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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    color: #333;
}

header {
    text-align: center;
    padding: 2rem;
    color: white;
}

header h1 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
}

main {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.card {
    background: white;
    border-radius: 15px;
    padding: 2rem;
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
    transition: transform 0.3s;
}

.card:hover {
    transform: translateY(-5px);
}

.card-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
    text-align: center;
}

.card h2 {
    margin-bottom: 1rem;
    color: #444;
}

.card p {
    color: #666;
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.upload-area {
    border: 2px dashed #ddd;
    border-radius: 10px;
    padding: 1rem;
    text-align: center;
    margin-bottom: 1rem;
    cursor: pointer;
}

.upload-btn {
    background: #f0f0f0;
    border: none;
    padding: 0.8rem 1.5rem;
    border-radius: 5px;
    color: #666;
    cursor: pointer;
    transition: background 0.3s;
}

.upload-btn:hover {
    background: #e0e0e0;
}

.file-name {
    display: block;
    margin-top: 0.5rem;
    font-size: 0.9rem;
    color: #888;
}

.analyze-btn {
    width: 100%;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    padding: 1rem;
    border-radius: 5px;
    font-size: 1rem;
    cursor: pointer;
    transition: opacity 0.3s;
}

.analyze-btn:hover {
    opacity: 0.9;
}

.analyze-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.feature-list {
    list-style: none;
    margin: 1rem 0;
}

.feature-list li {
    padding: 0.5rem 0;
    border-bottom: 1px solid #eee;
    color: #555;
}

.coming-soon {
    text-align: center;
    color: #999;
    font-style: italic;
    margin-top: 1rem;
}

.result-container {
    background: white;
    border-radius: 15px;
    padding: 2rem;
    margin-top: 2rem;
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
}

.result-content {
    background: #f8f9fa;
    border-radius: 10px;
    padding: 1.5rem;
    margin-top: 1rem;
    max-height: 400px;
    overflow-y: auto;
}

.loading {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid #f3f3f3;
    border-top: 4px solid #667eea;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-right: 1rem;
}

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

.error {
    color: #dc3545;
    padding: 1rem;
    background: #f8d7da;
    border-radius: 5px;
}

.success {
    color: #28a745;
    padding: 1rem;
    background: #d4edda;
    border-radius: 5px;
}

pre {
    white-space: pre-wrap;
    word-wrap: break-word;
    font-family: monospace;
}

@media (max-width: 768px) {
    header h1 {
        font-size: 2rem;
    }
    
    .grid {
        grid-template-columns: 1fr;
    }
}