/* ==========================================================================
   Design System & Variables
   ========================================================================== */

:root {
  /* Fonts */
  --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
  --font-display: 'Outfit', sans-serif;

  /* Sizing & Spacing */
  --sidebar-width: 280px;
  --header-height: 80px;
  --border-radius-sm: 8px;
  --border-radius-md: 12px;
  --border-radius-lg: 20px;
  --border-radius-full: 9999px;
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);

  /* Shared Gradients */
  --accent-gradient: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #d946ef 100%);
  --skeleton-gradient: linear-gradient(90deg, var(--bg-tertiary) 25%, var(--border-hover) 50%, var(--bg-tertiary) 75%);

  /* Dark Theme Variables (Default) */
  --bg-primary: #090d16;
  --bg-secondary: #111827;
  --bg-tertiary: #1f2937;
  --bg-hover: #1e293b;
  --accent-color: #6366f1;
  --accent-hover: #4f46e5;
  --accent-light: rgba(99, 102, 241, 0.15);
  
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  
  --border-color: rgba(255, 255, 255, 0.06);
  --border-hover: rgba(255, 255, 255, 0.12);
  
  --glass-bg: rgba(17, 24, 39, 0.7);
  --glass-border: rgba(255, 255, 255, 0.08);
  --glass-blur: blur(16px);
  
  --shadow-sm: 0 2px 8px -1px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 10px 25px -5px rgba(0, 0, 0, 0.3), 0 8px 16px -6px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 20px 2px rgba(99, 102, 241, 0.2);
  
  --toast-success-bg: rgba(16, 185, 129, 0.15);
  --toast-success-border: rgba(16, 185, 129, 0.3);
  --toast-success-text: #34d399;
}

/* Light Theme Variables */
html[data-theme="light"] {
  --bg-primary: #f8fafc;
  --bg-secondary: #ffffff;
  --bg-tertiary: #f1f5f9;
  --bg-hover: #e2e8f0;
  --accent-color: #4f46e5;
  --accent-hover: #3730a3;
  --accent-light: rgba(79, 70, 229, 0.1);
  
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  
  --border-color: rgba(0, 0, 0, 0.06);
  --border-hover: rgba(0, 0, 0, 0.12);
  
  --glass-bg: rgba(255, 255, 255, 0.75);
  --glass-border: rgba(0, 0, 0, 0.06);
  --glass-blur: blur(16px);
  
  --shadow-sm: 0 2px 8px -1px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 10px 25px -5px rgba(0, 0, 0, 0.08), 0 8px 16px -6px rgba(0, 0, 0, 0.05);
  --shadow-lg: 0 25px 50px -12px rgba(0, 0, 0, 0.15);
  --shadow-glow: 0 0 20px 2px rgba(79, 70, 229, 0.1);
}

/* Reset and Base Styles */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  overflow-x: hidden;
  height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
  background: var(--bg-tertiary);
  border-radius: var(--border-radius-full);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--text-muted);
}

/* Typography Helper */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.2;
}

/* ==========================================================================
   Layout Containers
   ========================================================================== */

.app-container {
  display: flex;
  height: 100vh;
  width: 100vw;
  position: relative;
  overflow: hidden;
}

/* Sidebar Styling */
.app-sidebar {
  width: var(--sidebar-width);
  height: 100%;
  background-color: var(--bg-secondary);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
  transition: transform var(--transition-normal);
  z-index: 100;
}

.sidebar-header {
  height: var(--header-height);
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border-color);
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-logo {
  width: 40px;
  height: 40px;
  border-radius: var(--border-radius-md);
  background: var(--accent-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-glow);
}

.brand-logo span {
  color: #fff;
  font-size: 24px;
}

.brand-text h1 {
  font-size: 18px;
  letter-spacing: -0.5px;
  color: var(--text-primary);
}

.brand-text span {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-muted);
  display: block;
  margin-top: -2px;
}

.close-sidebar-btn {
  display: none;
}

/* Sidebar Navigation */
.sidebar-nav {
  flex-grow: 1;
  padding: 24px 16px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.nav-section {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.section-title {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--text-muted);
  margin-bottom: 8px;
  padding-left: 12px;
}

.section-header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 8px;
  padding-left: 12px;
  padding-right: 4px;
}

