:root {
  --ink: #16161d;
  --muted: #5f5f6b;
  --line: #e4e4e9;
  --paper: #ffffff;
  --accent: #c90f3f;
}

@media (prefers-color-scheme: dark) {
  :root {
    --ink: #f2f2f5;
    --muted: #a3a3ae;
    --line: #2c2c35;
    --paper: #111116;
    --accent: #ff6b8e;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 17px/1.55 -apple-system, BlinkMacSystemFont, "SF Pro Text", system-ui, sans-serif;
  -webkit-text-size-adjust: 100%;
}

main, footer {
  max-width: 640px;
  margin: 0 auto;
  padding: 0 24px;
}

main { padding-top: 56px; padding-bottom: 32px; }

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 40px;
  color: var(--ink);
  font-weight: 600;
  text-decoration: none;
}

.brand img { width: 32px; height: 32px; border-radius: 7px; }

h1 { margin: 0 0 12px; font-size: 34px; font-weight: 600; line-height: 1.15; letter-spacing: -0.02em; }
h2 { margin: 40px 0 8px; font-size: 21px; font-weight: 600; line-height: 1.3; }
h3 { margin: 24px 0 4px; font-size: 17px; font-weight: 600; }
p, ul, ol { margin: 0 0 16px; }
ul, ol { padding-left: 24px; }
li { margin-bottom: 8px; }
a { color: var(--accent); }

.lead { color: var(--muted); font-size: 19px; }
.note { color: var(--muted); font-size: 15px; }

footer {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  padding-top: 20px;
  padding-bottom: 40px;
  color: var(--muted);
  font-size: 15px;
}

footer::before {
  content: "";
  flex-basis: 100%;
  border-top: 1px solid var(--line);
  margin-bottom: 12px;
}