/* ============================================================
   LIBROOS — Master Document Design System
   Editorial luxury · Ink / Ivory / Brass
   ============================================================ */
:root{
  --ink:#0B0E14; --ink-2:#11151D; --ink-3:#181D28; --ink-4:#212836;
  --ivory:#F5F1E8; --paper:#FBF8F1;
  --brass:#C8A24B; --brass-soft:#D9BC77; --brass-dim:rgba(200,162,75,.14);
  --teal:#3FB8AF; --coral:#E2725B; --violet:#8B7EC8;
  --txt:#E8E4DA; --txt-dim:#9AA0AC; --txt-faint:#5E6673;
  --line:rgba(232,228,218,.09); --line-strong:rgba(232,228,218,.18);
  --serif:'Fraunces',Georgia,serif;
  --sans:'Inter',-apple-system,sans-serif;
  --mono:'JetBrains Mono','SF Mono',monospace;
  --r:14px; --r-sm:9px;
  --shadow:0 20px 60px rgba(0,0,0,.45);
}
html[data-theme="light"]{
  --ink:#FBF8F1; --ink-2:#F3EFE5; --ink-3:#ECE6D8; --ink-4:#E2DAC8;
  --txt:#1A1E27; --txt-dim:#5A6070; --txt-faint:#8A8F9C;
  --line:rgba(26,30,39,.10); --line-strong:rgba(26,30,39,.22);
  --brass:#A07E2C; --brass-soft:#8A6C22; --brass-dim:rgba(160,126,44,.12);
  --shadow:0 20px 60px rgba(26,30,39,.12);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{background:var(--ink);color:var(--txt);font-family:var(--sans);font-size:16px;line-height:1.7;-webkit-font-smoothing:antialiased;transition:background .4s,color .4s}
::selection{background:var(--brass);color:#0B0E14}

/* ---------- Layout ---------- */
.doc-layout{display:grid;grid-template-columns:288px 1fr;min-height:100vh}
@media(max-width:1080px){.doc-layout{grid-template-columns:1fr}}

/* ---------- Sidebar ---------- */
#doc-sidebar{position:sticky;top:0;height:100vh;overflow-y:auto;background:var(--ink-2);border-right:1px solid var(--line);padding:28px 22px 40px;scrollbar-width:thin;scrollbar-color:var(--ink-4) transparent;z-index:50}
@media(max-width:1080px){#doc-sidebar{position:fixed;left:-320px;width:300px;transition:left .35s cubic-bezier(.2,.8,.2,1);box-shadow:var(--shadow)}#doc-sidebar.open{left:0}}
.brand{display:flex;align-items:center;gap:12px;margin-bottom:6px}
.brand-mark{width:40px;height:40px;border-radius:11px;background:linear-gradient(135deg,var(--brass),#8a6a25);display:flex;align-items:center;justify-content:center;font-family:var(--serif);font-weight:700;font-size:21px;color:#0B0E14;letter-spacing:-1px}
.brand-name{font-family:var(--serif);font-size:21px;font-weight:600;letter-spacing:3.5px;color:var(--txt)}
.brand-sub{font-size:10.5px;letter-spacing:2.4px;text-transform:uppercase;color:var(--brass);margin:2px 0 26px 52px}
.nav-group{margin-bottom:20px}
.nav-group h5{font-size:10px;letter-spacing:2.2px;text-transform:uppercase;color:var(--txt-faint);margin:0 0 8px 12px;font-weight:600}
.nav-link{display:flex;align-items:center;gap:10px;padding:8px 12px;border-radius:var(--r-sm);color:var(--txt-dim);text-decoration:none;font-size:13.5px;font-weight:500;transition:all .18s;border:1px solid transparent}
.nav-link:hover{color:var(--txt);background:var(--ink-3)}
.nav-link.active{color:var(--brass-soft);background:var(--brass-dim);border-color:rgba(200,162,75,.2)}
.nav-link .n{font-family:var(--mono);font-size:10px;color:var(--txt-faint);min-width:20px}
.nav-link.active .n{color:var(--brass)}
.theme-toggle{margin-top:24px;width:100%;padding:10px;border-radius:var(--r-sm);border:1px solid var(--line-strong);background:transparent;color:var(--txt-dim);font-family:var(--sans);font-size:12.5px;font-weight:600;cursor:pointer;display:flex;align-items:center;justify-content:center;gap:8px;transition:all .2s}
.theme-toggle:hover{border-color:var(--brass);color:var(--brass-soft)}

