:root{--paper: #F4EFE4;--ink: #1E2A44;--andon: #E39B2D;--andon-ink: #8A5A10;--steel: #5E7A86;--card: #FBF8F1;--rule: #D9D1C0;--ink-soft: #3A4763;--on-andon: #1E2A44;--on-ink: #F4EFE4;--shadow: 0 18px 50px rgba(30, 42, 68, .18);--f-head: "Bricolage Grotesque", system-ui, sans-serif;--f-read: "Source Serif 4", Georgia, serif;--f-mono: "IBM Plex Mono", ui-monospace, monospace;color-scheme:light}@media (prefers-color-scheme: dark){:root:not([data-theme=light]){--paper: #141A26;--ink: #E6E1D5;--andon: #F0AE48;--andon-ink: #F0AE48;--steel: #8FA7B1;--card: #1B2332;--rule: #2C3648;--ink-soft: #C2C8D4;--on-andon: #141A26;--on-ink: #141A26;--shadow: 0 18px 50px rgba(0, 0, 0, .45);color-scheme:dark}}:root[data-theme=dark]{--paper: #141A26;--ink: #E6E1D5;--andon: #F0AE48;--andon-ink: #F0AE48;--steel: #8FA7B1;--card: #1B2332;--rule: #2C3648;--ink-soft: #C2C8D4;--on-andon: #141A26;--on-ink: #141A26;--shadow: 0 18px 50px rgba(0, 0, 0, .45);color-scheme:dark}*{box-sizing:border-box}html,body{margin:0}body{background:var(--paper);color:var(--ink);font-family:var(--f-read);font-size:17px;line-height:1.6;background-image:linear-gradient(var(--rule) 1px,transparent 1px),linear-gradient(90deg,var(--rule) 1px,transparent 1px);background-size:32px 32px;background-attachment:fixed;-webkit-font-smoothing:antialiased}body:before{content:"";position:fixed;top:0;right:0;bottom:0;left:0;background:var(--paper);opacity:.86;z-index:-1}h1,h2,h3,h4{font-family:var(--f-head);line-height:1.15;margin:0 0 .4em;letter-spacing:-.01em}h1{font-size:clamp(28px,4.4vw,42px)}h2{font-size:clamp(22px,3vw,30px)}h3{font-size:19px}p{margin:0 0 1em}a{color:inherit}button{font:inherit;color:inherit}:focus-visible{outline:3px solid var(--andon);outline-offset:2px;border-radius:6px}.mono,.eyebrow{font-family:var(--f-mono);font-size:12px;letter-spacing:.08em;text-transform:uppercase;color:var(--steel)}.eyebrow{display:block;margin-bottom:6px}.muted{color:var(--steel)}.shell{min-height:100vh;display:flex;flex-direction:column}.topbar{position:sticky;top:0;z-index:20;background:color-mix(in srgb,var(--paper) 92%,transparent);-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);border-bottom:1px solid var(--rule)}.topbar-in{max-width:1120px;margin:0 auto;padding:10px 16px;display:flex;align-items:center;gap:14px}.brand{display:flex;align-items:center;gap:10px;font-family:var(--f-head);font-weight:700;font-size:18px;background:none;border:0;cursor:pointer;padding:4px 0}.brand svg{width:30px;height:30px}.nav{display:flex;gap:4px;margin-left:auto;flex-wrap:wrap}.nav button{display:inline-flex;align-items:center;gap:6px;padding:7px 11px;border-radius:8px;border:1px solid transparent;background:none;cursor:pointer;font-family:var(--f-mono);font-size:12px;text-transform:uppercase;letter-spacing:.06em}.nav button[aria-current=page]{border-color:var(--ink)}.nav button:hover{background:var(--card)}@media (max-width: 640px){.nav .lbl{display:none}.brand .bt{font-size:16px}}main{flex:1;width:100%;max-width:1120px;margin:0 auto;padding:24px 16px 120px}.foot{border-top:1px solid var(--rule);padding:18px 16px 90px;text-align:center;font-size:13px;color:var(--steel)}.card{background:var(--card);border:1px solid var(--rule);border-radius:10px;padding:20px}.grid{display:grid;gap:16px}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:10px 16px;border-radius:9px;border:1.5px