:root {
  --bg: #faf9f7;
  --surface: #ffffff;
  --text: #1c1c1e;
  --text-muted: #5b5b60;
  --border: #e6e3de;
  --accent: #1f6f4a;
  --accent-ink: #0f4a2e;
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #131313;
    --surface: #1b1b1c;
    --text: #f2f1ee;
    --text-muted: #a7a6a2;
    --border: #2c2c2d;
    --accent: #4fbf8b;
    --accent-ink: #8bdcb6;
  }
}

* {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.55;
}

.wrap {
  max-width: 680px;
  margin: 0 auto;
  padding: 0 24px;
}

header.site {
  padding: 28px 0 8px;
}

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

.brand {
  font-weight: 700;
  font-size: 17px;
  text-decoration: none;
  color: var(--text);
  letter-spacing: -0.01em;
}

nav.site a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 15px;
  margin-left: 20px;
}

nav.site a:hover {
  color: var(--text);
}

main {
  padding: 48px 0 96px;
}

.hero {
  padding: 56px 0 40px;
  text-align: center;
}

.hero h1 {
  font-size: clamp(30px, 5vw, 42px);
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin: 0 0 14px;
}

.hero p.lede {
  color: var(--text-muted);
  font-size: 18px;
  max-width: 480px;
  margin: 0 auto;
}

.card-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-top: 40px;
}

@media (max-width: 520px) {
  .card-row {
    grid-template-columns: 1fr;
  }
}

.card {
  display: block;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 22px;
  text-decoration: none;
  color: var(--text);
  transition: border-color 0.15s ease;
}

.card:hover {
  border-color: var(--accent);
}

.card h2 {
  margin: 0 0 6px;
  font-size: 17px;
}

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

h1 {
  font-size: 30px;
  letter-spacing: -0.01em;
}

h2 {
  font-size: 20px;
  margin-top: 36px;
  letter-spacing: -0.01em;
}

h3 {
  font-size: 16px;
  margin-top: 24px;
}

p, li {
  color: var(--text);
}

p.meta {
  color: var(--text-muted);
  font-size: 14px;
}

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

.faq dt {
  font-weight: 600;
  margin-top: 22px;
}

.faq dd {
  margin: 6px 0 0;
  color: var(--text-muted);
}

.callout {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 18px 20px;
  margin: 24px 0;
  font-size: 15px;
}

.button {
  display: inline-block;
  background: var(--accent);
  color: #fff;
  text-decoration: none;
  padding: 11px 20px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 15px;
}

footer.site {
  border-top: 1px solid var(--border);
  padding: 28px 0 40px;
}

footer.site .wrap {
  color: var(--text-muted);
  font-size: 13px;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
}

footer.site a {
  color: var(--text-muted);
}