/*
 * Quire's default theme.
 *
 * Plain CSS with custom properties: change the look by overriding the properties in a stylesheet of your
 * own, e.g. in a child theme or in the site's assets/styles/app.css:
 *
 *     :root { --font-body: Georgia, serif; --measure: 40rem; }
 *
 * Colours meet WCAG 2.2 AA (at least 4.5:1 for text) in light and dark mode, for every accent colour.
 * Spacing uses logical properties, so right-to-left languages are laid out mirrored.
 */

:root {
    --font-body: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --font-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
    --font-size: 1.0625rem;
    --line-height: 1.65;
    --measure: 42rem;
    --container: 68rem;
    --space: 1.5rem;
    --radius: 0.5rem;

    --color-bg: #ffffff;
    --color-surface: #f6f8fa;
    --color-text: #1f2328;
    --color-muted: #59636e;
    --color-border: #d1d9e0;
    --color-accent: #0969da;
    /* Text on the accent colour, e.g. on buttons */
    --color-on-accent: #ffffff;
    --color-danger: #cf222e;

    color-scheme: light dark;
}

.accent-green { --color-accent: #1a7f37; }
.accent-purple { --color-accent: #8250df; }
.accent-orange { --color-accent: #bc4c00; }
.accent-red { --color-accent: #cf222e; }

@media (prefers-color-scheme: dark) {
    :root {
        --color-bg: #0d1117;
        --color-surface: #151b23;
        --color-text: #e6edf3;
        --color-muted: #9198a1;
        --color-border: #3d444d;
        --color-accent: #4493f8;
        --color-on-accent: #0d1117;
        --color-danger: #f85149;
    }

    .accent-green { --color-accent: #3fb950; }
    .accent-purple { --color-accent: #ab7df8; }
    .accent-orange { --color-accent: #f0883e; }
    .accent-red { --color-accent: #f85149; }
}

/* Base */

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

html {
    -webkit-text-size-adjust: 100%;
    text-size-adjust: 100%;
}

body {
    margin: 0;
    min-block-size: 100vh;
    display: flex;
    flex-direction: column;
    background: var(--color-bg);
    color: var(--color-text);
    font-family: var(--font-body);
    font-size: var(--font-size);
    line-height: var(--line-height);
    overflow-wrap: break-word;
}

a {
    color: var(--color-accent);
    text-underline-offset: 0.15em;
}

a:hover {
    text-decoration-thickness: 2px;
}

:focus-visible {
    outline: 3px solid var(--color-accent);
    outline-offset: 2px;
    border-radius: 2px;
}

main:focus {
    outline: none;
}

img,
video,
svg {
    max-inline-size: 100%;
    block-size: auto;
}

h1,
h2,
h3,
h4 {
    line-height: 1.25;
    margin-block: 1.6em 0.6em;
    text-wrap: balance;
}

h1 {
    font-size: clamp(1.75rem, 1.4rem + 1.5vw, 2.5rem);
    margin-block-start: 0;
}

h2 {
    font-size: 1.5rem;
}

h3 {
    font-size: 1.2rem;
}

p,
ul,
ol,
blockquote,
pre,
table,
figure {
    margin-block: 0 1.2em;
}

/* Layout */

.container {
    inline-size: min(100% - 2 * var(--space), var(--container));
    margin-inline: auto;
}

/* Without a sidebar, the header and footer line up with the text. */
body:has(.page:not(.has-sidebar)) .container {
    inline-size: min(100% - 2 * var(--space), var(--measure));
}

.page {
    flex: 1;
    padding-block: calc(2 * var(--space));
}

.page.has-sidebar {
    display: grid;
    gap: calc(2 * var(--space));
}

@media (min-width: 60rem) {
    .page.has-sidebar {
        grid-template-columns: minmax(0, 1fr) 18rem;
    }
}

main {
    max-inline-size: var(--measure);
}

.page:not(.has-sidebar) main {
    margin-inline: auto;
}

.sidebar {
    font-size: 0.95rem;
}

/* Header and footer */

.site-header {
    border-block-end: 1px solid var(--color-border);
    padding-block: var(--space);
}

.site-header .container {
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    gap: 0.25rem 1.5rem;
}

.site-title {
    color: var(--color-text);
    font-size: 1.25rem;
    font-weight: 700;
    text-decoration: none;
}

.site-title:hover {
    text-decoration: underline;
}

.site-description {
    margin: 0;
    color: var(--color-muted);
}

.site-nav {
    margin-inline-start: auto;
}

.site-nav ul {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin: 0;
    padding: 0;
    list-style: none;
}

.site-footer {
    border-block-start: 1px solid var(--color-border);
    padding-block: var(--space);
    color: var(--color-muted);
    font-size: 0.9rem;
}