.section-header-row .section-title {
  margin-bottom: 0;
  padding-left: 0;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 14px;
  border: none;
  background: none;
  color: var(--text-secondary);
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 500;
  border-radius: var(--border-radius-md);
  cursor: pointer;
  text-align: left;
  transition: all var(--transition-fast);
  width: 100%;
}

.nav-item span:first-of-type {
  font-size: 20px;
  transition: color var(--transition-fast);
}

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

.nav-item.active {
  background-color: var(--accent-light);
  color: var(--accent-color);
  font-weight: 600;
}

.nav-item.active span:first-of-type {
  color: var(--accent-color);
}

.nav-item .badge {
  margin-left: auto;
  background-color: var(--bg-tertiary);
  color: var(--text-secondary);
  font-size: 11px;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: var(--border-radius-full);
}

.nav-item.active .badge {
  background-color: var(--accent-color);
  color: white;
}

/* Category/Source lists */
.category-list, .source-list {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.source-list {
  max-height: 200px;
  overflow-y: auto;
}

.source-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 12px;
  border-radius: var(--border-radius-sm);
  font-size: 13px;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
  border: 1px solid transparent;
}

.source-item:hover {
  background-color: var(--bg-hover);
  color: var(--text-primary);
}

.source-item.active {
  background-color: rgba(99, 102, 241, 0.08);
  border-color: rgba(99, 102, 241, 0.2);
  color: var(--text-primary);
}

.source-item-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.source-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--text-muted);
  flex-shrink: 0;
}

.source-item.active .source-dot {
  background-color: var(--accent-color);
  box-shadow: 0 0 8px var(--accent-color);
}

.source-count {
  font-size: 10px;
  color: var(--text-muted);
  background-color: var(--bg-primary);
  padding: 1px 6px;
  border-radius: var(--border-radius-full);
}

/* Sidebar Footer */
.sidebar-footer {
  padding: 16px;
  border-top: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.theme-toggle-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  width: 100%;
  padding: 12px;
  border: 1px solid var(--border-color);
  background-color: var(--bg-primary);
  color: var(--text-secondary);
  border-radius: var(--border-radius-md);
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
}

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

html[data-theme="dark"] .theme-toggle-btn .dark-icon {
  display: block;
}
html[data-theme="dark"] .theme-toggle-btn .light-icon {
  display: none;
}
html[data-theme="light"] .theme-toggle-btn .dark-icon {
  display: none;
}
html[data-theme="light"] .theme-toggle-btn .light-icon {
  display: block;
}

.add-feed-shortcut-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  padding: 12px;
  border: none;
  background: var(--accent-gradient);
  color: white;
  border-radius: var(--border-radius-md);
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: opacity var(--transition-fast), transform var(--transition-fast);
  box-shadow: var(--shadow-sm);
}

.add-feed-shortcut-btn:hover {
  opacity: 0.95;
  transform: translateY(-1px);
}

.add-feed-shortcut-btn:active {
  transform: translateY(0);
}

/* ==========================================================================
   Main Content Layout
   ========================================================================== */

.app-main {
  flex-grow: 1;
  display: flex;
  flex-direction: column;
  height: 100%;
  overflow: hidden;
  position: relative;
}

/* Header Styling */
.app-header {
  height: var(--header-height);
  padding: 0 32px;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  background-color: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  z-index: 10;
  flex-shrink: 0;
}

.header-left {
  display: flex;
  align-items: center;
  gap: 16px;
}

.menu-toggle-btn {
  display: none;
}

.current-section-info h2 {
  font-size: 24px;
  letter-spacing: -0.5px;
  color: var(--text-primary);
}

.current-section-info p {
  font-size: 13px;
  color: var(--text-muted);
}

.header-right {
  display: flex;
  align-items: center;
  gap: 20px;
  flex-grow: 1;
  max-width: 700px;
  justify-content: flex-end;
}

/* Search Bar */
.search-bar {
  position: relative;
  width: 100%;
  max-width: 320px;
  display: flex;
  align-items: center;
}

.search-icon {
  position: absolute;
  left: 14px;
  color: var(--text-muted);
  pointer-events: none;
  font-size: 20px;
}

