/* ─── Reset ──────────────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

/* ─── Tokens ─────────────────────────────────────────────────────────────── */
:root {
  --bg:          #fafaf8;
  --bg-code:     #f0f0ec;
  --bg-tag:      #eeeee9;
  --text:        #1a1a1a;
  --text-muted:  #666660;
  --link:         #0b7263;
  --link-visited: #084f46;
  --border:       #d8d8d2;
  --accent:       #5ce3c4;
  --accent-dim:   #17a085;
  --accent-muted: #92ecd7;
  --tag-text:     #444440;
  --broken:      #cc3333;

  --font-body: Georgia, 'Times New Roman', serif;
  --font-ui:   system-ui, -apple-system, sans-serif;
  --font-mono: 'Menlo', 'Consolas', 'Monaco', monospace;

  --width-content: 70ch;
  --sidebar-width: 240px;
  --line-height: 1.75;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg:          #2a2a28;
    --bg-code:     #353532;
    --bg-tag:      #3a3a37;
    --text:        #e8e8e4;
    --text-muted:  #999994;
    --link:         #5ce3c4;
    --link-visited: #3ccbb5;
    --border:       #4a4a46;
    --accent:       #5ce3c4;
    --accent-dim:   #2cb5a0;
    --accent-muted: #86e9d6;
    --tag-text:    #b8b8b2;
    --broken:      #ff6b6b;
  }
}

[data-theme="dark"] {
  --bg:          #2a2a28;
  --bg-code:     #353532;
  --bg-tag:      #3a3a37;
  --text:        #e8e8e4;
  --text-muted:  #999994;
  --link:         #5ce3c4;
  --link-visited: #3ccbb5;
  --border:       #4a4a46;
  --accent:       #5ce3c4;
  --accent-dim:   #2cb5a0;
  --accent-muted: #86e9d6;
  --tag-text:    #b8b8b2;
  --broken:      #ff6b6b;
}

/* ─── Focus ─────────────────────────────────────────────────────────────── */
:focus-visible {
  outline: 2px solid var(--link);
  outline-offset: 2px;
  border-radius: 2px;
}

/* ─── Skip link ──────────────────────────────────────────────────────────── */
.skip-link {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
}
.skip-link:focus {
  clip: auto;
  clip-path: none;
  width: auto;
  height: auto;
  overflow: visible;
  white-space: normal;
  position: fixed;
  top: 0.75rem;
  left: 1rem;
  z-index: 9999;
  padding: 0.5rem 1rem;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-ui);
  font-size: 0.9rem;
  font-weight: 600;
  text-decoration: none;
  border: 2px solid var(--link);
  border-radius: 4px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.15);
}

/* ─── Base ───────────────────────────────────────────────────────────────── */
html {
  font-size: 18px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--text);
  line-height: var(--line-height);
  padding: 0 1rem;
}

/* ─── Layout ─────────────────────────────────────────────────────────────── */
.site-header,
.layout,
.site-footer {
  max-width: calc(var(--sidebar-width) + 3rem + var(--width-content));
  margin-left: auto;
  margin-right: auto;
}

.site-header {
  padding: 1.5rem 1rem 1rem;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
}

.header-controls {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-shrink: 0;
}

.search-toggle,
.theme-toggle {
  font-family: var(--font-ui);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--text-muted);
  background: none;
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 0.2em 0.6em;
  cursor: pointer;
  line-height: 1.5;
}
.search-toggle:hover,
.theme-toggle:hover {
  color: var(--text);
  border-color: var(--text-muted);
}

/* ─── Search button + dialog ─────────────────────────────────────────────── */
.search-close {
  position: absolute;
  top: 0.6rem;
  right: 0.6rem;
  background: none;
  border: none;
  font-size: 1.1rem;
  line-height: 1;
  color: var(--text-muted);
  cursor: pointer;
  padding: 0.25rem 0.4rem;
  border-radius: 3px;
}
.search-close:hover { color: var(--text); }

.search-dialog {
  position: fixed;
  inset: 0;
  margin: auto;
  height: fit-content;
  width: min(620px, 90vw);
  max-height: 80vh;
  padding: 1.25rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg);
  color: var(--text);
  box-shadow: 0 20px 60px rgba(0,0,0,0.25);
  overflow-y: auto;
}
.search-dialog::backdrop {
  background: rgba(0,0,0,0.35);
  backdrop-filter: blur(3px);
}

