* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.container {
    background: white;
    border-radius: 20px;
    padding: 40px;
    max-width: 900px;
    width: 100%;
    box-shadow: 0 20px 60px rgba(0,0,0,0.3);
}

h1 {
    text-align: center;
    color: #333;
    margin-bottom: 10px;
}

.subtitle {
    text-align: center;
    color: #666;
    margin-bottom: 30px;
}

.upload-area {
    border: 3px dashed #667eea;
    border-radius: 15px;
    padding: 60px 20px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s;
}

.upload-area:hover {
    border-color: #764ba2;
    background: #f8f9ff;
}

.upload-area.dragover {
    background: #f0f4ff;
    border-color: #764ba2;
}

.upload-content svg {
    color: #667eea;
    margin-bottom: 20px;
}

.upload-content p {
    font-size: 18px;
    color: #333;
    margin-bottom: 10px;
}

.upload-content span {
    color: #999;
    font-size: 14px;
}

.result-area {
    margin-top: 30px;
}

.image-compare {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-bottom: 30px;
}

.image-box {
    text-align: center;
}

.image-box h3 {
    margin-bottom: 15px;
    color: #333;
}

.image-box img {
    max-width: 100%;
    border-radius: 10px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
}

.actions {
    display: flex;
    gap: 15px;
    justify-content: center;
}

button {
    padding: 12px 30px;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    cursor: pointer;
    transition: all 0.3s;
}

.btn-primary {
    background: #667eea;
    color: white;
}

.btn-primary:hover {
    background: #5568d3;
}

.btn-secondary {
    background: #e0e0e0;
    color: #333;
}

.btn-secondary:hover {
    background: #d0d0d0;
}

.loading {
    text-align: center;
    padding: 40px;
}

.spinner {
    border: 4px solid #f3f3f3;
    border-top: 4px solid #667eea;
    border-radius: 50%;
    width: 50px;
    height: 50px;
    animation: spin 1s linear infinite;
    margin: 0 auto 20px;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

@media (max-width: 768px) {
    .image-compare {
        grid-template-columns: 1fr;
    }
    
    .actions {
        flex-direction: column;
    }
    
    button {
        width: 100%;
    }
}