.search-bar input {
  width: 100%;
  padding: 10px 38px 10px 42px;
  border: 1px solid var(--border-color);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  border-radius: var(--border-radius-md);
  font-family: var(--font-sans);
  font-size: 14px;
  outline: none;
  transition: all var(--transition-fast);
}

.search-bar input:focus {
  border-color: var(--accent-color);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15);
}

.clear-search-btn {
  position: absolute;
  right: 12px;
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
}

.clear-search-btn:hover {
  color: var(--text-primary);
}

.clear-search-btn.hidden {
  display: none;
}

/* Controls (Dropdowns, buttons) */
.header-controls {
  display: flex;
  align-items: center;
  gap: 12px;
}

.control-select-wrapper {
  position: relative;
  display: flex;
  align-items: center;
}

.select-icon {
  position: absolute;
  left: 12px;
  color: var(--text-muted);
  pointer-events: none;
  font-size: 18px;
}

.control-select-wrapper select {
  padding: 10px 16px 10px 36px;
  border: 1px solid var(--border-color);
  background-color: var(--bg-primary);
  color: var(--text-secondary);
  border-radius: var(--border-radius-md);
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 500;
  outline: none;
  cursor: pointer;
  transition: all var(--transition-fast);
  appearance: none;
}

.control-select-wrapper select:focus,
.control-select-wrapper select:hover {
  border-color: var(--border-hover);
  color: var(--text-primary);
}

/* Global Buttons */
.icon-button {
  width: 40px;
  height: 40px;
  border-radius: var(--border-radius-md);
  border: 1px solid var(--border-color);
  background-color: var(--bg-primary);
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-fast);
}

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

.icon-button span {
  font-size: 20px;
}

.icon-button.active {
  color: var(--accent-color);
  border-color: var(--accent-color);
  background-color: var(--accent-light);
}

/* Sync animation */
.sync-btn.loading span {
  animation: spin 1s linear infinite;
  color: var(--accent-color);
}

@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

/* Feed Wrapper & Grid */
.feed-content-wrapper {
  flex-grow: 1;
  padding: 32px;
  overflow-y: auto;
  position: relative;
}

/* Active filters display */
.feed-active-filters {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
  background-color: var(--bg-secondary);
  padding: 10px 16px;
  border-radius: var(--border-radius-md);
  border: 1px solid var(--border-color);
}

.feed-active-filters.hidden {
  display: none !important;
}

.filter-label {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-muted);
}

.active-filter-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.filter-tag {
  display: flex;
  align-items: center;
  gap: 6px;
  background-color: var(--accent-light);
  color: var(--accent-color);
  padding: 4px 10px;
  border-radius: var(--border-radius-full);
  font-size: 11px;
  font-weight: 600;
  border: 1px solid rgba(99, 102, 241, 0.2);
}

.filter-tag button {
  background: none;
  border: none;
  color: var(--accent-color);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
}

.filter-tag button span {
  font-size: 14px;
}

.clear-all-filters-btn {
  margin-left: auto;
  background: none;
  border: none;
  color: var(--text-muted);
  font-family: var(--font-sans);
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  text-decoration: underline;
}

.clear-all-filters-btn:hover {
  color: var(--text-primary);
}

/* ==========================================================================
   News Feed Grid & Card Aesthetics
   ========================================================================== */

.news-grid {
  display: grid;
  gap: 24px;
  transition: opacity var(--transition-normal);
}

.news-grid.grid-view {
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
}

.news-grid.list-view {
  grid-template-columns: 1fr;
  max-width: 1000px;
  margin: 0 auto;
}

/* Premium News Card */
.news-card {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  height: 100%;
  cursor: pointer;
  transition: transform var(--transition-normal), border-color var(--transition-normal), box-shadow var(--transition-normal);
  position: relative;
}

.news-card:hover {
  transform: translateY(-4px);
  border-color: var(--glass-border);
  box-shadow: var(--shadow-md), var(--shadow-glow);
}

.news-card-image-wrapper {
  height: 180px;
  width: 100%;
  overflow: hidden;
  position: relative;
  background: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
  flex-shrink: 0;
}

.news-card-image-wrapper::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom, transparent 60%, rgba(0, 0, 0, 0.7) 100%);
}

