/* CURATED - Main Stylesheet */
/* Modern, clean design with smooth animations */

/* ========================================
   Global Styles & Variables
   ======================================== */

:root {
  /* Colors */
  --bg-primary: #0f0f0f;
  --bg-secondary: #1a1a1a;
  --bg-tertiary: #242424;
  --bg-hover: #2a2a2a;
  --text-primary: #ffffff;
  --text-secondary: #aaaaaa;
  --text-tertiary: #888888;
  --accent-primary: #3ea6ff;
  --accent-hover: #65b8ff;
  --border-color: #333333;
  --success: #4ade80;
  --warning: #fbbf24;
  --error: #ef4444;
  
  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-xxl: 3rem;
  
  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  
  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-normal: 300ms ease;
  --transition-slow: 500ms ease;
  
  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.5);
  --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.6);
}

/* ========================================
   Base Styles
   ======================================== */

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

body {
  font-family: 'Lexend', sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
}

/* ========================================
   Header
   ======================================== */

.header {
  background-color: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  padding: var(--spacing-lg) var(--spacing-xl);
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(10px);
}

.header-content {
  max-width: 1600px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 25px;
}

.logo {
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: 2px;
  background: linear-gradient(135deg, var(--accent-primary), #8b5cf6);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  flex-shrink: 0;
}

.tagline {
  color: var(--text-secondary);
  font-size: 0.95rem;
  flex: 1;
}

.view-switcher {
  display: flex;
  gap: var(--spacing-sm);
  flex-shrink: 0;
  margin-left: auto;
}

.view-btn {
  padding: var(--spacing-sm) var(--spacing-lg);
  background-color: transparent;
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  cursor: pointer;
  font-size: 0.95rem;
  font-weight: 500;
  transition: all var(--transition-fast);
}

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

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

/* ========================================
   Main Container
   ======================================== */

.main-container {
  display: flex;
  max-width: 1600px;
  margin: 0 auto;
  padding: var(--spacing-xl);
  gap: var(--spacing-xl);
}

/* ========================================
   Sidebar
   ======================================== */

.sidebar {
  width: 280px;
  flex-shrink: 0;
  position: sticky;
  top: 120px;
  height: fit-content;
  max-height: calc(100vh - 140px);
  overflow-y: auto;
  background-color: var(--bg-secondary);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
}

.sidebar::-webkit-scrollbar {
  width: 8px;
}

.sidebar::-webkit-scrollbar-track {
  background: var(--bg-secondary);
}

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

.sidebar::-webkit-scrollbar-thumb:hover {
  background: var(--bg-hover);
}

.filter-section {
  margin-bottom: var(--spacing-xl);
}

.section-title {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: var(--spacing-md);
  color: var(--text-primary);
}

.clear-btn {
  width: 100%;
  padding: var(--spacing-sm);
  background-color: var(--bg-tertiary);
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  cursor: pointer;
  font-size: 0.85rem;
  margin-bottom: var(--spacing-lg);
  transition: all var(--transition-fast);
}

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

.filter-group {
  margin-bottom: var(--spacing-lg);
}

.filter-group-title {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-sm);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.filter-label {
  display: flex;
  align-items: center;
  padding: var(--spacing-sm);
  margin-bottom: var(--spacing-xs);
  cursor: pointer;
  border-radius: var(--radius-sm);
  transition: background-color var(--transition-fast);
}

.filter-label:hover {
  background-color: var(--bg-tertiary);
}

.filter-checkbox {
  margin-right: var(--spacing-sm);
  cursor: pointer;
  accent-color: var(--accent-primary);
}

.filter-name {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.filter-label:has(.filter-checkbox:checked) .filter-name {
  color: var(--text-primary);
  font-weight: 500;
}

.filter-category {
  position: relative;
  padding: var(--spacing-sm);
  margin-bottom: var(--spacing-md);
  border-radius: var(--radius-md);
  background-color: var(--bg-tertiary);
}

.subcategory-container {
  margin-left: var(--spacing-lg);
  margin-top: var(--spacing-sm);
  max-height: 1000px;
  overflow: hidden;
  transition: max-height 0.3s ease-out, opacity 0.3s ease-out;
  opacity: 1;
}

.subcategory-container.collapsed {
  max-height: 0;
  margin-top: 0;
  opacity: 0;
}

.subcategory-label {
  padding-left: var(--spacing-lg);
}

.hide-category-btn {
  position: absolute;
  top: var(--spacing-sm);
  right: var(--spacing-sm);
  width: 24px;
  height: 24px;
  background-color: var(--bg-hover);
  color: var(--text-tertiary);
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 1.2rem;
  line-height: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: all var(--transition-fast);
}

.filter-category:hover .hide-category-btn {
  opacity: 1;
}

.hide-category-btn:hover {
  background-color: var(--error);
  color: white;
}

.hidden-category-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-sm);
  margin-bottom: var(--spacing-sm);
  background-color: var(--bg-tertiary);
  border-radius: var(--radius-sm);
}

