.canvas { 
  display: block; 
  top: 0;
  position: fixed;
  z-index: -100;
}
canvas { 
  width: 100vw; 
  height: 100vh;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Lato', 'Helvetica Neue', Helvetica, Arial, sans-serif;
    overflow-x: hidden;
    font-size: 14pt;
    margin: 0;
}
pre {
    padding: 4px;
    font-size: 10pt;
    overflow-y: auto;
}
footer {
    width: 100%;
    margin-top: 50px;
    padding-bottom: 20px;
    vertical-align: middle;
    z-index:200;
}
footer hr {
    margin-top: 1px;
    margin-bottom: 25px;
}
h1 {
    font-size: 2em;
}
h2 {
    margin-top: 0px;
    font-size: 1.5em;
}
section {
    margin-bottom: 50px;
}
section p {
    margin-bottom: 50px;
}
section img {
    max-width:100%;
    max-height:100%;
    width: auto;
    height: auto;
    display: block;
    margin: 0 auto;
}
code {
    padding: 2px 4px;
    font-size: 90%;
    color: #c7254e;
    border-radius: 4px;
}
iframe {
    align-content: middle;
}
.navbar {
    position: fixed;
    top: 0px;
    width: 100%;
    height: auto;
    padding-top: 5px;
    z-index:200;
    text-transform: uppercase;
}
.navbar hr {
    margin-bottom: 1px;
}
.popup-menu-btn-wrapper {
    display: none;
}
.body {
    padding-top: 20px;
    margin: 0 auto;
    max-width: 800px;
    z-index:100;
    text-align: justify;
    z-index:100;
    box-shadow: 0 4px 8px 0 rgba(0, 0, 0, 0.2), 0 6px 20px 0 rgba(0, 0, 0, 0.19);
}
.content {
    padding: 10%;
}
.icon-btn {
    margin-right: 10px;
    margin-left: 10px;
}
.icon-btn:hover {
    color: #888;
}
.row-2 {
    display: grid;
    grid-template-columns: 40% auto;
    grid-gap: 10px;
    grid-auto-rows: minmax(50px, auto);
}
.row-3-equal {
    display: grid;
    grid-template-columns: auto auto auto;
    grid-gap: 10px;
    grid-auto-rows: minmax(50px, auto);
}
.row-3 {
    display: grid;
    grid-template-columns: auto 20% auto;
    grid-gap: 10px;
    grid-auto-rows: minmax(50px, auto);
    vertical-align: middle;
}
.cell-3-1 {
    grid-column: 1;
    grid-row: 1;
    text-align: right;
}
.cell-3-3 {
    grid-column: 3;
    grid-row: 1;
}
.row-3-nav {
    display: grid;
    grid-template-columns: 10% auto 10%;
    grid-gap: 10px;
    grid-auto-rows: minmax(20px, auto);
    padding-left: 20px;
    padding-right: 20px;
    vertical-align: middle;
}
.row-3-nav .cell {
    margin-top: 5px;
}
.theme-switcher {
    padding-top: 5px;
}

.anchor {
  position: relative;
}
.anchor a {
  position: absolute;
  left: 0px;
  top: -50px;
}
.ref-list {
    padding: 0px;
}
.ref-list li {
    border-style: solid;
    border-width: 1px;
    border-radius: 4px;
    border-color: #888;
    margin: 0px;

    box-sizing: border-box;
    display: block;


    overflow-y: hidden;

    font-size: 16px;
    height: 42px;
    margin-bottom: -1px;
    padding-bottom: 10px;
    padding-left: 15px;
    padding-right: 15px;
    padding-top: 10px;
}
nav ul {
    padding-top: 5px;
    margin: 0;
}
nav li {
    padding-right: 20px;
    display: inline-block;
}


@media only screen and (max-width: 600px) {
    body {
        font-size: 12pt;
    }   

    .popup-menu {
        display: none;
    }  
    .popup-menu-show {
        display: block;
        padding-top: 5px;
        margin: 0;
    }
    nav li {
        margin: 0px;

        box-sizing: border-box;
        display: block;


        overflow-y: hidden;

        font-size: 16px;
        height: 42px;
        margin-bottom: -1px;
        padding-bottom: 10px;
        padding-left: 15px;
        padding-right: 15px;
        padding-top: 10px;
    }
    .row-3-equal {
        display: grid;
        grid-template-columns: auto auto;
        grid-gap: 10px;
        grid-auto-rows: minmax(50px, auto);
    }
    .row-2 {
        display: grid;
        grid-template-columns: auto;
        grid-gap: 10px;
        grid-auto-rows: minmax(50px, auto);
    }
    .row-2  img {
        display:block;
        margin:auto;
    }

    .popup-menu-btn-wrapper {
        padding-top: 5px;
        padding-left: 20px;
        display: block;
    }
}