/* Design Tokens and Variables */
:root {
  /* Dark Theme Default */
  --bg-primary: #080d1a;
  --bg-secondary: #111a2e;
  --bg-tertiary: #1b2640;
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --border-color: #1e2d4d;
  --border-hover: #2e4370;
  --accent-color: #38bdf8;
  --accent-glow: rgba(56, 189, 248, 0.15);
  --accent-gradient: linear-gradient(135deg, #0ea5e9 0%, #6366f1 100%);
  --accent-secondary: #818cf8;
  /* Status Colors */
  --color-feature: #10b981;
  --color-feature-bg: rgba(16, 185, 129, 0.1);
  --color-issue: #f43f5e;
  --color-issue-bg: rgba(244, 63, 94, 0.1);
  --color-deprecated: #f97316;
  --color-deprecated-bg: rgba(249, 115, 22, 0.1);
  --color-general: #8b5cf6;
  --color-general-bg: rgba(139, 92, 246, 0.1);
  --color-announcement: #a855f7;
  --color-announcement-bg: rgba(168, 85, 247, 0.1);
  --color-breaking: #fb7185;
  --color-breaking-bg: rgba(251, 113, 133, 0.1);
  --color-change: #94a3b8;
  --color-change-bg: rgba(148, 163, 184, 0.1);

  /* Fonts */
  --font-display: 'Outfit', 'Plus Jakarta Sans', sans-serif;
  --font-body: 'Plus Jakarta Sans', sans-serif;
  
  /* Layout */
  --sidebar-width: 320px;
  --header-height: 80px;
  --border-radius-sm: 8px;
  --border-radius-md: 12px;
  --border-radius-lg: 18px;
  --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.15);
  --shadow-md: 0 8px 20px rgba(0, 0, 0, 0.25);
  --shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.4);
}

:root.light-theme {
  --bg-primary: #f8fafc;
  --bg-secondary: #ffffff;
  --bg-tertiary: #f1f5f9;
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  --border-color: #e2e8f0;
  --border-hover: #cbd5e1;
  --accent-color: #0284c7;
  --accent-glow: rgba(2, 132, 199, 0.1);
  --accent-gradient: linear-gradient(135deg, #0284c7 0%, #4f46e5 100%);
  --accent-secondary: #4f46e5;
  
  /* Status Colors */
  --color-feature: #059669;
  --color-feature-bg: rgba(5, 150, 105, 0.08);
  --color-issue: #dc2626;
  --color-issue-bg: rgba(220, 38, 38, 0.08);
  --color-deprecated: #ea580c;
  --color-deprecated-bg: rgba(234, 88, 12, 0.08);
  --color-general: #7c3aed;
  --color-general-bg: rgba(124, 58, 237, 0.08);
  --color-announcement: #6d28d9;
  --color-announcement-bg: rgba(109, 40, 217, 0.08);
  --color-breaking: #be123c;
  --color-breaking-bg: rgba(190, 18, 60, 0.08);
  --color-change: #475569;
  --color-change-bg: rgba(71, 85, 105, 0.08);
  
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 8px 20px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.12);
}

/* Global Reset & Base */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-body);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  transition: background-color 0.3s ease, color 0.3s ease;
}

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

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

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

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

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.9rem;
  padding: 10px 18px;
  border-radius: var(--border-radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  transition: var(--transition-smooth);
  user-select: none;
}

.btn-primary {
  background: var(--accent-gradient);
  color: #ffffff;
  box-shadow: 0 4px 12px rgba(14, 165, 233, 0.25);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(14, 165, 233, 0.35);
}

.btn-outline {
  background: transparent;
  border-color: var(--border-color);
  color: var(--text-primary);
}

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

.btn-accent {
  background: #000000;
  color: #ffffff;
  border: 1px solid rgba(255, 255, 255, 0.15);
}

.dark-theme .btn-accent {
  background: #ffffff;
  color: #000000;
}

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

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

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

.btn-icon {
  width: 42px;
  height: 42px;
  padding: 0;
  border-radius: 50%;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
}

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

.btn-sm {
  padding: 6px 12px;
  font-size: 0.8rem;
  border-radius: var(--border-radius-sm);
}

.hidden {
  display: none !important;
}

/* Header styling */
.app-header {
  height: var(--header-height);
  background: rgba(17, 26, 46, 0.8);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 100;
  transition: var(--transition-smooth);
}

.light-theme .app-header {
  background: rgba(255, 255, 255, 0.8);
}

.header-container {
  max-width: 1440px;
  height: 100%;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

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

.app-logo {
  width: 36px;
  height: 36px;
  color: var(--accent-color);
  filter: drop-shadow(0 0 8px rgba(56, 189, 248, 0.3));
}

