:root{--paper:#EDEFF1;--paper-card:#F7F8F9;--ink:#1B2430;--ink-soft:#4B5563;--line:#C7CCD1;--signal:#C8483A;--signal-soft:#E8CFC9;--teal:#3E7C7C;--teal-soft:#D7E4E2;--amber:#B6862C;--amber-soft:#FBF3E2}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{background:var(--paper);color:var(--ink);font-family:'IBM Plex Sans',sans-serif;-webkit-font-smoothing:antialiased;line-height:1.55}
a{color:var(--teal)}
.wrap{max-width:980px;margin:0 auto;padding:0 28px}
@media(max-width:640px){.wrap{padding:0 16px}}
.mono{font-family:'IBM Plex Mono',monospace}
.eyebrow{font-family:'IBM Plex Mono',monospace;font-size:12px;letter-spacing:.12em;text-transform:uppercase;color:var(--teal);font-weight:600;margin-bottom:12px}
h1{font-family:'Space Grotesk',sans-serif;font-weight:700;font-size:clamp(28px,4.2vw,44px);line-height:1.08;letter-spacing:-.015em;max-width:24ch}
h2{font-family:'Space Grotesk',sans-serif;font-weight:600;font-size:clamp(20px,2.6vw,26px);letter-spacing:-.01em;margin-bottom:6px}
h3{font-family:'Space Grotesk',sans-serif;font-weight:600;font-size:16.5px;line-height:1.3}
.lede{font-size:15.5px;color:var(--ink-soft);max-width:62ch;margin-top:14px}
.hero{padding:48px 0 32px;border-bottom:1px solid var(--line)}
.sec{padding:44px 0;border-bottom:1px solid var(--line)}
.sec:last-of-type{border-bottom:none}
.sec-desc{color:var(--ink-soft);font-size:14.5px;max-width:64ch;margin-bottom:22px}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(270px,1fr));gap:0;border-top:1px solid var(--line);border-left:1px solid var(--line)}
.grid>*{border-right:1px solid var(--line);border-bottom:1px solid var(--line)}
.card{background:var(--paper-card);padding:20px;display:flex;flex-direction:column;gap:8px;text-decoration:none;color:inherit;transition:background .15s}
a.card:hover{background:#fff}
.card p{font-size:13.5px;color:var(--ink-soft)}
.card .go{margin-top:auto;font-family:'IBM Plex Mono',monospace;font-size:11.5px;font-weight:600;color:var(--teal);letter-spacing:.04em;text-transform:uppercase;padding-top:6px}
.tag{font-family:'IBM Plex Mono',monospace;font-size:10px;letter-spacing:.06em;text-transform:uppercase;font-weight:600;padding:2px 7px;border:1px solid currentColor;width:fit-content}
/* router */
.router{margin-top:26px;border:1px solid var(--line);background:var(--paper-card);padding:22px}
.rt-step{font-family:'IBM Plex Mono',monospace;font-size:11px;letter-spacing:.08em;text-transform:uppercase;color:var(--ink-soft);font-weight:600;margin-bottom:10px}
.rt-opts{display:flex;flex-wrap:wrap;gap:8px}
.rt-btn{font-family:'IBM Plex Sans',sans-serif;font-size:14px;color:var(--ink);background:var(--paper);border:1px solid var(--line);padding:9px 13px;cursor:pointer;transition:all .12s}
.rt-btn:hover{border-color:var(--ink-soft)}
.rt-btn.sel{border-color:var(--teal);background:var(--teal-soft);color:#12403F;font-weight:500}
.rt-step2{margin-top:20px;display:none}.rt-step2.show{display:block}
.rt-result{margin-top:20px;display:none;border-top:1px dashed var(--line);padding-top:18px}.rt-result.show{display:block}
.rt-go{display:block;text-decoration:none;background:var(--ink);color:#F1EFE8;padding:14px 16px;font-size:15px}
.rt-go b{color:#fff}.rt-go:hover{background:#26303D}
.rt-path{font-family:'IBM Plex Mono',monospace;font-size:11px;letter-spacing:.04em;color:#9CA3AF;display:block;margin-bottom:4px;text-transform:uppercase}
