:root {
  color-scheme: light dark;
  --bg: #0f0f12;
  --fg: #e8e8ea;
  --muted: #b4b4b8;
  --card: #1a1a1e;
  --accent: #3a86ff;
  --border: #2a2a31;
}
* {
  box-sizing: border-box;
}
html, body {
  height: 100%;
}
body {
  margin: 0;
  font-family: Inter, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, Apple Color Emoji, Segoe UI Emoji;
  background: var(--bg);
  color: var(--fg);
  display: grid;
  place-items: start center;
}
.container {
  width: 100%;
  padding: 32px 20px 40px;
}
h1 {
  margin: 0 0 16px;
  font-size: 24px;
}
.split {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 16px;
  align-items: start;
}
.uploader {
  margin: 12px 0 20px;
}
input[type="file"] {
  font: inherit;
  color: var(--fg);
}
.options {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px;
}
.card h2 {
  margin: 0 0 10px;
  font-size: 18px;
}
.mode {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 4px 0 12px;
}
.mode label {
  color: var(--muted);
  font-size: 13px;
}
.mode select {
  background: #232329;
  color: var(--fg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 6px 8px;
}
.preview-wrap {
  display: grid;
  place-items: center;
  background: #111114;
  border: 1px dashed var(--border);
  border-radius: 8px;
  padding: 8px;
  margin-bottom: 8px;
}
canvas {
  width: 100%;
  height: auto;
  image-rendering: optimizeQuality;
  border-radius: 4px;
}
.info {
  color: var(--muted);
  font-size: 13px;
  margin-bottom: 10px;
}
button {
  appearance: none;
  border: 1px solid var(--border);
  background: #232329;
  color: var(--fg);
  padding: 10px 14px;
  border-radius: 8px;
  font-weight: 600;
  cursor: pointer;
}
button:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}
@media (max-width: 720px) {
  .split {
    grid-template-columns: 1fr;
  }
}