.unhide-btn {
  padding: var(--spacing-xs) var(--spacing-sm);
  background-color: var(--success);
  color: white;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 0.85rem;
  transition: opacity var(--transition-fast);
}

.unhide-btn:hover {
  opacity: 0.8;
}

.no-hidden {
  color: var(--text-tertiary);
  font-size: 0.85rem;
  text-align: center;
  padding: var(--spacing-md);
}

/* ========================================
   Content Area
   ======================================== */

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

.content-section {
  animation: fadeIn var(--transition-normal);
}

.content-section.hidden {
  display: none;
}

.section-header {
  margin-bottom: var(--spacing-xl);
}

.section-header h2 {
  font-size: 1.8rem;
  font-weight: 700;
  margin-bottom: var(--spacing-sm);
}

.video-count {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

/* ========================================
   Video Grid
   ======================================== */

.video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: var(--spacing-lg);
}

.loading,
.no-videos {
  grid-column: 1 / -1;
  text-align: center;
  padding: var(--spacing-xxl);
  color: var(--text-secondary);
  font-size: 1.1rem;
}

/* ========================================
   Video Card
   ======================================== */

.video-card {
  background-color: var(--bg-secondary);
  border-radius: var(--radius-lg);
  overflow: hidden;
  cursor: pointer;
  transition: all var(--transition-normal);
  position: relative;
}

.video-card:hover {
  transform: translateY(-8px) scale(1.03);
  box-shadow: var(--shadow-xl);
}

.video-card.marking-seen {
  animation: markSeen var(--transition-normal) forwards;
}

@keyframes markSeen {
  0% {
    opacity: 1;
    transform: scale(1);
  }
  100% {
    opacity: 0;
    transform: scale(0.8);
  }
}

.video-thumbnail {
  position: relative;
  width: 100%;
  padding-top: 56.25%; /* 16:9 aspect ratio */
  background-size: cover;
  background-position: center;
  background-color: var(--bg-tertiary);
  overflow: hidden;
}

.video-thumbnail.loading {
  animation: thumbnailPulsate 1.5s ease-in-out infinite;
}

@keyframes thumbnailPulsate {
  0%, 100% {
    background-color: var(--bg-tertiary);
  }
  50% {
    background-color: #1a1a1a;
  }
}

.play-overlay {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  opacity: 0;
  transition: opacity var(--transition-fast);
  pointer-events: none;
}

.video-card:hover .play-overlay {
  opacity: 0.9;
}

.duration-badge {
  position: absolute;
  bottom: var(--spacing-sm);
  right: var(--spacing-sm);
  background-color: rgba(0, 0, 0, 0.8);
  color: white;
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-weight: 600;
}

.action-btn {
  position: absolute;
  top: var(--spacing-sm);
  right: var(--spacing-sm);
  width: 36px;
  height: 36px;
  padding: 0;
  background-color: rgba(0, 0, 0, 0.8);
  color: white;
  border: 2px solid white;
  border-radius: 50%;
  cursor: pointer;
  font-size: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transform: scale(0.8);
  transition: all var(--transition-fast);
  z-index: 10;
  flex-shrink: 0;
}

.video-card:hover .action-btn {
  opacity: 1;
  transform: scale(1);
}

.action-btn:hover {
  background-color: var(--accent-primary);
  border-color: var(--accent-primary);
  transform: scale(1.1);
}

.video-info {
  padding: var(--spacing-md);
}

.video-title {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--spacing-xs);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  line-height: 1.4;
}

.video-channel {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.seen-date {
  font-size: 0.8rem;
  color: var(--text-tertiary);
  margin-top: var(--spacing-xs);
}

/* ========================================
   Tags Container
   ======================================== */

.tags-container {
  padding: var(--spacing-sm) var(--spacing-md);
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-xs);
  min-height: 44px;
  align-items: center;
}

.tag {
  display: inline-block;
  padding: var(--spacing-xs) var(--spacing-md);
  border-radius: 16px;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-primary);
  background-color: var(--bg-tertiary);
  border: 2px solid;
  transition: all var(--transition-fast);
  cursor: pointer;
}

.tag.category-tag {
  font-size: 0.75rem;
}

.tag.subcategory-tag {
  font-size: 0.7rem;
}

.tag:hover {
  color: white;
  transform: scale(1.05);
}

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

.series-info {
  background-color: rgba(62, 166, 255, 0.2);
  border: 1px solid var(--accent-primary);
  border-radius: var(--radius-md);
  padding: var(--spacing-sm);
  margin-top: var(--spacing-sm);
}

.series-name {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--accent-primary);
  margin-bottom: var(--spacing-xs);
}

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

/* ========================================
   Footer
   ======================================== */

.footer {
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: var(--spacing-xl);
  text-align: center;
  margin-top: var(--spacing-xxl);
}

