.live-lesson{--lesson-green:#00875c;display:grid;grid-template-columns:215px minmax(0,1fr);max-width:1336px;margin:24px auto;border:1px solid #d5e7da;border-radius:25px;overflow:hidden;background:white;box-shadow:0 18px 65px #244c3910;color:#133b3b;min-height:0;height:auto;width:calc(100% - 48px);flex:1 1}.live-lesson button,.live-lesson summary{cursor:pointer}.live-lesson button:disabled{cursor:not-allowed;opacity:.5}.live-lesson button:focus-visible,.live-lesson input:focus-visible,.live-lesson summary:focus-visible{outline:3px solid #327bbe;outline-offset:3px}.live-lesson__sidebar{padding:30px 20px 20px;background:#fbfdfa;border-right:1px solid #e1ece7;display:flex;flex-direction:column;gap:20px;font-size:13px}.live-lesson__brand{display:flex;gap:10px;align-items:center;font-size:28px}.live-lesson__brand>span{background:#008960;color:#fff;border-radius:12px;width:37px;text-align:center}.live-lesson__caption{color:#7b9587;font-size:10px;letter-spacing:.12em;margin:10px 0 -8px}.live-lesson__sidebar nav{display:grid;grid-gap:6px;gap:6px}.live-lesson__sidebar nav button{border:0;background:none;text-align:left;padding:13px 12px;border-radius:10px;font-size:14px;color:#496568}.live-lesson__sidebar nav button.is-current{background:#e3f5e9;color:#087450;font-weight:700}.live-lesson__current{display:grid;grid-gap:9px;gap:9px;padding:5px 12px;border-left:2px solid #25a374;font-size:12px;overflow-wrap:anywhere}.live-lesson__current small{color:#869b8e;font-size:9px;letter-spacing:.08em}.live-lesson__pause{margin-top:auto;background:#f6f2e5;border:1px solid #ece5ce;padding:14px;border-radius:14px;font-size:12px;line-height:1.5;color:#776346}.live-lesson__pause p{margin:5px 0 0}.live-lesson .live-lesson__main{display:flex;flex-direction:column;min-width:0;min-height:0;height:100%;gap:0;padding:0;border:0;border-radius:0;box-shadow:none;background:white}.live-lesson .lesson-head{flex:none;display:flex;flex-direction:row;flex-wrap:nowrap;align-items:center;gap:14px;padding:18px 28px;border-bottom:1px solid #e1ece7;margin:0}.live-lesson__avatar{flex:none;width:44px;height:44px;overflow:hidden}.live-lesson__avatar .lumi{max-width:44px!important;max-height:44px!important}.live-lesson__avatar .lumi__glow{display:none}.live-lesson__title{min-width:0}.live-lesson .lesson-head h1{font-size:20px;margin:4px 0 0;line-height:1.3;overflow-wrap:anywhere}.live-lesson .eyebrow{font-size:10px;letter-spacing:.065em}.live-lesson .lesson-head__actions{margin-left:auto;flex:none;width:auto}.live-lesson .lesson-head .text-button{font-size:12px;min-height:42px;font-weight:500}.live-lesson__back{display:none}.live-lesson__menu{position:relative}.live-lesson__menu summary{list-style:none;border:1px solid #dce8e1;padding:6px 11px;border-radius:10px;font-size:22px}.live-lesson__menu summary::-webkit-details-marker{display:none}.live-lesson__menu>div{position:absolute;right:0;top:45px;z-index:20;background:white;border:1px solid #dce8e1;border-radius:12px;padding:7px;box-shadow:0 8px 28px #133b3b20;width:220px}.live-lesson__menu button{display:block;border:0;padding:12px;background:white;text-align:left;width:100%;color:#315747;font-size:13px}.live-lesson__scroll{flex:1 1;min-height:0;overflow:auto;overscroll-behavior:contain;padding:24px clamp(20px,4vw,60px);background:radial-gradient(ellipse at 95% 5%,#f1faf4,transparent 70%)}.live-lesson .stage-track{font-size:11px;font-weight:500;justify-content:center;margin:0 auto 22px;gap:3px}.live-lesson .messages{display:flex;flex-direction:column;gap:20px;overflow:visible;min-height:0;max-height:none;margin:0;padding:0}.live-message{min-width:0;display:flex;gap:11px;align-items:flex-start}.live-message--child{justify-content:flex-end}.live-message__reaction{width:44px;flex:none;margin-top:5px}.live-lesson .message{margin:0;min-width:0;max-width:100%;padding:19px 21px;font-size:17px;line-height:1.55;overflow-wrap:anywhere}.live-lesson .message--lumi{background:white;border:1px