/* SupplyChain.wiki - documentation clean slate */

:root {
    --c-white: #ffffff;
    --c-surface: #f5f5f5;
    --c-text: #222222;
    --c-link: #1a73e8;
    --c-link-deep: #1559b8;
    --c-border: #dddddd;
    --c-border-soft: #e5e5e5;
    --c-def-bg: #e8f4fd;
    --c-def-border: #2196f3;
    --c-muted: #5b6470;
    --c-muted-2: #7a838d;

    --font-display: 'Inter', system-ui, sans-serif;
    --font-body: 'Open Sans', system-ui, sans-serif;
    --font-code: 'Fira Mono', ui-monospace, Menlo, monospace;
}

* { box-sizing: border-box; }

html, body {
    margin: 0;
    padding: 0;
    background: var(--c-white);
    color: var(--c-text);
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
}

a {
    color: var(--c-link);
    text-decoration: none;
    border-bottom: 1px dotted transparent;
    transition: border-color 0.15s, color 0.15s;
}
a:hover { border-bottom-color: var(--c-link); }

/* ============================================================
   Header
   ============================================================ */
.site-header {
    border-bottom: 1px solid var(--c-border);
    background: var(--c-white);
    position: sticky;
    top: 0;
    z-index: 50;
}
.header-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0.85rem 1.25rem;
    display: grid;
    grid-template-columns: auto 1fr auto;
    align-items: center;
    gap: 2rem;
}
.brand {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    color: var(--c-text);
    font-family: var(--font-display);
    font-weight: 700;
    border-bottom: none;
}
.brand:hover { border-bottom: none; color: var(--c-text); }
.brand-mark {
    width: 30px;
    height: 30px;
    background: var(--c-link);
    color: var(--c-white);
    border-radius: 4px;
    display: grid;
    place-items: center;
    font-size: 0.85rem;
    letter-spacing: 0.5px;
}
.brand-name {
    font-size: 1.1rem;
    letter-spacing: -0.01em;
}
.brand-dot { color: var(--c-link); }

.primary-nav {
    display: flex;
    gap: 1.6rem;
    justify-content: center;
}
.nav-link {
    color: var(--c-text);
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 0.92rem;
    border-bottom: none;
    padding: 0.25rem 0;
    border-bottom: 2px solid transparent;
}
.nav-link:hover {
    color: var(--c-link);
    border-bottom-color: var(--c-link);
}

.search-form {
    display: flex;
    gap: 0;
    border: 1px solid var(--c-border);
    border-radius: 4px;
    overflow: hidden;
    background: var(--c-white);
}
.search-input {
    border: 0;
    outline: 0;
    padding: 0.5rem 0.75rem;
    font-family: var(--font-body);
    font-size: 0.9rem;
    width: 240px;
    background: transparent;
    color: var(--c-text);
}
.search-btn {
    border: 0;
    background: var(--c-link);
    color: var(--c-white);
    padding: 0.5rem 0.95rem;
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 0.85rem;
    cursor: pointer;
}
.search-btn:hover { background: var(--c-link-deep); }

/* ============================================================
   Breadcrumbs
   ============================================================ */
.breadcrumbs {
    background: var(--c-surface);
    border-bottom: 1px solid var(--c-border);
}
.breadcrumb-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0.55rem 1.25rem;
    font-size: 0.85rem;
    color: var(--c-muted);
    font-family: var(--font-body);
}
.breadcrumb-inner a {
    color: var(--c-link);
}
.breadcrumb-inner .sep {
    margin: 0 0.45rem;
    color: var(--c-muted-2);
}
.breadcrumb-inner .current {
    color: var(--c-text);
    font-weight: 600;
}

/* ============================================================
   Wiki three-column grid
   ============================================================ */
.wiki-grid {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem 1.25rem 4rem;
    display: grid;
    grid-template-columns: 200px 1fr 240px;
    gap: 2.25rem;
    align-items: start;
}

