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(max-width:960px){.auth-page-v3{width:100%!important;min-height:100vh!important;min-height:100dvh!important;padding:24px!important;display:flex!important;align-items:center!important;justify-content:center!important;overflow:auto!important;background:#0a0a0a!important}.auth-shell-v3{width:min(620px,100%)!important;height:min(720px,calc(100dvh - 48px))!important;min-height:620px!important;max-height:720px!important;margin:auto!important;display:block!important;overflow:hidden!important;border-radius:30px!important;background:#fff!important;box-shadow:0 24px 70px 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32px 18px!important;overflow:visible!important;border:0!important;border-radius:0!important;background:#fff!important;box-shadow:none!important;flex:0 0 auto!important}.auth-form-heading-v3{margin:0 0 22px!important;text-align:center!important}.auth-fields-v3{gap:13px!important}.auth-card-v3 input{min-height:46px!important}.auth-card-v3 .form-grid.two{grid-template-columns:minmax(0,1fr) minmax(0,1fr)!important;gap:12px!important}.auth-submit-v3{min-height:48px!important;margin-top:18px!important}.auth-switch-v3{margin-top:15px!important}.auth-panel-footer-v3{position:static!important;transform:none!important;width:auto!important;max-width:100%!important;margin:auto auto 18px!important;padding:12px 24px 0!important;flex:0 0 auto!important;text-align:center!important;color:#a19e97!important}}@media(min-width:641px)and (max-width:960px)and (max-height:700px){.auth-page-v3{align-items:flex-start!important;padding-top:12px!important;padding-bottom:12px!important}.auth-shell-v3{height:calc(100dvh - 24px)!important;min-height:560px!important;max-height:none!important}.auth-mobile-topbar{height:78px!important;min-height:78px!important;flex-basis:78px!important}.auth-card-v3{padding-top:22px!important;padding-bottom:14px!important}.auth-form-heading-v3{margin-bottom:16px!important}.auth-fields-v3{gap:10px!important}.auth-card-v3 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minmax(0,1fr)!important}.auth-panel-footer-v3{position:static!important;left:auto!important;bottom:auto!important;transform:none!important;width:auto!important;max-width:100%!important;margin:18px auto 0!important;padding:0!important;flex:0 0 auto!important;text-align:center!important}.auth-visual-v3{min-width:0!important;height:auto!important;align-self:stretch!important;margin:clamp(16px,2vw,26px) clamp(16px,2vw,26px) clamp(16px,2vw,26px) 0!important;border-radius:clamp(22px,2vw,28px)!important}}@media(min-width:900px)and (max-width:1080px){.auth-page-v3{padding:18px!important}.auth-shell-v3{width:100%!important;height:clamp(580px,72dvh,650px)!important;grid-template-columns:minmax(0,1.1fr) minmax(320px,.9fr)!important}.auth-panel-v3{padding:44px 34px 22px!important}.auth-visual-v3{margin:16px 16px 16px 0!important}.auth-notebook-object{width:190px!important;height:262px!important}.auth-visual-logo{top:25px!important;left:25px!important}.auth-visual-logo img{width:112px!important}.auth-form-heading-v3{margin-bottom:18px!important}.auth-fields-v3{gap:11px!important}.auth-card-v3 input{min-height:43px!important}.auth-submit-v3{min-height:45px!important;margin-top:14px!important}.auth-switch-v3{margin-top:12px!important}}@media(min-width:900px)and (max-height:700px){.auth-page-v3{align-items:flex-start!important;padding-top:10px!important;padding-bottom:10px!important}.auth-shell-v3{height:calc(100dvh - 20px)!important;min-height:540px!important;max-height:none!important}.auth-panel-v3{padding-top:30px!important;padding-bottom:16px!important;overflow-y:auto!important}.auth-card-v3{margin:auto!important}.auth-panel-footer-v3{margin-top:10px!important}}@media(min-width:641px)and (max-width:899px){.auth-page-v3{width:100%!important;min-width:0!important;min-height:100vh!important;min-height:100dvh!important;padding:clamp(18px,4vw,32px)!important;display:flex!important;align-items:center!important;justify-content:center!important;overflow:auto!important;background:#0a0a0a!important}.auth-shell-v3{width:min(610px,100%)!important;height:clamp(610px,68dvh,660px)!important;min-height:0!important;max-height:660px!important;margin:auto!important;display:block!important;overflow:hidden!important;border-radius:28px!important;background:#fff!important;box-shadow:0 24px 70px #00000038!important}.auth-visual-v3,.auth-panel-language-v3{display:none!important}.auth-panel-v3{width:100%!important;height:100%!important;min-height:0!important;padding:0!important;display:flex!important;flex-direction:column!important;align-items:stretch!important;justify-content:flex-start!important;overflow:hidden!important;background:#fff!important}.auth-mobile-topbar{width:100%!important;height:86px!important;min-height:86px!important;padding:0 28px!important;display:flex!important;flex:0 0 86px!important;align-items:center!important;justify-content:space-between!important;background:#0a0a0a!important}.auth-mobile-topbar img{width:126px!important;height:auto!important}.auth-mobile-topbar .language-switcher{min-height:38px!important;background:#171717!important;border-color:#333!important;color:#fff!important}.auth-mobile-topbar .language-switcher select{color:#fff!important}.auth-card-v3{width:min(100%,500px)!important;min-width:0!important;height:auto!important;min-height:0!important;margin:0 auto!important;padding:24px 32px 