/* taken over from github.com/kevquirk/simple.css */

/* Global variables. */
:root,
::backdrop {
    /* Set sans-serif & mono fonts */
    --sans-font: IBM Plex Sans, Inter, Roboto, 'Helvetica Neue', 'Arial Nova', 'Nimbus Sans', Arial, sans-serif;
    --serif-font: "Source Serif 4", Georgia, Cambria, "Times New Roman", Times, serif;
    --mono-font: "IBM Plex Mono", Consolas, Menlo, Monaco, "Andale Mono", "Ubuntu Mono",
        monospace;
    --standard-border-radius: 5px;

    /* Default (light) theme */
    --bg: #fff;
    --text: black;
    --text-light: #585858;
    --border: black;
    --accent-bg: #fff4ff;
    --accent: #008632;
    --accent-hover: #05772d;
    --accent-text: var(--bg);
    --code: #dc3522;
    --preformatted: #444;
    --marked: #ffdd33;
    --disabled: #efefef;
}

/* Dark theme - follows system preference */
@media (prefers-color-scheme: dark) {
    :root,
    ::backdrop {
        color-scheme: dark;
        --bg: #212121;
        --accent-bg: #2b2b2b;
        --text: #dcdcdc;
        --text-light: #ababab;
        --border: #dcdcdc;
        --accent: #afea00;
        --accent-hover: #d4ff4d;
        --accent-text: var(--bg);
        --code: #f06292;
        --preformatted: #ccc;
        --disabled: #111;
    }
}

/* Reset box-sizing */
*,
*::before,
*::after {
    box-sizing: border-box;
}

/* Reset default appearance */
textarea,
select,
input,
progress {
    appearance: none;
    -webkit-appearance: none;
    -moz-appearance: none;
}

html {
    /* Set the font globally */
    font-family: var(--sans-font);
    scroll-behavior: smooth;
    /* Make page slightly taller than viewport to ensure scrollbar is always visible */
    min-height: 101vh;
}

/* Make the body a nice central block */
body {
    color: var(--text);
    background-color: var(--bg);
    font-size: 1.15rem;
    line-height: 1.55;
    display: grid;
    grid-template-columns: 1fr min(50rem, 92%) 1fr;
    margin: 0;
}
body > * {
    grid-column: 2;
}

/* Make the header bg full width, but the content inline with body */
body > header {
    background-color: var(--accent-bg);
    border-bottom: 1px solid var(--border);
    text-align: center;
    padding: 0.5rem;
    grid-column: 1 / -1;
}

body > header > *:only-child {
    margin-block-start: 0;
}

body > header h1 {
    margin: 0;
}

body > header p {
    max-width: 40rem;
    margin: 1rem auto;
}

.footnotes {
    margin-top: 3rem;
    /* Extend lines to match image width: calc(100% + 1rem) */
    width: calc(100% + 1rem);
    margin-left: -0.5rem;
}

.footnotes > ol {
    font-size: 0.95rem;
}

/* Format headers */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--serif-font);
    font-style: italic;
    font-weight: 800;
}

h1 {
    font-size: 3rem;
    /* Match image/h2 width on desktop */
    width: calc(100% + 1rem);
    margin-left: -0.5rem;
}

@media only screen and (max-width: 720px) {
    h1 {
        width: 100%;
        margin-left: 0;
    }
}

h2 {
    font-size: 2.6rem;
    margin-top: 3rem;
    /* Line-through heading style with small caps */
    display: flex;
    align-items: center;
    gap: 1rem;
    font-variant: small-caps;
    font-style: normal;
    /* Extend lines to match image width: calc(100% + 1rem) */
    width: calc(100% + 1rem);
    margin-left: -0.5rem;
}

h2::before,
h2::after {
    content: '';
    flex: 1;
    border-bottom: 1px solid var(--border);
}

@media only screen and (max-width: 720px) {
    h2 {
        /* Match image width on mobile: 96% centered */
        width: 96%;
        margin-left: auto;
        margin-right: auto;
    }
}

h3 {
    font-size: 2rem;
    margin-top: 3rem;
}

h4 {
    font-size: 1.44rem;
}

h5 {
    font-size: 1.15rem;
}

h6 {
    font-size: 0.96rem;
}

p {
    margin: 1.2rem 0;
}

li:not(:last-child) {
    margin-bottom: 0.3rem;
}

/* Prevent long strings from overflowing container */
p,
h1,
h2,
h3,
h4,
h5,
h6 {
    overflow-wrap: break-word;
}

/* Fix line height when title wraps */
h1,
h2,
h3 {
    line-height: 1.1;
}

/* Reduce header size on mobile */
@media only screen and (max-width: 720px) {
    h1 {
        font-size: 2.5rem;
    }

    h2 {
        font-size: 2.1rem;
    }

    h3 {
        font-size: 1.75rem;
    }

    h4 {
        font-size: 1.25rem;
    }
}

/* Format links & buttons */
a,
a:visited {
    color: var(--accent);
}

a:hover {
    text-decoration: none;
}

button,
.button,
a.button, /* extra specificity to override a */
input[type="submit"],
input[type="reset"],
input[type="button"],
label[type="button"] {
    border: 1px solid var(--accent);
    background-color: var(--accent);
    color: var(--accent-text);
    padding: 0.5rem 0.9rem;
    text-decoration: none;
    line-height: normal;
}

