.cocoen {
    box-sizing: border-box;
    cursor: pointer;
    line-height: 0;
    margin: 0;
    overflow: hidden;
    padding: 0;
    position: relative;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
}
.cocoen * {
    box-sizing: inherit;
}
.cocoen ::after,
.cocoen ::before {
    box-sizing: inherit;
}
.cocoen img,
.cocoen picture > img {
    max-width: none;
}
.cocoen > img,
.cocoen > picture > img {
    display: block;
    width: 100%;
}
.cocoen > div:first-child,
picture .cocoen > div {
    height: 100%;
    left: 0;
    overflow: hidden;
    position: absolute;
    top: 0;
    width: 50%;
}
.cocoen-drag {
    background: #fcd405;
    bottom: 0;
    cursor: ew-resize;
    left: 50%;
    margin-left: -1px;
    position: absolute;
    top: 0;
    width: 2px;
}
.cocoen-drag::before {
    background: rgba(252,212,5,0.7);
    content: "Trước";
    line-height: 24px;
    height: 24px;
    right: 1px;
    margin-left: 0px;
    margin-top: -12px;
    position: absolute;
    top: 50%;
    width: 70px;
     display: block;
  
      text-align: center;
      text-transform:uppercase;
    
}
.cocoen-drag::after {
    background: rgba(252,212,5,0.7);
    content: "Sau";
    line-height: 24px;
    height: 24px;
    left: 1px;
    margin-left: 0px;
    margin-top: -12px;
    position: absolute;
    top: 50%;
    width: 70px;
    display: block;
    
    text-align: center;
    text-transform:uppercase;

}