html,
body {
    margin: 0;
    padding: 0;
    box-sizing: border-box;

    --font-serif: 'IBM Plex Serif', 'Times New Roman', serif;
    --font-mono: 'Menlo', 'Monaco', monospace;

    /* default light-mode colors */
    --foreground-default: #222;
    --foreground-light: #778;
    --foreground-visited: #99a;
    --background-default: #f8f8f8;
    --background-block: #eee;
    --background-hero: #222;
    --accent: #11b6a5;
}

.inverted,
.type-page header {
    --foreground-default: #f8f8f8;
    --foreground-light: #d8d8d8;
    --background-default: #222;
    --background-block: #555;
    --background-hero: #eee;
}

html {
    /* adjust rem for page */
    font-size: 18px;
}

body {
    font-family: var(--font-serif);
    color: var(--foreground-default);
    background: var(--background-default);

    border-bottom: 8px solid var(--foreground-default);

    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

header,
footer {
    flex-grow: 0;
    flex-shrink: 0;
}

main {
    flex-grow: 1;
    flex-shrink: 0;
}

/* hack for this special case, so that on platforms with overscroll (macOS
 * touch, iOS), the overscroll matches hero/bottom border color */
body.type-page {
    background: var(--background-hero);
}

header,
main,
footer {
    background: var(--background-default);
}

a {
    color: var(--foreground-default)
}

.overlay {
    max-width: unset;
    width: calc(100% - 32px);
    margin-left: auto;
    margin-right: auto;
}

/* TYPOGRAPHY */

h1,
h2,
h3,
h4 {
    font-weight: normal;
    line-height: 1.325em;
    color: var(--foreground-default);
    margin: 2em 0 1em 0;
}

.hero h1 {
    margin-top: 0;
    margin-bottom: .5em;
}

.type-home h1 {
    margin-top: 1em;
    font-size: 2rem;
}

h1 {
    font-size: 2rem;
}

h2 {
    font-size: 1.5rem;
}

h3 {
    font-size: 1.25rem;
}

h4 {
    font-size: 1em;
}

p, li {
    font-size: 1rem;
    line-height: 1.625em;
    margin: 1em 0;
}

article h2,
article h3,
article h4 {
    font-weight: bold;
}

main a {
    text-decoration: underline;
    text-decoration-color: var(--accent);
    text-decoration-thickness: 2px;
    text-underline-offset: 0.0625em;
    transition: text-decoration-color .2s;
}

main a:hover {
    text-decoration-color: var(--foreground-light);
}

/* PROJECTS PAGE */

main.projects h3 {
    font-size: 1em;
    margin-top: 1em;
    margin-bottom: 0.25em;
}

main.projects h3 + p {
    margin-top: 0;
}

/* POSTS PAGE */

.postlist-year {
    border-bottom: 0;
}

.postlist-year:first-of-type {
    /* don't display the current year */
    display: none;
}

.postlist p {
    margin: .75em 0;
}

.postlist p.starred {
    /* anchor for starred icon */
    position: relative;
}

.postlist p.starred a::before {
    content: '✱';
    display: inline;
    position: absolute;
    top: 0;
    left: -1.25em;
    color: var(--accent);
    line-height: inherit;
}

/* just for .postlist p.starred a::before */
@media only screen and (max-width: 800px) {
    .postlist p.starred a::before {
        position: static;
        margin-right: 0.5em;
    }
}

.postlist p a {
    text-decoration: none;
}

.postlist p a:visited {
    color: var(--foreground-visited);
}

.dateprefix {
    font-size: .8em;
    font-style: italic;
    color: var(--foreground-light);
    margin-left: .25em;
    white-space: nowrap;
}

/* DESKTOP UI */

.desktop {
    display: none !important;
}

@media only screen and (min-width: 600px) {
    .overlay {
        max-width: 700px;
    }

    h1 {
        font-size: 2.5rem;
    }

    h1,
    h2,
    h3,
    h4 {
        margin-top: 1.5em;
        margin-bottom: 1em;
    }

    .desktop {
        display: initial !important;
    }

    .mobile {
        display: none !important;
    }
}

/* HEADER */

header a {
    text-decoration: none;
}

header a:hover {
    text-decoration: underline;
}

header .overlay,
nav {
    display: flex;
    flex-direction: row;
    align-items: center;
    justify-content: flex-start;
    height: 100%;
}

header {
    background: var(--background-default);
    height: 100px;
}

.home {
    font-weight: bold;
    margin-right: 24px;
}

nav a {
    margin-right: 12px;
}

nav a.fade {
    color: var(--foreground-light);
}

/* FOOTER */

.prevInSection {
    text-align: left;
}

.nextInSection {
    text-align: right;
}

footer .overlay {
    height: 80px;
    display: flex;
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    padding-bottom: 32px;
}

footer .left {
    font-style: italic;
}

footer .right {
    height: 1em;
}

footer .right .square {
    display: inline-block;
    height: 1em;
    width: 1em;
    background: var(--foreground-default);
}

/* LANDING */

.type-home h1,
.type-home h2 {
    font-weight: bold;
    border-bottom: 0;
}

.type-home h1 {
    font-size: 1.5em;
}

.type-home h2 {
    font-size: 1em;
}

/* SINGLETON */

main {
    overflow: hidden;
}

.hero {
    background: var(--background-default);
    padding-top: 32px;
    margin-bottom: 36px;
}

.type-page .hero {
    padding-bottom: 32px;
}

.meta {
    color: var(--foreground-light);
    display: flex;
    flex-direction: row;
    justify-content: space-between;
}

.meta-item {
    flex-grow: 1;
    text-align: left;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

p img {
    margin: 1.5em 0;
    width: 100%;
    max-width: 700px;
}

p img.blend-multiply {
    mix-blend-mode: multiply;
}

@media only screen and (max-width: 600px) {
    p img {
        width: 100vw;
        max-width: unset;
        position: relative;
        top: 0;
        left: -16px;
    }
}

pre, code {
    font-family: var(--font-mono);
}

pre {
    display: block;
    margin: 1.5em 0;
    background: var(--background-block);
    overflow-x: auto;
    overflow-y: hidden;
    -webkit-overflow-scrolling: touch;
    width: 100%;
    display: flex;
    flex-direction: row;
}

pre > code {
    line-height: 1.5em;
    flex-shrinK: 0;
    display: block;
    padding: 1em;
}

code {
    background: var(--background-block);
}

li code,
p code {
    padding: 3px 5px;
}