:root {
  --space-black: #04050f;
  --space-midnight: #121a3a;
  --scanline: rgba(245, 248, 255, 0.07);
  --star: #edf3ff;
  --neon-cyan: #67e8ff;
  --neon-gold: #ffd873;
  --card-bg: rgba(3, 8, 30, 0.72);
  --card-border: #67e8ff;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--star);
  font-family: "Space Mono", monospace;
  background:
    radial-gradient(
      circle at 10% 10%,
      rgba(103, 232, 255, 0.15),
      transparent 30%
    ),
    radial-gradient(
      circle at 90% 15%,
      rgba(255, 216, 115, 0.12),
      transparent 25%
    ),
    radial-gradient(
      circle at 50% 120%,
      rgba(162, 124, 255, 0.12),
      transparent 45%
    ),
    linear-gradient(170deg, var(--space-black) 0%, var(--space-midnight) 100%);
  overflow-x: hidden;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    radial-gradient(2px 2px at 15% 20%, #fff, transparent),
    radial-gradient(1.5px 1.5px at 35% 80%, #fff, transparent),
    radial-gradient(2px 2px at 80% 25%, #fff, transparent),
    radial-gradient(1.5px 1.5px at 70% 60%, #fff, transparent),
    linear-gradient(var(--scanline) 1px, transparent 1px);
  background-size:
    auto,
    auto,
    auto,
    auto,
    100% 4px;
  opacity: 0.45;
  animation: drift 16s linear infinite;
}

.home-shell {
  width: min(1100px, 92vw);
  margin: 0 auto;
  min-height: 100vh;
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  gap: 2rem;
  align-items: center;
  padding: 2.5rem 0;
}

.hero-card {
  background: var(--card-bg);
  border: 2px solid var(--card-border);
  box-shadow:
    0 0 0 2px rgba(103, 232, 255, 0.2),
    0 0 48px rgba(103, 232, 255, 0.22);
  border-radius: 22px;
  padding: clamp(1.4rem, 4vw, 2.2rem);
  animation: riseIn 0.8s ease-out;
}

.eyebrow {
  margin: 0;
  color: var(--neon-gold);
  text-transform: uppercase;
  letter-spacing: 0.22rem;
  font-size: 0.72rem;
}

h1 {
  margin: 0.65rem 0 0;
  font-size: clamp(2rem, 6vw, 3.9rem);
  line-height: 1;
  font-family: "Orbitron", sans-serif;
  text-transform: uppercase;
  text-shadow: 0 0 14px rgba(103, 232, 255, 0.5);
}

.subtitle {
  margin: 1rem 0 1.5rem;
  font-size: clamp(0.95rem, 2.8vw, 1.08rem);
  line-height: 1.55;
}

.play-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 170px;
  padding: 0.8rem 1.25rem;
  border-radius: 999px;
  color: #021023;
  background: linear-gradient(90deg, var(--neon-gold), #fffa9b);
  text-decoration: none;
  font-weight: 700;
  font-size: 0.95rem;
  letter-spacing: 0.08rem;
  text-transform: uppercase;
  box-shadow: 0 0 18px rgba(255, 216, 115, 0.52);
  transition:
    transform 0.2s ease,
    box-shadow 0.2s ease;
}

.play-button:hover,
.play-button:focus-visible {
  transform: translateY(-2px) scale(1.02);
  box-shadow: 0 0 22px rgba(255, 216, 115, 0.7);
}

.bust-panel {
  position: relative;
  display: grid;
  place-items: center;
  min-height: 420px;
  animation: riseIn 1s ease-out 0.12s both;
}

.halo {
  position: absolute;
  width: min(70vw, 430px);
  aspect-ratio: 1;
  border-radius: 50%;
  background: radial-gradient(
    circle,
    rgba(103, 232, 255, 0.24),
    transparent 62%
  );
}

.einstein-bust-image {
  width: min(72vw, 360px);
  height: auto;
  image-rendering: pixelated;
  image-rendering: crisp-edges;
  border: 2px solid rgba(103, 232, 255, 0.38);
  border-radius: 0.75rem;
  background: rgba(3, 8, 30, 0.5);
  filter: drop-shadow(0 16px 32px rgba(0, 0, 0, 0.45));
}

@media (max-width: 900px) {
  .home-shell {
    grid-template-columns: 1fr;
    gap: 1rem;
    padding: 1.4rem 0 2.2rem;
  }

  .hero-card {
    order: 2;
  }

  .bust-panel {
    order: 1;
    min-height: 290px;
  }

  .einstein-bust-image {
    width: min(78vw, 300px);
  }
}

@keyframes drift {
  from {
    transform: translateY(0);
  }
  to {
    transform: translateY(4px);
  }
}

@keyframes riseIn {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}