:root {
    /* TODO: proper color scheme  */
    --text-color: #111111;
    --bg-color: #ffffff;
    --bg-color-transparent: #ffffff77;
    --dimmed-text: #ababab;
    --color-1: #F2385A;
    --color-2: #F5A503;
    --mono-font: 'Fira Code', monospace;
    --text-font: 'Fira GO', sans-serif;
}

@media (prefers-color-scheme: dark) {
    :root {
        --text-color: #ffffff;
        --bg-color: #111111;
        --bg-color-transparent: #11111177;
        --dimmed-text: #555;
    }
}

html {
    font-family: var(--text-font);
    line-height: 1.6;
    font-size: 1.3rem;
}

body {
    margin: 0;
    height: 100vh;
    background-color: var(--bg-color);
    color: var(--text-color);
}

img {
    /* https://developer.mozilla.org/en-US/docs/Learn/CSS/CSS_layout/Responsive_Design#responsive_images */
    max-width: 100%;
}

h1 {
    font-size: 2.6em;
    font-weight: 900;
    background: -webkit-linear-gradient(top left, var(--color-1), var(--color-2) 61%);
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

blockquote {
    font-style: italic;
}

pre {
    overflow: auto;
    word-wrap: normal;
    white-space: pre;
}

.mono {
    font-family: var(--mono-font);
    font-size: 0.9rem;
}

pre, code {
    font-family: var(--mono-font);
    font-size: 0.9rem;
    color: var(--color-2);
}

main {
    margin-left: 1rem;
    margin-right: 1rem;
}

@media (min-width: 72ch) {
    main {
        grid-area: content;
        /* Source: https://jrl.ninja/etc/1/ */
        max-width: 72ch;
        padding: 1.5rem;
        margin: auto;
    }
}

div.wrapper {
    display: grid;
    height: 100%;
    grid-template-areas: "header""main""footer";
    grid-template-rows: max-content 1fr max-content;
}

div.main {
    grid-area: main;
    max-width: 100vw;
}

div.header {
    grid-area: header;
}

div.footer {
    grid-area: footer;
}

.header-bar {
    display: flex;
    flex-flow: row;
    align-items: center;
    justify-content: space-between;
    max-width: 72ch;
    margin: auto;
    padding: 2rem 1rem;
}

.header-menu {
    display: flex;
    align-items: baseline;
}

.mobile-menu {
    display: block;
}

details.mobile-menu>summary {
    font-size: 0;
    list-style: none;
    text-align: center;
    transition: transform 300ms ease-in-out;
}

details.mobile-menu[open]>summary {
    color: var(--dimmed-text);
    transform: rotate(90deg);
}

.dropdown {
    position: absolute;
    background-color: var(--bg-color);
    width: min(72ch, calc(100% - 2rem));
}

@supports (backdrop-filter: blur(20px)) or (-webkit-backdrop-filter: blur(20px)) {
    .dropdown {
        background-color: var(--bg-color-transparent);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
    }
}

.hamburger {
    width: 2rem;
    height: 2rem;
}

.nav-icon {
    width: 2rem;
    height: 2rem;
}

@media (prefers-color-scheme: dark) {
    .invert-if-dark {
        filter: invert(1);
    }
}

.valign {
    vertical-align: middle;
}

.sm-margin-right {
    margin-right: 1rem;
}

.sm-margin-bottom {
    margin-bottom: 1rem;
}

.sm-margin-top {
    margin-top: 1rem;
}

.right {
    float: right;
}

.bold {
    font-weight: bold;
}

ul.nav {
    display: flex;
    flex-flow: column;
    align-items: center;
}

ul.nobullets {
    list-style: none;
    margin: 0;
    padding: 0;
}

ul.nav>li {
    padding: 1rem 0;
    margin: 0 2rem 0 2rem;
    width: 100%;
    text-align: center;
}

ul.nav>li:hover, ul.nav>li:focus {
    background-color: var(--color-1);
    transition: background-color 300ms ease-in-out;
}

.reset-color, .reset-color:hover, .reset-color:visited, .reset-color:active {
    color: var(--text-color);
}

a {
    color: var(--color-1);
}

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

a:visited {
    color: var(--dimmed-text);
}

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

a:active {
    text-decoration: none;
}

.center {
    text-align: center;
}