/* usdspec-conformance pages — single minimal stylesheet, no frameworks, no JS. */

:root {
  color-scheme: light dark;
  --fg: #1c1c1c;
  --bg: #fdfdfc;
  --muted: #666;
  --accent: #0a66c2;
  --border: #ddd;
  --code-bg: #f3f3f1;
}

@media (prefers-color-scheme: dark) {
  :root {
    --fg: #e8e6e3;
    --bg: #17191b;
    --muted: #9a9a9a;
    --accent: #6cb2ff;
    --border: #35383b;
    --code-bg: #232628;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Noto Sans", sans-serif;
  line-height: 1.6;
  color: var(--fg);
  background: var(--bg);
}

.wrap {
  max-width: 56rem;
  margin: 0 auto;
  padding: 0 1rem;
}

/* Header / nav */

.site-header {
  border-bottom: 1px solid var(--border);
}
.site-header .wrap {
  padding-top: 0.75rem;
  padding-bottom: 0.75rem;
}
.site-header .home {
  font-weight: 700;
  color: var(--fg);
  text-decoration: none;
  margin-right: 1rem;
}
.site-header nav {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 0.25rem 0.9rem;
  font-size: 0.95rem;
}
.site-header nav a {
  color: var(--accent);
  text-decoration: none;
  white-space: nowrap;
}
.site-header nav a:hover,
.site-header .home:hover { text-decoration: underline; }
.site-header nav a[aria-current="page"] { font-weight: 600; }

/* Content */

main {
  max-width: 56rem;
  margin: 0 auto;
  padding: 1.25rem 1rem 2rem;
}

h1, h2, h3, h4 {
  line-height: 1.25;
  overflow-wrap: break-word;
}
h1 { font-size: 1.65rem; }
h2 { font-size: 1.3rem; margin-top: 2rem; }
h3 { font-size: 1.1rem; }
h2, h3 { scroll-margin-top: 1rem; }

a { color: var(--accent); }
a:hover { text-decoration: underline; }

code, kbd, samp {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
  font-size: 0.92em;
  background: var(--code-bg);
  padding: 0.1em 0.3em;
  border-radius: 3px;
  overflow-wrap: break-word;
}

pre {
  background: var(--code-bg);
  padding: 0.75rem 1rem;
  border-radius: 6px;
  overflow-x: auto;
  line-height: 1.45;
}
pre code {
  background: none;
  padding: 0;
  font-size: 0.88em;
}

/* Wide registry tables scroll horizontally instead of blowing up the page. */
table {
  border-collapse: collapse;
  display: block;
  overflow-x: auto;
  font-size: 0.92rem;
  margin: 1rem 0;
}
th, td {
  border: 1px solid var(--border);
  padding: 0.45rem 0.65rem;
  text-align: left;
  vertical-align: top;
}
th { background: rgba(127, 127, 127, 0.1); }

blockquote {
  margin: 1rem 0;
  padding: 0.25rem 1rem;
  border-left: 4px solid var(--border);
  color: var(--muted);
}

hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 2rem 0;
}

/* Footer */

.site-footer {
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.9rem;
}
.site-footer .wrap {
  padding-top: 1rem;
  padding-bottom: 1rem;
}