/* ═══════════════════════════════════════════════════════════════════════════
   Epistemic Memory Engine — Cyberpunk Light Docs Theme
   Multi-page documentation with sidebar, TOC, search
   ═══════════════════════════════════════════════════════════════════════════ */

/* --- Reset & Variables --- */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --bg:#f8f9fc;--bg-alt:#eef0f5;--bg-card:#fff;
  --text:#1a1a2e;--text-dim:#555;--text-muted:#888;
  --border:#dde0e8;--border-hover:#bfc3d0;
  --accent:#00d4ff;--accent2:#7c3aed;--accent3:#f72585;
  --accent-bg:rgba(0,212,255,.08);--accent2-bg:rgba(124,58,237,.08);
  --code-bg:#f0f2f6;--code-border:#dde0e8;
  --sidebar-w:280px;--toc-w:220px;--topnav-h:56px;
  --radius:8px;--radius-sm:4px;
  --font:'Inter',system-ui,-apple-system,sans-serif;
  --mono:'JetBrains Mono','Fira Code',monospace;
  --shadow:0 1px 3px rgba(0,0,0,.06),0 1px 2px rgba(0,0,0,.04);
  --shadow-lg:0 4px 16px rgba(0,0,0,.08);
}
html{scroll-behavior:smooth;font-size:16px}
body{font-family:var(--font);background:var(--bg);color:var(--text);line-height:1.7;-webkit-font-smoothing:antialiased}
a{color:var(--accent2);text-decoration:none;transition:color .15s}
a:hover{color:var(--accent3)}
img{max-width:100%;height:auto}
code{font-family:var(--mono);font-size:.875em;background:var(--code-bg);padding:2px 6px;border-radius:var(--radius-sm);border:1px solid var(--code-border)}
pre code{background:none;border:none;padding:0;font-size:.85rem;line-height:1.6}
h1,h2,h3,h4{font-weight:700;letter-spacing:-.01em;line-height:1.3}
h1{font-size:2rem;margin-bottom:16px}
h2{font-size:1.5rem;margin:48px 0 16px;padding-top:24px;border-top:1px solid var(--border)}
h3{font-size:1.15rem;margin:32px 0 12px}
h2:first-child{border-top:none;margin-top:0;padding-top:0}

/* --- Top Navigation --- */
.topnav{position:fixed;top:0;left:0;right:0;width:100%;height:var(--topnav-h);background:rgba(248,249,252,.92);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border-bottom:1px solid var(--border);z-index:100}
.topnav-inner{max-width:1400px;margin:0 auto;height:100%;display:flex;flex-wrap:nowrap;align-items:center;padding:0 20px;gap:16px}
.topnav-left{display:flex;flex-shrink:0;align-items:center;gap:12px}
.topnav-logo{font-weight:800;font-size:1.1rem;color:var(--text);display:inline-flex;align-items:center;gap:6px;white-space:nowrap}
.topnav-logo:hover{color:var(--accent2)}
.logo-icon{display:inline-flex;align-items:center;justify-content:center;width:28px;height:28px;border-radius:6px;background:linear-gradient(135deg,var(--accent),var(--accent2));color:#fff;font-weight:900;font-size:.9rem;font-style:italic}
.topnav-links{display:flex;flex-wrap:nowrap;gap:4px;margin-left:32px}
.topnav-links a{padding:6px 12px;border-radius:var(--radius-sm);color:var(--text-dim);font-size:.875rem;font-weight:500;white-space:nowrap;transition:all .15s}
.topnav-links a:hover{background:var(--accent-bg);color:var(--accent2)}
.topnav-right{margin-left:auto;display:flex;flex-shrink:0;align-items:center;gap:12px}
.sidebar-toggle{display:none;background:none;border:none;color:var(--text);cursor:pointer;padding:4px}

/* --- Search Box --- */
.search-box{display:flex;align-items:center;gap:8px;background:var(--bg-alt);border:1px solid var(--border);border-radius:var(--radius);padding:6px 12px;min-width:200px;cursor:text;transition:border-color .15s}
.search-box:focus-within{border-color:var(--accent);box-shadow:0 0 0 3px rgba(0,212,255,.12)}
.search-icon{flex-shrink:0;color:var(--text-muted)}
.search-input{border:none;background:none;outline:none;font-family:var(--font);font-size:.85rem;color:var(--text);width:100%}
.search-input::placeholder{color:var(--text-muted)}
.search-kbd{font-family:var(--mono);font-size:.7rem;color:var(--text-muted);background:var(--bg-card);border:1px solid var(--border);border-radius:3px;padding:1px 5px;flex-shrink:0}