.title-wrapper h1 {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.025em;
  line-height: 1.2;
}

.subtitle {
  font-size: 0.75rem;
  color: var(--text-secondary);
}

.actions-area {
  display: flex;
  align-items: center;
  gap: 16px;
}

.status-indicator {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8rem;
  color: var(--text-secondary);
  background: var(--bg-tertiary);
  padding: 6px 12px;
  border-radius: 20px;
  border: 1px solid var(--border-color);
}

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

.status-dot.green {
  background-color: var(--color-feature);
  box-shadow: 0 0 8px var(--color-feature);
}

.status-dot.spinning {
  background-color: var(--accent-color);
  box-shadow: 0 0 8px var(--accent-color);
  animation: pulse 1.5s infinite ease-in-out;
}

/* Layout Setup */
.app-layout {
  display: flex;
  flex: 1;
  max-width: 1440px;
  width: 100%;
  margin: 0 auto;
  padding: 24px;
  gap: 24px;
}

/* Sidebar styling */
.sidebar {
  width: var(--sidebar-width);
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.sidebar-section {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-lg);
  padding: 20px;
  box-shadow: var(--shadow-sm);
}

.sidebar-section h3 {
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 14px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-secondary);
}

/* Search Box */
.search-box {
  position: relative;
}

.search-box input {
  width: 100%;
  padding: 12px 40px 12px 14px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-md);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 0.9rem;
  outline: none;
  transition: var(--transition-smooth);
}

.search-box input:focus {
  border-color: var(--accent-color);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.search-icon {
  position: absolute;
  right: 14px;
  top: 50%;
  transform: translateY(-50%);
  width: 18px;
  height: 18px;
  color: var(--text-secondary);
  pointer-events: none;
}

/* Filters */
.filter-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.pill {
  background: var(--bg-tertiary);
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
  padding: 8px 14px;
  border-radius: 20px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.8rem;
  cursor: pointer;
  transition: var(--transition-smooth);
}

.pill:hover {
  color: var(--text-primary);
  border-color: var(--border-hover);
}

.pill.active {
  background: var(--accent-color);
  border-color: var(--accent-color);
  color: #080d1a;
  box-shadow: 0 4px 10px rgba(56, 189, 248, 0.2);
}

/* Stats panel */
.stats-panel {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.stat-card {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-md);
  padding: 12px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.stat-num {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 800;
}

.stat-label {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.sidebar-footer {
  margin-top: auto;
  padding: 10px;
  text-align: center;
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* Feed Section */
.feed-section {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 16px;
  min-width: 0; /* Prevents overflow */
}

.feed-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 4px;
}

.feed-header h2 {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.feed-actions {
  display: flex;
  gap: 8px;
}

/* Notes Grid/List */
.notes-container {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

/* Release Card Design */
.note-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-lg);
  padding: 20px;
  position: relative;
  overflow: hidden;
  transition: var(--transition-smooth);
  display: flex;
  flex-direction: column;
  gap: 12px;
  cursor: pointer;
  box-shadow: var(--shadow-sm);
}

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

.note-card.selected {
  border-color: var(--accent-color);
  box-shadow: 0 0 0 1px var(--accent-color), var(--shadow-md);
}

/* Card Header */
.note-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 12px;
}

.note-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

/* Tags styles based on update type */
.note-tag {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 4px 8px;
  border-radius: 4px;
}

.note-tag.feature {
  background: var(--color-feature-bg);
  color: var(--color-feature);
}

.note-tag.issue {
  background: var(--color-issue-bg);
  color: var(--color-issue);
}

.note-tag.deprecated {
  background: var(--color-deprecated-bg);
  color: var(--color-deprecated);
}

.note-tag.general {
  background: var(--color-general-bg);
  color: var(--color-general);
}

.note-tag.announcement {
  background: var(--color-announcement-bg);
  color: var(--color-announcement);
}

.note-tag.breaking {
  background: var(--color-breaking-bg);
  color: var(--color-breaking);
}

.note-tag.change {
  background: var(--color-change-bg);
  color: var(--color-change);
}

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

/* Selection check circle */
.selection-checkbox {
  position: relative;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  border: 2px solid var(--border-color);
  background: transparent;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: var(--transition-smooth);
}

.note-card:hover .selection-checkbox {
  border-color: var(--text-secondary);
}

.note-card.selected .selection-checkbox {
  background: var(--accent-color);
  border-color: var(--accent-color);
}

.selection-checkbox::after {
  content: '';
  width: 6px;
  height: 10px;
  border: solid #080d1a;
  border-width: 0 2px 2px 0;
  transform: rotate(45deg);
  position: absolute;
  top: 2px;
  opacity: 0;
  transition: var(--transition-smooth);
}

