:root {
  --bg: #fbfaf7;
  --surface: #ffffff;
  --text: #1d1f23;
  --muted: #5b616b;
  --line: #e4e1da;
  --accent: #1f5f8b;
  --accent-soft: #e8f1f7;
  --todo-bg: #fff4d6;
  --todo-line: #e0b84a;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #15171a;
    --surface: #1c1f23;
    --text: #e8e6e1;
    --muted: #a0a6ae;
    --line: #2e3238;
    --accent: #7db8e0;
    --accent-soft: #1e2e3a;
    --todo-bg: #3a3014;
    --todo-line: #8a6f22;
  }
}

* { 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 Neue", Arial, sans-serif;
  font-size: 17px;
  line-height: 1.65;
}

.wrap {
  max-width: 44rem;
  margin: 0 auto;
  padding: 0 16px;
}

header.site {
  border-bottom: 1px solid var(--line);
  padding: 18px 0;
}

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

.brand {
  font-weight: 650;
  letter-spacing: -0.01em;
  color: var(--text);
  text-decoration: none;
}

nav a {
  color: var(--muted);
  text-decoration: none;
  margin-left: 18px;
  font-size: 15px;
}
nav a:first-child { margin-left: 0; }
nav a:hover, nav a[aria-current="page"] { color: var(--accent); }

main { padding: 40px 0 56px; }

h1 {
  font-size: 2rem;
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin: 0 0 12px;
}

h2 {
  font-size: 1.2rem;
  margin: 36px 0 8px;
  letter-spacing: -0.01em;
}

p, ul { margin: 0 0 14px; }
ul { padding-left: 1.25rem; }
li { margin-bottom: 6px; }

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

.lede { font-size: 1.1rem; color: var(--text); }
.meta { color: var(--muted); font-size: 15px; }

.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 18px 20px;
  margin: 24px 0;
}

.facts { list-style: none; padding: 0; margin: 0; }
.facts li { padding: 8px 0; border-bottom: 1px solid var(--line); margin: 0; }
.facts li:last-child { border-bottom: 0; }
.facts strong { display: inline-block; min-width: 8.5rem; }

.button {
  display: inline-block;
  background: var(--accent);
  color: var(--bg);
  text-decoration: none;
  font-weight: 600;
  padding: 10px 18px;
  border-radius: 8px;
}

blockquote {
  margin: 14px 0;
  padding: 10px 16px;
  border-left: 3px solid var(--accent);
  background: var(--accent-soft);
}

/* Draft markers — remove every .todo before publishing (npm run check enforces this). */
.todo {
  background: var(--todo-bg);
  border: 1px dashed var(--todo-line);
  border-radius: 4px;
  padding: 0 4px;
  font-size: 0.95em;
}

footer.site {
  border-top: 1px solid var(--line);
  padding: 20px 0 32px;
  color: var(--muted);
  font-size: 14px;
}
footer.site a { color: var(--muted); }