._shell_1t4yu_1{color:#2d2321;background:#fffaf0;min-height:100vh;overflow:hidden}._topbar_1t4yu_2{border-bottom:1px solid #241b181c;justify-content:space-between;align-items:center;gap:24px;width:min(1180px,100% - 48px);min-height:92px;margin:auto;display:flex}._brand_1t4yu_3{width:116px;height:72px;display:inline-flex}._brand_1t4yu_3 img{object-fit:contain;width:100%;height:100%}._meta_1t4yu_4{color:#796b66;align-items:center;gap:9px;font-size:14px;display:flex}._meta_1t4yu_4 i{background:#ffa23f;border-radius:50%;width:4px;height:4px}._lesson_1t4yu_5{width:min(1180px,100% - 48px);margin:auto;padding:28px 0 72px}._back_1t4yu_6{color:#104888;align-items:center;gap:8px;margin-bottom:24px;font-weight:600;text-decoration:none;display:inline-flex}._intro_1t4yu_7{grid-template-columns:minmax(0,1fr) 300px;align-items:center;gap:38px;margin-bottom:28px;display:grid}._introCopy_1t4yu_7{max-width:720px}._eyebrow_1t4yu_8{color:#e9872e;margin:0 0 8px;font-size:13px;font-weight:600}._intro_1t4yu_7 h1{letter-spacing:-.025em;margin:0;font-size:clamp(36px,5vw,58px);font-weight:600;line-height:1.18}._introCopy_1t4yu_7>p:last-child{color:#796b66;margin:14px 0 0;font-size:18px;line-height:1.85}._cover_1t4yu_9{aspect-ratio:3/2;object-fit:cover;border-radius:30px;width:100%;animation:6s ease-in-out infinite _optixFloat_1t4yu_1;box-shadow:0 18px 46px #372c2624}._lab_1t4yu_10{background:#ffffffe0;border:1px solid #1048881f;border-radius:38px;overflow:hidden;box-shadow:0 30px 80px #372c261c}._toolbar_1t4yu_10{border-bottom:1px solid #241b181c;justify-content:space-between;align-items:center;gap:20px;min-height:72px;padding:0 28px;display:flex}._status_1t4yu_10{color:#796b66;align-items:center;gap:9px;display:flex}._statusDot_1t4yu_10{background:#d8d2cc;border-radius:50%;width:11px;height:11px;box-shadow:0 0 0 5px #d8d2cc40}._statusDot_1t4yu_10._ready_1t4yu_10{background:#ffa23f;box-shadow:0 0 0 5px #ffa23f33}._reset_1t4yu_10{color:#104888;cursor:pointer;background:0 0;border:0;min-height:44px}._stage_1t4yu_11{touch-action:none;-webkit-user-select:none;user-select:none;background:linear-gradient(164deg,#c9c3e470 0 19%,#0000 19.2%),radial-gradient(circle at 80% 76%,#b9eff459,#0000 30%),#f5f4f6;min-height:520px;position:relative;overflow:hidden}._paper_1t4yu_12{background:#fff8f5c7;border:1px solid #1048881f;border-radius:34px;position:absolute;inset:14% 7% 12%;transform:perspective(1200px)rotateX(6deg);box-shadow:0 12px #dcc5cb80,0 30px 40px #372c261a}._benchAsset_1t4yu_13{z-index:2;pointer-events:none;filter:drop-shadow(0 18px 13px #1048882e);width:76%;height:auto;position:absolute;top:58%;left:12%}._candleAsset_1t4yu_14{z-index:4;width:110px;height:180px;position:absolute;top:43%;left:20%;transform:translate(-50%,-50%)}._candleAsset_1t4yu_14>img,._lensAsset_1t4yu_15>img{object-fit:contain;pointer-events:none;filter:drop-shadow(0 15px 14px #302b4329);width:100%;height:100%}._flame_1t4yu_16{z-index:6;filter:drop-shadow(0 0 17px #ffa23fcc);background:radial-gradient(circle at 50% 68%,#fff6a0 0 22%,#ffa23f 24% 67%,#f17130 69%);border-radius:70% 