:root {
  --bg: #f8fafc;
  --sidebar-bg: #1e293b;
  --sidebar-text: #e2e8f0;
  --card-bg: #ffffff;
  --text: #1e293b;
  --text-muted: #64748b;
  --accent: #3b82f6;
  --border: #e2e8f0;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

.layout {
  display: flex;
  min-height: 100vh;
}

/* Sidebar */
.sidebar {
  width: 280px;
  background: var(--sidebar-bg);
  color: var(--sidebar-text);
  padding: 1.5rem;
  position: fixed;
  height: 100vh;
  overflow-y: auto;
}

.sidebar-header { margin-bottom: 1.5rem; }
.logo {
  color: white;
  font-size: 1.5rem;
  font-weight: bold;
  text-decoration: none;
}

.sidebar-search { margin-bottom: 1.5rem; position: relative; }
.sidebar-search input {
  width: 100%;
  padding: 0.5rem 0.75rem;
  border: none;
  border-radius: 0.375rem;
  background: rgba(255,255,255,0.1);
  color: white;
  font-size: 0.875rem;
}
.sidebar-search input::placeholder { color: rgba(255,255,255,0.5); }
.sidebar-search input:focus { outline: 2px solid var(--accent); }

.sidebar-clear-btn {
  display: none;
  width: 100%;
  margin-top: 0.5rem;
  padding: 0.5rem 0.75rem;
  background: #f59e0b;
  color: white;
  border: none;
  border-radius: 0.375rem;
  font-size: 0.8rem;
  cursor: pointer;
  transition: background 0.15s;
}
.sidebar-clear-btn:hover {
  background: #d97706;
}

.nav-list {
  list-style: none;
  margin-bottom: 1.5rem;
}
.nav-list li a {
  display: block;
  padding: 0.5rem 0.75rem;
  color: var(--sidebar-text);
  text-decoration: none;
  border-radius: 0.375rem;
  transition: background 0.2s;
}
.nav-list li a:hover, .nav-list li a.active {
  background: rgba(255,255,255,0.1);
}

.nav-group { margin-bottom: 0.5rem; }
.nav-group summary {
  padding: 0.5rem 0.75rem;
  cursor: pointer;
  font-weight: 600;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: rgba(255,255,255,0.6);
}
.nav-group ul { list-style: none; margin-left: 0.75rem; }
.nav-group ul li a {
  display: block;
  padding: 0.375rem 0.75rem;
  color: var(--sidebar-text);
  text-decoration: none;
  font-size: 0.875rem;
  border-radius: 0.375rem;
}
.nav-group ul li a:hover { background: rgba(255,255,255,0.1); }

/* Main content */
.main-content {
  flex: 1;
  margin-left: 280px;
  padding: 2rem;
}

.page-header {
  margin-bottom: 2rem;
}
.page-header h1 { font-size: 1.75rem; margin-bottom: 0.25rem; }
.page-header p { color: var(--text-muted); }

/* Bookmark grid */
.bookmark-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.5rem;
}

.bookmark-card {
  background: var(--card-bg);
  border-radius: 0.75rem;
  overflow: hidden;
  box-shadow: 0 1px 3px rgba(0,0,0,0.1);
  transition: box-shadow 0.2s;
}
.bookmark-card:hover { box-shadow: 0 4px 12px rgba(0,0,0,0.15); }
.bookmark-card.hidden { display: none; }

.bookmark-cover {
  width: 100%;
  height: 160px;
  object-fit: cover;
  background: var(--border);
}

.bookmark-content { padding: 1rem; }
.bookmark-content h3 {
  font-size: 1rem;
  margin-bottom: 0.5rem;
  line-height: 1.4;
}
.bookmark-content h3 a {
  color: var(--text);
  text-decoration: none;
}
.bookmark-content h3 a:hover { color: var(--accent); }

.bookmark-meta {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-bottom: 0.5rem;
}
.favorite { color: #eab308; }

.excerpt {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
}

.bookmark-footer {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.tags { display: flex; flex-wrap: wrap; gap: 0.375rem; }
.tag {
  display: inline-block;
  padding: 0.125rem 0.5rem;
  background: var(--bg);
  border-radius: 9999px;
  font-size: 0.75rem;
  color: var(--text-muted);
  text-decoration: none;
}
.tag:hover { background: var(--border); }

.footer-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.75rem;
  color: var(--text-muted);
}
.collection-link { color: var(--accent); text-decoration: none; }

