html{scroll-behavior:smooth;font-size:16px;background-color:#1a1a1a;color:#fff}.exit-btn{position:absolute;top:40px;right:40px;background:transparent;border:none;color:#666;font-size:.9rem;cursor:pointer;transition:color .3s}.exit-btn:hover{color:#fff}@media(max-width:768px){.exit-btn{top:20px;right:20px}}