:root{--ink:#14213a;--muted:#536078;--blue:#213c75;--line:#c4cbd6;--paper:#f5f7fa;--tint:#e5eaf2}*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font:16px/1.6 'Helvetica Neue',Arial,sans-serif;letter-spacing:.1px}a{color:var(--blue);text-underline-offset:4px}button,input,textarea,select{font:inherit}button{cursor:pointer}button,a,input,textarea,summary{outline-offset:5px}button:focus-visible,a:focus-visible,input:focus-visible,textarea:focus-visible,summary:focus-visible{outline:3px solid #174fbc}button{min-height:44px;border:1px solid var(--line);background:transparent;color:var(--ink);padding:10px 16px}button:hover{background:var(--tint)}.skip{position:absolute;left:12px;top:-80px;background:white;padding:12px;z-index:20}.skip:focus{top:8px}.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0)}[hidden]{display:none!important}.mast{display:flex;justify-content:space-between;align-items:center;padding:22px 4vw;gap:25px}.wordmark{display:flex;align-items:center;gap:12px;color:var(--ink);font-weight:600;text-decoration:none;font-size:20px;white-space:nowrap}.mark{display:inline-flex;font-size:27px;border:2px solid currentColor;line-height:1;padding:4px 6px}.mark span{font-size:17px;align-self:flex-end}.mast nav{display:flex;gap:28px;font-size:14px}.mast nav a{padding:8px 0;color:var(--ink)}.mast a[aria-current]{text-decoration-thickness:3px}.bench-heading{padding:22px 4vw 24px;display:flex;align-items:end;justify-content:space-between;gap:25px}.bench-heading h1{font-size:20px;line-height:1.3;font-weight:500;margin:0}.bench-heading p{margin:5px 0 0;color:var(--muted);font-size:14px}.native-link{font-size:14px}.native-link span{font-size:22px;margin-left:16px}.specimen-nav{display:grid;grid-template-columns:repeat(4,1fr);padding:0 4vw}.specimen-nav button{border:0;border-top:1px solid var(--line);border-bottom:1px solid var(--line);text-align:left;padding:16px 20px;font-size:15px}.specimen-nav button span{color:var(--muted);margin-right:22px}.specimen-nav button[aria-pressed=true]{background:var(--blue);color:white;border-color:var(--blue)}.specimen-nav button[aria-pressed=true] span{color:white}.stage{margin:0 4vw;position:relative;border-bottom:1px solid var(--line);min-height:540px;background:white;padding:30px max(6vw,36px) 0}.stage-tag{display:flex;justify-content:space-between;color:var(--muted);font-size:12px;border-bottom:1px dashed var(--line);padding-bottom:16px}.stage fieldset{border:0;padding:36px 0 44px;margin:0;width:calc(100% - 190px);min-height:420px}.stage fieldset>section{max-width:610px;margin:auto}.prompt h2{font-size:40px;font-weight:300;line-height:1.15;letter-spacing:-.8px;margin:4px 0 28px}.eyebrow{font-size:12px;color:var(--muted);margin:0 0 8px}.stage label{display:block;font-size:13px;margin:14px 0 7px}.stage input,.stage textarea{width:100%;border:0;border-bottom:2px solid var(--blue);background:var(--paper);padding:14px;resize:vertical;min-height:50px;color:var(--ink);border-radius:0}.stage textarea{max-height:330px}.hint{font-size:13px;color:var(--muted);line-height:1.6;margin:14px 0 0}.commit{margin-top:18px;border:0;background:var(--blue);color:white;display:flex;justify-content:space-between;gap:30px;min-width:260px}.commit:hover{background:#152c5a}.tally{position:absolute;top:112px;right:5vw;width:130px}.tally>div{margin-bottom:32px}.tally strong{display:block;font-weight:300;font-size:76px;line-height:1;overflow-wrap:anywhere}.tally span{display:block;font-size:12px;line-height:1.4;margin-top:8px;color:var(--muted)}.tally p{font:12px/1.5 ui-monospace,monospace;color:var(--muted);overflow-wrap:anywhere}.bench-controls{display:flex;border-top:1px dashed var(--line);gap:0;justify-content:flex-end;padding:12px 0}.bench-controls button{border:0;font-size:13px}.bench-controls button:last-child{background:var(--ink);color:white;margin-left:16px}.status{font-size:12px;min-height:42px;margin:0 