:root {
  color-scheme: dark;
  --bg: #000005;
  --ink: #e0e6ff;
  --accent: #7b8fff;
  --accent-hover: #a4b4ff;
  --card: rgba(10, 10, 30, 0.8);
  --card-hover: rgba(20, 20, 50, 0.85);
  --border: rgba(100, 120, 255, 0.15);
  --shadow: rgba(80, 100, 255, 0.1);
  --link-hover: rgba(123, 143, 255, 0.08);
}

/* ── full-screen hyperspace starfield (GPU-composited) ── */
body {
  background: #000005;
  position: relative;
}

body::before,
body::after {
  content: '';
  position: fixed;
  inset: -50%;
  width: 200%;
  height: 200%;
  pointer-events: none;
  z-index: 0;
  will-change: transform;
}

/* Layer 1 — fast white streaking stars */
body::before {
  background:
    radial-gradient(1.5px 1.5px at  5%  8%, #fff 50%, transparent 100%),
    radial-gradient(1px   1px   at 12% 22%, #dde 50%, transparent 100%),
    radial-gradient(1.5px 1.5px at 20% 45%, #fff 50%, transparent 100%),
    radial-gradient(1px   1px   at 28% 67%, #ccf 50%, transparent 100%),
    radial-gradient(1.5px 1.5px at 35% 15%, #fff 50%, transparent 100%),
    radial-gradient(1px   1px   at 42% 88%, #eef 50%, transparent 100%),
    radial-gradient(1.5px 1.5px at 50% 35%, #fff 50%, transparent 100%),
    radial-gradient(1px   1px   at 58% 72%, #ddf 50%, transparent 100%),
    radial-gradient(1.5px 1.5px at 65% 52%, #fff 50%, transparent 100%),
    radial-gradient(1px   1px   at 72% 10%, #ccf 50%, transparent 100%),
    radial-gradient(1.5px 1.5px at 80% 92%, #fff 50%, transparent 100%),
    radial-gradient(1px   1px   at 88% 38%, #eef 50%, transparent 100%),
    radial-gradient(1.5px 1.5px at 95% 60%, #fff 50%, transparent 100%),
    radial-gradient(1px   1px   at 18% 55%, #ddf 50%, transparent 100%),
    radial-gradient(1.5px 1.5px at 45% 95%, #fff 50%, transparent 100%),
    radial-gradient(1px   1px   at 68% 82%, #ccf 50%, transparent 100%),
    radial-gradient(1.5px 1.5px at 85% 25%, #fff 50%, transparent 100%),
    radial-gradient(1px   1px   at  3% 42%, #eef 50%, transparent 100%),
    radial-gradient(1.5px 1.5px at 62% 5%,  #fff 50%, transparent 100%);
  background-size: 50% 50%;
  opacity: 0.9;
  animation: hyperDrift1 20s linear infinite;
}

/* Layer 2 — bigger blue/white stars, slightly slower */
body::after {
  background:
    radial-gradient(2.5px 2.5px at 10% 15%, #a4b4ff 40%, transparent 100%),
    radial-gradient(3px   3px   at 25% 50%, #c4d0ff 40%, transparent 100%),
    radial-gradient(2.5px 2.5px at 40% 80%, #8b9eff 40%, transparent 100%),
    radial-gradient(3px   3px   at 55% 25%, #bbc8ff 40%, transparent 100%),
    radial-gradient(2.5px 2.5px at 70% 65%, #a4b4ff 40%, transparent 100%),
    radial-gradient(3px   3px   at 85% 40%, #c4d0ff 40%, transparent 100%),
    radial-gradient(2.5px 2.5px at 15% 90%, #8b9eff 40%, transparent 100%),
    radial-gradient(3px   3px   at 48% 55%, #bbc8ff 40%, transparent 100%),
    radial-gradient(2.5px 2.5px at 60% 10%, #a4b4ff 40%, transparent 100%),
    radial-gradient(3px   3px   at 33% 35%, #dde4ff 40%, transparent 100%);
  background-size: 50% 50%;
  opacity: 0.7;
  animation: hyperDrift2 35s linear infinite;
}

