:root {
  --bg-color: #0b0f19;
  --card-bg: rgba(255, 255, 255, 0.05);
  --accent-color: #00d2ff;
  --accent-gradient: linear-gradient(135deg, #00d2ff 0%, #0053ff 100%);
  --text-main: #ffffff;
  --text-muted: #94a3b8;
  --glass-border: rgba(255, 255, 255, 0.1);
}

body {
  margin: 0;
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  background-color: var(--bg-color);
  color: var(--text-main);
  line-height: 1.5;
}

/* Barre de navigation (Glassmorphism) */
.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 2rem;
  background: rgba(11, 15, 25, 0.75);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--glass-border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.logo {
  font-weight: 800;
  font-size: 1.4rem;
  letter-spacing: -0.5px;
}

.logo span {
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.search-bar input {
  width: 320px;
  padding: 0.6rem 1.2rem;
  border-radius: 99px;
  border: 1px solid var(--glass-border);
  background: rgba(255, 255, 255, 0.05);
  color: #fff;
  outline: none;
  transition: all 0.3s ease;
}

.search-bar input:focus {
  border-color: var(--accent-color);
  box-shadow: 0 0 15px rgba(0, 210, 255, 0.3);
  width: 380px;
}

.btn-primary {
  background: var(--accent-gradient);
  color: #fff;
  border: none;
  padding: 0.6rem 1.4rem;
  border-radius: 99px;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 20px rgba(0, 210, 255, 0.4);
}

/* Grille de cartes vidéos */
.container {
  max-width: 1200px;
  margin: 2rem auto;
  padding: 0 1rem;
}

.section-title {
  font-size: 1.8rem;
  margin-bottom: 1.5rem;
}

.video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
}

.video-card {
  background: var(--card-bg);
  border: 1px solid var(--glass-border);
  border-radius: 16px;
  overflow: hidden;
  transition: transform 0.3s ease, border-color 0.3s ease;
  cursor: pointer;
}

.video-card:hover {
  transform: translateY(-6px);
  border-color: rgba(0, 210, 255, 0.5);
}

.thumbnail-wrapper {
  position: relative;
  width: 100%;
  padding-top: 56.25%; /* Ratio 16:9 */
  background: #1a2234;
}

.thumbnail-placeholder {
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background: linear-gradient(45deg, #1e293b, #0f172a);
}

.duration {
  position: absolute;
  bottom: 8px;
  right: 8px;
  background: rgba(0, 0, 0, 0.8);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.75rem;
  font-weight: 600;
}

.video-info {
  display: flex;
  gap: 0.8rem;
  padding: 1rem;
}

.avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--accent-gradient);
  flex-shrink: 0;
}

.video-title {
  font-size: 0.95rem;
  font-weight: 600;
  margin: 0 0 0.4rem 0;
  line-height: 1.3;
}

.channel-name {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin: 0;
}