.scroll-progress{position:fixed;top:0;left:0;right:0;height:3px;background:linear-gradient(90deg,var(--navy-light) 0,var(--sky) 50%,#00F2FE 100%);transform-origin:left;z-index:1001;pointer-events:none;box-shadow:0 0 10px rgba(0,242,254,.6),0 0 4px rgba(58,155,213,.4)}.back-to-top{position:fixed;bottom:2rem;right:2rem;z-index:999;width:48px;height:48px;border-radius:50%;background:var(--grad-sky);color:var(--white);border:1px solid rgba(255,255,255,.3);box-shadow:0 8px 25px rgba(58,155,213,.4);display:flex;align-items:center;justify-content:center;cursor:pointer;outline:none;backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);transition:all .3s cubic-bezier(.4,0,.2,1)}.back-to-top:hover{transform:translateY(-4px) scale(1.05);box-shadow:0 12px 35px rgba(58,155,213,.6);background:linear-gradient(135deg,var(--sky-light) 0,var(--sky) 100%)}.back-to-top:active{transform:translateY(-1px) scale(.98)}.back-to-top-icon{transition:transform .3s ease}.back-to-top:hover .back-to-top-icon{transform:translateY(-2px)}@media (max-width:768px){.back-to-top{bottom:1.5rem;right:1.25rem;width:44px;height:44px}}