/* ============================================
   Best Circuit — Dark Editorial Theme
   Typography: Syne (display) + Outfit (body)
   ============================================ */

/* Reset */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --bg-deep: #06060c;
  --bg-surface: #0c0c14;
  --bg-card: #111119;
  --bg-card-hover: #16162a;
  --accent: #e8964a;
  --accent-dim: rgba(232, 150, 74, 0.10);
  --accent-glow: rgba(232, 150, 74, 0.20);
  --text: #e4e2dd;
  --text-muted: #7a7a8e;
  --text-dim: #4a4a5e;
  --border: rgba(255, 255, 255, 0.06);
  --border-hover: rgba(232, 150, 74, 0.25);
  --transition: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  --font-display: 'Unbounded', sans-serif;
  --font-body: 'Outfit', sans-serif;
}

body {
  font-family: var(--font-body);
  line-height: 1.6;
  color: var(--text);
  background-color: var(--bg-deep);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Scrollbar */
::-webkit-scrollbar {
  width: 6px;
}

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

::-webkit-scrollbar-thumb {
  background: var(--text-dim);
  border-radius: 3px;
}

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

/* Focus */
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* Noise grain overlay */
.grain {
  position: fixed;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  pointer-events: none;
  z-index: 9999;
  opacity: 0.028;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 512 512' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.75' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  background-repeat: repeat;
  background-size: 256px 256px;
}

/* ---- Header ---- */
.site-header {
  background: var(--bg-surface);
  color: var(--text);
  padding: 5rem 2rem 4.5rem;
  text-align: center;
  position: relative;
  border-bottom: 1px solid var(--border);
  overflow: hidden;
}

/* Ambient glow behind header */
.site-header::before {
  content: '';
  position: absolute;
  top: -20%;
  left: 50%;
  transform: translateX(-50%);
  width: 700px;
  height: 500px;
  background: radial-gradient(ellipse, var(--accent-dim) 0%, transparent 70%);
  pointer-events: none;
}

.header-label {
  display: inline-block;
  font-family: var(--font-body);
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1.25rem;
  position: relative;
}

.site-header h1 {
  font-family: var(--font-display);
  font-size: 3.6rem;
  font-weight: 800;
  margin-bottom: 0.75rem;
  letter-spacing: -0.02em;
  line-height: 1;
  position: relative;
}

.tagline {
  font-size: 1rem;
  font-weight: 300;
  color: var(--text-muted);
  letter-spacing: 0.02em;
  position: relative;
}

/* ---- Container ---- */
.container {
  max-width: 1320px;
  margin: 0 auto;
  padding: 3.5rem 2rem;
}

/* ---- Video Grid ---- */
.video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.5rem;
}

/* ---- Video Card ---- */
.video-card {
  background: var(--bg-card);
  border-radius: 8px;
  overflow: hidden;
  border: 1px solid var(--border);
  cursor: pointer;
  display: flex;
  flex-direction: column;
  opacity: 0;
  transform: translateY(16px);
  transition:
    opacity 0.5s var(--transition),
    transform var(--transition),
    border-color var(--transition),
    box-shadow var(--transition),
    background var(--transition);
}

.video-card.revealed {
  opacity: 1;
  transform: translateY(0);
}

.video-card.revealed:hover {
  transform: translateY(-3px);
  border-color: var(--border-hover);
  box-shadow:
    0 8px 30px rgba(0, 0, 0, 0.5),
    0 0 60px var(--accent-dim);
  background: var(--bg-card-hover);
}

/* ---- Thumbnail ---- */
.video-thumbnail {
  position: relative;
  width: 100%;
  padding-top: 56.25%;
  background: #000;
  overflow: hidden;
}

.video-thumbnail img {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition), filter var(--transition);
  filter: brightness(0.82) saturate(0.9);
}

.video-card.revealed:hover .video-thumbnail img {
  transform: scale(1.04);
  filter: brightness(1) saturate(1);
}

/* Play overlay — frosted circle replacing the YouTube red button */
.play-overlay {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) scale(0.9);
  width: 54px;
  height: 54px;
  transition:
    opacity var(--transition),
    transform var(--transition);
  opacity: 0;
  background: rgba(0, 0, 0, 0.45);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(255, 255, 255, 0.12);
}