.rt-more{display:flex;flex-wrap:wrap;gap:8px;margin-top:10px}
.btn{font-family:'IBM Plex Mono',monospace;font-size:12px;font-weight:600;color:var(--teal);border:1px solid var(--teal);padding:7px 12px;text-decoration:none;background:transparent;cursor:pointer;display:inline-block}
.btn:hover{background:var(--teal);color:#fff}
.btn.dark{border-color:var(--ink);color:var(--ink)}.btn.dark:hover{background:var(--ink);color:#fff}
/* chain */
.chain{border:1px solid var(--line);background:var(--paper-card)}
.ch-row{display:grid;grid-template-columns:190px 1fr;border-bottom:1px solid var(--line)}
.ch-row:last-child{border-bottom:none}
.ch-l{padding:14px 16px;border-right:1px solid var(--line);background:var(--paper)}
.ch-l b{display:block;font-family:'Space Grotesk',sans-serif;font-size:14.5px}
.ch-l span{font-size:12px;color:var(--ink-soft)}
.ch-row.model .ch-l b{color:var(--teal)}.ch-row.user .ch-l b{color:var(--amber)}.ch-row.business .ch-l b{color:var(--signal)}
.ch-r{padding:14px 16px;display:flex;flex-wrap:wrap;gap:6px;align-items:center;font-size:14px}
.ch-hyp{padding:8px 16px 8px 206px;font-size:13px;color:var(--ink-soft);font-style:italic;background:var(--paper);border-bottom:1px solid var(--line)}
.ch-hyp::before{content:'↓ hypothesis: ';font-style:normal;font-family:'IBM Plex Mono',monospace;font-size:10.5px;letter-spacing:.05em;text-transform:uppercase;color:var(--ink-soft)}
@media(max-width:640px){.ch-row{grid-template-columns:1fr}.ch-l{border-right:none;border-bottom:1px solid var(--line)}.ch-hyp{padding-left:16px}}
/* metric chips */
.mchip{display:inline-flex;align-items:stretch;border:1px solid var(--line);background:var(--paper);font-family:'IBM Plex Mono',monospace;font-size:11.5px;font-weight:600}
.mchip a{color:var(--ink);text-decoration:none;padding:4px 8px}
.mchip a:hover{color:var(--signal)}
.mchip a.sh{border-left:1px solid var(--line);color:var(--ink-soft);font-weight:500}
/* kit */
.risk{margin-top:18px;padding:12px 16px;background:var(--signal-soft);border-left:3px solid var(--signal);font-size:14px;max-width:70ch}
.risk b{font-family:'IBM Plex Mono',monospace;font-size:10.5px;letter-spacing:.06em;text-transform:uppercase;color:var(--signal);margin-right:6px}
.stepper{position:sticky;top:0;z-index:20;background:var(--paper);border-bottom:1px solid var(--line)}
.stepper .wrap{display:flex;gap:0;overflow-x:auto}
.stepper a{font-family:'IBM Plex Mono',monospace;font-size:12px;color:var(--ink-soft);text-decoration:none;padding:13px 11px;border-right:1px solid var(--line);white-space:nowrap}
.stepper a:first-child{border-left:1px solid var(--line)}
.stepper a:hover{color:var(--ink);background:var(--paper-card)}
.stepper a .n{color:var(--signal);margin-right:6px}
.dec{background:var(--paper-card);border:1px solid var(--line);margin-bottom:12px;scroll-margin-top:60px}
.dec:target{border-color:var(--teal);box-shadow:0 0 0 2px var(--teal-soft)}
.dec-top{padding:18px 20px 14px}
.dec-q{margin-bottom:6px}
.dec-quick{font-size:14px;color:var(--ink-soft)}
.dec-note{margin-top:10px;padding:9px 12px;background:var(--teal-soft);font-size:13.5px;color:var(--ink)}
.dec-note b{font-family:'IBM Plex Mono',monospace;font-size:10.5px;letter-spacing:.05em;text-transform:uppercase;color:var(--teal);margin-right:6px}
.dec-row{display:flex;flex-wrap:wrap;gap:6px;align-items:center;margin-top:12px}
