* {
    box-sizing: border-box;
    margin: 0;
}

body, html {
    min-width: 250px;
    background-color: #1b1b1b;
    color: #f2f7f6;
    line-height: 1.4;
    font-family: Arial, sans-serif;
}

a {
    color: lightgrey;
}

a:visited {
    color: grey;
}

#navbar {
    position: fixed;
    min-width: 250px;
    top: 0;
    left: 0;
    right: 0;
    width: 300px;
    height: 100%;
    border-right: solid;
    border-color: gray;
}

nav header {
    padding: .3em;
    width: 100%;
    margin: 10px;
    text-align: center;
    font-size: 1.5rem;
}

#navbar ul {
    display: flex;
    flex-direction: column;
    height: 88%;
    overflow-y: scroll;
    overflow-x: hidden;
    padding: 0;

}

.nav-item {
    color: #f7f7f7;
    border-top: 1px solid;
    list-style: none;
    padding: .9rem 1.8rem;
    position: relative;
    width: 100%;
    top: 0;
    cursor: pointer;
}

#navbar a {
    display: block;
    color: #f7f7f7;
    text-decoration: none;
}

.nav-item:hover {
    background-color: #313131;
}



#main-doc {
    position: absolute;
    margin-left: 310px;
    padding: 30px;
    margin-bottom: 110px;
}

#main-doc header {
    font-size: 1.5rem;
    background-color: #313131;
    padding: .6rem;
    margin: .2rem 1rem;
    color: #fff;
    margin-bottom: 2rem;
}

section article {
    margin: 15px;
    color: #cfcfcf;
    font-size: 1.1em;
}

article p, blockquote {
    margin-bottom: 1.5rem;
    padding-left: .5em;
}

.systems {
    margin-bottom: 1.5rem;
}

blockquote {
    padding-left: 2.3rem;
    border-left: 3px solid gray;
    border-radius: 3px;
    margin-left: 1.3rem;
    font-style: italic;
}

h3 {
    font-size: 1.3rem;
    padding-left: .4rem;
    color: #fff;
    margin-bottom: 2rem;
}

h4 {
    font-size: 1.1rem;
    padding-left: .4rem;
    color: #fff;
    margin-bottom: 2rem;
}

code {
    display: block;
    text-align: left;
    white-space: pre-line;
    position: relative;
    word-break: normal;
    word-wrap: normal;
    line-height: 2;
    background-color: #343434;
    padding: 15px;
    margin: 10px;
    border-radius: 5px;
}
.inline {
    display: inline;
    position: static;
    padding: .1rem;
    margin: 0;
}

@media only screen and (max-width: 815px) {
    /* For mobile phones: */
    #navbar ul {
        border: 1px solid;
        height: 207px;
    }

    #navbar {
        position: absolute;
        top: 0;
        padding: 0;
        margin: 0;
        width: 100%;
        max-height: 275px;
        border: none;
        z-index: 1;
        border-bottom: 2px solid;
    }

    #main-doc {
        position: relative;
        margin-left: 0;
        margin-top: 270px;
    }
}

@media only screen and (max-width: 400px) {
    #main-doc {
        margin-left: -10px;
    }

    code {
        margin-left: -20px;
        width: 100%;
        padding: 15px;
        padding-left: 10px;
        padding-right: 45px;
        min-width: 233px;
    }
}