.container {
            text-align: center;
        }
        h1 {
            font-weight: bold;
        }
        .button {
            display: inline-block;
            padding: 10px 20px;
            margin: 10px;
            color: white;
            border: none;
            cursor: pointer;
            font-weight: bold;
        }
        .green {
            background-color: green;
        }
        .red {
            background-color: red;
        }