:root{
  color-scheme:dark;
  --bg:#06090f; --panel:rgba(9,14,23,.84); --panel-solid:#0b111b; --line:rgba(150,185,215,.16);
  --ink:#e9eff6; --muted:#8fa2b7; --dim:#5d6f83;
  --air:#5fe3f2; --mech:#f3b64a; --fluid:#7d95ff; --neural:#ff5c8a; --ok:#58d38c; --bad:#ff8a5c;
  --serif:"Instrument Serif",Georgia,"Times New Roman",serif;
  --sans:"Instrument Sans",system-ui,-apple-system,"Segoe UI",sans-serif;
  --mono:"JetBrains Mono",ui-monospace,Menlo,Consolas,monospace;
}
*{box-sizing:border-box}
[hidden]{display:none!important}
html,body{height:100%}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--sans);font-size:14.5px;line-height:1.5;-webkit-text-size-adjust:100%;overflow:hidden}
button,select,input{font:inherit;color:inherit}
button:focus-visible,select:focus-visible,input:focus-visible,a:focus-visible{outline:2px solid var(--air);outline-offset:2px}

.app{position:relative;height:100%;height:100dvh}
.stage{position:absolute;inset:0;z-index:0;overflow:hidden;background:radial-gradient(120% 90% at 40% 45%,#0d1624 0%,#06090f 70%)}
.stage canvas{display:block;width:100%;height:100%;touch-action:none}
.labels-layer{position:absolute;inset:0;pointer-events:none}

/* overlays stack above the 3D stage and its labels */
.brand,.chapters,.side,.dock{z-index:2}

/* brand */
.brand{position:absolute;left:24px;text-shadow:0 1px 12px rgba(0,0,0,.8);top:calc(env(safe-area-inset-top,0px) + 18px);max-width:340px;pointer-events:none}
.brand h1{font-family:var(--serif);font-weight:400;font-size:40px;line-height:1;margin:4px 0 6px;letter-spacing:-.01em}
.brand p{margin:0;color:var(--muted);font-size:13.5px}
.brand .back{pointer-events:auto;font-family:var(--mono);font-size:11px;letter-spacing:.08em;text-transform:uppercase;color:var(--air);text-decoration:none}
.brand .back::before{content:"← "}

/* chapters */
.chapters{position:absolute;left:16px;top:146px;display:flex;flex-direction:column;gap:2px;max-height:calc(100% - 330px);overflow:auto;scrollbar-width:none;background:var(--panel);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);border:1px solid var(--line);border-radius:12px;padding:6px}
.chapters button{display:flex;gap:10px;align-items:baseline;background:none;border:0;padding:6px 10px;border-radius:6px;cursor:pointer;text-align:left;color:var(--muted);white-space:nowrap}
.chapters button .n{font-family:var(--mono);font-size:11px;color:var(--dim);width:18px}
.chapters button:hover{color:var(--ink);background:rgba(255,255,255,.04)}
.chapters button[aria-current="step"]{color:var(--ink);background:rgba(95,227,242,.08)}
.chapters button[aria-current="step"] .n{color:var(--air)}
.chapters button .dot{width:6px;height:6px;border-radius:50%;background:currentColor;opacity:.0;align-self:center}
.chapters button[aria-current="step"] .dot{opacity:1;background:var(--sig,var(--air))}

/* right column */
.side{position:absolute;right:16px;top:calc(env(safe-area-inset-top,0px) + 16px);bottom:16px;width:380px;display:flex;flex-direction:column;gap:12px;overflow:auto;scrollbar-width:thin;pointer-events:none}
.side>*{pointer-events:auto}
.card,.panel{background:var(--panel);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);border:1px solid var(--line);border-radius:12px;padding:16px 18px}
.card .kicker{font-family:var(--mono);font-size:11px;letter-spacing:.09em;text-transform:uppercase;color:var(--sig,var(--air));display:flex;gap:8px;align-items:center}
.card .kicker::before{content:"";width:22px;height:2px;background:currentColor;border-radius:2px}
.card h2{font-family:var(--serif);font-weight:400;font-size:30px;line-height:1.08;margin:6px 0 10px;text-wrap:balance}
.card p{margin:0 0 10px;color:#cfd9e4}
.card p:last-child{margin-bottom:0}
.card .facts{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px;margin:12px 0}
.card .fact{border:1px solid var(--line);border-radius:8px;padding:7px 9px}
.card .fact b{display:block;font-family:var(--mono);font-weight:500;font-size:15px;color:var(--ink);font-variant-numeric:tabular-nums}
.card .fact span{font-size:11.5px;color:var(--muted);line-height:1.3;display:block}
.card .lens{margin-top:12px;border-left:2px solid var(--bad);padding:6px 0 6px 12px;font-size:13.5px;color:#f0d9cf}
.card .lens.ok{border-color:var(--dim);color:var(--muted)}
.card .lens b{font-family:var(--mono);font-weight:500;font-size:10.5px;letter-spacing:.08em;text-transform:uppercase;display:block;color:var(--bad);margin-bottom:2px}
.card .lens.ok b{color:var(--dim)}