solid var(--ink);background:var(--ink);color:var(--on-ink);cursor:pointer;font-family:var(--f-head);font-weight:600;font-size:15px;text-decoration:none}.btn:hover{filter:brightness(1.08)}.btn.ghost{background:transparent;color:var(--ink)}.btn.andon{background:var(--andon);border-color:var(--andon);color:var(--on-andon)}.btn.sm{padding:6px 11px;font-size:13px}.btn:disabled{opacity:.45;cursor:not-allowed}.row{display:flex;gap:10px;align-items:center;flex-wrap:wrap}.spacer{flex:1}.tag{display:inline-block;font-family:var(--f-mono);font-size:11px;letter-spacing:.06em;text-transform:uppercase;padding:3px 8px;border:1px solid var(--rule);border-radius:99px;color:var(--steel)}.tag.on{border-color:var(--andon);color:var(--andon-ink)}.house{width:100%;height:auto;display:block}.hp .hp-shape{stroke:var(--steel);stroke-width:2;fill:var(--card);stroke-dasharray:6 5;transition:fill .3s}.hp-progress .hp-shape{stroke:var(--ink);stroke-dasharray:none;fill:url(#hatch)}.hp-done .hp-shape{stroke:var(--ink);stroke-dasharray:none;fill:var(--ink)}.hp-focus .hp-shape{stroke:var(--andon);stroke-width:3.5;stroke-dasharray:none}.hp-t{font-family:var(--f-mono);font-size:11px;letter-spacing:.04em;text-transform:uppercase;fill:var(--ink);pointer-events:none}.hp-done .hp-t{fill:var(--paper)}.hp-progress .hp-t{fill:var(--ink);paint-order:stroke;stroke:var(--card);stroke-width:4px}.hp-click{cursor:pointer}.hp-click:hover .hp-shape{stroke:var(--andon)}.hp-click:focus-visible{outline:none}.hp-click:focus-visible .hp-shape{stroke:var(--andon);stroke-width:4}.ill-wrap{margin:18px 0 22px;padding:10px;border:1px solid var(--rule);border-radius:10px;background:var(--card)}.ill{width:100%;height:auto;display:block}.ill.small{max-width:220px;margin:0 auto}.ill-house{max-width:380px;margin:0 auto}.ill .ln{stroke:var(--ink);stroke-width:2;fill:none;stroke-linecap:round;stroke-linejoin:round}.ill .ls{stroke:var(--steel);stroke-width:1.5;fill:none;stroke-linecap:round}.ill .la{stroke:var(--andon);stroke-width:2.5;stroke-linecap:round}.ill .fc{fill:var(--paper);stroke:var(--ink);stroke-width:1.8}.ill .fc.la{stroke:var(--andon);stroke-width:2.6}.ill .fa{fill:var(--andon);stroke:var(--ink);stroke-width:1.5}.ill .fh{fill:url(#hatch);stroke:var(--ink);stroke-width:1.5}.ill .fi{fill:var(--ink)}.ill .fill-none{fill:none}.ill text{font-family:var(--f-mono)}.ill .t{font-size:12.5px;fill:var(--ink)}.ill .tb{font-size:13.5px;font-weight:600;fill:var(--ink)}.ill .tbg{font-size:13.5px;font-weight:600;fill:var(--ink);paint-order:stroke;stroke:var(--paper);stroke-width:4px}.ill .tm{font-size:12px;fill:var(--steel)}.ill .ta{font-size:12.5px;fill:var(--andon-ink);font-weight:600}.ill .tinv{font-size:13px;font-weight:600;fill:var(--on-andon)}.mk{fill:var(--ink)}.mka{fill:var(--andon)}.hbg{fill:var(--paper)}.hln{stroke:var(--steel);stroke-width:2.2}:root .card .hbg{fill:var(--card)}.hero{display:grid;grid-template-columns:1.1fr .9fr;gap:28px;align-items:center;margin-bottom:28px}@media (max-width: 820px){.hero{grid-template-columns:1fr}}.hero p.lead{font-size:19px;color:var(--ink-soft);max-width:52ch}.