:root{--ground:#f6f7f8;--raised:#ffffff;--sunk:#ecEEF0;--ink:#14181d;--muted:#646d77;--hairline:#dcE1E5;--gold:#0f766e;--gold-flat:#14b8a6;--gold-wash:rgba(20,184,166,0.1);--critical:#9c3b28;--warn:#8a6a1c;--good:#3f6b47;--bar-idle:#d6dbdf;--serif:"Segoe UI",Inter,system-ui,-apple-system,sans-serif;--sans:"Segoe UI",Inter,system-ui,-apple-system,sans-serif;--mono:ui-monospace,"Cascadia Mono",Consolas,"SF Mono",Menlo,monospace;--h-weight:600;--h-tracking:-0.02em;--pad:20px;--read:760px;--wide:1180px;--speed:160ms}@media (prefers-color-scheme:dark){:root{--ground:#0f1215;--raised:#171b20;--sunk:#0b0e11;--ink:#eef1f4;--muted:#97a1ab;--hairline:#262c33;--gold:#2dd4bf;--gold-flat:#2dd4bf;--gold-wash:rgba(45,212,191,0.1);--critical:#d1614a;--warn:#c9a13f;--good:#7f9c72;--bar-idle:#2b3138}}:root[data-theme=dark]{--ground:#0f1215;--raised:#171b20;--sunk:#0b0e11;--ink:#eef1f4;--muted:#97a1ab;--hairline:#262c33;--gold:#2dd4bf;--gold-flat:#2dd4bf;--gold-wash:rgba(45,212,191,0.1);--critical:#d1614a;--warn:#c9a13f;--good:#7f9c72;--bar-idle:#2b3138}:root[data-theme=light]{--ground:#f6f7f8;--raised:#ffffff;--sunk:#eceef0;--ink:#14181d;--muted:#646d77;--hairline:#dce1e5;--gold:#0f766e;--gold-flat:#14b8a6;--gold-wash:rgba(20,184,166,0.1);--critical:#9c3b28;--warn:#8a6a1c;--good:#3f6b47;--bar-idle:#d6dbdf}:root[data-brand=gold]{--ground:#f7f4ec;--raised:#fffdf7;--sunk:#efe9db;--ink:#0a0a0b;--muted:#8a8378;--hairline:#ddd6c4;--gold:#a8842a;--gold-flat:#d4af37;--gold-wash:rgba(212,175,55,0.13);--critical:#9c3b28;--warn:#8a6a1c;--good:#4a6741;--bar-idle:#cfc7b4;--serif:Georgia,"Palatino Linotype",Palatino,"Book Antiqua",serif;--h-weight:400;--h-tracking:-0.02em}@media (prefers-color-scheme:dark){:root[data-brand=gold]{--ground:#0a0a0b;--raised:#131315;--sunk:#08080a;--ink:#f4f2ee;--muted:#a09a90;--hairline:#26241f;--gold:#d4af37;--gold-flat:#d4af37;--gold-wash:rgba(212,175,55,0.1);--critical:#d1614a;--warn:#c9a13f;--good:#7f9c72;--bar-idle:#2e2c27}}:root[data-brand=gold][data-theme=dark]{--ground:#0a0a0b;--raised:#131315;--sunk:#08080a;--ink:#f4f2ee;--muted:#a09a90;--hairline:#26241f;--gold:#d4af37;--gold-flat:#d4af37;--gold-wash:rgba(212,175,55,0.1);--critical:#d1614a;--warn:#c9a13f;--good:#7f9c72;--bar-idle:#2e2c27}:root[data-brand=gold][data-theme=light]{--ground:#f7f4ec;--raised:#fffdf7;--sunk:#efe9db;--ink:#0a0a0b;--muted:#8a8378;--hairline:#ddd6c4;--gold:#a8842a;--gold-flat:#d4af37;--gold-wash:rgba(212,175,55,0.13);--critical:#9c3b28;--warn:#8a6a1c;--good:#4a6741;--bar-idle:#cfc7b4}:root[data-brand=cohort]{--ground:#f4f3ed;--raised:#ffffff;--sunk:#e8e9e0;--ink:#0c3227;--muted:#5d7168;--hairline:#d5d8cc;--gold:#5c7d10;--gold-flat:#a8d33a;--gold-wash:rgba(168,211,58,0.16);--critical:#a33a26;--warn:#8a6a1c;--good:#2f6b45;--bar-idle:#ccd0c2;--serif:"Segoe UI",Inter,system-ui,-apple-system,sans-serif;--h-weight:700;--h-tracking:-0.03em}@media (prefers-color-scheme:dark){:root[data-brand=cohort]{--ground:#0b2f26;--raised:#103c30;--sunk:#07231c;--ink:#f1f6ee;--muted:#9cb9ab;--hairline:#1c5344;--gold:#c4f042;--gold-flat:#c4f042;--gold-wash:rgba(196,240,66,0.12);--critical:#e0785f;--warn:#d9be55;--good:#7fc48f;--bar-idle:#1b4a3a}}:root[data-brand=cohort][data-theme=dark]{--ground:#0b2f26;--raised:#103c30;--sunk:#07231c;--ink:#f1f6ee;--muted:#9cb9ab;--hairline:#1c5344;--gold:#c4f042;--gold-flat:#c4f042;--gold-wash:rgba(196,240,66,0.12);--critical:#e0785f;--warn:#d9be55;--good:#7fc48f;--bar-idle:#1b4a3a}:root[data-brand=cohort][data-theme=light]{--ground:#f4f3ed;--raised:#ffffff;--sunk:#e8e9e0;--ink:#0c3227;--muted:#5d7168;--hairline:#d5d8cc;--gold:#5c7d10;--gold-flat:#a8d33a;--gold-wash:rgba(168,211,58,0.16);--critical:#a33a26;--warn:#8a6a1c;--good:#2f6b45;--bar-idle:#ccd0c2}:root:lang(ur),:root[lang=ur]{--serif:"Noto