/* --- Search Modal --- */
.search-modal{display:none;position:fixed;inset:0;z-index:200;background:rgba(0,0,0,.4);backdrop-filter:blur(4px);align-items:flex-start;justify-content:center;padding-top:15vh}
.search-modal.open{display:flex}
.search-modal-inner{background:var(--bg-card);border-radius:12px;width:90%;max-width:560px;box-shadow:var(--shadow-lg);overflow:hidden}
.search-modal-input{width:100%;padding:16px 20px;border:none;outline:none;font-family:var(--font);font-size:1rem;border-bottom:1px solid var(--border)}
.search-results{max-height:400px;overflow-y:auto;padding:8px}
.search-result{display:block;padding:10px 16px;border-radius:var(--radius-sm);color:var(--text);transition:background .1s}
.search-result:hover,.search-result.active{background:var(--accent-bg);color:var(--accent2)}
.search-result-title{font-weight:600;font-size:.9rem}
.search-result-desc{font-size:.8rem;color:var(--text-dim);margin-top:2px}
.search-empty{padding:24px;text-align:center;color:var(--text-muted);font-size:.9rem}

/* --- Docs Layout (3-column) --- */
.docs-layout{margin-top:var(--topnav-h);display:flex;min-height:calc(100vh - var(--topnav-h))}
.sidebar{position:fixed;top:var(--topnav-h);left:0;width:var(--sidebar-w);height:calc(100vh - var(--topnav-h));border-right:1px solid var(--border);background:var(--bg-card);z-index:50;overflow:hidden}
.sidebar-scroll{height:100%;overflow-y:auto;padding:20px 0}
.docs-main{margin-left:var(--sidebar-w);flex:1;display:flex;max-width:calc(100% - var(--sidebar-w));min-width:0}
.docs-content{flex:1;max-width:780px;padding:40px 48px 80px;min-width:0}
.toc{position:sticky;top:var(--topnav-h);width:var(--toc-w);height:calc(100vh - var(--topnav-h));padding:24px 16px;overflow-y:auto;flex-shrink:0;border-left:1px solid var(--border);display:none}
@media(min-width:1200px){.toc{display:block}}

/* --- Sidebar Groups --- */
.sb-group{margin-bottom:4px}
.sb-group-title{display:flex;align-items:center;justify-content:space-between;width:100%;padding:8px 20px;background:none;border:none;font-family:var(--font);font-size:.8rem;font-weight:700;color:var(--text-dim);text-transform:uppercase;letter-spacing:.04em;cursor:pointer;transition:color .15s}
.sb-group-title:hover{color:var(--accent2)}
.sb-chevron{width:14px;height:14px;fill:none;stroke:currentColor;stroke-width:2.5;stroke-linecap:round;stroke-linejoin:round;transition:transform .2s}
.sb-group.open .sb-chevron{transform:rotate(90deg)}
.sb-items{display:none;list-style:none;padding:0 0 8px}
.sb-group.open .sb-items{display:block}
.sb-items a{display:block;padding:5px 20px 5px 28px;font-size:.875rem;color:var(--text-dim);border-left:2px solid transparent;transition:all .15s}
.sb-items a:hover{color:var(--accent2);background:var(--accent2-bg)}
.sb-items a.active{color:var(--accent2);border-left-color:var(--accent2);font-weight:600;background:var(--accent2-bg)}

/* --- Table of Contents --- */
.toc-title{font-size:.75rem;font-weight:700;color:var(--text-dim);text-transform:uppercase;letter-spacing:.04em;margin-bottom:12px}
.toc-links a{display:block;padding:3px 0;font-size:.8rem;color:var(--text-muted);border-left:2px solid var(--border);padding-left:12px;transition:all .15s}
.toc-links a:hover{color:var(--accent2)}
.toc-links a.active{color:var(--accent2);border-left-color:var(--accent2);font-weight:500}
.toc-links a.toc-h3{padding-left:24px;font-size:.78rem}

/* --- Docs Content Typography --- */
.docs-lead{font-size:1.15rem;color:var(--text-dim);margin-bottom:32px;line-height:1.7}
.docs-content ul,.docs-content ol{margin:12px 0 20px 24px}
.docs-content li{margin-bottom:6px}
.docs-content p{margin-bottom:16px}
.docs-content blockquote{border-left:3px solid var(--accent2);padding:12px 20px;margin:20px 0;background:var(--accent2-bg);border-radius:0 var(--radius) var(--radius) 0;font-style:italic}

