.upload-dropzone {
    border: 2px dashed #ced4da;
    border-radius: 0.5rem;
    background-color: #f8f9fa;
    padding: 2rem;
    text-align: center;
    cursor: pointer;
    transition: border-color 0.2s ease-in-out, background-color 0.2s ease-in-out;
}

.upload-dropzone:hover {
    border-color: #0d6efd;
    background-color: #f0f6ff;
}

.upload-dropzone.dragover {
    border-color: #0d6efd;
    background-color: #e7f1ff;
}

.upload-dropzone .upload-icon {
    font-size: 2rem;
    color: #6c757d;
    margin-bottom: 0.5rem;
}

.upload-dropzone .upload-label {
    font-size: 1rem;
    color: #495057;
    margin-bottom: 0.25rem;
}

.upload-dropzone .upload-sublabel {
    font-size: 0.875rem;
    color: #6c757d;
    margin-bottom: 0;
}

.upload-dropzone .upload-hint {
    font-size: 0.8rem;
    color: #adb5bd;
    margin-top: 0.25rem;
}

.upload-dropzone.has-file {
    border-color: #198754;
    background-color: #f0fff4;
}

.upload-dropzone.has-file .upload-icon {
    color: #198754;
}

.upload-dropzone.has-file .upload-label {
    color: #198754;
}

.upload-dropzone.uploading {
    border-color: #0d6efd;
    background-color: #e7f1ff;
    pointer-events: none;
    opacity: 0.7;
}

.upload-dropzone.uploading .upload-icon {
    color: #0d6efd;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.upload-file-input {
    display: none;
}

.document-item {
    display: flex;
    align-items: center;
    padding: 0.5rem 0.75rem;
    border: 1px solid #e9ecef;
    border-radius: 0.375rem;
    margin-bottom: 0.375rem;
    background-color: #fff;
    transition: background-color 0.15s ease-in-out;
}

.document-item:hover {
    background-color: #f8f9fa;
}

.document-item .document-icon {
    font-size: 1.25rem;
    margin-right: 0.5rem;
    flex-shrink: 0;
}

.document-item .document-name {
    flex-grow: 1;
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.document-item .document-actions {
    flex-shrink: 0;
    margin-left: 0.5rem;
}

.document-item.marked-for-deletion {
    opacity: 0.5;
}

.document-item.marked-for-deletion .document-name {
    text-decoration: line-through;
    color: #6c757d;
}