:root {
  --brand: #5b4cc4;
  --brand-dark: #4a3bb0;
  --text: #1c1b22;
  --muted: #5d5a6b;
  --surface: #ffffff;
  --background: #f6f5fb;
  --border: #e3e0f0;
}

@media (prefers-color-scheme: dark) {
  :root {
    --brand: #a99cff;
    --brand-dark: #c6bdff;
    --text: #ece9f7;
    --muted: #aaa5bf;
    --surface: #1d1b26;
    --background: #13121a;
    --border: #2f2c3d;
  }
}

* { box-sizing: border-box; }

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

main { max-width: 720px; margin: 0 auto; padding: 32px 16px 48px; }

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

.brand { display: flex; align-items: center; gap: 14px; margin: 8px 0 24px; text-decoration: none; color: inherit; }
.brand img { width: 56px; height: 56px; border-radius: 14px; flex: none; }
.brand span { font-size: 28px; font-weight: 700; letter-spacing: -0.01em; }

h1 { font-size: 30px; line-height: 1.2; margin: 0 0 8px; }
h2 { font-size: 21px; margin: 32px 0 8px; }
h3 { font-size: 18px; margin: 24px 0 6px; }
.lead { color: var(--muted); margin: 0 0 24px; }

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

.button {
  display: inline-block;
  background: var(--brand);
  color: #fff;
  font-weight: 600;
  text-decoration: none;
  padding: 14px 22px;
  border-radius: 12px;
  min-height: 48px;
}
.button:hover { background: var(--brand-dark); }
@media (prefers-color-scheme: dark) { .button { color: #13121a; } }

.meta { color: var(--muted); font-size: 15px; margin: 10px 0 0; }

hr { border: 0; border-top: 1px solid var(--border); margin: 40px 0; }

footer { color: var(--muted); font-size: 15px; margin-top: 40px; }
footer a { color: var(--muted); }
footer ul { list-style: none; padding: 0; margin: 8px 0; display: flex; flex-wrap: wrap; gap: 6px 18px; }

.doc li { margin: 4px 0; }
.card > :first-child { margin-top: 0; }
.card > :last-child { margin-bottom: 0; }