14px!important;overflow-y:auto!important;border:0!important;border-radius:0!important;background:#fff!important;box-shadow:none!important;flex:1 1 auto!important;justify-content:center!important}.auth-card-v3.is-register{justify-content:center!important}.auth-form-heading-v3{margin:0 0 18px!important;text-align:center!important}.auth-fields-v3{gap:11px!important}.auth-card-v3 input{min-height:44px!important}.auth-card-v3 .form-grid.two{grid-template-columns:minmax(0,1fr) minmax(0,1fr)!important;gap:10px!important}.auth-submit-v3{min-height:46px!important;margin-top:15px!important}.auth-switch-v3{margin-top:13px!important}.auth-panel-footer-v3{position:static!important;transform:none!important;width:auto!important;max-width:100%!important;margin:0 auto!important;padding:8px 24px 14px!important;flex:0 0 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(max-width:1080px){.auth-shell-v3{width:min(100%,calc(100vw - 30px))!important;height:clamp(580px,72dvh,630px)!important;grid-template-columns:minmax(0,1.08fr) minmax(315px,.92fr)!important}.auth-panel-v3{padding:48px 32px 30px!important}.auth-card-v3{width:min(100%,420px)!important}.auth-panel-language-v3{top:20px!important;right:20px!important}.auth-visual-v3{margin:16px 16px 16px 0!important}.auth-visual-logo{top:24px!important;left:24px!important}.auth-visual-logo img{width:104px!important}.auth-notebook-object{width:190px!important;height:260px!important}}@media(min-width:641px)and (max-width:899px){.auth-shell-v3{width:min(590px,100%)!important}.auth-card-v3{width:min(100%,460px)!important;padding-left:28px!important;padding-right:28px!important}.auth-form-heading-v3{margin-bottom:18px!important}.auth-submit-v3{margin-top:16px!important}}@media(max-width:640px){.auth-form-heading-v3 h2{font-size:1.42rem!important}.auth-form-heading-v3 p{font-size:.75rem!important}.auth-card-v3 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select{color:#fff!important;font-size:.7rem!important;font-weight:650!important}.auth-card-v3{flex:1 1 auto!important;width:100%!important;height:auto!important;min-height:0!important;max-height:none!important;margin:0!important;padding:30px clamp(34px,8vw,62px) 28px!important;display:flex!important;flex-direction:column!important;align-items:stretch!important;justify-content:center!important;overflow-y:auto!important;overflow-x:hidden!important;scrollbar-width:none!important;border:0!important;border-radius:0 0 27px 27px!important;background:#fff!important;box-shadow:none!important}.auth-card-v3::-webkit-scrollbar{display:none!important}.auth-card-v3.is-register{justify-content:center!important}.auth-form-heading-v3{width:100%!important;margin:0 0 18px!important;text-align:center!important}.auth-form-heading-v3 h2{font-size:1.46rem!important}.auth-form-heading-v3 p{margin:7px auto 0!important;font-size:.74rem!important}.auth-fields-v3{gap:10px!important}.auth-card-v3 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16px)!important;min-height:0!important;max-height:720px!important;margin:auto!important;display:block!important;overflow:hidden!important;border:0!important;border-radius:0!important;background:#0a0a0a!important;box-shadow:none!important}.auth-visual-v3,.auth-panel-language-v3{display:none!important}.auth-panel-v3{width:100%!important;height:100%!important;min-height:0!important;padding:0!important;display:flex!important;flex-direction:column!important;align-items:stretch!important;justify-content:flex-start!important;overflow:hidden!important;background:#0a0a0a!important}.auth-mobile-topbar{display:flex!important;flex:0 0 84px!important;width:100%!important;height:84px!important;min-height:84px!important;padding:0 18px!important;align-items:center!important;justify-content:space-between!important;background:#0a0a0a!important}.auth-mobile-topbar img{width:124px!important;height:auto!important}.auth-mobile-topbar .language-switcher{min-height:38px!important;padding-inline:8px!important;border:1px solid #2B2B2B!important;border-radius:12px!important;background:#141414!important;box-shadow:none!important}.auth-mobile-topbar .language-switcher select{color:#fff!important;font-size:.7rem!important;font-weight:650!important}.auth-card-v3,.auth-card-v3.is-login,.auth-card-v3.is-register{flex:1 1 auto!important;width:calc(100% - 8px)!important;height:auto!important;min-height:0!important;max-height:none!important;margin:0 4px 4px!important;padding:26px clamp(20px,6vw,28px) 24px!important;display:flex!important;flex-direction:column!important;align-items:stretch!important;justify-content:center!important;overflow-y:auto!important;overflow-x:hidden!important;scrollbar-width:none!important;border:0!important;border-radius:26px!important;background:#fff!important;box-shadow:none!important}.auth-card-v3::-webkit-scrollbar{display:none!important}.auth-form-heading-v3{width:100%!important;margin:0 0 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img{width:112px!important}.auth-card-v3,.auth-card-v3.is-register{justify-content:flex-start!important;padding-top:20px!important;padding-bottom:18px!important}.auth-card-v3.is-login{justify-content:center!important}.auth-form-heading-v3{margin-bottom:14px!important}.auth-fields-v3{gap:7px!important}.auth-card-v3 input{min-height:40px!important}.auth-submit-v3{min-height:42px!important;margin-top:10px!important}.auth-switch-v3{margin-top:9px!important}}.auth-page-v3,.auth-shell-v3,.auth-panel-v3,.auth-mobile-topbar,.auth-visual-v3{direction:ltr!important}.auth-card-v3[dir=rtl]{direction:rtl!important;font-family:Segoe