/* Netlaces legal site (spec §3.5). One file; no web fonts, no images.
   Contrast, measured (WCAG 2): text >= 15:1, muted text >= 8:1, links
   >= 6.7:1, the banner >= 10.9:1, borders and the focus ring >= 4:1, in
   both schemes. */

:root {
  color-scheme: light dark;
  --bg: #ffffff;
  --fg: #1b1b1b;
  --muted: #4f4f4f;
  --link: #0b4fb3;
  --link-visited: #6b2fa0;
  --border: #767676;
  --focus: #0b4fb3;
  --subtle-bg: #f2f2f2;
  --banner-bg: #fff1c2;
  --banner-fg: #3a2d00;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #151515;
    --fg: #ececec;
    --muted: #b5b5b5;
    --link: #8db6ff;
    --link-visited: #cfa8ff;
    --border: #8c8c8c;
    --focus: #8db6ff;
    --subtle-bg: #242424;
    --banner-bg: #3a2f00;
    --banner-fg: #ffe9a3;
  }
}

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

html {
  -webkit-text-size-adjust: 100%;
  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,
    "Noto Sans",
    sans-serif;
  font-size: 1.0625rem;
  line-height: 1.6;
  overflow-wrap: break-word;
}

/* Content column: ~70ch measure, 16px side gutter. */
.wrap {
  max-width: calc(70ch + 32px);
  margin-inline: auto;
  padding-inline: 16px;
}

/* Links are always underlined: color never carries meaning alone. */
a {
  color: var(--link);
  text-decoration: underline;
  text-underline-offset: 0.15em;
}

a:visited {
  color: var(--link-visited);
}

:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 2px;
}

.skip-link {
  position: absolute;
  left: 16px;
  top: 0;
  z-index: 1;
  padding: 0.5rem 0.75rem;
  background: var(--bg);
  color: var(--link);
  transform: translateY(-120%);
}

.skip-link:focus,
.skip-link:focus-visible {
  transform: translateY(0.5rem);
}

/* Chrome */

.site-header {
  border-bottom: 1px solid var(--border);
}

.preview-banner {
  margin: 0;
  padding: 0.6rem 16px;
  background: var(--banner-bg);
  color: var(--banner-fg);
  text-align: center;
}

.preview-banner a,
.preview-banner a:visited {
  color: inherit;
}

.bar {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.25rem 0.75rem;
  padding-block: 0.9rem;
}

.wordmark {
  font-weight: 700;
  font-size: 1.15rem;
}

.wordmark,
.wordmark:visited {
  color: var(--fg);
}

.site-section {
  color: var(--muted);
}

.site-footer {
  margin-top: 3rem;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.95rem;
}

.site-footer p {
  margin-block: 1.25rem;
}

main {
  display: block;
  padding-block: 1.5rem;
}

/* Document */

h1,
h2,
h3,
h4 {
  line-height: 1.3;
}

h1 {
  margin: 0.5rem 0 1rem;
  font-size: 1.9rem;
}

h2 {
  font-size: 1.4rem;
}

h3 {
  font-size: 1.15rem;
}

/* A heading with its self-link. */
.heading {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
  margin: 2rem 0 0.75rem;
}

.heading > h2,
.heading > h3 {
  margin: 0;
}

.anchor {
  flex: none;
  color: var(--muted);
  font-size: 0.95rem;
}

.anchor:visited {
  color: var(--muted);
}

.toc {
  margin: 1.5rem 0;
  padding: 0.75rem 1rem;
  border: 1px solid var(--border);
}

.toc h2 {
  margin: 0 0 0.5rem;
  font-size: 1.05rem;
}

.toc ul {
  margin: 0;
  padding-left: 1.1rem;
}

.toc li + li {
  margin-top: 0.2rem;
}

li + li {
  margin-top: 0.35rem;
}

code {
  padding: 0.05em 0.3em;
  background: var(--subtle-bg);
  font-size: 0.92em;
}

pre {
  overflow-x: auto;
  padding: 0.75rem;
  background: var(--subtle-bg);
}

pre code {
  padding: 0;
}

blockquote {
  margin: 1rem 0;
  padding-left: 1rem;
  border-left: 3px solid var(--border);
  color: var(--muted);
}

hr {
  border: 0;
  border-top: 1px solid var(--border);
  margin: 2rem 0;
}

/* Tables scroll inside their own wrapper; the page never scrolls sideways. */
.table-wrap {
  overflow-x: auto;
  margin: 1rem 0;
}

table {
  border-collapse: collapse;
  min-width: 100%;
  font-size: 0.95rem;
}

th,
td {
  padding: 0.45rem 0.6rem;
  border: 1px solid var(--border);
  text-align: left;
  vertical-align: top;
}

th {
  background: var(--subtle-bg);
}

/* Index and 404 */

.doc-list {
  list-style: none;
  padding: 0;
}

.doc-list li + li {
  margin-top: 0.75rem;
}

.doc-status {
  display: block;
  color: var(--muted);
  font-size: 0.95rem;
}

/* Print: chrome hidden, external link targets printed. The preview banner
   stays: a printed draft still says it is a draft. */
@media print {
  :root {
    --bg: #ffffff;
    --fg: #000000;
    --muted: #333333;
    --link: #000000;
    --link-visited: #000000;
    --border: #777777;
    --subtle-bg: #ffffff;
    --banner-bg: #ffffff;
    --banner-fg: #000000;
  }

  .preview-banner {
    border: 1px solid #000000;
  }

  .skip-link,
  .bar,
  .site-footer,
  .anchor,
  .toc {
    display: none;
  }

  .site-header {
    border: 0;
  }

  .wrap {
    max-width: none;
    padding-inline: 0;
  }

  a[href^="http"]::after {
    content: " (" attr(href) ")";
  }

  .table-wrap {
    overflow: visible;
  }
}