4vw;padding:12px 0;color:var(--muted)}.underbench{margin:20px 4vw 60px;display:grid;grid-template-columns:1.15fr 1fr .8fr;gap:4vw;font-size:14px}.underbench h2{font-size:19px;font-weight:500;margin:0}.underbench p{margin:8px 0}.underbench details{align-self:start}.underbench summary{padding:5px 0;cursor:pointer}.underbench ol{padding-left:21px}.colophon{border-top:1px solid var(--line);padding:24px 4vw;color:var(--muted);font-size:11px;display:flex;align-items:center;gap:24px}.colophon p{flex:1;margin:0;max-width:650px}.colophon a{color:var(--muted)}.colophon span{margin-left:auto}.small{font-size:12px;color:var(--muted)}dialog{border:0;padding:28px 36px;width:min(1060px,95vw);max-height:86vh;color:var(--ink);background:var(--paper);box-shadow:0 10px 80px #101b3240}dialog::backdrop{background:#0a1b38b8}.sheet-top{display:flex;justify-content:space-between;gap:22px;align-items:start}.sheet-top h2{font-size:28px;font-weight:400;margin:0}.sheet-top button{white-space:nowrap}.record-grid{display:grid;grid-template-columns:1fr 1.4fr;gap:32px}.record-grid h3{font-size:15px;font-weight:600;border-bottom:1px solid var(--line);padding-bottom:8px}.record-grid dl{font-size:13px}.record-grid dt{color:var(--muted);margin:18px 0 4px}.record-grid dd{margin:0;white-space:pre-wrap;overflow-wrap:anywhere;font-family:ui-monospace,monospace}.event-list{max-height:330px;overflow:auto;list-style:none;padding:0;font-size:12px;border-bottom:1px solid var(--line)}.event-list li{display:grid;grid-template-columns:90px 100px 1fr;gap:9px;border-top:1px solid var(--line);padding:10px 0;overflow-wrap:anywhere}.event-list span{color:var(--muted)}.export{border-top:1px solid var(--line);padding-top:20px;margin-top:20px}.export label{display:block;font-size:13px;margin-bottom:15px}.export input{width:18px;height:18px;vertical-align:middle}.export button{background:var(--blue);color:white}.book{max-width:1220px;margin:28px auto 90px;padding:0 4vw}.book-heading{border-top:2px solid var(--ink);padding:32px 0 44px;display:grid;grid-template-columns:1.4fr 1fr;gap:7vw;align-items:end}.book-heading h1{font-weight:300;font-size:52px;line-height:1.1;margin:10px 0 0;letter-spacing:-1.3px}.book-heading .intro{font-size:17px;margin:0}.edition{font-size:12px;color:var(--muted)}.observation{display:grid;grid-template-columns:90px 1fr 1fr;gap:30px;padding:34px 0;border-top:1px solid var(--line)}.case-no{font-size:50px;font-weight:300;line-height:1}.observation h2{font-size:24px;line-height:1.25;font-weight:400;margin:0 0 14px}.observation p{font-size:15px}.observation h3{font-size:13px;font-weight:600;margin:0 0 10px}.observation pre,.recipe pre{font:13px/1.6 ui-monospace,monospace;background:white;border-left:3px solid var(--blue);padding:18px;overflow:auto;white-space:pre-wrap;overflow-wrap:anywhere}.finding{border-bottom:1px dashed var(--line);padding:14px 0;margin:0!important}.finding b{display:block;font-size:12px;font-weight:500;color:var(--muted)}.result-side{background:var(--tint);padding:22px}.result-side p:last-child{margin-bottom:0}.book-ending{border-top:2px solid var(--ink);margin-top:30px;padding:26px 0;display:flex;gap:50px}.book-ending>*{flex:1}.recipe{display:grid;grid-template-columns:90px minmax(0,1fr);gap:32px;border-top:1px solid var(--line);padding:32px 0}.recipe>div{max-width:850px;min-width:0}.recipe h2{font-size:26px;font-weight:400;margin:0 0 18px}.recipe p,.recipe li{font-size:16px}.download{display:inline-block;background:var(--blue);color:white;padding:14px 22px;margin:8px 0;text-decoration:none}.transfer{display:grid;grid-template-columns:1fr 1fr;gap:30px;border-top:1px solid var(--line);padding:30px 0}.transfer h2{font-size:26px;line-height:1.25;font-weight:400}.transfer dt{font-weight:600;font-size:13px;margin-top:18px}.transfer dd{margin:5px 0 20px;font-size:15px}.transfer blockquote{margin:0;background:white;border-left:3px solid