.rectangle-cutouts-lab,.cutout-static,.rect-fan-original{--cutout-ink:var(--ink);--cutout-line:var(--line-strong);--cutout-focus:var(--emphasis);--cutout-left:var(--diagram-first);--cutout-right:var(--diagram-third);--cutout-surface:var(--surface);color:var(--cutout-ink)}.cutout-number-row{grid-template-columns:minmax(0,1.2fr) 36px minmax(0,.8fr);align-items:center;gap:.35rem;display:grid}.cutout-number-row svg{width:36px;height:38px}.cutout-number-row strong{overflow-wrap:anywhere}.cutout-ledger-target{fill:none;stroke:var(--cutout-line);stroke-width:1px;stroke-dasharray:2 5}.cutout-block{gap:.75rem;min-width:0;display:grid}.cutout-block p{overflow-wrap:anywhere;margin:.2rem 0}.cutout-diagram,.cutout-circles,.cutout-ledger{width:100%;max-width:430px;height:auto;font:18px var(--font-body);fill:var(--cutout-ink);margin:0 auto;display:block}.cutout-diagram path,.cutout-diagram rect,.cutout-diagram line,.cutout-diagram circle{vector-effect:non-scaling-stroke}.cutout-shade{fill:color-mix(in srgb,var(--cutout-focus) 15%,var(--cutout-surface));stroke:var(--cutout-ink);stroke-width:2px}.cutout-shade-label{font-weight:700}.cutout-blank{fill:var(--cutout-surface);stroke:var(--cutout-ink);stroke-width:2px}.cutout-outline{fill:none;stroke:var(--cutout-ink);stroke-width:2px}.cutout-center{fill:var(--cutout-ink)}.cutout-arrow{fill:none;stroke:var(--cutout-focus);stroke-width:2.4px;stroke-linejoin:round;stroke-linecap:round}.cutout-left-mark{fill:none;stroke:var(--cutout-left);stroke-width:3px}.cutout-right-mark{fill:none;stroke:var(--cutout-right);stroke-width:3px;stroke-dasharray:5 3}.cutout-trace{stroke-width:4px}.cutout-reference-outline,.cutout-origin{fill:none;stroke:var(--cutout-line);stroke-width:1.8px;stroke-dasharray:5 4}.cutout-reference-piece{stroke:var(--cutout-line);stroke-width:2px;fill:var(--surface-soft)}.cutout-reference-piece[data-active=true].cutout-left,.cutout-unit.cutout-left{fill:color-mix(in srgb,var(--cutout-left) 16%,var(--cutout-surface));stroke:var(--cutout-left);stroke-width:2.5px}.cutout-reference-piece[data-active=true].cutout-right,.cutout-unit.cutout-right{fill:color-mix(in srgb,var(--cutout-right) 17%,var(--cutout-surface));stroke:var(--cutout-right);stroke-width:2.5px;stroke-dasharray:5 3}.cutout-ledger text{font-size:18px}.cutout-result{border-left:4px solid var(--cutout-focus);padding:.65rem;font-size:1.1rem;font-weight:650}.cutout-calculation-row{grid-template-columns:36px minmax(0,1fr);align-items:center;gap:.5rem;display:grid}.cutout-calculation-row svg{width:36px;height:38px}.cutout-static{border:1px solid var(--line);border-radius:var(--radius);background:var(--surface);min-width:0;margin:1rem 0;padding:.7rem}.rect-fan-original{max-width:450px;margin:1rem auto}.rect-fan-original figcaption{font-size:var(--text-support);color:var(--muted);text-align:center}.cutout-presets{flex-wrap:wrap;gap:.5rem;display:flex}.cutout-presets button{font:inherit;background:var(--surface);min-height:44px;color:var(--ink);border:1px solid var(--line-strong);cursor:pointer;border-radius:.4rem;padding:.45rem .6rem}.cutout-presets button[aria-pressed=true]{outline:2px solid var(--emphasis);outline-offset:1px}.cutout-answer>summary{cursor:pointer;min-height:44px;padding:.6rem 0}