/* PointSav Knowledge — wiki chrome.
 *
 * Wikipedia muscle-memory target: serif body for article content, sans
 * for chrome and headings; same content max-width discipline; same
 * blue-link / purple-visited convention. Mobile-first via single
 * column with viewport scaling. No JS required for read.
 */

:root {
  --serif: Georgia, "Times New Roman", serif;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, sans-serif;
  --mono: "SF Mono", Menlo, Consolas, monospace;
  --bg: #ffffff;
  --bg-chrome: #f8f9fa;
  --bg-aside: #fdf6e3;
  --fg: #202122;
  --fg-muted: #54595d;
  --border: #a2a9b1;
  --link: #3366cc;
  --link-visited: #6b4ba1;
  --link-redlink: #cc0000;
  --max-content-width: 76em;
}

* { box-sizing: border-box; }

html { font-size: 16px; }

body {
  margin: 0;
  font-family: var(--sans);
  font-size: 0.875rem;
  line-height: 1.6;
  color: var(--fg);
  background: var(--bg);
}

/* --- chrome --- */

.site-header {
  border-bottom: 1px solid var(--border);
  background: var(--bg-chrome);
  padding: 0.75rem 1.25rem;
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1rem;
}

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

.site-nav a {
  color: var(--link);
  text-decoration: none;
  margin-left: 1rem;
}

.site-nav a:hover { text-decoration: underline; }

.site-main {
  max-width: var(--max-content-width);
  margin: 0 auto;
  padding: 1.5rem 1.25rem 3rem;
}

.site-footer {
  border-top: 1px solid var(--border);
  background: var(--bg-chrome);
  padding: 1rem 1.25rem;
  color: var(--fg-muted);
  font-size: 0.8125rem;
  margin-top: 3rem;
}

/* --- index --- */

.lede {
  color: var(--fg-muted);
  font-size: 1rem;
  margin-bottom: 1.5rem;
}

.page-list { list-style: none; padding-left: 0; }

.page-list li {
  padding: 0.25rem 0;
  border-bottom: 1px dotted var(--border);
}

.page-list a {
  color: var(--link);
  text-decoration: none;
  font-family: var(--mono);
  font-size: 0.9375rem;
}

.page-list a:hover { text-decoration: underline; }

.empty { color: var(--fg-muted); font-style: italic; }

/* --- article body --- */

article { font-family: var(--serif); font-size: 1rem; line-height: 1.65; }

.page-title {
  font-family: var(--sans);
  font-weight: 400;
  font-size: 2rem;
  border-bottom: 1px solid var(--border);
  padding-bottom: 0.5rem;
  margin-top: 0;
  margin-bottom: 1.25rem;
}

article h1, article h2, article h3, article h4, article h5, article h6 {
  font-family: var(--sans);
  font-weight: 400;
  margin-top: 1.75rem;
  margin-bottom: 0.5rem;
}

article h1 { font-size: 1.75rem; border-bottom: 1px solid var(--border); padding-bottom: 0.25rem; }
article h2 { font-size: 1.5rem; border-bottom: 1px solid var(--border); padding-bottom: 0.25rem; }
article h3 { font-size: 1.25rem; }
article h4 { font-size: 1.0625rem; font-weight: 600; }

article a { color: var(--link); }
article a:visited { color: var(--link-visited); }
article a.wikilink { color: var(--link); }
article a.wikilink-redlink { color: var(--link-redlink); }

article p, article ul, article ol { margin: 0.75em 0; }
article ul, article ol { padding-left: 2em; }
article li { margin: 0.2em 0; }

article code {
  font-family: var(--mono);
  font-size: 0.875em;
  background: var(--bg-chrome);
  padding: 0.1em 0.3em;
  border-radius: 2px;
}

article pre {
  background: var(--bg-chrome);
  border: 1px solid var(--border);
  padding: 0.75rem 1rem;
  overflow-x: auto;
  font-family: var(--mono);
  font-size: 0.875em;
  line-height: 1.45;
  border-radius: 2px;
}

article pre code {
  background: transparent;
  padding: 0;
  border-radius: 0;
}

article blockquote {
  border-left: 3px solid var(--border);
  margin: 1rem 0;
  padding: 0.25rem 1rem;
  color: var(--fg-muted);
}

article table {
  border-collapse: collapse;
  margin: 1rem 0;
  font-size: 0.9375rem;
}

article table th, article table td {
  border: 1px solid var(--border);
  padding: 0.4rem 0.6rem;
  text-align: left;
  vertical-align: top;
}

article table th { background: var(--bg-chrome); font-weight: 600; }

/* --- forward-looking-information notice --- */

.fli-notice {
  background: var(--bg-aside);
  border-left: 3px solid #b58900;
  padding: 0.75rem 1rem;
  margin: 1rem 0 1.5rem;
  font-family: var(--sans);
  font-size: 0.875rem;
}

