.lab-tabs{margin:0 0 2rem}.lab-tabs[hidden]{display:none}.lab-tabs__list{border-bottom:1px solid var(--tint-border);scrollbar-width:none;gap:.25rem;display:flex;overflow-x:auto}.lab-tabs__list::-webkit-scrollbar{display:none}.lab-tabs__tab{font:inherit;color:var(--muted);white-space:nowrap;cursor:pointer;background:0 0;border:0;border-bottom:2px solid #0000;flex:none;margin-bottom:-1px;padding:.75rem 1rem;font-size:15px;font-weight:600;transition:color .15s,border-color .15s}.lab-tabs__tab:hover{color:var(--ink)}.lab-tabs__tab[aria-selected=true]{color:var(--brand-text);border-bottom-color:var(--brand-text)}.lab-tabs__tab:focus-visible{outline:2px solid var(--brand-text);outline-offset:-3px;border-radius:2px}.lab-panel:focus{outline:none}.lab-panel:focus-visible{outline:2px solid var(--brand-text);outline-offset:4px}@media print{.lab-tabs{display:none}.lab-panel[hidden]{display:block!important}}.lab-outcomes{background:var(--tint);border-radius:var(--r);margin:0 0 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li{color:#5a6b85;padding:.1rem 0 .1rem 1.5rem;font-size:15px;line-height:1.6;position:relative}.lab-mistakes__list li+li{margin-top:.65rem}.lab-mistakes__list li:before{content:"";background:var(--danger);border-radius:50%;width:.4rem;height:.4rem;position:absolute;top:.72em;left:.3rem}.lab-check{background:var(--tint);border-radius:var(--r);isolation:isolate;margin:0 0 3.5rem;padding:2.25rem clamp(1.25rem,3vw,2.25rem)}.lab-check__title{margin:0 0 .5rem}.lab-check__lead{color:#5a6b85;max-width:60ch;margin:0;font-size:15px;line-height:1.6}.lab-check__list{counter-reset:labq;margin:2.5rem 0 0;padding:0;list-style:none}.lab-q+.lab-q{margin-top:3rem}.lab-q__prompt{counter-increment:labq;color:var(--ink);max-width:62ch;margin:0 0 1.1rem;font-size:16px;font-weight:600;line-height:1.5}.lab-q__prompt:before{content:counter(labq) ".";color:var(--accent-text);margin-right:.45rem;font-weight:700}.lab-q__options{flex-direction:column;gap:.6rem;display:flex}.lab-opt{text-align:left;width:100%;font:inherit;color:var(--ink);border:1px solid var(--tint-border);border-radius:var(--r);cursor:pointer;background:#fff;align-items:flex-start;gap:.7rem;padding:.85rem 1rem;font-size:15px;line-height:1.45;transition:border-color .15s,background-color .15s;display:flex}.lab-opt:hover:not([aria-disabled=true]){border-color:var(--brand)}.lab-opt:focus-visible{outline:2px solid var(--brand);outline-offset:2px}.lab-opt[aria-disabled=true]{cursor:default}.lab-opt__mark{border:2px solid #c3d0da;border-radius:50%;flex:none;width:18px;height:18px;margin-top:.12em;position:relative}.lab-opt__label{min-width:0}.lab-q.is-answered .lab-opt{color:#5a6b85;background:0 0}.lab-q.is-answered 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.lab-opt__mark:after{content:"";background:var(--accent-text);border-radius:50%;position:absolute;inset:3px}.lab-q__verdict{margin:1.15rem 0 0;font-size:14px;font-weight:700}.lab-q__verdict.is-right{color:var(--success)}.lab-q__verdict.is-wrong{color:var(--danger)}.lab-q__verdict.is-judgement{color:var(--accent-text)}.lab-q__reveal{background:var(--wash);border-radius:var(--r);color:var(--ink);margin:.65rem 0 0;padding:1rem 1.15rem;font-size:15px;line-height:1.6}.lab-check__again{margin:2rem 0 0;display:none}.lab-check__again.is-on{display:block}.lab-check__again-btn{border-radius:var(--r);font:inherit;color:#5a6b85;cursor:pointer;background:0 0;border:0;align-items:center;gap:.5rem;margin-left:-.75rem;padding:.5rem .75rem;font-size:14px;font-weight:600;transition:background-color .15s,color .15s;display:inline-flex}.lab-check__again-btn:hover{color:var(--ink);background:#fff}.lab-check__again-btn:focus-visible{outline:2px