:root {
  --bg: #fbfaf7;
  --fg: #1d1d1b;
  --muted: #5c5c57;
  --line: #d9d6cf;
  --accent: #1f5fbf;
  --error: #a3261c;
  --radius: 6px;
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #151514;
    --fg: #ecebe6;
    --muted: #a9a8a1;
    --line: #3a3936;
    --accent: #7fb0ff;
    --error: #ff8a80;
  }
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.55 system-ui, -apple-system, "Segoe UI", sans-serif;
}

main {
  max-width: 44rem;
  margin: 0 auto;
  padding: 2.5rem 1.25rem 4rem;
}

h1 { font-size: 1.9rem; margin: 0 0 0.5rem; }
h2 { font-size: 1.2rem; margin: 2.5rem 0 1rem; }
a { color: var(--accent); }
code { font-family: ui-monospace, "JetBrains Mono", monospace; font-size: 0.9em; }

.status { color: var(--muted); font-size: 0.9rem; }
.dataset-control { max-width: 16rem; margin-top: 1rem; }
.hint { color: var(--muted); font-size: 0.85rem; margin: 0.25rem 0 0; }
.error { color: var(--error); min-height: 1.5em; }

.controls {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(14rem, 1fr));
  gap: 1rem 1.5rem;
  margin-bottom: 1.25rem;
}

.control label { display: block; font-weight: 600; font-size: 0.95rem; }
.control output { font-weight: 400; color: var(--muted); margin-left: 0.35rem; }
.control input[type="range"] { width: 100%; }
.control input[type="number"], .control select {
  width: 100%;
  padding: 0.35rem 0.5rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: transparent;
  color: inherit;
  font: inherit;
}

.digits-frame {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #000;
  padding: 0.5rem;
  overflow-x: auto;
}

.digits, .live-image {
  display: block;
  image-rendering: pixelated;
}

.digits { width: 100%; height: auto; min-width: 20rem; }
.live-image { width: 10.5rem; height: 10.5rem; background: #000; border-radius: var(--radius); }
.live-output { display: flex; gap: 1rem; align-items: center; }

button {
  margin-top: 1rem;
  padding: 0.5rem 1rem;
  min-height: 2.25rem;
  border: 1px solid var(--accent);
  border-radius: var(--radius);
  background: var(--accent);
  color: var(--bg);
  font: inherit;
  font-weight: 600;
  cursor: pointer;
}

button:disabled { opacity: 0.6; cursor: progress; }

:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }

footer { margin-top: 3rem; border-top: 1px solid var(--line); padding-top: 1rem; color: var(--muted); font-size: 0.9rem; }

.findings { padding-left: 1.2rem; }
.findings li { margin-bottom: 0.75rem; }
figure { margin: 1.5rem 0; }
figure img { width: 100%; height: auto; border: 1px solid var(--line); border-radius: var(--radius); background: #fff; }
figcaption { color: var(--muted); font-size: 0.85rem; margin-top: 0.4rem; }