/* The published site. One stylesheet, no font to fetch, no script.
 *
 * The colours are the editor's own tokens (netviz/web/assets/app.css), for
 * the same reason and to the same contrast requirement: every one of them
 * clears 4.5:1 against its own background, in both schemes, and nothing is
 * dimmed with opacity. */

:root {
  color-scheme: light dark;
  --bg: #ffffff;
  --raised: #f6f7f9;
  --fg: #1c2024;
  --muted: #5b6167;
  --edge: #cbd1d7;
  --accent: #0b5ed7;
  --focus: #6b21a8;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14171a;
    --raised: #1d2126;
    --fg: #e6e9ec;
    --muted: #a7aeb6;
    --edge: #39414a;
    --accent: #7fb0ff;
    --focus: #c4a1ff;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.65 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

a { color: var(--accent); }
a:focus-visible, button:focus-visible { outline: 2px solid var(--focus); outline-offset: 2px; }

.skip {
  position: absolute;
  left: -9999px;
}
.skip:focus { left: .5rem; top: .5rem; background: var(--bg); padding: .4rem .6rem; z-index: 5; }

.site-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .3rem 1rem;
  padding: .7rem 1.2rem;
  border-bottom: 1px solid var(--edge);
  background: var(--raised);
  position: sticky;
  top: 0;
  z-index: 4;
}

.brand { font: 700 18px/1 var(--mono); color: var(--fg); text-decoration: none; }
.site-head nav { display: flex; flex-wrap: wrap; gap: .9rem; }
.site-head nav a { text-decoration: none; font-size: 14px; }
.site-head nav a:hover { text-decoration: underline; }
.site-head .repo { margin-left: auto; font-size: 14px; }

.prose { max-width: 52rem; margin: 0 auto; padding: 1.5rem 1.2rem 4rem; }
/* A diagram is not prose and is not read at a 52rem measure. */
.prose.wide { max-width: 82rem; }
.prose h1 { font-size: 2rem; line-height: 1.2; margin: 1.2rem 0 .6rem; }
.prose h2 { font-size: 1.45rem; margin: 2rem 0 .5rem; padding-bottom: .2rem;
            border-bottom: 1px solid var(--edge); }
.prose h3 { font-size: 1.15rem; margin: 1.6rem 0 .4rem; }
.prose h4, .prose h5, .prose h6 { font-size: 1rem; margin: 1.2rem 0 .3rem; }
.prose img, .prose svg { max-width: 100%; height: auto; }
.prose blockquote {
  margin: 1rem 0;
  padding: .1rem 1rem;
  border-left: 4px solid var(--edge);
  color: var(--muted);
}

.prose code { font: 13.5px/1.5 var(--mono); background: var(--raised); padding: .1em .3em;
              border-radius: 3px; }
.prose pre { background: var(--raised); border: 1px solid var(--edge); border-radius: 6px;
             padding: .8rem 1rem; overflow-x: auto; }
.prose pre code { background: none; padding: 0; font-size: 13px; }

.prose table { border-collapse: collapse; width: 100%; margin: 1rem 0; display: block;
               overflow-x: auto; }
.prose th, .prose td { border: 1px solid var(--edge); padding: .35rem .6rem; text-align: left;
                       vertical-align: top; font-size: 14px; }
.prose th { background: var(--raised); }

.site-foot {
  border-top: 1px solid var(--edge);
  padding: 1rem 1.2rem 2rem;
  color: var(--muted);
  font-size: 13px;
  text-align: center;
}

/* ------------------------------------------------------------ the demos */

.demo-strip {
  margin: 1.5rem 0;
  padding: 1rem 1.2rem;
  border: 1px solid var(--accent);
  border-left: 4px solid var(--accent);
  border-radius: 8px;
  background: var(--raised);
}
.demo-strip h2 { margin: 0 0 .3rem; border: 0; font-size: 1.2rem; }
.demo-strip p { margin: 0 0 .6rem; }
.demo-strip ul { display: flex; flex-wrap: wrap; gap: .5rem; margin: 0; padding: 0;
                 list-style: none; }
.demo-strip a {
  display: inline-block;
  padding: .3rem .7rem;
  border: 1px solid var(--edge);
  border-radius: 999px;
  background: var(--bg);
  text-decoration: none;
  font: 13px/1.6 var(--mono);
}

.cards { display: grid; gap: 1rem; grid-template-columns: repeat(auto-fit, minmax(17rem, 1fr));
         padding: 0; margin: 1.5rem 0; list-style: none; }
.card { border: 1px solid var(--edge); border-radius: 8px; padding: 1rem; background: var(--raised); }
.card h3 { margin: 0 0 .3rem; font: 600 1.05rem/1.3 var(--mono); }
.card p { margin: 0 0 .7rem; font-size: 14px; color: var(--muted); }
.card .layers { font: 12px/1.6 var(--mono); color: var(--muted); }

/* The render, embedded. Tall enough to be a diagram rather than a peephole,
 * and capped against the viewport so the page around it stays reachable. */
.demo-frame {
  width: 100%;
  height: min(75vh, 44rem);
  border: 1px solid var(--edge);
  border-radius: 8px;
  background: var(--bg);
}
.demo-meta { font-size: 14px; color: var(--muted); }

@media (forced-colors: active) {
  .demo-strip, .card { border-color: CanvasText; }
}