/*
 * Design tokens and components.
 *
 * The brief is `instrument-ui`: this is an instrument, not a dashboard. Every
 * value below is derived from that, and the two things it warns about most are
 * the two things this direction sits closest to.
 *
 * Not "near-black with a bright accent". The ground is warm graphite, the way
 * painted equipment housing is warm, and the two signal colours are indicator
 * lamps — earthy and desaturated — not neon. Nothing glows.
 *
 * Not a newspaper. There are no columns, no masthead, no kickers. Every number
 * is labelled with its unit, its comparison window, and its sample count,
 * because that is the vernacular of measurement rather than editorial.
 */

/* ------------------------------------------------------------------ fonts */

@font-face {
  font-family: 'Plex Condensed';
  src: url('/fonts/ibm-plex-sans-condensed-latin-500-normal.woff2') format('woff2');
  font-weight: 500;
  font-display: swap;
}
@font-face {
  font-family: 'Plex Condensed';
  src: url('/fonts/ibm-plex-sans-condensed-latin-600-normal.woff2') format('woff2');
  font-weight: 600;
  font-display: swap;
}
@font-face {
  font-family: 'Plex Mono';
  src: url('/fonts/ibm-plex-mono-latin-400-normal.woff2') format('woff2');
  font-weight: 400;
  font-display: swap;
}
@font-face {
  font-family: 'Plex Mono';
  src: url('/fonts/ibm-plex-mono-latin-600-normal.woff2') format('woff2');
  font-weight: 600;
  font-display: swap;
}
@font-face {
  font-family: 'Plex Serif';
  src: url('/fonts/ibm-plex-serif-latin-400-normal.woff2') format('woff2');
  font-weight: 400;
  font-display: swap;
}

/* ------------------------------------------------------------------ tokens */

:root {
  /* One neutral ramp. Warm, so it reads as equipment rather than as screen. */
  --ink-000: #131211;
  --ink-050: #191816;
  --ink-100: #23211d;
  --ink-200: #302d28;
  --ink-300: #4a4740;
  --ink-500: #85817a;
  --ink-700: #b6b1a8;
  --ink-900: #e8e4db;

  /* Two signal colours. There is no third, and neither is ever the only
     carrier of meaning — every coloured state also has a glyph and a label. */
  --alert: #c9503a;
  --nominal: #7d9b6a;

  --face-label: 'Plex Condensed', ui-sans-serif, system-ui, sans-serif;
  --face-data: 'Plex Mono', ui-monospace, monospace;
  --face-prose: 'Plex Serif', ui-serif, Georgia, serif;

  /* Nothing below 11px. Small type is acceptable where the region is dense. */
  --t-micro: 11px;
  --t-small: 12px;
  --t-base: 13px;
  --t-mid: 15px;
  --t-large: 20px;
  --t-display: 28px;

  --gap: 4px;
  --pad: 16px;
  --rule: 1px solid var(--ink-100);
}

/* ------------------------------------------------------------------- base */

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

html {
  background: var(--ink-000);
  color-scheme: dark;
}

body {
  margin: 0;
  background: var(--ink-000);
  color: var(--ink-700);
  font-family: var(--face-data);
  font-size: var(--t-base);
  line-height: 1.45;
  /* Every number in the product. Never assumed — stated. */
  font-variant-numeric: tabular-nums;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-decoration: none;
  border-bottom: 1px solid var(--ink-300);
}

a:hover {
  border-bottom-color: var(--ink-700);
}

:focus-visible {
  outline: 2px solid var(--ink-900);
  outline-offset: 2px;
}

/* Silkscreen. Labels on an instrument panel are small, spaced, and shouted
   quietly — this is the one type treatment carrying the product's character. */
.label {
  font-family: var(--face-label);
  font-weight: 600;
  font-size: var(--t-micro);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-500);
}

