body {
    font-family: 'Inter', sans-serif;
    background-color: #111827; /* bg-gray-900 */
}
.image-container {
    background-color: #1f2937; /* bg-gray-800 */
    border: 2px dashed #4b5563; /* border-gray-600 */
}
.spinner {
    border-top-color: #3b82f6; /* blue-500 */
    animation: spin 1s linear infinite;
}
@keyframes spin {
    to { transform: rotate(360deg); }
}
/* Custom styles for number input */
input[type=number]::-webkit-inner-spin-button, 
input[type=number]::-webkit-outer-spin-button { 
  -webkit-appearance: none; 
  margin: 0; 
}
input[type=number] {
  -moz-appearance: textfield;
}