/* mobile top bar */
#mobile-bar{display:none;position:sticky;top:0;z-index:60;background:var(--ink-2);border-bottom:1px solid var(--line);padding:14px 18px;align-items:center;gap:14px}
@media(max-width:1080px){#mobile-bar{display:flex}}
#mobile-bar button{background:none;border:1px solid var(--line-strong);border-radius:8px;color:var(--txt);padding:7px 12px;cursor:pointer;font-size:15px}
#mobile-bar .brand-name{font-size:17px}

/* ---------- Main ---------- */
#doc-main{min-width:0;padding:0 0 120px}
.doc-inner{max-width:1060px;margin:0 auto;padding:0 44px}
@media(max-width:720px){.doc-inner{padding:0 20px}}

/* ---------- Hero ---------- */
.hero{position:relative;padding:110px 0 90px;overflow:hidden;border-bottom:1px solid var(--line)}
.hero::before{content:"";position:absolute;inset:0;background:radial-gradient(1000px 500px at 75% -10%,rgba(200,162,75,.13),transparent 60%),radial-gradient(700px 400px at 10% 110%,rgba(63,184,175,.07),transparent 60%)}
.hero .doc-inner{position:relative}
.hero-kicker{display:inline-flex;align-items:center;gap:10px;padding:7px 16px;border:1px solid rgba(200,162,75,.35);border-radius:100px;font-size:11px;letter-spacing:2.6px;text-transform:uppercase;color:var(--brass-soft);margin-bottom:34px;background:var(--brass-dim)}
.hero h1{font-family:var(--serif);font-size:clamp(44px,7vw,88px);font-weight:600;letter-spacing:8px;line-height:1.02;color:var(--txt)}
.hero h1 em{font-style:italic;color:var(--brass);letter-spacing:2px}
.hero-tag{font-family:var(--serif);font-style:italic;font-size:clamp(19px,2.6vw,27px);color:var(--txt-dim);margin:22px 0 30px;max-width:760px}
.hero-desc{max-width:720px;color:var(--txt-dim);font-size:16.5px;margin-bottom:44px}
.hero-stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:1px;background:var(--line);border:1px solid var(--line);border-radius:var(--r);overflow:hidden;max-width:880px}
.hero-stat{background:var(--ink-2);padding:20px 22px}
.hero-stat b{display:block;font-family:var(--serif);font-size:27px;color:var(--brass-soft);font-weight:600}
.hero-stat span{font-size:11.5px;letter-spacing:1.4px;text-transform:uppercase;color:var(--txt-faint)}

/* ---------- Sections ---------- */
.doc-section{padding:84px 0 20px;scroll-margin-top:30px}
.sec-label{display:flex;align-items:center;gap:14px;margin-bottom:16px}
.sec-label .num{font-family:var(--mono);font-size:12px;color:var(--brass);border:1px solid rgba(200,162,75,.4);border-radius:7px;padding:4px 10px;background:var(--brass-dim)}
.sec-label .cat{font-size:11px;letter-spacing:2.4px;text-transform:uppercase;color:var(--txt-faint)}
.doc-section h2{font-family:var(--serif);font-size:clamp(30px,4.4vw,46px);font-weight:600;line-height:1.12;margin-bottom:14px;color:var(--txt)}
.doc-section h2 em{font-style:italic;color:var(--brass)}
.sec-intro{font-size:17px;color:var(--txt-dim);max-width:780px;margin-bottom:40px}
.doc-section h3{font-family:var(--serif);font-size:25px;font-weight:600;margin:52px 0 16px;color:var(--txt)}
.doc-section h4{font-size:15px;font-weight:700;letter-spacing:.4px;margin:34px 0 12px;color:var(--brass-soft)}
.doc-section p{color:var(--txt-dim);margin-bottom:14px;max-width:820px}
.doc-section strong{color:var(--txt)}
.doc-section ul.plain{margin:0 0 18px 20px;color:var(--txt-dim)}
.doc-section ul.plain li{margin-bottom:7px}
.divider{height:1px;background:linear-gradient(90deg,transparent,var(--line-strong),transparent);margin:70px 0 0}