Nastaliq Urdu","Jameel Noori Nastaleeq","Urdu Typesetting","Noto Naskh Arabic","Segoe UI",system-ui,sans-serif;--sans:"Noto Nastaliq Urdu","Jameel Noori Nastaleeq","Urdu Typesetting","Noto Naskh Arabic","Segoe UI",system-ui,sans-serif;--h-weight:600;--h-tracking:0;line-height:1.9}[lang=ur] body{line-height:1.9;font-size:17px}[lang=ur] h1,[lang=ur] h2,[lang=ur] h3{line-height:1.5}[lang=ur] .lesson dt,[lang=ur] .stamp,[lang=ur] th{letter-spacing:0;font-family:var(--sans);font-size:12px}[lang=ur] .tag{letter-spacing:0;font-family:var(--sans);font-size:11px}[lang=ur] .figure,[lang=ur] .kv-v,[lang=ur] .leak-cost,[lang=ur] .tile-figure,[lang=ur] input[type=date],[lang=ur] input[type=text],[lang=ur] td.num{direction:ltr;text-align:end}[lang=ur] .money-input input{direction:ltr;text-align:start}*,:after,:before{box-sizing:border-box}html{-webkit-text-size-adjust:100%}body{margin:0;background:var(--ground);color:var(--ink);font-family:var(--sans);font-size:16px;line-height:1.55;-webkit-font-smoothing:antialiased;overflow-x:hidden}h1,h2,h3{font-family:var(--serif);font-weight:var(--h-weight);letter-spacing:var(--h-tracking);line-height:1.15;margin:0;text-wrap:balance}h1{font-size:clamp(30px,6vw,44px)}h2{font-size:clamp(22px,4vw,28px)}h3{font-size:19px}p{margin:0 0 14px;max-width:68ch}a{color:var(--gold);text-underline-offset:3px}:focus-visible{outline:2px solid var(--gold);outline-offset:3px;border-radius:2px}.wrap{max-width:var(--read);margin-inline:auto;padding:28px var(--pad) 96px}.wide{max-width:var(--wide)}.stack{gap:24px}.stack,.stack-sm{display:flex;flex-direction:column}.stack-sm{gap:12px}.cards{display:grid;grid-gap:14px;gap:14px;grid-template-columns:1fr}@media (min-width:780px){:root{--pad:32px}.cards-2{grid-template-columns:repeat(2,minmax(0,1fr))}.cards-3{grid-template-columns:repeat(3,minmax(0,1fr))}.cards-4{grid-template-columns:repeat(2,minmax(0,1fr))}}@media (min-width:1080px){.cards-4{grid-template-columns:repeat(4,minmax(0,1fr))}.split{display:grid;grid-template-columns:minmax(0,1.45fr) minmax(0,1fr);grid-gap:24px;gap:24px;align-items:start}}.stamp{font-family:var(--mono);font-size:10.5px;letter-spacing:.16em;text-transform:uppercase;margin:0}.muted,.stamp{color:var(--muted)}.small{font-size:14px}.serif{font-family:var(--serif)}.rule{border:0;-webkit-border-before:1px solid var(--hairline);border-block-start:1px solid var(--hairline);margin:28px 0}.topbar{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:12px var(--pad);-webkit-border-after:1px solid var(--hairline);border-block-end:1px solid var(--hairline);max-width:var(--wide);margin-inline:auto;flex-wrap:nowrap}.logo{font-family:var(--serif);font-size:22px;font-weight:var(--h-weight);letter-spacing:var(--h-tracking);text-decoration:none;color:var(--ink)}.logo em{font-style:normal;color:var(--gold)}.navlinks{display:flex;gap:14px;align-items:center;font-size:14px;flex-wrap:nowrap;overflow-x:auto;scrollbar-width:none;-webkit-overflow-scrolling:touch;min-width:0}.navlinks::-webkit-scrollbar{display:none}.navlinks a{color:var(--muted);text-decoration:none;white-space:nowrap}.navlinks