.tabs {
    table-layout: fixed;    
}

.tabs > tbody > tr > td {
    vertical-align: bottom;
    text-align: center;
}

.tab_sep {
    background-repeat: no-repeat;
    background-position: 0 bottom;  
}

.tab {
    position: relative;
}

.tab_back {
    width: 100%;
    position: absolute;
    top: 0;
    left: 0;
    z-index: 0;
}

.tab_left {
    float: left;
}

.tab_right {
    float: right;
}

.tab_middle {
}

.tab_main {
    position: absolute;
    text-align: left;
    width: 100%;
    top: 0;
    left: 0;
    z-index: 1;    
}

/* BORDER */