._page_j1rh9_1{--ink:#292238;--surface:#fff;--soft:#f6f1fc;--line:#d9cce8;--purple:#6936a5;width:calc(100% - 40px);max-width:1080px;color:var(--ink);overflow-wrap:anywhere;margin:32px auto 72px;font-size:18px;line-height:1.8}._page_j1rh9_1 *{box-sizing:border-box}._page_j1rh9_1 a{color:var(--purple);text-underline-offset:4px}._breadcrumb_j1rh9_1{margin-bottom:22px;font-size:15px}._hero_j1rh9_1{background:linear-gradient(125deg,var(--soft),var(--surface));border:1px solid var(--line);border-radius:24px;padding:38px}._hero_j1rh9_1 h1{letter-spacing:-1.4px;margin:16px 0 22px;font-size:clamp(32px,5vw,54px);line-height:1.12}._hero_j1rh9_1 p{max-width:730px;font-size:20px}._hero_j1rh9_1 small,._card_j1rh9_1>small,._lab_j1rh9_1>small,._lessonCard_j1rh9_1 small{letter-spacing:1.5px;color:var(--purple);font-size:12px;font-weight:800}._card_j1rh9_1{background:var(--surface);border:1px solid var(--line);border-radius:20px;margin:26px 0;padding:32px;scroll-margin-top:100px}._card_j1rh9_1 h2{margin:12px 0;font-size:31px;line-height:1.3}._card_j1rh9_1 h3{font-size:22px;line-height:1.35}._card_j1rh9_1 p{margin:16px 0}._goal_j1rh9_1{color:var(--purple);font-size:21px;font-weight:650}._grid_j1rh9_1{grid-template-columns:repeat(2,minmax(0,1fr));gap:18px;display:grid}._lessonCard_j1rh9_1{border:1px solid var(--line);background:var(--soft);border-radius:16px;padding:24px;text-decoration:none;display:block}._lessonCard_j1rh9_1 h3{color:var(--ink);margin:8px 0}._lessonCard_j1rh9_1 p{color:var(--ink);font-size:16px}._lessonCard_j1rh9_1:hover{border-color:var(--purple)}._actions_j1rh9_1,._toolbar_j1rh9_1{flex-wrap:wrap;align-items:center;gap:12px;margin:18px 0;display:flex}._page_j1rh9_1 button,._actions_j1rh9_1 a{font:inherit;cursor:pointer;border:1px solid var(--line);background:var(--surface);color:var(--purple);border-radius:10px;min-height:44px;padding:12px 16px;font-weight:650;line-height:1.4}._actions_j1rh9_1 a{text-decoration:none}._page_j1rh9_1 ._primary_j1rh9_1{background:var(--purple);color:#fff;border-color:var(--purple)}._page_j1rh9_1 button:disabled{opacity:.5;cursor:not-allowed}._page_j1rh9_1 button[aria-pressed=true],._page_j1rh9_1 button[aria-current=step]{background:var(--purple);color:#fff;border-color:var(--purple)}._page_j1rh9_1 :is(button,a,input,select,summary):focus-visible{outline-offset:4px;outline:3px solid #c98800}._steps_j1rh9_1{grid-template-columns:repeat(4,minmax(0,1fr));gap:8px;margin:24px 0 12px;display:grid}._steps_j1rh9_1 button{text-align:left;font-size:14px}._meta_j1rh9_1{font-size:14px}._rules_j1rh9_1{background:var(--soft);border-radius:14px;margin:24px 0;padding:10px 24px}._rules_j1rh9_1 li{margin:8px 0}._worked_j1rh9_1{border:1px solid var(--line);border-radius:12px;margin:24px 0;padding:20px}._page_j1rh9_1 summary{cursor:pointer;font-weight:700}._worked_j1rh9_1 li{margin:12px 0}._note_j1rh9_1{background:var(--soft);border-inline-start:4px solid #db9c26;border-radius:0 10px 10px 0;margin:20px 0;padding:14px 20px;font-size:16px}._check_j1rh9_1{padding:10px 0}._lab_j1rh9_1{border:1px solid var(--line);background:var(--soft);border-radius:16px;margin:26px 0;padding:24px}._equation_j1rh9_1{align-items:center;gap:12px;margin:22px 0;display:flex}._equation_j1rh9_1>div{background:var(--surface);border:1px solid var(--line);text-align:center;border-radius:12px;flex:1;min-width:0;padding:16px}._equation_j1rh9_1 strong,._equation_j1rh9_1 small,._equation_j1rh9_1 span{display:block}._equation_j1rh9_1 strong{color:var(--purple);font-size:26px}._equation_j1rh9_1 small{font-size:12px;font-weight:750}._equation_j1rh9_1 