.column-layout {
    max-width: 1300px;
    background-color:#FFF;
    margin: 40px auto 0 auto;
    line-height: 1.65;
    padding: 20px 50px;
    display: flex;
}

.main-column {
    flex: 3;
    order: 2;
    font-size: 20px;
}

.sidebar-one {
    flex: 1;
    order: 1;
}

.sidebar-two {
    flex: 1;
    order: 3;
}

.call-outs-container {
    max-width: 1400px;
    margin: 40px auto 0 auto;
    display: flex;
    align-items: stretch;
}

.call-out {
    padding: 20px;
    box-sizing: border-box;
    margin-bottom: 20px;
    flex-basis: 30%;
}

@media (min-width: 900px) {
    .call-outs-container {
        display: flex;
        justify-content: space-between;
    }
}

.call-out:nth-child(1) {background-color: red;}
.call-out:nth-child(2) {background-color: pink;}
.call-out:nth-child(3) {background-color: orange;}

.fixed-size-container {
    max-width: 1400px;
    margin: 40px auto 0 auto;
    background-color: #FFF;
    padding: 30px 0;
    display: flex;
    align-items: center;
    justify-content: space-around;
    flex-wrap: wrap;
}

.fixed-size {
    width:150px;
    height: 100px;
    background-color: #990b47;
    color: #FFF;
    line-height: 100px;
    text-align: center;
    font-weight: bold;
    font-size: 60px;
    margin-bottom: 20px;
}


.equal-height-container {
    max-width: 900px;
    margin: 0 auto;
    display: flex;
}

.first {
    background-color:#FFF;
    padding: 20px;
    flex: 1;
    display: flex;
}
    
.second {
    background-color: lightyellow;
    flex: 1;
    flex-direction: column;
    display: flex;
}
    
.second-a {
    background-color: pink;
    flex: 1;
}

.second-b {
    background-color: lightyellow;
    flex: 1;
}