UI,Tahoma,Arial,sans-serif!important}.auth-card-v3[dir=rtl] .auth-form-heading-v3 h2,.auth-card-v3[dir=rtl] .auth-form-heading-v3 p,.auth-card-v3[dir=rtl] label,.auth-card-v3[dir=rtl] .password-hint,.auth-card-v3[dir=rtl] .auth-switch-v3,.auth-card-v3[dir=rtl] button{letter-spacing:0!important}.auth-card-v3[dir=rtl] label,.auth-card-v3[dir=rtl] .password-hint{text-align:right!important}.auth-card-v3[dir=rtl] input[dir=auto]{text-align:start!important;unicode-bidi:plaintext}.auth-card-v3[dir=rtl] input[dir=ltr]{text-align:left!important}.auth-card-v3[dir=rtl] .password-field input[dir=ltr]{padding-left:48px!important;padding-right:13px!important}.auth-card-v3[dir=rtl] .password-field button{left:7px!important;right:auto!important}.auth-card-v3[dir=rtl] .auth-switch-v3 button:after{content:" ←"!important;transform:translate(3px)}.auth-card-v3[dir=rtl] .auth-switch-v3 button:hover:after{transform:translate(0)}@media(min-width:641px){.auth-card-v3[dir=rtl] .auth-form-heading-v3{text-align:center!important}.auth-card-v3[dir=rtl] .auth-form-heading-v3 p{margin-left:auto!important;margin-right:auto!important;text-align:center!important}}@media(max-width:640px){.auth-card-v3[dir=rtl] .auth-form-heading-v3{text-align:right!important}.auth-card-v3[dir=rtl] .auth-form-heading-v3 p{margin-left:0!important;margin-right:0!important;text-align:right!important}.auth-mobile-topbar .language-switcher{direction:rtl!important}}@media(min-width:901px){.sidebar{width:232px;padding-inline:15px}.main-content{margin-left:232px}html[dir=rtl] .main-content{margin-left:0;margin-right:232px}.sidebar-collapsed .main-content{margin-left:82px}html[dir=rtl] .sidebar-collapsed .main-content{margin-left:0;margin-right:82px}}.sidebar-top{margin-bottom:24px}.sidebar-nav{gap:4px}.nav-link{min-height:44px;border-radius:12px;font-size:.86rem}.sidebar-user-card{min-height:48px;margin-bottom:8px;padding:6px 8px;background:transparent;border:1px solid transparent;border-radius:12px}.sidebar-user-card:hover{background:#f5f4f0;border-color:var(--keytak-line)}.sidebar-user-copy{flex:1;min-width:0;text-align:start}.sidebar-user-copy strong{font-size:.75rem;font-weight:760}.sidebar-user-arrow{display:grid;place-items:center;color:#a09e97;flex:0 0 auto}.logout-link{margin-top:1px}.app-topbar.home-topbar{justify-content:flex-end;height:64px;padding-inline:30px}.app-topbar.home-topbar .topbar-actions{margin-inline-start:auto}.dashboard-page.dashboard-simple{max-width:1220px;padding-top:26px;padding-bottom:72px}.dashboard-page .home-hero{min-height:156px;padding:27px 30px;border-radius:24px;align-items:flex-end}.dashboard-page .home-hero-label{margin-bottom:9px;font-size:.55rem;letter-spacing:.22em;color:#989898}.dashboard-page .home-hero h1{font-size:clamp(2.45rem,4.6vw,3.75rem);line-height:.9;letter-spacing:-.062em;font-weight:820}.dashboard-page .home-hero-mark{right:17%;top:-102px;width:235px;height:280px;opacity:.045}.dashboard-page .hero-button{min-height:43px;padding-inline:17px;border-radius:12px;font-size:.76rem;font-weight:790}.dashboard-page .home-library-heading{margin:25px 0 14px;align-items:center}.home-library-title{display:flex;align-items:center;gap:9px}.dashboard-page .home-library-heading h2{font-size:1.48rem;font-weight:820;letter-spacing:-.04em}.home-library-count{min-width:24px;height:24px;padding-inline:7px;border-radius:999px;display:inline-flex;align-items:center;justify-content:center;background:#e9e8e3;color:#66645e;font-size:.65rem;font-weight:780}.dashboard-page .home-notebook-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:22px 18px;align-items:start}.dashboard-page .home-notebook-grid .notebook-book-visual{aspect-ratio:.8;border-radius:18px 11px 13px 18px;box-shadow:6px 9px #e4e1d9,0 12px 26px #0a0a0a1a}.dashboard-page .home-notebook-grid .notebook-book-card:hover .notebook-book-visual{transform:translateY(-3px);box-shadow:7px 11px #e0ddd5,0 17px 32px #0a0a0a21}.dashboard-page .home-notebook-grid .notebook-book-label{left:19px;right:29px;top:22px;min-height:68px;padding:13px 14px 11px;border-radius:9px;gap:3px}.dashboard-page .home-notebook-grid .notebook-book-label 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var(--keytak-mobile-gutter) calc(104px + env(safe-area-inset-bottom,0px))!important;overflow-x:clip!important}.notebooks-welcome{width:100%!important;min-height:132px!important;margin:0!important;padding:18px 17px!important;border-radius:20px!important;box-sizing:border-box!important;overflow:hidden!important}.notebooks-welcome-copy{max-width:66%!important;min-width:0!important}.notebooks-welcome-copy h1:after{font-size:clamp(1.65rem,8vw,2.05rem)!important}.notebooks-welcome-book{width:82px!important;height:74px!important;right:10px!important;top:20px!important}.library-section-v2{width:100%!important;min-width:0!important;margin-top:22px!important}.library-section-heading-v2{width:100%!important;display:grid!important;grid-template-columns:minmax(0,1fr) auto!important;align-items:center!important;gap:10px!important}.library-section-heading-v2>div{min-width:0!important}.library-section-heading-v2 .section-kicker{display:none!important}.library-section-heading-v2 h2{font-size:clamp(1.42rem,7vw,1.75rem)!important;white-space:normal!important}.library-new-button{max-width:48vw!important;min-height:42px!important;padding-inline:13px!important;border-radius:999px!important;white-space:nowrap!important;font-size:.7rem!important}.library-controls-v2{display:block!important;width:100%!important;min-width:0!important}.library-search-v2{width:100%!important;height:46px!important;box-sizing:border-box!important}.library-search-v2 