/* ----- TOC sidebar (left) ----- */
.toc-sidebar {
    position: sticky;
    top: 80px;
    background: var(--c-surface);
    border: 1px solid var(--c-border);
    border-radius: 6px;
    padding: 1rem 1rem 1.25rem;
    font-size: 0.88rem;
}
.toc-header {
    font-family: var(--font-display);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    font-size: 0.72rem;
    color: var(--c-muted);
    padding-bottom: 0.55rem;
    border-bottom: 1px solid var(--c-border);
    margin-bottom: 0.75rem;
}
.toc-list,
.toc-list ol {
    list-style: decimal;
    padding-left: 1.25rem;
    margin: 0;
}
.toc-list ol {
    padding-left: 1.1rem;
    margin-top: 0.25rem;
    margin-bottom: 0.4rem;
    list-style-type: lower-alpha;
}
.toc-list li {
    margin: 0.3rem 0;
    line-height: 1.4;
}
.toc-list a {
    color: var(--c-text);
    border-bottom: none;
    display: inline-block;
    padding: 1px 0;
}
.toc-list a:hover { color: var(--c-link); }
.toc-list a.toc-active {
    color: var(--c-link);
    font-weight: 700;
}

.toc-meta {
    margin-top: 1.1rem;
    padding-top: 0.85rem;
    border-top: 1px solid var(--c-border);
    font-size: 0.78rem;
    color: var(--c-muted);
}
.toc-meta-row {
    display: flex;
    justify-content: space-between;
    padding: 0.2rem 0;
}
.toc-meta-row strong {
    color: var(--c-text);
    font-family: var(--font-display);
    font-weight: 600;
}

/* ----- Article body (center) ----- */
.article-body {
    min-width: 0;
    max-width: 760px;
}
.article-meta-bar {
    display: flex;
    flex-wrap: wrap;
    gap: 0.85rem;
    align-items: center;
    font-size: 0.82rem;
    color: var(--c-muted);
    padding-bottom: 0.85rem;
    border-bottom: 1px solid var(--c-border);
    margin-bottom: 1.25rem;
}
.badge {
    display: inline-block;
    padding: 0.18rem 0.6rem;
    border-radius: 3px;
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 0.72rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}
.badge-status {
    background: var(--c-def-bg);
    color: var(--c-link-deep);
    border: 1px solid var(--c-def-border);
}
.article-meta-item::before {
    content: "·";
    margin-right: 0.85rem;
    color: var(--c-border);
}
.article-meta-item:first-of-type::before { content: ""; margin: 0; }

.article-title {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: clamp(1.75rem, 3vw, 2.35rem);
    line-height: 1.18;
    margin: 0 0 0.85rem;
    letter-spacing: -0.015em;
    border-bottom: 2px solid var(--c-text);
    padding-bottom: 0.55rem;
}
.article-summary {
    font-size: 1.02rem;
    line-height: 1.75;
    margin: 0 0 1.5rem;
    color: var(--c-text);
}

/* Infobox */
.infobox {
    float: right;
    width: 260px;
    margin: 0 0 1.25rem 1.5rem;
    background: var(--c-surface);
    border: 1px solid var(--c-border);
    border-radius: 6px;
    padding: 0.95rem 1rem 1rem;
    font-size: 0.85rem;
}
.infobox-header {
    font-family: var(--font-display);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    font-size: 0.72rem;
    color: var(--c-muted);
    padding-bottom: 0.55rem;
    border-bottom: 1px solid var(--c-border);
    margin-bottom: 0.6rem;
}
.infobox-list {
    margin: 0;
    display: grid;
    grid-template-columns: 90px 1fr;
    gap: 0.35rem 0.65rem;
}
.infobox-list dt {
    font-family: var(--font-display);
    font-weight: 600;
    color: var(--c-muted);
    font-size: 0.78rem;
    line-height: 1.4;
}
.infobox-list dd {
    margin: 0;
    color: var(--c-text);
    line-height: 1.4;
}

/* Sections / headings with anchor permalinks */
.article-section {
    margin: 2rem 0 0;
    scroll-margin-top: 80px;
}
.article-section h2,
.article-section h3 {
    font-family: var(--font-display);
    color: var(--c-text);
    position: relative;
    display: flex;
    align-items: baseline;
    gap: 0.5rem;
}
.article-section h2 {
    font-size: clamp(1.25rem, 2vw, 1.55rem);
    font-weight: 700;
    margin: 1.6rem 0 0.85rem;
    padding-bottom: 0.4rem;
    border-bottom: 1px solid var(--c-border);
    letter-spacing: -0.01em;
}
.article-section h3 {
    font-size: 1.1rem;
    font-weight: 600;
    margin: 1.4rem 0 0.65rem;
    scroll-margin-top: 80px;
}

