* {
  box-sizing: border-box;
}

:root {
  color-scheme: dark;
  --bg-top: #08111e;
  --bg-bottom: #04070d;
  --panel: rgba(10, 18, 36, 0.82);
  --border: rgba(122, 171, 255, 0.24);
  --text: #dbe7ff;
  --muted: #9eb3d8;
  --accent: #8fd0ff;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Segoe UI", system-ui, sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(66, 135, 245, 0.22), transparent 28%),
    radial-gradient(circle at bottom right, rgba(77, 208, 225, 0.18), transparent 24%),
    linear-gradient(180deg, var(--bg-top), var(--bg-bottom));
}

main {
  width: min(860px, calc(100vw - 32px));
  margin: 40px auto;
  padding: 28px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 20px;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.35);
}

h1,
h2 {
  margin: 0 0 12px;
}

h1 {
  color: var(--accent);
  font-size: clamp(2rem, 3vw, 2.7rem);
}

h2 {
  margin-top: 28px;
  color: #b9d8ff;
  font-size: 1.1rem;
}

p,
li {
  color: var(--muted);
  line-height: 1.6;
}

ul {
  padding-left: 20px;
}

a {
  color: var(--accent);
}

.eyebrow {
  margin-bottom: 10px;
  color: #8ca2c7;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  font-size: 0.78rem;
}

.callout {
  margin: 22px 0;
  padding: 16px 18px;
  border-left: 3px solid rgba(143, 208, 255, 0.6);
  background: rgba(143, 208, 255, 0.08);
  border-radius: 10px;
}

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

.nav-row a {
  text-decoration: none;
  padding: 10px 14px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: rgba(15, 24, 44, 0.75);
}

.nav-row a:hover,
.nav-row a:focus-visible {
  background: rgba(38, 64, 111, 0.75);
}

@media (max-width: 640px) {
  main {
    width: min(100vw - 20px, 860px);
    margin: 16px auto;
    padding: 20px;
    border-radius: 16px;
  }
}