body {
  background-color: #f4f5f7;
}
.card {
  box-shadow: 0 1px 3px rgba(0,0,0,0.08);
}
.stat-tile {
  background: #fff;
  border-radius: 10px;
  padding: 1rem 1.25rem;
  box-shadow: 0 1px 3px rgba(0,0,0,0.08);
}
.stat-tile .value {
  font-size: 2rem;
  font-weight: 700;
}
.stat-tile .label {
  color: #6c757d;
  font-size: 0.85rem;
}
canvas {
  max-height: 320px;
}