30% 60% 40%/80% 50% 50% 20%;width:27px;height:48px;animation:.75s ease-in-out infinite alternate _optixFlame_1t4yu_1;position:absolute;top:-7px;left:50%;transform:translate(-50%)}._candleAsset_1t4yu_14 small,._lensAsset_1t4yu_15 small,._screen_1t4yu_17 small{white-space:nowrap;color:#104888;font-weight:700;position:absolute}._candleAsset_1t4yu_14 small{bottom:-27px;left:50%;transform:translate(-50%)}._lensAsset_1t4yu_15{z-index:4;width:148px;height:215px;position:absolute;top:43%;left:50%;transform:translate(-50%,-50%)}._lensAsset_1t4yu_15 small{bottom:-27px;left:50%;transform:translate(-50%)}._rays_1t4yu_21{z-index:3;pointer-events:none;direction:ltr;width:100%;height:100%;position:absolute;inset:0}._rays_1t4yu_21 path{vector-effect:non-scaling-stroke;fill:none;stroke:#ffa23f;stroke-width:4px;stroke-linecap:round;stroke-linejoin:round;opacity:.72;filter:drop-shadow(0 0 6px #ffa23f61);transition:d .15s linear}._rays_1t4yu_21 ._axisRay_1t4yu_21{stroke:#104888;stroke-width:2px;stroke-dasharray:9 12;opacity:.22}._screen_1t4yu_17{z-index:6;cursor:grab;touch-action:none;background:0 0;border:0;width:132px;height:230px;padding:0;transition:filter .18s,transform .18s;position:absolute;top:43%;transform:translate(-50%,-50%)}._screenAsset_1t4yu_23{object-fit:contain;pointer-events:none;filter:drop-shadow(0 20px 18px #10488830);width:100%;height:100%;position:absolute;inset:0}._screen_1t4yu_17._dragging_1t4yu_24{z-index:12;cursor:grabbing;filter:drop-shadow(0 0 18px #ffa23f66);transform:translate(-50%,-50%)scale(1.045)rotate(-1deg)}._screen_1t4yu_17 small{bottom:-27px;left:50%;transform:translate(-50%)}._grip_1t4yu_26{z-index:8;color:#104888;background:#fffc;border-radius:999px;padding:3px 8px;font-size:17px;font-style:normal;position:absolute;bottom:11%;left:50%;transform:translate(-50%)}._projectedImage_1t4yu_27{z-index:7;transform-origin:50%;width:45px;height:95px;transition:filter .16s,opacity .16s,transform .16s;position:absolute;top:46%;left:50%}._projectedImage_1t4yu_27>img{object-fit:contain;width:100%;height:100%;position:absolute;inset:0}._projectedImage_1t4yu_27>i{filter:drop-shadow(0 0 6px #ffa23fb3);background:#f16d31;border-radius:70% 30% 60% 40%;width:11px;height:22px;position:absolute;top:5%;left:50%;transform:translate(-50%)}._dragHint_1t4yu_30{z-index:6;color:#796b66;pointer-events:none;white-space:nowrap;background:#ffffffe0;border-radius:16px;align-items:center;gap:10px;padding:10px 15px;display:flex;position:absolute;bottom:23px;left:50%;transform:translate(-50%);box-shadow:0 8px 19px #372c261a}._dragHint_1t4yu_30 span{background:#ffa23f;border-radius:50%;width:10px;height:10px;animation:2s ease-in-out infinite _optixHint_1t4yu_1}._controls_1t4yu_31{border-top:1px solid #241b181c;grid-template-columns:minmax(270px,1fr) minmax(280px,1.1fr) auto;align-items:center;gap:24px;padding:28px;display:grid}._controlHeading_1t4yu_31{justify-content:space-between;gap:16px;margin-bottom:10px;display:flex}._controlHeading_1t4yu_31 label,._controlHeading_1t4yu_31 output{font-weight:700}._controlHeading_1t4yu_31 