:root {
  --ink: #1b1f24;
  --muted: #5b6570;
  --line: #e3e7eb;
  --bg: #ffffff;
  --soft: #f6f8fa;
  --accent: #1f5fd6;
}

* { box-sizing: border-box; }

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

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

.wrap { max-width: 44rem; margin: 0 auto; padding: 0 1.25rem; }

header.site { border-bottom: 1px solid var(--line); }
header.site .wrap { display: flex; align-items: center; justify-content: space-between; padding-top: 1rem; padding-bottom: 1rem; }
header.site .brand { font-weight: 700; color: var(--ink); text-decoration: none; letter-spacing: -0.01em; }
header.site nav a { margin-left: 1.25rem; color: var(--muted); text-decoration: none; font-size: 0.95rem; }
header.site nav a:hover { color: var(--ink); }

.badge {
  display: inline-block;
  padding: 0.15rem 0.6rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--soft);
  color: var(--muted);
  font-size: 0.8rem;
  font-weight: 600;
}

h1 { font-size: 2.1rem; line-height: 1.2; letter-spacing: -0.02em; margin: 1rem 0 0.75rem; }
h2 { font-size: 1.3rem; margin: 2.5rem 0 0.5rem; letter-spacing: -0.01em; }
h3 { font-size: 1.05rem; margin: 1.5rem 0 0.25rem; }
.lede { font-size: 1.15rem; color: var(--muted); }
main { padding: 2.5rem 0 3rem; }

ol.steps { padding-left: 1.25rem; }
ol.steps li { margin: 0.6rem 0; }

.card {
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--soft);
  padding: 1rem 1.25rem;
  margin: 1.25rem 0;
}

.mock {
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #fff;
  margin: 1rem 0 2rem;
  overflow: hidden;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
}
.mock .bar { background: var(--soft); border-bottom: 1px solid var(--line); padding: 0.6rem 1rem; font-size: 0.85rem; color: var(--muted); }
.mock .bar b { color: var(--ink); }
.mock .body { padding: 1rem 1.25rem; }
.mock .body pre { white-space: pre-wrap; font: inherit; margin: 0.5rem 0; }
.mock .quote { border-left: 3px solid var(--line); padding-left: 0.9rem; color: var(--muted); }

.button {
  display: inline-block;
  padding: 0.55rem 1.1rem;
  border: 0;
  border-radius: 6px;
  background: var(--accent);
  color: #fff;
  font: inherit;
  font-weight: 600;
  cursor: default;
}
.button.secondary { background: #fff; color: var(--ink); border: 1px solid var(--line); margin-left: 0.5rem; }

footer.site { border-top: 1px solid var(--line); color: var(--muted); font-size: 0.9rem; }
footer.site .wrap { padding-top: 1.5rem; padding-bottom: 2rem; }
footer.site a { color: var(--muted); }

@media (max-width: 480px) {
  h1 { font-size: 1.7rem; }
  header.site .wrap { flex-direction: column; align-items: flex-start; gap: 0.5rem; }
  header.site nav a { margin: 0 1rem 0 0; }
}