/* ---------- Cards ---------- */
.grid{display:grid;gap:16px;margin:26px 0}
.g2{grid-template-columns:repeat(2,1fr)}.g3{grid-template-columns:repeat(3,1fr)}.g4{grid-template-columns:repeat(4,1fr)}
@media(max-width:900px){.g3,.g4{grid-template-columns:repeat(2,1fr)}}
@media(max-width:600px){.g2,.g3,.g4{grid-template-columns:1fr}}
.card{background:var(--ink-2);border:1px solid var(--line);border-radius:var(--r);padding:24px;transition:border-color .25s,transform .25s}
.card:hover{border-color:rgba(200,162,75,.35);transform:translateY(-2px)}
.card .icon{width:40px;height:40px;border-radius:10px;background:var(--brass-dim);border:1px solid rgba(200,162,75,.25);display:flex;align-items:center;justify-content:center;color:var(--brass-soft);font-size:16px;margin-bottom:16px}
.card h5{font-size:15.5px;font-weight:700;margin-bottom:8px;color:var(--txt)}
.card p{font-size:13.5px;color:var(--txt-dim);margin:0}
.card .tag-row{margin-top:14px;display:flex;flex-wrap:wrap;gap:6px}
.card.accent{border-color:rgba(200,162,75,.4);background:linear-gradient(160deg,var(--brass-dim),var(--ink-2) 55%)}

.tag{display:inline-block;padding:3px 10px;border-radius:100px;font-size:10.5px;font-weight:600;letter-spacing:.8px;text-transform:uppercase;border:1px solid var(--line-strong);color:var(--txt-dim)}
.tag.gold{color:var(--brass-soft);border-color:rgba(200,162,75,.4);background:var(--brass-dim)}
.tag.teal{color:var(--teal);border-color:rgba(63,184,175,.35);background:rgba(63,184,175,.08)}
.tag.coral{color:var(--coral);border-color:rgba(226,114,91,.35);background:rgba(226,114,91,.08)}
.tag.violet{color:var(--violet);border-color:rgba(139,126,200,.4);background:rgba(139,126,200,.09)}

/* ---------- Tables ---------- */
.tbl-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--r);margin:26px 0;background:var(--ink-2)}
table.tbl{width:100%;border-collapse:collapse;font-size:13.5px;min-width:640px}
.tbl thead th{text-align:left;padding:13px 18px;font-size:10.5px;letter-spacing:1.8px;text-transform:uppercase;color:var(--brass-soft);background:var(--ink-3);border-bottom:1px solid var(--line-strong);white-space:nowrap}
.tbl td{padding:13px 18px;border-bottom:1px solid var(--line);color:var(--txt-dim);vertical-align:top}
.tbl tbody tr:last-child td{border-bottom:none}
.tbl tbody tr:hover td{background:rgba(200,162,75,.03)}
.tbl td b,.tbl td strong{color:var(--txt);font-weight:600}
.tbl .mono{font-family:var(--mono);font-size:12px;color:var(--teal)}

/* priority pills */
.pill{display:inline-block;padding:2px 10px;border-radius:100px;font-size:10.5px;font-weight:700;letter-spacing:.6px}
.pill.p0{background:rgba(226,114,91,.15);color:var(--coral)}
.pill.p1{background:var(--brass-dim);color:var(--brass-soft)}
.pill.p2{background:rgba(63,184,175,.12);color:var(--teal)}
.pill.p3{background:rgba(139,126,200,.14);color:var(--violet)}

/* ---------- Flow diagrams ---------- */
.flow{display:flex;flex-wrap:wrap;align-items:stretch;gap:0;margin:28px 0}
.flow-step{flex:1;min-width:150px;background:var(--ink-2);border:1px solid var(--line);padding:18px 16px;position:relative;border-radius:0}
.flow-step:first-child{border-radius:var(--r) 0 0 var(--r)}
.flow-step:last-child{border-radius:0 var(--r) var(--r) 0}
.flow-step+.flow-step{border-left:none}
.flow-step .fs-n{font-family:var(--mono);font-size:10px;color:var(--brass);margin-bottom:6px}
.flow-step b{display:block;font-size:13.5px;color:var(--txt);margin-bottom:4px}
.flow-step span{font-size:12px;color:var(--txt-faint);line-height:1.5;display:block}
.flow-step::after{content:"→";position:absolute;right:-9px;top:50%;transform:translateY(-50%);color:var(--brass);font-size:14px;z-index:2;background:var(--ink);border-radius:50%;width:18px;height:18px;line-height:18px;text-align:center}
.flow-step:last-child::after{display:none}
@media(max-width:800px){.flow{flex-direction:column}.flow-step{border-radius:0!important;border-left:1px solid var(--line)!important;border-top:none}.flow-step:first-child{border-radius:var(--r) var(--r) 0 0!important;border-top:1px solid var(--line)}.flow-step:last-child{border-radius:0 0 var(--r) var(--r)!important}.flow-step::after{content:"↓";right:auto;left:50%;top:auto;bottom:-10px;transform:translateX(-50%)}}

