:root {
  --bg: #0f1117;
  --sidebar-bg: #13151e;
  --card-bg: #1a1d28;
  --border: #252836;
  --text: #ced3e8;
  --text-dim: #7a84a0;
  --accent: #e8523a;
  --link: #6fa8dc;
  --link-hover: #93c4f5;
  --code-bg: #0d0f18;
  --sidebar-w: 248px;
  --toc-w: 220px;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; scroll-behavior: smooth; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  line-height: 1.75;
  display: flex;
  min-height: 100vh;
}

/* ── Sidebar ── */
#sidebar {
  width: var(--sidebar-w);
  min-height: 100vh;
  background: var(--sidebar-bg);
  border-right: 1px solid var(--border);
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
  flex-shrink: 0;
  scrollbar-width: thin;
  scrollbar-color: var(--border) transparent;
}
#sidebar-header {
  padding: 18px 16px 14px;
  border-bottom: 1px solid var(--border);
}
#sidebar-header a { text-decoration: none; }
#sidebar-header .brand {
  font-size: 0.95rem;
  font-weight: 800;
  letter-spacing: 0.06em;
  color: var(--accent);
  display: block;
}
#sidebar-header .tagline {
  font-size: 0.7rem;
  color: var(--text-dim);
  margin-top: 2px;
  display: block;
  letter-spacing: 0.02em;
}
.nav-group { border-bottom: 1px solid var(--border); }
.nav-group h3 {
  font-size: 0.62rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-dim);
  padding: 12px 16px 5px;
}
.nav-group ul { list-style: none; padding-bottom: 6px; }
.nav-group ul li a {
  display: block;
  padding: 4px 16px 4px 18px;
  font-size: 0.81rem;
  color: var(--text-dim);
  text-decoration: none;
  transition: color .12s, background .12s;
  border-left: 2px solid transparent;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.nav-group ul li a:hover {
  color: var(--text);
  background: rgba(255,255,255,.035);
  border-left-color: var(--accent);
}
.nav-group ul li a.active {
  color: #fff;
  border-left-color: var(--accent);
  background: rgba(232,82,58,.08);
  font-weight: 600;
}

/* ── Main ── */
#main { flex: 1; display: flex; flex-direction: column; min-width: 0; }

#topbar {
  background: var(--sidebar-bg);
  border-bottom: 1px solid var(--border);
  padding: 10px 28px;
  display: flex;
  align-items: center;
  gap: 12px;
  position: sticky;
  top: 0;
  z-index: 100;
}
.breadcrumb { font-size: 0.78rem; color: var(--text-dim); flex: 1; min-width: 0; overflow: hidden; white-space: nowrap; text-overflow: ellipsis; }
.breadcrumb a { color: var(--link); text-decoration: none; }
.breadcrumb a:hover { color: var(--link-hover); }
.breadcrumb .sep { margin: 0 5px; opacity: .4; }

/* ── Search trigger button ── */
#search-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: 7px;
  padding: 6px 12px;
  color: var(--text-dim);
  font-size: 0.8rem;
  cursor: pointer;
  transition: border-color .15s;
  white-space: nowrap;
  flex-shrink: 0;
}
#search-btn:hover { border-color: var(--accent); color: var(--text); }
#search-btn .kbd {
  font-size: 0.68rem;
  background: var(--border);
  border-radius: 3px;
  padding: 1px 5px;
  letter-spacing: .03em;
  color: var(--text-dim);
}

