.dropzone {
    border: 2px dashed #007bff !important;
    border-radius: 10px;
    background: #f8f9fa;
    padding: 20px;
    min-height: 200px;
    transition: all 0.3s ease;
}

.dropzone:hover {
    border-color: #0056b3 !important;
    background: #e9ecef;
}

.dropzone .dz-message {
    text-align: center;
    margin: 2em 0;
    color: #6c757d;
}

.dropzone .dz-message i {
    color: #007bff;
    margin-bottom: 15px;
}

.dropzone .dz-preview {
    border-radius: 8px;
    margin: 10px;
}

.dropzone .dz-preview .dz-image {
    border-radius: 8px;
}

.progress-container {
    background: #f8f9fa;
    padding: 20px;
    border-radius: 8px;
    border: 1px solid #dee2e6;
}

.progress {
    height: 25px;
    border-radius: 12px;
}

.progress-bar {
    border-radius: 12px;
    transition: width 0.3s ease;
}

.results-list .alert {
    margin-bottom: 10px;
    padding: 10px 15px;
}

.card-primary {
    box-shadow: 0 0 20px rgba(0,0,0,0.1);
    border: none;
    border-radius: 15px;
}

.card-header {
    background: linear-gradient(135deg, #007bff 0%, #0056b3 100%);
    color: white;
    border-radius: 15px 15px 0 0 !important;
}

.btn-success, .btn-danger {
    border-radius: 25px;
    padding: 8px 20px;
    font-weight: 600;
}

#btnStartConversion:disabled {
    background-color: #6c757d;
    border-color: #6c757d;
}