span{font-size:12px}._inputLabel_j1rh9_1{flex-direction:column;gap:8px;font-size:16px;font-weight:650;display:flex}._page_j1rh9_1 select,._page_j1rh9_1 input[type=number]{font:inherit;border:1px solid var(--line);color:var(--ink);background:var(--surface);border-radius:8px;width:100%;max-width:100%;padding:12px}._toolbar_j1rh9_1 label{flex:1;min-width:190px;font-size:15px}._toolbar_j1rh9_1 select{margin-top:5px}._questionNav_j1rh9_1{flex-wrap:wrap;gap:7px;margin:18px 0;display:flex}._questionNav_j1rh9_1 button{min-width:44px;padding:7px;font-size:14px}._options_j1rh9_1{border:0;min-width:0;margin:22px 0;padding:0}._options_j1rh9_1 legend{width:100%;margin-bottom:16px;font-size:21px;font-weight:700;line-height:1.6}._options_j1rh9_1 label{border:1px solid var(--line);cursor:pointer;border-radius:12px;align-items:center;gap:12px;margin:10px 0;padding:16px;display:flex}._options_j1rh9_1 input{width:20px;height:20px;accent-color:var(--purple);flex-shrink:0}._options_j1rh9_1 b{margin-left:auto;font-size:12px}._options_j1rh9_1 label._correct_j1rh9_1{color:#3b2051;background:#f4eefc;border:2px solid #763db6}._options_j1rh9_1 label._incorrect_j1rh9_1{color:#702b2b;background:#fff1f1;border:2px solid #a54343}._feedback_j1rh9_1{border-inline-start:4px solid var(--purple);background:var(--soft);margin:20px 0;padding:20px}._source_j1rh9_1{border-top:1px solid var(--line);padding-top:18px;font-size:15px}._source_j1rh9_1 h2{font-size:20px}.night ._page_j1rh9_1{--ink:#f1eafa;--surface:#201a2b;--soft:#2d223d;--line:#59406e;--purple:#d5b4ff}.night ._page_j1rh9_1 ._primary_j1rh9_1,.night ._page_j1rh9_1 button[aria-pressed=true],.night ._page_j1rh9_1 button[aria-current=step]{color:#241436}.night ._options_j1rh9_1 label._correct_j1rh9_1{color:#eee0ff;background:#38204c}.night ._options_j1rh9_1 label._incorrect_j1rh9_1{color:#ffdede;background:#492529}@media (max-width:720px){._page_j1rh9_1{width:calc(100% - 24px);margin-top:20px;font-size:17px}._hero_j1rh9_1{padding:25px 20px}._hero_j1rh9_1 p{font-size:18px}._card_j1rh9_1{padding:22px 16px}._steps_j1rh9_1{grid-template-columns:repeat(2,minmax(0,1fr))}._grid_j1rh9_1{grid-template-columns:1fr}._lab_j1rh9_1{padding:18px 12px}._equation_j1rh9_1{gap:5px}._equation_j1rh9_1>div{padding:12px 5px}._equation_j1rh9_1 strong{font-size:20px}._equation_j1rh9_1 small{font-size:10px}._equation_j1rh9_1 span{font-size:11px}._options_j1rh9_1 label{flex-wrap:wrap}._options_j1rh9_1 span{flex:1}._options_j1rh9_1 b{width:100%;margin-left:32px}._actions_j1rh9_1 button,._actions_j1rh9_1 a{font-size:15px}._card_j1rh9_1 h2{font-size:27px}._hero_j1rh9_1 h1{letter-spacing:-.7px}}._tableWrap_j1rh9_2{margin:20px 0;overflow-x:auto}._ledger_j1rh9_2{border-collapse:collapse;width:100%;font-size:15px}._ledger_j1rh9_2 caption{text-align:left;margin-bottom:10px;font-weight:700}._ledger_j1rh9_2 th,._ledger_j1rh9_2 td{border:1px solid var(--line);text-align:right;padding:10px}._ledger_j1rh9_2 th:first-child{text-align:left}._ledger_j1rh9_2 thead,._ledger_j1rh9_2 tfoot{background:var(--soft)}._options_j1rh9_1 label._crossed_j1rh9_5 span{opacity:.55;text-decoration:line-through}._cross_j1rh9_5{border:1px solid var(--line);cursor:pointer;min-width:34px;min-height:34px;color:inherit;background:0 0;border-radius:8px;margin-left:auto;font-size:18px;line-height:1}._options_j1rh9_1 label._crossed_j1rh9_5 ._cross_j1rh9_5{background:var(--soft)}._flag_j1rh9_8{border:1px solid var(--line);cursor:pointer;color:inherit;background:0 0;border-radius:999px;margin-inline-start:10px;padding:4px 10px;font-size:13px}._flag_j1rh9_8[aria-pressed=true]{background:var(--soft);font-weight:700}