:root {
  --bg: #fbfaf7;
  --fg: #1c2230;
  --muted: #4a5568;
  --accent: #8a3d00;
  --accent-bg: #fff1e0;
  --line: #d9d4c8;
  --code-bg: #f1eee6;
  --focus: #0050c8;
  --header-bg: #1b2a41;
  --header-fg: #ffffff;
  --header-link: #ffd89a;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #12161d;
    --fg: #e8e6e0;
    --muted: #b5b9c2;
    --accent: #ffb862;
    --accent-bg: #2b2114;
    --line: #333a47;
    --code-bg: #1c222c;
    --focus: #8ab8ff;
    --header-bg: #0b0f15;
  }
}
* { box-sizing: border-box; }
html { font-size: 100%; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  line-height: 1.65;
}
.wrap { max-width: 46rem; margin: 0 auto; padding: 0 1rem; }
a { color: var(--accent); text-underline-offset: 0.15em; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 3px solid var(--focus); outline-offset: 2px; }
.skip { position: absolute; left: -999px; top: 0; background: var(--bg); color: var(--fg); padding: 0.5rem 1rem; z-index: 10; }
.skip:focus { left: 0; }
.site-header { background: var(--header-bg); color: var(--header-fg); }
.site-header .bar { display: flex; flex-wrap: wrap; align-items: center; gap: 0.5rem 1.25rem; padding-top: 0.75rem; padding-bottom: 0.75rem; }
.site-header a { color: var(--header-link); }
.site-header :focus-visible { outline-color: #ffffff; }
.brand { font-weight: 700; font-size: 1.2rem; text-decoration: none; letter-spacing: 0.02em; }
.site-header ul { list-style: none; display: flex; flex-wrap: wrap; gap: 0.25rem 1rem; margin: 0; padding: 0; }
.site-header nav:last-child { margin-left: auto; }
.site-header [aria-current] { font-weight: 700; color: var(--header-fg); text-decoration: none; }
main { padding-top: 1.5rem; padding-bottom: 3rem; }
h1, h2, h3, h4 { line-height: 1.25; }
h1 { font-size: 2rem; margin: 1rem 0 0.5rem; }
h2 { font-size: 1.5rem; margin-top: 2rem; }
h3 { font-size: 1.2rem; }
.meta { color: var(--muted); margin: 0 0 1rem; }
.banner { background: var(--accent-bg); border: 1px solid var(--accent); padding: 0.6rem 1rem; border-radius: 6px; }
.badge { font-size: 0.75rem; border: 1px solid var(--accent); color: var(--accent); border-radius: 4px; padding: 0 0.4rem; vertical-align: middle; }
.tags { list-style: none; display: flex; gap: 0.5rem; padding: 0; margin: 0 0 1rem; flex-wrap: wrap; }
.tags li { background: var(--code-bg); border-radius: 4px; padding: 0 0.5rem; font-size: 0.85rem; }
.card { border-top: 1px solid var(--line); padding: 0.5rem 0 0.25rem; }
.card h3 { margin: 0.25rem 0; }
.card p { margin: 0.25rem 0; }
.prose img, .prose video, .prose iframe { max-width: 100%; height: auto; }
code { background: var(--code-bg); padding: 0.1em 0.3em; border-radius: 4px; font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: 0.92em; }
pre { background: var(--code-bg); padding: 0.75rem 1rem; border-radius: 6px; overflow-x: auto; }
pre code { background: none; padding: 0; }
blockquote { margin: 1rem 0; padding: 0.1rem 1rem; border-left: 4px solid var(--accent); color: var(--muted); }
hr { border: 0; border-top: 1px solid var(--line); margin: 2rem 0; }
.table-wrap { overflow-x: auto; }
table { border-collapse: collapse; width: 100%; }
th, td { border: 1px solid var(--line); padding: 0.35rem 0.6rem; text-align: left; }
th { background: var(--code-bg); }
.align-right { text-align: right; }
.align-center { text-align: center; }
figure.media { margin: 1.5rem 0; }
figure.media video { width: 100%; background: #000; border-radius: 6px; }
figure.media audio { width: 100%; }
figcaption { color: var(--muted); font-size: 0.9rem; margin-top: 0.4rem; }
.media-youtube { margin: 1.5rem 0; }
.yt-load { display: flex; align-items: center; gap: 0.75rem; width: 100%; aspect-ratio: 16 / 9; justify-content: center; background: #1b2a41; color: #ffffff; text-decoration: none; border-radius: 6px; font-weight: 600; padding: 1rem; text-align: center; }
.yt-load:hover { background: #26395a; }
.yt-play { font-size: 1.6rem; color: #ffd89a; }
.yt-note { color: var(--muted); font-size: 0.85rem; margin: 0.4rem 0 0; }
.yt-frame { width: 100%; aspect-ratio: 16 / 9; border: 0; border-radius: 6px; }
.site-footer { border-top: 1px solid var(--line); color: var(--muted); font-size: 0.9rem; padding: 1rem 0 2rem; }
.chooser { text-align: center; padding-top: 4rem; }
.chooser ul { list-style: none; padding: 0; font-size: 1.4rem; }
@media (max-width: 30rem) {
  h1 { font-size: 1.6rem; }
  .site-header nav:last-child { margin-left: 0; }
}
@media (prefers-reduced-motion: reduce) { * { scroll-behavior: auto !important; } }
.doc-links a.button { display: inline-block; padding: 0.4rem 0.9rem; border: 1px solid var(--accent); border-radius: 6px; font-weight: 600; }
.reader { margin: 1rem 0; }
.reader iframe { width: 100%; height: 80vh; min-height: 24rem; border: 1px solid var(--line); border-radius: 6px; background: var(--code-bg); }