:root {
  color-scheme: dark;
  --bg: #11131a;
  --panel-border: rgba(255, 255, 255, 0.08);
  --text: #f5f7fb;
  --muted: #b5becf;
  --accent-strong: #4b8df8;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 32px;
  font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background:
    radial-gradient(circle at top, rgba(110, 168, 255, 0.18), transparent 35%),
    linear-gradient(180deg, #0d1016, var(--bg));
  color: var(--text);
}

main {
  width: min(100%, 760px);
  padding: 40px;
  border: 1px solid var(--panel-border);
  border-radius: 28px;
  background: rgba(27, 31, 42, 0.92);
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.35);
}

h1 {
  margin: 0 0 8px;
  font-size: clamp(2.25rem, 4vw, 3.5rem);
  line-height: 1;
}

.lead {
  margin: 0;
  color: var(--muted);
  font-size: 1.05rem;
  line-height: 1.6;
}

.links {
  margin-top: 28px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 18px;
  border-radius: 999px;
  text-decoration: none;
  font-weight: 600;
  transition: background-color 160ms ease, transform 160ms ease;
}

a.primary {
  background: var(--accent-strong);
  color: white;
}

a.secondary {
  background: rgba(255, 255, 255, 0.06);
  color: var(--text);
  border: 1px solid var(--panel-border);
}

a:hover {
  transform: translateY(-1px);
}

a:focus-visible {
  outline: 3px solid rgba(245, 247, 251, 0.85);
  outline-offset: 3px;
}