*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  color-scheme: light dark;
}

body {
  background: Canvas;
  color: CanvasText;
  font-family: ui-monospace, "Cascadia Code", "Source Code Pro", Menlo, Consolas,
    "DejaVu Sans Mono", monospace;
  font-size: 1rem;
  line-height: 1.4;
  max-width: 900px;
  margin: 0 auto;
  padding: 24px;
}

:focus-visible {
  outline: 2px solid Highlight;
  outline-offset: 2px;
}

/* ---- Header ---- */

header {
  display: flex;
  align-items: baseline;
  gap: 24px;
  margin-bottom: 24px;
  border-bottom: 1px solid ButtonBorder;
  padding-bottom: 16px;
}

.github-link {
  margin-left: auto;
  color: GrayText;
  line-height: 1;
}

.github-link:hover {
  color: CanvasText;
}

h1 {
  font-size: 1.25rem;
  font-weight: 600;
}

.controls {
  display: flex;
  align-items: baseline;
  gap: 8px;
}

.controls label {
  color: GrayText;
}

.controls select {
  font-family: inherit;
  font-size: inherit;
  background: Field;
  color: FieldText;
  border: 1px solid ButtonBorder;
  padding: 2px 4px;
}

main {
  overflow-x: auto;
}

/* ---- Matrix table ---- */

.matrix {
  border-collapse: collapse;
  width: 100%;
}

.matrix-os-header {
  font-weight: 600;
  text-align: center;
  padding: 4px 8px;
  border-bottom: 1px solid ButtonBorder;
}

.matrix-browser-header {
  text-align: left;
  padding: 4px 8px;
  color: GrayText;
  border-bottom: 1px solid ButtonBorder;
  font-weight: normal;
}

.matrix-group-label {
  padding: 12px 0 4px;
  font-weight: 600;
  color: GrayText;
  border-bottom: 1px solid ButtonBorder;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  text-align: left;
}

tbody:first-of-type .matrix-group-label {
  padding-top: 4px;
}

.matrix-row-label {
  padding: 4px 12px 4px 0;
  white-space: nowrap;
  font-weight: normal;
  text-align: left;
}

.matrix-cell {
  padding: 4px 8px;
  white-space: nowrap;
}

.swatch-cell {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.swatch {
  display: inline-block;
  flex-shrink: 0;
  width: 14px;
  height: 14px;
  border: 1px solid ButtonBorder;
  border-radius: 2px;
}

.matrix-cell.unsupported {
  color: GrayText;
}

/* ---- Notes ---- */

#notes {
  margin-top: 80px;
  padding-top: 32px;
  /* layout, rhythm, and typography live in notes.css */
}

#notes:empty {
  display: none;
}

/* ---- Shared: color references & compare tables ---- */

[data-ref] {
  white-space: nowrap;
}

[data-ref] code {
  font-family: inherit;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  vertical-align: middle;
}

#notes [data-ref] code {
  background: none;
  padding: 0;
  border-radius: 0;
}

.color-na {
  color: GrayText;
}

.compare-table {
  border-collapse: collapse;
  margin: 10px 0 4px;
}

.compare-table th,
.compare-table td {
  padding: 3px 12px 3px 0;
  text-align: left;
  font-weight: normal;
  white-space: nowrap;
}

.compare-table thead th {
  color: GrayText;
  font-size: 1rem;
  padding-bottom: 4px;
  border-bottom: 1px solid ButtonBorder;
}

.compare-table tbody th {
  color: GrayText;
}

.compare-table code {
  font-family: inherit;
}

#notes .compare-table code {
  background: none;
  padding: 0;
  border-radius: 0;
}

/* Row hover */

.matrix-row:hover td,
.matrix-row:hover th {
  background: color-mix(in srgb, Highlight 5%, transparent);
}