:root{--ink:#173149;--muted:#526577;--line:#d3dde3;--paper:#fff;--canvas:#dfe6eb;--teal:#12746c;--amber:#9b640c;--blue:#e9f0f7;--navy:#1b3f60}*{box-sizing:border-box}body{margin:0;color:var(--ink);background:var(--paper);font:15px/1.5 'Segoe UI','Helvetica Neue',sans-serif}button,input,textarea{font:inherit}button,.upload-button{cursor:pointer}button{border:1px solid var(--line);background:white;color:var(--ink);border-radius:5px;padding:10px 13px}button:hover{background:var(--blue)}button:disabled{opacity:.5;cursor:not-allowed}a{color:var(--navy)}button:focus-visible,a:focus-visible,textarea:focus-visible,input:focus-visible,#viewer:focus-visible,.upload-button:focus-within{outline:3px solid #3878ad;outline-offset:3px}[hidden]{display:none!important}.masthead{height:76px;display:flex;align-items:center;gap:36px;padding:0 28px;border-bottom:1px solid var(--line)}.brand{text-decoration:none;color:var(--ink);font-size:23px;font-weight:650;letter-spacing:-.6px;display:flex;align-items:center;gap:12px}.brand-mark{font-size:38px;line-height:1;color:var(--teal)}.purpose{color:var(--muted);font-size:14px}.project-note{margin-left:auto;font-size:12px;color:var(--muted)}.workspace{display:grid;grid-template-columns:235px minmax(280px,1fr) 355px;min-height:calc(100vh - 76px)}h1,h2,h3,p{margin:0}h1,h2{font-size:18px;line-height:1.3;font-weight:650}h3{font-size:15px;font-weight:650}p{margin-top:9px}.muted{color:var(--muted)}.small{font-size:13px}.sheets-panel{padding:26px 20px;border-right:1px solid var(--line);background:#f8fafb}.sheets-panel>p{font-size:13px;margin-bottom:22px}.upload-button{display:block;background:var(--navy);color:white;border-radius:5px;text-align:center;padding:10px}.file-input{width:100%;font-size:12px;margin:8px 0 12px}.secondary{width:100%;font-size:13px}.fine-print{font-size:12px!important;line-height:1.6;margin-top:14px!important}.set-heading{border-top:1px solid var(--line);padding-top:23px;margin-top:24px;margin-bottom:15px}.set-heading h2{font-size:14px;overflow-wrap:anywhere}.set-heading p{font-size:12px}.sheet-button{width:100%;text-align:left;margin:0 0 8px;padding:12px;border-color:transparent;background:transparent}.sheet-button strong{display:block;font-size:15px}.sheet-button span{display:block;font-size:12px;color:var(--muted);margin-top:3px}.sheet-button.active{background:var(--blue);border-color:#aabcc9}.sample-note{margin-top:24px;font-size:12px;padding-top:16px;border-top:1px solid var(--line)}.sample-note strong{color:var(--amber)}.sample-note a{display:inline-block;margin-top:10px}.drawing-panel{background:var(--canvas);display:flex;flex-direction:column;min-width:0;position:sticky;top:0;height:calc(100vh - 76px)}.viewer-toolbar{min-height:60px;padding:12px 18px;display:flex;justify-content:space-between;align-items:center;gap:12px;border-bottom:1px solid #c9d3db;background:#f1f5f7;font-size:13px}.zoom-controls{display:flex;flex-shrink:0;gap:5px}.zoom-controls button{padding:4px 10px;font-size:13px}#viewer{overflow:auto;flex:1;position:relative;padding:30px;overscroll-behavior:contain}#viewer-empty{height:100%;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;color:var(--muted);font-size:14px}#viewer-empty h2{font-size:23px;color:var(--ink);font-weight:500}.empty-sheet{font-size:100px;line-height:1.3;color:#6c879c}#sheet-stage{position:relative;background:white;box-shadow:0 4px 18px #17314920;transform-origin:top left;margin:0 auto}#drawing-image{display:block;width:100%;height:auto}#overlay{position:absolute;inset:0;width:100%;height:100%;pointer-events:none;overflow:visible}.evidence-box{fill:#12746c18;stroke:var(--teal);stroke-width:2;vector-effect:non-scaling-stroke}.evidence-box.unverified{fill:#9b640c14;stroke:var(--amber);stroke-dasharray:7 4}.evidence-box.selected{stroke-width:4}.viewer-footer{padding:12px 16px;font-size:12px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;border-top:1px solid #c5d1da;background:#f1f5f7}.key{display:inline-block;width:12px;height:9px;border:1.5px solid var(--teal);margin:0 4px 0 10px}.key.unverified{border-color:var(--amber);border-style:dashed}.answer-panel{padding:26px 24px;border-left:1px solid var(--line)}.answer-heading