:root {
    --primary-color: #1d1f21;
    --nav-color: #c5c8c6;
    --nav-background: #292c2eb7;
    --code-color: #1d1f218a;
}

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

html, body {
    background-color: var(--primary-color);
    color: whitesmoke;
    font-family: 'Gill Sans MT', Calibri, 'Gill Sans', 'Trebuchet MS', sans-serif;
    scroll-behavior: smooth;
    line-height: 1.5em;
    height: 100%;
}

a {
    background-color: var(--nav-background);
    color: whitesmoke;
    text-decoration: none;
}

.nav-bar > ul > li > a:hover {
    color: #1e64b6;
}

table {
    border-collapse: collapse;
    margin-top: 1em;
    margin-bottom: 1em;
}

td, th {
    border: 1px solid #c5c8c6;
    text-align: left;
    padding: 8px;
}

#header > h1 {
    font-size: 35px;
    max-width: 100%;
    padding-bottom: 1em;
}

#header > p {
    font-size: 20px;
    line-height: 1.5;
}

h2 {
    font-size: 21px;
    padding: 1em 0 .25em 0;
    max-width: 100%;
}

p {
    font-size: 18px;
    padding-top: .5em;
    padding-bottom: .25em;
    max-width: 100%;
}

section > ul, ol {
    margin-left: 25px;
}

.nav-bar {
    background-color: var(--nav-background);
    overflow: hidden;
    color: whitesmoke;
    position: fixed;
    top: 0;
    left: 0;
    width: 175px;
    height: 100%;
    min-width: 100px;
    padding: 1em;
    z-index: 1;
}

nav > ul {
    display: flex;
    flex-direction: column;
    font-weight: bold;
    grid-gap: 3em;
    padding: 3m;
    list-style-type: none;
}

pre, code {
    background-color: var(--code-color);
    font-size: 14px;
    position: relative;
    word-break: normal;
    word-wrap: normal;
}

blockquote {
    padding: 1em;
}

#main-doc {
    margin-left: 310px;
    padding: 20px;
    margin-bottom: 110px;
    overflow-y: auto;
    width: 60%;
    display: flex;
    flex-direction: column;
    grid-gap: 1.5em;
}

#header {
    grid-area: header;
    text-align: left;
    display: flex;
    flex-direction: column;
    justify-items: center;
    height: 100vh;
    justify-content: center;
    align-content: center;
    padding: 5em 0 5em 0;
}

#img-text {
    color: whitesmoke;
    text-align: left;
    font-size: 30px;
    font-weight: bold;
    max-width: 100%;
}

#logo {
    font-size: 35px;
    width: 50%;
    height: 50%;
    transition: 0.75s;
    padding: 1em;
    margin: 0 auto;
}

#rplot {
    padding: 1em 0 1em 0;
    max-width: 100%;
}

@media screen and (max-width: 1253px) {
    #img-text {
        font-size: 25px;
        margin-right: 350px;
        padding: 1em;
        width: 100%;
        text-align: left;
    }

    #main-doc {
        position: relative;
        margin-left: 0px;
        margin: 0 auto;
        padding: 1em;
      }

    .nav-bar {
        background-color: var(--nav-background);
        overflow: hidden;
        color: whitesmoke;
        position: fixed;
        width: 100%;
        height: 5%;
        z-index: 1;
        font-size: 15px;
    }

    nav > ul {
        display: flex;
        flex-direction: row;
        font-weight: bold;
        list-style-type: none;
        justify-content: center;
    }
}

@media screen and (max-width: 900px) {

    #header {
        padding: 10em 0 10em 0;
    }

    #logo {
        width: 50%;
        height: 50%;
        padding: 1em;
        margin: 0 auto;
        display: none;
        visibility: invisible;
    }

    #header > h1 {
        font-size: 25px;
        margin-right: 0;
        padding: .25em 0 .25em 0;  
    }

    #main-doc {
        position: relative;
        top: 0;
        margin-left: 0px;
        width: 100%;
        padding: 2em;
    }

    .nav-bar {
        background-color: var(--nav-background);
        overflow: hidden;
        color: whitesmoke;
        position: relative;
        width: 100%;
        height: 30%;
        z-index: 1;
    }

    nav > ul {
        display: flex;
        flex-direction: column;
        grid-gap: 1em;
        font-weight: bold;
        list-style-type: none;
        justify-content: center;
    }
}