*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg: #0a0a0a;
  --bg-code: #141414;
  --border: #222;
  --text: #e5e5e5;
  --text-dim: #888;
  --text-heading: #fff;
  --accent: #a5b4fc;
  --font: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --mono: 'JetBrains Mono', ui-monospace, 'Cascadia Code', monospace;
}

html { font-size: 16px; scroll-behavior: smooth; }

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: 720px;
  margin: 0 auto;
  padding: 4rem 1.5rem 6rem;
}

h1 {
  font-size: 2rem;
  font-weight: 600;
  color: var(--text-heading);
  letter-spacing: -0.03em;
  margin-bottom: 0.75rem;
}

h2 {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--text-heading);
  margin-top: 3rem;
  margin-bottom: 1rem;
  letter-spacing: -0.01em;
}

h3 {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-top: 2rem;
  margin-bottom: 0.75rem;
}

p {
  margin-bottom: 1rem;
}

/* First paragraph after h1 — acts as tagline */
h1 + p {
  color: var(--text-dim);
  font-size: 1.1rem;
  line-height: 1.5;
  margin-bottom: 2.5rem;
}

a {
  color: var(--accent);
  text-decoration: none;
}
a:hover { text-decoration: underline; }

ul, ol {
  margin-bottom: 1rem;
  padding-left: 0;
  list-style: none;
}

li {
  position: relative;
  padding-left: 1.25rem;
  margin-bottom: 0.4rem;
}

li::before {
  content: '—';
  position: absolute;
  left: 0;
  color: var(--text-dim);
}

ol { counter-reset: ol-counter; }
ol li { counter-increment: ol-counter; }
ol li::before {
  content: counter(ol-counter) '.';
  font-weight: 500;
  color: var(--text-dim);
}

li strong {
  color: var(--text-heading);
}

code {
  font-family: var(--mono);
  font-size: 0.875rem;
}

p code, li code {
  background: var(--bg-code);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 0.15em 0.4em;
}

pre {
  background: var(--bg-code);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1.25rem 1.5rem;
  overflow-x: auto;
  margin-bottom: 1.5rem;
}

pre code {
  color: var(--text);
  line-height: 1.6;
  background: none;
  border: none;
  padding: 0;
}

/* Syntax highlight classes applied by JS */
.hl-comment { color: #555; }
.hl-command { color: var(--text); }
.hl-flag { color: #7dd3fc; }
.hl-string { color: #86efac; }

/* Horizontal rules — used as section dividers */
hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 3rem 0;
}

footer {
  margin-top: 4rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
  color: var(--text-dim);
  font-size: 0.85rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

@media (max-width: 640px) {
  .container { padding: 2rem 1rem 4rem; }
  h1 { font-size: 1.5rem; }
  pre { padding: 1rem; font-size: 0.8rem; }
  footer { flex-direction: column; gap: 0.5rem; }
}