/* TensorSharp Wiki — shared stylesheet */
:root {
  --accent: #f97316;
  --accent-2: #ea580c;
  --accent-soft: rgba(249, 115, 22, 0.12);
  --bg: #ffffff;
  --bg-soft: #f7f8fa;
  --bg-sunken: #f1f3f5;
  --surface: #ffffff;
  --border: #e4e7ec;
  --border-strong: #d0d5dd;
  --text: #1d2433;
  --text-soft: #475467;
  --text-muted: #667085;
  --link: #c2570c;
  --code-bg: #0f172a;
  --code-text: #e2e8f0;
  --code-comment: #7c8aa5;
  --code-string: #fdba74;
  --table-head: #f1f3f5;
  --topbar-h: 56px;
  --sidebar-w: 290px;
  --toc-w: 220px;
  --maxw: 880px;
  --radius: 10px;
  --shadow: 0 1px 3px rgba(16,24,40,.08), 0 1px 2px rgba(16,24,40,.06);
  --shadow-lg: 0 12px 32px rgba(16,24,40,.18);
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}
html.dark {
  --bg: #0d1117;
  --bg-soft: #131a24;
  --bg-sunken: #161d28;
  --surface: #131a24;
  --border: #232c39;
  --border-strong: #303a49;
  --text: #e6edf3;
  --text-soft: #aeb9c7;
  --text-muted: #8b97a7;
  --link: #f9a766;
  --accent-soft: rgba(249, 115, 22, 0.16);
  --code-bg: #0a0e16;
  --table-head: #161d28;
  --shadow: 0 1px 3px rgba(0,0,0,.4);
  --shadow-lg: 0 12px 32px rgba(0,0,0,.5);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: calc(var(--topbar-h) + 16px); }
body {
  margin: 0;
  font-family: var(--sans);
  color: var(--text);
  background: var(--bg);
  line-height: 1.65;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--link); text-decoration: none; }
a:hover { text-decoration: underline; }
.skip {
  position: absolute; left: -999px; top: 0; z-index: 200;
  background: var(--accent); color: #fff; padding: 10px 16px; border-radius: 0 0 8px 0;
}
.skip:focus { left: 0; }

/* ---------- Top bar ---------- */
.topbar {
  position: fixed; top: 0; left: 0; right: 0; height: var(--topbar-h); z-index: 100;
  display: flex; align-items: center; gap: 16px;
  padding: 0 20px;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: saturate(180%) blur(10px);
  border-bottom: 1px solid var(--border);
}
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; color: var(--text); font-size: 1.05rem; }
.brand:hover { text-decoration: none; }
.brand img { width: 26px; height: 26px; display: block; }
.brand .tag { font-weight: 400; color: var(--text-muted); font-size: .8rem; border-left: 1px solid var(--border-strong); padding-left: 10px; }
.topbar .spacer { flex: 1; }
.topbar-actions { display: flex; align-items: center; gap: 8px; }
.search-trigger {
  display: flex; align-items: center; gap: 8px;
  background: var(--bg-sunken); border: 1px solid var(--border); color: var(--text-muted);
  border-radius: 8px; padding: 7px 10px; cursor: pointer; font-size: .88rem; min-width: 200px;
}
.search-trigger:hover { border-color: var(--border-strong); }
.search-trigger kbd { margin-left: auto; }
kbd {
  font-family: var(--mono); font-size: .72rem; background: var(--bg); border: 1px solid var(--border-strong);
  border-bottom-width: 2px; border-radius: 5px; padding: 1px 6px; color: var(--text-soft);
}
.icon-btn {
  display: inline-flex; align-items: center; justify-content: center;
  width: 38px; height: 38px; border-radius: 8px; border: 1px solid var(--border);
  background: var(--surface); color: var(--text-soft); cursor: pointer;
}
.icon-btn:hover { border-color: var(--border-strong); color: var(--text); }
.icon-btn svg { width: 18px; height: 18px; }
#menu-toggle { display: none; }

