/* chatimix.com. Colours are design/tokens.json (dark, then light), type is
   DM Mono 400/500, radius 2, no shadows, gradients or accent colour. */

@font-face {
  font-family: "DM Mono";
  src: url("/fonts/DMMono-Regular.ttf") format("truetype");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "DM Mono";
  src: url("/fonts/DMMono-Medium.ttf") format("truetype");
  font-weight: 500;
  font-style: normal;
  font-display: swap;
}

:root {
  color-scheme: dark;
  --bg: #0b0b0a;
  --fg: #f0eeec;
  --su: #a6a29b;
  --mu: #7d7a73;
  --dim: #4a4843;
  --bd: #2c2a27;
  --ln: #1e1d1a;
  --fl: #1a1917;
  --out: #3a3834;
}
@media (prefers-color-scheme: light) {
  :root {
    color-scheme: light;
    --bg: #f4f2ee;
    --fg: #141312;
    --su: #45423d;
    --mu: #6b675f;
    --dim: #aaa59d;
    --bd: #cfcac2;
    --ln: #e3e0da;
    --fl: #e8e5df;
    --out: #b3aea5;
  }
}

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

html {
  background: var(--bg);
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}
body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--bg);
  color: var(--fg);
  font-family: "DM Mono", ui-monospace, monospace;
  font-weight: 400;
  font-size: 0.875rem;   /* body 14 */
  line-height: 1.5;
  overflow-wrap: break-word;
}
main { flex: 1; width: 100%; }

a { color: inherit; text-decoration: underline; text-decoration-color: var(--out); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { text-decoration-color: var(--fg); }
:focus-visible { outline: 2px solid var(--fg); outline-offset: 2px; border-radius: 2px; }
strong { font-weight: 500; color: var(--fg); }
code {
  font: inherit;
  color: var(--fg);
  background: var(--fl);
  border: 1px solid var(--ln);
  border-radius: 2px;
  padding: 0 4px;
}
::selection { background: var(--fg); color: var(--bg); }

.skip {
  position: absolute;
  inset-inline-start: 16px;
  top: -48px;
  background: var(--fg);
  color: var(--bg);
  padding: 8px 12px;
  border-radius: 2px;
  text-decoration: none;
  z-index: 1;
}
.skip:focus { top: 8px; }

/* Labels: uppercase only here and in tags (label 10.5 / 16, tracking .12em). */
.label {
  display: block;
  font-size: 0.65625rem;
  line-height: 16px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--mu);
}

/* Top bar: brand, then the tab row (one row from 600). */
.top {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  column-gap: 24px;
  padding: 12px 16px 0;
  border-bottom: 1px solid var(--ln);
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-height: 44px;
  text-decoration: none;
  margin-bottom: 8px;
}
.mark { display: block; width: 32px; height: 32px; flex: none; }
.mark-tile { fill: var(--fg); }
.mark-glyph { fill: var(--bg); }
.wordmark {
  font-size: 0.6875rem;   /* 11, CX 01 1a */
  letter-spacing: 0.2em;
  color: var(--mu);
}
.nav {
  display: flex;
  flex-basis: 100%;
  gap: 18px;
  font-size: 0.8125rem;   /* tabs 13 */
}
.nav a {
  display: flex;
  align-items: center;
  min-height: 44px;
  padding-top: 4px;
  color: var(--mu);
  text-decoration: none;
  border-bottom: 2px solid transparent;
  white-space: nowrap;
}
.nav a:hover { color: var(--fg); }
.nav a[aria-current="page"] { color: var(--fg); font-weight: 500; border-bottom-color: var(--fg); }

@media (min-width: 600px) {
  .top { padding: 0 24px; flex-wrap: nowrap; }
  .brand { margin-bottom: 0; min-height: 56px; }
  .nav { flex-basis: auto; margin-inline-start: auto; align-self: stretch; gap: 24px; }
  .nav a { min-height: 56px; }
}

/* Footer */
.foot {
  border-top: 1px solid var(--ln);
  padding: 20px 16px 28px;
  font-size: 0.75rem;   /* small 12 */
  color: var(--mu);
}
.foot nav { display: flex; flex-wrap: wrap; column-gap: 20px; row-gap: 4px; }
.foot nav a { color: var(--su); text-decoration: none; min-height: 44px; display: inline-flex; align-items: center; }
.foot nav a:hover { color: var(--fg); text-decoration: underline; }
.foot p { margin: 8px 0 0; }
@media (min-width: 600px) { .foot { padding: 20px 24px 28px; } }

