.return-to-top-btn{z-index:50;color:#fff;cursor:pointer;inset-inline-end:2.5rem;background:#063e27;border:none;border-radius:50%;outline:none;justify-content:center;align-items:center;width:3.5rem;height:3.5rem;padding:0;transition:all .4s cubic-bezier(.34,1.56,.64,1);display:flex;position:fixed;bottom:80px;right:20px;overflow:visible;box-shadow:0 10px 25px #063e274d,0 4px 10px #0000001a}.return-to-top-btn:before{content:"";opacity:0;z-index:-1;background:linear-gradient(135deg,#063e27,#0a5c3a);border-radius:50%;transition:opacity .3s;position:absolute;inset:-4px}.return-to-top-btn:hover{transform:translateY(-8px)scale(1.05);box-shadow:0 15px 35px #063e2766,0 6px 15px #00000026}.return-to-top-btn:hover:before{opacity:1}.return-to-top-btn:active{transform:translateY(-2px)scale(.95)}.icon-wrapper{z-index:2;transition:transform .3s;position:absolute}.return-to-top-btn:hover .icon-wrapper{animation:1.5s infinite bounceUp}@keyframes bounceUp{0%,to{transform:translateY(0)}50%{transform:translateY(-4px)}}.progress-ring{pointer-events:none;position:absolute;inset:0;transform:rotate(-90deg)}.progress-ring__circle{filter:drop-shadow(0 0 2px #ffffff80);transition:stroke-dashoffset .1s linear}.return-to-top-btn.visible{opacity:1;visibility:visible;transform:scale(1)}.return-to-top-btn.hidden{opacity:0;visibility:hidden;pointer-events:none;transform:scale(0)}.dark .return-to-top-btn{background:#084d31}@media (max-width:640px){.return-to-top-btn{bottom:2rem;width:3rem;height:3rem;inset-inline-end:2rem}.progress-ring{width:48px;height:48px}}