/* monopole.wiki - encyclopedic, swiss, minimalist */

:root {
    --wiki-white: #ffffff;
    --wiki-text: #202122;
    --wiki-blue: #3366cc;
    --infobox-fill: #f8f9fa;
    --caption-gray: #72777d;
    --border-gray: #a2a9b1;
    --row-alt: #eaecf0;

    --serif: "Merriweather", Georgia, "Times New Roman", serif;
    --sans: "Noto Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    --mono: "Roboto Mono", "SF Mono", Menlo, Consolas, monospace;

    --max-width: 1100px;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    background: var(--wiki-white);
    color: var(--wiki-text);
    font-family: var(--sans);
    font-size: 1rem;
    line-height: 1.8;
    text-rendering: optimizeLegibility;
    -webkit-font-smoothing: antialiased;
}

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

a:hover {
    text-decoration: underline;
}

::selection {
    background: var(--wiki-blue);
    color: var(--wiki-white);
}

/* ---------- Site header ---------- */
.site-header {
    border-bottom: 1px solid var(--border-gray);
    background: var(--wiki-white);
    position: sticky;
    top: 0;
    z-index: 50;
    transition: box-shadow 200ms ease;
}

.site-header.is-shadowed {
    box-shadow: 0 1px 4px rgba(32, 33, 34, 0.06);
}

.site-header-inner {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 14px 24px;
    display: grid;
    grid-template-columns: auto 1fr auto;
    align-items: center;
    gap: 24px;
}

.site-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--wiki-text);
    text-decoration: none;
}

.site-logo:hover {
    text-decoration: none;
}

.logo-mark {
    display: inline-flex;
    width: 40px;
    height: 40px;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--border-gray);
    background: var(--infobox-fill);
    border-radius: 50%;
    font-family: var(--serif);
    font-weight: 900;
    font-size: 1.25rem;
    color: var(--wiki-text);
    letter-spacing: 0;
}

.logo-wordmark {
    display: flex;
    flex-direction: column;
    line-height: 1.1;
}

.logo-title {
    font-family: var(--serif);
    font-weight: 700;
    font-size: 1.1rem;
}

.logo-tagline {
    font-family: var(--sans);
    font-size: 0.72rem;
    color: var(--caption-gray);
    letter-spacing: 0.02em;
    margin-top: 2px;
}

.site-nav {
    display: flex;
    gap: 18px;
    justify-self: center;
}

.site-nav a {
    color: var(--wiki-text);
    font-size: 0.88rem;
    border-bottom: 2px solid transparent;
    padding: 6px 2px;
    transition: border-color 150ms ease, color 150ms ease;
}

.site-nav a:hover {
    text-decoration: none;
    color: var(--wiki-blue);
    border-bottom-color: var(--wiki-blue);
}

.site-search {
    display: flex;
    border: 1px solid var(--border-gray);
    border-radius: 2px;
    overflow: hidden;
    background: var(--wiki-white);
    transition: border-color 150ms ease, box-shadow 150ms ease;
}

.site-search:focus-within {
    border-color: var(--wiki-blue);
    box-shadow: 0 0 0 1px var(--wiki-blue);
}

.site-search input {
    border: 0;
    outline: 0;
    padding: 6px 10px;
    font-family: var(--sans);
    font-size: 0.88rem;
    width: 220px;
    background: transparent;
    color: var(--wiki-text);
}

.site-search button {
    border: 0;
    border-left: 1px solid var(--border-gray);
    background: var(--infobox-fill);
    padding: 6px 14px;
    font-family: var(--sans);
    font-size: 0.85rem;
    color: var(--wiki-text);
    cursor: pointer;
    transition: background 150ms ease;
}

.site-search button:hover {
    background: var(--row-alt);
}

/* ---------- Page grid ---------- */
.page {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 32px 24px 64px;
}

.page-grid {
    display: grid;
    grid-template-columns: 1fr 300px;
    gap: 2rem;
    align-items: start;
}

.article {
    min-width: 0;
}

/* ---------- Article header ---------- */
.article-breadcrumb {
    margin: 0;
    font-size: 0.78rem;
    color: var(--caption-gray);
    letter-spacing: 0.02em;
    text-transform: uppercase;
}

.article-title {
    font-family: var(--serif);
    font-weight: 700;
    font-size: clamp(1.5rem, 3vw, 2.2rem);
    line-height: 1.2;
    margin: 6px 0 8px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--border-gray);
    color: var(--wiki-text);
    letter-spacing: -0.005em;
}

.article-subtitle {
    margin: 0 0 14px;
    color: var(--wiki-text);
    font-size: 1.02rem;
    line-height: 1.55;
    max-width: 60ch;
}

.article-meta {
    margin: 0 0 28px;
    font-family: var(--mono);
    font-size: 0.78rem;
    color: var(--caption-gray);
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    align-items: center;
}