/* --- Code Blocks --- */
.code-block{position:relative;background:var(--code-bg);border:1px solid var(--code-border);border-radius:var(--radius);margin:16px 0 24px;overflow:hidden}
.code-block pre{padding:16px 20px;overflow-x:auto;margin:0}
.code-title{padding:8px 16px;font-size:.75rem;font-weight:600;color:var(--text-dim);border-bottom:1px solid var(--code-border);background:rgba(0,0,0,.02)}
.copy-btn{position:absolute;top:8px;right:8px;padding:4px 10px;font-size:.7rem;font-weight:600;background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-sm);cursor:pointer;color:var(--text-dim);transition:all .15s;z-index:2}
.copy-btn:hover{border-color:var(--accent);color:var(--accent)}
.copy-btn.copied{background:var(--accent);color:#fff;border-color:var(--accent)}

/* Syntax highlight */
.c-key{color:#7c3aed}.c-str{color:#059669}.c-num{color:#d97706}.c-bool{color:#0891b2}.c-comment{color:#94a3b8;font-style:italic}

/* --- Params Table --- */
.params-table{width:100%;border-collapse:collapse;margin:16px 0 24px;font-size:.875rem}
.params-table thead{background:var(--bg-alt)}
.params-table th{text-align:left;padding:10px 14px;font-weight:600;color:var(--text-dim);font-size:.8rem;text-transform:uppercase;letter-spacing:.03em;border-bottom:2px solid var(--border)}
.params-table td{padding:10px 14px;border-bottom:1px solid var(--border);vertical-align:top}
.params-table tr:last-child td{border-bottom:none}

/* --- Callouts --- */
.callout{padding:16px 20px;border-radius:var(--radius);margin:20px 0;border-left:3px solid}
.callout-info{background:rgba(0,212,255,.06);border-color:var(--accent)}
.callout-success{background:rgba(5,150,105,.06);border-color:#059669}
.callout-warning{background:rgba(217,119,6,.06);border-color:#d97706}
.callout-danger{background:rgba(247,37,133,.06);border-color:var(--accent3)}

/* --- Badges --- */
.badge{display:inline-block;padding:3px 10px;border-radius:99px;font-size:.75rem;font-weight:600;line-height:1.4}
.badge-green{background:rgba(5,150,105,.1);color:#059669}
.badge-blue{background:rgba(0,212,255,.1);color:#0891b2}
.badge-red{background:rgba(247,37,133,.1);color:#e11d48}
.badge-orange{background:rgba(217,119,6,.1);color:#d97706}
.badge-outline{background:transparent;border:1px solid var(--border);color:var(--text-dim)}
.badge-dot{display:inline-block;width:6px;height:6px;border-radius:50%;background:currentColor;margin-right:4px;vertical-align:middle}

/* --- Formula Block --- */
.formula-block{background:var(--accent2-bg);padding:16px 24px;border-radius:var(--radius);margin:16px 0 24px;font-family:var(--mono);font-size:.9rem;text-align:center;border:1px solid rgba(124,58,237,.15)}

/* --- Docs Footer (prev/next) --- */
.docs-footer{display:flex;justify-content:space-between;margin-top:64px;padding-top:24px;border-top:1px solid var(--border)}
.docs-footer-link{padding:12px 20px;border:1px solid var(--border);border-radius:var(--radius);font-weight:600;font-size:.9rem;transition:all .15s}
.docs-footer-link:hover{border-color:var(--accent2);background:var(--accent2-bg);color:var(--accent2)}

/* --- Next Links Grid --- */
.next-links{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:16px;margin:24px 0}
.next-card{display:block;padding:20px;border:1px solid var(--border);border-radius:var(--radius);transition:all .2s}
.next-card:hover{border-color:var(--accent2);box-shadow:var(--shadow);transform:translateY(-2px)}
.next-card strong{display:block;margin-bottom:4px;color:var(--text)}
.next-card span{font-size:.85rem;color:var(--text-dim)}

/* --- Tool Name --- */
.tool-name{font-size:1.1rem;font-weight:600;vertical-align:middle}

/* --- Version Date --- */
.version-date{font-size:.85rem;font-weight:400;color:var(--text-muted)}

