:root {
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-serif: 'Lora', Georgia, Cambria, 'Times New Roman', Times, serif;
  --font-display: 'Cinzel', serif;

  /* Light Theme */
  --bg-main: #f8fafc;
  --bg-card: #ffffff;
  --bg-card-hover: #f1f5f9;
  --bg-header: #ffffff;
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #64748b;
  --border-color: #e2e8f0;
  --border-card: #e2e8f0;
  
  --primary-color: #1e3a8a;       /* Classic Deep Reformed Navy */
  --primary-hover: #172554;
  --primary-light: #eff6ff;
  --accent-gold: #b45309;         /* Amber/Gold Accent */
  --accent-gold-bg: #fef3c7;
  --star-gold: #d97706;

  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
}

body.theme-dark {
  --bg-main: #090d16;
  --bg-card: #111827;
  --bg-card-hover: #1a2234;
  --bg-header: #0d1322;
  --text-primary: #f1f5f9;
  --text-secondary: #cbd5e1;
  --text-muted: #94a3b8;
  --border-color: #1e293b;
  --border-card: #1f293d;

  --primary-color: #3b82f6;
  --primary-hover: #60a5fa;
  --primary-light: rgba(59, 130, 246, 0.15);
  --accent-gold: #f59e0b;
  --accent-gold-bg: rgba(245, 158, 11, 0.15);
  --star-gold: #fbbf24;

  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.3);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.4);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.5);
}

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

body {
  font-family: var(--font-sans);
  background-color: var(--bg-main);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  transition: background-color 0.25s ease, color 0.25s ease;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
  width: 100%;
}

/* Header */
.app-header {
  background-color: var(--bg-header);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 50;
  box-shadow: var(--shadow-sm);
  transition: background-color 0.25s ease;
}

.header-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
  gap: 1.5rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: inherit;
}

.brand-logo {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  background: var(--primary-light);
  color: var(--primary-color);
  border-radius: var(--radius-md);
}

.brand-title {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: 0.5px;
  line-height: 1.1;
  color: var(--text-primary);
}

.brand-subtitle {
  font-size: 0.75rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--accent-gold);
}

/* Nav Tabs */
.nav-tabs {
  display: flex;
  gap: 0.5rem;
  align-items: center;
}

.nav-tab {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.6rem 1rem;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  background: transparent;
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
}

.nav-tab:hover {
  background-color: var(--bg-card-hover);
  color: var(--text-primary);
}

.nav-tab.active {
  background-color: var(--primary-light);
  color: var(--primary-color);
  border-color: var(--primary-light);
}

.badge {
  background-color: var(--accent-gold-bg);
  color: var(--accent-gold);
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.15rem 0.5rem;
  border-radius: 9999px;
}

/* Header Actions */
.header-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.btn-random {
  background-color: var(--accent-gold-bg);
  color: var(--accent-gold);
  border: 1px solid rgba(217, 119, 6, 0.25);
  padding: 0.5rem 0.85rem;
  font-size: 0.85rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  gap: 0.4rem;
  cursor: pointer;
  transition: all 0.2s ease;
  white-space: nowrap;
}

.btn-random:hover {
  background-color: var(--accent-gold);
  color: #ffffff;
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}

.icon-btn {
  background: transparent;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  width: 38px;
  height: 38px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.2s ease;
}

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

.theme-light .moon-icon { display: block; }
.theme-light .sun-icon { display: none; }
.theme-dark .moon-icon { display: none; }
.theme-dark .sun-icon { display: block; }

/* Main Content Views */
.main-content {
  flex: 1;
  padding-top: 2rem;
  padding-bottom: 3rem;
}

.view-panel {
  display: none;
}

.view-panel.active {
  display: block;
}

/* Toolbar & Filters */
.toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.5rem;
}

.search-box {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 0.6rem 1rem;
  flex: 1;
  min-width: 280px;
  max-width: 500px;
  color: var(--text-muted);
  box-shadow: var(--shadow-sm);
}

.search-box input {
  border: none;
  outline: none;
  background: transparent;
  color: var(--text-primary);
  font-size: 0.95rem;
  width: 100%;
}

.clear-search-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 1.2rem;
  cursor: pointer;
}

.filter-group {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.select-dropdown {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  padding: 0.6rem 1rem;
  border-radius: var(--radius-md);
  font-size: 0.9rem;
  outline: none;
  cursor: pointer;
  box-shadow: var(--shadow-sm);
}

.select-dropdown.large-select {
  font-size: 1.05rem;
  padding: 0.75rem 1.25rem;
  width: 100%;
}

/* Stats Bar */
.stream-stats-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 1.5rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--border-color);
}

.naparc-badge {
  background-color: var(--primary-light);
  color: var(--primary-color);
  padding: 0.2rem 0.6rem;
  border-radius: 9999px;
  font-weight: 600;
  font-size: 0.75rem;
}

/* Grid & Cards */
.articles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
  gap: 1.5rem;
}

.article-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-sm);
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
  position: relative;
}

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

.card-link {
  text-decoration: none;
  color: inherit;
  display: flex;
  flex-direction: column;
  flex: 1;
  cursor: pointer;
}

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

.article-card.is-read {
  opacity: 0.75;
}

.card-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.75rem;
  gap: 0.5rem;
}

.card-source-tag {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--primary-color);
  background: var(--primary-light);
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-sm);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.card-date {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.card-title {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-primary);
  line-height: 1.35;
  margin-bottom: 0.75rem;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.card-summary {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.5;
  margin-bottom: 1.25rem;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
  flex: 1;
}

