:root {
  --page-bg: #f8f9fa;
}

body {
  background: var(--page-bg);
}

.tool-card {
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.tool-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 0.75rem 1.5rem rgba(0, 0, 0, 0.12);
}

.preview-thumb {
  max-width: 100%;
  max-height: 140px;
  object-fit: contain;
  border: 1px solid #dee2e6;
  border-radius: 0.375rem;
  background: #fff;
  padding: 0.25rem;
}

.table-wrap {
  overflow-x: auto;
}

.result-canvas {
  display: block;
  width: auto;
  height: auto;
  border: 1px solid #dee2e6;
  border-radius: 0.375rem;
  background: #fff;
  image-rendering: pixelated;
  image-rendering: crisp-edges;
  cursor: zoom-in;
}

.heatmap-box {
  width: auto;
  height: auto;
  border: 1px solid #dee2e6;
  border-radius: 0.375rem;
  background: #fff;
  cursor: zoom-in;
}

.pixel-preview-wrap {
  width: 100%;
  max-width: 100%;
  overflow: auto;
}

.heatmap-box .hm image,
.heatmap-box .imagelayer image {
  image-rendering: pixelated;
  image-rendering: crisp-edges;
}

.concept-note {
  border-left: 4px solid #0d6efd;
  background: #f8fbff;
  padding: 0.75rem 0.9rem;
  margin: 0;
}