:root {
  --bg-color: #0f172a;
  --glass-bg: rgba(30, 41, 59, 0.7);
  --glass-border: rgba(255, 255, 255, 0.1);
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --accent-color: #3b82f6;
  --accent-hover: #60a5fa;
  --danger: #ef4444;
  --success: #10b981;
}

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  background-color: var(--bg-color);
  color: var(--text-primary);
  min-height: 100vh;
  padding: 2rem;
  background-image: 
    radial-gradient(circle at 15% 50%, rgba(59, 130, 246, 0.15), transparent 25%),
    radial-gradient(circle at 85% 30%, rgba(239, 68, 68, 0.1), transparent 25%);
}

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

header {
  text-align: center;
  margin-bottom: 3rem;
}

h1 {
  font-size: 2.5rem;
  font-weight: 800;
  margin-bottom: 1rem;
  background: linear-gradient(to right, #60a5fa, #a78bfa);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.search-container {
  display: flex;
  justify-content: center;
  margin-bottom: 2rem;
}

.search-box {
  display: flex;
  width: 100%;
  max-width: 600px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 9999px;
  padding: 0.5rem;
  backdrop-filter: blur(10px);
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  transition: all 0.3s ease;
}

.search-box:focus-within {
  border-color: var(--accent-color);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.3);
}

.search-box input {
  flex: 1;
  background: transparent;
  border: none;
  color: var(--text-primary);
  font-size: 1.1rem;
  padding: 0.5rem 1rem;
  outline: none;
}

.search-box button {
  background: var(--accent-color);
  color: white;
  border: none;
  border-radius: 9999px;
  padding: 0.5rem 1.5rem;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s;
}

.search-box button:hover {
  background: var(--accent-hover);
}

.filters-panel {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 1rem;
  padding: 1.5rem;
  margin-bottom: 2rem;
  backdrop-filter: blur(10px);
  display: flex;
  flex-wrap: wrap;
  gap: 2rem;
}

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

.filter-group label {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.filter-options {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.chip {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--glass-border);
  padding: 0.5rem 1rem;
  border-radius: 9999px;
  cursor: pointer;
  font-size: 0.9rem;
  transition: all 0.2s;
  user-select: none;
}

.chip:hover {
  background: rgba(255, 255, 255, 0.1);
}

.chip.active {
  background: var(--accent-color);
  border-color: var(--accent-color);
  color: white;
  font-weight: 500;
}

.table-container {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 1rem;
  padding: 1px; /* for border gradient effect */
  overflow: hidden;
  backdrop-filter: blur(10px);
}

.table-wrapper {
  overflow-x: auto;
  border-radius: calc(1rem - 1px);
  background: var(--glass-bg);
}

table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
}

th, td {
  padding: 1rem;
  border-bottom: 1px solid var(--glass-border);
}

th {
  color: var(--text-secondary);
  font-weight: 600;
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  white-space: nowrap;
}

th.sortable {
  cursor: pointer;
  transition: color 0.2s;
}

th.sortable:hover {
  color: var(--text-primary);
}

th.sortable::after {
  content: ' \2195'; /* Up/down arrow */
  opacity: 0.3;
  margin-left: 0.25rem;
}

th.sortable.asc::after {
  content: ' \2191';
  opacity: 1;
  color: var(--accent-color);
}

th.sortable.desc::after {
  content: ' \2193';
  opacity: 1;
  color: var(--accent-color);
}

tbody tr {
  transition: background 0.2s;
}

tbody tr:hover {
  background: rgba(255, 255, 255, 0.05);
}

tbody tr:last-child td {
  border-bottom: none;
}

.video-cell {
  display: flex;
  align-items: center;
  gap: 1rem;
  min-width: 300px;
}

.thumbnail {
  width: 120px;
  height: 68px;
  border-radius: 0.5rem;
  object-fit: cover;
  background-color: #000;
  flex-shrink: 0;
  box-shadow: 0 2px 4px rgba(0,0,0,0.2);
}

.video-info {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.video-title {
  font-weight: 600;
  font-size: 1rem;
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

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

.duration-badge {
  display: inline-block;
  background: rgba(0,0,0,0.7);
  color: white;
  padding: 0.1rem 0.3rem;
  border-radius: 0.25rem;
  font-size: 0.75rem;
  margin-top: 0.25rem;
  width: fit-content;
}

.metric-cell {
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.empty-state {
  text-align: center;
  padding: 4rem 2rem;
  color: var(--text-secondary);
}

@media (max-width: 768px) {
  .filters-panel {
    flex-direction: column;
    gap: 1.5rem;
  }
}