:root {
  --bg: oklch(0.98 0.01 95);
  --panel: oklch(0.995 0.006 95);
  --panel-strong: oklch(0.93 0.03 85);
  --text: oklch(0.23 0.03 40);
  --muted: oklch(0.55 0.03 45);
  --line: oklch(0.88 0.02 80);
  --brand: oklch(0.66 0.15 55);
  --brand-2: oklch(0.76 0.1 140);
  --shadow: 0 20px 60px color-mix(in oklab, var(--brand) 10%, transparent);
  --radius-lg: 28px;
  --radius-md: 18px;
  --radius-sm: 12px;
  --font-sans: "Space Grotesk", system-ui, sans-serif;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  font-family: var(--font-sans);
  color: var(--text);
  background:
    radial-gradient(circle at top left, color-mix(in oklab, var(--brand) 16%, transparent), transparent 30%),
    radial-gradient(circle at top right, color-mix(in oklab, var(--brand-2) 20%, transparent), transparent 24%),
    linear-gradient(180deg, oklch(0.97 0.02 96), oklch(0.99 0.01 92));
}

a {
  color: inherit;
  text-decoration: none;
}

button,
input {
  font: inherit;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.site-shell {
  width: min(1180px, calc(100% - 2rem));
  margin: 0 auto;
  padding: 1rem 0 3rem;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-top: 1rem;
  padding: 1rem 1.1rem;
  background: color-mix(in oklab, white 80%, transparent);
  border: 1px solid color-mix(in oklab, var(--line) 80%, white);
  border-radius: 999px;
  backdrop-filter: blur(18px);
  box-shadow: var(--shadow);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.9rem;
}

.brand strong,
.brand small {
  display: block;
}

.brand small {
  color: var(--muted);
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 3rem;
  height: 3rem;
  border-radius: 1rem;
  font-weight: 700;
  color: white;
  background: linear-gradient(135deg, var(--brand), var(--brand-2));
}

.topbar-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.search input {
  width: min(420px, 78vw);
  padding: 0.95rem 1rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: color-mix(in oklab, white 88%, transparent);
  outline: none;
  transition: border-color 180ms ease, transform 180ms ease;
}

.search input:focus {
  border-color: var(--brand);
  transform: translateY(-1px);
}

.app {
  display: grid;
  gap: 1.5rem;
  padding-top: 1.5rem;
}

.hero {
  display: grid;
  grid-template-columns: 1.4fr 0.8fr;
  gap: 1rem;
  padding: 1.2rem;
}

.hero-copy,
.hero-stats,
.panel,
.video-card,
.module-card,
.player-card,
.empty-state {
  background: color-mix(in oklab, var(--panel) 90%, white);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
}

.hero-copy {
  padding: 2rem;
}

.eyebrow {
  margin: 0 0 0.75rem;
  color: var(--brand);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.hero h1 {
  margin: 0;
  font-size: clamp(2.2rem, 5vw, 4.5rem);
  line-height: 0.98;
  max-width: 10ch;
}

.hero-text {
  max-width: 48ch;
  color: var(--muted);
  font-size: 1.05rem;
}

.hero-stats {
  display: grid;
  gap: 1rem;
  padding: 1rem;
}

.stat-card {
  display: grid;
  gap: 0.25rem;
  padding: 1.4rem;
  border-radius: var(--radius-md);
  background: linear-gradient(180deg, color-mix(in oklab, var(--panel-strong) 65%, white), white);
}

.stat-value {
  font-size: clamp(2rem, 4vw, 3.25rem);
  font-weight: 700;
}

.stat-label {
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.82rem;
}

.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.65rem;
  color: var(--muted);
  font-size: 0.95rem;
}

.breadcrumb-link {
  color: var(--text);
}

.grid {
  display: grid;
  gap: 1rem;
}

.module-grid {
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.module-card {
  display: grid;
  gap: 0.9rem;
  padding: 1.2rem;
  transition: transform 180ms ease, border-color 180ms ease;
}

.module-card:hover,
.video-card:hover {
  transform: translateY(-4px);
  border-color: color-mix(in oklab, var(--brand) 35%, var(--line));
}

.module-card-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
}

.module-badge,
.video-index {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 2.4rem;
  height: 2.4rem;
  padding: 0 0.75rem;
  border-radius: 999px;
  background: color-mix(in oklab, var(--brand) 18%, white);
  color: color-mix(in oklab, var(--brand) 82%, black);
  font-weight: 700;
}

.module-card h2,
.panel h2,
.player-card h2 {
  margin: 0;
  font-size: 1.1rem;
}

.module-card p,
.video-card p,
.panel p {
  margin: 0;
  color: var(--muted);
}

.module-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  color: var(--muted);
  font-size: 0.92rem;
}

.panel {
  padding: 1.25rem;
}

.video-list {
  display: grid;
  gap: 0.9rem;
}

.section-block {
  display: grid;
  gap: 0.85rem;
}

.section-title {
  margin: 0.5rem 0 0;
  font-size: 1rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.video-card {
  display: grid;
  gap: 0.75rem;
  padding: 1rem;
}

.video-card-top {
  display: flex;
  align-items: flex-start;
  gap: 0.9rem;
}

.video-card h3 {
  margin: 0 0 0.35rem;
  font-size: 1.04rem;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0.8rem 1rem;
  border: 0;
  border-radius: 999px;
  cursor: pointer;
  transition: transform 150ms ease, filter 150ms ease;
}

.button:hover {
  transform: translateY(-1px);
  filter: saturate(1.05);
}

.button-primary {
  color: white;
  background: linear-gradient(135deg, var(--brand), color-mix(in oklab, var(--brand) 68%, black));
}

.button-secondary {
  color: var(--text);
  background: color-mix(in oklab, var(--panel-strong) 45%, white);
}

.player-card {
  overflow: hidden;
}

.player-head {
  display: grid;
  gap: 1rem;
  padding: 1.4rem;
}

.player-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  color: var(--muted);
}

.player-note {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.player-frame {
  background: #111;
}

.player-frame video {
  display: block;
  width: 100%;
  max-height: min(72vh, 780px);
  background: #111;
}

.split {
  display: grid;
  grid-template-columns: 1.3fr 0.7fr;
  gap: 1rem;
}

.empty-state {
  padding: 2rem;
  text-align: center;
}

@media (max-width: 900px) {
  .hero,
  .split {
    grid-template-columns: 1fr;
  }

  .topbar {
    border-radius: 1.25rem;
  }
}

@media (max-width: 640px) {
  .site-shell {
    width: min(100% - 1rem, 1180px);
  }

  .hero-copy,
  .panel,
  .video-card,
  .module-card,
  .player-head,
  .empty-state {
    padding: 1rem;
  }

  .search input {
    width: 100%;
  }

  .topbar-actions,
  .search {
    width: 100%;
  }
}