/* GPU-friendly: animate transform (compositor-only, no repaints) */
@keyframes hyperDrift1 {
  from { transform: translate3d(0, 0, 0); }
  to   { transform: translate3d(-50%, -50%, 0); }
}

@keyframes hyperDrift2 {
  from { transform: translate3d(0, 0, 0); }
  to   { transform: translate3d(-50%, -50%, 0); }
}

/* Respect user's reduced-motion preference */
@media (prefers-reduced-motion: reduce) {
  body::before,
  body::after {
    animation: none;
  }
}

/* Card floats above the starfield */
.card {
  position: relative;
  z-index: 1;
  max-width: 720px;
  padding: 48px;
  border-radius: 20px;
  background: var(--card);
  border: 1px solid var(--border);
  box-shadow:
    0 0 40px rgba(80, 100, 255, 0.08),
    0 0 80px rgba(80, 100, 255, 0.04);
  backdrop-filter: blur(16px);
  animation: cardAppear 700ms cubic-bezier(0.16, 1, 0.3, 1) both;
}

h1 {
  font-size: 2.8rem;
  font-weight: 700;
  text-align: center;
  letter-spacing: -0.02em;
  color: transparent;
  background: linear-gradient(135deg, #7b8fff 0%, #c4d0ff 50%, #a4b4ff 100%);
  -webkit-background-clip: text;
  background-clip: text;
  text-shadow: none;
}

.subtitle {
  color: #7a84b0;
  text-align: center;
}

h2 {
  color: #7b8fff;
  display: flex;
  align-items: center;
  gap: 12px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.8rem;
}

h2::before,
h2::after {
  content: '';
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border), transparent);
}

.link-card {
  background: rgba(15, 15, 40, 0.6);
  border: 1px solid var(--border);
  border-radius: 14px;
  transition: all 280ms cubic-bezier(0.16, 1, 0.3, 1);
  position: relative;
  overflow: hidden;
  box-shadow: 3px 3px 0 rgba(80, 100, 255, 0.1);
}

.link-card:hover {
  background: rgba(25, 25, 60, 0.7);
  border-color: var(--accent);
  transform: translate(-2px, -2px);
  box-shadow:
    5px 5px 0 var(--accent),
    0 0 20px rgba(123, 143, 255, 0.15);
}

.link-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 3px;
  height: 100%;
  background: linear-gradient(180deg, #7b8fff, #a4b4ff);
  transform: scaleY(0);
  transition: transform 280ms cubic-bezier(0.16, 1, 0.3, 1);
  transform-origin: bottom;
}

.link-card:hover::before {
  transform: scaleY(1);
}

.link-icon {
  border-radius: 10px;
}

.link-content strong {
  color: var(--ink);
}

.link-content p {
  color: #7a84b0;
}

.boost-badge {
  background: linear-gradient(135deg, #7b8fff 0%, #a4b4ff 100%);
  color: #05050f;
  font-weight: 700;
  box-shadow: 0 2px 10px rgba(123, 143, 255, 0.3);
}

.info-section {
  border-top: 1px solid var(--border);
}

.info-section summary {
  color: #7a84b0;
  transition: color 200ms;
}

.info-section summary:hover {
  color: var(--accent);
}

.info-section ul {
  color: #7a84b0;
}

.info-section code {
  background: rgba(123, 143, 255, 0.12);
  color: var(--accent);
}

@keyframes cardAppear {
  from {
    opacity: 0;
    transform: translateY(24px) scale(0.97);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

@media (max-width: 768px) {
  .card {
    padding: 32px 24px;
  }
  h1 {
    font-size: 2.2rem;
  }
}

@media (max-width: 480px) {
  .card {
    padding: 24px 20px;
  }
  h1 {
    font-size: 1.8rem;
  }
  .link-card {
    padding: 14px 16px;
    gap: 12px;
  }
  .link-icon {
    width: 36px;
    height: 36px;
  }
}