/*
 * The readable pages — the station, the six subsystems, how it works.
 *
 * The same console the application is set in: one monospaced face, the same four grounds and the
 * same text ramp, the values from src/index.css copied here because these pages do not load the
 * application's stylesheet and should not — they are eight kilobytes of prose each, and the
 * application's sheet is sized for a dashboard. Contrast is the ramp that already clears AA:
 * text 8.7:1, dim 6.6:1, idle 5.0:1 on the panel ground.
 *
 * Prose, not a dashboard: a measure of about 72 characters, generous leading, and nothing that
 * moves. The one thing kept from the console is the eyebrow — the small uppercase line over a
 * heading — because it is how the application labels a section and the pages should read as the
 * same place.
 */
:root {
  --bg: #05080c;
  --bg-panel: #090e15;
  --bg-panel-alt: #0d1720;
  --border: #16202c;
  --border-strong: #243545;
  --text: #9fb0c3;
  --text-dim: #8698b0;
  --text-strong: #e6edf5;
  --idle: #70839a;
  --live: #4ade80;
  --mono: ui-monospace, 'Cascadia Mono', Consolas, monospace;
  color-scheme: dark;
}

* {
  box-sizing: border-box;
}

html {
  background: var(--bg);
  color: var(--text);
  font: 15px/1.6 var(--mono);
  -webkit-font-smoothing: antialiased;
}

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* The underline is the cue that this is a link, so it is drawn in a colour that can be seen:
   --border-strong on the ground was 1.6:1, close to invisible; --text-dim is 6.6:1. */
a {
  color: var(--text-strong);
  text-decoration: underline;
  text-decoration-color: var(--text-dim);
  text-underline-offset: 3px;
}

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

code {
  font-family: var(--mono);
  font-size: 0.92em;
  color: var(--text-strong);
}

/* --- Header and footer, shared by every page --- */

.site {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 22px;
  padding: 14px 24px;
  border-bottom: 1px solid var(--border);
  background: var(--bg-panel);
}

.site__brand {
  font-size: 16px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--text-strong);
}

.site__nav {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 18px;
  font-size: 12px;
}

.site__nav a {
  color: var(--text-dim);
  text-decoration: none;
  padding: 4px 0;
}

.site__nav a:hover,
.site__nav a[aria-current='page'] {
  color: var(--text-strong);
  box-shadow: inset 0 -2px 0 var(--text-dim);
}

.site__foot {
  margin-top: auto;
  padding: 20px 24px 28px;
  border-top: 1px solid var(--border);
  background: var(--bg-panel);
  font-size: 12px;
  color: var(--text-dim);
}

.site__foot p {
  max-width: 72ch;
  margin: 0;
}

/* --- The page --- */

.page {
  width: min(100% - 48px, 76ch);
  margin: 0 auto;
  padding: 36px 0 56px;
}

.eyebrow {
  margin: 0 0 6px;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--text-dim);
}

h1 {
  margin: 0 0 14px;
  font-size: 30px;
  line-height: 1.2;
  font-weight: 600;
  color: var(--text-strong);
  text-wrap: balance;
}

h2 {
  margin: 0 0 12px;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--text-dim);
}

.lead {
  margin: 0 0 12px;
  font-size: 17px;
  line-height: 1.55;
  color: var(--text);
  text-wrap: pretty;
}

.note {
  margin: 0 0 8px;
  font-size: 13px;
  color: var(--text-dim);
  text-wrap: pretty;
}

.block {
  margin-top: 36px;
  padding-top: 18px;
  border-top: 1px solid var(--border);
}

.block p {
  margin: 0 0 12px;
  text-wrap: pretty;
}

/* --- Channels: a term, its symbol, and the sentence that explains it --- */

.channels {
  margin: 0;
}

.channel {
  padding: 12px 0;
  border-bottom: 1px solid var(--border);
}

.channel:last-child {
  border-bottom: 0;
}

.channel dt {
  font-weight: 600;
  color: var(--text-strong);
}

.channel__meta {
  margin-left: 8px;
  font-weight: 400;
  font-size: 12px;
  color: var(--idle);
}

.channel dd {
  margin: 4px 0 0;
  color: var(--text);
  text-wrap: pretty;
}

/* The channels that have no explanation yet: named, with their symbol and unit, in one line each. */
.bare {
  margin: 0 0 8px;
  padding: 0 0 0 1.2em;
  color: var(--text);
}

.bare li {
  padding: 2px 0;
}

/* --- Parts --- */

.parts {
  list-style: none;
  margin: 0;
  padding: 0;
}

.parts li {
  padding: 12px 0;
  border-bottom: 1px solid var(--border);
}

.parts li:last-child {
  border-bottom: 0;
}

.parts__name {
  font-weight: 600;
}

.parts__designation {
  margin-left: 8px;
  font-size: 12px;
  color: var(--idle);
}

.parts p {
  margin: 4px 0 0;
}

.parts__reports {
  font-size: 13px;
  color: var(--text-dim);
}

/* --- The reference table --- */

.refs {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}

.refs th,
.refs td {
  padding: 10px 12px 10px 0;
  vertical-align: top;
  text-align: left;
  border-bottom: 1px solid var(--border);
}

.refs th {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-dim);
  font-weight: 500;
}

.refs td:first-child {
  width: 42%;
  padding-right: 20px;
}

/* --- Previous / next --- */

.pager {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  margin-top: 36px;
  padding-top: 18px;
  border-top: 1px solid var(--border);
  font-size: 13px;
}

@media (max-width: 600px) {
  .site {
    padding: 12px 16px;
  }

  .page {
    width: min(100% - 32px, 76ch);
    padding-top: 24px;
  }

  h1 {
    font-size: 24px;
  }

  /*
   * Still a table on a phone. Flattening it to blocks and hiding the header row read better in
   * a screenshot and took the table's semantics with it: a screen reader heard fifteen rows of
   * loose text with no "Document" / "What it settles" pairing. Two columns fit a phone as they
   * are; the first just gives up its fixed share.
   */
  .refs td:first-child {
    width: auto;
    padding-right: 12px;
  }

  .refs {
    font-size: 12px;
  }
}