:root {
  --bg:     #ffffff;
  --fg:     #101010;
  --muted:  #5a5a5a;
  --line:   #101010;
  --accent: #f4f4f4;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg:     #0c0c0c;
    --fg:     #e6e6e6;
    --muted:  #8a8a8a;
    --line:   #e6e6e6;
    --accent: #1a1a1a;
  }
}

html {
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.7 ui-monospace, "DejaVu Sans Mono", "Liberation Mono", monospace;
}

body {
  max-width: 72ch;
  margin: 0 auto;
  padding: 3rem 1.25rem 4rem;
}

h1 {
  font-size: 1.4rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin: 0;
}

h2 {
  font-size: 1rem;
  font-weight: bold;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin: 0 0 0.75rem;
}

p { margin: 0 0 1rem; }

a { color: var(--fg); }

header {
  border-bottom: 1px solid var(--line);
  padding-bottom: 1.5rem;
  margin-bottom: 2.5rem;
}

header p {
  color: var(--muted);
  margin: 0.5rem 0 0;
}

section { margin-bottom: 2.5rem; }

footer {
  border-top: 1px solid var(--line);
  padding-top: 1.5rem;
  color: var(--muted);
}

footer p { margin: 0; }

footer p + p { margin-top: 0.4rem; }

textarea {
  display: block;
  width: 100%;
  box-sizing: border-box;
  font: inherit;
  color: inherit;
  background: var(--bg);
  border: 1px solid var(--line);
  padding: 0.75rem;
  resize: vertical;
}

fieldset {
  border: 1px solid var(--line);
  padding: 0.5rem 0.9rem 0.9rem;
  margin: 0 0 1rem;
}

legend {
  padding: 0 0.4rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-size: 0.85rem;
}

fieldset label {
  display: inline-block;
  margin-right: 1.25rem;
  white-space: nowrap;
}

button {
  font: inherit;
  color: inherit;
  background: var(--accent);
  border: 1px solid var(--line);
  padding: 0.4rem 1.1rem;
  cursor: pointer;
}

input[type="file"] {
  font: inherit;
  color: inherit;
  max-width: 100%;
}

input[type="file"]::file-selector-button {
  font: inherit;
  color: inherit;
  background: var(--accent);
  border: 1px solid var(--line);
  padding: 0.4rem 1.1rem;
  margin-right: 0.75rem;
  cursor: pointer;
}

input[type="color"] {
  width: 3rem;
  height: 1.6rem;
  padding: 0;
  border: 1px solid var(--line);
  background: none;
  vertical-align: middle;
  cursor: pointer;
}

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

#drop-zone {
  border: 1px solid var(--line);
  padding: 1rem;
}

#drop-zone[data-drag] {
  border-style: dashed;
  background: var(--accent);
}

.controls {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-items: center;
  margin: 1rem 0 0;
}

.hint {
  color: var(--muted);
  font-size: 0.9rem;
}

#status {
  color: var(--muted);
  font-size: 0.9rem;
  margin: 0.75rem 0 0;
  overflow-wrap: anywhere;
}

#status:empty { display: none; }

canvas {
  display: block;
  max-width: 100%;
  height: auto;
  border: 1px solid var(--line);
  image-rendering: pixelated;
}

#meta {
  color: var(--muted);
  font-size: 0.9rem;
  margin: 0.75rem 0 0;
}

pre {
  border: 1px solid var(--line);
  padding: 1rem;
  overflow-x: auto;
  line-height: 1.4;
}

dt {
  font-weight: bold;
  margin-top: 0.75rem;
}

dd {
  margin: 0 0 0 2ch;
}