:root {
  --bg: #f7f8fa;
  --surface: #ffffff;
  --text: #1b1f24;
  --muted: #5b6470;
  --accent: #1f6f5c;
  --accent-soft: #e3f1ec;
  --border: #e2e5ea;
  --danger: #b3261e;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #111417;
    --surface: #1a1e22;
    --text: #e7eaee;
    --muted: #a0a8b2;
    --accent: #6fcfb2;
    --accent-soft: #1d3330;
    --border: #2b3137;
    --danger: #f2b8b5;
  }
}

* { box-sizing: border-box; }

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

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

header.site {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 40px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 20px;
  color: var(--text);
  text-decoration: none;
}

.brand img { width: 32px; height: 32px; }

nav a {
  color: var(--muted);
  text-decoration: none;
  margin-left: 16px;
  font-size: 15px;
}

nav a:first-child { margin-left: 0; }
nav a:hover, nav a[aria-current="page"] { color: var(--accent); }

h1 { font-size: 34px; line-height: 1.2; margin: 0 0 12px; }
h2 { font-size: 22px; margin: 40px 0 8px; }
h3 { font-size: 18px; margin: 24px 0 4px; }

p.lede { font-size: 19px; color: var(--muted); margin-top: 0; }
.muted { color: var(--muted); }

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

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 20px 22px;
  margin: 16px 0;
}

.steps {
  display: grid;
  gap: 12px;
  grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
  margin: 24px 0;
}

.steps .card { margin: 0; }
.steps .num {
  display: inline-grid;
  place-items: center;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--accent-soft);
  color: var(--accent);
  font-weight: 700;
  font-size: 14px;
  margin-bottom: 8px;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 15px;
}

th, td {
  text-align: left;
  vertical-align: top;
  padding: 10px 8px;
  border-bottom: 1px solid var(--border);
}

th { color: var(--muted); font-weight: 600; }

.table-wrap { overflow-x: auto; }

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

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