.dec-lbl{font-family:'IBM Plex Mono',monospace;font-size:10.5px;letter-spacing:.05em;text-transform:uppercase;color:var(--ink-soft);margin-right:4px}
.dec details{border-top:1px solid var(--line)}
.dec summary{cursor:pointer;padding:10px 20px;font-family:'IBM Plex Mono',monospace;font-size:11.5px;color:var(--ink-soft)}
.dec summary:hover{color:var(--ink)}
.dec-more{padding:0 20px 16px;display:grid;gap:10px;font-size:13.5px;color:var(--ink-soft)}
.dec-more b{color:var(--ink);font-weight:600}
.stage-h{display:flex;align-items:baseline;gap:12px;margin-bottom:16px;scroll-margin-top:56px}
.stage-h .n{font-family:'IBM Plex Mono',monospace;font-size:13px;color:var(--signal);font-weight:600}
.sym{background:var(--paper-card);border:1px solid var(--line);border-left:3px solid var(--amber);padding:16px 18px;margin-bottom:10px}
.sym-s{font-family:'Space Grotesk',sans-serif;font-weight:600;font-size:15px}
.sym-c{font-size:13.5px;color:var(--ink-soft);margin-top:4px}
.export{margin-top:8px;display:flex;flex-wrap:wrap;gap:10px;align-items:center}
.small{font-size:12.5px;color:var(--ink-soft)}
footer.ft{padding:30px 0 50px;border-top:1px solid var(--line);font-family:'IBM Plex Mono',monospace;font-size:12px;color:var(--ink-soft)}
footer.ft a{color:var(--ink-soft)}
footer.ft .wrap{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap}
/* grids: build picks 2 or 3 columns; the last card stretches so rows never have empty cells */
.grid.c2{grid-template-columns:repeat(2,1fr)}.grid.c3{grid-template-columns:repeat(3,1fr)}
.card.span2{grid-column:span 2}.card.span3{grid-column:span 3}
.card.feature{background:#fff;border-left:3px solid var(--teal)}
@media(max-width:760px){.grid.c2,.grid.c3{grid-template-columns:1fr}.card.span2,.card.span3{grid-column:auto}}
/* scenario: system flow */
.flow{border:1px solid var(--line);background:var(--paper-card);padding:18px}
.fl-row{display:flex;align-items:stretch;gap:8px}
.fl-box{flex:1;background:var(--paper);border:1px solid var(--line);border-top:3px solid var(--teal);padding:12px 12px 14px}
.fl-box b{display:block;font-family:'Space Grotesk',sans-serif;font-size:14.5px;margin-bottom:4px}
.fl-box span{font-size:13px;color:var(--ink-soft)}
.fl-arrow{align-self:center;color:var(--ink-soft);font-size:18px}
.fl-loop{margin-top:12px;padding-top:10px;border-top:1px dashed var(--line);font-size:13px;color:var(--amber);font-weight:500}
@media(max-width:760px){.fl-row{flex-direction:column}.fl-arrow{transform:rotate(90deg)}}
.same{margin-top:16px;padding:12px 16px;background:var(--teal-soft);border-left:3px solid var(--teal);font-size:14px}
.decide{margin-top:12px}.decide ul{margin:6px 0 0 18px;font-size:14px;color:var(--ink)}.decide li{margin-bottom:4px}
.step-q{font-size:16px;color:var(--ink);font-style:italic;margin-bottom:14px}
/* scenario: where the kits come in */
.relgrid{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line);border:1px solid var(--line)}
@media(max-width:760px){.relgrid{grid-template-columns:1fr}}
.relcol{background:var(--paper-card);padding:18px}
.rel{padding:10px 0;border-top:1px solid var(--line);font-size:13.5px}.rel:first-of-type{border-top:none}
.rel b{font-family:'Space Grotesk',sans-serif;font-size:14.5px;display:block}.rel a{text-decoration:none}
.rel span{color:var(--ink-soft)}.rel.fut b{color:var(--ink-soft)}.rel.fut b::after{content:' · not built yet';font-family:'IBM Plex Mono',monospace;font-size:10px;letter-spacing:.04em;color:var(--amber)}