.num {
  font-family: var(--face-data);
  font-variant-numeric: tabular-nums;
}

/* Interpretation, visibly not measurement. The reader must be able to see
   where one ends and the other begins; this is that rule made visual. */
.prose {
  font-family: var(--face-prose);
  font-size: var(--t-mid);
  line-height: 1.5;
  color: var(--ink-900);
  max-width: 62ch;
}

.shell {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 var(--pad);
}

/* ----------------------------------------------------------------- header */

.masthead {
  border-bottom: var(--rule);
  padding: 14px 0 12px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px var(--pad);
  align-items: baseline;
  justify-content: space-between;
}

.wordmark {
  font-family: var(--face-label);
  font-weight: 600;
  font-size: var(--t-mid);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--ink-900);
  border: 0;
}

.reading-age {
  display: flex;
  gap: 18px;
  align-items: baseline;
  font-size: var(--t-small);
  color: var(--ink-500);
}

.reading-age strong {
  color: var(--ink-700);
  font-weight: 400;
}

/* Stale data is stated, never hidden. Past twice the expected cadence the
   header says so in words, not by a colour a reader has to decode. */
.stale {
  color: var(--alert);
  border-left: 2px solid var(--alert);
  padding-left: 8px;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 2px;
  border-bottom: var(--rule);
  padding: 0;
  margin: 0;
  list-style: none;
}

.nav a {
  display: block;
  padding: 9px 14px 8px;
  border: 0;
  border-bottom: 2px solid transparent;
  font-family: var(--face-label);
  font-weight: 600;
  font-size: var(--t-micro);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-500);
}

.nav a:hover {
  color: var(--ink-900);
}

.nav a[aria-current='page'] {
  color: var(--ink-900);
  border-bottom-color: var(--ink-900);
}

.nav a[data-pending='true'] {
  color: var(--ink-300);
}

/* ---------------------------------------------------------- velocity strip */

.strip {
  padding: 20px 0 10px;
  border-bottom: var(--rule);
}

.strip svg {
  display: block;
  width: 100%;
  height: 96px;
}

.strip-scale {
  display: flex;
  justify-content: space-between;
  padding-top: 6px;
}

.strip-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  padding-top: 10px;
}

.mark-quiet {
  fill: var(--ink-300);
}
.mark-detected {
  fill: var(--ink-900);
}
.mark-confirmed {
  fill: var(--alert);
}
.mark-growth {
  fill: var(--nominal);
}
/* Baseline still forming. Drawn as an outline, because "not measured yet" is
   not the same claim as "measured at zero" and must not look like it. */
.mark-forming {
  fill: none;
  stroke: var(--ink-200);
  stroke-width: 0.4;
}

.baseline-rule {
  stroke: var(--ink-500);
  stroke-width: 0.5;
  stroke-dasharray: 3 3;
}

/* ------------------------------------------------------------------ tables */

.readout {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--t-small);
}

.readout caption {
  text-align: left;
  padding: 18px 0 8px;
}

.readout th {
  text-align: left;
  font-family: var(--face-label);
  font-weight: 600;
  font-size: var(--t-micro);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-500);
  padding: 6px 12px 6px 0;
  border-bottom: var(--rule);
  white-space: nowrap;
}

.readout td {
  padding: 5px 12px 5px 0;
  border-bottom: 1px solid var(--ink-050);
  vertical-align: baseline;
}

.readout tr:hover td {
  background: var(--ink-050);
}

.readout .n {
  text-align: right;
  padding-right: 18px;
}

.readout .dim {
  color: var(--ink-500);
}

.wrap {
  overflow-x: auto;
}

/* ------------------------------------------------------------------ states */

.state {
  font-family: var(--face-label);
  font-weight: 600;
  font-size: var(--t-micro);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  white-space: nowrap;
}

.state::before {
  margin-right: 6px;
}

.state-forming {
  color: var(--ink-500);
}
.state-forming::before {
  content: '○';
}

