body { 
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; 
    background: #f8fafc; 
    margin: 0; 
    padding: 20px; 
    color: #1e293b; 
    line-height: 1.6;
}
.container { 
    max-width: 800px; 
    margin: auto; 
    background: white; 
    padding: 40px; 
    border-radius: 12px; 
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06); 
}
h1 { 
    color: #0f172a; 
    text-align: center; 
    font-size: 2rem; 
    margin-bottom: 1rem;
    font-weight: 600;
}
code { 
    background: #f1f5f9; 
    padding: 0.25rem 0.5rem; 
    border-radius: 6px; 
    font-family: 'Monaco', monospace;
    color: #64748b;
}