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strong{color:var(--navy);font-family:var(--serif);font-size:1.08rem;line-height:1.35}.mp-rank-condition small{color:var(--ink-2);font-family:var(--sans);font-size:.86rem;line-height:1.4}.mp-step-controls{grid-template-columns:repeat(4,minmax(0,1fr));gap:8px;margin-bottom:12px;display:grid}.mp-step-controls button{border:1px solid var(--line);background:var(--card);min-width:0;min-height:58px;color:var(--ink-2);font:680 .8rem/1.25 var(--sans);text-align:left;cursor:pointer;border-radius:11px;align-items:center;gap:8px;padding:9px 10px;display:flex}.mp-step-controls button>span{background:var(--paper-2);width:22px;height:22px;color:var(--ink-2);border-radius:50%;flex:none;place-items:center;font-size:.72rem;display:grid}.mp-step-controls button:hover{border-color:color-mix(in srgb, var(--purple) 48%, var(--line));color:var(--navy)}.mp-step-controls button.active{border-color:var(--purple);background:color-mix(in srgb, var(--purple) 10%, var(--card));color:var(--navy)}.mp-step-controls 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6px}.outer-slice-card.active{border-color:var(--purple);box-shadow:0 0 0 2px color-mix(in srgb, var(--purple) 18%, transparent)}.outer-slice-card.active button{color:var(--purple)}.concept-lab-explanation.compact{min-height:0;padding:15px 17px}.concept-lab-explanation.compact>strong{font-size:1.06rem}.concept-lab-explanation.compact>p{font-size:.93rem}.product-controls{grid-template-columns:repeat(3,minmax(0,1fr))}.product-equation{border:1px solid var(--line);background:color-mix(in srgb, var(--paper-2) 58%, var(--card));border-radius:14px;justify-content:center;align-items:center;gap:12px;margin:0 0 15px;padding:15px;display:flex;overflow-x:auto}.product-result{min-width:150px}.product-grid-kronecker{min-width:220px}.product-grid-kronecker>span:nth-child(4n+2){border-right:3px solid var(--bronze)}.product-grid-kronecker>span:nth-child(n+5):nth-child(-n+8){border-bottom:3px solid var(--bronze)}.product-grid-khatri-rao>span:nth-child(odd){border-left:3px solid 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