:root {
    --link-color: rgb(34,102,170);
    --icon-color: rgb(130, 150, 170);
    --table-heading-background: rgb(190, 200, 210);
    --info-color: rgb(215, 230, 250);
    --warning-color: rgb(255,220,70);
    --code-background: rgba(170, 170, 170, 0.2);
    --pre-background: rgba(170, 170, 170, 0.1);
    --keyword-color: rgb(130, 180, 230);

    --heading-font: "PT Sans Narrow", sans-serif;
    --content-font: "PT Serif", serif;
    --code-font: "JetBrains Mono", monospace;
    --keyword-font: "PT Sans Narrow", sans-serif;

    --shadow-color: rgba(100, 100, 100, 0.75);
    --text-shadow-color: rgba(100, 100, 100, 0.5);
}

html {
    font-family: var(--content-font);
    font-size: large;
}

body {
    box-sizing: border-box;
    text-align: left;
    word-wrap: break-word;
    hyphens: auto;
    margin: 1rem 0;
    margin-bottom: 1rem;
    margin: 1rem 1rem;
}

body > header form {
    display: inline;
}

body > header img {
    max-height: 30vh;
}

@media (min-width: 58.5rem) {
    body {
        margin: 1rem calc(50vw - 25rem);
        text-align: justify;
    }
}

@media (min-width: 84rem) {
    body > header img {
        position: absolute;
        top: 1rem;
        left: 1rem;
        max-width: calc(50vw - 27rem);
        max-height: 100vh;
    }
}

header {
    text-align: center;
    margin-bottom: 2rem;
}

footer {
    text-align: center;
    margin-top: 2rem;
    margin-bottom: 2rem;
    clear: both;
}

body > header nav a,
article footer nav a {
    margin-left: 0.5rem;
    margin-right: 0.5rem;
}

nav.social a {
    color: var(--icon-color);
}

nav.social a:hover {
    color: var(--link-color);
}

img.buymeacoffee {
    height: 1em;
}

hr {
    width: 30%;
    height: 1px;
    border: none;
    background: #aaa;
}

h1, h2, h3, h4 {
    font-family: var(--heading-font);
    font-weight: normal;
}

header h1 {
    font-size: 140%;
}

article {
    margin-bottom: 1rem;
}

article header {
    margin-bottom: 2rem;
}

article header h1 {
    position: relative;
    font-size: 180%;
}

article header nav {
    margin-top: 1rem;
}

article section h1,
article section h2 {
    position: sticky;
    top: 0px;
    background-color: white;
    z-index: 1;
}

article section h1,
article section h2,
article section h3 {
    margin-top: 1.5em;
    word-wrap: normal;
    hyphens: none;
    text-align: left;
    width: calc(100% + 1rem);
}

@media (min-width: 61rem) {
    article section h1,
    article section h2,
    article section h3 {
        margin-left: -1rem;
        width: 52rem;
    }
}

article section h1 {
    font-size: 160%;
}

article section h2 {
    font-size: 120%;
}

article section h2::before {
    content: "\203a\2002";
    color: #aaa;
}

article section h3 {
    font-size: 100%;
    font-weight: normal;
}

article section h3::before {
    content: "\00bb\2002";
    color: #aaa;
}

article section img {
    display: block;
}

article p,
article li {
    line-height: 1.4;
}

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

a:hover {
    text-decoration: underline;
}

ul {
    list-style: none;
    padding-left: 1.5em;
}

ul li {
    text-indent: -1.5em;
    padding-left: 1em;
}

ul li::before {
    content: "\2014\2002";
}

ul.story li::before {
    content: "\203a\2002";
    color: #aaa;
}

ul.story time {
    font-size: 75%;
}

th, td {
    padding: 0.3em 1em;
}

th {
    text-align: center;
    font-family: var(--heading-font);
    font-weight: normal;
    background: var(--table-heading-background);
}

td {
    border-bottom: 1px solid #aaa;
}

blockquote {
    border-left: 0.3em solid var(--table-heading-background);
    font-style: italic;
    margin-left: 1em;
    padding: 0.1em 1em;
}

pre, code {
    font-family: var(--code-font);
    font-size: 90%;

    font-variant-ligatures: none;
    text-align: left;
	white-space: pre;
	word-spacing: normal;
	word-break: normal;
	word-wrap: normal;

