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

body {
  background-color: #909090;
  padding: 16px;
  padding-bottom: 100vh;
  font-family: system-ui, sans-serif;
  font-size: 14px;
  color: #111;
}

img, canvas {
  image-rendering: pixelated;
  display: block;
}

#source_img {
  max-width: 100%;
  margin-bottom: 12px;
}

table {
  border-collapse: collapse;
  margin-bottom: 12px;
}

td {
  padding: 3px 6px;
  vertical-align: middle;
}

td:first-child {
  text-align: right;
  white-space: nowrap;
}

fieldset {
  border: 1px solid #666;
  padding: 8px 12px;
  margin-bottom: 12px;
  background: rgba(0,0,0,0.08);
  display: inline-block;
}

legend {
  padding: 0 4px;
  font-weight: 600;
}

fieldset table {
  margin-bottom: 0;
}

input[type="number"] {
  width: 72px;
  padding: 2px 4px;
  border: 1px solid #888;
  background: #ddd;
}

input[type="color"] {
  width: 36px;
  height: 22px;
  padding: 1px;
  border: 1px solid #888;
  cursor: pointer;
  vertical-align: middle;
}

input[type="radio"] {
  vertical-align: middle;
  margin-right: 4px;
}

label {
  vertical-align: middle;
}

button {
  padding: 5px 14px;
  background: #555;
  color: #fff;
  border: 1px solid #333;
  cursor: pointer;
  font-size: 14px;
}

button:hover {
  background: #333;
}

progress {
  vertical-align: middle;
  margin-left: 8px;
  width: 200px;
  height: 16px;
}

#quantized_images > div {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 12px;
  align-items: flex-start;
}

#quantized_images canvas {
  border: 1px solid #555;
}