:root {
  color-scheme: dark;
  --ink: #f8f7ff;
  --muted: #c4c1dc;
  --panel: rgba(24, 19, 55, 0.72);
  --line: rgba(188, 176, 255, 0.22);
  --violet: #9c7cff;
  --aqua: #63f3df;
  --coral: #ff668f;
  --night: #080617;
}

* {
  box-sizing: border-box;
}

html {
  background: var(--night);
  font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.6;
}

body {
  min-height: 100vh;
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 15% 10%, rgba(99, 243, 223, 0.14), transparent 32rem),
    radial-gradient(circle at 85% 20%, rgba(156, 124, 255, 0.18), transparent 38rem),
    radial-gradient(circle at 50% 100%, rgba(255, 102, 143, 0.12), transparent 34rem),
    var(--night);
}

a {
  color: var(--aqua);
  text-underline-offset: 0.2em;
}

a:hover {
  color: #b7fff5;
}

.shell {
  width: min(100% - 2rem, 70rem);
  margin: 0 auto;
}

header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.25rem 0;
}

.brand {
  color: var(--ink);
  font-size: 0.95rem;
  font-weight: 800;
  letter-spacing: 0.18em;
  text-decoration: none;
}

nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem;
}

nav a {
  color: var(--muted);
  font-size: 0.88rem;
  text-decoration: none;
}

main {
  padding: 4rem 0 6rem;
}

.hero {
  min-height: 60vh;
  display: grid;
  align-items: center;
  grid-template-columns: 1.25fr 0.75fr;
  gap: 3rem;
}

.eyebrow {
  margin: 0 0 0.8rem;
  color: var(--aqua);
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.2em;
  text-transform: uppercase;
}

h1 {
  max-width: 13ch;
  margin: 0;
  font-size: clamp(3rem, 10vw, 7.5rem);
  line-height: 0.94;
  letter-spacing: -0.055em;
}

.lead {
  max-width: 42rem;
  margin: 1.5rem 0 0;
  color: var(--muted);
  font-size: clamp(1rem, 2.4vw, 1.25rem);
}

.prism {
  width: min(68vw, 18rem);
  aspect-ratio: 1;
  justify-self: center;
  transform: rotate(45deg);
  border: 1px solid rgba(255, 255, 255, 0.4);
  border-radius: 30%;
  background:
    linear-gradient(135deg, rgba(99, 243, 223, 0.9), transparent 45%),
    linear-gradient(315deg, rgba(255, 102, 143, 0.85), transparent 48%),
    linear-gradient(45deg, #7560ff, #171033);
  box-shadow:
    0 0 5rem rgba(156, 124, 255, 0.35),
    inset 0 0 2.5rem rgba(255, 255, 255, 0.2);
}

.content {
  width: min(100%, 48rem);
}

.content h1 {
  max-width: none;
  font-size: clamp(2.4rem, 8vw, 4.8rem);
  line-height: 1;
}

.content h2 {
  margin-top: 2.8rem;
  font-size: 1.35rem;
}

.content p,
.content li {
  color: var(--muted);
}

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

.card {
  margin-top: 2rem;
  padding: clamp(1.25rem, 4vw, 2rem);
  border: 1px solid var(--line);
  border-radius: 1.5rem;
  background: var(--panel);
  backdrop-filter: blur(18px);
}

.button {
  display: inline-flex;
  margin-top: 0.7rem;
  padding: 0.8rem 1rem;
  border-radius: 999px;
  color: #0b0918;
  background: var(--aqua);
  font-weight: 800;
  text-decoration: none;
}

footer {
  padding: 1.5rem 0 3rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.82rem;
}

@media (max-width: 720px) {
  header,
  .hero {
    grid-template-columns: 1fr;
  }

  header {
    align-items: flex-start;
    flex-direction: column;
  }

  main {
    padding-top: 2.5rem;
  }

  .prism {
    margin: 2rem 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition: none !important;
  }
}