/* --- Pipeline Diagram (Horizontal) --- */
.pipeline-diagram{display:flex;align-items:center;flex-wrap:wrap;gap:8px;margin:24px 0 32px;padding:20px;background:var(--bg-alt);border-radius:var(--radius)}
.pd-stage{display:flex;align-items:center;gap:10px;padding:10px 14px;background:var(--bg-card);border-radius:var(--radius);border:1px solid var(--border);border-left:3px solid var(--accent,var(--accent2))}
.pd-label{font-family:var(--mono);font-weight:700;font-size:.8rem;color:var(--accent,var(--accent2));min-width:30px}
.pd-name{font-weight:600;font-size:.85rem}
.pd-desc{font-size:.78rem;color:var(--text-dim);display:none}
.pd-arrow{color:var(--text-muted);font-weight:700}
@media(min-width:900px){.pipeline-diagram{flex-wrap:nowrap;overflow-x:auto}}

/* --- Pipeline Viz (Vertical, Landing) --- */
.pipeline-viz{max-width:600px;margin:0 auto 32px}
.pv-layer{display:flex;align-items:center;gap:16px;padding:14px 20px;background:var(--bg-card);border-radius:var(--radius);border:1px solid var(--border);border-left:4px solid var(--c,var(--accent))}
.pv-id{font-family:var(--mono);font-weight:800;font-size:.85rem;color:var(--c);min-width:36px}
.pv-info strong{display:block;font-size:.95rem}
.pv-info span{font-size:.82rem;color:var(--text-dim)}
.pv-arrow{text-align:center;color:var(--text-muted);font-size:1.2rem;padding:4px}

/* ═══════════════════════════════════════════════════════════════════════════
   LANDING PAGE
   ═══════════════════════════════════════════════════════════════════════════ */
body.landing{background:var(--bg)}
.landing-nav{background:rgba(248,249,252,.85)}
.lang-btn{font-size:.8rem;padding:4px 10px;border:1px solid var(--border);border-radius:var(--radius-sm)}
.lang-btn:hover{border-color:var(--accent)}

/* Hero */
.hero{position:relative;padding:120px 20px 80px;text-align:center;overflow:hidden}
.hero-grid-bg{position:absolute;inset:0;background-image:radial-gradient(circle at 1px 1px,rgba(0,0,0,.04) 1px,transparent 0);background-size:40px 40px;z-index:0}
.hero-orb{position:absolute;border-radius:50%;filter:blur(80px);opacity:.2;z-index:0;pointer-events:none}
.hero-orb-1{width:500px;height:500px;background:var(--accent);top:-100px;right:-100px}
.hero-orb-2{width:400px;height:400px;background:var(--accent2);bottom:-50px;left:-80px}
.hero-content{position:relative;z-index:1;max-width:800px;margin:0 auto}
.hero-badges{display:flex;gap:10px;justify-content:center;margin-bottom:28px;flex-wrap:wrap}
.hero-badges .badge{display:inline-flex;align-items:center;padding:5px 14px;border-radius:99px;font-size:.8rem;font-weight:600;line-height:1.4;letter-spacing:.01em}
.hero-badges .badge-green{background:rgba(5,150,105,.12);color:#059669;border:1px solid rgba(5,150,105,.2)}
.hero-badges .badge-outline{background:rgba(124,58,237,.05);border:1px solid rgba(124,58,237,.2);color:var(--accent2)}
.hero h1{font-size:3.2rem;font-weight:900;letter-spacing:-.03em;margin-bottom:16px;color:var(--text)}
.gradient-text{display:inline;background:linear-gradient(135deg,var(--accent) 0%,var(--accent2) 50%,var(--accent3) 100%);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;color:transparent}
.hero-sub{font-size:1.2rem;color:var(--text-dim);max-width:600px;margin:0 auto 32px;line-height:1.7}
.hero-actions{display:flex;gap:12px;justify-content:center;flex-wrap:wrap;margin-bottom:48px}
.hero-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;max-width:540px;margin:0 auto;padding:24px 32px;background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow)}
.stat{text-align:center}
.stat-val{font-size:1.8rem;font-weight:800;background:linear-gradient(135deg,var(--accent),var(--accent2));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;color:transparent}
.stat-lbl{font-size:.75rem;color:var(--text-muted);margin-top:2px}

/* Buttons */
.btn{display:inline-flex;align-items:center;gap:8px;padding:12px 28px;border-radius:var(--radius);font-weight:600;font-size:.95rem;transition:all .2s;cursor:pointer;border:none;text-decoration:none}
.btn-primary{background:linear-gradient(135deg,var(--accent),var(--accent2));color:#fff;box-shadow:0 2px 12px rgba(0,212,255,.3)}
.btn-primary:hover{transform:translateY(-1px);box-shadow:0 4px 20px rgba(0,212,255,.4);color:#fff}
.btn-ghost{background:var(--bg-card);border:1px solid var(--border);color:var(--text)}
.btn-ghost:hover{border-color:var(--accent2);color:var(--accent2);background:var(--accent2-bg)}