.state-detected {
  color: var(--ink-900);
}
.state-detected::before {
  content: '◐';
}

.state-confirmed {
  color: var(--alert);
}
.state-confirmed::before {
  content: '●';
}

/* ------------------------------------------------------------------ panels */

.notice {
  border-left: 2px solid var(--ink-200);
  padding: 12px 0 12px 14px;
  margin: 20px 0;
  color: var(--ink-500);
  font-size: var(--t-small);
  max-width: 68ch;
}

.notice strong {
  display: block;
  font-family: var(--face-label);
  font-weight: 600;
  font-size: var(--t-micro);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-700);
  margin-bottom: 5px;
}

.notice-alert {
  border-left-color: var(--alert);
}

/* The only card in the product: a confirmed event that has written prose
   attached. Everything else is a row. */
.finding {
  border-top: var(--rule);
  padding: 18px 0;
  display: grid;
  gap: 10px;
}

.finding-head {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  align-items: baseline;
}

.finding-repo {
  font-size: var(--t-mid);
  color: var(--ink-900);
}

.finding-metrics {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 24px;
}

.metric {
  display: grid;
  gap: 1px;
}

.metric-value {
  font-size: var(--t-base);
  color: var(--ink-900);
}

/* ------------------------------------------------------------- repo page */

.repo-head {
  padding: 26px 0 14px;
  border-bottom: var(--rule);
}

.repo-title {
  font-family: var(--face-data);
  font-weight: 400;
  font-size: var(--t-display);
  color: var(--ink-900);
  margin: 0 0 8px;
  overflow-wrap: anywhere;
}

.repo-facts {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 20px;
}

.chart {
  margin: 24px 0 0;
}

.chart svg {
  display: block;
  width: 100%;
  height: 84px;
  margin-top: 8px;
}

.chart figcaption {
  display: block;
}

/* The timeline is the page's structure, not a tab among tabs. The gap rows
   carry elapsed time, which is the fact that turns adjacent events into a
   sequence a reader can reason about. */
.timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  border-left: 1px solid var(--ink-100);
}

.tl-gap {
  padding: 6px 0 6px 18px;
  position: relative;
}

.tl-gap::before {
  content: '';
  position: absolute;
  left: -1px;
  top: 0;
  bottom: 0;
  width: 1px;
  background: repeating-linear-gradient(
    to bottom,
    var(--ink-200) 0 3px,
    transparent 3px 6px
  );
}

.tl-entry {
  display: grid;
  grid-template-columns: 132px minmax(0, 1fr);
  gap: 4px 18px;
  padding: 14px 0 16px 18px;
  position: relative;
}

.tl-entry::before {
  content: '';
  position: absolute;
  left: -3px;
  top: 20px;
  width: 5px;
  height: 5px;
  background: var(--ink-500);
}

.tl-when {
  display: grid;
  gap: 1px;
  font-size: var(--t-small);
  color: var(--ink-900);
}

.tl-metrics {
  display: flex;
  flex-wrap: wrap;
  gap: 2px 20px;
  font-size: var(--t-small);
  padding-top: 4px;
}

.tl-metric .label {
  display: inline;
}

@media (max-width: 640px) {
  .tl-entry {
    grid-template-columns: minmax(0, 1fr);
  }
  .repo-title {
    font-size: var(--t-large);
  }
}

.colophon {
  border-top: var(--rule);
  margin-top: 36px;
  padding: 20px 0 44px;
  color: var(--ink-500);
  font-size: var(--t-micro);
  display: grid;
  gap: 8px;
  max-width: 76ch;
}

@media (max-width: 640px) {
  :root {
    --pad: 12px;
  }
  .strip svg {
    height: 64px;
  }
  .readout {
    font-size: var(--t-micro);
  }
}

/* No animation in this product encodes a value, so there is none to reduce.
   The declaration stays as a guard against anyone adding decoration later. */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}