#properties-panel-container {
  position: absolute;
  bottom: 10px;
  left: 10px;
  z-index: 10;

  width: 250px;
  background-color: #ffffff;
  border: 1px solid #e6e8eb;
  border-radius: 2px;
  padding: 12px;
  color: #666;
  font-family: sans-serif;
  font-size: 14px;
  box-shadow: 0 6px 20px rgba(0,0,0,0.08);
}

#properties-panel-container:empty {
  display: none;
}

#properties-panel-container h3 {
  margin: 0 0 10px;
  padding-bottom: 8px;
  font-size: 15px;
  font-weight: 500;
  color: #444;
  border-bottom: 1px solid #e6e8eb;
}

#properties-panel-container {
  margin: 0;
  color: #666;
  font-size: 14px;
}

#properties-panel-container .property-row {
  display: flex;
  align-items: center;
  margin-bottom: 4px;
}

#properties-panel-container label {
  color: #444;
  font-size: 14px;
  min-width: 165px;
}

#properties-panel-container input[type="number"] {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 14px;
  color: #1587f9;
  background-color: #ffffff;
  border: 1.5px solid #ddd;
  border-radius: 2px;
  padding: 2px 6px;
  width: 70px;
  transition: background-color 0.15s, box-shadow 0.15s, border-color 0.15s;
}

#properties-panel-container input[type="number"]:hover {
  background-color: #ffffff;
  box-shadow: 0 1px 3px rgba(0,0,0,0.06);
}

#properties-panel-container input[type="number"]:focus {
  border-color: #1587f9;
  outline: none;
}