/* Hide the default YouTube SVG */
.play-overlay svg {
  display: none;
}

/* Custom triangle play icon */
.play-overlay::after {
  content: '';
  display: block;
  width: 0;
  height: 0;
  border-style: solid;
  border-width: 9px 0 9px 16px;
  border-color: transparent transparent transparent var(--text);
  margin-left: 3px;
}

.video-card.revealed:hover .play-overlay {
  opacity: 1;
  transform: translate(-50%, -50%) scale(1);
}

/* Duration badge */
.video-duration {
  position: absolute;
  bottom: 10px;
  right: 10px;
  background: rgba(0, 0, 0, 0.78);
  color: var(--text);
  padding: 3px 7px;
  border-radius: 4px;
  font-size: 0.72rem;
  font-weight: 500;
  font-family: var(--font-body);
  letter-spacing: 0.04em;
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
}

/* ---- Video Info ---- */
.video-info {
  padding: 1.2rem 1.25rem 1.3rem;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.video-title {
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 0.35rem;
  color: var(--text);
  line-height: 1.45;
}

.video-description {
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.55;
  flex: 1;
  margin-bottom: 0.5rem;
  font-weight: 300;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.video-channel {
  font-size: 0.78rem;
  color: var(--text-dim);
  font-weight: 400;
  margin-top: auto;
  letter-spacing: 0.01em;
  display: flex;
  align-items: center;
  gap: 6px;
}

.video-channel::before {
  content: '';
  display: inline-block;
  width: 4px;
  height: 4px;
  background: var(--accent);
  border-radius: 50%;
  flex-shrink: 0;
}

/* ---- No videos state ---- */
.no-videos {
  text-align: center;
  padding: 5rem 2rem;
  color: var(--text-muted);
  font-size: 1rem;
  grid-column: 1 / -1;
  font-weight: 300;
}

.no-videos code {
  background: var(--bg-card);
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  font-family: 'SF Mono', 'Fira Code', 'Cascadia Code', monospace;
  color: var(--accent);
  font-size: 0.85rem;
  border: 1px solid var(--border);
}

/* ---- Footer ---- */
.site-footer {
  text-align: center;
  padding: 2.5rem 2rem;
  color: var(--text-dim);
  font-size: 0.78rem;
  border-top: 1px solid var(--border);
  font-weight: 300;
  letter-spacing: 0.03em;
}

/* ---- Modal ---- */
.modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 10000;
  align-items: center;
  justify-content: center;
}

.modal.active {
  display: flex;
  animation: modalIn 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

@keyframes modalIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

.modal-backdrop {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.92);
  cursor: pointer;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}

.modal-content {
  position: relative;
  z-index: 10001;
  max-width: 90vw;
  max-height: 90vh;
  width: 100%;
  margin: auto;
}

.modal-close {
  position: absolute;
  top: -3rem;
  right: 0;
  background: transparent;
  border: none;
  color: var(--text-dim);
  font-size: 2rem;
  cursor: pointer;
  width: 2.5rem;
  height: 2.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: color var(--transition), background var(--transition);
  line-height: 1;
  border-radius: 50%;
}

.modal-close:hover {
  color: var(--text);
  background: rgba(255, 255, 255, 0.06);
}

.modal-video-container {
  position: relative;
  width: 100%;
  padding-top: 56.25%;
  background: #000;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.5);
}

.modal-video-container iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border: none;
}

/* ---- Responsive ---- */
@media (max-width: 768px) {
  .site-header {
    padding: 3.5rem 1.5rem 3rem;
  }

  .site-header h1 {
    font-size: 2.8rem;
  }

  .tagline {
    font-size: 0.9rem;
  }

  .video-grid {
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 1.25rem;
  }

  .container {
    padding: 2.5rem 1.25rem;
  }

  .modal-content {
    max-width: 95vw;
  }

  .modal-close {
    top: -2.5rem;
    font-size: 1.75rem;
  }
}

@media (max-width: 480px) {
  .video-grid {
    grid-template-columns: 1fr;
    gap: 1.25rem;
  }

  .site-header {
    padding: 2.75rem 1rem 2.25rem;
  }

  .site-header h1 {
    font-size: 2.2rem;
  }

  .header-label {
    font-size: 0.6rem;
    letter-spacing: 0.25em;
  }
}

/* Respect reduced motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }

  .video-card {
    opacity: 1;
    transform: none;
  }
}