.news-card-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

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

/* Fallback Card Graphic when no image available */
.news-card-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-tertiary) 100%);
  position: relative;
}

.news-card-placeholder-pattern {
  position: absolute;
  inset: 0;
  opacity: 0.05;
  background-image: radial-gradient(var(--text-primary) 1px, transparent 1px);
  background-size: 16px 16px;
}

.news-card-placeholder span {
  font-size: 40px;
  color: var(--text-muted);
  opacity: 0.3;
}

/* Card Badges */
.card-badges {
  position: absolute;
  top: 16px;
  left: 16px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  z-index: 2;
}

.badge-source {
  background-color: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  color: var(--text-primary);
  font-size: 11px;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: var(--border-radius-full);
  letter-spacing: -0.2px;
}

/* Card Body Content */
.news-card-body {
  padding: 20px;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.news-card-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  color: var(--text-muted);
  margin-bottom: 12px;
}

.news-card-meta-dot {
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background-color: var(--text-muted);
}

.news-card-title {
  font-size: 16px;
  color: var(--text-primary);
  margin-bottom: 10px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  font-weight: 600;
  line-height: 1.4;
  height: 44px; /* Fix height for cleaner alignment in grid */
  transition: color var(--transition-fast);
}

.news-card:hover .news-card-title {
  color: var(--accent-color);
}

.news-card-excerpt {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 20px;
  flex-grow: 1;
}

/* Card Footer Actions */
.news-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid var(--border-color);
  padding-top: 16px;
  margin-top: auto;
}

.read-time {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 12px;
  color: var(--text-muted);
}

.read-time span {
  font-size: 16px;
}

.card-actions {
  display: flex;
  gap: 6px;
}

.card-action-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  width: 32px;
  height: 32px;
  border-radius: var(--border-radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-fast);
}

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

.card-action-btn.active {
  color: var(--accent-color);
}

.card-action-btn span {
  font-size: 18px;
}

/* List View Card Alterations */
.news-grid.list-view .news-card {
  flex-direction: row;
  height: auto;
  align-items: stretch;
}

.news-grid.list-view .news-card-image-wrapper {
  width: 240px;
  height: auto;
  min-height: 160px;
}

.news-grid.list-view .news-card-title {
  height: auto;
  -webkit-line-clamp: 1;
  margin-bottom: 8px;
  font-size: 18px;
}

.news-grid.list-view .news-card-excerpt {
  margin-bottom: 12px;
}

.news-grid.list-view .news-card-footer {
  border-top: none;
  padding-top: 0;
}

/* ==========================================================================
   Skeleton Loading State
   ========================================================================== */

.skeleton-card {
  pointer-events: none;
}

.skeleton-image {
  width: 100%;
  height: 180px;
  background-color: var(--bg-tertiary);
  position: relative;
  overflow: hidden;
}

.skeleton-line {
  height: 12px;
  background-color: var(--bg-tertiary);
  border-radius: var(--border-radius-sm);
  margin-bottom: 10px;
  position: relative;
  overflow: hidden;
}

.skeleton-title-1 { width: 90%; height: 18px; }
.skeleton-title-2 { width: 70%; height: 18px; }
.skeleton-excerpt-1 { width: 100%; }
.skeleton-excerpt-2 { width: 95%; }
.skeleton-excerpt-3 { width: 40%; }
.skeleton-footer { display: flex; justify-content: space-between; align-items: center; margin-top: auto; }
.skeleton-footer-left { width: 30%; height: 14px; }
.skeleton-footer-right { width: 20%; height: 14px; }

.skeleton-image::after,
.skeleton-line::after,
.skeleton-footer-left::after,
.skeleton-footer-right::after {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  transform: translateX(-100%);
  background-image: linear-gradient(
    90deg,
    rgba(255, 255, 255, 0) 0%,
    rgba(255, 255, 255, 0.05) 20%,
    rgba(255, 255, 255, 0.1) 60%,
    rgba(255, 255, 255, 0) 100%
  );
  animation: shimmer 1.5s infinite;
}

html[data-theme="light"] .skeleton-image::after,
html[data-theme="light"] .skeleton-line::after {
  background-image: linear-gradient(
    90deg,
    rgba(0, 0, 0, 0) 0%,
    rgba(0, 0, 0, 0.03) 20%,
    rgba(0, 0, 0, 0.07) 60%,
    rgba(0, 0, 0, 0) 100%
  );
}

