@font-face{font-family:ABC Gravity Cyrillic;src:url(/_next/static/media/ABCGravityExtraCondensedCyrillic-Ultra.c56f805d.woff2) format("woff2");font-weight:1000;font-style:normal;font-stretch:ultra-condensed;font-display:swap}@font-face{font-family:ABC Gravity Cyrillic;src:url(/_next/static/media/ABCGravityExpandedCyrillic-Ultra.30f1bc15.woff2) format("woff2");font-weight:1000;font-style:normal;font-stretch:ultra-expanded;font-display:swap}:root{--kit-black:#1f222f;--kit-black-60:rgba(31,34,47,.6);--kit-black-50:rgba(31,34,47,.5);--kit-black-20:rgba(31,34,47,.2);--kit-black-14:rgba(31,34,47,.14);--kit-black-12:rgba(31,34,47,.12);--kit-overlay:rgba(0,4,19,.8);--kit-gray:#edf2f8;--kit-gray-muted:#e4e4e6;--kit-gray-light:#f4f7fb;--kit-white:#fff;--kit-white-60:hsla(0,0%,100%,.6);--kit-white-50:hsla(0,0%,100%,.5);--kit-white-20:hsla(0,0%,100%,.2);--kit-accent:#ff3b00;--kit-accent-50:rgba(255,59,0,.5);--kit-accent-20:rgba(255,59,0,.2);--kit-biology:#5fa131;--kit-geography:#017c53;--kit-informatics:#00919e;--kit-foreign:#2989e2;--kit-math:#5040ff;--kit-physics:#5200be;--kit-chemistry:#b928e5;--kit-social:#ec3a87;--kit-russian:#e52b47;--kit-literature:#e65400;--kit-history:#eb7d15;--kit-task-correct:rgba(1,124,83,.05);--kit-task-error:rgba(227,39,42,.05);--kit-task-error-stroke:rgba(227,39,42,.15);--kit-task-incomplete:rgba(230,84,0,.05);--kit-task-partial:#e65400}html.is-landing-redesign:not(.is-landing-home) main:has(.course-cover),main.public-main--redesign:has(.course-cover){padding-top:0}.course-cover{--course-cover-gutter:1rem;--course-cover-bleed:calc(max(0px, (100vw - 120rem) / 2) + var(--course-cover-gutter));position:relative;width:100%;min-width:0;overflow:clip;color:var(--kit-white);background:var(--kit-white);font-family:var(--kit-font-text),sans-serif;font-weight:600;font-stretch:normal;font-size:1rem;line-height:1.4;letter-spacing:-.01em}.course-cover__container.container{width:100%;max-width:120rem;margin-inline:auto;padding-inline:var(--course-cover-gutter)}.course-cover__layout{position:relative;min-width:0}.course-cover .course-cover__breadcrumbs.kit-breadcrumbs{position:absolute;top:9.375rem;left:0;z-index:4;display:none;max-width:100%}.course-cover .course-cover__breadcrumbs.kit-breadcrumbs a,.course-cover .course-cover__breadcrumbs.kit-breadcrumbs span,.course-cover .course-cover__breadcrumbs.kit-breadcrumbs span.is-current{color:var(--kit-white);font-weight:400;font-size:clamp(.875rem,calc(.3125vw + 10px),1rem)}@media(min-width:1280px){.course-cover .course-cover__breadcrumbs.kit-breadcrumbs{display:block}}.course-cover h1,.course-cover h2,.course-cover p{margin:0}.course-cover a{color:inherit;text-decoration:none}.course-cover__media{position:relative;height:19.375rem;background:var(--kit-black)}.course-cover__image,.course-cover__player,.course-cover__player video{position:absolute;inset:0;width:100%;height:100%}.course-cover__image{-o-object-fit:cover;object-fit:cover}.course-cover__player{z-index:1}.course-cover__player video{-o-object-fit:cover;object-fit:cover}.course-cover__close{position:absolute;top:6rem;right:1.5rem;display:grid;place-items:center;width:3rem;height:3rem;padding:0;background:var(--kit-overlay);border:0;border-radius:.75rem;cursor:pointer;z-index:4}.course-cover__close:focus-visible{outline:2px solid var(--kit-white);outline-offset:4px}.course-cover__error{position:absolute;top:45%;right:1.5rem;left:1.5rem;padding:1rem;text-align:center;background:var(--kit-overlay);border-radius:.75rem}.course-cover__gradient{display:none}.course-cover__info{position:relative;z-index:2;margin-top:-4.1875rem;-webkit-transition:-webkit-transform .6s cubic-bezier(.35,0,.1,1);transition:-webkit-transform .6s cubic-bezier(.35,0,.1,1);transition:transform .6s cubic-bezier(.35,0,.1,1);transition:transform .6s cubic-bezier(.35,0,.1,1),-webkit-transform .6s