* {
    box-sizing: border-box;
}

:root {
    --black: #050505;
    --white: #fafafa;
    --error: #da0000;
    --info: #669aba;

    --ratio: 1.5;
    --s0: 1rem;
    --s1: calc(var(--s0) * var(--ratio));
    font-size: calc(1rem + 0.5vw);
    font-family: monospace;
}

@media (prefers-color-scheme: dark) {
    :root {
        --background: var(--black);
        --color: var(--white);
    }
}

@media (prefers-color-scheme: light) {
    :root {
        --background: var(--white);
        --color: var(--black);
    }
}

body {
    background-color: var(--background);
    color: var(--color);
}

.center {
    box-sizing: content-box;
    max-inline-size: 60ch;
    margin-inline: auto;
    padding-inline-start: var(--s1);
    padding-inline-end: var(--s1);
}

#logo {
    height: 5em;
    display: inline-block;
}

header > h1 {
    color: var(--header);
    display: inline-block;
}

li:has(a:focus)::marker {
    content: "==> ";
}

li:has(a:hover)::marker {
    content: " >";
}

li:has(a:hover:focus)::marker {
    content: "==>";
}

li::marker {
    content: "> ";
}

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

a:empty::before {
    content: attr(href);
}

input[type="text"] {
    width: 80%;
    display: inline-block;
    background-color: var(--background);
    color: var(--color);
    border-color: var(--color);
    border-radius: 0.5em;
}

input[type="text"] {
    width: 100%;
    display: inline-block;
    margin-inline: 0 1em;
    font-family: monospace;
    white-space: pre-wrap;
    background-color: var(--background);
    color: var(--color);
    border-color: var(--border);
    border-radius: 0.5em;
}

label + input {
    margin-block-end: 1em;
}

label {
    display: block;
}

textarea {
    width: 100%;
    display: block;
    margin-inline: 0 1em;
    font-family: monospace;
    white-space: pre-wrap;
    background-color: var(--background);
    color: var(--color);
    border-color: var(--border);
    border-radius: 0.5em;
}

pre {
    font-family: monospace;
    white-space: pre-line;
}

button,
input[type="button"],
input[type="submit"],
input[type="file"]::file-selector-button {
    min-width: 20%;
    display: inline-block;
    color: var(--color);
    background-color: var(--background);
    border: 1px solid var(--color);
    border-radius: 0.5em;
    padding: 0.1em 1em;
    cursor: pointer;
    font-family: monospace;
}


.flex-row {
    display: flex;
    gap: 1em;
}

.flex-spread {
    display: flex;
    gap: 1em;
    justify-content: space-between;
}

.history {
    filter: opacity(30%);
}

div + .history {
    margin-block-start: 2em;
}

main {
    border-block-start: 2px dotted var(--color);
    border-block-end: 2px dotted var(--color);
    padding-block: 1em;
}

.docs {
    margin: 2em 0;
    border: 2px dashed var(--color);
    padding: 0.5em 1em;
    border-radius: 0.5em;
}

.error::before {
    content: "ERR: ";
    color: var(--error);
}

.info::before {
    content: "INF: ";
    color: var(--info);
}

label:has(> #debug:not(:checked)) + #log .debug {
    display: none;
}

.debug::before {
    content: "DBG: ";
    color: var(--info);
}

.row + .row {
    margin-block-start: 1em;
}

.noselect {
    user-select: none;
    -moz-user-select: -moz-none;
    -webkit-user-select: none;
    -ms-user-select: none;
}

img {
    margin-inline: auto;
    margin-block: 1em;
}

footer > ul {
    columns: 2;
}

legend::before {
    content: "( ";
}

legend::after {
    content: " )";
}

summary {
    cursor: help;
}

summary::marker {
    content: ">    ";
}

details[open] summary::marker {
    content: "x    ";
}

input[type="checkbox"] {
    appearance: none;
}
input[type="checkbox"]:checked::after {
    content: "[x]"
}

input[type="checkbox"]::after {
    content: "[ ]"
}