:root {
  --bg: #ffffff;
  --text: #1d1d1f;
  --muted: #6e6e73;
  --line: #e5e5ea;
  --accent: #7d4cdb;
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b0a14;
    --text: #f5f5f7;
    --muted: #a1a1a6;
    --line: #2c2a3a;
    --accent: #b99cff;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.55 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

main {
  max-width: 720px;
  margin: 0 auto;
  padding: 48px 16px 64px;
}

header.brand {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 32px;
}

header.brand img {
  width: 56px;
  height: 56px;
  border-radius: 13px;
}

header.brand a {
  color: inherit;
  text-decoration: none;
  font-size: 24px;
  font-weight: 700;
}

h1 { font-size: 34px; line-height: 1.2; margin: 0 0 8px; }
h2 { font-size: 22px; margin: 36px 0 8px; }
h3 { font-size: 18px; margin: 24px 0 4px; }

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

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

ul { padding-left: 22px; }

.card {
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 16px 20px;
  margin: 24px 0;
}

footer {
  margin-top: 56px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 15px;
}

footer a { color: var(--muted); margin-right: 16px; }