/* Documents: privacy, terms, help, open source, 404. Detail width 560. */
.prose {
  max-width: 560px;
  margin: 0 auto;
  padding: 28px 16px 48px;
  color: var(--su);
}
.prose h1 {
  margin: 0;
  color: var(--fg);
  font-size: 1.5rem;     /* display 24 */
  font-weight: 500;
  line-height: 1.25;
}
.prose h2 {
  margin: 36px 0 0;
  color: var(--fg);
  font-size: 1.125rem;   /* large 18 */
  font-weight: 500;
  line-height: 1.4;
  scroll-margin-top: 16px;
}
.prose h3 {
  margin: 24px 0 0;
  color: var(--fg);
  font-size: 0.875rem;
  font-weight: 500;
  scroll-margin-top: 16px;
}
.prose p { margin: 12px 0 0; }
.prose ul, .prose ol { margin: 12px 0 0; padding: 0; }
.prose ul { list-style: none; }
.prose ul > li { position: relative; padding-inline-start: 20px; }
.prose ul > li::before { content: "-"; position: absolute; inset-inline-start: 0; color: var(--mu); }
.prose ol { padding-inline-start: 28px; }
.prose ol > li::marker { color: var(--mu); }
.prose li + li { margin-top: 6px; }
@media (min-width: 840px) {
  .prose { padding-top: 48px; }
  .prose h1 { font-size: 1.75rem; }   /* desktop title 28, CX 15 */
}

/* The draft notice on the legal pages. */
.draft {
  margin: 20px 0 0;
  padding: 12px 16px;
  background: var(--fl);
  border: 1px solid var(--bd);
  border-radius: 2px;
  color: var(--fg);
}
.draft .label { color: var(--fg); }
.draft p { margin: 4px 0 0; font-weight: 500; }

.toc { margin: 24px 0 0; padding: 12px 0 0; border-top: 1px solid var(--ln); font-size: 0.8125rem; }
.toc ul { margin: 6px 0 0; }
.toc li + li { margin-top: 2px; }
.toc a { color: var(--su); text-decoration: none; display: inline-block; padding: 2px 0; }
.toc a:hover { color: var(--fg); text-decoration: underline; }
@media (min-width: 600px) { .toc ul { columns: 2; column-gap: 24px; } .toc li { break-inside: avoid; } }

/* Home */
.wrap { max-width: 840px; margin: 0 auto; padding: 0 16px; }
.hero { padding: 48px 0 40px; border-bottom: 1px solid var(--ln); }
.hero h1 {
  margin: 0;
  font-size: 1.5rem;
  font-weight: 500;
  line-height: 1.2;
}
.hero .sub { margin: 14px 0 0; max-width: 480px; font-size: 0.8125rem; line-height: 1.6; color: var(--mu); }
.hero .lead { margin: 20px 0 0; max-width: 560px; color: var(--su); }
.cursor {
  display: inline-block;
  width: 0.22em;
  height: 0.94em;
  margin-inline-start: 0.12em;
  vertical-align: -0.1em;
  background: var(--fg);
  animation: blink 1s steps(1) 6;
}
@keyframes blink { 50% { visibility: hidden; } }
@media (prefers-reduced-motion: reduce) { .cursor { animation: none; } }
@media (min-width: 600px) {
  .wrap { padding: 0 24px; }
  .hero { padding: 72px 0 56px; }
  .hero h1 { font-size: 1.875rem; }   /* 30, CX 01 1a */
}

.section { padding: 32px 0 8px; }
.section > p { margin: 10px 0 0; max-width: 560px; color: var(--su); }
.rows { list-style: none; margin: 10px 0 0; padding: 0; border-top: 1px solid var(--ln); }
.rows > li {
  display: grid;
  grid-template-columns: 1fr;
  row-gap: 6px;
  padding: 12px 0;
  border-bottom: 1px solid var(--ln);
}
.rows .name { font-weight: 500; }
.rows .text { margin: 0; color: var(--su); }
.rows .note { display: block; margin-top: 2px; color: var(--mu); font-size: 0.75rem; }
@media (min-width: 600px) {
  .rows > li { grid-template-columns: 136px 1fr; column-gap: 16px; align-items: baseline; }
}

/* Network tags: uppercase, never translated, never brand-coloured. Chatimix
   is filled, every other network outlined (the network rule). */
.tag {
  justify-self: start;
  display: inline-block;
  font-size: 0.65625rem;
  line-height: 16px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 1px 6px;
  border-radius: 2px;
  color: var(--su);
  box-shadow: inset 0 0 0 1px var(--out);
  direction: ltr;
  unicode-bidi: isolate;
}
.tag.filled { background: var(--bd); color: var(--fg); box-shadow: none; }

.facts { list-style: none; margin: 10px 0 0; padding: 0; color: var(--su); max-width: 640px; }
.facts li { position: relative; padding-inline-start: 20px; }
.facts li + li { margin-top: 6px; }
.facts li::before { content: "-"; position: absolute; inset-inline-start: 0; color: var(--mu); }
.section:last-child { padding-bottom: 56px; }