.button[aria-disabled="true"],
input:disabled,
textarea:disabled,
select:disabled,
button[disabled] {
    cursor: not-allowed;
    background-color: var(--disabled);
    border-color: var(--disabled);
    color: var(--text-light);
}

input[type="range"] {
    padding: 0;
}

/* Set the cursor to '?' on an abbreviation and style the abbreviation to show that there is more information underneath */
abbr[title] {
    cursor: help;
    text-decoration-line: underline;
    text-decoration-style: dotted;
}

button:enabled:hover,
.button:not([aria-disabled="true"]):hover,
input[type="submit"]:enabled:hover,
input[type="reset"]:enabled:hover,
input[type="button"]:enabled:hover,
label[type="button"]:hover {
    background-color: var(--accent-hover);
    border-color: var(--accent-hover);
    cursor: pointer;
}

.button:focus-visible,
button:focus-visible:where(:enabled),
input:enabled:focus-visible:where(
        [type="submit"],
        [type="reset"],
        [type="button"]
    ) {
    outline: 2px solid var(--accent);
    outline-offset: 1px;
}

/* Format navigation */
header > nav {
    font-size: 1rem;
    line-height: 2;
    padding: 0.6rem 0 0.75rem;
}

header > nav a,
header > nav a:visited {
    color: var(--text);
    text-decoration: none;
}

header > nav a:hover {
    color: var(--accent);
}

@media (prefers-color-scheme: dark) {
    header > nav a,
    header > nav a:visited {
        color: var(--code);
    }
    header > nav a:hover {
        color: var(--accent);
    }
    body > header {
        border-bottom-color: #4a4f51;
    }
}

/* Consolidate box styling */
aside,
details,
progress {
    background-color: var(--accent-bg);
    border: 1px solid var(--border);
    border-radius: var(--standard-border-radius);
    margin-bottom: 1rem;
}

aside {
    font-size: 1rem;
    width: 30%;
    padding: 0 15px;
    margin-inline-start: 15px;
    float: right;
}
*[dir="rtl"] aside {
    float: left;
}

/* Make aside full-width on mobile */
@media only screen and (max-width: 720px) {
    aside {
        width: 100%;
        float: none;
        margin-inline-start: 0;
    }
}

article,
fieldset,
dialog {
    border: 1px solid var(--border);
    padding: 1rem;
    border-radius: var(--standard-border-radius);
    margin-bottom: 1rem;
}

article h2:first-child,
section h2:first-child,
article h3:first-child,
section h3:first-child {
    margin-top: 1rem;
}

section {
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
    padding: 2rem 1rem;
    margin: 3rem 0;
}

/* Don't double separators when chaining sections */
section + section,
section:first-child {
    border-top: 0;
    padding-top: 0;
}

section + section {
    margin-top: 0;
}

section:last-child {
    border-bottom: 0;
    padding-bottom: 0;
}

details {
    padding: 0.7rem 1rem;
}

summary {
    cursor: pointer;
    font-weight: bold;
    padding: 0.7rem 1rem;
    margin: -0.7rem -1rem;
    word-break: break-all;
}

details[open] > summary + * {
    margin-top: 0;
}

details[open] > summary {
    margin-bottom: 0.5rem;
}

details[open] > :last-child {
    margin-bottom: 0;
}

/* Format tables */
table {
    border-collapse: collapse;
    margin: 1.5rem 0;
}

figure > table {
    width: max-content;
    margin: 0;
}

td,
th {
    border: 1px solid var(--border);
    text-align: start;
    padding: 0.5rem;
}

th {
    background-color: var(--accent-bg);
    font-weight: bold;
}

tr:nth-child(even) {
    /* Set every other cell slightly darker. Improves readability. */
    background-color: var(--accent-bg);
}

table caption {
    font-weight: bold;
    margin-bottom: 0.5rem;
}

/* Format forms */
textarea,
select,
input,
button,
.button {
    font-size: inherit;
    font-family: inherit;
    padding: 0.5rem;
    margin-bottom: 0.5rem;
    border-radius: var(--standard-border-radius);
    box-shadow: none;
    max-width: 100%;
    display: inline-block;
}
textarea,
select,
input {
    color: var(--text);
    background-color: var(--bg);
    border: 1px solid var(--border);
}
label {
    display: block;
}
textarea:not([cols]) {
    width: 100%;
}

/* Add arrow to drop-down */
select:not([multiple]) {
    background-image: linear-gradient(45deg, transparent 49%, var(--text) 51%),
        linear-gradient(135deg, var(--text) 51%, transparent 49%);
    background-position: calc(100% - 15px), calc(100% - 10px);
    background-size:
        5px 5px,
        5px 5px;
    background-repeat: no-repeat;
    padding-inline-end: 25px;
}
*[dir="rtl"] select:not([multiple]) {
    background-position: 10px, 15px;
}

