
            width: 100%;
            max-width: 800px; /* Max width for larger screens */
            margin: 0 auto; /* Center on larger screens */
            padding: 15px; /* Mobile padding */
            display: flex;
            flex-direction: column;
        }

        /* --- Header --- */
        .header {
            text-align: center;
            margin-bottom: 25px;
            padding-top: 10px;
        }
        .header h1 {
            font-size: 1.9em; /* Slightly smaller for mobile */
  