/* kits: scenario x kit matrix */
.mtx-wrap{overflow-x:auto;border:1px solid var(--line)}
.mtx{width:100%;border-collapse:collapse;background:var(--paper-card);font-size:13.5px}
.mtx th,.mtx td{padding:11px 12px;border-bottom:1px solid var(--line);text-align:center}
.mtx th{font-family:'IBM Plex Mono',monospace;font-size:10.5px;letter-spacing:.04em;text-transform:uppercase;font-weight:600;background:var(--paper)}
.mtx th a{color:var(--ink);text-decoration:none}.mtx td:first-child,.mtx th:first-child{text-align:left;white-space:nowrap}
.mtx td:first-child a{color:var(--ink);font-weight:500;text-decoration:none}.mtx .dot{color:var(--teal);font-size:15px}
.mtx tr:last-child td{border-bottom:none}
.fitq{border:1px solid var(--line);background:var(--paper-card);padding:18px 20px;margin-bottom:12px}
.fitq h3{margin-bottom:4px}.fitq .small{margin-bottom:12px;max-width:70ch}
.rq{font-family:'IBM Plex Sans',sans-serif;font-size:13.5px;color:var(--ink);background:var(--paper);border:1px solid var(--line);padding:8px 12px;cursor:pointer;transition:all .12s}
.rq:hover{border-color:var(--ink-soft)}
.rq.sel-ok{border-color:#16A34A;background:#F0FDF4;color:#166534;font-weight:500}
.rq.sel-thin{border-color:var(--amber);background:#FFFBEB;color:#854F0B;font-weight:500}
.rq.sel-no{border-color:var(--signal);background:var(--signal-soft);color:#991B1B;font-weight:500}
.rubric-result{display:none;border:1px solid var(--line);background:var(--paper);padding:20px;margin-top:8px}
.rubric-result.show{display:block}
.rr-label{font-family:'IBM Plex Mono',monospace;font-size:10.5px;letter-spacing:.07em;text-transform:uppercase;font-weight:600;margin-bottom:6px}
.rr-label.green{color:#16A34A}.rr-label.amber{color:var(--amber)}.rr-label.red{color:var(--signal)}
.rr-heading{font-family:'Space Grotesk',sans-serif;font-size:19px;font-weight:700;margin-bottom:8px}
.rr-body{font-size:13.5px;line-height:1.6;color:var(--ink-soft);max-width:72ch}
.mtx.capt td{text-align:left}.mtx.capt td:first-child{font-weight:500;white-space:normal}
.mtx.capt .ex{color:var(--ink-soft);font-size:12.5px}
.bcgrid{display:grid;grid-template-columns:1fr 1fr;gap:14px}
@media(max-width:760px){.bcgrid{grid-template-columns:1fr}}
.bcf{display:flex;flex-direction:column;gap:5px}
.bcf span{font-family:'IBM Plex Mono',monospace;font-size:11px;letter-spacing:.04em;text-transform:uppercase;color:var(--ink-soft)}
.bcf input,.bcf textarea{font-family:'IBM Plex Sans',sans-serif;font-size:13.5px;color:var(--ink);background:var(--paper-card);border:1px solid var(--line);padding:9px 11px;width:100%;resize:vertical}
.bcf input:focus,.bcf textarea:focus{outline:none;border-color:var(--teal);background:#fff}
.bcf ::placeholder{color:#9AA3AD}
.asksent{background:var(--paper-card);border:1px solid var(--line);border-left:3px solid var(--teal);padding:16px 18px;font-size:16px;line-height:1.6}
.asksent b{color:var(--ink);font-weight:600}
.gaplist{margin:8px 0 0 18px}.gaplist li{margin-bottom:6px;line-height:1.55}
.promptbox{width:100%;font-family:'IBM Plex Mono',monospace;font-size:12px;line-height:1.55;color:var(--ink);background:var(--paper-card);border:1px solid var(--line);padding:14px;resize:vertical}
.copybtn{width:100%;margin-top:10px;background:var(--ink);color:#F1EFE8;border:none;padding:14px;font-family:'IBM Plex Mono',monospace;font-size:13px;font-weight:600;cursor:pointer;letter-spacing:.02em}
