:root {
  --bg: #0e1116;
  --fg: #e6edf3;
  --muted: #9aa7b2;
  --accent: #22d3ee;
  --rule: #232a33;
  --maxw: 900px;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
main { max-width: var(--maxw); margin: 0 auto; padding: 2rem 1rem 4rem; }
a { color: var(--accent); }
h1 { margin: 0 0 .5rem; font-size: 1.9rem; }
h2 {
  margin: 2.5rem 0 .75rem; font-size: 1.4rem;
  border-bottom: 1px solid var(--rule); padding-bottom: .3rem;
  display: flex; justify-content: space-between; align-items: baseline;
  flex-wrap: wrap; gap: .5rem;
}
.top-link { font-size: .6em; font-weight: 400; text-decoration: none; white-space: nowrap; }
.gh-link { color: var(--fg); display: inline-block; line-height: 0; vertical-align: middle; }
.gh-link:hover { color: var(--accent); }
p { max-width: 68ch; }
.tagline { color: var(--muted); }
.caption { color: var(--muted); font-size: .9rem; }
img, video { max-width: 100%; height: auto; display: block; border-radius: 6px; }
video { width: 100%; background: #000; }
section > video, section > img { margin: .5rem 0; }
/* A/B and before/after pairs: side by side on wide screens, stack when narrow */
.ab { display: flex; flex-wrap: wrap; gap: 1rem; }
.ab figure { flex: 1 1 340px; margin: 0; }
.ab figcaption { color: var(--muted); font-size: .9rem; margin-bottom: .3rem; }
ul { padding-left: 1.2rem; max-width: 68ch; }
li { margin: .3rem 0; }
code { background: #1b222b; padding: .1em .35em; border-radius: 4px; font-size: .9em; }
.site-header { margin-bottom: 1rem; }
.site-footer { margin-top: 3rem; border-top: 1px solid var(--rule); padding-top: 1rem; color: var(--muted); }