:root {
  --bg: #f4f6fb;
  --card: #ffffff;
  --text: #131a33;
  --muted: #636b84;
  --border: #e0e5ef;
  --tint: #2347c5;
  --tint-soft: #e3e9fb;
  --coral: #e5322d;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0a0e1a;
    --card: #151b2b;
    --text: #f1f4ff;
    --muted: #9ea6c2;
    --border: #283047;
    --tint: #7d9bff;
    --tint-soft: #1b2552;
    --coral: #ff6259;
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.6 -apple-system, BlinkMacSystemFont, 'SF Pro Text', 'Segoe UI', Roboto, sans-serif;
}

main {
  max-width: 720px;
  margin: 0 auto;
  padding: 32px 16px 64px;
}

header {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 24px;
}

header img {
  width: 64px;
  height: 64px;
  border-radius: 16px;
}

header a {
  color: inherit;
  text-decoration: none;
}

h1 {
  font-family: ui-rounded, -apple-system, 'Segoe UI', sans-serif;
  font-size: 32px;
  line-height: 1.2;
  margin: 0;
}

h2 {
  font-family: ui-rounded, -apple-system, 'Segoe UI', sans-serif;
  font-size: 21px;
  margin: 32px 0 8px;
}

p,
li {
  color: var(--text);
}

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

.card {
  background: var(--card);
  border-radius: 24px;
  padding: 20px 24px;
  margin: 16px 0;
}

.highlight {
  background: var(--tint-soft);
  border-radius: 16px;
  padding: 16px 20px;
  font-weight: 600;
}

a {
  color: var(--tint);
  font-weight: 600;
}

.links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.button {
  display: inline-block;
  background: var(--tint);
  color: #ffffff;
  border-radius: 16px;
  padding: 12px 20px;
  text-decoration: none;
}

.button.secondary {
  background: var(--card);
  color: var(--text);
  border: 1px solid var(--border);
}

footer {
  margin-top: 48px;
  font-size: 14px;
  color: var(--muted);
}