.nav-btn:after,.nav-btn:before{content:"";position:absolute;width:100%;height:100%;border-radius:1px}.nav-btn:before{transform:rotate(45deg);border-bottom:3px solid #000;transform-origin:center}.nav-btn:after{transform:rotate(-45deg);border-top:3px solid #000;transform-origin:center}.nav-btn__next{transform-origin:center center;transform:rotate(180deg) translateY(50%)}