.footer p {
  color: var(--text-tertiary);
  font-size: 0.85rem;
  margin-bottom: var(--spacing-sm);
}

.footer a {
  color: var(--accent-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.footer a:hover {
  color: var(--accent-hover);
}

/* ========================================
   Animations
   ======================================== */

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ========================================
   Responsive Design
   ======================================== */

@media (max-width: 1200px) {
  .video-grid {
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  }
}

@media (max-width: 968px) {
  .main-container {
    flex-direction: column;
  }
  
  .sidebar {
    width: 100%;
    position: relative;
    top: 0;
    max-height: none;
    margin-bottom: var(--spacing-xl);
  }
  
  .video-grid {
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: var(--spacing-md);
  }
}

@media (max-width: 640px) {
  .header {
    padding: var(--spacing-md);
  }
  
  .logo {
    font-size: 1.5rem;
  }
  
  .main-container {
    padding: var(--spacing-md);
  }
  
  .video-grid {
    grid-template-columns: 1fr;
  }
  
  .section-header h2 {
    font-size: 1.4rem;
  }
}

/* ========================================
   Utility Classes
   ======================================== */

.hidden {
  display: none !important;
}

/* ========================================
   Developer Tools Page Styles
   ======================================== */

.container {
    max-width: 1200px;
    margin: 0 auto;
}

.container h1 {
    font-size: 2rem;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, #3ea6ff, #8b5cf6);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.description {
    color: #aaaaaa;
    margin-bottom: 2rem;
    padding: 1rem;
    background-color: #1a1a1a;
    border-radius: 8px;
    border-left: 4px solid #3ea6ff;
}

.section {
    background-color: #1a1a1a;
    border-radius: 12px;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
}

.section h2 {
    font-size: 1.3rem;
    margin-bottom: 1rem;
    color: #3ea6ff;
}

label {
    display: block;
    margin-bottom: 0.5rem;
    color: #aaaaaa;
    font-size: 0.9rem;
    font-weight: 500;
}

textarea,
input[type="text"] {
    width: 100%;
    padding: 1rem;
    background-color: #242424;
    border: 1px solid #333333;
    border-radius: 8px;
    color: #ffffff;
    font-family: 'Courier New', monospace;
    font-size: 0.9rem;
    resize: vertical;
    margin-bottom: 1rem;
}

textarea:focus,
input[type="text"]:focus {
    outline: none;
    border-color: #3ea6ff;
}

button {
    padding: 0.75rem 1.5rem;
    background-color: #3ea6ff;
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 600;
    transition: all 0.2s;
}

button:hover {
    background-color: #65b8ff;
    transform: translateY(-2px);
}

button:disabled {
    background-color: #333333;
    color: #666666;
    cursor: not-allowed;
    transform: none;
}

.button-group {
    display: flex;
    gap: 1rem;
    margin-bottom: 1rem;
}

.status {
    padding: 1rem;
    border-radius: 8px;
    margin-bottom: 1rem;
    display: none;
}

.status.info {
    background-color: rgba(62, 166, 255, 0.1);
    border: 1px solid #3ea6ff;
    color: #3ea6ff;
}

.status.success {
    background-color: rgba(74, 222, 128, 0.1);
    border: 1px solid #4ade80;
    color: #4ade80;
}

.status.error {
    background-color: rgba(239, 68, 68, 0.1);
    border: 1px solid #ef4444;
    color: #ef4444;
}

.status.show {
    display: block;
}

#output {
    min-height: 400px;
    max-height: 600px;
    overflow-y: auto;
}

#output::-webkit-scrollbar {
    width: 8px;
}

#output::-webkit-scrollbar-track {
    background: #1a1a1a;
}

#output::-webkit-scrollbar-thumb {
    background: #333333;
    border-radius: 4px;
}

.copy-btn {
    background-color: #4ade80;
    margin-top: 1rem;
}

.copy-btn:hover {
    background-color: #6ee7b7;
}

.progress {
    margin-top: 1rem;
    height: 8px;
    background-color: #242424;
    border-radius: 4px;
    overflow: hidden;
    display: none;
}

.progress.show {
    display: block;
}

.progress-bar {
    height: 100%;
    background: linear-gradient(90deg, #3ea6ff, #8b5cf6);
    width: 0%;
    transition: width 0.3s ease;
}

.instructions {
    background-color: #242424;
    padding: 1rem;
    border-radius: 8px;
    margin-bottom: 1rem;
}

.instructions h3 {
    color: #3ea6ff;
    margin-bottom: 0.5rem;
    font-size: 1rem;
}

.instructions ul {
    margin-left: 1.5rem;
    color: #aaaaaa;
}

.instructions li {
    margin-bottom: 0.25rem;
}

code {
    background-color: #242424;
    padding: 0.2rem 0.4rem;
    border-radius: 4px;
    font-family: 'Courier New', monospace;
    color: #3ea6ff;
}

a {
    color: #3ea6ff;
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}