cubic-bezier(.35,0,.1,1)}.course-cover__shape{position:absolute;inset:3.4375rem calc(-1*var(--course-cover-gutter)) 0;z-index:-1;background:var(--course-cover-color)}.course-cover__shape:before{position:absolute;top:-2.0625rem;left:-10%;width:120%;height:6.25rem;content:"";background:inherit;-webkit-transform:rotate(7deg);transform:rotate(7deg)}.course-cover__content{display:grid;grid-template-areas:"heading" "facts" "buy";grid-gap:2rem;gap:2rem;padding:0 0 3.125rem}.course-cover__heading{grid-area:heading}.course-cover__tags{display:-ms-flexbox;display:flex;-ms-flex-wrap:wrap;flex-wrap:wrap;-ms-flex-align:end;align-items:flex-end;min-height:5rem;margin-bottom:1.25rem}.course-cover__subject{display:-ms-inline-flexbox;display:inline-flex;-ms-flex-negative:0;flex-shrink:0;-ms-flex-align:end;align-items:flex-end;padding-bottom:.5rem}.course-cover__subject img{width:5rem;height:5rem;margin-right:-2.5rem;-o-object-fit:contain;object-fit:contain}.course-cover__subject .kit-tag{position:relative;z-index:1;height:2.25rem;margin:0 .625rem .125rem;padding:.625rem .75rem;border-radius:.75rem;-webkit-transform:rotate(-6deg);transform:rotate(-6deg)}.course-cover__meta{padding:.25rem 0;color:var(--kit-white-50)}.course-cover h1{font-family:"ABC Gravity Cyrillic","ABC Gravity Cyrillic Trial",var(--kit-font-text),sans-serif;font-weight:1000;font-stretch:ultra-condensed;letter-spacing:0;font-size:2.5rem;line-height:.9;text-transform:uppercase;overflow-wrap:break-word}.course-cover__teachers{display:-ms-flexbox;display:flex;-ms-flex-wrap:wrap;flex-wrap:wrap;gap:1rem 1.5rem;margin-top:1.5rem}.course-cover__teacher{display:-ms-inline-flexbox;display:inline-flex;gap:.75rem;-ms-flex-align:center;align-items:center}.course-cover__teacher-label{display:block;color:var(--kit-white-50)}.course-cover__teacher-name{display:-ms-flexbox;display:flex;gap:.25rem;-ms-flex-align:center;align-items:center}.course-cover__teacher-name img{-webkit-transform:rotate(-90deg);transform:rotate(-90deg)}.course-cover__teacher .kit-avatar__item img{width:116.66%;height:156.25%;margin-top:56.25%;-o-object-fit:cover;object-fit:cover}.course-cover__avatar-fallback{display:grid;-ms-flex:0 0 3rem;flex:0 0 3rem;place-items:center;height:3rem;color:var(--kit-black);background:var(--kit-gray);border-radius:50%}.course-cover__facts{grid-area:facts;gap:1rem}.course-cover__dates,.course-cover__facts{display:-ms-flexbox;display:flex;-ms-flex-direction:column;flex-direction:column}.course-cover__dates{gap:.5rem;-ms-flex-align:start;align-items:flex-start}.course-cover__fact{display:-ms-flexbox;display:flex;gap:.5rem;-ms-flex-align:center;align-items:center;min-height:2rem}.course-cover__fact-icon{display:grid;-ms-flex:0 0 2rem;flex:0 0 2rem;place-items:center;width:2rem;height:2rem}.course-cover__extra-facts{display:-ms-flexbox;display:flex;-ms-flex-direction:column;flex-direction:column;gap:.5rem}.course-cover__muted{color:var(--kit-white-50)}.course-cover__calendar{-webkit-transform:rotate(3deg);transform:rotate(3deg)}.course-cover__buy{grid-area:buy;gap:.625rem;min-width:0}.course-cover__buy,.course-cover__price{display:-ms-flexbox;display:flex;-ms-flex-direction:column;flex-direction:column}.course-cover__price{gap:.25rem}.course-cover__price>p{display:-ms-flexbox;display:flex;gap:.125rem;-ms-flex-align:baseline;align-items:baseline;-ms-flex-wrap:wrap;flex-wrap:wrap}.course-cover__price strong{font-size:2rem;font-weight:600;line-height:1.3}.course-cover__total{display:-ms-flexbox;display:flex;gap:.25rem;-ms-flex-align:center;align-items:center}.course-cover__actions{display:-ms-flexbox;display:flex;-ms-flex-direction:column;flex-direction:column;gap:.625rem}.course-cover__actions .kit-button,.course-cover__actions .kit-button__face,.course-cover__actions .kit-button__sizer{width:100%}.course-cover__actions .kit-button--transparent .kit-button__face{background:var(--kit-white-20)}.course-cover__lessons{position:relative;min-width:0;z-index:3;padding:0 0 1.5rem;color:var(--kit-black);isolation:isolate}.course-cover__lessons:before{position:absolute;inset:0 calc(-1*var(--course-cover-gutter));z-index:-1;content:"";background:linear-gradient(var(--course-cover-color) 0 90px,var(--kit-white) 90px)}.course-cover__lessons-heading{display:-ms-flexbox;display:flex;gap:.75rem;-ms-flex-align:center;align-items:center;-ms-flex-pack:justify;justify-content:space-between;margin-bottom:1rem}.course-cover__lessons-heading h2{font-family:"ABC Gravity Cyrillic","ABC Gravity Cyrillic Trial",var(--kit-font-text),sans-serif;font-weight:1000;font-stretch:ultra-condensed;letter-spacing:0;font-size:1.625rem;line-height:1;color:var(--kit-white);text-transform:uppercase}.course-cover__arrows{display:none}.course-cover__viewport{width:calc(100% + var(--course-cover-gutter));min-width:0;overflow:hidden;-ms-touch-action:pan-y pinch-zoom;touch-action:pan-y pinch-zoom}.course-cover__viewport:focus-visible{outline:2px solid currentColor;outline-offset:4px}.course-cover__track{display:-ms-flexbox;display:flex;gap:.9375rem;-ms-flex-align:start;align-items:flex-start}.course-cover__lesson{-ms-flex:0 0 14.3125rem;flex:0 0 14.3125rem;min-width:0}.course-cover__lesson p{margin-top:.5rem}.course-cover__lesson.is-selected .kit-video-small:after{border-color:var(--kit-accent)}.course-cover__lesson.is-selected .kit-video-small__photo{inset:.375rem;width:calc(100% - .75rem);height:calc(100% - .75rem);border-radius:.625rem}.course-cover__dots{display:-ms-flexbox;display:flex;gap:.5625rem;-ms-flex-pack:center;justify-content:center;margin-top:1rem}.course-cover__dots button{width:.875rem;height:.875rem;padding:0;background:var(--kit-gray);border:0;border-radius:6.25rem;cursor:pointer}.course-cover__dots button.is-active{width:2rem;background:var(--kit-accent)}.course-cover.has-no-image .course-cover__media{height:7.5rem}@media(min-width:768px){.course-cover__media{height:31.25rem}.course-cover__info{margin-top:-6.3125rem}.course-cover__shape{top:.75rem}.course-cover__shape:before{top:-3rem;height:9.375rem}.course-cover__content{grid-template-areas:"heading heading" "facts buy";grid-template-columns:1fr 1fr;gap:2.5rem 1rem;padding:0 0 3rem}.course-cover h1{font-size:2rem}.course-cover__teacher-name{font-size:1.125rem}.course-cover__buy{gap:2rem}.course-cover__price strong{font-size:1.5rem}.course-cover__actions{max-width:15.6875rem}.course-cover__lessons:before{background:linear-gradient(var(--course-cover-color) 0 190px,var(--kit-white) 190px)}.course-cover__lessons-heading h2{font-size:1.625rem}.course-cover__arrows{display:-ms-flexbox;display:flex}.course-cover__dots{display:none}}@media(min-width:1280px){.course-cover{--course-cover-gutter:1.5rem;min-height:45rem;background:var(--kit-black)}.course-cover__media{position:absolute;inset:0;height:100%}.course-cover__gradient{position:absolute;inset:auto 0 0;display:block;height:27.5rem;background:-webkit-gradient(linear,left top,left bottom,from(transparent),to(#000413));background:linear-gradient(transparent,#000413);pointer-events:none}.course-cover.is-playing .course-cover__gradient{z-index:2;-webkit-mask-image:-webkit-gradient(linear,left top,left bottom,from(#000),to(transparent));-webkit-mask-image:linear-gradient(#000 calc(100% - 10rem),transparent);mask-image:-webkit-gradient(linear,left top,left bottom,from(#000),to(transparent));mask-image:linear-gradient(#000 calc(100% - 10rem),transparent)}.course-cover.is-playing .course-cover__breadcrumbs{visibility:hidden}.course-cover__info{margin-top:0;width:42.375rem;min-height:45rem}.course-cover__shape{inset:auto;top:12rem;left:calc(-22.3125rem - var(--course-cover-bleed));width:calc(61.7524375rem + var(--course-cover-bleed) - var(--course-cover-gutter));height:52.7109375rem;-webkit-transform:rotate(7deg);transform:rotate(7deg)}.course-cover__shape:before{display:none}.course-cover__content{width:38rem;margin-left:0;padding:14.25rem 0 1.5rem}.course-cover__facts{gap:.5rem}.course-cover__fact{-ms-flex-align:start;align-items:flex-start}.course-cover__dates .course-cover__muted{display:block}.course-cover__buy{gap:2rem}.course-cover__actions{width:15.6875rem}.course-cover__lessons{position:absolute;top:28.125rem;left:calc(58.333% + .5rem);width:calc(41.667% - .5rem);padding:0;color:var(--kit-white);background:transparent}.course-cover__lessons:before{display:none}.course-cover__lessons-heading{margin-bottom:1.0625rem}.course-cover__lesson{-ms-flex-preferred-size:12rem;flex-basis:12rem}.course-cover__close{top:10.375rem}.course-cover.is-playing .course-cover__info{-webkit-transform:translate(calc(-100% - var(--course-cover-bleed) + clamp(6.875rem, calc(15.625vw - 90px), 13.125rem)),clamp(18.75rem,calc(-3.125vw + 340px),17.5rem)) rotate(-17deg);transform:translate(calc(-100% - var(--course-cover-bleed) + clamp(6.875rem, calc(15.625vw - 90px), 13.125rem)),clamp(18.75rem,calc(-3.125vw + 340px),17.5rem)) rotate(-17deg);pointer-events:none}.course-cover.is-playing .course-cover__content{visibility:hidden}.course-cover.has-no-image .course-cover__media{height:100%}}@media(min-width:1440px){.course-cover,.course-cover__info{min-height:clamp(45rem,calc(28.125vw + 360px),56.25rem)}.course-cover__info{width:clamp(42.375rem,calc(40.9375vw + 154px),58.75rem)}.course-cover__shape{left:calc(clamp(-8.75rem, calc(4.4859375vw - 197.42px), -6.955625rem) - var(--course-cover-bleed));top:clamp(11.875rem,calc(8.7578125vw + 77.9px),15.378125rem);width:calc(clamp(47.5rem, calc(35.63109375vw + 303.922px), 61.7524375rem) + var(--course-cover-bleed) - var(--course-cover-gutter));height:clamp(47.5rem,calc(13.02734375vw + 593.25px),52.7109375rem)}.course-cover__content{width:clamp(38rem,calc(25.9375vw + 276px),48.375rem);padding-top:clamp(14.25rem,calc(4.21875vw + 174px),15.9375rem);grid-template-areas:"heading" "buy" "facts";grid-template-columns:1fr;gap:clamp(2.5rem,calc(6.25vw - 40px),5rem)}.course-cover h1{font-size:clamp(2rem,calc(2.5vw + 0px),3rem)}.course-cover__teachers{margin-top:1.875rem}.course-cover__buy{gap:1.875rem}.course-cover__price strong{font-size:clamp(1.5rem,calc(1.25vw + 8px),2rem)}.course-cover__actions{-ms-flex-direction:row;flex-direction:row;width:auto;max-width:none}.course-cover__actions .kit-button{width:auto}.course-cover__facts{display:grid;grid-template-columns:minmax(0,1.3fr) minmax(0,1fr);grid-gap:1rem;gap:1rem;font-size:1.125rem}.course-cover__fact{-ms-flex-align:center;align-items:center}.course-cover__dates{-ms-flex-negative:0;flex-shrink:0}.course-cover__dates .course-cover__muted{display:inline}.course-cover__lessons{top:clamp(28.125rem,calc(21.875vw + 170px),36.875rem)}.course-cover__lesson{-ms-flex-preferred-size:clamp(12rem,calc(16.71875vw - 22px),18.6875rem);flex-basis:clamp(12rem,calc(16.71875vw - 22px),18.6875rem)}}@media(prefers-reduced-motion:reduce){.course-cover__info{-webkit-transition:none;transition:none}}.modal--course-fragment{background:#000413}.modal--course-fragment .modal__body,.modal--course-fragment .modal__content,.modal--course-fragment .modal__dialog,.modal--course-fragment .modal__wrap{width:100%;height:100%;max-width:none;padding:0;margin:0;border-radius:0;background:transparent}.modal--course-fragment .course-cover__player--modal{position:fixed;inset:0;height:100dvh;background:#000413}.modal--course-fragment .course-cover__player--modal video{-o-object-fit:contain;object-fit:contain}.modal--course-fragment .course-cover__player--modal .course-cover__close{top:max(1rem,env(safe-area-inset-top));right:max(1rem,env(safe-area-inset-right));background:#1f222f}.modal--course-fragment .course-cover__player--modal .course-cover__error{color:#fff}