.lab,.lab-overlay,.lab-scope{--lab-navy:#12294d;--lab-gold:#f5b935;--lab-head:#d9d9d9;--lab-right:#2e7d32;--lab-wrong:#c62828;--lab-sans:"Inter", system-ui, sans-serif;--lab-display:"League Spartan", "League Spartan Fallback", system-ui, sans-serif;--lab-mono:"JetBrains Mono", "Space Mono", ui-monospace, monospace}.lab{background:var(--lab-navy);min-height:100dvh;color:var(--lab-navy);font-family:var(--lab-sans);box-sizing:border-box;padding:16px 16px 24px;overflow-y:auto}.lab *,.lab :before,.lab :after,.lab-overlay *,.lab-overlay :before,.lab-overlay :after{box-sizing:border-box}.lab-header{color:#fff;border-bottom:1px solid #fff;flex-wrap:wrap;align-items:center;gap:12px 16px;max-width:1000px;margin:0 auto 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svg{flex-shrink:0}.lab-feedback[data-tone=right]{color:var(--lab-right)}.lab-feedback[data-tone=wrong]{color:var(--lab-wrong)}.lab-table-wrap{overflow-x:auto}.lab-table{border-collapse:collapse;color:var(--lab-navy);margin:0 auto}.lab-table th,.lab-table td{border:1px solid var(--lab-navy);text-align:center;padding:0}.lab-table thead th{background:var(--lab-head);font-family:var(--lab-display);height:36px;padding:0 8px;font-size:16px;font-weight:700}.lab-table .lab-row-label{text-align:left;font-family:var(--lab-sans);white-space:nowrap;padding:0 12px;font-size:15px;font-weight:600}.lab-table td.lab-cell-num{font-family:var(--lab-mono);height:40px;padding:0 8px;font-size:16px}.lab-table.lab-table-plain td{padding:6px 12px;font-size:15px}.lab-bit-cell{width:64px;height:64px}.lab-bit{width:100%;height:100%;min-height:64px;color:var(--lab-navy);font-family:var(--lab-mono);cursor:pointer;touch-action:manipulation;background:#fff;border:none;border-radius:0;justify-content:center;align-items:center;margin:0;padding:0;font-size:28px;font-weight:500;transition:background-color .12s;display:flex}button.lab-bit{border:2px solid var(--lab-navy);border-radius:2px;width:calc(100% - 12px);height:calc(100% - 12px);min-height:52px;margin:6px}button.lab-bit:not(:disabled):hover{background:#e7ecf4}button.lab-bit:disabled{cursor:default;opacity:1}.lab-bit[data-on=true],button.lab-bit[data-on=true]:not(:disabled):hover{background:var(--bit-on,var(--lab-navy));color:#fff}button.lab-bit[data-on=true]{border-color:var(--bit-on,var(--lab-navy))}.lab-bit[data-grade=right]{box-shadow:inset 0 0 0 3px var(--lab-right)}.lab-bit[data-grade=wrong]{box-shadow:inset 0 0 0 3px 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