*{
    box-sizing: border-box;
}
body{
    margin: 0;
    background-color: lightgray;
    line-height: 1.4;
}
.container{
    max-width: 960px;
    margin: 0 auto;
}
.row{
    display: flex;
}
.flex-item{
    flex-basis: 200px;
    height: 200px;
}
.one{
    background-color: blue;
    flex-shrink: 1;
}
.two{
    background-color: orange;
    flex-shrink: 2;
}
.three{
    background-color: red;
    flex-shrink: 3;
}
#footer{
    text-align: center;
    bottom: 0;
    position: fixed;
}
a{
    color: black;
    text-decoration: none;
}