* {
	margin: 0;
	padding: 0;
	box-sizing: border-box;
	}

            header {
            background-color: #343a40;
            padding: 15px 0;
            text-align: right;
        }

        header button {
            margin-right: 15px;
        }

        footer {
            background-color: #343a40;
            color: #fff;
            text-align: center;
            padding: 15px 0;
            margin-top: 50px;
        }