/*   <style> */
    body { font-family: Arial, sans-serif; margin: 20px; background: #f7f7f7; }
    .container { max-width: 960px; margin: auto; background: white; padding: 20px; border-radius: 8px; box-shadow: 0 2px 5px rgba(0,0,0,0.1); }
    h1 { text-align: center; }
    #chartContainer { margin-top: 30px; }
    label, select { font-size: 1rem; margin-right: 10px; }
    canvas { background-color: #fff; border: 1px solid #ccc; border-radius: 6px; }
/*   </style> */