.full_width_row{
    width: 100%;
    height: auto;
}
.full_width_row:after {
    display: table;
    content: "";
    line-height: 0;
    clear: both;
}

.extended_container{
    margin-left: auto;
    margin-right: auto; 
    width: 1180px;
    display: block;
}
.extended_container:after {
    display: table;
    content: "";
    line-height: 0;
    clear: both;
}

.extended_row{
    display: block;
    width: 1200px;
    margin-left: -20px;
}
.extended_row:after {
    display: table;
    content: "";
    line-height: 0;
    clear: both;
}
        
.span15 {
    width: 1180px;
}
.span14 {
    width: 1100px;
}
.span13 {
    width: 1020px;
}

/* some bugs and conflicts */
.extended_row .span2{
    margin: 0 0 0 20px;
}

.extended_row .span2{
    margin: 0 0 0 40px;
}

.anti_reduce_fix:after {
    display: table;
    content: "";
    line-height: 0;
    clear: both;
}

@media (min-width: 1240px){
    .extended_container{
        width: 1180px;
    }
    .extended_row{
        width: 1200px;
    }
      
    .span15 {
        width: 1180px;
    }
    .span14 {
        width: 1100px;
    }
    .span13 {
        width: 1020px;
    }

}

@media (min-width: 980px) and (max-width: 1239px){
            
    .extended_container{
        width: 940px;
    }

    .extended_row{
        width: 960px;
    }
            
    .span15, .span14, .span13, .span12 {
        width: 940px;
        margin-left: 20px;
    }
}


@media (min-width: 768px) and (max-width: 979px) {

    .extended_row{
    width: 744px;
    }

.extended_container{
    width: 724px;
    }


    .span15, .span14, .span13 {
    width: 724px;
    }
          
    input.span16, input.span15, input.span14, input.span13, textarea.span16, textarea.span16, textarea.span15, textarea.span14, textarea.span13{
    width: 710px;
    }

}

@media screen and (max-width: 767px){
    .extended_container{
    width: 100%;
    }
    .extended_row{
    width: 100%;
    margin-left: 0;
    -webkit-box-sizing: border-box;
    -moz-box-sizing: border-box;
    box-sizing: border-box;
    }

    .extended_container [class^="span"]{
    margin-left: 0;
    }
          

    .span15, .span14, .span13 {
    width: 100%;
    -webkit-box-sizing: border-box;
    -moz-box-sizing: border-box;
    box-sizing: border-box;
    margin-bottom: 1.5em;
    }

}