/* Tags page */
.tags-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}
.tags-list .tag {
  font-size: 0.875rem;
  padding: 0.375rem 0.75rem;
}
.tags-list .tag-count { color: var(--text-muted); margin-left: 0.25rem; }

/* Pagination */
.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 0.5rem;
  margin-top: 2rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
}
.page-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 2.5rem;
  height: 2.5rem;
  padding: 0 0.75rem;
  border-radius: 0.375rem;
  background: var(--card-bg);
  color: var(--text);
  text-decoration: none;
  font-size: 0.875rem;
  border: 1px solid var(--border);
  transition: all 0.2s;
}
.page-link:hover { background: var(--bg); border-color: var(--accent); }
.page-link.active {
  background: var(--accent);
  color: white;
  border-color: var(--accent);
}
.page-ellipsis { color: var(--text-muted); }

/* Global Search Results */
.sidebar-search {
  position: relative;
}

.global-search-results {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  max-height: 400px;
  overflow-y: auto;
  background: var(--card-bg);
  border-radius: 0.5rem;
  box-shadow: 0 10px 40px rgba(0,0,0,0.3);
  z-index: 100;
  margin-top: 0.5rem;
}

.global-search-results.active {
  display: block;
}

.search-results-header {
  padding: 0.75rem 1rem;
  font-size: 0.75rem;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border);
  background: var(--bg);
}

.search-result-item {
  display: block;
  padding: 0.75rem 1rem;
  text-decoration: none;
  border-bottom: 1px solid var(--border);
  transition: background 0.15s;
}

.search-result-item:hover {
  background: var(--bg);
}

.search-result-item:last-child {
  border-bottom: none;
}

.search-result-title {
  color: var(--text);
  font-size: 0.875rem;
  font-weight: 500;
  margin-bottom: 0.25rem;
  line-height: 1.4;
}

.search-result-title mark {
  background: #fef08a;
  color: inherit;
  padding: 0 0.125rem;
  border-radius: 2px;
}

.search-result-meta {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.75rem;
  color: var(--text-muted);
}

.search-result-fav {
  color: #eab308;
}

.search-result-tags {
  color: var(--accent);
}

.search-no-results {
  padding: 1.5rem;
  text-align: center;
  color: var(--text-muted);
}

/* Favorites Toggle */
.favorites-toggle-btn {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  width: 100%;
  padding: 0.5rem 0.75rem;
  background: transparent;
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: 0.375rem;
  color: var(--sidebar-text);
  font-size: 0.875rem;
  cursor: pointer;
  transition: all 0.2s;
}

.favorites-toggle-btn:hover {
  background: rgba(255,255,255,0.1);
}

.favorites-toggle-btn.active {
  background: var(--accent);
  border-color: var(--accent);
}

.favorites-toggle-btn .fav-icon {
  color: #eab308;
}

/* Filter Status */
#filter-status {
  display: none;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-top: 1rem;
  padding: 0.75rem 1rem;
  background: #fef3c7;
  border-radius: 0.5rem;
  font-size: 0.875rem;
}

.filter-info {
  color: #92400e;
}

.clear-filters {
  padding: 0.375rem 0.75rem;
  background: #f59e0b;
  color: white;
  border: none;
  border-radius: 0.375rem;
  font-size: 0.75rem;
  cursor: pointer;
  transition: background 0.15s;
}

.clear-filters:hover {
  background: #d97706;
}

/* Tag hover enhancement */
.tag {
  cursor: pointer;
  transition: all 0.15s;
}

.tag:hover {
  background: var(--accent);
  color: white;
}

/* Quick Filter Buttons */
.quick-filters {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
  padding: 1rem;
  background: var(--card-bg);
  border-radius: 0.5rem;
  box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}

.quick-filters-label {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-right: 0.25rem;
}

.quick-filter-btn {
  padding: 0.375rem 0.75rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 9999px;
  font-size: 0.8rem;
  color: var(--text);
  cursor: pointer;
  transition: all 0.15s;
}

.quick-filter-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.quick-filter-btn.active {
  background: var(--accent);
  border-color: var(--accent);
  color: white;
}

/* Responsive */
@media (max-width: 768px) {
  .sidebar {
    position: static;
    width: 100%;
    height: auto;
  }
  .main-content { margin-left: 0; }
  .layout { flex-direction: column; }
  .pagination { flex-wrap: wrap; }

  .global-search-results {
    position: fixed;
    left: 1rem;
    right: 1rem;
    top: auto;
    max-height: 50vh;
  }

  .quick-filters {
    padding: 0.75rem;
  }

  .quick-filters-label {
    width: 100%;
    margin-bottom: 0.25rem;
  }
}