.panel-head{display:flex;justify-content:space-between;align-items:baseline;gap:8px;margin:2px 0 8px}
.panel-head:not(:first-child){margin-top:14px}
.panel h3{margin:0;font-family:var(--mono);font-weight:500;font-size:11px;letter-spacing:.09em;text-transform:uppercase;color:var(--muted)}
.chip-note{font-family:var(--mono);font-size:11px;color:var(--dim);font-variant-numeric:tabular-nums}
.ladder{display:flex;flex-direction:column;gap:7px}
.rung{display:grid;grid-template-columns:104px minmax(0,1fr) 62px;gap:8px;align-items:center;font-size:12.5px}
.rung .k{color:var(--muted)}
.rung .bar{height:6px;border-radius:3px;background:rgba(255,255,255,.06);overflow:hidden}
.rung .bar i{display:block;height:100%;border-radius:3px;transition:width .5s ease}
.rung .v{font-family:var(--mono);font-size:12px;text-align:right;font-variant-numeric:tabular-nums}
#abr{display:block;width:100%;height:120px}
.battery{margin:0;display:grid;grid-template-columns:auto minmax(0,1fr);gap:6px 12px;font-size:12.5px}
.battery dt{color:var(--muted)}
.battery dd{margin:0;color:var(--ink)}

/* dock */
.dock{position:absolute;left:50%;transform:translateX(-50%);bottom:calc(env(safe-area-inset-bottom,0px) + 14px);width:min(640px,calc(100% - 820px));min-width:520px;background:var(--panel);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);border:1px solid var(--line);border-radius:14px;padding:10px 12px;display:flex;flex-direction:column;gap:8px}
.dock-row{display:flex;gap:8px;align-items:center}
.dock-row.wrap{flex-wrap:wrap}
.btn{border:1px solid var(--line);background:rgba(255,255,255,.03);border-radius:8px;padding:7px 12px;cursor:pointer;font-size:13.5px;min-height:36px}
.btn:hover{border-color:rgba(95,227,242,.5)}
.btn.primary{background:var(--air);border-color:var(--air);color:#04121a;font-weight:600;min-width:84px}
.btn.icon{width:36px;padding:0;font-size:20px;line-height:1}
.btn.ghost[aria-pressed="true"]{border-color:var(--air);color:var(--air)}
.seg{display:flex;flex-wrap:wrap;gap:4px;flex:1}
.seg button{flex:1;min-width:48px;border:1px solid var(--line);background:transparent;border-radius:7px;padding:6px 6px;cursor:pointer;font-family:var(--mono);font-size:12px;min-height:34px}
.seg button[aria-pressed="true"]{border-color:var(--sig,var(--air));color:#04121a;background:var(--sig,var(--air));font-weight:500}
.field{display:flex;align-items:center;gap:8px;font-size:12.5px;color:var(--muted)}
.field.grow{flex:1 1 220px}
.field input[type=range]{flex:1;accent-color:var(--air);min-width:80px}
.field output{font-family:var(--mono);font-size:12px;color:var(--ink);min-width:78px;text-align:right}
.field{min-width:0}
.field select{flex:1;min-width:0;width:100%;max-width:100%;text-overflow:ellipsis;background:var(--panel-solid);border:1px solid var(--line);border-radius:7px;padding:7px 8px;color:var(--ink);font-size:13px}
.toggles{gap:14px;font-size:12.5px;color:var(--muted)}
.tg{display:flex;gap:6px;align-items:center;cursor:pointer}
.tg input[type=checkbox]{accent-color:var(--air)}
.tg input[type=range]{width:90px;accent-color:var(--air)}

/* labels */
.tag{font-family:var(--mono);font-size:11px;letter-spacing:.02em;color:var(--ink);white-space:nowrap;transition:opacity .35s ease;pointer-events:none}
.tag .in{display:flex;align-items:center;gap:6px;transform:translate(calc(50% + 6px),0)}
.tag .in::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--c,var(--air));box-shadow:0 0 8px var(--c,var(--air))}
.tag .in span{background:rgba(6,10,17,.72);border:1px solid rgba(150,185,215,.18);padding:2px 6px;border-radius:4px}
.tag.hot .in span{border-color:var(--c);color:var(--c)}

