div 반반 나누기

.left-container {
	width: 50%;
    float: left;
    box-sizing: border-box;
    border:solid;
	border-color: skyblue;
}

.right-container {
	width: 50%;
    float: right;
    box-sizing: border-box;
    border:solid;
	border-color: 777777;
}