/* Map Pagefind UI tokens to our design tokens */
#search {
  --pagefind-ui-scale: 0.9;
  --pagefind-ui-primary: var(--link);
  --pagefind-ui-text: var(--text);
  --pagefind-ui-background: var(--bg);
  --pagefind-ui-border: var(--border);
  --pagefind-ui-tag: var(--bg-tag);
  --pagefind-ui-font: var(--font-ui);
}

.site-title {
  font-family: var(--font-ui);
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--text-muted);
  text-decoration: none;
}
.site-title:hover { color: var(--accent); }

.layout {
  display: flex;
  align-items: flex-start;
  gap: 0;
}

main {
  flex: 1;
  min-width: 0;
  max-width: 100%;
  padding: 2.5rem 1rem 4rem 3rem;
}

.site-footer {
  padding: 1.5rem 1rem;
  border-top: 1px solid var(--border);
  font-family: var(--font-ui);
  font-size: 0.78rem;
  color: var(--text-muted);
}
.site-footer a { color: var(--text-muted); }
.site-footer a:hover { color: var(--text); }

/* ─── Sidebar ────────────────────────────────────────────────────────────── */

/* sidebar-wrapper (<details>) is the flex item; sidebar (<nav>) scrolls inside it */
.sidebar-wrapper {
  flex-shrink: 0;
  width: var(--sidebar-width);
  border-right: 1px solid var(--border);
}

/* Desktop: hide mobile-only elements */
@media (min-width: 721px) {
  .sidebar-toggle { display: none; }
  .jump-to-content { display: none; }
}

.sidebar {
  padding: 2rem 1rem 4rem;
}

.sidebar details {
  margin-bottom: 0.15rem;
}

.sidebar details summary {
  list-style: none;
  cursor: pointer;
  user-select: none;
  display: flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.3rem 0.4rem;
  border-radius: 4px;
  font-family: var(--font-ui);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--text-muted);
}
.sidebar details summary::before {
  content: "›";
  display: inline-block;
  width: 0.7rem;
  transition: transform 0.12s ease;
  transform-origin: center 45%;
}
.sidebar details[open] > summary::before { transform: rotate(90deg); color: var(--accent); }
.sidebar details summary:hover { color: var(--text); }

.sidebar details ul {
  list-style: none;
  margin: 0.1rem 0 0.5rem 0.55rem;
  padding: 0;
  border-left: 1px solid var(--border);
}

.sidebar details li { margin: 0; }

.sidebar details a {
  display: block;
  padding: 0.2rem 0.6rem;
  font-family: var(--font-ui);
  font-size: 0.72rem;
  line-height: 1.3;
  color: var(--text-muted);
  text-decoration: none;
  border-radius: 3px;
}
.sidebar details a:hover { color: var(--text); }
.sidebar details a[aria-current="page"] {
  color: var(--link);
  font-weight: 600;
}

.section-index-link {
  font-style: italic;
  border-bottom: 1px solid var(--border);
  margin-bottom: 0.2rem;
  padding-bottom: 0.3rem !important;
}

.nav-top-links {
  list-style: none;
  margin: 0 0 0.6rem;
  padding: 0 0 0.6rem;
  border-bottom: 1px solid var(--border);
}

.nav-top-links a {
  display: block;
  padding: 0.2rem 0.4rem;
  font-family: var(--font-ui);
  font-size: 0.72rem;
  color: var(--text-muted);
  text-decoration: none;
  border-radius: 3px;
}
.nav-top-links a:hover { color: var(--text); }
.nav-top-links a[aria-current="page"] { color: var(--link); font-weight: 600; }

.breadcrumb {
  font-family: var(--font-ui);
  font-size: 0.8rem;
  color: var(--text-muted);
}
.breadcrumb a { color: var(--text-muted); }
.breadcrumb a:hover { color: var(--link); }
.breadcrumb .sep { margin: 0 0.35em; }

/* ─── Page header ────────────────────────────────────────────────────────── */
.page-header {
  margin-bottom: 2.5rem;
}

.page-header h1 {
  font-size: 2rem;
  font-weight: normal;
  letter-spacing: -0.02em;
  line-height: 1.25;
  margin-bottom: 0.75rem;
}

.page-meta {
  font-family: var(--font-ui);
  font-size: 0.8rem;
  color: var(--text-muted);
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.25rem;
  align-items: center;
  margin-bottom: 0.85rem;
}

.page-type-badge {
  background: var(--bg-tag);
  color: var(--tag-text);
  border-radius: 3px;
  padding: 0.1em 0.45em;
  font-size: 0.72rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  font-weight: 600;
}