@keyframes shimmer {
  100% {
    transform: translateX(100%);
  }
}

/* ==========================================================================
   Modals & dialog Windows
   ========================================================================== */

.modal-dialog {
  border: none;
  background: none;
  margin: auto;
  outline: none;
  z-index: 1000;
  width: 100%;
  height: 100%;
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-normal);
}

.modal-dialog[open] {
  opacity: 1;
  pointer-events: auto;
}

.modal-backdrop {
  position: absolute;
  inset: 0;
  background-color: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(8px);
  z-index: 1;
}

.modal-content {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-lg);
  width: 90%;
  max-width: 700px;
  max-height: 85vh;
  z-index: 2;
  position: relative;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  transform: scale(0.95) translateY(10px);
  transition: transform var(--transition-normal);
}

.modal-dialog[open] .modal-content {
  transform: scale(1) translateY(0);
}

.modal-header {
  padding: 24px;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-shrink: 0;
}

.modal-header h2 {
  font-size: 20px;
  color: var(--text-primary);
}

.modal-body {
  padding: 24px;
  overflow-y: auto;
  flex-grow: 1;
}

.modal-footer {
  padding: 24px;
  border-top: 1px solid var(--border-color);
  display: flex;
  justify-content: flex-end;
  gap: 12px;
  background-color: rgba(0, 0, 0, 0.1);
  flex-shrink: 0;
}

/* Article view drawer details */
.article-modal .modal-content {
  max-width: 800px;
  height: 90vh;
  max-height: 90vh;
}

.article-meta-info {
  display: flex;
  align-items: center;
  gap: 12px;
}

.modal-source-badge {
  background-color: var(--accent-light);
  color: var(--accent-color);
  font-size: 12px;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: var(--border-radius-full);
}

.modal-date {
  font-size: 13px;
  color: var(--text-muted);
}

.modal-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.modal-title {
  font-size: 28px;
  line-height: 1.3;
  margin-bottom: 20px;
  letter-spacing: -0.5px;
  color: var(--text-primary);
}

.modal-image-wrapper {
  width: 100%;
  max-height: 360px;
  border-radius: var(--border-radius-md);
  overflow: hidden;
  margin-bottom: 24px;
  background-color: var(--bg-tertiary);
  border: 1px solid var(--border-color);
}

.modal-image-wrapper.hidden {
  display: none;
}

.modal-image-wrapper img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.modal-text-content {
  font-size: 16px;
  line-height: 1.8;
  color: var(--text-secondary);
}

.modal-text-content p {
  margin-bottom: 16px;
}

.read-original-btn {
  text-decoration: none;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

/* Button UI Components */
.primary-button, .secondary-button {
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 600;
  padding: 10px 20px;
  border-radius: var(--border-radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border: none;
}

.primary-button {
  background: var(--accent-gradient);
  color: white;
  box-shadow: var(--shadow-sm);
}

.primary-button:hover {
  opacity: 0.95;
  transform: translateY(-1px);
}

.primary-button:active {
  transform: translateY(0);
}

.secondary-button {
  background-color: var(--bg-primary);
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
}

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

.close-modal-btn {
  border: none;
  background: none;
}

/* Form Styles */
.form-content {
  max-width: 500px;
}

.modal-form {
  display: flex;
  flex-direction: column;
  gap: 20px;
  padding: 24px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.form-group label {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
}

.form-group label .required {
  color: #ef4444;
}

.form-group input, .form-group select {
  padding: 12px 14px;
  border: 1px solid var(--border-color);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  border-radius: var(--border-radius-md);
  font-family: var(--font-sans);
  font-size: 14px;
  outline: none;
  transition: border-color var(--transition-fast);
}

.form-group input:focus, .form-group select:focus {
  border-color: var(--accent-color);
}

.form-group .help-text {
  font-size: 11px;
  color: var(--text-muted);
}

.form-actions {
  display: flex;
  justify-content: flex-end;
  gap: 12px;
  margin-top: 8px;
}

/* Manage sources details */
.manage-desc {
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 20px;
}

