.spread-lab{margin:24px 0;padding:28px;border:1px solid #cbd7e7;border-radius:22px;background:#f2f5fb;color:#273b55}.spread-lab h2{margin:12px 0}.spread-lab p{line-height:1.6}.spread-scope{border-left:3px solid #8299bc;padding-left:12px;color:#50667e}.spread-toggle{display:flex;align-items:center;gap:10px;min-height:48px}.spread-lab input:is([type=checkbox],[type=radio]){width:24px;height:24px;accent-color:#365f9d;flex:none}.spread-workbench{display:grid;grid-template-columns:minmax(0,1.8fr) minmax(250px,1fr);gap:18px;margin:24px 0;align-items:stretch}.spread-chart,.spread-live{min-width:0;padding:20px;border:1px solid #cedbe9;border-radius:16px;background:white}.spread-chart h3{margin:0 0 12px}.spread-chart p{color:#50667e}.spread-chart svg{width:100%;display:block;min-height:260px;max-height:400px;margin:auto;touch-action:none;user-select:none}.spread-chart svg text{font:22px sans-serif;fill:#334e70}.spread-chart [data-spread-point]{cursor:ew-resize}.spread-mean-line{fill:none;stroke:#b46625;stroke-width:3;stroke-dasharray:6 5;pointer-events:none}.spread-live{background:#eaf0fa}.spread-live>div{padding:14px 16px;background:white;border:2px solid #cad7e8;border-radius:12px;margin-bottom:12px}.spread-live strong{display:block;font-size:30px;margin-top:7px}.spread-live .spread-main-metric{border-color:#365f9d;background:#edf3ff}.spread-live .spread-selected-metric{border-color:#b46625}.spread-records{display:flex;flex-wrap:wrap;gap:10px;margin:20px 0}.spread-records button{padding:10px 16px;border:2px solid #c5d4e8;border-radius:10px;background:white}.spread-records strong{display:block;font-size:24px;margin-top:5px}.spread-records button[aria-pressed=true]{border-color:#b46625;background:#fff1e2}.spread-lab button{min-height:46px;white-space:normal}.spread-lab button:disabled{opacity:.42;cursor:default}.spread-actions,.spread-presets{display:flex;flex-wrap:wrap;gap:12px;align-items:center;margin:20px 0}.spread-edit{padding:20px;border:1px solid #cedbe9;border-radius:14px;background:white}.spread-edit label{display:block;font-weight:650}.spread-edit input[type=range]{display:block;width:100%;height:40px;margin:14px 0}.spread-calculation,.spread-teacher{padding:18px;margin:24px 0;background:white;border:1px solid #c6d5e8;border-radius:12px}.spread-calculation summary,.spread-teacher summary{font-weight:650;cursor:pointer}.spread-table{width:100%;table-layout:fixed;border-collapse:collapse;background:white;margin:20px 0}.spread-table caption{text-align:left;padding:10px 0;font-size:var(--reading,18px)}.spread-table th,.spread-table td{padding:14px 10px;text-align:left;border-bottom:1px solid #dbe4ef;overflow-wrap:anywhere}.spread-table th{text-transform:none;letter-spacing:0;color:#334e70}.spread-table thead,.spread-table .selected,.spread-table tfoot{background:#eaf0fa}.spread-formula{padding:16px;background:#eef4ff;border-left:4px solid #365f9d}.spread-lab fieldset{min-width:0;padding:20px;border:1px solid #bdcee4;border-radius:14px;margin:24px 0}.spread-lab legend{font-size:1.15rem;font-weight:750;padding:0 8px}.spread-lab label[for=spreadAnswer]{display:block}.spread-lab input[type=text]{display:block;max-width:280px;width:100%;font:inherit;padding:12px;margin:12px 0 18px;border:1px solid #afc3df;border-radius:8px;background:white}.spread-feedback{padding:16px;background:white;border-left:4px solid #365f9d}.spread-pair{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;margin:22px 0}.spread-pair article{padding:16px;border:1px solid #c6d5e8;border-radius:12px;background:white;min-width:0}.spread-pair h3{margin:0 0 10px}.spread-pair p{margin:0;font-variant-numeric:tabular-nums}.spread-options{display:flex;flex-wrap:wrap;gap:10px;margin:18px 0}.spread-options label{display:flex;align-items:center;gap:10px;padding:12px 16px;background:white;border:1px solid #cad7e9;border-radius:10px}.spread-reason{display:block;font-weight:650;margin:24px 0}.spread-reason textarea{font:inherit;font-weight:400;width:100%;max-width:100%;min-height:110px;display:block;padding:12px;margin-top:12px;border:1px solid #b7cae3;border-radius:10px;background:white}.spread-teacher li{margin:12px 0}.spread-lab>small{display:block;font-size:1rem;color:#50667e}.spread-lab :is(button,input,textarea,summary):focus-visible{outline:3px solid #b57832;outline-offset:3px}
@media(max-width:1050px){.spread-workbench{grid-template-columns:1fr}.spread-live{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}.spread-live>div{margin:0}.spread-live>p{grid-column:1/-1}}
@media(max-width:650px){.spread-lab{padding:14px}.spread-chart,.spread-live,.spread-edit,.spread-lab fieldset{padding:12px}.spread-chart svg{min-height:0;max-height:none}.spread-chart svg text{font-size:42px}.spread-chart svg .spread-empty-label{font-size:40px}.spread-live,.spread-pair{grid-template-columns:1fr}.spread-records{display:grid;grid-template-columns:repeat(2,minmax(0,1fr))}.spread-records button{padding:10px}.spread-actions,.spread-presets,.spread-options{display:grid}.spread-table th,.spread-table td{padding:12px 6px}.spread-lab legend{font-size:1.1rem}}
@media print{.spread-actions,.spread-presets,.spread-edit,.spread-toggle,.spread-lab fieldset button{display:none}.spread-workbench{grid-template-columns:1fr}.spread-chart{break-inside:avoid}}