.page-updated { color: var(--text-muted); }

a.page-type-badge {
  text-decoration: none;
  cursor: pointer;
}
a.page-type-badge:hover {
  background: var(--border);
  color: var(--text);
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  list-style: none;
}

.tag-chip {
  display: inline-block;
  background: var(--bg-tag);
  color: var(--tag-text);
  border-radius: 999px;
  padding: 0.15em 0.65em;
  font-family: var(--font-ui);
  font-size: 0.75rem;
  text-decoration: none;
  border: 1px solid var(--border);
  transition: background 0.1s;
}
.tag-chip:hover {
  background: var(--border);
  color: var(--text);
}

/* ─── Body typography ────────────────────────────────────────────────────── */
.page-body {
  max-width: 100%;
  overflow-wrap: break-word;
}

.page-body img {
  max-width: 100%;
  height: auto;
}

.page-body h1,
.page-body h2,
.page-body h3,
.page-body h4 {
  font-weight: 600;
  line-height: 1.3;
  margin-top: 2rem;
  margin-bottom: 0.6rem;
}

.page-body h1 { font-size: 1.55rem; letter-spacing: -0.02em; }
.page-body h2 { font-size: 1.25rem; }
.page-body h3 { font-size: 1.05rem; }
.page-body h4 { font-size: 1rem; font-style: italic; font-weight: normal; }

.page-body p { margin-bottom: 1rem; }

.page-body ul,
.page-body ol {
  margin: 0 0 1rem 1.5rem;
}
.page-body li { margin-bottom: 0.25rem; }
.page-body li > ul,
.page-body li > ol { margin-top: 0.25rem; margin-bottom: 0; }

.page-body a            { color: var(--link); }
.page-body a:visited    { color: var(--link-visited); }
.page-body a:hover      { text-decoration: none; }

.page-body hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 2rem 0;
}

/* ─── Code ───────────────────────────────────────────────────────────────── */
.page-body code {
  font-family: var(--font-mono);
  font-size: 0.82em;
  background: var(--bg-code);
  padding: 0.1em 0.3em;
  border-radius: 3px;
}

.page-body pre {
  background: var(--bg-code);
  border: 1px solid var(--border);
  border-radius: 5px;
  padding: 1rem 1.25rem;
  overflow-x: auto;
  margin-bottom: 1.25rem;
  line-height: 1.5;
}

.page-body pre code {
  background: none;
  padding: 0;
  font-size: 0.8rem;
}

/* ─── Blockquotes / callouts ─────────────────────────────────────────────── */
.page-body blockquote {
  border-left: 3px solid var(--accent);
  padding: 0.4rem 0 0.4rem 1.1rem;
  margin: 1.25rem 0;
  color: var(--text-muted);
  font-style: italic;
}

.page-body blockquote strong {
  font-style: normal;
  color: var(--text);
}

/* ─── Tables ─────────────────────────────────────────────────────────────── */
.table-wrapper {
  overflow-x: auto;
  margin-bottom: 1.25rem;
}

.page-body table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--font-ui);
  font-size: 0.85rem;
}

.page-body th {
  text-align: left;
  font-weight: 600;
  padding: 0.45rem 0.75rem;
  border-bottom: 2px solid var(--border);
  background: var(--bg-tag);
}

.page-body td {
  padding: 0.4rem 0.75rem;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}

.page-body tr:last-child td { border-bottom: none; }

/* ─── Source citations ───────────────────────────────────────────────────── */
.page-body a[href*="sources/"] {
  color: var(--text-muted);
  font-style: italic;
  font-size: 0.92em;
}
.page-body a[href*="sources/"]:hover { color: var(--link); }

/* ─── Backlinks ──────────────────────────────────────────────────────────── */
.backlinks {
  margin-top: 2.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
}
.backlinks h2 {
  font-family: var(--font-ui);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  margin: 0 0 0.75rem;
}
.backlinks ul { list-style: none; padding: 0; margin: 0; }
.backlinks li { margin: 0.3rem 0; font-size: 0.9rem; break-inside: avoid; }
.backlinks a         { color: var(--link); }
.backlinks a:visited { color: var(--link-visited); }
.backlinks a:hover   { text-decoration: none; }

/* Two-column layout for backlinks on wider viewports.
   721px matches the sidebar-toggle breakpoint used elsewhere. */
@media (min-width: 721px) {
  .backlinks ul {
    column-count: 2;
    column-gap: 2rem;
  }
}