.feeds-manager-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  max-height: 40vh;
  overflow-y: auto;
  padding-right: 4px;
}

.manager-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-md);
  transition: border-color var(--transition-fast);
}

.manager-item:hover {
  border-color: var(--border-hover);
}

.manager-item-info {
  display: flex;
  flex-direction: column;
  gap: 4px;
  overflow: hidden;
}

.manager-item-name {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.manager-item-url {
  font-size: 11px;
  color: var(--text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.manager-item-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.manager-category-badge {
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  background-color: var(--bg-tertiary);
  color: var(--text-secondary);
  padding: 2px 8px;
  border-radius: var(--border-radius-full);
}

.delete-feed-btn {
  background: none;
  border: none;
  color: #ef4444;
  cursor: pointer;
  padding: 4px;
  border-radius: var(--border-radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background-color var(--transition-fast);
}

.delete-feed-btn:hover {
  background-color: rgba(239, 68, 68, 0.1);
}

.delete-feed-btn span {
  font-size: 20px;
}

/* ==========================================================================
   Toast Notifications
   ========================================================================== */

.toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  padding: 14px 20px;
  border-radius: var(--border-radius-md);
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  gap: 12px;
  z-index: 2000;
  transition: transform var(--transition-normal), opacity var(--transition-normal);
  transform: translateY(0);
  opacity: 1;
}

.toast.hidden {
  transform: translateY(20px);
  opacity: 0;
  pointer-events: none;
}

.toast-icon {
  color: var(--accent-color);
}

.toast-success {
  background-color: var(--toast-success-bg);
  border-color: var(--toast-success-border);
}

.toast-success .toast-icon {
  color: var(--toast-success-text);
}

/* ==========================================================================
   Empty State
   ========================================================================== */

.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 80px 24px;
  text-align: center;
  max-width: 400px;
  margin: 0 auto;
}

.empty-state.hidden {
  display: none !important;
}

.empty-icon {
  font-size: 64px;
  color: var(--text-muted);
  opacity: 0.4;
  margin-bottom: 20px;
}

.empty-state h3 {
  font-size: 20px;
  margin-bottom: 8px;
}

.empty-state p {
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 24px;
}

.text-button-icon {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: color var(--transition-fast);
}

.text-button-icon:hover {
  color: var(--text-primary);
}

/* ==========================================================================
   Responsive Adaptation
   ========================================================================== */

@media (max-width: 1024px) {
  :root {
    --sidebar-width: 250px;
  }
  .app-header {
    padding: 0 24px;
  }
  .feed-content-wrapper {
    padding: 24px;
  }
}

@media (max-width: 768px) {
  /* Hide sidebar by default on mobile */
  .app-sidebar {
    position: fixed;
    top: 0;
    bottom: 0;
    left: 0;
    transform: translateX(-100%);
    box-shadow: var(--shadow-lg);
  }

  .app-sidebar.open {
    transform: translateX(0);
  }

  .close-sidebar-btn {
    display: flex;
  }

  /* Overlay */
  .sidebar-overlay {
    position: fixed;
    inset: 0;
    background-color: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    z-index: 99;
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-normal);
  }

  .sidebar-overlay.open {
    opacity: 1;
    pointer-events: auto;
  }

  .menu-toggle-btn {
    display: flex;
  }

  .app-header {
    height: 72px;
    padding: 0 16px;
  }

  .header-right {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background-color: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: 12px 16px;
    box-shadow: 0 -4px 12px rgba(0,0,0,0.15);
    max-width: none;
    z-index: 10;
    display: flex;
    justify-content: space-between;
    gap: 12px;
  }

  .search-bar {
    max-width: none;
    flex-grow: 1;
  }

  .header-controls {
    flex-shrink: 0;
  }

  .control-select-wrapper select {
    padding: 10px 12px 10px 30px;
    font-size: 12px;
  }
  .select-icon {
    left: 8px;
  }

  .feed-content-wrapper {
    padding: 16px 16px 80px 16px; /* space for sticky footer controls */
  }

  .news-grid.list-view .news-card {
    flex-direction: column;
  }
  
  .news-grid.list-view .news-card-image-wrapper {
    width: 100%;
    height: 180px;
  }
}