Template:2Cols/styles.css

/** CSS 2 cols **/
.iscolwrapper{display:block;width:100%;height:auto;margin:10px auto 12px auto;box-sizing:border-box;padding:.7em;}
.flex-container {display: flex;flex-flow: row wrap;}
.flex-container .isrow {display:block;flex-direction: row;}
.flex-container .iscolumn {display:block;flex-direction:column;}
@media screen and (min-width: 200px) and (max-width: 1100px){.isrow,.iscolumn {flex: 1;flex-direction: column;}
.double-iscolumn {flex: 2;flex-direction: column;}}