/* vertical pipeline */
.pipe{position:relative;margin:30px 0;padding-left:34px}
.pipe::before{content:"";position:absolute;left:11px;top:8px;bottom:8px;width:2px;background:linear-gradient(180deg,var(--brass),rgba(200,162,75,.1))}
.pipe-item{position:relative;margin-bottom:22px;background:var(--ink-2);border:1px solid var(--line);border-radius:var(--r);padding:18px 22px}
.pipe-item::before{content:"";position:absolute;left:-29px;top:24px;width:12px;height:12px;border-radius:50%;background:var(--ink);border:3px solid var(--brass)}
.pipe-item b{color:var(--txt);font-size:14.5px}
.pipe-item p{font-size:13px;margin:6px 0 0}
.pipe-item .who{font-family:var(--mono);font-size:11px;color:var(--teal);margin-left:8px}

/* ---------- Agent map ---------- */
.agent-map{background:var(--ink-2);border:1px solid var(--line);border-radius:var(--r);padding:34px;margin:30px 0}
.agent-orch{max-width:460px;margin:0 auto 14px;background:linear-gradient(140deg,var(--brass-dim),var(--ink-3));border:1px solid rgba(200,162,75,.5);border-radius:var(--r);padding:20px 24px;text-align:center}
.agent-orch b{font-family:var(--serif);font-size:19px;color:var(--brass-soft)}
.agent-orch span{display:block;font-size:12px;color:var(--txt-dim);margin-top:4px}
.agent-lines{text-align:center;color:var(--brass);font-size:15px;letter-spacing:14px;margin:4px 0 14px;opacity:.7}
.agent-row{display:grid;grid-template-columns:repeat(auto-fit,minmax(170px,1fr));gap:12px}
.agent-cell{background:var(--ink-3);border:1px solid var(--line-strong);border-radius:var(--r-sm);padding:15px}
.agent-cell b{display:block;font-size:13.5px;color:var(--txt)}
.agent-cell i{display:block;font-style:normal;font-family:var(--mono);font-size:10px;color:var(--teal);margin:3px 0 7px}
.agent-cell span{font-size:11.5px;color:var(--txt-faint);line-height:1.5;display:block}

/* ---------- Arch layers ---------- */
.arch{margin:30px 0;border:1px solid var(--line);border-radius:var(--r);overflow:hidden}
.arch-layer{display:grid;grid-template-columns:190px 1fr;border-bottom:1px solid var(--line)}
.arch-layer:last-child{border-bottom:none}
.arch-layer .al-name{background:var(--ink-3);padding:20px;font-size:11px;letter-spacing:1.8px;text-transform:uppercase;color:var(--brass-soft);font-weight:700;display:flex;align-items:center;border-right:1px solid var(--line)}
.arch-layer .al-items{display:flex;flex-wrap:wrap;gap:8px;padding:16px 20px;background:var(--ink-2);align-items:center}
.al-chip{padding:7px 14px;border-radius:8px;background:var(--ink-4);border:1px solid var(--line-strong);font-size:12.5px;color:var(--txt);font-weight:500}
.al-chip.hl{background:var(--brass-dim);border-color:rgba(200,162,75,.4);color:var(--brass-soft)}
@media(max-width:700px){.arch-layer{grid-template-columns:1fr}.arch-layer .al-name{border-right:none;border-bottom:1px solid var(--line);padding:12px 20px}}

/* ---------- Code / schema ---------- */
pre.schema{background:#080A0F;border:1px solid var(--line);border-radius:var(--r);padding:24px;overflow-x:auto;font-family:var(--mono);font-size:12.5px;line-height:1.75;color:#B8C2D0;margin:24px 0}
html[data-theme="light"] pre.schema{background:#14181F;color:#C9D2DE}
pre.schema .k{color:var(--brass-soft)}pre.schema .t{color:var(--teal)}pre.schema .c{color:#5E6673;font-style:italic}pre.schema .s{color:#A8C48C}

