/* Native-theme write-up. White background, sans body, serif headings. Own styling. */
:root{
  --ink:#1a1a1a; --muted:#5c5c5c; --faint:#8a8a8a;
  --bg:#ffffff; --panel:#f7f7f5; --rule:#e2e2dd;
  --harness:#2f6f7d;   /* teal */
  --retrieval:#8a6d3b; /* ochre */
  --imaging:#8a3f57;   /* plum */
  --accent:#c0561a;    /* ember */
  --good:#2e6e4e; --mid:#8a5a12; --bad:#9c2f2a;
  --maxw:820px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0; background:var(--bg); color:var(--ink);
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Helvetica,Arial,sans-serif;
  font-size:18px; line-height:1.62; -webkit-font-smoothing:antialiased;
}
.wrap{max-width:var(--maxw); margin:0 auto; padding:0 22px}
h1,h2,h3,h4,.serif{font-family:Georgia,"Times New Roman",serif}
h1{font-size:2.5rem; line-height:1.12; margin:0 0 .2em; letter-spacing:-.01em}
h2{font-size:1.7rem; line-height:1.2; margin:2.4em 0 .5em; letter-spacing:-.01em}
h3{font-size:1.25rem; margin:1.8em 0 .4em}
p{margin:0 0 1.05em}
a{color:var(--accent)}
.lede{font-size:1.28rem; line-height:1.5; color:#2a2a2a; margin:0 0 1.2em}
.byline{color:var(--faint); font-size:.95rem; margin:0 0 2.2em; border-bottom:1px solid var(--rule); padding-bottom:1.6em}
.hero{padding:64px 0 8px}
strong{font-weight:700}
em{color:#333}
.small{font-size:.9rem}
.muted{color:var(--muted)}
.faint{color:var(--faint)}
code{font-family:ui-monospace,Menlo,Consolas,monospace; font-size:.86em; background:var(--panel); padding:1px 5px; border-radius:4px}

/* section tinting per subsystem */
.sub{border-top:1px solid var(--rule); margin-top:2.6em; padding-top:.4em}
.tag{display:inline-block; font-family:Georgia,serif; font-size:.8rem; font-weight:700; letter-spacing:.06em;
  text-transform:uppercase; padding:3px 10px; border-radius:20px; color:#fff; margin-bottom:.2em}
.tag.harness{background:var(--harness)} .tag.retrieval{background:var(--retrieval)} .tag.imaging{background:var(--imaging)}

/* callout / takeaway */
.take{background:var(--panel); border-left:4px solid var(--accent); padding:14px 18px; margin:1.4em 0; border-radius:0 6px 6px 0}
.take .lbl{font-family:Georgia,serif; font-weight:700; font-size:.8rem; text-transform:uppercase; letter-spacing:.06em; color:var(--accent); display:block; margin-bottom:.2em}
.take p:last-child{margin-bottom:0}
.decision{border-left-color:var(--good)}
.decision .lbl{color:var(--good)}

/* figures */
figure{margin:1.8em 0; padding:0}
figure svg{display:block; width:100%; height:auto}
figcaption{font-family:Georgia,serif; font-size:.92rem; color:var(--muted); margin-top:.7em; line-height:1.45}
.fig-panel{background:var(--panel); border:1px solid var(--rule); border-radius:10px; padding:18px 18px 8px}

/* example card */
.card{background:var(--panel); border:1px solid var(--rule); border-radius:10px; padding:16px 18px; margin:1.4em 0; font-size:.96rem}
.card h4{margin:.1em 0 .5em; font-size:1.02rem}
.crit{list-style:none; padding:0; margin:.4em 0}
.crit li{padding:3px 0 3px 24px; position:relative; line-height:1.4}
.crit li::before{position:absolute; left:0; top:2px; font-weight:700}
.crit li.y::before{content:"\2713"; color:var(--good)}
.crit li.n::before{content:"\2717"; color:var(--bad)}
.quote{font-style:italic; color:#333; border-left:3px solid var(--rule); padding-left:14px; margin:.6em 0}

