/* Styling for the /impact/ section and the homepage statistics strip.
 *
 * Kept in a standalone stylesheet rather than in the theme's Sass pipeline so
 * that the remote Minimal Mistakes theme stays untouched and upgradable. Only
 * `.impact-*` classes are defined here; nothing overrides a theme selector.
 *
 * The categorical slots are the validated default data-visualisation palette.
 * Both modes were checked with the palette validator against the surfaces this
 * page actually renders on (#ffffff light, #1a1a19 dark): lightness band,
 * chroma floor, colourblind separation, normal-vision separation and contrast
 * all pass. Two light-mode slots sit below 3:1 against white, so every chart
 * ships direct value labels and a table beside it, which is the required
 * relief.
 */

.impact {
  --impact-surface: #ffffff;
  --impact-surface-raised: #f8f8f6;
  --impact-ink: #0b0b0b;
  --impact-ink-secondary: #52514e;
  --impact-ink-muted: #6d6b66;
  --impact-grid: #e1e0d9;
  --impact-axis: #c3c2b7;
  --impact-border: rgba(11, 11, 11, 0.12);

  --impact-sequential: #2a78d6;
  --impact-series-1: #2a78d6;
  --impact-series-2: #eb6834;
  --impact-series-3: #1baf7a;
  --impact-series-4: #eda100;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .impact {
    --impact-surface: #1a1a19;
    --impact-surface-raised: #222220;
    --impact-ink: #ffffff;
    --impact-ink-secondary: #c3c2b7;
    --impact-ink-muted: #898781;
    --impact-grid: #2c2c2a;
    --impact-axis: #383835;
    --impact-border: rgba(255, 255, 255, 0.14);

    --impact-sequential: #3987e5;
    --impact-series-1: #3987e5;
    --impact-series-2: #d95926;
    --impact-series-3: #199e70;
    --impact-series-4: #c98500;
  }
}

:root[data-theme="dark"] .impact {
  --impact-surface: #1a1a19;
  --impact-surface-raised: #222220;
  --impact-ink: #ffffff;
  --impact-ink-secondary: #c3c2b7;
  --impact-ink-muted: #898781;
  --impact-grid: #2c2c2a;
  --impact-axis: #383835;
  --impact-border: rgba(255, 255, 255, 0.14);

  --impact-sequential: #3987e5;
  --impact-series-1: #3987e5;
  --impact-series-2: #d95926;
  --impact-series-3: #199e70;
  --impact-series-4: #c98500;
}

/* ---------------------------------------------------------------- headline */

.impact-headline {
  display: flex;
  flex-wrap: wrap;
  gap: 1em 2.5em;
  align-items: baseline;
  justify-content: center;
  margin: 1.5em 0 1em;
  padding: 0;
  list-style: none;
}

.impact-headline__item {
  display: flex;
  flex-direction: column;
  align-items: center;
  min-width: 8em;
}

.impact-headline__value {
  font-size: 1.9em;
  font-weight: 700;
  line-height: 1.1;
  color: var(--impact-ink);
}

/* Deliberately not uppercased: "DBMSs supported" becomes "DBMSS SUPPORTED",
 * which reads as a typo. */
.impact-headline__label {
  font-size: 0.85em;
  letter-spacing: 0.01em;
  color: var(--impact-ink-secondary);
}

/* On the splash hero the strip sits on the dark overlay. */
.page__hero--overlay .impact-headline__value,
.page__hero--overlay .impact-headline__label {
  color: #fff;
}

/* ------------------------------------------------------------- stat tiles */

.impact-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(11em, 1fr));
  gap: 1em;
  margin: 1.5em 0 2em;
  padding: 0;
  list-style: none;
}

.impact-stat {
  padding: 1em 1.1em;
  border: 1px solid var(--impact-border);
  border-radius: 6px;
  background: var(--impact-surface-raised);
}

.impact-stat__value {
  display: block;
  font-size: 1.8em;
  font-weight: 700;
  line-height: 1.15;
  color: var(--impact-ink);
}

