.shimmer-btn:before{content:"";background:linear-gradient(90deg,#fff0 0%,#fff9 50%,#fff0 100%);width:50%;height:100%;animation:3.5s linear infinite shine;position:absolute;top:0;left:-150%;transform:skew(-20deg)}.dark .shimmer-btn:before{background:linear-gradient(90deg,#3b82f600 0%,#93c5fd40 50%,#3b82f600 100%)}.shimmer-btn:hover{border-color:#3b82f680;transform:translateY(-1px);box-shadow:0 4px 12px #3b82f626}@keyframes shine{0%{left:-150%}30%{left:150%}to{left:150%}}