:root{--ink:#213f36;--green:#285d4c;--paper:#f6f8f3;--yellow:#f2d783;--muted:#5b6c63;--line:#dbe4da;--peach:#f4ded0;--lilac:#e3e7fa;font-family:'Golos Text',sans-serif;color:var(--ink);background:var(--paper);font-synthesis:none;-webkit-text-size-adjust:100%;text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:24px}
*{box-sizing:border-box}body{margin:0;min-width:0}a{color:inherit;text-underline-offset:4px}button,input{font:inherit}button,a,input,summary{touch-action:manipulation}a,button{-webkit-tap-highlight-color:transparent}button{cursor:pointer}img,svg{max-width:100%}button:focus-visible,a:focus-visible,summary:focus-visible,input:focus-visible{outline:3px solid #bc793a;outline-offset:5px}[hidden]{display:none!important}.wrap{width:min(1180px,100% - 64px);margin-inline:auto}.skip{position:fixed;top:-80px;left:16px;z-index:10;background:white;padding:14px}.skip:focus{top:12px}.promo-header{display:flex;align-items:center;justify-content:space-between;gap:24px;min-height:102px}.wordmark{display:flex;gap:10px;align-items:center;font-family:'Nunito Sans',sans-serif;font-size:28px;font-weight:900;text-decoration:none;letter-spacing:-1px;white-space:nowrap}.wordmark img{flex:none}.promo-header nav{display:flex;gap:30px;align-items:center;font-size:14px}.promo-header nav a{display:inline-flex;align-items:center;min-height:44px;text-decoration:none}.promo-header nav a:hover{text-decoration:underline}.promo-header .header-login{gap:24px;border:1px solid #b8c7bb;border-radius:99px;padding:8px 21px}.header-login span{font-size:20px}
h1,h2,h3{font-family:'Nunito Sans',sans-serif;letter-spacing:-.045em;text-wrap:balance}h1{font-size:clamp(40px,5.2vw,68px);line-height:1.05;font-weight:800;margin:22px 0 28px}h2{font-size:clamp(30px,3.3vw,44px);line-height:1.14;font-weight:800;margin:14px 0 22px}h3{font-size:23px;line-height:1.25;margin:16px 0 12px;font-weight:800;letter-spacing:-.025em}p{line-height:1.65;margin:0 0 20px}.eyebrow{font-size:13px;line-height:1.5;letter-spacing:.02em;font-weight:500;margin:0;color:var(--muted)}.status-dot{display:inline-block;width:7px;height:7px;background:var(--green);border-radius:50%;margin:0 8px 1px 0}.hero{display:grid;grid-template-columns:1fr 1fr;gap:32px;align-items:center;padding:44px 0 86px}.hero-copy{min-width:0}.underlined{position:relative;isolation:isolate;white-space:nowrap}.underlined:after{content:'';position:absolute;height:12px;background:var(--yellow);left:0;right:0;bottom:4px;border-radius:50%;transform:rotate(-2deg);z-index:-1}.hero-lead{font-size:20px;line-height:1.55;max-width:455px;margin-bottom:18px}.hero-detail{font-size:15px;color:var(--muted);line-height:1.65;margin-bottom:28px}.button{border:0;display:inline-flex;align-items:center;justify-content:space-between;gap:40px;min-height:56px;padding:16px 26px;background:var(--green);color:white;border-radius:14px;text-decoration:none;font-size:16px;font-weight:500}.button span{font-size:21px;line-height:1}.button:hover{background:#174433}.button:disabled{opacity:.65;cursor:wait}.quiet{font-size:12px;line-height:1.7;color:var(--muted);margin:12px 0 0}
.demo{position:relative;min-width:0;padding:52px 16px 14px;isolation:isolate}.demo:before{content:'';position:absolute;inset:18px 0 60px 8px;background:#e3eee4;border-radius:48% 38% 44% 41%;z-index:-1;transform:rotate(8deg)}.demo-label{position:absolute;right:17px;top:0;display:flex;gap:8px;align-items:center;font-size:15px;transform:rotate(5deg);color:#5b7160}.demo-label svg{width:67px;height:50px;fill:none;stroke:#839778;stroke-width:2;stroke-linecap:round}.notebook{position:relative;transform:rotate(-5deg);margin:0 24px 0 12px;background:#fffef8;border-radius:6px 22px 22px 6px;box-shadow:0 18px 34px -26px #2f513b80,5px 5px 0 #eeeedd,9px 9px 0 #d1dbcd;border:1px solid #dce2d1;min-height:285px}.notebook:before{content:'';position:absolute;left:44px;top:0;bottom:0;width:1px;background:#e8b7a1}.paper-tag{position:absolute;left:23px;top:-16px;display:block;padding:8px 22px;background:var(--yellow);font-size:13px;transform:rotate(1deg);border-radius:2px;color:#635528}.paper-content{padding:43px 20px 54px 65px;min-height:285px;background-image:linear-gradient(transparent 31px,#d1dedb70 32px);background-size:100% 32px;background-position:0 30px;border-radius:inherit}.paper-content>p:first-child{font-size:13px;margin-bottom:13px;color:#728270}.written{font-family:'Nunito Sans',sans-serif;font-weight:700;font-size:36px;letter-spacing:1px;margin:0 0 16px;line-height:1.4}.written span{border:2px solid #b37e6d;border-radius:50%;padding:0 6px}.paper-question{font-size:15px;max-width:270px;margin:0;color:#597260}.paper-doodle{position:absolute;width:110px;height:65px;bottom:14px;right:12px;stroke:#a3b9a5;fill:none;stroke-width:2}.hint{position:relative;transform:rotate(2deg);margin:-30px 0 0 65px;background:white;padding:20px 23px;border-radius:20px 20px 20px 4px;box-shadow:0 12px 30px -22px #1f3b2b90;border:1px solid #d1ddcf;min-height:165px}.hint-label{display:flex;align-items:center;gap:8px;font-size:13px;font-weight:500}.hint p{font-size:19px;line-height:1.45;margin:13px 0}.hint-note{font-size:11px;color:#7a877c}.demo-tabs{display:flex;gap:5px;justify-content:center;flex-wrap:wrap;margin-top:28px}.demo-tabs button{min-height:44px;padding:8px 14px;border:0;border-radius:99px;font-size:12px;background:transparent;color:var(--muted)}.demo-tabs button[aria-pressed=true]{background:white;color:var(--ink);box-shadow:0 1px 0 #c8d5c8}.demo-tabs button:hover{background:#fff9}.demo[data-example=english] .notebook{background-color:#f5f6ff}.demo[data-example=russian] .notebook{background-color:#fff8ef}.demo[data-example=russian] .written{font-size:27px}.demo[data-example=english] .written{font-size:28px;letter-spacing:0}
.how{border-top:1px solid var(--line);padding:60px 0 72px;display:grid;grid-template-columns:.85fr 2fr;gap:60px}.steps{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:27px;counter-reset:steps}.steps li{min-width:0;counter-increment:steps;position:relative;padding-top:8px}.steps li:before{content:counter(steps);position:absolute;right:0;top:10px;font-size:12px;color:#8b9c8d}.step-icon{font-family:'Nunito Sans';display:grid;place-items:center;width:55px;height:55px;border-radius:17px;background:#e5ece0;color:#486747;font-size:32px}.steps li:nth-child(2) .step-icon{background:var(--peach);color:#855b40;transform:rotate(5deg)}.steps li:nth-child(3) .step-icon{background:var(--lilac);color:#626b94;transform:rotate(-4deg)}.steps h3{font-size:21px}.steps p{font-size:14px;color:var(--muted);line-height:1.65;margin:0}.subjects{padding:28px 0 70px}.subject-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px;margin-top:28px}.subject-card{display:block;padding:30px 28px;border-radius:25px;text-decoration:none;min-width:0}.math-card{background:#e6eddf}.russian-card{background:var(--peach)}.english-card{background:var(--lilac)}.subject-art{display:flex;align-items:center;gap:4px;font-family:'Nunito Sans';font-weight:800;font-size:49px;letter-spacing:1px;height:82px;opacity:.78}.subject-art i{font-style:normal;display:inline-block;transform:rotate(-12deg);color:#718656}.root-mark{border-top:2px solid;border-radius:50%}.subject-art .sound-waves{font-family:serif;font-size:30px;letter-spacing:-6px;transform:rotate(-15deg);margin-left:10px}.subject-card h3{display:flex;justify-content:space-between;gap:10px;font-size:24px}.subject-card h3 span{font-size:23px}.subject-card p{font-size:15px;max-width:280px;margin:0;color:#4e6356}.subject-card:hover h3{text-decoration:underline;text-underline-offset:5px}.parents-note{display:flex;align-items:center;gap:26px;padding:32px 0 