/* ---------- Layout ---------- */
.layout {
  display: grid;
  grid-template-columns: var(--sidebar-w) minmax(0, 1fr) var(--toc-w);
  max-width: 1500px; margin: 0 auto;
  padding-top: var(--topbar-h);
}
.sidebar {
  position: sticky; top: var(--topbar-h); align-self: start;
  height: calc(100vh - var(--topbar-h));
  overflow-y: auto; padding: 22px 14px 60px 20px;
  border-right: 1px solid var(--border);
}
.sidebar .nav-group { margin-bottom: 22px; }
.sidebar .nav-group > h4 {
  margin: 0 0 8px; padding: 0 10px;
  font-size: .72rem; font-weight: 700; text-transform: uppercase; letter-spacing: .07em;
  color: var(--text-muted);
}
.sidebar a {
  display: block; padding: 6px 10px; border-radius: 7px;
  color: var(--text-soft); font-size: .92rem; line-height: 1.35;
}
.sidebar a:hover { background: var(--bg-soft); color: var(--text); text-decoration: none; }
.sidebar a.active { background: var(--accent-soft); color: var(--link); font-weight: 600; }

.content {
  min-width: 0; padding: 36px 48px 96px;
  max-width: calc(var(--maxw) + 96px); margin: 0 auto; width: 100%;
}
.toc {
  position: sticky; top: var(--topbar-h); align-self: start;
  height: calc(100vh - var(--topbar-h)); overflow-y: auto;
  padding: 30px 18px 60px 6px; font-size: .85rem;
}
.toc h5 { margin: 0 0 10px; font-size: .72rem; text-transform: uppercase; letter-spacing: .07em; color: var(--text-muted); }
.toc a { display: block; padding: 4px 10px; color: var(--text-muted); border-left: 2px solid transparent; }
.toc a:hover { color: var(--text); text-decoration: none; }
.toc a.lvl-3 { padding-left: 22px; font-size: .82rem; }
.toc a.active { color: var(--link); border-left-color: var(--accent); font-weight: 600; }

/* ---------- Typography & content ---------- */
.content h1 { font-size: 2.1rem; line-height: 1.2; margin: 0 0 12px; letter-spacing: -.02em; }
.content h2 {
  font-size: 1.5rem; margin: 44px 0 14px; padding-top: 8px; letter-spacing: -.01em;
  border-top: 1px solid var(--border);
}
.content h2:first-of-type { border-top: none; }
.content h3 { font-size: 1.18rem; margin: 30px 0 10px; }
.content h4 { font-size: 1rem; margin: 22px 0 8px; color: var(--text-soft); }
.content p { margin: 0 0 14px; }
.content ul, .content ol { margin: 0 0 16px; padding-left: 24px; }
.content li { margin: 5px 0; }
.content img { max-width: 100%; }
.lede { font-size: 1.18rem; color: var(--text-soft); margin-bottom: 22px; }
.heading-anchor { opacity: 0; margin-left: 8px; font-weight: 400; color: var(--text-muted); text-decoration: none; }
h2:hover .heading-anchor, h3:hover .heading-anchor { opacity: 1; }

.breadcrumb { font-size: .82rem; color: var(--text-muted); margin-bottom: 18px; }
.breadcrumb a { color: var(--text-muted); }

/* ---------- Code ---------- */
code {
  font-family: var(--mono); font-size: .86em;
  background: var(--bg-sunken); border: 1px solid var(--border);
  padding: .12em .4em; border-radius: 5px; color: var(--accent-2);
}
html.dark code { color: var(--accent); }
pre {
  position: relative; margin: 0 0 18px; background: var(--code-bg); color: var(--code-text);
  border-radius: var(--radius); padding: 16px 18px; overflow-x: auto;
  font-family: var(--mono); font-size: .84rem; line-height: 1.6; border: 1px solid #1e293b;
}
pre code { background: none; border: none; padding: 0; color: inherit; font-size: inherit; }
pre .cm { color: var(--code-comment); }
pre .str { color: var(--code-string); }
pre .kw { color: #93c5fd; }
.code-wrap { position: relative; }
.code-lang {
  position: absolute; top: 0; right: 0; z-index: 2;
  font-size: .66rem; text-transform: uppercase; letter-spacing: .06em; color: #94a3b8;
  background: #1e293b; padding: 3px 8px; border-radius: 0 var(--radius) 0 8px;
}
.copy-btn {
  position: absolute; top: 6px; right: 8px; z-index: 3;
  background: rgba(148,163,184,.15); color: #cbd5e1; border: 1px solid rgba(148,163,184,.25);
  border-radius: 6px; padding: 4px 9px; font-size: .72rem; cursor: pointer; opacity: 0; transition: opacity .15s;
}
.code-wrap:hover .copy-btn { opacity: 1; }
.copy-btn:hover { background: rgba(148,163,184,.3); }
.copy-btn.copied { color: #86efac; border-color: #86efac; }

