:root {
  color-scheme: dark;
  --bg: #05060a;
  --surface: #0b0d14;
  --surface-2: #121524;
  --accent: #6ee7ff;
  --accent-2: #e879f9;
  --text: #f4f7ff;
  --muted: #99a1c3;
  --glow: rgba(110, 231, 255, 0.35);
  font-family: 'Space Grotesk', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

* {
  box-sizing: border-box;
}

body.theme-dark {
  margin: 0;
  background: radial-gradient(circle at 10% 20%, rgba(110, 231, 255, 0.08), transparent 45%),
              radial-gradient(circle at 90% 10%, rgba(232, 121, 249, 0.12), transparent 55%),
              var(--bg);
  color: var(--text);
}

.app-shell {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  padding: 1.5rem;
  gap: 1rem;
}

.app-header,
.app-footer {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid rgba(255, 255, 255, 0.05);
  border-radius: 1rem;
  padding: 1rem 1.5rem;
  backdrop-filter: blur(16px);
}

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

.logo-mark {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #05060a;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 0.75rem;
  display: grid;
  place-items: center;
  font-weight: 700;
}

.app-nav {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  margin-top: 0.75rem;
}

.nav-link {
  color: var(--muted);
  text-decoration: none;
  position: relative;
  padding-bottom: 0.25rem;
}

.nav-link::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s ease;
}

.nav-link:hover::after {
  transform: scaleX(1);
}

#app {
  flex: 1;
}

.page-renderer {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.page-intro {
  background: rgba(255, 255, 255, 0.02);
  border-radius: 1.5rem;
  padding: 2rem;
  border: 1px solid rgba(255, 255, 255, 0.05);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.45);
}

.eyebrow {
  letter-spacing: 0.2em;
  text-transform: uppercase;
  font-size: 0.75rem;
  color: var(--muted);
}

.lead {
  color: var(--muted);
  max-width: 60ch;
}

.metric-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 1rem;
  margin: 1.5rem 0;
}

.metric-card {
  background: var(--surface);
  border-radius: 1rem;
  padding: 1rem;
  border: 1px solid rgba(255, 255, 255, 0.05);
  box-shadow: inset 0 0 40px rgba(110, 231, 255, 0.05);
}

.metric-value {
  font-size: 1.75rem;
  font-weight: 600;
}

.metric-label {
  color: var(--muted);
}

.metric-delta {
  color: var(--accent);
  font-size: 0.85rem;
}

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

.section-block {
  background: rgba(255, 255, 255, 0.015);
  border-radius: 1.5rem;
  padding: 2rem;
  border: 1px solid rgba(255, 255, 255, 0.04);
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.35);
}

.hero-block {
  display: grid;
  gap: 2rem;
}

.highlight-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 1rem;
  margin: 1.5rem 0;
}

.highlight-card {
  background: var(--surface);
  padding: 1rem;
  border-radius: 1rem;
  border: 1px solid rgba(255, 255, 255, 0.05);
  animation: pulse 6s ease infinite;
}

.highlight-value {
  font-size: 1.5rem;
  font-weight: 600;
}

.hero-visual {
  position: relative;
  min-height: 220px;
  border-radius: 1.25rem;
  background: radial-gradient(circle, rgba(110, 231, 255, 0.08), transparent 60%);
  border: 1px solid rgba(255, 255, 255, 0.04);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 1.5rem;
}

.orbital-layer {
  position: absolute;
  inset: 10%;
  border: 1px dashed rgba(110, 231, 255, 0.2);
  border-radius: 50%;
  animation: orbit 12s linear infinite;
}

.orbital-layer:nth-child(2) { inset: 20%; animation-duration: 16s; }
.orbital-layer:nth-child(3) { inset: 30%; animation-duration: 20s; }
.orbital-layer:nth-child(4) { inset: 40%; animation-duration: 24s; }

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.5rem;
}

.data-card {
  background: linear-gradient(145deg, rgba(110, 231, 255, 0.08), rgba(232, 121, 249, 0.05));
  padding: 1.25rem;
  border-radius: 1.25rem;
  border: 1px solid rgba(255, 255, 255, 0.05);
}

.card-value {
  font-size: 2rem;
  font-weight: 600;
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: 0.8rem;
}

.tag-list span {
  background: rgba(255, 255, 255, 0.08);
  border-radius: 999px;
  padding: 0.2rem 0.8rem;
  font-size: 0.75rem;
}

.graph-panel {
  margin-top: 2rem;
}

.bar-chart {
  display: flex;
  gap: 1rem;
  align-items: flex-end;
  min-height: 160px;
}

.bar {
  flex: 1;
  background: linear-gradient(180deg, var(--accent), var(--accent-2));
  border-radius: 1rem 1rem 0 0;
  position: relative;
  animation: grow 2.4s ease forwards;
}

.bar span {
  position: absolute;
  bottom: -1.5rem;
  width: 100%;
  text-align: center;
  font-size: 0.75rem;
}

.timeline {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  margin-top: 1.5rem;
}

.timeline-item {
  display: grid;
  grid-template-columns: 90px 1fr;
  gap: 1rem;
}

.timeline-year {
  font-size: 1.5rem;
  font-weight: 600;
}

.timeline-body {
  padding-left: 1rem;
  border-left: 2px dashed rgba(255, 255, 255, 0.1);
}

.visual-panels,
.multiverse-grid,
.reference-list {
  display: grid;
  gap: 1rem;
}

.visual-card,
.universe-card,
.reference-card {
  background: var(--surface-2);
  border-radius: 1rem;
  padding: 1.25rem;
  border: 1px solid rgba(255, 255, 255, 0.04);
}

.line-chart {
  margin-top: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.line-point {
  background: rgba(110, 231, 255, 0.12);
  border-radius: 999px;
  padding: 0.45rem 1rem;
  display: flex;
  justify-content: space-between;
}

.universe-probability {
  font-size: 2rem;
  font-weight: 600;
  color: var(--accent);
}

.module-stack {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.module-card {
  background: rgba(255, 255, 255, 0.02);
  border-radius: 1.25rem;
  padding: 1.5rem;
  border: 1px solid rgba(255, 255, 255, 0.04);
}

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

.reference-type,
.reference-link {
  color: var(--muted);
  font-size: 0.85rem;
}

.app-footer {
  text-align: center;
}

@media (min-width: 900px) {
  .hero-block {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    align-items: center;
  }

  .visual-panels {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .multiverse-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .reference-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@keyframes pulse {
  0% { box-shadow: 0 0 0 0 var(--glow); }
  70% { box-shadow: 0 0 30px 10px transparent; }
  100% { box-shadow: 0 0 0 0 transparent; }
}

@keyframes orbit {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

@keyframes grow {
  from { transform: scaleY(0); }
  to { transform: scaleY(1); }
}

@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}