.impact-stat__label {
  display: block;
  margin-top: 0.2em;
  font-size: 0.82em;
  color: var(--impact-ink-secondary);
}

/* ----------------------------------------------------------------- charts */

.impact-figure {
  margin: 1.5em 0 2em;
}

.impact-figure__caption {
  margin: 0 0 0.6em;
  font-size: 0.85em;
  color: var(--impact-ink-secondary);
}

.impact-chart {
  display: block;
  overflow: visible;
  font-family: inherit;
}

.impact-chart__scroll {
  overflow-x: auto;
  padding-bottom: 0.25em;
}

.impact-chart__label,
.impact-chart__tick {
  font-size: 11px;
  fill: var(--impact-ink-muted);
}

.impact-chart__value {
  font-size: 11px;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  fill: var(--impact-ink-secondary);
}

.impact-chart__value--tiny {
  font-size: 9px;
  font-weight: 500;
}

.impact-chart__grid {
  stroke: var(--impact-grid);
  stroke-width: 1;
}

.impact-chart__axis {
  stroke: var(--impact-axis);
  stroke-width: 1;
}

/* ----------------------------------------------------------------- legend */

.impact-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35em 1.2em;
  margin: 0 0 0.6em;
  padding: 0;
  list-style: none;
  font-size: 0.85em;
  color: var(--impact-ink-secondary);
}

.impact-legend__item {
  display: flex;
  align-items: center;
  gap: 0.4em;
}

.impact-legend__swatch {
  width: 0.75em;
  height: 0.75em;
  border-radius: 2px;
  flex: none;
}

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

.impact-table-wrap {
  overflow-x: auto;
}

.impact-table {
  width: 100%;
  font-size: 0.82em;
  border-collapse: collapse;
}

.impact-table th,
.impact-table td {
  padding: 0.35em 0.6em;
  border-bottom: 1px solid var(--impact-border);
  text-align: left;
  vertical-align: top;
}

.impact-table td.impact-num,
.impact-table th.impact-num {
  text-align: right;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.impact-details {
  margin: 0.5em 0 2em;
}

.impact-details > summary {
  cursor: pointer;
  font-size: 0.88em;
  color: var(--impact-ink-secondary);
}

/* ------------------------------------------------------------------ misc */

.impact-tag {
  display: inline-block;
  padding: 0.05em 0.5em;
  margin-right: 0.25em;
  border: 1px solid var(--impact-border);
  border-radius: 999px;
  font-size: 0.85em;
  white-space: nowrap;
  color: var(--impact-ink-secondary);
}

.impact-evidence {
  margin: 0.3em 0 0;
  padding-left: 0.8em;
  border-left: 3px solid var(--impact-grid);
  font-size: 0.9em;
  color: var(--impact-ink-secondary);
}

/* Evidence links are permalinks with 40-character commit SHAs in them. Without
 * this they are a single unbreakable word and push the whole page sideways. */
.impact-evidence a,
.impact-table a,
.impact a[href*="://"] {
  overflow-wrap: anywhere;
  word-break: break-word;
}

/* A model-written summary. Deliberately styled unlike .impact-evidence: that
 * one quotes a source, this one does not, and a reader must be able to tell
 * which is which at a glance rather than by reading the caption. */
.impact-summary {
  margin: 0.4em 0 0.2em;
  font-size: 0.95em;
  color: var(--impact-ink-secondary);
}

/* What the paper is about, secondary to what it did with SQLancer. */
.impact-summary .impact-about {
  display: block;
  margin-top: 0.35em;
  font-size: 0.92em;
  color: var(--impact-ink-muted, var(--impact-ink-secondary));
}

.impact-summary .impact-meta {
  display: block;
  margin-top: 0.2em;
  font-style: italic;
}

.impact-note {
  padding: 0.8em 1em;
  border-left: 3px solid var(--impact-series-1);
  background: var(--impact-surface-raised);
  font-size: 0.9em;
}