/* ---------- Tables ---------- */
.table-scroll { overflow-x: auto; margin: 0 0 20px; border: 1px solid var(--border); border-radius: var(--radius); }
table { border-collapse: collapse; width: 100%; font-size: .9rem; }
th, td { text-align: left; padding: 9px 14px; border-bottom: 1px solid var(--border); vertical-align: top; }
thead th { background: var(--table-head); font-weight: 600; white-space: nowrap; position: sticky; top: 0; }
tbody tr:last-child td { border-bottom: none; }
tbody tr:hover { background: var(--bg-soft); }
td code, th code { white-space: nowrap; }

/* ---------- Components ---------- */
.hero {
  display: grid; grid-template-columns: 1.2fr 1fr; gap: 30px; align-items: center;
  padding: 24px 0 8px; margin-bottom: 12px;
}
.hero h1 { font-size: 2.6rem; }
.hero .pills { display: flex; flex-wrap: wrap; gap: 8px; margin: 18px 0; }
.hero-art {
  background: linear-gradient(135deg, #0f172a, #1e293b); border-radius: 16px; padding: 22px;
  color: #e2e8f0; box-shadow: var(--shadow-lg); font-family: var(--mono); font-size: .8rem; line-height: 1.7;
  border: 1px solid #243042;
}
.hero-art .c-cm { color: #64748b; } .hero-art .c-ac { color: var(--accent); } .hero-art .c-st { color: #fdba74; }

.pill {
  display: inline-flex; align-items: center; gap: 6px;
  background: var(--accent-soft); color: var(--link); border: 1px solid color-mix(in srgb, var(--accent) 30%, transparent);
  border-radius: 999px; padding: 4px 12px; font-size: .8rem; font-weight: 600;
}
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--accent); color: #fff; border: 1px solid var(--accent-2);
  padding: 10px 18px; border-radius: 9px; font-weight: 600; font-size: .95rem; cursor: pointer;
}
.btn:hover { background: var(--accent-2); text-decoration: none; color: #fff; }
.btn.secondary { background: var(--surface); color: var(--text); border-color: var(--border-strong); }
.btn.secondary:hover { background: var(--bg-soft); color: var(--text); }
.btn-row { display: flex; flex-wrap: wrap; gap: 12px; margin: 22px 0; }

.card-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: 16px; margin: 22px 0; }
.card {
  display: block; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 18px; box-shadow: var(--shadow); color: var(--text);
}
a.card:hover { border-color: var(--accent); text-decoration: none; transform: translateY(-2px); transition: .15s; }
.card .ic { font-size: 1.5rem; margin-bottom: 8px; }
.card h3 { margin: 0 0 6px; font-size: 1.05rem; }
.card p { margin: 0; color: var(--text-muted); font-size: .9rem; }

.callout {
  display: flex; gap: 12px; padding: 14px 16px; border-radius: var(--radius); margin: 0 0 18px;
  background: var(--bg-soft); border: 1px solid var(--border); border-left: 4px solid var(--border-strong);
}
.callout .ic { font-size: 1.1rem; flex-shrink: 0; }
.callout p { margin: 0; }
.callout.tip { border-left-color: #16a34a; background: color-mix(in srgb, #16a34a 8%, var(--bg)); }
.callout.note { border-left-color: var(--accent); background: var(--accent-soft); }
.callout.warn { border-left-color: #d97706; background: color-mix(in srgb, #d97706 9%, var(--bg)); }

.tag-list { display: flex; flex-wrap: wrap; gap: 7px; margin: 0 0 18px; }
.tag-list .t { font-size: .78rem; background: var(--bg-sunken); border: 1px solid var(--border); border-radius: 6px; padding: 3px 9px; color: var(--text-soft); }