var(--blue);padding:22px;font-size:15px}.plain{max-width:780px;margin:40px auto 90px;padding:0 25px}.plain h1{font-size:43px;font-weight:300;line-height:1.2}.plain h2{font-weight:400;font-size:25px;margin-top:36px}.plain li{margin:9px 0}code{font-size:.88em;overflow-wrap:anywhere}a{overflow-wrap:anywhere}@media(max-width:760px){.mast{padding:16px 20px;align-items:start}.mast nav{flex-direction:column;gap:0;align-items:end;font-size:12px}.mast nav a{padding:4px 0}.wordmark{font-size:17px;gap:8px}.bench-heading{padding:16px 20px;display:block}.bench-heading h1{font-size:17px}.bench-heading h1 br{display:none}.native-link{display:inline-block;margin-top:10px;font-size:12px}.specimen-nav{padding:0 20px;grid-template-columns:1fr 1fr}.specimen-nav button{padding:12px;font-size:13px}.specimen-nav button span{margin-right:12px}.stage{margin:0 20px;padding:18px 18px 0;min-height:0}.stage-tag{font-size:10px;gap:16px}.stage fieldset{padding:28px 0;min-height:0;width:100%}.prompt h2{font-size:32px;margin-bottom:22px}.stage label{font-size:13px}.stage input,.stage textarea{font-size:16px}.commit{min-width:0;width:100%;font-size:13px}.hint{font-size:12px}.tally{position:static;display:flex;gap:24px;width:auto;border-top:1px dashed var(--line);padding:18px 0;align-items:center}.tally>div{display:flex;gap:8px;align-items:center;margin:0}.tally strong{font-size:36px}.tally span{font-size:10px;margin:0}.tally p{margin:0;font-size:10px;max-width:80px}.bench-controls{display:grid;grid-template-columns:1fr 1fr;gap:5px}.bench-controls button{padding:9px 4px;font-size:12px}.bench-controls button:last-child{grid-column:1/-1;margin:0}.status{margin:0 20px;padding:12px 0;line-height:1.5;font-size:11px}.underbench{display:block;margin:20px 20px 36px}.underbench>div,.underbench>details{margin-bottom:24px}.colophon{display:block;padding:22px 20px}.colophon p{margin-bottom:14px}.colophon span{display:block;margin-top:14px}dialog{padding:22px 18px;max-height:90vh;width:calc(100vw - 20px)}.sheet-top h2{font-size:23px}.sheet-top button{font-size:12px;padding:7px 10px}.record-grid{grid-template-columns:1fr;gap:10px}.event-list{max-height:250px}.event-list li{grid-template-columns:70px 1fr}.event-list code{grid-column:1/-1}.book{padding:0 20px;margin:24px auto 50px}.book-heading{display:block;padding:24px 0}.book-heading h1{font-size:36px;letter-spacing:-.6px}.book-heading .intro{font-size:15px;margin-top:22px}.observation{grid-template-columns:44px minmax(0,1fr);gap:18px;padding:26px 0}.case-no{font-size:32px}.observation .result-side{grid-column:2;padding:16px}.observation h2{font-size:22px}.observation p{font-size:14px}.book-ending{display:block}.book-ending>*{margin-bottom:25px}.recipe{grid-template-columns:34px minmax(0,1fr);gap:18px;padding:25px 0}.recipe h2{font-size:23px}.recipe p,.recipe li{font-size:15px}.recipe pre{font-size:12px;padding:12px}.transfer{grid-template-columns:1fr;gap:10px}.transfer h2{font-size:25px}.plain{margin-top:24px}.plain h1{font-size:34px}}@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important}}@media print{.mast,.colophon,.specimen-nav,.bench-controls,.underbench{display:none}body{background:white;color:black}.book{max-width:none;padding:0}.observation,.recipe{break-inside:avoid}.result-side{background:white;border:1px solid #aaa}}
/* Keep standalone footer and task links comfortable to tap. */
.colophon a{display:inline-flex;align-items:center;min-height:28px}.transfer>div>a{display:inline-block;min-height:32px;padding:4px 0}.stage fieldset{min-width:0}
@media(max-width:760px){.bench-heading h1 br{display:initial}.bench-heading h1 br:after{content:' '}}
/* The supporting instruction is a single note, not a row of guide cards. */
.underbench{display:block;max-width:850px;border-left:2px solid var(--line);padding-left:24px}.underbench>div,.underbench>details{margin-bottom:18px}.mark{width:50px;height:40px;padding:0;flex-shrink:0}