.scroll-progress{position:fixed;top:0;left:0;height:4px;background:linear-gradient(90deg,#60A5FA,#A78BFA);z-index:9999;transition:width .25s ease-out}.section{position:relative;overflow:hidden;padding:clamp(3rem,6vh,6rem) clamp(1rem,4vw,3rem);background:#0f172a;color:#fff}.section.alt{background:#111827}.reveal-hidden{opacity:0;transform:translateY(50px)}.reveal-in{opacity:1;transform:translateY(0);transition:all 0.9s cubic-bezier(.16,.8,.45,1)}html{scroll-behavior:smooth}#hero-mount{background:radial-gradient(ellipse at top,#1e3a8a 0%,#0f172a 70%);background-attachment:fixed;border-radius:0 0 2rem 2rem;box-shadow:inset 0 -10px 40px rgba(0,0,0,.3)}.scroll-top-btn{position:fixed;bottom:1.5rem;right:1.5rem;background:linear-gradient(135deg,#60A5FA,#A78BFA);color:#fff;font-size:1.2rem;font-weight:700;width:50px;height:50px;border-radius:50%;display:flex;align-items:center;justify-content:center;box-shadow:0 10px 25px rgba(0,0,0,.3);cursor:pointer;transition:transform .3s ease;z-index:1500}.scroll-top-btn:hover{transform:scale(1.15) rotate(8deg)}@media (max-width:768px){.section{padding:2rem 1rem}.scroll-top-btn{width:45px;height:45px;font-size:1rem}}.section::after{content:'';position:absolute;bottom:0;left:0;width:100%;height:80px;background:linear-gradient(to top,rgba(0,0,0,.5),transparent);pointer-events:none}