.site-footer a {
    color: inherit;
}

.credits {
    margin: 0;
}

/* Content */

.entry-header {
    margin-block-end: calc(1.5 * var(--space));
}

.entry-meta {
    margin: 0;
    color: var(--color-muted);
    font-size: 0.95rem;
}

.entry-footer {
    margin-block-start: calc(2 * var(--space));
    padding-block-start: var(--space);
    border-block-start: 1px solid var(--color-border);
}

.card {
    padding-block: var(--space);
    border-block-end: 1px solid var(--color-border);
}

.card:first-of-type {
    padding-block-start: 0;
}

.card h2 {
    margin-block: 0 0.3em;
    font-size: 1.35rem;
}

.card h2 a {
    color: var(--color-text);
    text-decoration: none;
}

.card h2 a:hover {
    color: var(--color-accent);
    text-decoration: underline;
}

.card p:last-child {
    margin-block-end: 0;
}

.pagination {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    margin-block-start: calc(2 * var(--space));
    color: var(--color-muted);
}

/* Forms, e.g. signing in. Field borders use the muted text colour: at least 3:1 against the page. */

.notice {
    padding: 0.75rem 1rem;
    margin-block-end: var(--space);
    background: var(--color-surface);
    border-inline-start: 4px solid var(--color-accent);
    border-radius: var(--radius);
}

.sign-in {
    max-inline-size: 24rem;
}

.form-field label {
    display: block;
    margin-block-end: 0.3rem;
    font-weight: 600;
}

.form-field input {
    inline-size: 100%;
    padding: 0.6rem 0.75rem;
    background: var(--color-bg);
    color: var(--color-text);
    border: 1px solid var(--color-muted);
    border-radius: var(--radius);
    font: inherit;
}

.form-check {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.form-check input {
    inline-size: 1.15rem;
    block-size: 1.15rem;
    accent-color: var(--color-accent);
}

button,
.button {
    display: inline-block;
    padding: 0.6rem 1.25rem;
    background: var(--color-accent);
    color: var(--color-on-accent);
    border: 0;
    border-radius: var(--radius);
    font: inherit;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
}

button:hover,
.button:hover {
    text-decoration: underline;
}

.form-error {
    padding: 0.75rem 1rem;
    background: var(--color-surface);
    border-inline-start: 4px solid var(--color-danger);
    border-radius: var(--radius);
}

/* Hints and errors under a field */
.form-hint,
.form-field .form-error {
    display: block;
    margin-block-start: 0.3rem;
    font-size: 0.9rem;
}

.form-hint {
    color: var(--color-muted);
}

.form-field .form-error {
    padding: 0.25rem 0.75rem;
}

.form-field input[aria-invalid="true"] {
    border-color: var(--color-danger);
}

.sign-in-options {
    margin-block-start: calc(1.5 * var(--space));
    padding-block-start: var(--space);
    border-block-start: 1px solid var(--color-border);
}

/* Text written in the editor */

.prose blockquote {
    margin-inline: 0;
    padding-inline-start: 1rem;
    border-inline-start: 4px solid var(--color-border);
    color: var(--color-muted);
}

.prose code,
.prose pre {
    font-family: var(--font-mono);
    font-size: 0.9em;
}

.prose code {
    padding: 0.1em 0.35em;
    background: var(--color-surface);
    border-radius: 0.3em;
}

.prose pre {
    padding: 1rem;
    overflow-x: auto;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    line-height: 1.5;
}

.prose pre code {
    padding: 0;
    background: none;
}

.prose table {
    inline-size: 100%;
    border-collapse: collapse;
    display: block;
    overflow-x: auto;
}

.prose th,
.prose td {
    padding: 0.5rem 0.75rem;
    border: 1px solid var(--color-border);
    text-align: start;
}

.prose th {
    background: var(--color-surface);
}

.prose img {
    border-radius: var(--radius);
}

.prose figcaption {
    color: var(--color-muted);
    font-size: 0.9rem;
}

.prose hr {
    border: 0;
    border-block-start: 1px solid var(--color-border);
    margin-block: calc(2 * var(--space));
}

/* Helpers */

.visually-hidden {
    position: absolute !important;
    inline-size: 1px;
    block-size: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip-path: inset(50%);
    white-space: nowrap;
    border: 0;
}

.skip-link {
    position: absolute;
    inset-inline-start: 1rem;
    inset-block-start: -10rem;
    z-index: 10;
    padding: 0.75rem 1rem;
    background: var(--color-bg);
    color: var(--color-accent);
    border: 2px solid var(--color-accent);
    border-radius: var(--radius);
}

.skip-link:focus {
    inset-block-start: 1rem;
}

@media (prefers-reduced-motion: no-preference) {
    html {
        scroll-behavior: smooth;
    }
}

@media print {
    .site-header,
    .site-footer,
    .sidebar,
    .pagination,
    .skip-link {
        display: none;
    }

    a {
        color: inherit;
    }
}