/* ── Search modal ── */
#search-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.65);
  backdrop-filter: blur(4px);
  z-index: 1000;
  align-items: flex-start;
  justify-content: center;
  padding-top: 10vh;
}
#search-overlay.open { display: flex; }
#search-modal {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  width: 100%;
  max-width: 580px;
  box-shadow: 0 24px 64px rgba(0,0,0,.6);
  overflow: hidden;
}
#search-input-wrap {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 18px;
  border-bottom: 1px solid var(--border);
}
#search-input-wrap svg { flex-shrink: 0; opacity: .5; }
#search-input {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  font-size: 1rem;
  color: var(--text);
  caret-color: var(--accent);
}
#search-input::placeholder { color: var(--text-dim); }
#search-esc {
  font-size: 0.7rem;
  color: var(--text-dim);
  background: var(--border);
  border-radius: 4px;
  padding: 2px 7px;
  cursor: pointer;
  flex-shrink: 0;
}
#search-results { max-height: 380px; overflow-y: auto; }
.search-result {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 12px 18px;
  cursor: pointer;
  border-bottom: 1px solid var(--border);
  transition: background .1s;
  text-decoration: none;
  color: inherit;
}
.search-result:last-child { border-bottom: none; }
.search-result:hover, .search-result.focused {
  background: rgba(232,82,58,.08);
}
.search-result .sr-title {
  font-size: 0.92rem;
  font-weight: 600;
  color: #fff;
}
.search-result .sr-title mark {
  background: transparent;
  color: var(--accent);
  font-weight: 700;
}
.search-result .sr-excerpt {
  font-size: 0.78rem;
  color: var(--text-dim);
  overflow: hidden;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
}
.search-result .sr-excerpt mark {
  background: transparent;
  color: var(--link);
}
#search-empty {
  padding: 28px 18px;
  text-align: center;
  color: var(--text-dim);
  font-size: 0.88rem;
}
#search-hint {
  padding: 10px 18px;
  font-size: 0.72rem;
  color: var(--text-dim);
  border-top: 1px solid var(--border);
  display: flex;
  gap: 16px;
}
#search-hint span { display: flex; align-items: center; gap: 4px; }
#search-hint kbd {
  background: var(--border);
  border-radius: 3px;
  padding: 1px 5px;
  font-size: 0.68rem;
}

/* ── Content + TOC layout ── */
#content-wrapper {
  display: flex;
  flex: 1;
  min-width: 0;
}
#content {
  flex: 1;
  padding: 36px 48px 80px;
  max-width: 860px;
  min-width: 0;
}
h1.page-title {
  font-size: 1.85rem;
  font-weight: 800;
  color: #fff;
  margin-bottom: 28px;
  padding-bottom: 14px;
  border-bottom: 2px solid var(--accent);
  letter-spacing: -0.01em;
}

/* ── Page TOC (right panel) ── */
#page-toc {
  width: var(--toc-w);
  flex-shrink: 0;
  padding: 36px 0 0 0;
}
#page-toc-inner {
  position: sticky;
  top: 56px;
  padding: 14px 16px;
  border-left: 1px solid var(--border);
  margin-right: 16px;
}
.toc-label {
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-dim);
  margin-bottom: 10px;
}
#page-toc ul { list-style: none; }
#page-toc ul li { margin: 0; }
#page-toc ul li a {
  display: block;
  padding: 3px 0 3px 8px;
  font-size: 0.78rem;
  color: var(--text-dim);
  text-decoration: none;
  border-left: 2px solid transparent;
  transition: color .12s, border-color .12s;
  line-height: 1.4;
}
#page-toc ul li a:hover { color: var(--text); }
#page-toc ul li a.toc-active {
  color: var(--accent);
  border-left-color: var(--accent);
}
#page-toc ul li.toc-h3 a {
  padding-left: 18px;
  font-size: 0.74rem;
}

/* ── Wiki content ── */
.wiki-content h2 {
  font-size: 1.25rem;
  font-weight: 700;
  color: #e8eaf6;
  margin: 36px 0 10px;
  padding-bottom: 7px;
  border-bottom: 1px solid var(--border);
  scroll-margin-top: 64px;
}
.wiki-content h3 {
  font-size: 1rem;
  font-weight: 600;
  color: #bcc2d8;
  margin: 24px 0 8px;
  scroll-margin-top: 64px;
}
.wiki-content h4 {
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--text-dim);
  margin: 16px 0 6px;
  scroll-margin-top: 64px;
}
.wiki-content p { margin: 10px 0; }
.wiki-content a { color: var(--link); text-decoration: none; }
.wiki-content a:hover { color: var(--link-hover); text-decoration: underline; }
.wiki-content ul, .wiki-content ol { margin: 8px 0 8px 24px; }
.wiki-content li { margin: 4px 0; }
.wiki-content pre, .wiki-content code {
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: 5px;
  font-family: 'JetBrains Mono', 'Fira Code', ui-monospace, Consolas, monospace;
  font-size: 0.81rem;
  color: #9de0a0;
}
.wiki-content pre { padding: 14px 18px; overflow-x: auto; margin: 12px 0; line-height: 1.55; }
.wiki-content code { padding: 1px 5px; }
.wiki-content pre code { border: none; padding: 0; background: transparent; }
.wiki-content table { border-collapse: collapse; width: 100%; margin: 16px 0; font-size: 0.86rem; }
.wiki-content th { background: rgba(255,255,255,.05); padding: 8px 12px; text-align: left; font-weight: 600; color: #e2e6f0; border: 1px solid var(--border); }
.wiki-content td { padding: 7px 12px; border: 1px solid var(--border); vertical-align: top; }
.wiki-content tr:nth-child(even) td { background: rgba(255,255,255,.02); }
.wiki-content img { max-width: 100%; height: auto; border-radius: 6px; border: 1px solid var(--border); margin: 10px 0; display: block; }
.wiki-content .thumbcaption { font-size: 0.76rem; color: var(--text-dim); margin-top: 4px; font-style: italic; }
.wiki-content .thumb {
  float: right; margin: 0 0 18px 24px;
  background: var(--card-bg); border: 1px solid var(--border);
  border-radius: 8px; padding: 8px; max-width: 340px;
}
.wiki-content .thumb.tleft { float: left; margin: 0 24px 18px 0; }
.wiki-content .mw-parser-output::after { content: ''; display: table; clear: both; }
.wiki-content .toccolours {
  background: var(--card-bg); border: 1px solid var(--border);
  border-radius: 8px; padding: 14px 18px; margin: 14px 0;
}
.wiki-content .mw-collapsible-content { margin-top: 10px; }
.wiki-content dl dt { font-weight: 600; color: #e2e6f0; margin-top: 8px; }
.wiki-content dl dd { margin-left: 20px; color: var(--text-dim); }
.wiki-content hr { border: none; border-top: 1px solid var(--border); margin: 24px 0; }
/* Hide the MW TOC — we build our own */
.wiki-content #toc { display: none; }

