.dropzone {
    border: 2px dashed #3b82f6;
    transition: all 0.3s ease;
}

.dropzone:hover {
    border-color: #2563eb;
    background-color: rgba(59, 130, 246, 0.05);
}

.dropzone.active {
    border-color: #10b981;
    background-color: rgba(16, 185, 129, 0.1);
}