solid 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lab-reveal{0%{opacity:0;transform:translateY(-3px)}to{opacity:1;transform:none}}.lab-templates__head{flex-wrap:wrap;justify-content:space-between;align-items:baseline;gap:1rem;display:flex}.lab-templates__all{border:1px solid var(--tint-border);border-radius:var(--r);font:inherit;color:var(--ink);cursor:pointer;background:#fff;flex-shrink:0;align-items:center;gap:.5rem;padding:.5rem .85rem;font-size:14px;font-weight:600;transition:background-color .15s,border-color .15s,color .15s;display:inline-flex}.lab-templates__all:hover:not(:disabled){border-color:var(--brand);color:var(--brand-text)}.lab-templates__all:focus-visible{outline:2px solid var(--brand-text);outline-offset:2px}.lab-templates__all:disabled{color:var(--muted);cursor:default}.lab-templates__all i{color:var(--brand-text);font-size:13px}.lab-templates__all:disabled i{color:var(--muted)}.lab-shell--with-coach{--lab-rail:380px;--lab-chrome:74px;grid-template-columns:minmax(0, 1fr) var(--lab-rail);align-items:start;gap:0;transition:grid-template-columns .18s;display:grid}@media (prefers-reduced-motion:reduce){.lab-shell--with-coach{transition:none}}.lab-shell--with-coach.is-collapsed{--lab-rail:56px}.lab-shell .lab-lesson{grid-column:1}.lab-rail{top:var(--lab-chrome);height:calc(100dvh - var(--lab-chrome));border-left:1px solid var(--tint-border);background:#fff;flex-direction:column;min-height:0;display:flex;position:sticky;overflow:hidden}.lab-rail__head{flex-shrink:0;align-items:center;gap:.5rem;padding:1.5rem 1.75rem 1rem;display:flex}.lab-rail__title{color:var(--ink);white-space:nowrap;flex:auto;min-width:0;margin:0;font-size:15px;font-weight:700;transition:opacity .12s;overflow:hidden}.lab-rail__btn{border-radius:var(--r);width:30px;height:30px;color:var(--muted);cursor:pointer;background:0 0;border:0;flex-shrink:0;justify-content:center;align-items:center;font-size:13px;transition:background-color .15s,color .15s;display:flex}.lab-rail__btn:hover{background:var(--tint);color:var(--ink)}.lab-rail__btn:focus-visible{outline:2px solid var(--brand-text);outline-offset:1px}.lab-rail__btn[hidden]{display:none}#lab-chat-clear:hover{color:#8c2f22;background:#fdecea}.lab-rail__body{flex-direction:column;flex:auto;min-height:0;display:flex}.is-collapsed .lab-rail__body{display:none}.is-collapsed .lab-rail__title{opacity:0}.is-collapsed #lab-chat-clear{display:none}.is-collapsed .lab-rail__head{padding:1.5rem .75rem 1rem}#lab-chat-collapse i{transform:scaleX(-1)}.is-collapsed #lab-chat-collapse i{transform:none}@media (prefers-reduced-motion:reduce){.lab-rail__title{transition:none}}.lab-rail__log{overscroll-behavior:none;scrollbar-width:none;-ms-overflow-style:none;flex-direction:column;flex:auto;gap:.7rem;padding:.25rem 1.75rem 1.25rem;display:flex;overflow-y:auto}.lab-rail__log::-webkit-scrollbar{width:0;height:0;display:none}.lab-rail__ask{flex-shrink:0;padding:0 1.75rem 1.75rem}.lab-rail__send{bottom:2.2rem;right:2.2rem}@media (width<=1180px){.lab-shell--with-coach{display:block}.lab-rail{border-left:0;max-width:960px;max-height:none;margin:0 auto 4rem;padding:0 clamp(1.25rem,4vw,3.5rem);position:static;height:auto!important}.lab-rail__head{padding-left:0;padding-right:0}#lab-chat-collapse{display:none}.is-collapsed .lab-rail__body{display:flex}.is-collapsed .lab-rail__title{opacity:1}.is-collapsed #lab-chat-clear{display:flex}.lab-rail__log{max-height:420px;padding-left:0;padding-right:0;overflow-y:auto}.lab-rail__ask{padding-left:0;padding-right:0}.lab-rail__send{bottom:.45rem;right:.45rem}.lab-shell .lab-lesson{grid-column:auto}}