.card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid var(--border-color);
  padding-top: 0.75rem;
  margin-top: auto;
}

.card-author {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-style: italic;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 180px;
}

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

.fav-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 1.3rem;
  cursor: pointer;
  padding: 0.2rem 0.4rem;
  border-radius: var(--radius-sm);
  transition: transform 0.15s ease, color 0.15s ease;
}

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

.fav-btn.is-favorite {
  color: var(--star-gold);
}

/* Site Browser Header */
.site-browser-header {
  background-color: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  margin-bottom: 2rem;
  box-shadow: var(--shadow-sm);
}

.source-select-label {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-secondary);
  display: block;
  margin-bottom: 0.5rem;
}

.source-info-card {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  margin-top: 1.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border-color);
  gap: 1rem;
}

.source-info-main h2 {
  font-family: var(--font-display);
  font-size: 1.4rem;
  color: var(--text-primary);
  margin-bottom: 0.4rem;
}

.source-meta-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem;
}

.source-link, .source-rss-link {
  font-size: 0.85rem;
  font-weight: 600;
  text-decoration: none;
  color: var(--primary-color);
}

.source-link:hover, .source-rss-link:hover {
  text-decoration: underline;
}

.source-rss-link {
  color: var(--accent-gold);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.6rem 1.1rem;
  font-size: 0.9rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
  transition: all 0.2s ease;
}

.btn-primary {
  background-color: var(--primary-color);
  color: #ffffff;
}

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

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

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

.btn-outline-danger {
  background: transparent;
  border-color: #ef4444;
  color: #ef4444;
  font-size: 0.85rem;
}

.btn-outline-danger:hover {
  background-color: #ef4444;
  color: #ffffff;
}

/* History Toolbar */
.history-tabs {
  display: flex;
  gap: 0.5rem;
}

.pill-tab {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  padding: 0.5rem 1rem;
  border-radius: 9999px;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
}

.pill-tab:hover {
  background-color: var(--bg-card-hover);
}

.pill-tab.active {
  background-color: var(--primary-color);
  color: #ffffff;
  border-color: var(--primary-color);
}

.search-input-compact {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 0.5rem 0.85rem;
  font-size: 0.85rem;
  color: var(--text-primary);
  outline: none;
}

/* Empty State */
.empty-state {
  grid-column: 1 / -1;
  text-align: center;
  padding: 4rem 2rem;
  background-color: var(--bg-card);
  border: 1px dashed var(--border-color);
  border-radius: var(--radius-lg);
  color: var(--text-muted);
}

.empty-state svg {
  margin-bottom: 1rem;
  color: var(--text-muted);
}

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

/* Modal Reader */
.modal-overlay {
  position: fixed;
  inset: 0;
  background-color: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(4px);
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
}

.modal-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  max-width: 700px;
  width: 100%;
  max-height: 85vh;
  overflow-y: auto;
  padding: 2.25rem;
  position: relative;
  box-shadow: var(--shadow-lg);
}

.modal-close {
  position: absolute;
  top: 1.25rem;
  right: 1.25rem;
  background: transparent;
  border: none;
  font-size: 1.75rem;
  line-height: 1;
  color: var(--text-muted);
  cursor: pointer;
}

.modal-close:hover {
  color: var(--text-primary);
}

.modal-badges {
  display: flex;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
}

.tag {
  background-color: var(--primary-light);
  color: var(--primary-color);
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-sm);
  font-size: 0.8rem;
  font-weight: 600;
}

.date-tag {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.modal-article-title {
  font-family: var(--font-serif);
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.3;
  margin-bottom: 0.75rem;
}

.modal-author-row {
  font-size: 0.9rem;
  color: var(--text-muted);
  font-style: italic;
  margin-bottom: 1.5rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--border-color);
}

.modal-summary-text {
  font-family: var(--font-serif);
  font-size: 1.1rem;
  line-height: 1.75;
  color: var(--text-secondary);
  margin-bottom: 2rem;
}

.modal-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-top: 1px solid var(--border-color);
  padding-top: 1.25rem;
  gap: 1rem;
}

/* Footer */
.app-footer {
  background-color: var(--bg-header);
  border-top: 1px solid var(--border-color);
  padding: 2rem 0;
  margin-top: auto;
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.footer-sub {
  margin-top: 0.25rem;
  font-size: 0.75rem;
}

/* Pagination */
.pagination-controls {
  display: flex;
  justify-content: center;
  gap: 0.5rem;
  margin-top: 2.5rem;
}

.pagination-btn {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  padding: 0.5rem 0.9rem;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
}

.pagination-btn.active {
  background-color: var(--primary-color);
  color: #ffffff;
  border-color: var(--primary-color);
}

.pagination-btn:hover:not(.active) {
  background-color: var(--bg-card-hover);
}

/* Responsive */
@media (max-width: 768px) {
  .header-container {
    flex-direction: column;
    height: auto;
    padding: 1rem 1.5rem;
    gap: 1rem;
  }
  .nav-tabs {
    width: 100%;
    justify-content: space-between;
  }
  .nav-tab {
    font-size: 0.8rem;
    padding: 0.5rem 0.75rem;
  }
  .articles-grid {
    grid-template-columns: 1fr;
  }
  .toolbar {
    flex-direction: column;
    align-items: stretch;
  }
  .search-box {
    max-width: 100%;
  }
}