._lab_dszal_1{color:#183047;max-width:1120px;margin:0 auto;padding:clamp(16px,3vw,36px);line-height:1.65}._lab_dszal_1 *,._summary_dszal_9 *{box-sizing:border-box}._hero_dszal_12{background:linear-gradient(125deg,#eff8fa,#f1edff);border:1px solid #d9e5ec;border-radius:24px;margin-bottom:24px;padding:clamp(20px,4vw,36px)}._eyebrow_dszal_19{letter-spacing:.12em;text-transform:uppercase;color:#527073;margin:0 0 8px;font-size:.76rem;font-weight:800}._hero_dszal_12 h1{letter-spacing:-.035em;margin:0 0 14px;font-size:clamp(1.75rem,4vw,2.6rem);line-height:1.2}._hero_dszal_12 p{max-width:760px;margin:8px 0}._muted_dszal_37{color:#536578;font-size:.9rem}._filters_dszal_41,._actions_dszal_42,._chips_dszal_43{flex-wrap:wrap;align-items:center;gap:10px;display:flex}._filters_dszal_41{margin:20px 0}._lab_dszal_1 button,._summary_dszal_9 button,._visual_dszal_54 button{font:inherit;cursor:pointer}._button_dszal_58,._secondary_dszal_59,._filter_dszal_41{text-align:center;white-space:normal;border:1px solid #b7c9d6;border-radius:12px;justify-content:center;align-items:center;gap:8px;min-height:44px;padding:10px 16px;font-weight:700;line-height:1.4;text-decoration:none;display:inline-flex}._button_dszal_58{color:#fff;background:#204f65;border-color:#204f65}._button_dszal_58:hover{background:#153d50}._secondary_dszal_59,._filter_dszal_41{color:#244158;background:#fff}._secondary_dszal_59:hover,._filter_dszal_41:hover{background:#edf6f7}._filter_dszal_41[aria-pressed=true]{color:#fff;background:#204f65;border-color:#204f65}._lab_dszal_1 button:disabled,._summary_dszal_9 button:disabled,._visual_dszal_54 button:disabled{opacity:.55;cursor:wait}:is(._lab_dszal_1 a:focus-visible,._lab_dszal_1 button:focus-visible,._summary_dszal_9 a:focus-visible,._summary_dszal_9 button:focus-visible,._visual_dszal_54 button:focus-visible,._lab_dszal_1 input:focus-visible,._visual_dszal_54 input:focus-visible){outline-offset:3px;outline:3px solid 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span{background:#418a84;height:100%;display:block}._panel_dszal_178,._summary_dszal_9{background:#fff;border:1px solid #d4e0e7;border-radius:20px;min-width:0;padding:clamp(18px,3vw,28px)}._panel_dszal_178{margin-top:20px}._panel_dszal_178 h2,._summary_dszal_9 h2{margin:0 0 10px;font-size:1.3rem;line-height:1.4}._panel_dszal_178 h3,._summary_dszal_9 h3{margin:14px 0 8px;font-size:1.05rem}._panel_dszal_178 p,._summary_dszal_9 p{margin:8px 0}._packHeader_dszal_204{justify-content:space-between;align-items:flex-start;gap:16px;margin-bottom:18px;display:flex}._packHeader_dszal_204 h2{margin:8px 0;font-size:1.5rem}._stepTrack_dszal_215{flex-wrap:wrap;gap:7px;margin:16px 0;padding:0;list-style:none;display:flex}._stepTrack_dszal_215 li{color:#4c6271;background:#edf1f5;border-radius:8px;padding:5px 10px;font-size:.8rem}._stepTrack_dszal_215 ._activeStep_dszal_230{color:#fff;background:#204f65}._question_dszal_234{overflow-wrap:anywhere;font-size:1.2rem;line-height:1.85;margin:16px 0 24px!important}._answerLabel_dszal_240{margin-bottom:7px;font-weight:700;display:block}._answerInput_dszal_245{color:#17334c;background:#fff;border:2px solid #9db3c5;border-radius:11px;width:100%;max-width:380px;min-height:48px;padding:12px 