.anchor-link {
    color: var(--c-link);
    font-family: var(--font-code);
    font-weight: 400;
    cursor: pointer;
    user-select: none;
    opacity: 0;
    transition: opacity 0.15s;
    margin-left: -1.25rem;
    width: 1.25rem;
    text-align: left;
    flex-shrink: 0;
}
.article-section h2:hover .anchor-link,
.article-section h3:hover .anchor-link,
.anchor-link.copied {
    opacity: 1;
}
.anchor-link.copied { color: #2e8b57; }

.suggest-edit {
    margin-left: auto;
    font-family: var(--font-body);
    font-size: 0.72rem;
    font-weight: 400;
    color: var(--c-muted);
    text-transform: lowercase;
    letter-spacing: 0.02em;
    border-bottom: 1px dotted var(--c-border);
    align-self: center;
}
.suggest-edit:hover {
    color: var(--c-link);
    border-bottom-color: var(--c-link);
}

/* Article paragraphs */
.article-section p {
    margin: 0.7rem 0 1rem;
}

/* Wiki-style internal links */
.wiki-link {
    color: var(--c-link);
    border-bottom: 1px solid rgba(26, 115, 232, 0.18);
}
.wiki-link:hover {
    color: var(--c-link-deep);
    border-bottom-color: var(--c-link);
    background: var(--c-def-bg);
}

/* Definition callout */
.definition-box {
    background: var(--c-def-bg);
    border-left: 4px solid var(--c-def-border);
    padding: 1rem 1.15rem;
    border-radius: 0 4px 4px 0;
    margin: 1.25rem 0;
    font-size: 0.96rem;
}
.definition-box p { margin: 0; }
.definition-label {
    font-family: var(--font-display);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    font-size: 0.7rem;
    color: var(--c-link-deep);
    margin-bottom: 0.4rem;
}

/* Lists */
.bulleted-list {
    padding-left: 1.4rem;
    margin: 0.85rem 0 1.1rem;
}
.bulleted-list li {
    margin: 0.35rem 0;
    line-height: 1.7;
}

/* Tables */
.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.92rem;
    margin: 1rem 0 1.25rem;
    background: var(--c-white);
    border: 1px solid var(--c-border);
    border-radius: 4px;
    overflow: hidden;
}
.data-table th,
.data-table td {
    padding: 0.65rem 0.85rem;
    text-align: left;
    border-bottom: 1px solid var(--c-border-soft);
}
.data-table thead th {
    background: var(--c-surface);
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 0.82rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--c-muted);
    border-bottom: 1px solid var(--c-border);
}
.data-table tbody tr:last-child td { border-bottom: none; }
.data-table tbody tr:hover { background: var(--c-def-bg); }

/* Code */
.inline-code {
    font-family: var(--font-code);
    font-size: 0.85rem;
    background: var(--c-surface);
    border: 1px solid var(--c-border);
    padding: 0.05rem 0.35rem;
    border-radius: 3px;
    color: var(--c-text);
}
.code-block {
    background: var(--c-surface);
    border: 1px solid var(--c-border);
    border-left: 4px solid var(--c-def-border);
    border-radius: 4px;
    padding: 0.85rem 1rem;
    overflow-x: auto;
    margin: 1rem 0 1.25rem;
}
.code-block code {
    font-family: var(--font-code);
    font-size: 0.85rem;
    color: var(--c-text);
    line-height: 1.6;
    white-space: pre;
}

/* Reference list */
.reference-list {
    padding-left: 1.4rem;
    font-size: 0.9rem;
    line-height: 1.65;
    color: var(--c-text);
}
.reference-list li { margin: 0.4rem 0; }

/* Article footer */
.article-footer {
    margin-top: 2.25rem;
    padding-top: 1rem;
    border-top: 1px solid var(--c-border);
    font-size: 0.82rem;
    color: var(--c-muted);
}
.article-footer-inner {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 0.75rem;
}