input{min-width:0!important;width:100%!important}.library-count-v2{display:none!important}.filter-chips-v2{max-width:100vw!important;box-sizing:border-box!important}.notebook-grid.library-grid-v2,.notebooks-skeleton-v2{width:100%!important;min-width:0!important;grid-template-columns:repeat(2,minmax(0,1fr))!important;gap:18px 12px!important;align-items:start!important}.notebook-card.notebook-book-card{width:100%!important;min-width:0!important;max-width:100%!important;margin:0!important;padding:0!important;overflow:visible!important}.notebook-card.notebook-book-card .notebook-book-visual{width:100%!important;max-width:100%!important;min-width:0!important;aspect-ratio:.78!important;height:auto!important;min-height:0!important;box-sizing:border-box!important}.notebook-book-label{left:11px!important;right:20px!important;top:13px!important;min-height:54px!important;padding:9px!important}.notebook-book-label strong{font-size:clamp(.66rem,3.3vw,.78rem)!important;overflow:hidden!important;text-overflow:ellipsis!important;white-space:nowrap!important}.notebook-book-label small{font-size:.53rem!important;overflow:hidden!important;text-overflow:ellipsis!important;white-space:nowrap!important}.notebook-book-mark{font-size:clamp(1.7rem,10vw,2.25rem)!important}.notebook-book-footer{left:11px!important;right:20px!important;bottom:11px!important;min-width:0!important}.notebook-book-count{font-size:.5rem!important;white-space:nowrap!important;overflow:hidden!important;text-overflow:ellipsis!important}.notebook-book-count em,.notebook-book-level{display:none!important}.notebook-book-brand{font-size:.48rem!important}.notebook-detail-page.notebook-detail-v36{width:100%!important;max-width:100%!important;padding:10px var(--keytak-mobile-gutter) calc(108px + env(safe-area-inset-bottom,0px))!important;overflow-x:clip!important}.notebook-detail-v36 .notebook-workspace-hero-v36{width:100%!important;max-width:100%!important;box-sizing:border-box!important;overflow:visible!important}.notebook-detail-v36 .notebook-hero-heading-v36 h1{font-size:clamp(1.18rem,6.6vw,1.48rem)!important;line-height:1.02!important;overflow-wrap:anywhere!important}.notebook-detail-v36 .notebook-study-options-v36{width:100%!important;grid-template-columns:repeat(2,minmax(0,1fr))!important}.notebook-detail-v36 .notebook-study-option-v36{min-width:0!important;overflow:hidden!important}.notebook-detail-v36 .notebook-study-option-copy-v36{min-width:0!important}.notebook-detail-v36 .notebook-study-option-copy-v36 strong{white-space:nowrap!important;overflow:hidden!important;text-overflow:ellipsis!important}.notebook-detail-v36 .notebook-lessons-shell-v36{width:100%!important;max-width:100%!important;overflow:hidden!important}.notebook-detail-v36 .lesson-shell-header-v36{position:relative!important;display:grid!important;grid-template-columns:minmax(0,1fr) auto!important;align-items:center!important;gap:8px!important;padding:10px!important;overflow:visible!important}.notebook-detail-v36 .lesson-shell-title-v36{min-width:0!important}.notebook-detail-v36 .lesson-shell-progress-v38{max-width:100%!important;min-width:0!important}.notebook-detail-v36 .lesson-shell-actions-v36{width:auto!important;min-width:0!important;margin:0!important;justify-self:end!important}.notebook-detail-v36 .lesson-new-button-v36{max-width:44vw!important;min-width:0!important;min-height:38px!important;padding:0 10px!important;overflow:hidden!important;text-overflow:ellipsis!important;white-space:nowrap!important}.notebook-detail-v36 .lesson-index-search-v36.open{left:8px!important;right:8px!important;top:62px!important}.notebook-detail-v36 .lesson-spread-v36,.notebook-detail-v36 .lesson-reader-stage-v36,.notebook-detail-v36 .lesson-page-desk-v36{width:100%!important;max-width:100%!important;min-width:0!important}.notebook-detail-v36 .lesson-reader-stage-v36{padding:10px!important}.notebook-detail-v36 .lesson-reader-sheet-v36{width:100%!important;max-width:100%!important;min-width:0!important;overflow:hidden!important;box-sizing:border-box!important}.notebook-detail-v36 .lesson-reader-topline-v36{display:flex!important;flex-wrap:wrap!important;align-items:center!important;gap:6px 10px!important}.notebook-detail-v36 .lesson-reader-meta-v36{margin-inline-start:auto!important;display:flex!important;flex-wrap:wrap!important;justify-content:flex-end!important}.notebook-detail-v36 .lesson-reader-body-v36 h3{width:100%!important;max-width:100%!important;white-space:normal!important;overflow:visible!important;text-overflow:clip!important;overflow-wrap:anywhere!important;font-size:clamp(1.22rem,6.4vw,1.48rem)!important;line-height:1.06!important}.notebook-detail-v36 .lesson-reader-summary-v36{overflow-wrap:anywhere!important}.notebook-detail-v36 .lesson-reader-footer-v36{width:100%!important}.notebook-detail-v36 .lesson-open-button-v36{width:100%!important;max-width:100%!important}.modal-backdrop{padding:0!important;align-items:stretch!important;justify-content:stretch!important}.modal-card,.modal-card.wide,.modal-card:has(.lesson-create-v20),.modal-card:has(.kt-nbedit-v05-root){width:100vw!important;max-width:100vw!important;height:100dvh!important;max-height:100dvh!important;margin:0!important;border-radius:0!important;border-inline:0!important;display:flex!important;flex-direction:column!important;overflow:hidden!important;box-sizing:border-box!important}.modal-card .modal-handle{display:none!important}.modal-card .modal-header,.modal-card:has(.lesson-create-v20) .modal-header,.modal-card:has(.kt-nbedit-v05-root) .modal-header{position:relative!important;z-index:20!important;flex:0 0 auto!important;width:100%!important;min-height:64px!important;height:64px!important;padding:0 18px!important;background:#fff!important;border-bottom:1px solid 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.lesson-create-intro-v20{grid-template-columns:42px minmax(0,1fr)!important;gap:10px!important;padding:11px!important}.lesson-create-v20 .lesson-create-context-v20{grid-column:1/-1!important;width:100%!important;min-width:0!important;padding:9px 0 0!important;border-inline-start:0!important;border-top:1px solid #E4DED4!important}.lesson-create-v20 .lesson-create-step-v20{grid-template-columns:32px minmax(0,1fr)!important;gap:10px!important}.lesson-create-v20 .form-step-number{width:32px!important;height:32px!important}.lesson-create-v20 .lesson-create-fields-v20{grid-template-columns:1fr!important;gap:14px!important}.lesson-create-v20 input,.lesson-create-v20 select{width:100%!important;min-height:48px!important;box-sizing:border-box!important}.lesson-create-v20 .lesson-language-choice-v23{width:100%!important;display:grid!important;grid-template-columns:repeat(4,minmax(0,1fr))!important;gap:4px!important}.lesson-create-v20 .lesson-language-choice-v23 button{min-width:0!important;min-height:42px!important;padding:0 6px!important}.lesson-create-v26.has-files .dropzone-v25,.lesson-create-v20 .dropzone{width:100%!important;box-sizing:border-box!important}.lesson-create-v20 .dropzone:not(.has-files){min-height:270px!important;padding:22px 16px!important}.lesson-create-v20 .dropzone-actions{width:100%!important;display:grid!important;grid-template-columns:1fr!important;gap:10px!important}.lesson-create-v20 .dropzone-actions .button{width:100%!important;min-width:0!important;min-height:48px!important}.lesson-create-v26.has-files .dropzone-v25{min-height:146px!important;padding:14px!important;grid-template-columns:42px minmax(0,1fr)!important;grid-template-rows:auto auto auto!important}.lesson-create-v26.has-files .dropzone-v25 .dropzone-actions{grid-column:1/-1!important;grid-row:3!important;width:100%!important;display:grid!important;grid-template-columns:1fr 1fr!important}.lesson-create-v26.has-files .dropzone-v25 .dropzone-actions 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.lesson-create-footer-buttons-v21{display:flex!important;gap:8px!important}.lesson-create-v20 .lesson-create-actions-v20 .button{min-height:44px!important}.kt-nbedit-v05-root{width:100%!important;min-width:0!important;min-height:100%!important}.kt-nbedit-v05-layout{display:flex!important;flex-direction:column!important;gap:0!important;padding:0!important}.kt-nbedit-v05-preview{order:-1!important;min-height:0!important;width:100%!important;padding:16px!important;display:grid!important;grid-template-columns:128px minmax(0,1fr)!important;grid-template-rows:auto auto!important;column-gap:18px!important;row-gap:5px!important;align-items:center!important;border-left:0!important;border-bottom:1px solid #ECE8E0!important;box-sizing:border-box!important;background:#fbfaf7!important}.kt-nbedit-v05-preview-head{grid-column:2!important;grid-row:1!important;width:100%!important;margin:0!important;padding:0!important;display:block!important}.kt-nbedit-v05-preview-head small{display:none!important}.kt-nbedit-v05-stage{grid-column:1!important;grid-row:1/3!important;width:128px!important;min-height:176px!important;height:176px!important;border-radius:16px!important}.kt-nbedit-v05-book{width:104px!important;max-width:104px!important;border-radius:13px 8px 9px 13px!important}.kt-nbedit-v05-preview>p{grid-column:2!important;grid-row:2!important;margin:0!important;text-align:start!important;font-size:.67rem!important;line-height:1.55!important;color:#8a847a!important}.kt-nbedit-v05-fields{padding:16px!important}.kt-nbedit-v05-section+.kt-nbedit-v05-section{margin-top:20px!important;padding-top:20px!important}.kt-nbedit-v05-section-head{gap:10px!important;margin-bottom:14px!important}.kt-nbedit-v05-form-grid,.kt-nbedit-v05-custom-stack{padding-left:0!important;padding-right:0!important}html[dir=rtl] .kt-nbedit-v05-form-grid,html[dir=rtl] .kt-nbedit-v05-custom-stack{padding-right:0!important}.kt-nbedit-v05-form-grid{grid-template-columns:1fr!important;gap:14px!important}.kt-nbedit-v05-field-name{grid-column:auto!important}.kt-nbedit-v05-field input{height:52px!important;min-height:52px!important;font-size:16px!important}.kt-nbedit-v05-tabs{width:100%!important;max-width:100%!important;overflow-x:auto!important;padding-bottom:5px!important}.kt-nbedit-v05-tabs button{min-height:30px!important;padding:0 10px!important;font-size:.6rem!important}.kt-nbedit-v05-visual-grid{grid-template-columns:repeat(6,minmax(0,1fr))!important;gap:8px!important;max-height:none!important;overflow:visible!important;padding:2px!important}.kt-nbedit-v05-visual{min-height:50px!important;aspect-ratio:1!important}.kt-nbedit-v05-colors-row{display:flex!important;flex-direction:row!important;flex-wrap:wrap!important;align-items:center!important;gap:8px!important}.kt-nbedit-v05-color-grid{width:max-content!important;max-width:100%!important;grid-template-columns:repeat(8,32px)!important;gap:5px!important}.kt-nbedit-v05-color{width:32px!important;height:32px!important;aspect-ratio:auto!important;min-width:32px!important;min-height:32px!important}.kt-nbedit-v05-custom-color{width:max-content!important;min-height:34px!important;padding:0 