p{font-size:13px}.answer-heading{margin-bottom:24px}label{display:block;font-size:13px;font-weight:600;margin-bottom:7px}textarea{resize:vertical;width:100%;min-height:100px;border:1px solid #aabcc9;border-radius:5px;padding:12px;color:var(--ink);line-height:1.5;background:#fcfdff}textarea::placeholder{color:#65778a}#ask{width:100%;background:var(--navy);color:white;border:0;margin-top:9px}#ask:hover:not(:disabled),.upload-button:hover{background:#275779}.suggestions{margin:21px 0}.suggestions>span{font-size:12px}.suggestions button{display:block;border:0;border-bottom:1px solid var(--line);border-radius:0;width:100%;text-align:left;padding:9px 0;font-size:12px;color:var(--navy);background:transparent}.suggestions button:hover{text-decoration:underline}#notice{padding:13px;background:var(--blue);border:1px solid var(--navy);font-size:13px;overflow-wrap:anywhere}#notice.error{background:#fff4dc;border-color:var(--amber)}#answer-result{margin-top:28px;border-top:1px solid var(--line);padding-top:20px}#verification-status{font-size:12px;font-weight:600;color:var(--teal)}#verification-status.manual{color:var(--amber)}#answer-text{font-size:16px;line-height:1.65;white-space:pre-wrap;overflow-wrap:anywhere}#confidence{font-size:12px;margin-bottom:21px}#warnings{padding-left:17px;font-size:12px;color:var(--amber)}.evidence-chip{display:flex;gap:10px;width:100%;text-align:left;margin-top:10px;border-color:var(--teal);font-size:12px;background:#f8fcfb}.evidence-chip.unverified{border-color:var(--amber);border-style:dashed;background:#fffaf0}.evidence-chip.selected{outline:2px solid var(--navy);outline-offset:2px}.chip-number{border-radius:50%;background:var(--teal);color:white;flex:0 0 23px;height:23px;text-align:center;line-height:23px}.unverified .chip-number{background:var(--amber)}.chip-copy{min-width:0;overflow-wrap:anywhere}.chip-copy strong{display:block}.chip-copy q{display:block;margin-top:4px}.chip-copy small{display:block;margin-top:5px;color:var(--muted)}#arithmetic{margin-top:16px;font-size:12px}.verification-note{border-top:1px solid var(--line);margin-top:30px;padding-top:18px;font-size:12px;color:var(--muted);line-height:1.65}.verification-note strong{color:var(--ink)}@media(min-width:1600px){.workspace{grid-template-columns:260px minmax(280px,1fr) 400px}.answer-panel{padding:32px}.sheets-panel{padding:30px 24px}}@media(max-width:1100px){.workspace{grid-template-columns:190px minmax(260px,1fr) 300px}.sheets-panel{padding:22px 14px}.answer-panel{padding:22px 18px}.purpose{display:none}.viewer-toolbar{flex-wrap:wrap}}@media(max-width:800px){.masthead{height:auto;min-height:66px;padding:12px 18px;gap:10px}.brand{font-size:21px}.project-note{font-size:12px}.workspace{display:flex;flex-direction:column}.sheets-panel{border-right:0;padding:18px;display:grid;grid-template-columns:1fr 1fr;gap:10px}.sheets-panel h1,.sheets-panel>p,.set-heading,#sheet-list,.sample-note{grid-column:1/-1}.sheets-panel>p{margin:0}.sheets-panel .fine-print{margin:0!important}.file-input{align-self:center}.set-heading{padding-top:12px;margin:5px 0 0}#sheet-list{display:flex;gap:8px;overflow:auto}.sheet-button{min-width:150px}.sample-note{margin-top:0;padding-top:12px}.drawing-panel{position:relative;height:60vh;min-height:330px}.answer-panel{border-left:0;border-top:1px solid var(--line)}#viewer{padding:16px}.viewer-footer{font-size:12px}.answer-heading{margin-bottom:16px}}@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important}}
#sample-file{font:inherit;width:100%;min-width:0;color:var(--ink);background:var(--paper);border:1px solid var(--line);border-radius:5px;padding:9px;margin-bottom:8px}label[for="sample-file"]{margin-top:18px}#sample-file:focus-visible,summary:focus-visible{outline:3px solid #3878ad;outline-offset:3px}#source-credit{margin-top:14px;font-size:12px}#credit-text{white-space:pre-wrap;overflow-wrap:anywhere;font:inherit;max-height:240px;overflow:auto}.count-marker{fill:var(--navy);stroke:white;stroke-width:1.5;vector-effect:non-scaling-stroke}.count-number{fill:white;text-anchor:middle;dominant-baseline:central;font-weight:700}@media(max-width:800px){label[for="sample-file"],#sample-file,#open-sample-file,#source-credit{grid-column:1/-1}}