/* ── Lightbox ── */
#lightbox {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.88);
  z-index: 2000;
  align-items: center;
  justify-content: center;
  cursor: zoom-out;
  backdrop-filter: blur(6px);
}
#lightbox.open { display: flex; }
#lightbox img {
  max-width: 92vw;
  max-height: 92vh;
  object-fit: contain;
  border-radius: 6px;
  box-shadow: 0 8px 64px rgba(0,0,0,.8);
  cursor: default;
  border: none;
}
#lightbox-close {
  position: fixed;
  top: 18px;
  right: 22px;
  font-size: 2rem;
  color: #fff;
  cursor: pointer;
  opacity: .7;
  line-height: 1;
  user-select: none;
}
#lightbox-close:hover { opacity: 1; }
.wiki-content img { cursor: zoom-in; }

/* ── YouTube placeholder ── */
.yt-placeholder { display: inline-block; max-width: 560px; width: 100%; margin: 14px 0; }
.yt-placeholder a { text-decoration: none; display: block; }
.yt-thumb { width: 100%; height: auto; display: block; border-radius: 8px; border: 1px solid var(--border); transition: opacity .15s; }
.yt-placeholder a:hover .yt-thumb { opacity: .85; }
.yt-play-btn {
  display: inline-flex; align-items: center; gap: 8px;
  background: #c00; color: #fff; font-size: 0.83rem; font-weight: 600;
  padding: 6px 14px; border-radius: 4px; margin-top: 8px;
  transition: background .15s;
}
.yt-placeholder a:hover .yt-play-btn { background: #e00; }

/* ── Index cards ── */
.card-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 14px; margin: 16px 0 8px; }
.card {
  background: var(--card-bg); border: 1px solid var(--border);
  border-radius: 8px; padding: 16px 18px;
  transition: border-color .15s, transform .15s;
}
.card:hover { border-color: var(--accent); transform: translateY(-2px); }
.card h4 { font-size: 0.88rem; font-weight: 600; color: #fff; }
.card a { text-decoration: none; color: inherit; display: block; }
.card-group h2 {
  font-size: 0.68rem; letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--text-dim); margin: 28px 0 8px;
  padding-bottom: 6px; border-bottom: 1px solid var(--border);
}

/* ── Mobile ── */
#sidebar-toggle { display: none; }

@media (max-width: 1100px) {
  #page-toc { display: none; }
}
@media (max-width: 768px) {
  body { flex-direction: column; }
  #sidebar { width: 100%; height: auto; position: relative; display: none; }
  #sidebar.open { display: block; }
  #sidebar-toggle {
    display: inline-flex; align-items: center; gap: 6px;
    background: var(--card-bg); border: 1px solid var(--border);
    border-radius: 5px; color: var(--text); padding: 5px 10px;
    font-size: 0.8rem; cursor: pointer;
  }
  #content { padding: 20px 18px 56px; }
  #topbar { padding: 10px 14px; }
  #search-overlay { padding-top: 5vh; }
  #search-modal { margin: 0 12px; }
}