.copybtn:hover{background:#26303D}.copybtn.done{background:var(--teal)}
.ng{margin-top:18px;border-left:3px solid var(--teal);background:var(--teal-soft);padding:12px 16px;display:grid;gap:6px;max-width:72ch}
.ng div{font-size:13.5px;line-height:1.55;color:var(--ink)}
.ng b{font-family:'IBM Plex Mono',monospace;font-size:10.5px;letter-spacing:.06em;text-transform:uppercase;color:var(--teal);font-weight:600;margin-right:8px}
.card p b{color:var(--ink)}
.card .cardng{font-size:12px;color:var(--ink-soft);margin-top:4px}
.card .cardng:first-of-type{margin-top:10px;padding-top:10px;border-top:1px dashed var(--line)}
.card .cardng b{font-family:'IBM Plex Mono',monospace;font-size:10px;letter-spacing:.04em;text-transform:uppercase;color:var(--teal);font-weight:600}
.dec-note .steps{margin:8px 0 2px 20px;padding:0}
.dec-note .steps li{margin-bottom:6px;line-height:1.55}
.dec-note .steps .stp{font-family:inherit;font-size:inherit;letter-spacing:0;text-transform:none;color:var(--ink);font-weight:600;margin-right:0}
.bcf select{font-family:'IBM Plex Sans',sans-serif;font-size:13.5px;color:var(--ink);background:var(--paper-card);border:1px solid var(--line);padding:9px 11px;width:100%}
.bltable td{padding:6px 8px}
.bltable input{width:100%;font-family:'IBM Plex Mono',monospace;font-size:13px;color:var(--ink);background:var(--paper-card);border:1px solid var(--line);padding:7px 9px}
.bltable input:focus{outline:none;border-color:var(--teal);background:#fff}
.bltable td:first-child input{font-family:'IBM Plex Sans',sans-serif}
.mtx .ci{color:var(--ink-soft);font-size:12px}
.verdict-box{margin-top:16px;border:1px solid var(--line);border-left:3px solid var(--teal);background:var(--paper-card);padding:14px 18px}
.vlist{margin:0 0 0 18px}.vlist li{margin-bottom:8px;line-height:1.6;font-size:14px}
.warnline{font-family:'IBM Plex Mono',monospace;font-size:11px;letter-spacing:.04em;text-transform:uppercase;color:var(--amber);font-weight:600}
.stok{display:flex;flex-wrap:wrap;gap:8px;margin-top:18px}
.stok input{flex:1 1 260px;font-family:'IBM Plex Mono',monospace;font-size:13px;padding:9px 11px;border:1px solid var(--line);background:var(--paper-card)}
.tiles{display:grid;grid-template-columns:repeat(5,1fr);gap:1px;background:var(--line);border:1px solid var(--line);margin-bottom:34px}
@media(max-width:760px){.tiles{grid-template-columns:repeat(2,1fr)}}
.tile{background:var(--paper-card);padding:14px 16px;display:flex;flex-direction:column;gap:4px}
.tile span{font-family:'IBM Plex Mono',monospace;font-size:10.5px;letter-spacing:.05em;text-transform:uppercase;color:var(--ink-soft)}
.tile b{font-family:'Space Grotesk',sans-serif;font-size:24px;color:var(--ink)}
#out h2{margin-top:34px}
.mtx.st td{text-align:left;white-space:nowrap}.mtx.st td:first-child{font-family:'IBM Plex Mono',monospace;font-size:12.5px}
.sb{display:inline-block;width:90px;height:8px;background:var(--paper);border:1px solid var(--line);vertical-align:middle;margin-right:6px}
.sb span{display:block;height:100%;background:var(--teal)}
.two{display:grid;grid-template-columns:1fr 1fr;gap:18px}@media(max-width:760px){.two{grid-template-columns:1fr}}
.raw{margin-top:30px}.raw pre{font-size:11px;max-height:320px;overflow:auto;background:var(--paper-card);border:1px solid var(--line);padding:12px}