.siu-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

.siu-upload-area {
    background: #f9f9f9;
    padding: 30px;
    border-radius: 10px;
    margin-bottom: 30px;
    border: 2px dashed #ddd;
}

.siu-upload-area h3 {
    margin-top: 0;
    color: #333;
}

.siu-drop-zone {
    border: 2px dashed #007cba;
    border-radius: 8px;
    padding: 40px 20px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    background: #fff;
}

.siu-drop-zone:hover,
.siu-drag-over {
    background: #f0f8ff;
    border-color: #005a87;
}

.siu-drop-text {
    color: #007cba;
    font-size: 16px;
    font-weight: 500;
}

.siu-preview {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
    margin: 20px 0;
}

.siu-preview-item {
    width: 120px;
    text-align: center;
}

.siu-preview-item img {
    width: 100%;
    height: 80px;
    object-fit: cover;
    border-radius: 5px;
}

.siu-preview-name {
    display: block;
    font-size: 12px;
    margin-top: 5px;
    color: #666;
    word-break: break-all;
}

.siu-upload-btn {
    background: #007cba;
    color: white;
    border: none;
    padding: 12px 30px;
    border-radius: 5px;
    cursor: pointer;
    font-size: 16px;
    transition: background 0.3s ease;
}

.siu-upload-btn:hover {
    background: #005a87;
}

.siu-upload-btn:disabled {
    background: #ccc;
    cursor: not-allowed;
}

.siu-gallery {
    background: white;
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.siu-images-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 20px;
    margin-top: 20px;
}

.siu-image-item {
    position: relative;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    transition: transform 0.3s ease;
}

.siu-image-item:hover {
    transform: translateY(-5px);
}

.siu-image-item img {
    width: 100%;
    height: 150px;
    object-fit: cover;
    display: block;
}

.siu-delete-btn {
    position: absolute;
    top: 10px;
    right: 10px;
    background: #dc3232;
    color: white;
    border: none;
    padding: 5px 10px;
    border-radius: 3px;
    cursor: pointer;
    font-size: 12px;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.siu-image-item:hover .siu-delete-btn {
    opacity: 1;
}

.siu-message {
    padding: 10px 15px;
    border-radius: 5px;
    margin: 10px 0;
    display: none;
}

.siu-success {
    background: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.siu-error {
    background: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

/* Responsive design */
@media (max-width: 768px) {
    .siu-container {
        padding: 10px;
    }
    
    .siu-upload-area,
    .siu-gallery {
        padding: 20px;
    }
    
    .siu-images-grid {
        grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    }
}