/* ─── Table of contents ──────────────────────────────────────────────────── */
.toc {
  margin: 0 0 2rem;
  padding: 0.85rem 1rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--bg-tag);
  font-size: 0.9rem;
}
.toc > summary {
  list-style: none;
  cursor: pointer;
  user-select: none;
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-family: var(--font-ui);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--text-muted);
}
.toc > summary::-webkit-details-marker { display: none; }
.toc > summary::before {
  content: "›";
  display: inline-block;
  width: 0.7rem;
  transition: transform 0.12s ease;
  transform-origin: center 45%;
}
.toc[open] > summary::before { transform: rotate(90deg); color: var(--accent); }
.toc > summary:hover { color: var(--text); }
.toc ol {
  list-style: none;
  padding: 0;
  margin: 0.75rem 0 0.1rem;
}
.toc li {
  margin: 0.2rem 0;
  line-height: 1.3;
  break-inside: avoid;
}
.toc li.toc-sub {
  padding-left: 1.1rem;
  font-size: 0.85rem;
}
.toc a         { color: var(--link); text-decoration: none; }
.toc a:visited { color: var(--link-visited); }
.toc a:hover   { text-decoration: underline; }

/* Two-column TOC on wider viewports, matching the backlinks treatment. */
@media (min-width: 721px) {
  .toc ol {
    column-count: 2;
    column-gap: 2rem;
  }
}

/* ─── Listen bar ─────────────────────────────────────────────────────────── */
.listen-bar {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 2rem;
}
.listen-btn,
.listen-stop {
  font-family: var(--font-ui);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--text-muted);
  background: none;
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 0.2em 0.6em;
  cursor: pointer;
  line-height: 1.5;
}
.listen-btn:hover,
.listen-stop:hover {
  color: var(--text);
  border-color: var(--text-muted);
}
.listen-experimental {
  font-family: var(--font-ui);
  font-size: 0.72rem;
  color: var(--text-muted);
}

/* ─── Broken wikilinks ───────────────────────────────────────────────────── */
.broken-link {
  color: var(--broken);
  text-decoration: underline dotted;
  cursor: not-allowed;
  font-style: italic;
}

/* ─── Tag index page ─────────────────────────────────────────────────────── */
.tag-index-header {
  margin-bottom: 2rem;
}
.tag-index-header h1 { font-size: 1.8rem; font-weight: normal; }
.tag-index-header .tag-count {
  font-family: var(--font-ui);
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 0.4rem;
}

.tag-index-list {
  list-style: none;
}

.tag-index-item {
  padding: 1rem 0;
  border-bottom: 1px solid var(--border);
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 0.25rem 1rem;
  align-items: start;
}
.tag-index-item:first-child { border-top: 1px solid var(--border); }

.tag-index-item a {
  font-size: 1.05rem;
  color: var(--link);
  font-weight: 600;
  text-decoration: none;
}
.tag-index-item a:hover { text-decoration: underline; }

.tag-index-item .summary {
  font-size: 0.88rem;
  color: var(--text-muted);
  font-family: var(--font-ui);
  line-height: 1.4;
  grid-column: 1;
}

.tag-index-item .page-type-badge {
  grid-column: 2;
  grid-row: 1;
  align-self: start;
  white-space: nowrap;
}

/* ─── Responsive ─────────────────────────────────────────────────────────── */
@media (max-width: 720px) {
  html { font-size: 16px; }
  .layout { flex-direction: column; }

  .sidebar-wrapper {
    width: 100%;
    border-right: none;
    border-bottom: 1px solid var(--border);
  }

  .sidebar-toggle {
    list-style: none;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    user-select: none;
    padding: 0.75rem 1rem;
    font-family: var(--font-ui);
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-muted);
  }
  .sidebar-toggle::before {
    content: "›";
    display: inline-block;
    transition: transform 0.12s ease;
  }
  .sidebar-wrapper[open] > .sidebar-toggle::before { transform: rotate(90deg); }

  .sidebar {
    position: static;
    max-height: none;
    overflow-y: visible;
    padding: 0.25rem 0.5rem 1rem;
  }

  .jump-to-content {
    display: block;
    padding: 0.55rem 0.5rem;
    margin-bottom: 0.5rem;
    font-family: var(--font-ui);
    font-size: 0.78rem;
    color: var(--text-muted);
    text-decoration: none;
    border-bottom: 1px solid var(--border);
  }
  .jump-to-content:hover { color: var(--text); }

  main { padding: 2rem 1rem 3rem; }
}

@media (max-width: 480px) {
  html { font-size: 15px; }
  .page-header h1 { font-size: 1.6rem; }
  .tag-index-item { grid-template-columns: 1fr; }
  .tag-index-item .page-type-badge { grid-column: 1; grid-row: auto; }
}