.article-meta .dot {
    opacity: 0.5;
}

/* ---------- Table of contents ---------- */
.toc {
    border: 1px solid var(--border-gray);
    background: var(--infobox-fill);
    padding: 12px 16px;
    margin: 0 0 1.8rem;
    border-radius: 2px;
    max-width: 28rem;
}

.toc-header {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    margin-bottom: 8px;
}

.toc-title {
    font-family: var(--serif);
    font-weight: 700;
    font-size: 1rem;
}

.toc-toggle {
    background: none;
    border: 0;
    color: var(--wiki-blue);
    font-family: var(--sans);
    font-size: 0.82rem;
    cursor: pointer;
    padding: 0;
}

.toc-toggle:hover {
    text-decoration: underline;
}

.toc-list {
    list-style: none;
    padding-left: 0;
    margin: 0;
    counter-reset: none;
    transition: max-height 280ms ease, opacity 200ms ease;
    overflow: hidden;
    max-height: 1200px;
}

.toc.is-collapsed .toc-list {
    max-height: 0;
    opacity: 0;
    margin: 0;
    padding: 0;
}

.toc-list ol {
    list-style: none;
    padding-left: 1.6rem;
    margin: 4px 0;
}

.toc-list li {
    margin: 2px 0;
    line-height: 1.55;
}

.toc-list a {
    display: inline-flex;
    gap: 8px;
    align-items: baseline;
    font-size: 0.92rem;
}

.toc-num {
    font-family: var(--mono);
    font-size: 0.78rem;
    color: var(--caption-gray);
    min-width: 2.2em;
}

.toc-text {
    color: var(--wiki-blue);
}

/* ---------- Article body ---------- */
.article-section {
    margin: 0 0 2.2rem;
}

.article-section h2 {
    font-family: var(--serif);
    font-weight: 700;
    font-size: 1.55rem;
    line-height: 1.25;
    margin: 1.6rem 0 0.6rem;
    padding-bottom: 6px;
    border-bottom: 1px solid var(--border-gray);
    color: var(--wiki-text);
    position: relative;
    scroll-margin-top: 90px;
}

.article-section h2 .anchor-link {
    color: var(--wiki-text);
    text-decoration: none;
    position: relative;
    display: inline-block;
}

.article-section h2 .anchor-link::before {
    content: "#";
    color: var(--wiki-blue);
    position: absolute;
    left: -1.2em;
    top: 0;
    opacity: 0;
    font-family: var(--sans);
    font-weight: 400;
    transition: opacity 150ms ease;
}

.article-section h2:hover .anchor-link::before,
.article-section h2 .anchor-link:focus::before {
    opacity: 1;
}

.article-section h3 {
    font-family: var(--serif);
    font-weight: 700;
    font-size: 1.2rem;
    margin: 1.4rem 0 0.4rem;
    color: var(--wiki-text);
    scroll-margin-top: 90px;
}

.article-section p {
    margin: 0 0 0.9rem;
    max-width: 70ch;
}

.article-section p.equation {
    background: var(--infobox-fill);
    border: 1px solid var(--border-gray);
    border-left: 3px solid var(--wiki-blue);
    padding: 10px 14px;
    border-radius: 2px;
    font-family: var(--mono);
    font-size: 0.95rem;
    margin: 0.4rem 0 1rem;
    max-width: 60ch;
}

.data {
    font-family: var(--mono);
    font-size: 0.92em;
    color: var(--wiki-text);
    letter-spacing: 0;
}

sup.ref a {
    font-family: var(--mono);
    font-size: 0.72em;
    color: var(--wiki-blue);
    padding: 0 1px;
    text-decoration: none;
}

sup.ref a:hover {
    text-decoration: underline;
}

/* ---------- Data table ---------- */
.data-table {
    width: 100%;
    border-collapse: collapse;
    margin: 0.8rem 0 1.4rem;
    border: 1px solid var(--border-gray);
    background: var(--wiki-white);
    font-size: 0.92rem;
}

.data-table caption {
    text-align: left;
    font-family: var(--sans);
    font-size: 0.82rem;
    color: var(--caption-gray);
    padding: 0 0 6px;
    caption-side: top;
}

.data-table th,
.data-table td {
    border: 1px solid var(--border-gray);
    padding: 8px 12px;
    text-align: left;
    vertical-align: top;
}

.data-table thead th {
    background: var(--row-alt);
    font-family: var(--sans);
    font-weight: 700;
    color: var(--wiki-text);
}

.data-table tbody tr:nth-child(odd) {
    background: var(--wiki-white);
}

.data-table tbody tr:nth-child(even) {
    background: var(--infobox-fill);
}

.data-table tbody tr:hover {
    background: var(--row-alt);
}

/* ---------- See also / external links ---------- */
.see-also-list,
.external-list {
    column-count: 2;
    column-gap: 32px;
    list-style: square;
    padding-left: 1.2rem;
    margin: 0;
}