.impact-policy__rule {
  margin: 0.35em 0;
}

.impact-policy__kind {
  display: inline-block;
  min-width: 5.5em;
  font-size: 0.78em;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--impact-ink-muted);
}

.impact-meta {
  font-size: 0.82em;
  color: var(--impact-ink-muted);
}

/* ------------------------------------------------ per-system detail pages */

.impact-breadcrumb {
  font-size: 0.9em;
  margin: 0 0 1em;
}

/* Bars drawn in HTML rather than SVG. The shared page charts are generated
 * files reviewed in a diff; these are per-system and there are hundreds, so
 * they are rendered from the data instead. One hue, because the job is
 * magnitude, and every row carries its number as well as its bar. */
.impact-bars {
  margin: 0 0 1.2em;
}

.impact-bars__row {
  display: grid;
  grid-template-columns: minmax(6em, 12em) 1fr;
  align-items: center;
  gap: 0 0.7em;
  margin: 0 0 0.3em;
}

.impact-bars__label {
  font-size: 0.85em;
  color: var(--impact-ink-secondary);
  overflow-wrap: anywhere;
}

.impact-bars__value {
  display: flex;
  align-items: center;
  gap: 0.5em;
  margin: 0;
  min-width: 0;
}

.impact-bars__bar {
  display: block;
  height: 14px;
  min-width: 2px;
  border-radius: 4px;
  background: var(--impact-sequential);
}

.impact-bars__count {
  font-size: 0.8em;
  font-variant-numeric: tabular-nums;
  font-weight: 600;
  color: var(--impact-ink-secondary);
  white-space: nowrap;
}

.impact-columns {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 20em), 1fr));
  gap: 0 2em;
}

.impact-columns h3 {
  margin-top: 0.6em;
}

.impact-adoption {
  margin: 0 0 1.4em;
}

.impact-adoption__heading {
  margin: 0 0 0.3em;
  font-size: 1em;
  text-transform: capitalize;
}

/* A long bug list is the point of a system's page, but it should not be the
 * whole viewport. It scrolls in place once it is taller than a screenful. */
.impact-table--bugs {
  font-size: 0.9em;
}

.impact-table--bugs tbody {
  font-variant-numeric: tabular-nums;
}

.impact-row--rejected {
  opacity: 0.62;
}

.impact-row--rejected th::after {
  content: " (rejected)";
  color: var(--impact-ink-muted);
  font-weight: 400;
}

/* A chart bar that links somewhere. The hover cue has to be visible against
 * both the bar fill and the page surface, so it is an outline rather than a
 * colour change, which would collide with the categorical palette. */
.impact-chart a {
  cursor: pointer;
}

.impact-chart a:hover .impact-chart__bar,
.impact-chart a:focus-visible .impact-chart__bar {
  stroke: var(--impact-ink);
  stroke-width: 1.5;
}

.impact-chart a:hover .impact-chart__label,
.impact-chart a:focus-visible .impact-chart__label {
  fill: var(--impact-ink);
  text-decoration: underline;
}

/* A frame captured from a talk. It sits between the mention's timestamp and
 * the note explaining it, so it is bounded rather than full-bleed: a slide is
 * evidence here, not an illustration, and at page width it would read as one. */
.impact-frame {
  margin: 0.5em 0 0.75em;
  max-width: 34em;
}

.impact-frame img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--impact-rule, #d8d8d8);
  border-radius: 3px;
}

.impact-frame figcaption {
  margin-top: 0.35em;
}

/* A slide from someone's talk, shown with the talk it came from. The image
 * carries it, so the caption stays quiet underneath; and a slide is never
 * narrowed past the point where its own text can be read -- which is the only
 * reason to show a slide rather than describe it. */
.impact-slide {
  margin: 0.75em 0 1.25em;
  max-width: 32em;
}

.impact-slide img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--impact-rule, #d8d8d8);
  border-radius: 3px;
}

.impact-slide figcaption {
  margin-top: 0.4em;
}