style.css

*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
body{
    width:100%;
    height:100vh;
    /*you can change the font*/
    font-family: Arial, Helvetica, sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
}
button{
    background: rgb(247, 98, 98);
    color:green;
    font-weight: 700;
    border:none;
    position:fixed;
    top:20px;
    right:20px;
    padding:5px 5px;
    border-radius: 5px;
    transition:transform 1s ease-in-out;
}
button.active{
    transform: translateX(-150px);
}
nav{
    background: rgb(2, 175, 2);
    position: fixed;
    top:0;
    right:0;
    height:100vh;
    padding:2rem;
    transform: translateX(100%);
    transition:transform 1s ease-in-out;
}
nav ul{
    padding:0;
    margin: 0;
    list-style: none;
}
nav.active{
    transform: translateX(0);
}
nav ul li{
    padding: 1rem 0;
}
nav a{
    color:white;
    text-decoration: none;
    transition: 0.5s;
}
nav a:hover{
    color:red;
    transition: 0.5s;
}