.see-also-list li,
.external-list li {
    margin-bottom: 4px;
    break-inside: avoid;
}

/* ---------- References ---------- */
.reference-list {
    list-style: none;
    padding-left: 0;
    margin: 0;
    font-size: 0.88rem;
    line-height: 1.7;
    columns: 2;
    column-gap: 32px;
}

.reference-list li {
    break-inside: avoid;
    margin: 0 0 8px;
    padding-left: 2.4em;
    text-indent: -2.4em;
    color: var(--wiki-text);
}

.ref-num {
    font-family: var(--mono);
    color: var(--wiki-blue);
    margin-right: 6px;
}

.reference-list li:target {
    background: rgba(51, 102, 204, 0.08);
    transition: background 1500ms ease;
}

/* ---------- Infobox ---------- */
.infobox {
    position: sticky;
    top: 90px;
    align-self: start;
    border: 1px solid var(--border-gray);
    background: var(--infobox-fill);
    border-radius: 2px;
    padding: 0;
    font-size: 0.88rem;
    line-height: 1.5;
    overflow: hidden;
}

.infobox-figure {
    background: var(--wiki-white);
    border-bottom: 1px solid var(--border-gray);
    padding: 14px;
}

.infobox-svg {
    width: 100%;
    height: auto;
    display: block;
}

.infobox-caption {
    margin: 8px 0 0;
    font-family: var(--sans);
    font-size: 0.78rem;
    color: var(--caption-gray);
    text-align: center;
    line-height: 1.5;
}

.infobox-table {
    display: flex;
    flex-direction: column;
}

.infobox-row {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 0;
    border-top: 1px solid var(--border-gray);
}

.infobox-row:first-child {
    border-top: 0;
}

.infobox-row.infobox-header {
    grid-template-columns: 1fr;
    background: var(--row-alt);
    padding: 8px 12px;
    font-family: var(--serif);
    font-weight: 700;
    font-size: 1rem;
    text-align: center;
    color: var(--wiki-text);
}

.infobox-row:nth-child(odd):not(.infobox-header) {
    background: var(--wiki-white);
}

.infobox-row:nth-child(even):not(.infobox-header) {
    background: var(--infobox-fill);
}

.infobox-key,
.infobox-val {
    padding: 7px 12px;
}

.infobox-key {
    font-weight: 700;
    color: var(--wiki-text);
    border-right: 1px solid var(--border-gray);
}

.infobox-val {
    color: var(--wiki-text);
}

.infobox-val.data {
    font-family: var(--mono);
    font-size: 0.82rem;
    line-height: 1.6;
}

.status-pending {
    display: inline-block;
    color: var(--wiki-text);
}

.status-pending::before {
    content: "";
    display: inline-block;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--caption-gray);
    margin-right: 6px;
    vertical-align: middle;
    animation: pulse 2400ms ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 0.4; transform: scale(1); }
    50% { opacity: 1; transform: scale(1.15); }
}

.infobox-tools {
    border-top: 1px solid var(--border-gray);
    background: var(--wiki-white);
    padding: 12px 16px;
}

.tools-title {
    font-family: var(--serif);
    font-size: 0.92rem;
    font-weight: 700;
    margin: 0 0 6px;
    color: var(--wiki-text);
}

.tools-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 3px;
}

.tools-list a {
    font-size: 0.85rem;
    color: var(--wiki-blue);
}

/* ---------- Footer ---------- */
.site-footer {
    border-top: 1px solid var(--border-gray);
    background: var(--infobox-fill);
    margin-top: 32px;
}

.footer-inner {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-meta {
    margin: 0;
    font-size: 0.82rem;
    color: var(--caption-gray);
    line-height: 1.6;
}

.footer-links {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-wrap: wrap;
    gap: 18px;
    font-size: 0.85rem;
}

.footer-links a {
    color: var(--wiki-blue);
}

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
    .page-grid {
        grid-template-columns: 1fr;
    }

    .infobox {
        position: static;
        max-width: 100%;
    }

    .site-header-inner {
        grid-template-columns: 1fr auto;
        grid-template-areas:
            "logo search"
            "nav  nav";
        row-gap: 12px;
    }

    .site-logo { grid-area: logo; }
    .site-search { grid-area: search; }
    .site-nav {
        grid-area: nav;
        justify-self: start;
        flex-wrap: wrap;
    }

    .reference-list,
    .see-also-list,
    .external-list {
        columns: 1;
        column-count: 1;
    }
}

@media (max-width: 560px) {
    .site-search input { width: 140px; }
    .article-section h2 .anchor-link::before {
        display: none;
    }
}