a:hover,.navlinks a[aria-current=page]{color:var(--ink)}.navlinks a[aria-current=page]{-webkit-border-after:2px solid var(--gold-flat);border-block-end:2px solid var(--gold-flat)}.footer{-webkit-border-before:1px solid var(--hairline);border-block-start:1px solid var(--hairline);-webkit-margin-before:60px;margin-block-start:60px;padding:30px var(--pad) 50px;max-width:var(--wide);margin-inline:auto}.footer-cols{display:grid;grid-gap:26px;gap:26px;grid-template-columns:1fr}@media (min-width:620px){.footer-cols{grid-template-columns:repeat(4,minmax(0,1fr))}}.footer h4{font-family:var(--mono);font-size:10px;letter-spacing:.16em;text-transform:uppercase;color:var(--muted);font-weight:400;margin:0 0 10px}.footer ul{list-style:none;margin:0;padding:0}.footer li{-webkit-margin-after:7px;margin-block-end:7px}.footer a{color:var(--ink);text-decoration:none;font-size:14.5px}.footer a:hover{color:var(--gold)}.footer-note{-webkit-margin-before:26px;margin-block-start:26px;-webkit-padding-before:18px;padding-block-start:18px;-webkit-border-before:1px solid var(--hairline);border-block-start:1px solid var(--hairline);color:var(--muted);font-size:13px}.card{background:var(--raised);border:1px solid var(--hairline);border-radius:3px;padding:20px}.card-critical{-webkit-border-start:3px solid var(--critical);border-inline-start:3px solid var(--critical)}.card-gold{-webkit-border-start:3px solid var(--gold-flat);border-inline-start:3px solid var(--gold-flat)}.kv{display:flex;justify-content:space-between;gap:16px;padding:9px 0;-webkit-border-after:1px solid var(--hairline);border-block-end:1px solid var(--hairline)}.kv:last-child{-webkit-border-after:0;border-block-end:0}.kv-k{color:var(--muted);font-size:14px}.kv-v{font-feature-settings:"tnum";font-variant-numeric:tabular-nums;text-align:end}.kv-hero .kv-v{font-size:22px;color:var(--gold)}.figure{font-family:var(--serif);font-size:clamp(28px,6vw,40px);line-height:1.05;font-feature-settings:"tnum";font-variant-numeric:tabular-nums;font-weight:var(--h-weight)}.dash{color:var(--muted);font-family:var(--serif)}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font:inherit;font-size:15px;padding:13px 22px;min-height:46px;border-radius:3px;border:1px solid var(--ink);background:var(--ink);color:var(--ground);cursor:pointer;text-decoration:none;transition:opacity var(--speed) ease}.btn:hover{opacity:.85}.btn-ghost{color:var(--ink);border-color:var(--hairline)}.btn-ghost,.btn-quiet{background:transparent}.btn-quiet{border-color:transparent;color:var(--muted);padding-inline:0;min-height:40px}.btn-quiet:hover{color:var(--ink)}.btn-sm{font-size:13px;padding:7px 12px;min-height:36px}.btn:disabled{opacity:.4;cursor:not-allowed}.btnrow{display:flex;gap:10px;flex-wrap:wrap;align-items:center}label{display:block;font-size:14px;-webkit-margin-after:6px;margin-block-end:6px}.field{-webkit-margin-after:18px;margin-block-end:18px}.hint{color:var(--muted);font-size:13px;-webkit-margin-before:5px;margin-block-start:5px}input[type=date],input[type=number],input[type=text],select,textarea{width:100%;font:inherit;font-feature-settings:"tnum";font-variant-numeric:tabular-nums;padding:12px 13px;min-height:46px;color:var(--ink);background:var(--ground);border:1px solid var(--hairline);border-radius:3px}input:focus,select:focus,textarea:focus{border-color:var(--gold)}.money-input{display:flex;align-items:stretch}.money-input .cur{display:inline-flex;align-items:center;padding-inline:12px;font-family:var(--mono);font-size:12px;letter-spacing:.08em;color:var(--muted);background:var(--sunk);border:1px solid var(--hairline);-webkit-border-end:0;border-inline-end:0;border-start-start-radius:3px;border-end-start-radius:3px}.money-input input{border-start-start-radius:0;border-end-start-radius:0}.choice{display:flex;gap:12px;align-items:flex-start;padding:15px;border:1px solid var(--hairline);border-radius:3px;background:var(--raised);cursor:pointer;-webkit-margin-after:10px;margin-block-end:10px}.choice input{-webkit-margin-before:3px;margin-block-start:3px;accent-color:var(--gold-flat);width:18px;height:18px;flex:none}.choice[data-on=true]{border-color:var(--gold-flat);background:var(--gold-wash)}.choice-title{font-weight:600;font-size:15px}.choice-sub{color:var(--muted);font-size:13.5px}.lesson{background:var(--sunk);-webkit-border-start:3px solid var(--gold-flat);border-inline-start:3px solid var(--gold-flat);padding:18px 18px 6px;border-radius:3px;-webkit-margin-after:26px;margin-block-end:26px}.lesson h3{font-size:17px;-webkit-margin-after:10px;margin-block-end:10px}.lesson dt{font-family:var(--mono);font-size:10px;letter-spacing:.16em;text-transform:uppercase;color:var(--muted);-webkit-margin-before:12px;margin-block-start:12px}.lesson dd{margin:3px 0 0}.lesson dl{margin:0 0 14px}.lesson .example{font-family:var(--serif)}.lesson-folded{padding-block:12px 14px}.lesson-folded>summary{cursor:pointer;font-weight:600;font-size:15px;list-style-position:inside}.lesson-folded>summary::marker{color:var(--gold)}.lesson-folded[open]>summary{-webkit-margin-after:10px;margin-block-end:10px}.door{display:block;text-decoration:none;color:inherit;transition:border-color var(--speed),transform var(--speed)}.door:focus-visible,.door:hover{border-color:var(--gold);transform:translateY(-2px)}.door h3{font-size:18px}@media (prefers-reduced-motion:reduce){.door{transition:none}.door:focus-visible,.door:hover{transform:none}}.rail{display:flex;gap:4px;-webkit-margin-after:22px;margin-block-end:22px}.rail span{height:3px;flex:1 1;background:var(--bar-idle);border-radius:2px}.rail span[data-on=true]{background:var(--gold-flat)}.rail span[data-skipped=true]{background:repeating-linear-gradient(135deg,var(--bar-idle) 0 3px,transparent 3px 6px)}.bar{height:26px;background:var(--bar-idle);border-radius:2px;overflow:hidden;position:relative}.bar i{display:block;height:100%;background:var(--gold-flat)}.bar[data-state=hatched] i{background:repeating-linear-gradient(135deg,var(--muted) 0 5px,transparent 5px 10px)}.bar[data-severity=critical] i{background:var(--critical)}.bar[data-state=hatched][data-severity=critical] i{background:repeating-linear-gradient(135deg,var(--critical) 0 5px,transparent 5px 10px)}.bar-sm{height:8px}.leak{padding:14px 0;-webkit-border-after:1px solid var(--hairline);border-block-end:1px solid var(--hairline)}.leak:last-child{-webkit-border-after:0;border-block-end:0}.leak-head{display:flex;justify-content:space-between;gap:14px;align-items:baseline;-webkit-margin-after:7px;margin-block-end:7px}.leak-cost{font-feature-settings:"tnum";font-variant-numeric:tabular-nums;white-space:nowrap}.ring{box-shadow:0 0 0 2px var(--gold-flat);border-radius:3px;padding:12px;margin-inline:-12px}.step{display:grid;grid-template-columns:26px 1fr;grid-gap:14px;gap:14px;padding:18px 0;-webkit-border-after:1px solid