8px 0 5px!important;font-size:.57rem!important}.kt-nbedit-v05-actions{position:sticky!important;bottom:0!important;z-index:30!important;width:100%!important;box-sizing:border-box!important;padding:10px 16px calc(10px + env(safe-area-inset-bottom,0px))!important;background:#fffffffa!important}.kt-nbedit-v05-dirty{display:none!important}.kt-nbedit-v05-action-buttons{width:100%!important;display:grid!important;grid-template-columns:minmax(0,.9fr) minmax(0,1.4fr)!important;gap:10px!important}.kt-nbedit-v05-action-buttons .button{width:100%!important;min-width:0!important;min-height:48px!important;white-space:normal!important;text-align:center!important}}@media(max-width:460px){:root{--keytak-mobile-gutter:12px}.notebooks-welcome{min-height:124px!important;padding:16px!important}.notebooks-welcome-book{width:72px!important;height:66px!important;top:18px!important}.notebooks-welcome-copy{max-width:72%!important}.library-section-heading-v2{grid-template-columns:minmax(0,1fr) auto!important}.library-new-button{max-width:52vw!important;padding-inline:11px!important;font-size:.66rem!important}.notebook-grid.library-grid-v2,.notebooks-skeleton-v2{gap:16px 10px!important}.notebook-card.notebook-book-card .notebook-book-visual{aspect-ratio:.75!important}.notebook-book-label{left:10px!important;right:18px!important;top:11px!important;min-height:48px!important;padding:8px!important}.notebook-book-mark{font-size:1.75rem!important}.notebook-detail-v36 .notebook-study-option-v36{padding-inline-end:29px!important}.notebook-detail-v36 .lesson-shell-header-v36{grid-template-columns:minmax(0,1fr) auto!important}.notebook-detail-v36 .lesson-new-button-v36{max-width:48vw!important;font-size:.6rem!important;padding-inline:8px!important}.notebook-detail-v36 .lesson-reader-meta-v36{width:100%!important;margin-inline-start:0!important;justify-content:flex-start!important}.lesson-create-v26 .file-preview-grid-v26{grid-template-columns:1fr!important}.lesson-create-v26 .file-preview-v28 .file-preview-image-v25{height:210px!important}.lesson-create-v26 .file-preview-actions-v28{display:flex!important;flex-wrap:wrap!important}.lesson-create-v26 .file-preview-edit-v28,.lesson-create-v26 .file-preview-rotate-v28{flex-basis:100%!important}.lesson-create-v26 .file-preview-order-group-v28{margin:0!important}.lesson-create-v26 .file-preview-remove-v28{margin-inline-start:auto!important}.lesson-create-v20 .lesson-create-actions-v20{display:grid!important;grid-template-columns:1fr!important;gap:8px!important}.lesson-create-v20 .lesson-create-footer-status-v21{max-width:100%!important}.lesson-create-v20 .lesson-create-footer-buttons-v21{width:100%!important;display:grid!important;grid-template-columns:1fr 1fr!important}.kt-nbedit-v05-preview{grid-template-columns:108px 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.notebook-visual.is-emoji{width:auto!important;height:auto!important;font-size:1.3rem!important}}@media(max-width:900px){.mobile-menu-button.is-open{opacity:0!important;visibility:hidden!important;pointer-events:none!important;transform:scale(.92)!important}.sidebar.mobile-open .sidebar-top,.sidebar-collapsed .sidebar.mobile-open .sidebar-top{min-height:52px!important;height:52px!important;margin-bottom:18px!important;padding:0 2px!important;align-items:center!important}.sidebar.mobile-open .brand,.sidebar-collapsed .sidebar.mobile-open .brand{min-width:0!important;max-width:calc(100% - 58px)!important;height:46px!important;display:flex!important;align-items:center!important;overflow:hidden!important}.sidebar.mobile-open .brand-logo-full,.sidebar-collapsed .sidebar.mobile-open .brand-logo-full{width:min(154px,44vw)!important;max-width:100%!important;height:auto!important;object-fit:contain!important}.sidebar.mobile-open .sidebar-toggle.mobile-only{flex:0 0 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#e5e5e5;border-radius:15px;background:#fff;color:#111}.kt-free-wallet-v1-head{display:flex;align-items:center;gap:9px;min-width:0;font-size:.82rem}.kt-free-wallet-v1-head>strong{font-weight:750}.kt-free-wallet-v1-head>span{margin-inline-start:auto;font-weight:800;white-space:nowrap;font-variant-numeric:tabular-nums}.kt-free-wallet-v1-track{display:block;width:100%;height:6px;margin:12px 0 10px;border-radius:10px;background:#e8e8e8;overflow:hidden}.kt-free-wallet-v1-track>i{display:block;height:100%;background:#111;border-radius:inherit}.kt-free-wallet-v1>p{margin:5px 0 0;color:#666;line-height:1.5;font-size:.72rem}.kt-photo-only-notice-v1{display:flex;align-items:flex-start;gap:10px;margin:12px 0;padding:12px 14px;background:#f9f9f7;border:1px solid #deded9;color:#383838;border-radius:12px;font-size:.78rem;line-height:1.5}.kt-photo-only-notice-v1 svg{flex-shrink:0;margin-top:1px}.kt-photo-only-form-notice-v1{margin:7px 0 10px;padding:10px 12px;color:#4c4c4c;background:#f7f7f7;border:1px solid #dedede;border-radius:10px;font-size:.7rem;line-height:1.5}.kt-public{--public-ink:#141414;--public-line:#e4e4e4;--public-muted:#686868;background:#fff;color:var(--public-ink);min-height:100dvh;font-family:Inter,Arial,sans-serif;overflow-x:clip}.kt-public *{box-sizing:border-box}.kt-public