:root {
  --bg: #fafaf8;
  --ink: #16161a;
  --muted: #6b6b70;
  --line: #e6e6e2;
  --accent: #2b2b31;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
}

body {
  background: var(--bg);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

.wrap {
  max-width: 780px;
  margin: 0 auto;
  padding: 0 24px;
}

header.site {
  border-bottom: 1px solid var(--line);
}

header.site .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.logo {
  font-weight: 600;
  letter-spacing: -0.01em;
  text-decoration: none;
  color: var(--ink);
  font-size: 15px;
}

nav.main a {
  color: var(--muted);
  text-decoration: none;
  font-size: 14px;
  margin-left: 24px;
}

nav.main a:hover,
nav.main a[aria-current="page"] {
  color: var(--ink);
}

main {
  padding: 64px 0 96px;
}

.hero h1 {
  font-size: 32px;
  line-height: 1.25;
  margin: 0 0 12px;
  letter-spacing: -0.01em;
}

.hero p.lede {
  color: var(--muted);
  font-size: 17px;
  max-width: 46ch;
  margin: 0 0 32px;
}

.cta {
  display: inline-flex;
  gap: 12px;
}

.btn {
  display: inline-block;
  padding: 10px 18px;
  border-radius: 6px;
  text-decoration: none;
  font-size: 14px;
  border: 1px solid var(--line);
}

.btn.primary {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

.btn.ghost {
  color: var(--ink);
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 20px;
  margin-top: 56px;
}

.card {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 18px;
}

.card .tag {
  color: var(--muted);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.card h3 {
  margin: 8px 0 6px;
  font-size: 16px;
}

.card p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

.page-title {
  font-size: 26px;
  margin: 0 0 8px;
}

.page-sub {
  color: var(--muted);
  margin: 0 0 40px;
}

article.prose p {
  max-width: 62ch;
  color: #34343a;
}

footer.site {
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 13px;
}

footer.site .wrap {
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.error-page main {
  min-height: 60vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 0;
}

.error-page h1 {
  font-size: 72px;
  margin: 0;
  color: var(--line);
}

.error-page p {
  color: var(--muted);
  margin: 8px 0 24px;
}