solid #e0e9e3;border-radius:4px 19px 19px 19px;flex:1 1}.live-lesson .message--child{color:#133b3b;background:#dff4e7;border:1px solid #d3eadc;border-radius:17px 17px 4px 17px;max-width:85%;padding:12px 18px;font-size:15px}.live-lesson .message p+p{margin-top:12px}.live-lesson__thinking{font-size:13px;color:#657d71;margin:0 0 0 55px}.live-lesson .quick-actions{margin:15px 0 15px 55px;gap:8px}.live-lesson .quick-actions button{font-size:12px;min-height:42px;padding:9px 12px;background:#fff;border-radius:11px;font-weight:500}.live-lesson__more summary{font-size:12px;padding:12px;color:#49735c}.live-lesson__more[open]{display:flex}.live-lesson .hint-label{margin:10px 0 15px 55px;background:#fff5da;border:1px solid #f1e2ae;border-radius:12px;padding:12px;font-size:13px;font-weight:400}.live-lesson .complaint-bar{justify-content:flex-end}.live-lesson .complaint-bar button{font-size:11px;font-weight:400;border:0;min-height:36px;background:none;color:#6f857a}.live-lesson .check-card{margin-left:55px}.live-lesson .profile-status{font-size:14px}.live-lesson .photo-warning{font-size:12px}.live-lesson__composer{padding:15px 28px 17px;border-top:1px solid #edf1ed;background:#fff;flex:none}.live-lesson .composer{display:flex;gap:9px;align-items:center;margin:0;border:1px solid #cee3d5;border-radius:16px;padding:7px;background:white}.live-lesson .composer>textarea{flex:1 1;width:0;min-width:0;padding:10px 4px;font-size:16px;line-height:24px;font-family:inherit;color:inherit;border:0;background:transparent;resize:none;min-height:44px;max-height:160px;border-radius:6px;overscroll-behavior:contain}.live-lesson .composer:focus-within{border-color:#00875c;box-shadow:0 0 0 2px #00875c20}.live-lesson .composer>textarea:focus{outline:none}.live-lesson .composer{align-items:flex-end}.live-lesson .composer-help{font-size:10px;color:#547468;margin:6px 0 0;text-align:center}.composer-help__mobile{display:none}@media(max-width:700px),(pointer:coarse){.composer-help__desktop{display:none}.composer-help__mobile{display:inline}}.live-lesson[data-keyboard-open=true]{display:flex;flex-direction:column;border:0;min-height:0}.live-lesson[data-keyboard-open=true] .live-lesson__sidebar{display:none}.live-lesson[data-keyboard-open=true] .live-lesson__main{flex:1 1;min-height:0;width:100%;border-radius:0}.live-lesson[data-keyboard-open=true] .live-lesson__composer{padding:6px 12px}.live-lesson[data-keyboard-open=true] .composer-help,.live-lesson[data-keyboard-open=true] .parent-visibility{display:none}.live-lesson[data-keyboard-open=true] .lesson-head{padding:6px 12px}.live-lesson .composer button{width:42px;height:42px;min-height:42px;border:0;border-radius:11px;padding:0;background:#eef6ef;flex:none}.live-lesson .composer button.send{background:var(--lesson-green);color:#fff}.live-lesson .parent-visibility{font-size:10px;margin:9px 0 0}.live-lesson .file-input{display:none}.lesson-content__label{display:block;color:#8a7351;font-size:10px;text-transform:uppercase;font-weight:700;letter-spacing:.08em;margin-bottom:9px}.lesson-definition{font-size:18px;line-height:1.55}.live-lesson .message .lesson-example-copy{font-size:13px;color:#6c827a;margin:8px 0 0}.lesson-example{background:#f0f8f1;border:1px solid #dfeddf;margin-top:18px;border-radius:14px;padding:15px}.lesson-example__head{display:flex;gap:8px;justify-content:space-between;align-items:center;font-size:12px;color:#457454}.lesson-example__head span{font-size:10px;color:#6b8672}.lesson-groups{display:flex;flex-wrap:wrap;justify-content:center;gap:18px;margin:15px 0 8px}.lesson-group{max-width:100%;text-align:center}.lesson-group small{font-size:11px;color:#648268}.lesson-cubes{display:flex;flex-wrap:wrap;justify-content:center;max-width:280px;gap:3px;border-bottom:1px solid #a6c8ab;border-radius:0 0 12px 12px;padding-bottom:8px}.lesson-cube{background:none!important;border:0!important;position:relative;width:44px;height:48px;min-height:44px!important;padding:0!important}.lesson-cube