.note-card.selected .selection-checkbox::after {
  opacity: 1;
}

/* Content Area */
.note-content {
  font-size: 0.95rem;
  line-height: 1.6;
  color: var(--text-secondary);
}

.note-content p {
  margin-bottom: 12px;
}

.note-content p:last-child {
  margin-bottom: 0;
}

.note-content a {
  color: var(--accent-color);
  text-decoration: none;
  font-weight: 500;
  border-bottom: 1px dashed var(--accent-color);
  transition: var(--transition-smooth);
}

.note-content a:hover {
  border-bottom-style: solid;
}

.note-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 16px 0;
  font-size: 0.9rem;
}

.note-content th, .note-content td {
  border: 1px solid var(--border-color);
  padding: 8px 12px;
  text-align: left;
}

.note-content th {
  background-color: var(--bg-tertiary);
  font-family: var(--font-display);
  font-weight: 600;
}

.note-content ul, .note-content ol {
  margin: 12px 0 12px 20px;
}

.note-content li {
  margin-bottom: 6px;
}

/* Card Actions */
.note-footer {
  display: flex;
  justify-content: flex-end;
  border-top: 1px solid var(--border-color);
  padding-top: 14px;
  margin-top: 4px;
  gap: 12px;
}

.card-action-btn {
  background: transparent;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.8rem;
  font-weight: 600;
  font-family: var(--font-display);
  transition: var(--transition-smooth);
  padding: 6px 12px;
  border-radius: var(--border-radius-sm);
}

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

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

.card-action-btn.tweet-btn:hover {
  background: rgba(56, 189, 248, 0.08);
}

.twitter-icon {
  width: 14px;
  height: 14px;
  fill: currentColor;
}

/* Floating bottom selection bar */
.selection-bar {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background: rgba(17, 26, 46, 0.9);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-color);
  padding: 14px 24px;
  border-radius: var(--border-radius-lg);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  box-shadow: var(--shadow-lg);
  z-index: 90;
  opacity: 0;
  pointer-events: none;
  transition: transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275), opacity 0.3s ease;
  width: calc(100% - 48px);
  max-width: 600px;
}

.selection-bar:not(.hidden) {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
  pointer-events: auto;
}

.selection-info {
  font-family: var(--font-display);
  font-size: 0.95rem;
}

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

/* Skeletons loading */
.skeleton-container {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.skeleton-card {
  height: 180px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-lg);
  position: relative;
  overflow: hidden;
}

.skeleton-card::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.04), transparent);
  animation: shimmer 1.5s infinite;
}

.light-theme .skeleton-card::after {
  background: linear-gradient(90deg, transparent, rgba(0, 0, 0, 0.04), transparent);
}

/* Modals & Dialog styling */
.custom-modal {
  border: none;
  background: transparent;
  padding: 0;
  max-width: 550px;
  width: calc(100% - 32px);
  margin: auto;
  outline: none;
}

.custom-modal::backdrop {
  background-color: rgba(4, 7, 15, 0.8);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.modal-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  max-height: 85vh;
}

.modal-header {
  padding: 20px;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.modal-header h3 {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 700;
}

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

.modal-close-btn {
  background: transparent;
  border: none;
  font-size: 1.8rem;
  color: var(--text-secondary);
  cursor: pointer;
  line-height: 1;
  transition: var(--transition-smooth);
}

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

.modal-body {
  padding: 20px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.modal-footer {
  padding: 16px 20px;
  background: var(--bg-tertiary);
  border-top: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

/* Tweet Composer Styles */
.template-selector-container {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.template-selector-container select {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  padding: 8px 12px;
  border-radius: var(--border-radius-sm);
  color: var(--text-primary);
  font-family: var(--font-body);
  outline: none;
  cursor: pointer;
  transition: var(--transition-smooth);
}

.template-selector-container select:focus {
  border-color: var(--accent-color);
}

#tweet-textarea {
  width: 100%;
  height: 120px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-md);
  padding: 14px;
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 0.95rem;
  line-height: 1.5;
  resize: none;
  outline: none;
  transition: var(--transition-smooth);
}

#tweet-textarea:focus {
  border-color: var(--accent-color);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.character-counter-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.8rem;
}

.character-progress {
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--text-secondary);
}

.progress-ring-indicator {
  transform: rotate(-90deg);
  transform-origin: 50% 50%;
  transition: stroke-dashoffset 0.1s;
}

