#loader-overlay{position:fixed;top:0;left:0;width:100%;height:100%;background-color:var(--b);display:flex;justify-content:center;align-items:center;z-index:9999;transition:opacity 0.4s ease,visibility 0.4s ease;}
.wheel{width:50px;height:50px;border:5px solid rgba(255,255,255,0.1);border-radius:50%;border-top-color:var(--a);animation:spin 1s linear infinite;}
@keyframes spin{to{transform:rotate(360deg);}}
#loader-overlay.f-out{opacity:0;visibility:hidden;}