/* =====================================================================
 * Phase 1.1 — Wikipedia muscle-memory chrome (additive)
 *
 * All rules below are additive over Phase 1. No existing rule is
 * modified or removed. Vector 2022 design contract: every addition
 * is an extension, never a replacement.
 * ===================================================================== */

/* --- Additional CSS variables for Phase 1.1 chrome --- */
:root {
  --toc-width: 14em;
  --toc-bg: #f8f9fa;
  --ivc-band-bg: #f0f4f8;
  --ivc-band-border: #c8d6e5;
  --tab-active-border: #3366cc;
  --tab-hover-bg: #eaecf0;
  --density-btn-bg: #eaecf0;
  --density-btn-active-bg: #3366cc;
  --density-btn-active-fg: #ffffff;
  --hatnote-color: #54595d;
  --cat-bg: #f8f9fa;
}

/* --- Two-column wiki layout: left TOC rail + article main --- */

.wiki-layout {
  display: flex;
  align-items: flex-start;
  max-width: var(--max-content-width);
  margin: 0 auto;
  padding: 0;
  gap: 0;
}

/* --- Left-rail collapsible TOC (Vector 2022 sticky pattern) --- */

.wiki-toc {
  flex: 0 0 var(--toc-width);
  width: var(--toc-width);
  min-width: var(--toc-width);
  position: sticky;
  top: 1rem;
  align-self: flex-start;
  background: var(--toc-bg);
  border: 1px solid var(--border);
  border-radius: 2px;
  margin: 1.25rem 0 1.25rem 1.25rem;
  padding: 0.5rem 0;
  font-family: var(--sans);
  font-size: 0.875rem;
}

.toc-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.25rem 0.75rem;
  gap: 0.5rem;
}

.toc-title {
  font-weight: 700;
  font-size: 0.875rem;
}

.toc-toggle {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--link);
  font-size: 0.8125rem;
  padding: 0;
  text-decoration: underline;
  font-family: inherit;
}

.toc-toggle:hover { color: var(--link-visited); }

.toc-list {
  list-style: none;
  padding: 0.25rem 0;
  margin: 0;
}

.toc-list li {
  padding: 0;
  border: none;
  margin: 0;
}

.toc-list a {
  display: block;
  color: var(--link);
  text-decoration: none;
  padding: 0.15rem 0.75rem;
  line-height: 1.4;
}

.toc-list a:hover { text-decoration: underline; }
.toc-list a:visited { color: var(--link-visited); }

/* Indent sub-headings visually */
.toc-level-2 a { padding-left: 0.75rem; }
.toc-level-3 a { padding-left: 1.5rem; }
.toc-level-4 a { padding-left: 2.25rem; }
.toc-level-5 a { padding-left: 3rem; }
.toc-level-6 a { padding-left: 3.75rem; }

/* When the TOC is collapsed (JS sets aria-expanded=false), hide the list */
.wiki-toc.toc-collapsed .toc-list { display: none; }

/* --- Main article column --- */

.wiki-main {
  flex: 1 1 0%;
  min-width: 0;
  padding: 1.25rem 1.5rem 3rem 1.5rem;
}

/* --- Title row: tabs + title + action tabs --- */

.wiki-title-row {
  display: flex;
  align-items: flex-end;
  gap: 0.5rem;
  border-bottom: 1px solid var(--border);
  margin-bottom: 0.75rem;
  flex-wrap: wrap;
}

/* Article / Talk tabs — top-left (item 1) */
.wiki-page-tabs {
  display: flex;
  align-items: flex-end;
  gap: 0;
  margin-right: auto;
  flex-shrink: 0;
}

/* Read / Edit / View history tabs — top-right (item 2) */
.wiki-action-tabs {
  display: flex;
  align-items: flex-end;
  gap: 0;
  margin-left: auto;
  flex-shrink: 0;
}

.wiki-tab {
  display: inline-block;
  padding: 0.35rem 0.75rem;
  font-family: var(--sans);
  font-size: 0.875rem;
  color: var(--link);
  text-decoration: none;
  border: 1px solid var(--border);
  border-bottom: none;
  border-radius: 2px 2px 0 0;
  background: var(--bg-chrome);
  line-height: 1.4;
  margin-right: 2px;
  cursor: pointer;
}

.wiki-tab:hover { background: var(--tab-hover-bg); text-decoration: none; }

.wiki-tab-active {
  background: var(--bg);
  border-bottom: 2px solid var(--bg);
  color: var(--fg);
  font-weight: 500;
  position: relative;
  z-index: 1;
  margin-bottom: -1px;
}

/* Title block: h1 + tagline + language switcher */
.wiki-title-block {
  flex: 1 1 auto;
  min-width: 0;
}

.wiki-title-inner {
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
  flex-wrap: wrap;
}

/* Override page-title margin when inside the title-row layout */
.wiki-title-block .page-title {
  border-bottom: none;
  margin-bottom: 0.125rem;
  padding-bottom: 0;
}

