:root {
  --bg: #ffffff;
  --surface: #f6f6f7;
  --fg: #14161a;
  --muted: #5c626b;
  --line: #e2e4e8;
  --accent: #2f5d50;
  --accent-fg: #ffffff;
  --maxw: 940px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0e1013;
    --surface: #161a1f;
    --fg: #eceef1;
    --muted: #9aa1ab;
    --line: #262b32;
    --accent: #7fb8a4;
    --accent-fg: #0e1013;
  }
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
               Helvetica, Arial, sans-serif;
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.wrap {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- header / nav ---------- */

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

.site-header .wrap {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding-top: 18px;
  padding-bottom: 18px;
}

.brand {
  font-size: 1.35rem;
  font-weight: 650;
  letter-spacing: -0.02em;
  color: var(--fg);
  text-decoration: none;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
}

.nav a {
  color: var(--muted);
  text-decoration: none;
  padding: 7px 12px;
  border-radius: 6px;
  font-size: 0.97rem;
}

.nav a:hover {
  color: var(--fg);
  background: var(--surface);
}

.nav a[aria-current="page"] {
  color: var(--fg);
  font-weight: 600;
  background: var(--surface);
}

/* ---------- main ---------- */

main { flex: 1 0 auto; padding: 56px 0 72px; }

h1 {
  font-size: clamp(1.9rem, 5vw, 2.6rem);
  line-height: 1.18;
  letter-spacing: -0.025em;
  margin: 0 0 18px;
  font-weight: 650;
  max-width: 22ch;
}

h2 {
  font-size: clamp(1.25rem, 3vw, 1.5rem);
  letter-spacing: -0.015em;
  margin: 44px 0 12px;
  font-weight: 640;
}

h3 {
  font-size: 1.05rem;
  margin: 0 0 6px;
  font-weight: 640;
}

p { margin: 0 0 16px; max-width: 68ch; }

.lede {
  font-size: clamp(1.05rem, 2.4vw, 1.2rem);
  color: var(--muted);
  max-width: 60ch;
  margin-bottom: 28px;
}

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

ul { max-width: 68ch; padding-left: 20px; }
li { margin-bottom: 8px; }

/* ---------- cards ---------- */

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
  margin: 24px 0 8px;
}

.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 20px;
}

.card p { margin: 0; color: var(--muted); font-size: 0.96rem; }

.tag {
  display: inline-block;
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 2px 10px;
  margin-bottom: 10px;
}

/* ---------- detail rows ---------- */

.detail {
  border-top: 1px solid var(--line);
  padding: 14px 0;
  display: flex;
  flex-wrap: wrap;
  gap: 4px 24px;
}

.detail dt {
  font-weight: 620;
  min-width: 190px;
  margin: 0;
}

.detail dd { margin: 0; color: var(--muted); }

/* ---------- footer ---------- */

.site-footer {
  flex-shrink: 0;
  border-top: 1px solid var(--line);
  background: var(--surface);
  padding: 32px 0;
  font-size: 0.88rem;
  color: var(--muted);
}

.site-footer p { margin: 0 0 6px; max-width: none; }
.site-footer strong { color: var(--fg); font-weight: 620; }

@media (max-width: 560px) {
  body { font-size: 16px; }
  main { padding: 40px 0 56px; }
  .detail dt { min-width: 100%; }
}