body {
  background: #f5f5f5;
}

.sig-wrapper {
  border: 2px solid #dee2e6;
  border-radius: 8px;
  background: #fff;
  position: relative;
  width: 100%;
  height: 180px;
  touch-action: none;
}

.sig-wrapper canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border-radius: 6px;
}

.list-group-item.signed {
  background: #e8f5e9;
  color: #666;
  pointer-events: none;
}

.list-group-item.signed::after {
  content: '✓';
  float: right;
  color: #4caf50;
  font-weight: bold;
}

.sig-preview {
  max-width: 150px;
  max-height: 50px;
}

@media (max-width: 576px) {
  .container { padding-left: 12px; padding-right: 12px; }
  h5 { font-size: 1.1rem; }
}