.grade-btn:before{content:"";position:absolute;inset:0;padding:1px;border-radius:24px;background:linear-gradient(45deg,rgba(3,51,109,.4),rgba(0,115,255,.4));-webkit-mask:linear-gradient(#fff 0 0) content-box,linear-gradient(#fff 0 0);-webkit-mask-composite:xor;mask-composite:exclude;pointer-events:none;transition:all .3s ease}.grade-btn-hover:before{background:rgba(255,255,255,.8);border:1px solid #fff}