/* ---------- Screen mockups ---------- */
.mock{background:var(--ink-2);border:1px solid var(--line-strong);border-radius:16px;overflow:hidden;box-shadow:var(--shadow);margin:26px 0}
.mock-bar{display:flex;align-items:center;gap:8px;padding:11px 16px;background:var(--ink-3);border-bottom:1px solid var(--line)}
.mock-bar .dot{width:10px;height:10px;border-radius:50%}
.mock-bar .dot:nth-child(1){background:#E2725B}.mock-bar .dot:nth-child(2){background:#C8A24B}.mock-bar .dot:nth-child(3){background:#3FB8AF}
.mock-bar .url{margin-left:12px;font-family:var(--mono);font-size:11px;color:var(--txt-faint);background:var(--ink);border-radius:6px;padding:4px 12px;flex:1;max-width:340px}
.mock-body{padding:0;min-height:200px}
.sk{background:var(--ink-4);border-radius:6px}
.sk.line{height:9px}
.mock-grid{display:grid;gap:14px;padding:20px}

/* wireframe blocks */
.wf{border:1px dashed var(--line-strong);border-radius:8px;padding:10px 12px;font-size:10.5px;letter-spacing:1px;text-transform:uppercase;color:var(--txt-faint);display:flex;align-items:center;justify-content:center;text-align:center;min-height:44px}
.wf.fill{background:var(--ink-3);border-style:solid}
.wf.gold{border-color:rgba(200,162,75,.5);color:var(--brass-soft);background:var(--brass-dim)}

/* ---------- Roadmap ---------- */
.road{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:16px;margin:28px 0}
.road-col{background:var(--ink-2);border:1px solid var(--line);border-radius:var(--r);overflow:hidden}
.road-col header{padding:16px 20px;border-bottom:1px solid var(--line);background:var(--ink-3)}
.road-col header b{font-family:var(--serif);font-size:18px;color:var(--txt)}
.road-col header span{display:block;font-size:11px;letter-spacing:1.6px;text-transform:uppercase;color:var(--brass-soft);margin-top:2px}
.road-col ul{list-style:none;padding:14px 20px}
.road-col li{font-size:13px;color:var(--txt-dim);padding:7px 0;border-bottom:1px dashed var(--line);display:flex;gap:9px;align-items:baseline}
.road-col li:last-child{border-bottom:none}
.road-col li::before{content:"◆";color:var(--brass);font-size:8px;flex-shrink:0}
.road-col.mvp{border-color:rgba(226,114,91,.4)}.road-col.mvp header span{color:var(--coral)}
.road-col.v1{border-color:rgba(200,162,75,.4)}
.road-col.v2{border-color:rgba(63,184,175,.4)}.road-col.v2 header span{color:var(--teal)}
.road-col.v3{border-color:rgba(139,126,200,.4)}.road-col.v3 header span{color:var(--violet)}

/* ---------- Palette ---------- */
.pal{display:grid;grid-template-columns:repeat(auto-fit,minmax(130px,1fr));gap:12px;margin:24px 0}
.pal-chip{border:1px solid var(--line);border-radius:12px;overflow:hidden}
.pal-chip .sw{height:74px}
.pal-chip .info{padding:10px 12px;background:var(--ink-2)}
.pal-chip .info b{display:block;font-size:12px;color:var(--txt)}
.pal-chip .info span{font-family:var(--mono);font-size:10.5px;color:var(--txt-faint)}

/* ---------- Callouts ---------- */
.callout{display:flex;gap:16px;background:var(--brass-dim);border:1px solid rgba(200,162,75,.3);border-left:3px solid var(--brass);border-radius:var(--r-sm);padding:18px 22px;margin:26px 0}
.callout .ci{color:var(--brass);font-size:17px;flex-shrink:0;padding-top:2px}
.callout p{font-size:13.5px;margin:0;color:var(--txt-dim)}
.callout p b{color:var(--brass-soft)}
.callout.teal{background:rgba(63,184,175,.07);border-color:rgba(63,184,175,.3);border-left-color:var(--teal)}
.callout.teal .ci{color:var(--teal)}

/* footer */
.doc-footer{border-top:1px solid var(--line);margin-top:100px;padding:44px 0;text-align:center;color:var(--txt-faint);font-size:12.5px;letter-spacing:1px}
.doc-footer b{font-family:var(--serif);letter-spacing:3px;color:var(--brass-soft)}

/* reveal animation */
.reveal{opacity:0;transform:translateY(22px);transition:opacity .7s ease,transform .7s ease}
.reveal.vis{opacity:1;transform:none}

/* scrollbar */
::-webkit-scrollbar{width:10px;height:10px}
::-webkit-scrollbar-thumb{background:var(--ink-4);border-radius:5px}
::-webkit-scrollbar-track{background:transparent}