/* GLOBAL */
body { font-family: "Inter", sans-serif; background:#f5f7fa; scroll-behavior:smooth; }
h1,h2,h3,h4{font-weight:600;}

/* SMOOTH SECTION ANIMATIONS */
.fade-in { opacity:0; transform:translateY(25px); transition:all .8s ease; }
.fade-in.visible { opacity:1; transform:none; }

/* PRELOADER */
#preloader {
    position: fixed; top:0; left:0;
    width:100%; height:100%;
    background:#0c1b33;
    z-index:9999;
    display:flex; align-items:center; justify-content:center;
}
.loader {
    width:55px; 
    height:55px; 
    border:5px solid #1e2e4a;
    border-top-color:#fff; 
    border-radius:50%;
    animation: spin 1s linear infinite;
}
@keyframes spin { 100% { 
    transform:rotate(360deg); 
} 
}


/* ============ Mouse Follow Glow ============ */
.cursor-glow {
    position: fixed;
    top: 0;
    left: 0;
    width: 350px;
    height: 350px;
    pointer-events: none;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(0,112,255,0.45), rgba(0,112,255,0.15), transparent 70%);
    filter: blur(55px);
    transform: translate(-50%, -50%);
    z-index: -1;
    transition: background 0.4s ease;
    opacity: 1;
}

/* Dark-mode or dark sections: brighter effect */
.hero:hover .cursor-glow {
    background: radial-gradient(circle, rgba(0,150,255,0.55), rgba(0,90,200,0.25), transparent 70%);
}