14px;font-size:1.2rem;display:block}._fieldset_dszal_257{border:0;margin:22px 0;padding:0}._fieldset_dszal_257 legend{margin:0 0 12px;padding:0;font-weight:700}._reasons_dszal_267{gap:9px;display:grid}._reason_dszal_267{cursor:pointer;background:#fff;border:1px solid #c9d7e2;border-radius:12px;align-items:flex-start;gap:12px;padding:13px;display:flex}._reason_dszal_267:has(input:checked){background:#f1f5fc;border:2px solid #4b698b;padding:12px}._reason_dszal_267 input{accent-color:#244e67;flex:none;width:18px;height:18px;margin-top:6px}._feedback_dszal_293{background:#eef8f1;border:1px solid #a7cbb9;border-radius:16px;margin:20px 0;padding:20px}._feedback_dszal_293[data-correct=false]{background:#fff6e9;border-color:#dfbe8b}._feedback_dszal_293 h3{margin-top:0}._steps_dszal_307{margin:14px 0;padding-left:24px}._steps_dszal_307 li{padding:7px 0 7px 4px}._hint_dszal_314{background:#f2effc;border:1px solid #d4c9e9;border-radius:14px;margin:16px 0;padding:15px}._error_dszal_321{color:#793e2c;background:#fff2ee;border:1px solid #e1b1a1;border-radius:13px;margin:16px 0;padding:16px}._waiting_dszal_329{background:#f0f7fa;border-radius:15px;margin-top:20px;padding:22px}._evidence_dszal_335{grid-template-columns:repeat(4,minmax(0,1fr));gap:10px;margin:18px 0;display:grid}._evidence_dszal_335 div{background:#f3f6f8;border-radius:12px;padding:14px}._evidence_dszal_335 strong{color:#204f65;font-size:1.5rem;display:block}._evidence_dszal_335 span{color:#526779;font-size:.8rem;display:block}._summary_dszal_9{margin:18px 0}._summaryHeader_dszal_359{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:16px;display:flex}._summaryList_dszal_366{gap:10px;margin:16px 0;padding:0;list-style:none;display:grid}._summaryItem_dszal_373{border-top:1px solid #e1e9ee;justify-content:space-between;align-items:center;gap:14px;padding:13px 0;display:flex}._parentCard_dszal_381{background:#f6f4fd;border:1px solid #e2d9f0;border-radius:14px;margin-top:14px;padding:18px}._parentCard_dszal_381 dl{margin:0}._parentCard_dszal_381 dt{margin-top:13px;font-size:.9rem;font-weight:750}._parentCard_dszal_381 dd{margin:4px 0 0;line-height:1.65}._visual_dszal_54{background:#f3f8fa;border:1px solid #ccdee5;border-radius:16px;min-width:0;margin:20px 0;padding:20px}._visual_dszal_54 h3{margin-top:0}._visual_dszal_54 svg{width:100%;max-height:230px;margin:18px auto;display:block;overflow:visible}._control_dszal_418{margin:18px 0}._control_dszal_418 label{margin-bottom:8px;font-weight:700;display:block}._control_dszal_418 input[type=range]{accent-color:#267a83;cursor:grab;width:100%;max-width:540px;min-height:36px}._equation_dszal_433{text-align:center;background:#fff;border:1px solid #ccdee5;border-radius:10px;margin:12px 0;padding:14px;font-size:1.3rem}._formulaRows_dszal_442{background:#fff;border:1px solid #ccdee5;border-radius:12px;gap:0;margin:16px 0;padding:0;list-style:none;display:grid}._formulaRow_dszal_442{text-align:center;justify-items:center;gap:10px;min-width:0;padding:14px 10px;font-size:1.15rem;display:grid}._formulaRow_dszal_442+._formulaRow_dszal_442{border-top:1px dashed #ccdee5}._formulaRow_dszal_442>span:first-child{color:#526c7a;font-size:.8rem;font-weight:650;line-height:1.5}._packHeader_dszal_204 h1{margin:8px 