:root {
  color-scheme: dark;
  --bg: #0f1220;
  --panel: #171b2d;
  --panel-2: #20263e;
  --line: #313a5c;
  --text: #eef2ff;
  --muted: #b6bfd8;
  --accent: #7aa2ff;
  --accent-2: #4ad1c5;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: radial-gradient(circle at top, #18203b 0%, var(--bg) 48%);
  color: var(--text);
}
.page {
  max-width: 1360px;
  margin: 0 auto;
  padding: 24px;
}
.hero { margin-bottom: 20px; }
.eyebrow {
  margin: 0 0 8px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent-2);
  font-size: 0.8rem;
}
h1 { margin: 0; font-size: clamp(2rem, 4vw, 3rem); }
.subhead { margin-top: 10px; color: var(--muted); max-width: 900px; line-height: 1.45; }
.layout {
  display: grid;
  grid-template-columns: 360px minmax(0, 1fr);
  gap: 20px;
}
.panel {
  background: rgba(23, 27, 45, 0.92);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 18px;
  box-shadow: 0 12px 35px rgba(0, 0, 0, 0.22);
}
.controls-panel h2 { margin-top: 0; }
.field-group { margin-bottom: 14px; }
label {
  display: block;
  margin-bottom: 6px;
  font-weight: 600;
}
input[type="file"], input[type="number"] {
  width: 100%;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: var(--panel-2);
  color: var(--text);
  padding: 10px 12px;
}
.hint { margin: 6px 0 0; font-size: 0.88rem; color: var(--muted); line-height: 1.4; }
.grid.two-up {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}
.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 12px;
}
.secondary-row { margin-top: 10px; }
button {
  border: none;
  border-radius: 12px;
  padding: 11px 14px;
  font-weight: 700;
  cursor: pointer;
  color: #09111f;
  background: linear-gradient(180deg, #98b7ff 0%, #7aa2ff 100%);
}
button:disabled {
  cursor: not-allowed;
  opacity: 0.45;
}
.status {
  margin-top: 16px;
  border-top: 1px solid var(--line);
  padding-top: 14px;
  display: grid;
  gap: 8px;
  font-variant-numeric: tabular-nums;
}
.canvas-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}
.canvas-card h3 {
  margin: 0 0 10px;
  color: var(--muted);
  font-size: 1rem;
}
canvas {
  width: 100%;
  aspect-ratio: 1 / 1;
  background: #0a0e19;
  border-radius: 16px;
  border: 1px solid var(--line);
  display: block;
  image-rendering: pixelated;
}
.output-card canvas {
  box-shadow: 0 0 0 1px rgba(122, 162, 255, 0.28), 0 0 24px rgba(122, 162, 255, 0.12);
}
.footer-hint { margin-top: 16px; }

@media (max-width: 980px) {
  .layout { grid-template-columns: 1fr; }
}
@media (max-width: 760px) {
  .canvas-grid { grid-template-columns: 1fr; }
}