.file-upload-component {
    margin-bottom: 1rem;
}

.upload-zone {
    border: 2px dashed #dee2e6;
    border-radius: 12px;
    padding: 2.5rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    position: relative;
    overflow: hidden;
}

.upload-zone::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(0,123,255,0.05) 0%, rgba(0,123,255,0.1) 100%);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.upload-zone:hover {
    border-color: #007bff;
    background: linear-gradient(135deg, #e3f2fd 0%, #bbdefb 100%);
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0,123,255,0.15);
}

.upload-zone:hover::before {
    opacity: 1;
}

.upload-zone.dragover {
    border-color: #007bff;
    background: linear-gradient(135deg, #e3f2fd 0%, #bbdefb 100%);
    transform: scale(1.02);
    box-shadow: 0 12px 35px rgba(0,123,255,0.2);
}

.preview-grid {
    max-height: 400px;
    overflow-y: auto;
    padding: 10px 0;
}

.preview-item {
    position: relative;
    border-radius: 12px;
    overflow: hidden;
    background: white;
    border: 1px solid #e9ecef;
    margin-bottom: 15px;
    transition: all 0.3s ease;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
}

.preview-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.15);
}

.preview-item img {
    width: 100%;
    height: 140px;
    object-fit: cover;
}

.pdf-preview {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 140px;
    background: linear-gradient(135deg, #fff5f5 0%, #fed7d7 100%);
    border-bottom: 1px solid #e9ecef;
}

.preview-item .remove-btn {
    position: absolute;
    top: 8px;
    right: 8px;
    background: rgba(220, 53, 69, 0.9);
    color: white;
    border: none;
    border-radius: 50%;
    width: 30px;
    height: 30px;
    font-size: 12px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    z-index: 10;
}

.preview-item .remove-btn:hover {
    background: rgba(220, 53, 69, 1);
    transform: scale(1.1);
}

.file-info {
    padding: 12px;
    background: white;
}

.file-name {
    font-weight: 600;
    font-size: 0.875rem;
    color: #2d3748;
    margin-bottom: 4px;
    word-break: break-word;
}

.file-size {
    font-size: 0.75rem;
    color: #718096;
    font-weight: 500;
}

.upload-progress {
    margin-top: 1rem;
}

.upload-errors {
    margin-top: 1rem;
}