output{color:#104888}._positionControl_1t4yu_31 input{accent-color:#ffa23f;cursor:grab;width:100%;min-height:30px}._focusMeter_1t4yu_32{grid-template-columns:1fr auto;align-items:center;gap:7px 12px;margin-top:9px;display:grid}._focusMeter_1t4yu_32>span{background:#e5e0dc;border-radius:9px;height:9px;overflow:hidden}._focusMeter_1t4yu_32>span i{border-radius:inherit;background:linear-gradient(90deg,#b9eff4,#104888);height:100%;transition:width .2s;display:block}._focusMeter_1t4yu_32 b{color:#104888}._focusMeter_1t4yu_32 small{color:#796b66;grid-column:1/-1}._feedback_1t4yu_33{color:#796b66;background:#fffaf0;border-radius:21px;align-items:center;gap:13px;min-height:78px;padding:15px 17px;display:flex}._feedback_1t4yu_33>span{color:#104888;background:#b9eff4;border-radius:50%;flex:none;place-items:center;width:38px;height:38px;display:grid}._feedback_1t4yu_33 p{margin:0;line-height:1.65}._feedback_1t4yu_33._correct_1t4yu_33{color:#244a3e;background:#a9ead559}._feedback_1t4yu_33._retry_1t4yu_33{background:#ffa23f24}._validate_1t4yu_34{color:#fff;cursor:pointer;white-space:nowrap;background:#104888;border:0;border-radius:19px;min-height:58px;padding:12px 24px;font-weight:700;box-shadow:0 10px 20px #10488833}._outcomes_1t4yu_35{border-top:1px solid #241b181c;grid-template-columns:.8fr 1.2fr;gap:40px;margin-top:44px;padding:34px 0;display:grid}._outcomes_1t4yu_35 h2{margin:0;font-size:28px}._outcomes_1t4yu_35 ul{gap:13px;margin:0;padding:0;list-style:none;display:grid}._outcomes_1t4yu_35 li{align-items:center;gap:12px;display:flex}._outcomes_1t4yu_35 li span{color:#104888;background:#b9eff4;border-radius:11px;flex:none;place-items:center;width:31px;height:31px;font-weight:700;display:grid}@keyframes _optixFloat_1t4yu_1{50%{transform:translateY(-6px)rotate(.5deg)}}@keyframes _optixFlame_1t4yu_1{to{transform:translate(-50%)scale(.92,1.07)rotate(3deg)}}@keyframes _optixHint_1t4yu_1{50%{transform:translate(10px)}}@media (width<=850px){._intro_1t4yu_7{grid-template-columns:1fr 220px}._controls_1t4yu_31{grid-template-columns:1fr 1fr}._validate_1t4yu_34{grid-column:1/-1}._outcomes_1t4yu_35{grid-template-columns:1fr}._stage_1t4yu_11{min-height:470px}}@media (width<=600px){._topbar_1t4yu_2,._lesson_1t4yu_5{width:min(100% - 28px,1180px)}._intro_1t4yu_7{grid-template-columns:1fr}._cover_1t4yu_9{max-height:230px}._intro_1t4yu_7 h1{font-size:38px}._stage_1t4yu_11{min-height:430px}._paper_1t4yu_12{inset-inline:2%}._benchAsset_1t4yu_13{width:86%;left:7%}._candleAsset_1t4yu_14{width:86px;height:150px;left:18%}._lensAsset_1t4yu_15{width:116px;height:184px}._screen_1t4yu_17{width:104px;height:188px}._projectedImage_1t4yu_27{width:34px;height:73px}._controls_1t4yu_31{grid-template-columns:1fr;padding:20px 16px}._validate_1t4yu_34{grid-column:auto;width:100%}._toolbar_1t4yu_10{padding:0 18px}._dragHint_1t4yu_30{font-size:12px}}@media (prefers-reduced-motion:reduce){._cover_1t4yu_9,._flame_1t4yu_16,._dragHint_1t4yu_30 span{animation:none!important}}._toolbarActions_1t4yu_40{flex-wrap:wrap;align-items:center;gap:10px;display:flex}