:root {
  color-scheme: dark;
  --bg: #100e17;
  --panel: #1c1826;
  --text: #ece9f4;
  --muted: #948da3;
  --accent: #c77dff;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 1.5rem 1rem 2.5rem;
}

header {
  text-align: center;
  max-width: 640px;
}

h1 {
  margin: 0 0 0.25rem;
  font-size: 1.8rem;
}

.subtitle {
  margin: 0;
  color: var(--muted);
}

main {
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
  justify-content: center;
  margin-top: 1.5rem;
  width: 100%;
  max-width: 1100px;
}

.controls {
  background: var(--panel);
  border-radius: 12px;
  padding: 1rem 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  flex: 0 0 280px;
}

.control-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}

button,
.file-label {
  background: var(--accent);
  color: #1a0033;
  border: none;
  border-radius: 6px;
  padding: 0.4rem 0.8rem;
  font-size: 0.9rem;
  cursor: pointer;
}

button:hover,
.file-label:hover {
  filter: brightness(1.1);
}

select,
input[type="range"] {
  accent-color: var(--accent);
}

input[type="file"] {
  color: var(--muted);
  font-size: 0.85rem;
  max-width: 100%;
}

.hint {
  color: var(--muted);
  font-size: 0.85rem;
  margin: 0;
}

.status {
  margin: 0;
  min-height: 1.2em;
  font-size: 0.9rem;
}

.confusion-score {
  font-size: 0.85rem;
}

.confusion-score p {
  margin: 0 0 0.25rem;
  color: var(--muted);
}

.confusion-score ul {
  margin: 0;
  padding-left: 1.1rem;
}

.confusion-score .swatch {
  display: inline-block;
  width: 0.75em;
  height: 0.75em;
  border-radius: 50%;
  margin-right: 0.15rem;
  border: 1px solid var(--muted);
  vertical-align: -0.05em;
}

.pixel-inspector {
  font-size: 0.85rem;
}

.pixel-inspector p {
  margin: 0 0 0.25rem;
  color: var(--muted);
}

.pixel-inspector dl {
  margin: 0;
  display: grid;
  grid-template-columns: auto 1fr;
  column-gap: 0.5rem;
  row-gap: 0.15rem;
}

.pixel-inspector dt {
  color: var(--muted);
}

.pixel-inspector dd {
  margin: 0;
}

.pixel-inspector .swatch {
  display: inline-block;
  width: 0.75em;
  height: 0.75em;
  border-radius: 50%;
  margin-right: 0.3rem;
  border: 1px solid var(--muted);
  vertical-align: -0.05em;
}

#palette-count {
  width: 3.5em;
}

.palette-swatches {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.palette-swatches figure {
  margin: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.2rem;
}

.palette-swatches .swatch {
  width: 1.75rem;
  height: 1.75rem;
  border-radius: 6px;
  border: 1px solid var(--muted);
}

.palette-swatches figcaption {
  font-size: 0.7rem;
  color: var(--muted);
}

#palette-check-input {
  width: 100%;
  box-sizing: border-box;
  font-family: inherit;
  font-size: 0.85rem;
  resize: vertical;
}

.palette-check {
  font-size: 0.85rem;
}

.palette-check p {
  margin: 0 0 0.25rem;
  color: var(--muted);
}

.palette-check ul {
  margin: 0;
  padding-left: 1.1rem;
  list-style: none;
}

.palette-check li {
  margin-bottom: 0.15rem;
}

.palette-repair:not(:empty) {
  margin-top: 0.5rem;
  padding-top: 0.5rem;
  border-top: 1px solid var(--muted);
}

.palette-repair button {
  margin-top: 0.25rem;
}

.palette-check .swatch {
  display: inline-block;
  width: 0.75em;
  height: 0.75em;
  border-radius: 50%;
  margin-right: 0.15rem;
  border: 1px solid var(--muted);
  vertical-align: -0.05em;
}

input[type="color"] {
  width: 2.4em;
  height: 1.8em;
  padding: 0;
  border: 1px solid var(--muted);
  border-radius: 6px;
  background: none;
  cursor: pointer;
}

.contrast-check {
  font-size: 0.85rem;
}

.contrast-check p {
  margin: 0 0 0.25rem;
  color: var(--muted);
}

.contrast-check .contrast-ratio {
  color: var(--text);
  font-weight: 600;
}

.contrast-check dl {
  margin: 0;
  display: grid;
  grid-template-columns: auto 1fr;
  column-gap: 0.5rem;
  row-gap: 0.15rem;
}

.contrast-check dt {
  color: var(--muted);
}

.contrast-check dd {
  margin: 0;
}

.contrast-check .pass {
  color: #7ee787;
}

.contrast-check .fail {
  color: #ff7b72;
}

.contrast-check .preview {
  margin-top: 0.5rem;
  padding: 0.5rem 0.75rem;
  border-radius: 6px;
  border: 1px solid var(--muted);
}

.canvases {
  flex: 1 1 480px;
  min-width: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: center;
}

.canvases figure {
  margin: 0;
  flex: 1 1 220px;
  min-width: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.4rem;
}

.canvases figcaption {
  color: var(--muted);
  font-size: 0.85rem;
}

canvas {
  max-width: 100%;
  height: auto;
  background: #05060a;
  border: 1px solid #2b2740;
  border-radius: 8px;
}

#original,
#simulated {
  cursor: crosshair;
}

#original:focus-visible,
#simulated:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* line-height: 0 removes the small gap a canvas's inline baseline otherwise leaves below it,
   so the wrap sizes exactly to the (possibly CSS-scaled) canvas for the cursor's percentage
   positioning to line up against. */
.canvas-wrap {
  position: relative;
  display: inline-block;
  line-height: 0;
  max-width: 100%;
}

/* Positioned in percentages of the wrap, which is sized exactly to the canvas, so the dot
   lines up with the right image pixel whether or not `max-width: 100%` has scaled the canvas
   down from its native resolution. */
.pixel-cursor {
  position: absolute;
  width: 12px;
  height: 12px;
  margin-left: -6px;
  margin-top: -6px;
  border: 2px solid #fff;
  border-radius: 50%;
  box-shadow: 0 0 0 1px #000, 0 0 4px rgba(0, 0, 0, 0.6);
  pointer-events: none;
}

.compare-all-grid,
.severity-sweep-grid {
  width: 100%;
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: center;
}

.compare-all-grid figure,
.severity-sweep-grid figure {
  margin: 0;
  flex: 1 1 180px;
  min-width: 0;
  max-width: 220px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.4rem;
}

.compare-all-grid figcaption,
.severity-sweep-grid figcaption {
  color: var(--muted);
  font-size: 0.85rem;
}

footer {
  margin-top: 2rem;
  color: var(--muted);
  font-size: 0.85rem;
  text-align: center;
  max-width: 640px;
}