/* Sections */
.section{padding:80px 20px}
.section-alt{background:var(--bg-alt)}
.container{max-width:1100px;margin:0 auto}
.section-head{text-align:center;margin-bottom:48px}
.section-head h2{font-size:2rem;margin:0 0 12px;border:none;padding:0}
.section-head p{font-size:1.05rem;color:var(--text-dim)}

/* Compare Grid */
.compare-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.compare-card{padding:28px;border-radius:var(--radius);border:1px solid var(--border)}
.compare-card h3{font-size:1.15rem;margin-bottom:16px}
.compare-card ul{list-style:none;padding:0}
.compare-card li{padding:8px 0;border-bottom:1px solid var(--border);font-size:.9rem}
.compare-card li:last-child{border-bottom:none}
.compare-bad{background:rgba(247,37,133,.03);border-color:rgba(247,37,133,.15)}
.compare-good{background:rgba(5,150,105,.03);border-color:rgba(5,150,105,.15)}

/* Features Grid */
.features-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:20px}
.fcard{padding:24px;background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);transition:all .2s}
.fcard:hover{border-color:var(--accent2);box-shadow:var(--shadow);transform:translateY(-2px)}
.fcard-icon{font-size:1.5rem;margin-bottom:8px}
.fcard h3{font-size:1rem;margin-bottom:8px}
.fcard p{font-size:.85rem;color:var(--text-dim);line-height:1.6}

/* Steps */
.steps{max-width:700px;margin:0 auto}
.step{display:flex;gap:20px;margin-bottom:32px}
.step-num{width:44px;height:44px;flex-shrink:0;display:flex;align-items:center;justify-content:center;font-weight:800;font-size:1.1rem;background:linear-gradient(135deg,var(--accent),var(--accent2));color:#fff;border-radius:50%}
.step-body{flex:1;min-width:0}
.step-body h3{font-size:1.1rem;margin-bottom:8px}

/* Use Cases */
.usecase-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:20px}
.usecase-card{padding:28px;background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);transition:all .2s}
.usecase-card:hover{border-color:var(--accent);box-shadow:var(--shadow)}
.usecase-icon{font-size:2rem;margin-bottom:12px}
.usecase-card h3{margin-bottom:8px}
.usecase-card p{font-size:.9rem;color:var(--text-dim);line-height:1.6}

/* Footer */
.footer{padding:60px 20px 40px;background:var(--bg-alt);border-top:1px solid var(--border)}
.footer-inner{display:flex;gap:48px;flex-wrap:wrap;max-width:1100px;margin:0 auto}
.footer-brand{max-width:300px}
.footer-brand p{color:var(--text-muted);font-size:.85rem;margin-top:12px;line-height:1.6}
.footer-cols{display:flex;gap:48px;flex-wrap:wrap;flex:1}
.footer-cols div{min-width:120px}
.footer-cols h4{font-size:.8rem;text-transform:uppercase;letter-spacing:.04em;color:var(--text-dim);margin-bottom:12px}
.footer-cols a{display:block;font-size:.875rem;color:var(--text-muted);padding:4px 0;transition:color .15s}
.footer-cols a:hover{color:var(--accent2)}

/* ═══════════════════════════════════════════════════════════════════════════
   RESPONSIVE
   ═══════════════════════════════════════════════════════════════════════════ */
@media(max-width:1024px){
  .sidebar{transform:translateX(-100%);transition:transform .25s ease}
  .sidebar.open{transform:translateX(0);box-shadow:var(--shadow-lg)}
  .sidebar-overlay{display:none;position:fixed;inset:0;background:rgba(0,0,0,.3);z-index:49}
  .sidebar-overlay.open{display:block}
  .sidebar-toggle{display:block}
  .docs-main{margin-left:0;max-width:100%}
  .docs-content{padding:32px 24px 60px}
  .topnav-links{display:none}
}
@media(max-width:768px){
  .hero h1{font-size:2.2rem}
  .hero-stats{grid-template-columns:repeat(2,1fr);gap:16px;padding:16px 20px}
  .compare-grid{grid-template-columns:1fr}
  .section{padding:48px 16px}
  .params-table{font-size:.8rem}
  .params-table th,.params-table td{padding:8px 10px}
  .topnav-links{display:none}
  .topnav-right .lang-btn{font-size:.75rem;padding:3px 8px}
}
@media(max-width:480px){
  .hero{padding:90px 16px 48px}
  .hero h1{font-size:1.8rem}
  .hero-sub{font-size:1rem}
  .features-grid{grid-template-columns:1fr}
}