body{
margin:0;
font-family:Arial;
}

nav{
position:fixed;
top:0;
width:100%;
background:transparent;
padding:15px;
transition:0.4s;
}

nav ul{
list-style:none;
display:flex;
justify-content:center;
}

nav ul li{
margin:0 20px;
}

nav ul li a{
text-decoration:none;
color:white;
font-size:18px;
transition:0.3s;
}

nav ul li a:hover{
color:yellow;
}

.scrolled{
background:black;
}

.section{
height:100vh;
display:flex;
flex-direction:column;
justify-content:center;
align-items:center;
background:linear-gradient(45deg,#4facfe,#00f2fe);
color:white;
}