a{color:inherit;text-decoration:none}.kt-public button{font:inherit;cursor:pointer;color:inherit}.kt-public :is(a,button,summary,[tabindex]):focus-visible{outline:2px solid #111;outline-offset:5px}.kt-public button:disabled{cursor:default}.kt-public :is(h1,h2,h3,p,figure){margin:0}.kt-public-header,.kt-public main,.kt-public-footer{width:min(1220px,calc(100% - 80px));margin-inline:auto}.kt-public-header{height:86px;position:relative;display:flex;align-items:center;justify-content:space-between;gap:28px;border-bottom:1px solid var(--public-line);z-index:20}.kt-public-brand img{display:block;width:126px;height:auto}.kt-public-nav,.kt-public-actions{display:flex;align-items:center;gap:28px}.kt-public-nav a{min-height:44px;display:flex;align-items:center;font-size:13px;font-weight:600;color:#666}.kt-public-nav a:hover,.kt-public-nav a[aria-current]{color:#111}.kt-public-actions{gap:18px}.kt-public-login{display:flex;align-items:center;gap:13px;min-height:44px;font-size:12px;font-weight:650}.kt-public-login svg{transition:transform .2s}.kt-public-login:hover svg{transform:translate(3px)}.kt-public-languages{display:flex;gap:2px;align-items:center}.kt-public-languages a{min-width:36px;min-height:44px;display:grid;place-items:center;font-size:10px;color:#686868;border-radius:8px}.kt-public-languages .is-active{color:#111;font-weight:750;background:#f1f1f1}.kt-public-menu{display:none;width:44px;height:44px;border:1px solid var(--public-line);background:#fff;border-radius:10px;place-items:center}.kt-public-menu-panel{position:absolute;inset-inline-end:0;top:76px;background:#fff;border:1px solid var(--public-line);padding:16px;border-radius:16px;width:min(320px,calc(100vw - 32px));box-shadow:0 15px 45px #0001}.kt-public-menu-panel nav{display:grid}.kt-public-menu-panel nav a{display:flex;align-items:center;justify-content:space-between;min-height:48px;font-size:14px}.kt-public-menu-panel .kt-public-languages{border-top:1px solid var(--public-line);padding-top:10px;margin-top:10px}.kt-public-hero{display:grid;grid-template-columns:1.5fr 1fr;align-items:center;gap:70px;padding:52px 0 40px}.kt-public-eyebrow{display:block;font-size:10px;font-weight:700;letter-spacing:.1em;color:#747474;line-height:1.5}.kt-public h1{font-size:clamp(42px,4.65vw,66px);line-height:1.04;letter-spacing:-.055em;font-weight:740;margin-top:15px;text-wrap:balance}.kt-public h1>span{display:block;font-family:Georgia,Times New 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.kt-public-eyebrow{font-size:9px;letter-spacing:.04em;text-transform:uppercase}.kt-example-heading h2{font-size:23px;font-weight:650;letter-spacing:-.04em;line-height:1.2;margin:7px 0}.kt-example-heading p{font-size:12px;color:var(--public-muted)}.kt-demo-replay{display:flex;align-items:center;justify-content:center;gap:9px;min-height:44px;border:1px solid #ddd;background:#fff;border-radius:9px;padding:0 13px;font-size:11px;white-space:nowrap}.kt-demo-replay:hover{background:#f6f6f6}.kt-demo-replay:disabled{opacity:.6}.kt-example-frame{display:grid;grid-template-columns:.65fr 1fr;gap:0;border:1px solid #dcdcdc;border-radius:22px;overflow:hidden;box-shadow:0 12px 35px #00000007;background:#f4f4f4}.kt-source-pane{display:grid;grid-template-rows:auto 1fr auto;padding:22px 26px;position:relative;border-inline-end:1px solid #ddd;min-width:0}.kt-source-pane figcaption{display:flex;align-items:center;gap:13px;margin-bottom:18px}.kt-demo-number{width:28px;height:28px;border:1px solid #d1d1d1;border-radius:50%;display:grid;place-items:center;flex-shrink:0;color:#686868;font-size:10px}.kt-source-pane figcaption strong{font-size:12px;font-weight:650;line-height:1.5}.kt-source-pane figcaption p{font-size:10px;color:#686868;margin-top:2px}.kt-source-photo{position:relative;display:block;padding:0;border:0;min-height:0;max-width:295px;width:100%;margin:auto;background:#e4e4e4;border-radius:5px;box-shadow:4px 8px 18px #0002;transform:rotate(-2deg);overflow:hidden;transition:transform .25s}.kt-source-photo:hover{transform:rotate(0)}.kt-source-photo>img{display:block;width:100%;height:345px;object-fit:contain}.kt-photo-enlarge{position:absolute;bottom:10px;inset-inline-end:10px;display:flex;align-items:center;gap:7px;min-height:32px;background:#fff;padding:0 11px;border-radius:7px;font-size:10px;box-shadow:0 2px 8px #0001}.kt-source-caption{display:flex;align-items:center;justify-content:center;gap:10px;margin-top:19px;font-size:10px;color:#747474;min-height:18px}.kt-source-caption svg{color:#111}.kt-scan-line{display:none;position:absolute;left:0;right:0;top:0;height:2px;background:#fff;box-shadow:0 0 16px 4px #fff8}.kt-example-frame.is-playing[data-phase="1"] .kt-scan-line{display:block;animation:kt-scan .9s linear both}.kt-result-pane{min-width:0;background:#fff}.kt-example-frame:not([data-phase="2"]) .kt-source-pane{min-height:500px;grid-template-rows:auto 1fr;padding-block:26px}.kt-example-frame:not([data-phase="2"]) .kt-source-photo{max-width:280px;margin:12px auto 0}.kt-example-frame:not([data-phase="2"]) .kt-source-photo>img{height:auto;aspect-ratio:693/923;object-fit:contain}.kt-example-frame:not([data-phase="2"]) .kt-source-caption{display:none}.kt-demo-invitation{display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;min-height:500px;height:100%;padding:45px 36px}.kt-demo-invitation .kt-public-eyebrow{font-size:10px;letter-spacing:.1em;color:#777}.kt-demo-invitation h3{font-family:Georgia,Times New