.yesno { font-weight: 600; }
.yes { color: #16a34a; } .no { color: var(--text-muted); }

.audience { display: grid; grid-template-columns: repeat(auto-fill, minmax(250px,1fr)); gap: 14px; margin: 20px 0; }
.audience .a { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 16px; }
.audience .a h4 { margin: 0 0 6px; color: var(--text); }
.audience .a p { margin: 0; color: var(--text-muted); font-size: .9rem; }

.steps { counter-reset: step; list-style: none; padding-left: 0; }
.steps > li { counter-increment: step; position: relative; padding-left: 46px; margin-bottom: 22px; }
.steps > li::before {
  content: counter(step); position: absolute; left: 0; top: 0;
  width: 30px; height: 30px; border-radius: 50%; background: var(--accent); color: #fff;
  display: flex; align-items: center; justify-content: center; font-weight: 700; font-size: .9rem;
}
.steps > li h3 { margin: 2px 0 8px; }

.content-footer {
  margin-top: 60px; padding-top: 20px; border-top: 1px solid var(--border);
  display: flex; justify-content: space-between; gap: 16px; font-size: .9rem; flex-wrap: wrap;
}
.content-footer a { font-weight: 600; }
.page-foot-note { color: var(--text-muted); font-size: .82rem; margin-top: 14px; }

/* ---------- Search overlay ---------- */
#search-overlay {
  position: fixed; inset: 0; z-index: 300; display: none;
  background: rgba(10,14,22,.5); backdrop-filter: blur(2px);
  padding-top: 10vh;
}
#search-overlay.open { display: block; }
.search-box {
  max-width: 640px; margin: 0 auto; background: var(--surface); border: 1px solid var(--border-strong);
  border-radius: 14px; box-shadow: var(--shadow-lg); overflow: hidden;
}
.search-box input {
  width: 100%; border: none; padding: 18px 20px; font-size: 1.05rem; background: transparent; color: var(--text);
  outline: none; border-bottom: 1px solid var(--border);
}
.search-results { max-height: 56vh; overflow-y: auto; }
.search-results a {
  display: block; padding: 12px 20px; border-bottom: 1px solid var(--border); color: var(--text);
}
.search-results a:hover, .search-results a.sel { background: var(--accent-soft); text-decoration: none; }
.search-results .r-title { font-weight: 600; }
.search-results .r-page { font-size: .76rem; color: var(--accent-2); text-transform: uppercase; letter-spacing: .04em; }
.search-results .r-snip { font-size: .85rem; color: var(--text-muted); margin-top: 2px; }
.search-results mark { background: color-mix(in srgb, var(--accent) 40%, transparent); color: inherit; border-radius: 3px; padding: 0 2px; }
.search-empty { padding: 30px 20px; text-align: center; color: var(--text-muted); }
.search-foot { padding: 8px 20px; font-size: .76rem; color: var(--text-muted); display: flex; gap: 14px; border-top: 1px solid var(--border); }

/* ---------- Responsive ---------- */
@media (max-width: 1180px) {
  .layout { grid-template-columns: var(--sidebar-w) minmax(0,1fr); }
  .toc { display: none; }
}
@media (max-width: 860px) {
  :root { --topbar-h: 54px; }
  .layout { grid-template-columns: 1fr; }
  #menu-toggle { display: inline-flex; }
  .sidebar {
    position: fixed; left: 0; top: var(--topbar-h); bottom: 0; width: 84%; max-width: 320px; z-index: 90;
    background: var(--bg); transform: translateX(-100%); transition: transform .2s ease; box-shadow: var(--shadow-lg);
  }
  body.menu-open .sidebar { transform: translateX(0); }
  body.menu-open::after { content:""; position: fixed; inset: var(--topbar-h) 0 0 0; background: rgba(0,0,0,.4); z-index: 80; }
  .content { padding: 26px 20px 80px; }
  .hero { grid-template-columns: 1fr; }
  .hero-art { display: none; }
  .search-trigger { min-width: 0; }
  .search-trigger .lbl { display: none; }
}
@media (max-width: 520px) {
  .brand .tag { display: none; }
}