*{
    box-sizing: border-box;
}
html{
    scroll-behavior: smooth;
}
body{
    margin: 0;
    padding: 0;
    min-height: 100vh;
    background: #333;
}

header{
    position: fixed;
    width: 100%;
    top: 0;
    left: 0;
    background: #000;
    padding: 1rem 2rem;
    display: flex;
    align-items: center;
    justify-content: flex-end;
}

nav a{
    margin: 0.3rem;
    font-weight: 700;
    text-decoration: none;
    color: #fff;
    transition: 0.3s linear;
}
nav a.active{
    color: #09e;
}
nav a:hover{
    color: #09e;
}

section{
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 4rem;
    font-weight: 900;
    letter-spacing: 0.4rem;
}