/* loader + hint */
.loader{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;color:var(--muted);font-family:var(--mono);font-size:12px;background:var(--bg);z-index:5;transition:opacity .6s ease}
.loader.done{opacity:0;pointer-events:none}
.loader-ring{width:44px;height:44px;border-radius:50%;border:2px solid rgba(95,227,242,.15);border-top-color:var(--air);animation:spin 1s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}
.hint{position:absolute;left:50%;transform:translateX(-50%);top:calc(env(safe-area-inset-top,0px) + 14px);font-family:var(--mono);font-size:11px;color:var(--dim);transition:opacity .8s ease;pointer-events:none}
@media (prefers-reduced-motion:reduce){.loader-ring{animation:none}}

/* medium desktop: narrower side */
@media (max-width:1280px){.side{width:340px}.dock{width:auto;left:230px;right:372px;transform:none;min-width:0}}

/* phones & tablets: stacked, page scrolls */
@media (max-width:900px){
  body{overflow:auto}
  .app{height:auto;display:flex;flex-direction:column}
  .stage{position:relative;inset:auto;height:58svh;min-height:340px;order:1}
  .brand{position:relative;left:auto;top:auto;order:0;padding:calc(env(safe-area-inset-top,0px) + 12px) 16px 10px;max-width:none;pointer-events:auto}
  .brand h1{font-size:32px}
  .chapters{position:sticky;top:0;z-index:3;left:auto;order:2;flex-direction:row;overflow-x:auto;max-height:none;padding:8px 12px;background:var(--bg);border-bottom:1px solid var(--line)}
  .chapters button{padding:6px 10px;border:1px solid var(--line)}
  .chapters button .dot{display:none}
  .dock{position:relative;order:3;left:auto;right:auto;bottom:auto;transform:none;width:auto;min-width:0;margin:12px 12px 0}
  .side{position:relative;order:4;right:auto;top:auto;bottom:auto;width:auto;overflow:visible;padding:12px 12px calc(env(safe-area-inset-bottom,0px) + 24px)}
  .card h2{font-size:27px}
  .hint{top:auto;bottom:10px}
}
@media (max-width:420px){
  .rung{grid-template-columns:86px minmax(0,1fr) 56px}
  .seg button{min-width:40px;font-size:11.5px}
}
.credit{margin:14px 0 0;font-size:11.5px;color:var(--dim);line-height:1.45}
:root{--elec:#b8f36a}
.pill{display:inline-flex;align-items:center;gap:6px;font-family:var(--mono);font-size:10.5px;letter-spacing:.06em;text-transform:uppercase;padding:3px 8px;border-radius:999px;border:1px solid currentColor;white-space:nowrap}
.pill::before{content:"";width:6px;height:6px;border-radius:50%;background:currentColor}
.pill.F{color:#58d38c}.pill.S{color:#5fe3f2}.pill.C{color:#f3b64a}.pill.N{color:#8a6f6a}
.card .status{display:flex;flex-wrap:wrap;gap:8px;align-items:center;margin:0 0 12px;font-size:13px;color:var(--muted)}
.card .why{font-size:13.5px;color:#d8e2ec;border-left:2px solid var(--line);padding:4px 0 4px 12px;margin:10px 0 0}
.sub{display:flex;flex-wrap:wrap;gap:6px;margin:4px 0 12px}
.sub button{border:1px solid var(--line);background:transparent;border-radius:7px;padding:6px 10px;cursor:pointer;font-family:var(--mono);font-size:12px;min-height:34px}
.sub button[aria-pressed="true"]{background:var(--sig,var(--air));border-color:var(--sig,var(--air));color:#04121a}
.chain{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:0}
.chain li{display:grid;grid-template-columns:14px minmax(0,1fr) auto;gap:10px;align-items:center;font-size:13px;padding:5px 0;position:relative;color:#cfd9e4;transition:color .3s}
.chain li::before{content:"";width:10px;height:10px;border-radius:50%;background:var(--c);box-shadow:0 0 0 3px rgba(0,0,0,.4);z-index:1}
.chain li:not(:last-child)::after{content:"";position:absolute;left:4px;top:19px;height:calc(100% - 10px);width:2px;background:rgba(150,185,215,.18)}
.chain li span{font-family:var(--mono);font-size:10.5px;color:var(--dim);text-transform:uppercase;letter-spacing:.05em}
.chain li.on{color:var(--ink)}
.chain li.on::before{box-shadow:0 0 0 3px rgba(0,0,0,.4),0 0 12px var(--c)}
#proc{display:block;width:100%;height:150px}
.cand{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:4px}
.cand li button{width:100%;display:flex;justify-content:space-between;align-items:center;gap:10px;background:transparent;border:1px solid transparent;border-radius:8px;padding:6px 8px;cursor:pointer;text-align:left;font-size:13px}
.cand li button:hover{border-color:var(--line)}
.cand li button[aria-current="true"]{border-color:var(--line);background:rgba(255,255,255,.03)}
.cand-why{margin:0 0 10px;font-size:13px;color:#cfd9e4}
.matrix{width:100%;border-collapse:collapse;font-size:12.5px;margin-top:8px}
.matrix th,.matrix td{padding:5px 6px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
.matrix th{font-family:var(--mono);font-weight:500;font-size:10.5px;color:var(--muted);letter-spacing:.05em;text-transform:uppercase}
.table-wrap{overflow-x:auto}
@media (min-width:901px){.chapters{top:178px}}

