#purecss.io fixed 810px grid for #facebook apps

grid.css

.fb-row {
    letter-spacing: -0.31em;
    *letter-spacing: normal;
    *word-spacing: -0.43em;
    text-rendering: optimizespeed;
}

.opera-only :-o-prefocus,
.fb-row {
    word-spacing: -0.43em;
}

.fb-col {
    display: inline-block;
    zoom: 1; *display: inline;
    letter-spacing: normal;
    word-spacing: normal;
    vertical-align: top;
    text-rendering: auto;
}

.fb-col-1,.fb-col-1-2,.fb-col-1-3,.fb-col-2-3,.fb-col-1-4,.fb-col-3-4,.fb-col-1-5,.fb-col-2-5,.fb-col-3-5,.fb-col-4-5,.fb-col-1-6,.fb-col-5-6 {
    display: inline-block;
    zoom: 1; *display: inline; 
    letter-spacing: normal;
    word-spacing: normal;
    vertical-align: top;
    text-rendering: auto;
}

.fb-col-1 {
    display:block;
}
.fb-col-1-2 {
    width: 405px;
}

.fb-offset-1-2 {
    margin-left: 405px;
}

.fb-col-1-3 {
    width: 269.99973px;
}

.fb-offset-1-3 {
    margin-left: 269.99973px;
}

.fb-col-2-3 {
    width: 540.00027px;
}

.fb-offset-2-3 {
    margin-left: 540.00027px;
}

.fb-col-1-4 {
    width: 202.5px;
}

.fb-offset-1-4 {
    margin-left: 202.5px;
}

.fb-col-3-4 {
    width: 607.5px;
}

.fb-offset-3-4 {
    margin-left: 607.5px;
}

.fb-col-1-5 {
    width: 162px;
}

.fb-offset-1-5 {
    margin-left: 162px;
}

.fb-col-2-5 {
    width: 324px;
}

.fb-offset-2-5 {
    margin-left: 324px;
}

.fb-col-3-5 {
    width: 486px;
}

.fb-offset-3-5 {
    margin-left: 486px;
}

.fb-col-4-5 {
    width: 648px;
}

.fb-offset-4-5 {
    margin-left: 648px;
}

.fb-col-1-6 {
    width: 135.00027px;
}

.fb-offset-1-6 {
    margin-left: 135.00027px;
}

.fb-col-5-6 {
    width: 674.99973px;
}

.fb-offset-5-6 {
    margin-left: 674.99973px;
}