:root {
  --bg: #ffffff;
  --text: #16161d;
  --muted: #5c5c6b;
  --line: #e6e6ee;
  --accent: #2a2ea8;
  --card: #f6f6fa;
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0e0e13;
    --text: #ececf2;
    --muted: #a0a0b0;
    --line: #26262f;
    --accent: #8a8ef0;
    --card: #17171f;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.6 -apple-system, BlinkMacSystemFont, "SF Pro Text", "Helvetica Neue", Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}

main {
  max-width: 680px;
  margin: 0 auto;
  padding: 48px 16px 64px;
}

header {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 40px;
}

header a {
  display: flex;
  align-items: center;
  gap: 14px;
  color: inherit;
  text-decoration: none;
  font-weight: 600;
  font-size: 20px;
}

header img {
  width: 44px;
  height: 44px;
  border-radius: 10px;
}

h1 {
  font-size: 34px;
  line-height: 1.2;
  margin: 0 0 12px;
  letter-spacing: -0.02em;
}

h2 {
  font-size: 21px;
  margin: 40px 0 8px;
}

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

.lead {
  font-size: 20px;
  color: var(--muted);
  margin: 0 0 32px;
}

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

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

ul { padding-left: 20px; }

li { margin: 6px 0; }

.cards {
  display: grid;
  gap: 12px;
  margin: 32px 0;
}

.card {
  display: block;
  padding: 18px 20px;
  background: var(--card);
  border-radius: 14px;
  color: inherit;
  text-decoration: none;
}

.card strong { display: block; margin-bottom: 2px; }

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

footer {
  margin-top: 56px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
  font-size: 14px;
  color: var(--muted);
}

footer a { color: var(--muted); }