/* ---- lab additions ---- */
.chapters{top:178px}
.brand{max-width:380px}
.kn{font-family:"Noto Sans Kannada","Instrument Sans",sans-serif}
.panel canvas{display:block;width:100%}
.overlay{position:absolute;inset:0;pointer-events:none;z-index:1}
.overlay.vfss{background:repeating-radial-gradient(circle at 30% 40%,rgba(0,0,0,.03) 0 1px,transparent 1px 3px);mix-blend-mode:multiply}
.overlay.vfss::after{content:attr(data-stamp);position:absolute;left:14px;bottom:14px;font-family:var(--mono);font-size:11px;color:#1c1f24;letter-spacing:.08em}
.overlay.fees{background:radial-gradient(circle at 50% 50%,transparent 0 34%,#000 35.5%)}
.overlay.fees::after{content:attr(data-stamp);position:absolute;left:50%;transform:translateX(-50%);top:14px;font-family:var(--mono);font-size:11px;color:#9fb0c2;letter-spacing:.08em}
.overlay .white{position:absolute;inset:0;background:#fff;opacity:0}
.grid-ph{display:grid;grid-template-columns:repeat(auto-fill,minmax(44px,1fr));gap:4px}
.grid-ph button{border:1px solid var(--line);background:transparent;border-radius:7px;padding:5px 2px;cursor:pointer;min-height:44px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:1px;line-height:1.05}
.grid-ph button b{font-size:17px;font-weight:600}
.grid-ph button span{font-family:var(--mono);font-size:10px;color:var(--muted)}
.grid-ph button[aria-pressed="true"]{border-color:var(--sig,var(--air));background:rgba(95,227,242,.12)}
.grid-ph .grp{grid-column:1/-1;font-family:var(--mono);font-size:10.5px;letter-spacing:.07em;text-transform:uppercase;color:var(--dim);margin-top:6px}
.kv{display:grid;grid-template-columns:auto minmax(0,1fr);gap:5px 12px;font-size:12.5px;margin:0}
.kv dt{color:var(--muted)} .kv dd{margin:0}
.bars{display:flex;flex-direction:column;gap:6px}
.bar-row{display:grid;grid-template-columns:110px minmax(0,1fr) 40px;gap:8px;align-items:center;font-size:12.5px}
.bar-row .b{height:7px;border-radius:4px;background:rgba(255,255,255,.07);overflow:hidden}
.bar-row .b i{display:block;height:100%;border-radius:4px;transition:width .5s}
.bar-row .v{font-family:var(--mono);font-size:11.5px;text-align:right}
.scale{display:flex;gap:3px;margin:4px 0 10px}
.scale span{flex:1;text-align:center;font-family:var(--mono);font-size:10.5px;padding:4px 0;border-radius:4px;background:rgba(255,255,255,.05);color:var(--dim)}
.scale span.on{background:var(--c,var(--bad));color:#06090f;font-weight:600}
.note{font-size:12.5px;color:var(--muted);margin:8px 0 0}
.audio-row{display:flex;gap:8px;align-items:center;flex-wrap:wrap;margin:6px 0 10px}
.tabs{display:flex;gap:4px;margin-bottom:8px}
.tabs button{flex:1;border:1px solid var(--line);background:transparent;border-radius:7px;padding:6px;cursor:pointer;font-size:12.5px}
.tabs button[aria-pressed="true"]{background:var(--sig,var(--air));color:#04121a;border-color:transparent;font-weight:600}
@media (max-width:900px){.chapters{top:0}}
@media (max-width:900px){.tag{font-size:10px}.tag .in span{padding:1px 5px}}