0;font-size:clamp(1.35rem,4vw,1.65rem);line-height:1.35}._strips_dszal_475{gap:12px;margin:20px 0;display:grid}._stripRow_dszal_480{grid-template-columns:60px 1fr;align-items:center;gap:10px;display:grid}._strip_dszal_475{background:#fff;border:2px solid #42838b;border-radius:6px;height:36px;display:flex;overflow:hidden}._strip_dszal_475 i{border-right:1px solid #809fab;flex:1}._strip_dszal_475 i:last-child{border-right:0}._filled_dszal_501{background:#6ebeb4}._stripRow_dszal_480:nth-child(2) ._filled_dszal_501{background:#b19cda}._ratioTable_dszal_507{border-collapse:collapse;background:#fff;width:100%;margin:16px 0}._ratioTable_dszal_507 th,._ratioTable_dszal_507 td{text-align:center;border:1px solid #cbdde2;padding:12px}._ratioTable_dszal_507 th{background:#e3f1f3}._visCaption_dszal_522{color:#375a68;padding:10px 0;font-size:.9rem}._inlineLink_dszal_527{color:#254f83;text-underline-offset:3px;text-decoration:underline}._smallButton_dszal_532{min-height:40px;padding:7px 11px;font-size:.85rem}._loading_dszal_537{color:#536578;padding:26px 0}._englishNote_dszal_541{color:#5d5270;border-left:3px solid #8b71b0;padding-left:12px;font-size:.9rem}._packHero_dszal_547{border-top:5px solid #468b87}._back_dszal_550{margin-bottom:14px}._parentDetails_dszal_553 summary{cursor:pointer;color:#254f83;padding:10px 0;font-weight:750}._statusLine_dszal_559{min-height:1.6em}._grid_dszal_113 .math-expression,._panel_dszal_178 .math-expression,._summary_dszal_9 .math-expression{max-width:100%}@media (max-width:880px){._grid_dszal_113,._evidence_dszal_335{grid-template-columns:repeat(2,minmax(0,1fr))}}@media (max-width:540px){._grid_dszal_113{grid-template-columns:1fr}._lab_dszal_1{padding:16px}._hero_dszal_12{padding:22px}._packHeader_dszal_204{display:block}._packHeader_dszal_204 ._secondary_dszal_59{margin-top:12px}._actions_dszal_42>*{flex:130px}._summaryItem_dszal_373{flex-direction:column;align-items:flex-start}._summaryItem_dszal_373 ._secondary_dszal_59{width:100%}._visual_dszal_54{padding:14px}._stripRow_dszal_480{grid-template-columns:48px 1fr}._panel_dszal_178{padding:18px}._filter_dszal_41{padding:9px 12px;font-size:.9rem}._question_dszal_234{font-size:1.1rem}}@media (prefers-reduced-motion:reduce){._lab_dszal_1 *,._summary_dszal_9 *{scroll-behavior:auto;transition:none}}._packCard_dszal_118[data-group=fractions]{border-top:4px solid #4c9293}._packCard_dszal_118[data-group=integers]{border-top:4px solid #a682bc}._packCard_dszal_118[data-group=ratios]{border-top:4px solid #cfad61}._packCard_dszal_118[data-group=equations]{border-top:4px solid #648db9}._equation_dszal_433{max-width:100%;overflow-x:auto}._summary_dszal_9,._panel_dszal_178,._packCard_dszal_118{overflow-wrap:anywhere}._summaryItem_dszal_373>div{min-width:0}._summary_dszal_9 ._math-copy_dszal_649{max-width:100%}._lab_dszal_1 .math-expression,._summary_dszal_9 .math-expression{white-space:normal;overflow-wrap:normal;word-break:normal}._lab_dszal_1 .math-expression>.katex,._summary_dszal_9 .math-expression>.katex,._lab_dszal_1 .math-expression>.katex>.katex-html,._summary_dszal_9 .math-expression>.katex>.katex-html{white-space:normal}._lab_dszal_1 .math-expression>.katex>.katex-html>.katex-base,._summary_dszal_9 .math-expression>.katex>.katex-html>.katex-base{white-space:nowrap;margin-block:.1em}