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin:18px 0}@media (max-width: 560px){.stats{grid-template-columns:repeat(2,1fr)}}.stat{border:1px solid var(--rule);border-radius:10px;padding:12px;background:var(--card)}.stat b{display:block;font-family:var(--f-head);font-size:26px;line-height:1}.modgrid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:14px}.modcard{text-align:left;cursor:pointer;display:flex;flex-direction:column;gap:8px;transition:border-color .2s,transform .2s}.modcard:hover{border-color:var(--ink);transform:translateY(-2px)}.modcard h3{margin:0}.modcard p{font-size:15px;color:var(--ink-soft);margin:0}.meter{height:6px;border-radius:99px;background:var(--rule);overflow:hidden}.meter i{display:block;height:100%;background:var(--ink);border-radius:99px}.meter i.full{background:var(--andon)}.mod-head{display:grid;grid-template-columns:1fr 230px;gap:24px;align-items:center}@media (max-width: 720px){.mod-head{grid-template-columns:1fr}.mod-head .house-mini{display:none}}.stepper{display:flex;gap:0;overflow-x:auto;margin:22px 0 8px;padding:6px 2px 10px;border-bottom:1px solid var(--rule);scrollbar-width:thin}.step{flex:0 0 auto;display:flex;flex-direction:column;align-items:flex-start;gap:4px;padding:6px 12px 6px 0;background:none;border:0;cursor:pointer;min-width:92px;text-align:left}.step .tick{width:100%;height:3px;background:var(--rule);position:relative;border-radius:3px}.step.done .tick{background:var(--ink)}.step.cur .tick{background:var(--andon)}.step .mono{font-size:10.5px}.step.cur .mono{color:var(--andon-ink)}.step .st{font-family:var(--f-head);font-size:13px;font-weight:600;max-width:140px;line-height:1.2}.reader{max-width:720px;margin:0 auto}.reader>p,.reader .body p{font-size:18.5px;line-height:1.7}.keypoints{border-left:3px solid var(--andon);padding:12px 16px;background:var(--card);border-radius:0 10px 10px 0;margin:22px 0}.keypoints ul{margin:6px 0 0;padding-left:18px}.keypoints li{margin:4px 0}.story{border:1px dashed var(--steel);border-radius:10px;padding:16px 18px;margin:22px 0}.story h4{display:flex;gap:8px;align-items:center;margin-bottom:6px}.fw{margin:22px 0}.fw-list{display:grid;gap:8px;margin-top:10px}.fw-item{display:grid;grid-template-columns:30px 1fr;gap:10px;align-items:start;padding:10px 12px;border:1px solid var(--rule);border-radius:8px;background:var(--paper)}.fw-item .n{font-family:var(--f-mono);font-size:12px;color:var(--andon-ink);padding-top:2px}.fw-item b{font-family:var(--f-head)}.fw-compare{width:100%;border-collapse:collapse;margin-top:10px;font-size:15.5px}.fw-compare th{font-family:var(--f-mono);font-size:11px;text-transform:uppercase;letter-spacing:.06em;text-align:left;color:var(--steel);padding:6px 8px;border-bottom:1.5px solid var(--ink)}.fw-compare td{padding:9px 8px;border-bottom:1px solid var(--rule);vertical-align:top}.fw-compare td:last-child{font-weight:600}.pager{display:flex;justify-content:space-between;gap:10px;margin:30px 0 0}.cp{border:2px solid var(--ink);border-radius:12px;padding:22px;background:var(--card)}.cp-head{display:flex;gap:10px;align-items:center;margin-bottom:10px;color:var(--andon-ink)}.opts{display:grid;gap:8px;margin:14px 0}.opt{text-align:left;padding:12px 14px;border:1.5px solid var(--rule);border-radius:9px;background:var(--paper);cursor:pointer;font-family:var(--f-read);font-size:16px}.opt:hover:not(:disabled){border-color:var(--ink)}.opt.sel{border-color:var(--ink);background:var(--card)}.opt.right{border-color:var(--ink);background:color-mix(in srgb,var(--andon) 22%,var(--card))}.opt.wrong{border-style:dashed;color:var(--steel)}.reveal{margin-top:12px;padding:14px;border-radius:9px;background:var(--paper);border:1px