* {
    margin: 0;
    padding: 0
}

.main {
    float: left;
    width: 100%;
}

.main .main-content {
    margin: 0 210px;
    background-color: rgba(33, 114, 214, 0.8);
    height: 400px
}

.left {
    width: 200px;
    float: left;
    background-color: rgba(255, 82, 0, 0.8);
    /* margin-left: -100%; */
    height: 200px;
    /* transition: margin 4s linear; */
}

.right {
    width: 200px;
    height: 200px;
    /* margin-left: -200px; */
    float: left;
    background-color: rgba(90, 243, 151, 0.8);
    /* transition: margin 2s linear; */
}