.cm2-book{max-width:860px;margin:auto;color:#24384b;line-height:1.85;font-size:1.06rem}.cm2-section{margin:0 0 22px;padding:23px 25px;background:#f6f9ff;border:1px solid #e0e9f4;border-radius:14px}.cm2-section:nth-child(even){background:#fff}.cm2-book .cm2-section h3{font-size:1.18rem;color:#163c68;margin:0 0 14px;padding-bottom:10px;border-bottom:2px solid #d9e6f6}.cm2-book p{margin:0 0 15px}.cm2-book p:last-child{margin-bottom:0}.cm2-book ul,.cm2-book ol{padding-left:25px;margin:12px 0}.cm2-book li{padding:5px 0}.cm2-warning{background:#fff9e9!important;border-color:#e5cf93}.cm2-warning blockquote{border-left:4px solid #bf880b;padding-left:16px;margin:0}.cm2-memory{background:#eff9f3!important;border-color:#badcc7}.cm2-correction{margin:8px 0;border:1px solid #bbd9c8;border-radius:10px;padding:12px 16px;background:#f1fbf5}.cm2-correction summary{cursor:pointer;font-weight:700;color:#165d36;list-style-position:inside}.cm2-correction[open] summary{margin-bottom:14px}.cm2-widget{padding:20px;border-radius:12px;border:1px solid #bdcfee;background:#edf3ff;min-width:0}.cm2-widget h4{font-size:1.1rem;margin:0 0 10px;color:#183e6f}.cm2-controls{display:flex;gap:12px;flex-wrap:wrap;align-items:end;margin:15px 0}.cm2-controls label{display:flex;flex-direction:column;gap:6px;font-size:.95rem;font-weight:600;max-width:100%}.cm2-controls input,.cm2-controls select{max-width:100%;width:200px;padding:8px;border:1px solid #738aae;border-radius:7px;background:white;font:inherit;color:#203449}.cm2-controls input[type=range]{padding:0;min-height:34px}.cm2-controls button,.cm2-timeline button{border:1px solid #6a86af;background:white;color:#173e73;border-radius:9px;padding:10px 14px;font:inherit;font-weight:600;cursor:pointer;min-height:44px;max-width:100%;white-space:normal}.cm2-controls button:hover,.cm2-timeline button:hover,.cm2-timeline button[aria-pressed=true]{background:#173e73;color:white}.cm2-widget button:focus-visible,.cm2-widget input:focus-visible,.cm2-widget select:focus-visible,.cm2-correction summary:focus-visible{outline:3px solid #b96700;outline-offset:3px}.cm2-output{padding:13px 16px;background:white;border-radius:8px;border-left:4px solid #2358a0;font-weight:600;overflow-wrap:anywhere}.cm2-fraction-picture{display:grid;gap:10px}.cm2-fraction-bar{display:grid;height:38px;border:2px solid #244b86;background:white;border-radius:4px;overflow:hidden}.cm2-fraction-bar span{border-right:1px solid #748bac}.cm2-fraction-bar span:last-child{border:0}.cm2-fraction-bar .filled{background:#5783d6}.cm2-area-picture{display:grid;max-width:100%;margin:12px auto;border:2px solid #244b86;background:#d4e7ff;gap:1px}.cm2-area-picture span{aspect-ratio:1;border:1px solid #749bc5}.cm2-robot-picture{display:grid;grid-template-columns:repeat(5,1fr);width:230px;max-width:100%;margin:15px auto;border:2px solid #274e85;gap:2px;background:white}.cm2-robot-picture span{aspect-ratio:1;background:#edf1f8;display:flex;align-items:center;justify-content:center;font-size:1.7rem}.cm2-robot-picture .trail{background:#c5d8f6}.cm2-robot-picture .robot{background:#2b5f9d;color:white;font-weight:700}.cm2-timeline{display:flex;gap:9px;flex-wrap:wrap;margin:14px 0}.cm2-notes button{min-width:58px}.cm2-lesson-label{display:block;font-size:.88rem;color:#485d73;font-weight:500;margin-top:7px}.cm2-intro{padding:18px 22px;background:#edf5ff;border-radius:12px;margin-bottom:22px;color:#28445f}.cm2-search{padding:22px;background:white;border:1px solid #d7e4f3;border-radius:14px;display:flex;gap:14px;flex-wrap:wrap;align-items:end}.cm2-search label{display:flex;flex-direction:column;gap:7px;font-weight:600;flex:1 1 240px}.cm2-search input,.cm2-search select{font:inherit;padding:10px;border:1px solid #7990aa;border-radius:7px;width:100%;min-width:0}.cm2-summary{display:flex;flex-wrap:wrap;gap:12px;margin:20px 0}.cm2-summary span{background:white;border:1px solid #d6e2ef;border-radius:20px;padding:8px 14px;font-size:.95rem}.cm2-subject summary{cursor:pointer;font-weight:700;font-size:1.12rem;list-style-position:inside;line-height:1.6}.cm2-subject summary:focus-visible{outline:3px solid #b96700;outline-offset:4px}.cm2-subject[open] summary{margin-bottom:12px}.cm2-subject li small{display:block;color:#465e76;font-size:.84rem}.cm2-start-hint{color:#486078;font-size:.95rem;margin-bottom:15px}.cm2-results-empty{padding:30px;background:white;border-radius:12px;text-align:center}.lesson-content>.cm2-book{padding:0}.cm2-practice-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,320px),1fr));gap:22px}.cm2-practice-grid>.cm2-widget{height:100%}
@media(max-width:600px){.cm2-book{font-size:1rem;line-height:1.8}.cm2-section{padding:16px 14px}.cm2-widget{padding:14px}.cm2-controls{gap:10px}.cm2-controls label{width:100%}.cm2-controls input,.cm2-controls select{width:100%}.lesson-content{padding:16px 12px}.cm2-search{padding:16px}.cm2-timeline button{font-size:.9rem}.cm2-grid{grid-template-columns:1fr}.cm2-summary{gap:8px}.cm2-summary span{font-size:.88rem;padding:7px 10px}}
.cm2-summary span{color:#173e73}
@media print{.cm2-book{font-size:10.5pt;line-height:1.5;max-width:none}.cm2-section{background:white!important;padding:10pt;border-color:#aaa;border-radius:0;break-inside:auto}.cm2-widget .cm2-controls,.cm2-timeline,.cm2-search{display:none!important}.cm2-widget{background:white;border-color:#aaa;break-inside:avoid}.cm2-correction{background:white}.cm2-correction>summary{display:none}.cm2-correction>*:not(summary){display:block!important}.cm2-subject>summary{display:block}.cm2-subject{break-inside:auto}.cm2-book h3{break-after:avoid}.cm2-summary span{background:white}}