solid var(--rule)}.cls-row{display:grid;grid-template-columns:1fr auto;gap:10px;align-items:center;padding:10px 0;border-bottom:1px solid var(--rule)}@media (max-width: 560px){.cls-row{grid-template-columns:1fr}}.seg{display:inline-flex;flex-wrap:wrap;gap:4px}.seg button{padding:6px 10px;border-radius:7px;border:1.5px solid var(--rule);background:var(--paper);cursor:pointer;font-family:var(--f-mono);font-size:11.5px;text-transform:uppercase}.seg button.on{border-color:var(--ink);background:var(--ink);color:var(--on-ink)}.seg button.good{border-color:var(--ink);background:var(--andon);color:var(--on-andon)}.seg button.bad{text-decoration:line-through}.calc{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin:14px 0}@media (max-width: 560px){.calc{grid-template-columns:1fr}}.calc label{display:grid;gap:4px;font-family:var(--f-mono);font-size:11.5px;text-transform:uppercase;color:var(--steel)}input[type=number],input[type=text],input[type=search],textarea{font:inherit;color:var(--ink);background:var(--paper);border:1.5px solid var(--rule);border-radius:8px;padding:9px 11px;width:100%}input:focus,textarea:focus{border-color:var(--ink);outline:none}textarea{min-height:110px;resize:vertical;font-family:var(--f-read);font-size:16.5px;line-height:1.55}input[type=range]{width:100%;accent-color:var(--andon)}.bigread{font-family:var(--f-head);font-size:34px;font-weight:700}.prompt{border:1px solid var(--rule);border-radius:10px;padding:16px;background:var(--card);margin-bottom:14px}.prompt .q{font-family:var(--f-head);font-size:18px;font-weight:600;margin:4px 0 10px}.entry{border-left:3px solid var(--ink);padding:4px 0 4px 14px;margin:12px 0 18px}.entry .meta{display:flex;gap:8px;align-items:center;flex-wrap:wrap}.entry p{white-space:pre-wrap;margin:6px 0}.empty{text-align:center;padding:30px 16px;color:var(--steel)}.qcard{margin-bottom:16px}.score{font-family:var(--f-head);font-size:40px;font-weight:700}.gl-list{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:10px;margin-top:16px}.gl-item{padding:14px;border:1px solid var(--rule);border-radius:10px;background:var(--card)}.gl-item b{font-family:var(--f-head);font-size:17px}.gl-item p{margin:4px 0 6px;font-size:15.5px}.linkish{background:none;border:0;padding:0;cursor:pointer;font-family:var(--f-mono);font-size:11.5px;text-transform:uppercase;letter-spacing:.05em;color:var(--andon-ink);text-decoration:underline;text-underline-offset:3px}.fab{position:fixed;right:20px;bottom:20px;z-index:50;width:64px;height:64px;border-radius:50%;border:2px solid var(--ink);background:var(--card);box-shadow:var(--shadow);display:grid;place-items:center;cursor:pointer}.fab:hover{transform:translateY(-2px)}.fab .badge{position:absolute;top:-2px;right:-2px;width:18px;height:18px;border-radius:50%;background:var(--andon);border:2px solid var(--card)}.fab-callout{position:fixed;right:94px;bottom:30px;z-index:50;max-width:230px;background:var(--ink);color:var(--on-ink);padding:10px 14px;border-radius:12px 12px 2px;font-size:14.5px;line-height:1.4;box-shadow:var(--shadow);cursor:pointer;border:0;text-align:left;font-family:var(--f-read)}@media (max-width: 480px){.fab-callout{right:16px;bottom:96px}}.andon-mark .am-dome{fill:var(--paper);stroke:var(--ink);stroke-width:1.8}.andon-mark .am-base,.andon-mark .am-knob{fill:var(--ink)}.andon-mark .am-cord{stroke:var(--ink);stroke-width:1.6}.andon-mark .am-rays{stroke:var(--andon);stroke-width:1.8;stroke-linecap:round;opacity:0}.andon-mark.lit .am-dome{fill:var(--andon)}.andon-mark.lit .am-rays{opacity:1}.panel{position:fixed;right:20px;bottom:96px;z-index:60;width:min(420px,calc(100vw - 32px));height:min(620px,calc(100vh - 130px));display:flex;flex-direction:column;background:var(--card);border:1.5px solid var(--ink);border-radius:14px;box-shadow:var(--shadow);overflow:hidden}@media (max-width: 480px){.panel{right:16px;left:16px;width:auto;bottom:92px;height:calc(100vh - 120px)}}.panel-h{display:flex;align-items:center;gap:10px;padding:12px 14px;border-bottom:1px solid var(--rule)}.panel-h b{font-family:var(--f-head);font-size:17px;display:block}.panel-h .x{margin-left:auto;background:none;border:0;cursor:pointer;padding:6px;border-radius:6px}.msgs{flex:1;overflow-y:auto;padding:14px;display:flex;flex-direction:column;gap:10px}.msg{max-width:88%;padding:10px 13px;border-radius:12px;font-size:15.5px;line-height:1.5;white-space:pre-wrap}.msg.bot{background:var(--paper);border:1px solid var(--rule);align-self:flex-start;border-top-left-radius:3px}.msg.me{background:var(--ink);color:var(--on-ink);align-self:flex-end;border-top-right-radius:3px}.srcs{display:flex;flex-wrap:wrap;gap:5px;margin-top:8px}.srcs button{font-family:var(--f-mono);font-size:10.5px;text-transform:uppercase;letter-spacing:.04em;padding:3px 7px;border:1px solid var(--andon);color:var(--andon-ink);background:transparent;border-radius:99px;cursor:pointer}.chips{display:flex;flex-wrap:wrap;gap:6px;padding:0 14px 10px}.chips button{font-size:13px;padding:5px 10px;border-radius:99px;border:1px solid var(--rule);background:var(--paper);cursor:pointer;font-family:var(--f-read)}.composer{display:flex;gap:8px;padding:10px;border-top:1px solid var(--rule)}.composer input{flex:1}.typing{color:var(--steel);font-family:var(--f-mono);font-size:12px}.ob-back{position:fixed;top:0;right:0;bottom:0;left:0;z-index:80;background:color-mix(in srgb,var(--ink) 55%,transparent);display:grid;place-items:center;padding:16px}.ob{width:min(640px,100%);max-height:calc(100vh - 32px);overflow-y:auto;background:var(--card);border:1.5px solid var(--ink);border-radius:16px;padding:26px;box-shadow:var(--shadow)}.ob-dots{display:flex;gap:6px}.ob-dots i{width:22px;height:4px;border-radius:4px;background:var(--rule)}.ob-dots i.on{background:var(--andon)}.loop{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;margin:16px 0}@media (max-width: 520px){.loop{grid-template-columns:repeat(2,1fr)}}.loop div{border:1px solid var(--rule);border-radius:10px;padding:12px;text-align:center;background:var(--paper)}.loop div b{display:block;font-family:var(--f-head);margin-top:6px}.loop div span{font-size:13.5px;color:var(--steel)}.meet{display:grid;grid-template-columns:90px 1fr;gap:16px;align-items:center}.pointer{position:fixed;right:26px;bottom:92px;z-index:81;color:var(--andon);font-family:var(--f-mono);font-size:12px;text-transform:uppercase;display:flex;flex-direction:column;align-items:center;gap:4px;animation:bob 1.6s ease-in-out infinite}@keyframes bob{50%{transform:translateY(6px)}}@media (prefers-reduced-motion: reduce){.pointer{animation:none}*{transition:none!important}}.notice{font-size:13.5px;color:var(--steel);border:1px dashed var(--rule);border-radius:8px;padding:8px 12px}.