svg{width:44px;height:48px;stroke:#277a36;stroke-width:1.2}.lesson-cube span{position:absolute;inset:0;display:grid;place-items:center;padding-top:9px;font-size:15px;font-weight:700;color:#fff;text-shadow:0 1px 3px #195b2b}.lesson-cube[aria-pressed=true] svg{filter:brightness(.8)}.live-lesson .message .lesson-equation{text-align:center;font-size:21px;letter-spacing:.04em;color:#28643f;font-weight:700;margin:9px 0 0}.live-lesson .message .lesson-count{text-align:center;font-size:11px;color:#6c827a;margin:4px 0 0}.lesson-next{margin-top:18px;border-left:3px solid #e7b748;padding:2px 0 2px 13px}.lesson-next>span{color:#947019;text-transform:uppercase;letter-spacing:.08em;font-size:10px;font-weight:700}.live-lesson .message .lesson-next p{margin:5px 0 0;font-size:17px}@media(hover:hover) and (pointer:fine){.live-lesson .quick-actions button:hover,.live-lesson__menu button:hover,.live-lesson__sidebar nav button:hover{background:#edf6ef}.lesson-cube:hover{transform:translateY(-2px)}}.live-lesson button{transition:transform .12s cubic-bezier(.23,1,.32,1),background .12s ease}.live-lesson button:active:not(:disabled){transform:scale(.97)}@media(max-width:1000px){.live-lesson{grid-template-columns:180px 1fr;margin:12px;max-width:none}.live-lesson__sidebar{padding:23px 12px}.live-lesson .lesson-head{padding:15px 18px}.live-lesson__scroll{padding:20px}.live-lesson__composer{padding:12px 20px}.live-lesson .lesson-head h1{font-size:18px}.live-lesson .live-lesson__later{display:none}}@media(max-width:700px){.live-lesson{display:block;margin:0;min-height:0;height:auto;width:100%;border:0;border-radius:0}.live-lesson__sidebar{display:none}.live-lesson .live-lesson__main{height:100%}.live-lesson .lesson-head{padding:10px 12px;gap:7px}.live-lesson .lesson-head h1{font-size:16px}.live-lesson .eyebrow{font-size:9px}.live-lesson__avatar{width:36px;height:40px}.live-lesson__back{display:block;border:0;background:none;color:#447760;font-size:28px;width:24px;padding:0}.live-lesson__menu summary{padding:7px;border:0}.live-lesson__scroll{padding:14px 12px 20px}.live-lesson .stage-track{font-size:10px;margin-bottom:16px}.live-message{gap:6px}.live-message__reaction{width:32px;flex:none}.live-message__reaction .lumi-reaction{width:32px;height:36px;max-width:32px}.live-lesson .message{padding:14px 13px;font-size:16px}.live-lesson .message--child{font-size:14px;padding:10px 14px}.live-lesson .quick-actions{margin-left:38px}.live-lesson .quick-actions button{font-size:12px;min-height:44px}.live-lesson .check-card,.live-lesson .hint-label{margin-left:38px}.live-lesson__composer{padding:9px 12px max(10px,env(safe-area-inset-bottom))}.live-lesson .parent-visibility{font-size:9px}.lesson-definition{font-size:16px}.lesson-example{padding:10px 8px}.lesson-example__head{display:block;font-size:11px}.lesson-example__head span{display:block}.lesson-groups{gap:10px}.lesson-cubes{gap:0}.lesson-cube{width:44px}.live-lesson .message .lesson-equation{font-size:18px}.live-lesson .message .lesson-next p{font-size:15px}}@media(prefers-reduced-motion:reduce){.live-lesson button{transition:none!important}.lesson-cube:hover,.live-lesson button:active{transform:none!important}}.shell--child:has(.live-lesson){height:100dvh;min-height:0;display:flex;flex-direction:column}.shell--child:has(.live-lesson)>.lumi-preview-switch,.shell--child:has(.live-lesson)>.topbar{flex:none}.shell--child:has(.live-lesson) .child-experience{display:flex;flex:1 1;min-height:0}.lesson-diagram{margin:16px 0 0;padding:16px;border:1px solid #d4e9dc;background:#f0f8f1;border-radius:16px;max-width:100%;color:#244f40}.lesson-diagram figcaption{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;margin-bottom:14px;font-size:14px}.lesson-diagram figcaption span,.lesson-diagram small{font-size:12px;color:#577b6b}.lesson-diagram>svg{display:block;width:100%;max-width:280px;max-height:260px;margin:0 