* {
  box-sizing: border-box;
}

:root {
  color-scheme: dark;
  --bg: #050608;
  --panel: rgba(255, 255, 255, 0.055);
  --text: #f4f4f5;
  --muted: #a1a1aa;
  --line: rgba(255, 255, 255, 0.12);
}

html, body {
  min-height: 100%;
  margin: 0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background:
    radial-gradient(circle at 50% 10%, rgba(148, 163, 184, 0.16), transparent 32rem),
    radial-gradient(circle at 80% 80%, rgba(59, 130, 246, 0.12), transparent 28rem),
    var(--bg);
  color: var(--text);
}

a {
  color: inherit;
}

.page {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 2rem;
}

.hero {
  width: min(760px, 100%);
  padding: 4rem 2rem;
  text-align: center;
  border: 1px solid var(--line);
  border-radius: 32px;
  background: var(--panel);
  backdrop-filter: blur(16px);
  box-shadow: 0 30px 100px rgba(0, 0, 0, 0.35);
}

.mark {
  width: 72px;
  height: 72px;
  margin: 0 auto 1.5rem;
  display: grid;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 24px;
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: -0.08em;
  background: rgba(255, 255, 255, 0.06);
}

h1 {
  margin: 0;
  font-size: clamp(3rem, 8vw, 6rem);
  letter-spacing: -0.08em;
  line-height: 0.9;
}

.tagline {
  margin: 1.25rem auto 0;
  max-width: 720px;
  font-size: clamp(1.25rem, 2.2vw, 1.8rem);
  color: var(--text);
}

.subtext {
  max-width: 620px;
  margin: 1rem auto 0;
  color: var(--muted);
  line-height: 1.7;
}

.links {
  margin-top: 2rem;
  display: flex;
  gap: 0.75rem;
  justify-content: center;
  flex-wrap: wrap;
}

.links a, .back {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0.75rem 1rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  text-decoration: none;
  background: rgba(255, 255, 255, 0.05);
}

.content {
  width: min(860px, 100%);
  margin: 0 auto;
  padding: 3rem 1.5rem 5rem;
  line-height: 1.7;
}

.content h1 {
  margin-top: 2rem;
  margin-bottom: 1rem;
  font-size: clamp(2.5rem, 6vw, 4rem);
}

.content h2 {
  margin-top: 2rem;
}

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

@media (max-width: 640px) {
  .hero {
    padding: 3rem 1.25rem;
  }
}