/* Shared styles for the site's plain pages (404, about, privacy, terms). The
   chat app has its own stylesheet, web/app.css, with the same colours. */

:root {
  --bg: #0f1115;
  --panel: #171a21;
  --line: #2a2f3a;
  --text: #e6e8ee;
  --muted: #8b93a7;
  --accent: #6ea8fe;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.6 system-ui, -apple-system, "Segoe UI", sans-serif;
}

a { color: var(--accent); }

.site-header {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  padding: .8rem 1.25rem;
  background: var(--panel);
  border-bottom: 1px solid var(--line);
}
/* The credit ribbon, matching the chat page's (web/app.css .ribbon). */
.ribbon {
  flex: none;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: .1rem .6rem;
  padding: .3rem 1rem;
  font-size: 11px;
  color: var(--muted);
  background: var(--bg);
  border-top: 1px solid var(--line);
}
/* inline-block, so a link's underline and colour do not extend to the dot. */
.ribbon > * + *::before { content: "·"; display: inline-block; margin-right: .6rem; color: #4a5162; }

.site-header .brand {
  display: flex;
  align-items: center;
  gap: .5rem;
  color: var(--text);
  font-weight: 600;
  text-decoration: none;
}
.site-header .brand img { width: 22px; height: 22px; }
.site-header nav { display: flex; gap: 1rem; margin-left: auto; }
.site-header nav a { color: var(--muted); text-decoration: none; }
.site-header nav a:hover, .site-header nav a[aria-current="page"] { color: var(--text); }

main {
  flex: 1;
  width: 100%;
  max-width: 44rem;
  margin: 0 auto;
  padding: 3rem 1.25rem;
}

h1 { font-size: 1.6rem; margin: 0 0 .75rem; }
.muted { color: var(--muted); }

/* The legal pages (privacy.html, terms.html). */
main h2 { font-size: 1.15rem; margin: 2rem 0 .5rem; }
main h3 { font-size: 1rem; margin: 1.25rem 0 .4rem; }
main li + li { margin-top: .3rem; }
.updated { color: var(--muted); font-size: 14px; margin-top: 0; }
/* An unwritten placeholder, styled to stand out. Nothing with this class
   should reach the live site. */
.todo {
  color: #1a1206;
  background: #e0a458;
  border-radius: 4px;
  padding: 0 .3rem;
  font-weight: 600;
}

/* A diagram on a plain page (about.html): a white drawing on the dark page. */
.diagram { margin: 1.25rem 0; }
.diagram img { display: block; width: 100%; height: auto; border-radius: 6px; }
.diagram figcaption { color: var(--muted); font-size: 14px; margin-top: .4rem; }