/* architecture diagram */
.arch-note{font-size:.9rem; color:var(--muted); text-align:center; margin-top:.4em}
.arch a rect, .arch a path{cursor:pointer; transition:filter .15s}
.arch a:hover rect{filter:brightness(1.06)}

/* case viewer */
#viewer{margin-top:1.2em}
.vw-controls{display:flex; flex-wrap:wrap; gap:12px 18px; align-items:flex-end; background:var(--panel);
  border:1px solid var(--rule); border-radius:10px; padding:14px 16px; margin:12px 0}
.vw-controls .grp{display:flex; flex-direction:column; gap:3px; font-size:.82rem; color:var(--muted)}
.vw-controls select, .vw-controls input{font-size:.92rem; padding:5px 8px; border:1px solid var(--rule); border-radius:6px; background:#fff; font-family:inherit}
.vw-controls label.chk{flex-direction:row; align-items:center; gap:6px; font-size:.9rem; color:var(--ink); cursor:pointer}
.vw-count{margin-left:auto; color:var(--faint); font-size:.85rem}
table.vw{width:100%; border-collapse:collapse; font-size:.86rem}
table.vw th{position:sticky; top:0; background:#fff; text-align:right; padding:7px 8px; border-bottom:2px solid var(--rule); cursor:pointer; white-space:nowrap; font-family:Georgia,serif}
table.vw th.l, table.vw td.l{text-align:left}
table.vw td{padding:6px 8px; border-bottom:1px solid var(--rule); text-align:right; font-variant-numeric:tabular-nums; vertical-align:top}
.vw-row{cursor:pointer}
.vw-row:hover{background:#faf6f2}
.pill{display:inline-block; padding:1px 8px; border-radius:20px; font-size:.72rem; font-weight:700; color:#fff}
.pill.harness{background:var(--harness)} .pill.retrieval{background:var(--retrieval)} .pill.imaging{background:var(--imaging)}
.sc-hi{color:var(--good)} .sc-mid{color:var(--mid)} .sc-lo{color:var(--bad); font-weight:700} .sc-na{color:var(--faint)}
.ot{display:inline-block; padding:1px 7px; border-radius:20px; font-size:.7rem; font-weight:700; background:#f3d6d3; color:#8a2b25}
.vw-detail{background:#fbfaf8; border-left:3px solid var(--accent)}
.vw-detail td{text-align:left}
.dt-grid{display:grid; grid-template-columns:1fr 1fr; gap:20px}
@media(max-width:760px){.dt-grid{grid-template-columns:1fr}}
.dt h5{font-family:Georgia,serif; margin:14px 0 5px; font-size:1rem}
.dt h5:first-child{margin-top:0}
.kv{font-family:ui-monospace,Menlo,monospace; font-size:.78rem; color:#555; margin:2px 0}
.rat{font-size:.85rem; color:#444; margin:3px 0 9px}
.rat b{color:#222}
.answer{white-space:pre-wrap; max-height:340px; overflow:auto; background:#fff; border:1px solid var(--rule); border-radius:6px; padding:10px 12px; font-size:.82rem; line-height:1.5}
.passage{padding:5px 0; border-bottom:1px dotted var(--rule); font-size:.82rem}
.passage .src{font-family:ui-monospace,monospace; font-size:.72rem; color:var(--faint)}
.step{font-family:ui-monospace,monospace; font-size:.78rem; padding:3px 0; border-bottom:1px dotted var(--rule); color:#444}
.unavail{color:var(--faint); font-style:italic; font-size:.85rem}
.miss-note{background:#fbf3e8; border:1px solid #e6d8bf; color:#7a5a1e; font-size:.8rem; padding:6px 10px; border-radius:6px; margin:6px 0}

/* summary stat strip in viewer */
.vw-summary{display:flex; flex-wrap:wrap; gap:10px; margin:10px 0}
.vw-stat{flex:1 1 120px; background:var(--panel); border:1px solid var(--rule); border-radius:8px; padding:9px 12px}
.vw-stat .lab{font-size:.72rem; color:var(--muted)}
.vw-stat .val{font-family:Georgia,serif; font-size:1.15rem; font-variant-numeric:tabular-nums}

hr.end{border:0; border-top:1px solid var(--rule); margin:3em 0 2em}
.limits li{margin-bottom:.5em}
footer{color:var(--faint); font-size:.85rem; padding:2em 0 4em}
.jump{display:flex; gap:8px; flex-wrap:wrap; margin:1em 0 0}
.jump a{font-size:.82rem; text-decoration:none; padding:5px 11px; border:1px solid var(--rule); border-radius:20px; color:var(--muted)}
.jump a:hover{border-color:var(--accent); color:var(--accent)}

