site-header,
  .date-bar,
  .filter-bar,
  .sidebar,
  .back-to-top,
  .detail-modal,
  .site-footer {
    display: none !important;
  }

  .main-content {
    padding: 0;
  }

  .layout-wrap {
    display: block;
  }
}