*{
    padding: 0;
    margin: 0;
    box-sizing: border-box;
}
main{
    font-family: sans-serif;
}
#navbar{
    border-right: 2px rgba(0, 22, 22, 0.4) solid;
    max-width:21em;
    height: 100vh;
    position: fixed;
}
#navbar>header{
            text-align: center;
    }
.nav-link{
    display: block;
    text-decoration: none;
    color: #4d4e53;
    border-top: 0.01em solid;
    padding:  0.75em;
}
.main-section{
    margin-left: 21em;
}
header{
  font-size:35px;
  padding: 0.5em;
}
p,li,code{
    margin: 2em;
}
code{
    display: block;
    background-color: #f7f7f7;
    padding: 2em;
    width: 80%;
}
.inli{
    margin-left: 3em;
}
@media (max-width:815px){
    #navbar{
        position: relative;
        max-width: 100vw;
        height: 260px;
        overflow:scroll;
    }
    .main-section{
        margin: 0;
    }
}