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}.choices{display:grid;gap:8px;margin:8px 0 16px}.choices.c2{grid-template-columns:repeat(2,1fr)}.choices.c3{grid-template-columns:repeat(3,1fr)}@media (max-width: 560px){.choices.c2,.choices.c3{grid-template-columns:1fr}}.choice{display:flex;gap:10px;align-items:flex-start;text-align:left;padding:11px 12px;border:1.5px solid var(--rule);border-radius:10px;background:var(--paper);cursor:pointer;font-family:var(--f-read)}.choice:hover{border-color:var(--ink)}.choice.on{border-color:var(--andon);background:color-mix(in srgb,var(--andon) 12%,var(--card))}.choice b{display:block;font-family:var(--f-head);font-size:15px;font-weight:600;line-height:1.3}.choice small{display:block;color:var(--steel);font-size:13.5px;line-height:1.35;margin-top:2px}.choice-dot{flex:0 0 18px;height:18px;border-radius:50%;border:1.5px solid var(--steel);display:grid;place-items:center;margin-top:2px}.choice.on .choice-dot{background:var(--andon);border-color:var(--andon);color:var(--on-andon)}.chipset{display:flex;flex-wrap:wrap;gap:6px;margin:8px 0 6px}.chipset button{padding:7px 12px;border-radius:99px;border:1.5px solid var(--rule);background:var(--paper);cursor:pointer;font-family:var(--f-read);font-size:14.5px}.chipset button.on{border-color:var(--andon);background:color-mix(in srgb,var(--andon) 14%,var(--card))}.field{display:grid;gap:6px;margin:4px 0 16px}.qlbl{display:block;margin-top:4px;color:var(--ink)}.small{font-size:14px}.ob{width:min(720px,100%)}.ob-house{max-width:300px;margin:6px auto 10px}.ob-split{display:grid;grid-template-columns:1.3fr 1fr;gap:16px;align-items:start}.ob-house.sm{max-width:240px;margin:0 auto}@media (max-width: 600px){.ob-split{grid-template-columns:1fr}.ob-house.sm{max-width:180px}}.iv{margin:0 0 14px}.iv-frame{position:relative;aspect-ratio:16 / 9;background:var(--ink);border-radius:10px;overflow:hidden;border:1.5px solid var(--ink)}.iv-frame video,.iv-facade{position:absolute;top:0;right:0;bottom:0;left:0;width:100%;height:100%;border:0}.iv-facade{padding:0;background:var(--ink);cursor:pointer;display:grid;place-items:center}.iv-facade img{position:absolute;top:0;right:0;bottom:0;left:0;width:100%;height:100%;object-fit:cover;opacity:.92;transition:opacity .2s}.iv-facade:hover img{opacity:1}.iv-play{position:relative;width:64px;height:64px;border-radius:50%;background:var(--andon);color:var(--ink);display:grid;place-items:center}.iv-play .glyph{margin-left:4px;fill:currentColor}.iv figcaption{margin-top:8px;font-size:12px;color:var(--steel);text-transform:uppercase;letter-spacing:.08em}.try{display:grid;gap:6px;margin-top:16px;padding:12px;border:1px dashed var(--andon);border-radius:10px}.try .btn{justify-content:flex-start;text-align:left}.plan{display:grid;gap:10px}.plan-row{display:grid;grid-template-columns:26px 1fr;gap:10px;padding:12px;border:1px solid var(--rule);border-radius:10px;background:var(--paper)}.plan-row b{font-family:var(--f-head);display:block}.plan-row small{color:var(--steel);font-size:14px}.pathcard{margin:0 0 26px}.pathgrid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:10px}@media (max-width: 760px){.pathgrid{grid-template-columns:1fr}}.pathgrid .bigread{font-size:30px;margin:2px 0 6px}.linkish.block{display:block;margin:4px 0;text-align:left}