/* checkbox and radio button style */
input[type="checkbox"],
input[type="radio"] {
    vertical-align: middle;
    position: relative;
    width: min-content;
}

input[type="checkbox"] + label,
input[type="radio"] + label {
    display: inline-block;
}

input[type="radio"] {
    border-radius: 100%;
}

input[type="checkbox"]:checked,
input[type="radio"]:checked {
    background-color: var(--accent);
}

input[type="checkbox"]:checked::after {
    /* Creates a rectangle with colored right and bottom borders which is rotated to look like a check mark */
    content: " ";
    width: 0.18em;
    height: 0.32em;
    border-radius: 0;
    position: absolute;
    top: 0.05em;
    left: 0.17em;
    background-color: transparent;
    border-right: solid var(--bg) 0.08em;
    border-bottom: solid var(--bg) 0.08em;
    font-size: 1.8em;
    transform: rotate(45deg);
}
input[type="radio"]:checked::after {
    /* creates a colored circle for the checked radio button  */
    content: " ";
    width: 0.25em;
    height: 0.25em;
    border-radius: 100%;
    position: absolute;
    top: 0.125em;
    background-color: var(--bg);
    left: 0.125em;
    font-size: 32px;
}

/* Makes input fields wider on smaller screens */
@media only screen and (max-width: 720px) {
    textarea,
    select,
    input {
        width: 100%;
    }

}

/* Set a height for color input */
input[type="color"] {
    height: 2.5rem;
    padding: 0.2rem;
}

/* do not show border around file selector button */
input[type="file"] {
    border: 0;
}

/* Misc body elements */
hr {
    border: none;
    height: 1px;
    background: var(--border);
    margin: 0.5rem auto;
}

mark {
    padding: 2px 5px;
    border-radius: var(--standard-border-radius);
    background-color: var(--marked);
    color: black;
}

mark a {
    color: #0d47a1;
}

img,
video {
    max-width: none;
    width: calc(100% + 1rem);
    margin-left: -0.5rem;
    height: auto;
}

@media only screen and (max-width: 720px) {
    img,
    video {
        width: 96%;
        max-width: 96%;
        margin-left: auto;
        margin-right: auto;
        display: block;
    }
}

figure {
    margin: 0;
    display: block;
    overflow-x: auto;
}

figure > img,
figure > picture > img {
    display: block;
    margin-inline: auto;
}

figcaption {
    text-align: center;
    font-size: 0.9rem;
    color: var(--text-light);
    margin-block: 1rem;
}

blockquote {
    margin-inline-start: 0;
    margin-inline-end: 0;
    margin-block: 0;
    padding-block: 0;
    border-inline-start: 0.35rem solid var(--accent);
    color: var(--text);
    font-style: normal;
}

blockquote p {
    padding-left: 2rem;
}
blockquote p:first-child {
    margin-top: 0;
}

blockquote p:last-child {
    margin-bottom: 0;
}

/* Use mono font for code elements */
code,
pre,
pre span,
kbd,
samp {
    font-family: var(--mono-font);
    font-size: 0.9em;
    color: var(--code);
}

kbd {
    color: var(--preformatted);
    border: 1px solid var(--preformatted);
    border-bottom: 3px solid var(--preformatted);
    border-radius: var(--standard-border-radius);
    padding: 0.1rem 0.4rem;
}

pre {
    background-color: var(--bg);
    border: 1px solid var(--border);
    border-radius: 0;
    padding: 1rem 1.4rem;
    max-width: 100%;
    overflow: auto;
    color: var(--preformatted);
    margin-bottom: 1rem;
}

/* Fix embedded code within pre */
pre code {
    color: var(--preformatted);
    background: none;
    margin: 0;
    padding: 0;
}

/* Superscript & Subscript */
/* Prevent scripts from affecting line-height. */
sup,
sub {
    vertical-align: baseline;
    position: relative;
}

sup {
    top: -0.4em;
}

sub {
    top: 0.3em;
}

/* Article list grid layout (home page) */
.article-link {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 1rem;
    align-items: baseline;
    margin-bottom: 0.5rem;
}

.article-link a {
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.article-date {
    color: var(--text);
    font-size: 0.9rem;
    white-space: nowrap;
}

/* Mobile: stack title and date vertically */
@media only screen and (max-width: 720px) {
    .article-link {
        grid-template-columns: 1fr;
        gap: 0;
    }
}

/* Page metadata (all pages) */
.page-meta {
    margin-bottom: 1rem;
    text-align: right;
}

/* Inline emoji: displays image, copies as text (all pages) */
.inline-emoji-image {
    display: inline-block;
    width: 1.3rem;
    height: 1.3rem;
    background-image: url('/img/smile.webp');
    background-size: contain;
    background-repeat: no-repeat;
    color: transparent;
    vertical-align: middle;
    font-size: 1px;
    line-height: 0;
    overflow: hidden;
}

/* Reduce gap between header and content */
main > h1:first-child,
main > .page-meta + h1 {
    margin-top: 0;
}