auto 12px}.diagram-number-line{display:flex;overflow-x:auto;padding:8px 0;margin-bottom:8px;border-bottom:2px solid #87b59a}.diagram-number-line button{flex:none;min-width:44px;min-height:44px;border:1px solid transparent;background:white;color:#28563f}.diagram-number-line .marked{border-color:#3f9d70}.diagram-number-line button[aria-pressed=true]{background:#215f49;color:white}.diagram-fraction{display:flex;gap:3px;height:60px;margin-bottom:10px;overflow-x:auto;padding:4px}.diagram-fraction button{flex:1 1;min-width:44px;border:2px solid #86b69b;background:white;border-radius:4px}.diagram-fraction button.filled{background:#67bb7c}.diagram-fraction button[aria-pressed=true]{outline:3px solid #335b9b;outline-offset:2px}.diagram-labels,.diagram-place,.diagram-word{display:flex;gap:8px;flex-wrap:wrap;justify-content:center}.diagram-labels span,.diagram-place>div,.diagram-word>div{border:1px solid #b6d4c1;border-radius:10px;padding:10px;background:white;text-align:center;min-width:44px;overflow-wrap:anywhere}.diagram-place strong,.diagram-word strong{display:block;font-size:22px}.diagram-place small,.diagram-word small{display:block}.diagram-word [data-part=корень]{border-bottom:3px solid #268a57}.diagram-word [data-part=приставка]{border-top:3px solid #268a57}.diagram-word [data-part=суффикс]{border-top:3px dashed #268a57}.diagram-word [data-part=окончание]{border:2px solid #268a57}.diagram-cards,.diagram-columns{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,145px),1fr));grid-gap:10px;gap:10px}.diagram-columns>div,.diagram-flip{background:white;border:1px solid #bddcc9;border-radius:12px;padding:14px;text-align:left;overflow-wrap:anywhere}.diagram-flip{min-height:88px;color:inherit}.diagram-flip span,.diagram-flip strong{display:block}.diagram-flip span{margin-top:8px;font-size:13px}.diagram-columns ul{padding-left:18px;font-size:14px;margin:10px 0 0}.diagram-sequence,.diagram-timeline{list-style:none;padding:0;margin:0}.diagram-sequence li{display:flex;align-items:center;gap:12px;padding:10px;border-bottom:1px solid #c5dfce;font-size:14px}.diagram-sequence li>span{display:grid;place-items:center;flex:none;width:30px;height:30px;background:#d2edd9;border-radius:50%}.diagram-timeline li{border-left:3px solid #86b69b;padding:8px 12px 16px;display:grid;grid-gap:5px;gap:5px;font-size:14px}.diagram-center{background:#d6eedb;padding:12px;text-align:center;border-radius:10px;margin-bottom:12px;font-weight:700}.diagram-balance{display:flex;align-items:center;justify-content:center;gap:10px;margin-bottom:12px}.diagram-balance>div{display:flex;flex-wrap:wrap;justify-content:center;gap:6px;flex:1 1;padding:10px 0;border-bottom:3px solid #719e86}.diagram-balance span{background:white;padding:8px;border-radius:6px;overflow-wrap:anywhere}.diagram-bars>div{display:grid;grid-template-columns:minmax(65px,1fr) 2fr;grid-gap:4px 10px;gap:4px 10px;margin:10px 0;align-items:center;font-size:13px}.diagram-bars small{grid-column:2}.diagram-bar-track{background:#d8eadd;border-radius:6px;height:22px}.diagram-bar-track>div{height:100%;background:#43a36b;border-radius:6px}.diagram-table-scroll{overflow:auto;max-width:100%}.lesson-diagram table{border-collapse:collapse;width:100%;font-size:13px}.lesson-diagram td,.lesson-diagram th{padding:10px;border:1px solid #bed7c7;text-align:left;overflow-wrap:anywhere}.lesson-diagram th{background:#deefe3}.diagram-table-scroll:focus-visible,.lesson-diagram button:focus-visible{outline:3px solid #386da6;outline-offset:2px}@media(max-width:600px){.lesson-diagram{padding:12px 10px}.diagram-place strong{font-size:18px}}.visual-gallery{max-width:1200px;padding:24px;margin:auto}.visual-gallery__grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,310px),1fr));grid-gap:20px;gap:20px;margin-top:20px}.visual-gallery__grid article{padding:18px;background:white;border:1px solid #d4e9dc;border-radius:16px;min-width:0}.visual-gallery h2{font-size:18px}