Roman,serif;font-size:clamp(30px,3.2vw,43px);line-height:1.15;font-weight:400;letter-spacing:-.04em;text-wrap:balance;max-width:400px;margin:18px 0 15px}.kt-demo-invitation>p{font-size:13px;line-height:1.7;max-width:300px;color:#686868}.kt-public .kt-demo-launch{display:flex;align-items:center;justify-content:center;gap:14px;width:100%;max-width:360px;min-height:66px;margin-top:30px;padding:16px 21px;border:1px solid #111;border-radius:12px;background:#111;color:#fff;font-size:15px;font-weight:650;line-height:1.4;box-shadow:0 8px 24px #0002;animation:kt-demo-invite 2.8s ease-in-out 3;transition:transform .2s,background .2s,box-shadow .2s}.kt-demo-launch>svg{flex-shrink:0}.kt-demo-launch>span{flex:1}.kt-public .kt-demo-launch:hover{background:#292929;transform:translateY(-2px);animation:none;box-shadow:0 12px 26px #0003}.kt-public .kt-demo-launch:focus-visible{outline:2px solid #111;outline-offset:6px;animation:none}.kt-public .kt-demo-launch:disabled{cursor:wait;animation:none;background:#333;border-color:#333;transform:none}.kt-demo-launch:disabled>svg{animation:kt-demo-spin 1s linear infinite}.kt-demo-invitation>small{font-size:10px;line-height:1.6;color:#777;margin-top:18px}.kt-public[dir=rtl] .kt-demo-launch>svg:last-child{transform:scaleX(-1)}.kt-public[dir=rtl] .kt-demo-invitation h3{font-family:inherit;letter-spacing:0;line-height:1.4}@keyframes kt-demo-invite{0%,to{box-shadow:0 8px 24px #0002}50%{box-shadow:0 0 0 6px #0000000b,0 10px 26px #0003}}@keyframes kt-demo-spin{to{transform:rotate(360deg)}}.kt-workspace-heading{display:flex;align-items:center;gap:12px;padding:17px 25px;background:#111;color:#fff;min-height:71px}.kt-workspace-heading .kt-demo-number{border-color:#555;color:#bbb}.kt-workspace-heading>div{display:grid;gap:6px;min-width:0}.kt-workspace-heading>div>span{font-size:10px;line-height:1.3;color:#aaa}.kt-workspace-heading strong{font-size:12px;font-weight:650}.kt-workspace-heading>svg{margin-inline-start:auto;color:#bbb;flex-shrink:0}.kt-workspace-tabs{display:grid;grid-template-columns:repeat(3,1fr);border-bottom:1px solid var(--public-line);padding:0 18px;gap:12px}.kt-workspace-tabs button{min-height:45px;display:block;border:0;border-bottom:2px solid transparent;font-size:12px;font-weight:600;background:#fff;color:#686868;margin:0;white-space:nowrap}.kt-workspace-tabs [aria-selected=true]{border-bottom-color:#111;color:#111}.kt-workspace-tabs button:hover{color:#111}.kt-demo-panel{min-height:340px;padding:0;background:#fff}.kt-example-sheet{padding:21px 32px 24px;animation:kt-sheet-enter .25s ease both;position:relative;min-height:340px}.kt-sheet-kicker{font-size:9px;letter-spacing:.035em;color:#707070;line-height:1.4}.kt-example-sheet h3{font-family:Georgia,Times New Roman,serif;font-size:24px;line-height:1.2;letter-spacing:-.025em;font-weight:400;margin:7px 0 14px}.kt-example-sheet .darsi-math-content{font-size:15px;line-height:1.4;margin:8px 0;color:inherit;min-width:0;max-width:100%}.kt-example-sheet .darsi-math-display{max-width:100%;overflow-x:auto;margin:8px 0;padding:0;white-space:normal}.kt-example-sheet .darsi-math-inline{max-width:100%;font-size:inherit;color:inherit}.kt-example-sheet .katex{font-size:1.08em;color:inherit}.kt-example-sheet .katex-display{margin:0}.kt-demo-reader-loading{display:flex;align-items:center;justify-content:center;gap:12px;min-height:460px;color:#686868;font-size:13px}.kt-demo-reader-loading>svg{animation:kt-demo-spin 1s linear infinite}#kt-demo-result .kt-demo-notebook{display:block!important;width:100%;max-width:100%!important;margin:0!important;padding:0!important;min-height:0!important;height:auto!important;max-height:none!important}#kt-demo-result .kt-demo-notebook .lesson-book-stage{margin:0!important;border:0!important;border-radius:0!important;padding:20px!important;box-shadow:none!important;height:auto!important;max-height:none!important;background:#eeeae3!important}#kt-demo-result .kt-demo-notebook .lesson-book-spread{display:grid!important;width:100%!important;max-width:100%!important;height:auto!important;min-height:0!important;max-height:none!important;aspect-ratio:auto!important;grid-template-columns:repeat(2,minmax(0,1fr))!important;grid-template-rows:auto!important;gap:0!important;align-items:stretch!important}#kt-demo-result .kt-demo-notebook .lesson-book-spread:after{display:block!important;top:0!important;bottom:0!important;pointer-events:none}#kt-demo-result .kt-demo-notebook .lesson-book-page{display:flex!important;height:auto!important;max-height:none!important;min-width:0!important;align-self:stretch}#kt-demo-result .kt-demo-notebook .lesson-book-page .notebook-sheet{flex:1;width:100%!important;height:auto!important;min-height:600px!important;max-height:none!important;margin:0!important;grid-template-rows:40px 1fr 24px!important;outline:0!important}#kt-demo-result .kt-demo-notebook .lesson-book-page:first-child .notebook-sheet{border-radius:16px 2px 2px 16px!important;box-shadow:inset -9px 0 16px -12px #4f463e,0 7px 15px #00000008!important}#kt-demo-result .kt-demo-notebook .lesson-book-page:last-child .notebook-sheet{border-radius:2px 16px 16px 2px!important;box-shadow:inset 9px 0 16px -12px #4f463e,0 7px 15px #00000008!important}#kt-demo-result .kt-demo-notebook .sheet-red-margin{left:27px!important;right:auto!important}#kt-demo-result .kt-demo-notebook .sheet-header{padding-inline:43px 19px!important}#kt-demo-result .kt-demo-notebook .sheet-header 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