    -moz-tab-size: 4;
	tab-size: 4;

	hyphens: none;
}

code {
    border-radius: 0.25em;
    padding: 0 0.3em;
    background: var(--code-background);
}

pre {
    padding: 0.5em 1em;
    overflow-x: auto;
    background: var(--pre-background);
}

pre code {
    padding: 0;
    background: transparent;
}

.info, .warning {
    padding: 0.3em 1em;
}

.info {
    background: var(--info-color);
}

.warning {
    background: var(--warning-color);
}

.collapse {
    cursor: pointer;
}

.collapse > * {
    height: auto;
}

.collapse::after {
    content: "\f102";
    font-family: ForkAwesome;
    display: block;
    text-align: center;
    margin-top: -7rem;
    padding-top: 5.5rem;
    position: relative;
    z-index: -1;
}

.collapse:hover::after {
    color: var(--link-color);
}

.collapse.closed > * {
    height: 4.5rem;
    overflow: hidden;
}

.collapse.closed::after {
    content: "\f103";
    background: linear-gradient(transparent, white 5rem);
    z-index: auto;
}

/* Icon lists */
.fa-ul {
    margin-left: 1rem;
}

.fa-ul > li {
    text-indent: -1rem;
}

.fa-ul > li > i {
    width: 0.8rem;
    text-align: center;
}

.fa-ul > li i.fa {
    color: var(--icon-color);
}

.fa-ul > li::before {
    content: none;
}

.fa-ul > li ul {
    padding-left: 0;
}

/* Label lists */
.topics {
    display: table;
    margin-left: 0;
    padding-left: 0;
}

@media (min-width: 58.5rem) {
    .topics {
        margin-left: 3rem;
    }
}

.topics li {
    text-indent: 0;
    padding: 0;
}

.topics li::before {
    content: none;
}

.topics > li {
    display: table-row;
}

.topics > li > a,
.topics > li > ul {
    display: table-cell;
    vertical-align: middle;
}

.topics > li > a img {
    width: 4rem;
    display: block;
    margin-right: 1rem;
}

.topics > li > ul {
    padding: 0.5rem 0;
}

.keywords {
    margin-top: 0.5rem;
    padding: 0;
}

.keywords li {
    display: inline-block;
    background-color: var(--keyword-color);
    font-family: var(--keyword-font);
    border-radius: 1rem;
    text-indent: 0;
    padding: 0 1rem;
    margin-right: 0.3rem;
    margin-top: 0.1rem;
}

.keywords li::before {
    content: none;
}

/* Shadowed block */
pre,
.info,
.warning,
article section img,
table {
    -webkit-box-shadow: 0px 3px 6px 0px var(--shadow-color);
    -moz-box-shadow:    0px 3px 6px 0px var(--shadow-color);
    box-shadow:         0px 3px 6px 0px var(--shadow-color);
    margin-top:    calc(2rem - 6px);
    margin-bottom: 2rem;
}

/* Outlined block */
article section img,
table {
    border: 10px solid white;
    margin-left: auto;
    margin-right: auto;
    max-width: calc(50rem - 30px);
}

/* Shadowed text */
h1, h2, h3, h4,
.collapse:after {
    -webkit-text-shadow: 0px 1px 2px var(--text-shadow-color);
    -moz-text-shadow:    0px 1px 2px var(--text-shadow-color);
    text-shadow:         0px 1px 2px var(--text-shadow-color);
}

/* Index page */

main.index h1 {
    text-align: center;
}

main.index h2 {
    background-color: transparent;
}

img.portrait {
    height: 20vh;
    -webkit-box-shadow: none;
    -moz-box-shadow: none;
    box-shadow:none;
    display: table;
    margin: 0 auto;
}

@media (min-width: 40rem) {
    img.portrait {
        float: right;
    }
}