var(--hairline);border-block-end:1px solid var(--hairline)}.step-num{font-family:var(--mono);font-size:12px;color:var(--muted);-webkit-padding-before:4px;padding-block-start:4px}.step[data-locked=true]{opacity:.45}.step[data-locked=true] .step-body>:not(h3){display:none}.step-meta{display:flex;gap:18px;flex-wrap:wrap;-webkit-margin-before:10px;margin-block-start:10px;font-size:14px}.step-meta b{font-weight:600;font-feature-settings:"tnum";font-variant-numeric:tabular-nums}.tile{background:var(--raised);border:1px solid var(--hairline);border-radius:3px;padding:16px}.tile .stamp{-webkit-margin-after:8px;margin-block-end:8px}.tile-figure{font-family:var(--serif);font-weight:var(--h-weight);font-size:clamp(24px,5vw,32px);line-height:1.05;font-feature-settings:"tnum";font-variant-numeric:tabular-nums;margin:0}.tile-sub{color:var(--muted);font-size:13px;margin:6px 0 0}.todo{display:flex;gap:12px;align-items:flex-start;padding:12px 0;-webkit-border-after:1px solid var(--hairline);border-block-end:1px solid var(--hairline)}.todo:last-of-type{-webkit-border-after:0;border-block-end:0}.todo input[type=checkbox]{width:18px;height:18px;-webkit-margin-before:3px;margin-block-start:3px;accent-color:var(--gold-flat);flex:none}.todo-body{flex:1 1;min-width:0}.todo[data-done=true] .todo-text{text-decoration:line-through;color:var(--muted)}.todo-text{word-break:break-word}.inline-input{border:0;background:transparent;padding:0;min-height:0;font:inherit;color:inherit;width:100%}.inline-input:focus{outline:2px solid var(--gold);outline-offset:2px}.goal+.goal{-webkit-border-before:1px solid var(--hairline);border-block-start:1px solid var(--hairline);-webkit-margin-before:14px;margin-block-start:14px;-webkit-padding-before:14px;padding-block-start:14px}.tablewrap{overflow-x:auto;-webkit-overflow-scrolling:touch}table{border-collapse:collapse;width:100%;font-size:14.5px}td,th{text-align:start;padding:9px 10px;-webkit-border-after:1px solid var(--hairline);border-block-end:1px solid var(--hairline);vertical-align:top}th{font-family:var(--mono);font-size:10px;letter-spacing:.14em;text-transform:uppercase;color:var(--muted);font-weight:400;white-space:nowrap}td.num{text-align:end;font-feature-settings:"tnum";font-variant-numeric:tabular-nums}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}.tag{display:inline-block;font-family:var(--mono);font-size:10px;letter-spacing:.12em;text-transform:uppercase;padding:3px 7px;border:1px solid var(--hairline);border-radius:2px;color:var(--muted)}.tag-critical{color:var(--critical);border-color:var(--critical)}.tag-gold{color:var(--gold);border-color:var(--gold)}.wordmark{font-family:var(--serif);font-size:13px;color:var(--muted);text-align:end;-webkit-margin-before:40px;margin-block-start:40px}@media (prefers-reduced-motion:reduce){*,:after,:before{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}}@media print{:root,:root[data-brand=cohort],:root[data-brand=gold]{--ground:#fff;--raised:#fff;--sunk:#f4f2ee;--ink:#000;--muted:#555;--hairline:#ccc;--gold:#6a5410}.btnrow,.lesson,.no-print,.topbar{display:none!important}.wrap{padding:0;max-width:100%}.card,.tile{border:0;padding:0 0 10px;page-break-inside:avoid;break-inside:avoid}body{font-size:11px}h1{font-size:22px}h2{font-size:15px}h3{font-size:13px}.figure,.tile-figure{font-size:22px}.stack{gap:10px}.cards{grid-template-columns:repeat(2,1fr)!important}a{color:#000;text-decoration:none}}