/* ----- Related sidebar (right) ----- */
.related-sidebar {
    position: sticky;
    top: 80px;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    font-size: 0.88rem;
}
.related-block {
    background: var(--c-surface);
    border: 1px solid var(--c-border);
    border-radius: 6px;
    padding: 0.95rem 1rem 1.05rem;
}
.related-header {
    font-family: var(--font-display);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    font-size: 0.72rem;
    color: var(--c-muted);
    padding-bottom: 0.55rem;
    border-bottom: 1px solid var(--c-border);
    margin-bottom: 0.6rem;
}
.related-list {
    list-style: none;
    padding: 0;
    margin: 0;
}
.related-list li {
    padding: 0.18rem 0;
    line-height: 1.45;
}
.related-list a {
    color: var(--c-link);
    border-bottom: 1px solid transparent;
}
.related-list a:hover {
    border-bottom-color: var(--c-link);
}

.contribute-block .contribute-text {
    font-size: 0.84rem;
    color: var(--c-muted);
    line-height: 1.55;
    margin: 0 0 0.6rem;
}
.contribute-btn {
    display: block;
    width: 100%;
    text-align: center;
    background: var(--c-link);
    color: var(--c-white);
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 0.85rem;
    padding: 0.5rem 0.85rem;
    border-radius: 4px;
    border-bottom: none;
    margin-bottom: 0.35rem;
}
.contribute-btn:hover {
    background: var(--c-link-deep);
    border-bottom: none;
}
.contribute-link {
    display: block;
    font-size: 0.82rem;
    padding: 0.18rem 0;
    color: var(--c-link);
}

.stat-row {
    display: flex;
    justify-content: space-between;
    padding: 0.18rem 0;
    font-size: 0.82rem;
    color: var(--c-muted);
}
.stat-row strong {
    color: var(--c-text);
    font-family: var(--font-code);
    font-weight: 700;
}

/* ============================================================
   Footer
   ============================================================ */
.site-footer {
    background: var(--c-surface);
    border-top: 1px solid var(--c-border);
    margin-top: 2rem;
    padding: 2.25rem 0 1.25rem;
}
.footer-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.25rem;
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 2rem;
}
.footer-col {
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
}
.footer-title {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 0.82rem;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--c-text);
    margin-bottom: 0.45rem;
}
.footer-col a {
    color: var(--c-link);
    font-size: 0.88rem;
    padding: 0.1rem 0;
    border-bottom: none;
}
.footer-col a:hover {
    text-decoration: underline;
    border-bottom: none;
}
.footer-text {
    color: var(--c-muted);
    font-size: 0.88rem;
    line-height: 1.6;
    margin: 0;
}
.footer-base {
    max-width: 1200px;
    margin: 1.5rem auto 0;
    padding: 1rem 1.25rem 0;
    border-top: 1px solid var(--c-border);
    font-size: 0.8rem;
    color: var(--c-muted);
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 0.5rem;
}

/* ============================================================
   Anchor toast (permalink copied feedback)
   ============================================================ */
.anchor-toast {
    position: fixed;
    bottom: 1.5rem;
    left: 50%;
    transform: translateX(-50%) translateY(20px);
    background: var(--c-text);
    color: var(--c-white);
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 0.85rem;
    padding: 0.55rem 1rem;
    border-radius: 4px;
    box-shadow: 0 4px 14px rgba(0,0,0,0.18);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.18s, transform 0.18s;
    z-index: 100;
}
.anchor-toast.visible {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

/* ============================================================
   Responsive
   ============================================================ */
@media (max-width: 1100px) {
    .wiki-grid {
        grid-template-columns: 180px 1fr;
        gap: 1.75rem;
    }
    .related-sidebar {
        grid-column: 1 / -1;
        position: static;
        flex-direction: row;
        flex-wrap: wrap;
    }
    .related-block { flex: 1 1 220px; }
    .footer-inner { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 760px) {
    .header-inner {
        grid-template-columns: 1fr auto;
        gap: 0.75rem;
    }
    .primary-nav { display: none; }
    .search-input { width: 160px; }
    .wiki-grid {
        grid-template-columns: 1fr;
        gap: 1.25rem;
    }
    .toc-sidebar {
        position: static;
        order: -1;
    }
    .infobox {
        float: none;
        width: 100%;
        margin: 0 0 1.25rem;
    }
    .related-sidebar { flex-direction: column; }
    .footer-inner { grid-template-columns: 1fr; }
    .anchor-link {
        margin-left: 0;
        width: auto;
        opacity: 1;
    }
}

/* Reduced motion: design says no animations to disable, but be explicit */
@media (prefers-reduced-motion: reduce) {
    * { transition: none !important; }
}