.sigOverlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.4);
  z-index: 100000;
  display: flex;
  align-items: center;
  justify-content: center;
}

.sigModal {
  background: #fff;
  border-radius: 8px;
  width: 520px;
  box-shadow: 0 12px 40px rgba(0,0,0,0.2);
}

.sigHeader {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 20px;
  border-bottom: 1px solid #eee;
}

.sigHeader h3 {
  margin: 0;
  font-size: 16px;
  font-weight: 600;
}

.sigBody {
  padding: 20px;
}

.sigModeTabs {
  display: flex;
  gap: 0;
  margin-bottom: 16px;
  border-bottom: 2px solid #e5e5e5;
}

.sigNameField {
  margin-bottom: 12px;
}

.sigNameField label {
  display: block;
  font-size: 12px;
  font-weight: 600;
  color: #666;
  margin-bottom: 4px;
}

.sigModeTab {
  padding: 6px 16px;
  border: none;
  background: none;
  font-size: 13px;
  font-weight: 600;
  color: #999;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
}

.sigModeTab.active {
  color: #007bff;
  border-bottom-color: #007bff;
}

.sigCanvasWrap {
  position: relative;
}

.sigCanvas {
  border: 1px solid #ddd;
  border-radius: 4px;
  cursor: crosshair;
  display: block;
  width: 100%;
  touch-action: none;
}

.sigClearBtn {
  position: absolute;
  top: 8px;
  right: 8px;
  padding: 2px 10px;
  font-size: 11px;
  border: 1px solid #ddd;
  background: #fff;
  border-radius: 3px;
  cursor: pointer;
  color: #666;
}

.sigTypeWrap {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.sigTypeInput {
  font-size: 16px;
}

.sigTypePreview {
  padding: 20px;
  text-align: center;
  font-family: "Brush Script MT", "Segoe Script", cursive;
  font-size: 36px;
  color: #333;
  border: 1px solid #eee;
  border-radius: 4px;
  background: #fafafa;
}

.sigFooter {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  padding: 14px 20px;
  border-top: 1px solid #eee;
}