html {
    font-size: 100%;
    overflow-y: scroll;
    -webkit-text-size-adjust: 100%;
    -ms-text-size-adjust: 100%;
}

:root {
    --bg: #fefefe;
    --fg: #444;
    --link: #0645ad;
    --link_v: #0b0080;
    --link_h: #06e;
    --bg_grey: #eee;
    --dark_grey: #999;
}

[data-theme="dark"] {
    --bg: #222;
    --fg: #fefefe;
    --link: #4d7dcb;
    --link_v: #99a5d3;
    --link_h: #4c7ecf;
    --bg_grey: #333;
    --dark_grey: #333;
}

.logo {
    max-height: 30px
}

body {
    color: var(--fg);
    font-family: 'Roboto', sans-serif;
    font-size: 12px;
    line-height: 1.5em;
    padding: 1em 1em;
    margin: auto;
    max-width: 54em;
    background: var(--bg);
    min-height: 98vh;
    display: flex;
    flex-direction: column;
    align-items: center;
}

a {
    color: var(--link);
    text-decoration: none;
}

a:visited {
    color: var(--link_v);
}

a:hover {
    color: var(--link_h);
    cursor: pointer;
}

a:active {
    color: var(--link_h);
}

a:focus {
    outline: thin dotted;
}

a:hover, a:active {
    outline: 0;
}

p {
    margin: 1em 0;
}

h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    color: var(--fg);
}

h4, h5, h6 {
    line-height: 1em;
    font-weight: bold;
    font-size: 0.9em;
}

h1 {
    line-height: 1em;
    font-size: 1.5em;
}

h2 {
    line-height: 2em;
    font-size: 1.2em;
}

h3 {
    line-height: 1.5em;
    font-size: 1em;
}

b, strong {
    font-weight: bold;
}

ul, ol {
    margin: 1em 0;
    padding: 0 0 0 2em;
}

li p:last-child {
    margin: 0;
}

img {
    border: 0;
    vertical-align: middle;
    max-width: 100%;
}

@media only screen and (max-width: 768px) {
    body {
        font-size: 14px;
    }
    .logo {
        max-width: 20px;
    }
    .sitename {
        display: none;
    }
}

@media only screen and (min-width: 768px) {
    body {
        font-size: 16px;
    }
    .logo {
        max-height: 40px;
    }
    article {
        margin: 50px 0;
    }
}

nav {
    display: flex;
    width: 100%;
}

nav ul {
    margin: 0;
    padding: 0;
    list-style-type: none;
    overflow: hidden;
}

nav ul li {
    list-style-type: none;
    margin-left: 10px;
    margin-right: 10px;
}

.fa {
    color: var(--fg) !important;
    display: block;
    line-height: 2em;
}

nav div ul li a {
    color: var(--fg) !important;
    line-height: 2em;
    padding: 0.5em 0em;
    text-decoration: none;
}

.nav-right {
    padding: 0.5em 0.5em;
    flex: 2;
}

.nav-left {
    flex: 1;
}

.nav-left ul li {
    float: left;
}

.nav-right ul li {
    float: right;
}

.logo {
    margin: 0.5em
}

article {
    margin-top: 2em;
    max-width: 54em;
    min-height: 80vh;
    width: 100%;
    text-align: justify;
}

article img {
    margin: 1em auto 1em;
    display: block;
}

table {
    border: 1px solid var(--dark_grey);
    border-collapse: collapse;
}

th, td {
    padding: 0.5em;
    border: 1px solid var(--dark_grey)
}

blockquote {
    background-color: var(--bg_grey);
}

.anchor-link {
    opacity: 0;
}

.anchor-link:hover {
    opacity: 1;
}

.anchor-link:focus {
    opacity: 1;
}

footer {
    text-align: center;
    font-size: 14px;
    min-height: 2em;
}