/* Tagline: "From PointSav Knowledge" (item 9) */
.wiki-tagline {
  font-family: var(--sans);
  font-size: 0.8125rem;
  color: var(--fg-muted);
  margin: 0 0 0.35rem 0;
}

/* Language switcher button(s) next to title (item 14) */
.wiki-lang-switcher {
  display: flex;
  gap: 0.25rem;
  align-items: baseline;
}

.wiki-lang-btn {
  display: inline-block;
  padding: 0.15rem 0.5rem;
  font-family: var(--sans);
  font-size: 0.8125rem;
  color: var(--link);
  text-decoration: none;
  border: 1px solid var(--border);
  border-radius: 2px;
  background: var(--bg-chrome);
}

.wiki-lang-btn:hover { background: var(--tab-hover-bg); text-decoration: none; }

/* --- IVC masthead band (UX-DESIGN.md §4.5) --- */

.wiki-ivc-band {
  background: var(--ivc-band-bg);
  border: 1px solid var(--ivc-band-border);
  border-radius: 2px;
  padding: 0.4rem 0.75rem;
  margin-bottom: 0.75rem;
  font-family: var(--sans);
  font-size: 0.8125rem;
  color: var(--fg-muted);
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.ivc-band-text {
  font-style: italic;
  flex: 1 1 auto;
}

/* --- Reader density toggle (UX-DESIGN.md §4.6) --- */

.wiki-density-toggle {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  flex-shrink: 0;
  flex-wrap: wrap;
}

.density-label {
  font-size: 0.8125rem;
  color: var(--fg-muted);
  white-space: nowrap;
}

.density-btn {
  padding: 0.2rem 0.5rem;
  font-size: 0.75rem;
  font-family: var(--sans);
  background: var(--density-btn-bg);
  border: 1px solid var(--border);
  border-radius: 2px;
  cursor: pointer;
  color: var(--fg);
  line-height: 1.3;
}

.density-btn:hover { background: var(--tab-hover-bg); }

.density-btn-active {
  background: var(--density-btn-active-bg);
  color: var(--density-btn-active-fg);
  border-color: var(--density-btn-active-bg);
}

/* --- Hatnote (item 6): italic, indented, top of article --- */

.wiki-hatnote {
  font-style: italic;
  margin: 0 0 1rem 1.5rem;
  color: var(--fg-muted);
  font-family: var(--sans);
  font-size: 0.9375rem;
}

/* --- Article wrapper inside wiki-main --- */

.wiki-article {
  /* Inherits article styles from Phase 1 */
}

/* --- Per-section [edit] pencils (item 3) --- */

/* The edit pencil is right-floated inside each heading.
 * comrak emits headings as: <h2 id="…"><span class="edit-pencil">…</span>text
 * We float it so the heading text stays on the left.
 */
.edit-pencil {
  float: right;
  font-size: 0.75rem;
  font-weight: 400;
  font-family: var(--sans);
  margin-left: 0.5rem;
  line-height: inherit;
}

.edit-pencil a {
  color: var(--fg-muted);
  text-decoration: none;
}

.edit-pencil a:hover {
  color: var(--link);
  text-decoration: underline;
}

/* --- End-of-article footer block (items 5 + 15) --- */

.wiki-article-footer {
  border-top: 1px solid var(--border);
  margin-top: 2.5rem;
  padding-top: 1rem;
  font-family: var(--sans);
  font-size: 0.875rem;
}

/* Categories (item 15) */
.wiki-categories {
  background: var(--cat-bg);
  border: 1px solid var(--border);
  border-radius: 2px;
  padding: 0.4rem 0.75rem;
  margin-bottom: 0.75rem;
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.cats-label {
  font-weight: 600;
  white-space: nowrap;
}

.cats-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
}

.cats-list li { margin: 0; padding: 0; border: none; }

.cats-list a {
  color: var(--link);
  text-decoration: none;
  font-size: 0.875rem;
}

.cats-list a:visited { color: var(--link-visited); }
.cats-list a:hover { text-decoration: underline; }

.wiki-footer-meta {
  color: var(--fg-muted);
  font-size: 0.8125rem;
  margin-top: 0.75rem;
}

.wiki-license { margin: 0 0 0.25rem; }
.wiki-license a { color: var(--link); }

.wiki-footer-links a {
  color: var(--link);
  text-decoration: none;
}

.wiki-footer-links a:hover { text-decoration: underline; }

/* --- Mobile responsive overrides for Phase 1.1 chrome --- */

@media (max-width: 768px) {
  .wiki-layout {
    flex-direction: column;
  }

  .wiki-toc {
    position: static;
    width: auto;
    min-width: 0;
    flex: none;
    margin: 0.75rem 0.75rem 0;
    order: 2; /* TOC appears below the title row on mobile */
  }

  .wiki-main {
    order: 1;
    padding: 0.75rem;
  }

  .wiki-title-row {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.25rem;
  }

  .wiki-page-tabs,
  .wiki-action-tabs {
    margin: 0;
    flex-wrap: wrap;
  }

  .wiki-ivc-band {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.5rem;
  }
}