/* top nav / tabs */
.topnav{border-bottom:1px solid var(--rule); background:#fff; position:sticky; top:0; z-index:30}
.topnav-in{max-width:var(--maxw); margin:0 auto; padding:0 22px; height:52px; display:flex; align-items:center; gap:20px}
.topnav .site{font-family:Georgia,serif; font-weight:700; font-size:.95rem; color:var(--ink)}
.topnav .tabs{margin-left:auto; display:flex; gap:6px}
.topnav .tab{font-size:.86rem; text-decoration:none; padding:6px 14px; border-radius:20px; color:var(--muted)}
.topnav .tab:hover{color:var(--accent)}
.topnav .tab.active{background:var(--ink); color:#fff}

/* "how it works" implementation-detail disclosures */
details.howto{border:1px solid var(--rule); border-radius:8px; margin:1.3em 0; background:#fcfbf9}
details.howto>summary{cursor:pointer; list-style:none; padding:11px 16px; font-family:Georgia,serif; font-weight:700;
  font-size:.98rem; color:var(--harness); display:flex; align-items:center; gap:9px}
details.howto>summary::-webkit-details-marker{display:none}
details.howto>summary::before{content:"\25B8"; color:var(--faint); font-size:.85em; transition:transform .12s}
details.howto[open]>summary::before{transform:rotate(90deg)}
details.howto>div{padding:0 16px 6px; border-top:1px solid var(--rule)}
details.howto p{font-size:.96rem; margin:.9em 0}
details.howto code{font-size:.84em}

/* reference tables */
.tblwrap{overflow-x:auto; margin:1em 0}
table.ref{width:100%; border-collapse:collapse; font-size:.9rem}
table.ref th{text-align:right; font-family:Georgia,serif; font-size:.82rem; color:var(--muted);
  border-bottom:2px solid var(--rule); padding:7px 10px; white-space:nowrap}
table.ref th.l{text-align:left}
table.ref td{padding:8px 10px; border-bottom:1px solid var(--rule); vertical-align:top; text-align:left}
table.ref td.num{text-align:right; font-variant-numeric:tabular-nums; color:var(--muted); white-space:nowrap}
table.ref td.tname{font-family:ui-monospace,Menlo,monospace; font-size:.85rem; font-weight:700; color:var(--harness); white-space:nowrap}
table.ref td.args{font-size:.82rem; color:var(--muted)}
table.ref td.args code{background:var(--panel); font-size:.9em; margin-right:2px}
table.ref tr.grouprow td{background:var(--panel); font-family:Georgia,serif; font-weight:700; font-size:.82rem;
  text-transform:uppercase; letter-spacing:.04em; color:var(--muted); border-bottom:1px solid var(--rule)}
table.ref tr.off td{opacity:.62}
table.ref tr.totalrow td{border-top:2px solid var(--rule); font-weight:700}
table.ref tr.totalrow td.tname, table.ref tr.totalrow td.num{color:var(--ink)}

/* viewer call-to-action */
.viewer-cta{display:block; text-decoration:none; background:var(--ink); color:#fff; border-radius:12px;
  padding:20px 24px; margin:1.4em 0; transition:transform .12s, box-shadow .12s}
.viewer-cta:hover{transform:translateY(-2px); box-shadow:0 8px 22px rgba(0,0,0,.14)}
.viewer-cta .cta-eyebrow{display:block; font-family:Georgia,serif; font-size:.74rem; text-transform:uppercase;
  letter-spacing:.08em; color:var(--accent); margin-bottom:4px}
.viewer-cta .cta-title{display:block; font-family:Georgia,serif; font-size:1.4rem; margin-bottom:5px}
.viewer-cta .cta-sub{display:block; color:#d8d8d2; font-size:.92rem}