.char-warning {
  color: var(--color-issue);
  font-weight: 600;
}

.tweet-preview-box {
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-md);
  padding: 16px;
  background: rgba(0, 0, 0, 0.1);
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.light-theme .tweet-preview-box {
  background: rgba(0, 0, 0, 0.02);
}

.tweet-preview-header {
  display: flex;
  align-items: center;
  gap: 10px;
}

.twitter-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--accent-gradient);
}

.twitter-names {
  display: flex;
  flex-direction: column;
}

.display-name {
  font-size: 0.85rem;
  font-weight: 700;
  line-height: 1.2;
}

.user-handle {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.tweet-preview-body {
  font-size: 0.95rem;
  line-height: 1.5;
  white-space: pre-wrap;
  word-break: break-word;
}

/* Detail modal body */
.note-details-full {
  font-size: 0.95rem;
  line-height: 1.7;
}

.note-details-full p {
  margin-bottom: 16px;
}

.note-details-full table {
  width: 100%;
  border-collapse: collapse;
  margin: 20px 0;
}

.note-details-full th, .note-details-full td {
  border: 1px solid var(--border-color);
  padding: 10px 14px;
}

.note-details-full th {
  background: var(--bg-tertiary);
  font-family: var(--font-display);
  font-weight: 600;
}

.external-link-icon {
  width: 14px;
  height: 14px;
}

/* Notification Toast styling */
.toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background: #10b981;
  color: #ffffff;
  padding: 12px 24px;
  border-radius: var(--border-radius-md);
  box-shadow: var(--shadow-lg);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.9rem;
  z-index: 200;
  transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275), opacity 0.3s;
  transform: translateY(0);
}

.toast.hidden {
  transform: translateY(100px);
  opacity: 0;
  pointer-events: none;
}

/* Empty View & Error View */
.empty-state, .error-view {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 60px 20px;
  text-align: center;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-lg);
  gap: 16px;
  margin-top: 10px;
}

.empty-icon, .error-icon {
  width: 48px;
  height: 48px;
  color: var(--text-muted);
}

.error-icon {
  color: var(--color-issue);
}

.empty-state h3, .error-view h3 {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
}

.empty-state p, .error-view p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  max-width: 380px;
}

/* Top loading bar */
.loading-bar {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  background: var(--accent-gradient);
  width: 0%;
  z-index: 200;
  transition: width 0.4s ease;
}

.loading-bar.loading {
  width: 90%;
  animation: loading-pulse 2s infinite ease-in-out;
}

.loading-bar.done {
  width: 100%;
}

/* Animations */
@keyframes shimmer {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(100%); }
}

@keyframes pulse {
  0% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.2); opacity: 0.7; }
  100% { transform: scale(1); opacity: 1; }
}

@keyframes loading-pulse {
  0% { opacity: 0.6; }
  50% { opacity: 1; }
  100% { opacity: 0.6; }
}

.refresh-icon.spinning {
  animation: spin 1s linear infinite;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

/* Responsive Breakpoints */
@media (max-width: 992px) {
  .app-layout {
    flex-direction: column;
    padding: 16px;
  }
  
  .sidebar {
    width: 100%;
  }
}

@media (max-width: 576px) {
  header {
    height: auto;
    padding: 12px 0;
  }
  
  .header-container {
    flex-direction: column;
    gap: 12px;
    align-items: stretch;
  }
  
  .actions-area {
    justify-content: space-between;
  }
  
  .selection-bar {
    flex-direction: column;
    gap: 12px;
    align-items: stretch;
    text-align: center;
  }
}

/* Theme Slider Switch Styles */
.theme-switch-container {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  padding: 6px 12px;
  border-radius: 20px;
}

.theme-switch-container svg {
  width: 16px;
  height: 16px;
  color: var(--text-muted);
  transition: var(--transition-smooth);
}

/* Toggle highlights based on active theme */
html:not(.light-theme) .moon-icon {
  color: var(--accent-color);
  filter: drop-shadow(0 0 4px rgba(56, 189, 248, 0.4));
}

html.light-theme .sun-icon {
  color: #eab308; /* yellow accent */
  filter: drop-shadow(0 0 4px rgba(234, 179, 8, 0.4));
}

.switch {
  position: relative;
  display: inline-block;
  width: 38px;
  height: 20px;
}

.switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  transition: .3s;
  border-radius: 20px;
}

.slider:before {
  position: absolute;
  content: "";
  height: 12px;
  width: 12px;
  left: 3px;
  bottom: 3px;
  background-color: var(--text-secondary);
  transition: .3s;
  border-radius: 50%;
}

input:checked + .slider {
  background-color: var(--accent-color);
  border-color: var(--accent-color);
}

input:checked + .slider:before {
  transform: translateX(18px);
  background-color: #080d1a;
}