.calculus-pyramid{--scene-canvas-height:370px;--role-inner:var(--diagram-first);--role-outer:var(--diagram-second);--role-ink:var(--ink)}.calculus-pyramid-spatial{min-width:0}.calculus-pyramid-canvas-wrap{position:relative}.calculus-pyramid-touch-gate{border-radius:var(--radius-small);width:100%;color:var(--ink);font:inherit;cursor:pointer;touch-action:pan-y;background:0 0;border:0;justify-content:center;align-items:flex-end;padding:18px;display:flex;position:absolute;inset:0}.calculus-pyramid-touch-gate span{border:1px solid var(--line-strong);border-radius:var(--radius-small);background:var(--surface);box-shadow:0 2px 10px var(--shadow-label);padding:12px 14px;font-size:14px}.calculus-pyramid-touch-gate:focus-visible{outline:3px solid var(--accent);outline-offset:-3px}.calculus-pyramid-leave{white-space:normal;width:100%;margin-block:6px}.calculus-pyramid-note{color:var(--muted);margin:10px 0 0;font-size:13px;line-height:1.7}.calculus-pyramid-legend{flex-wrap:wrap;gap:10px 18px;margin:14px 0 4px;font-size:14px;line-height:1.6;display:flex}.calculus-pyramid-legend span{align-items:flex-start;gap:8px;display:flex}.calculus-pyramid-legend span:before{content:"";border:2px solid;flex:0 0 14px;width:14px;height:14px;margin-top:4px}.calculus-pyramid-legend--inner{color:var(--role-inner)}.calculus-pyramid-legend--outer{color:var(--role-outer)}.calculus-pyramid-readout{border:1px solid var(--line);border-radius:var(--radius-small);background:var(--surface-soft);padding:14px}.calculus-pyramid-readout>p:first-child{margin-top:0;font-size:14px;line-height:1.7}.calculus-pyramid-bounds{grid-template-columns:repeat(3,minmax(0,1fr));gap:8px;display:grid}.calculus-pyramid-bound{border:1px solid var(--line);border-radius:var(--radius-small);background:var(--surface);min-width:0;padding:10px 8px}.calculus-pyramid-bound span{font-size:12px;line-height:1.7;display:block}.calculus-pyramid-bound strong{font-variant-numeric:tabular-nums;overflow-wrap:anywhere;margin-top:4px;font-size:clamp(17px,4vw,25px);display:block}.calculus-pyramid-bound--inner{border-top:3px solid var(--role-inner)}.calculus-pyramid-bound--outer{border-top:3px solid var(--role-outer)}.calculus-pyramid-inequality{text-align:center;font-variant-numeric:tabular-nums;overflow-wrap:anywhere;margin:13px 0;font-size:clamp(15px,3.6vw,21px);font-weight:700}.calculus-pyramid-facts{gap:10px;margin:12px 0;display:grid}.calculus-pyramid-facts div{gap:3px;display:grid}.calculus-pyramid-facts dt{color:var(--muted);font-size:13px}.calculus-pyramid-facts dd{font-variant-numeric:tabular-nums;overflow-wrap:anywhere;margin:0;font-size:15px;font-weight:650}.calculus-pyramid-parameters{gap:12px;margin-block:18px;display:grid}.calculus-pyramid-parameters fieldset{border:0;min-width:0;margin:0;padding:0}.calculus-pyramid-parameters legend{margin-bottom:8px;font-size:14px;font-weight:650}.calculus-pyramid-buttons{flex-wrap:wrap;gap:8px;display:flex}.calculus-pyramid-buttons button{min-width:56px;min-height:48px}.calculus-pyramid-buttons [aria-pressed=true]{background:var(--ink);border-color:var(--ink);color:var(--on-ink)}.calculus-pyramid-bridge{grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;margin-block:18px;display:grid}.calculus-pyramid-bridge section{border:1px solid var(--line);border-radius:var(--radius);background:var(--surface-soft);min-width:0;padding:18px}.calculus-pyramid-overline{color:var(--accent);font-size:14px;font-weight:700}.calculus-pyramid-bridge h3{margin:10px 0;font-size:19px;line-height:1.6}.calculus-pyramid-bridge p{margin:10px 0 0;font-size:15px;line-height:1.8}.calculus-pyramid-bridge-note{grid-column:1/-1}.calculus-pyramid-reason{border:1px solid var(--line);border-radius:var(--radius-small);margin-block:16px;padding:14px}.calculus-pyramid-reason h3{margin:0 0 12px;font-size:18px;line-height:1.7}.calculus-pyramid-reason p{margin:10px 0;font-size:15px;line-height:1.85}.calculus-pyramid-reason svg{width:min(100%,340px);height:auto;margin-inline:auto;display:block}.calculus-pyramid-reason svg text{fill:var(--ink);font-size:15px}.calculus-pyramid-base-square{fill:var(--surface-soft);stroke:var(--ink);stroke-width:2px}.calculus-pyramid-section-square{fill:var(--highlight);stroke:var(--role-inner);stroke-width:3px}.calculus-pyramid-limit-formulas{gap:8px;display:grid}.calculus-pyramid-limit-formulas p{background:var(--surface-soft);border-radius:var(--radius-small);margin:0;padding:10px}.calculus-pyramid-limit-formulas span{color:var(--muted);font-size:13px;display:block}.calculus-pyramid-limit-formulas strong{overflow-wrap:anywhere;margin-top:4px;font-size:16px;display:block}.calculus-pyramid-check{border-top:1px solid var(--line);margin-top:18px;padding-top:8px}.calculus-pyramid-check summary{cursor:pointer;min-height:48px;padding-block:10px;font-weight:650;line-height:1.7}.calculus-pyramid-check p{font-size:15px;line-height:1.8}@media (width<=560px){.calculus-pyramid{--scene-canvas-height:285px}.calculus-pyramid-bridge{grid-template-columns:1fr}.calculus-pyramid-readout{padding:10px}.calculus-pyramid-bounds{gap:4px}.calculus-pyramid-bound{padding:8px 5px}.calculus-pyramid-bound span{font-size:11px}.calculus-pyramid-legend{font-size:13px}}