body {
            font-family: Arial, sans-serif;
            margin: 0;
            padding: 0;
            background-color: #f4f4f4;
        }

        header, footer {
            background-color: #00000059;
            color: #fff;
            text-align: center;
            padding: 1em 0;
        }

        .container {
            max-width: 600px;
            margin: 20px auto;
            background-color: #fff;
            padding: 20px;
            box-shadow: 0px 0px 10px rgba(0, 0, 0, 0.1);
        }

        form {
            display: flex;
            flex-direction: column;
        }

        form input[type="text"] {
            padding: 15px;
			margin-top:20px;
            margin-bottom: 20px;
            border: 1px solid #ddd;
			font-size: 20px;
			text-align: center;
        }

        form input[type="submit"] {
            padding: 10px 15px;
            border: none;
            background-color: #00000059;
            color: #fff;
            cursor: pointer;
        }

        form input[type="submit"]:hover {
            background-color: #555;
        }

        .cara-penggunaan {
            margin-top: 20px;
        }

        .error-message {
            color: #D32F2F;
            background-color: #FFEBEE;
            padding: 10px;
            border-radius: 5px;
            box-shadow: 0px 0px 10px rgba(255, 0, 0, 0.1);
            margin-bottom: 15px;
        }