45px;border-bottom:1px solid var(--line)}.note-mark{width:64px;height:64px;color:#93a67f;line-height:1;flex:none}.parents-note h2{font-size:27px;margin:0 0 10px}.parents-note p{max-width:660px;font-size:15px;color:var(--muted);margin:0}.text-link{font-size:14px;font-weight:500;text-decoration:none;border-bottom:1px solid currentColor;padding-block:10px;display:inline-block}.parents-note>.text-link{margin-left:auto;flex:none}.home-faq{display:grid;grid-template-columns:1fr 1.5fr;gap:65px;padding:70px 0 90px}.home-faq h2{margin:0}.faq-list{min-width:0}.faq-list details{border-bottom:1px solid var(--line)}.faq-list summary{display:flex;justify-content:space-between;gap:20px;font-size:16px;font-weight:500;padding:22px 0;cursor:pointer;list-style:none;line-height:1.5}.faq-list summary::-webkit-details-marker{display:none}.faq-list summary span{font-size:22px;font-weight:400;flex:none}.faq-list details[open] summary span{transform:rotate(45deg)}.faq-list p{font-size:15px;line-height:1.8;color:var(--muted);padding-right:22px;margin:0 0 24px}.invite{display:flex;align-items:center;justify-content:space-between;gap:38px;border-radius:28px;padding:48px 56px;background:#285d4c;color:#fffefa;margin-bottom:62px}.invite .eyebrow{color:#c3dbc6}.invite h2{font-size:42px;margin:10px 0 14px}.invite p{margin-bottom:0;font-size:15px}.invite-action{min-width:260px}.button-light{background:#f5dc91;color:#304832;width:100%}.button-light:hover{background:#ffe8a9}.invite-action p{font-size:12px;color:#c3dbc6;margin-top:12px;text-align:center}.promo-footer{display:grid;grid-template-columns:.9fr 1fr 1.1fr;gap:25px;padding-bottom:40px;align-items:start}.promo-footer .wordmark{font-size:23px}.promo-footer nav{display:grid;gap:12px;font-size:13px}.promo-footer nav a{text-decoration:none}.promo-footer nav a:hover{text-decoration:underline}.promo-footer p{font-size:12px;color:var(--muted);line-height:1.8}
.article{padding:24px 0 75px}.breadcrumb{display:flex;gap:12px;align-items:center;font-size:12px;margin-bottom:45px;flex-wrap:wrap;color:var(--muted)}.breadcrumb a{text-decoration:none}.article h1{max-width:930px;font-size:clamp(39px,4.7vw,62px);margin-top:18px}.article-lead{max-width:780px;font-size:20px;line-height:1.7;color:var(--muted);margin-bottom:52px}.article-layout{display:grid;grid-template-columns:250px minmax(0,720px);gap:70px;justify-content:space-between}.contents{align-self:start;position:sticky;top:24px;display:grid;gap:14px;padding:22px 24px;background:#e9efe5;border-radius:18px;font-size:13px}.contents p{font-weight:600;margin:0}.contents a{text-decoration:none;line-height:1.5}.contents a:hover{text-decoration:underline}.article-copy{min-width:0}.article-copy section{margin:0 0 44px}.article-copy h2{font-size:29px;margin:0 0 18px;line-height:1.2}.article-copy p,.article-copy li{font-size:16px;line-height:1.85;color:#40584b}.article-copy li{padding-left:5px;margin-bottom:13px}.article-copy ol{padding-left:23px}.example{padding:24px 28px;background:#fffdf5;border-radius:18px;border:1px solid #e5e4d5;margin:25px 0}.example span{display:block;font-size:12px;color:#71806d;margin-bottom:10px}.example p:last-child{margin-bottom:0}.updated{font-size:12px!important;color:#80907e!important}.related{margin-top:30px;padding-top:30px;border-top:1px solid var(--line);display:grid;gap:12px}.related h2{font-size:27px}.related a{padding:18px 20px;border-radius:12px;background:white;text-decoration:none;display:flex;justify-content:space-between;gap:20px;font-size:15px}.related a:hover{background:#eaf0e5}.article>.faq-list{max-width:820px;margin-bottom:10px}.login-body main{min-height:65vh;padding:35px 0 90px}.login-card{max-width:480px;background:white;border:1px solid var(--line);border-radius:24px;padding:34px 38px}.login-card h1{font-size:35px;line-height:1.15;margin:14px 0 20px}.login-card>p:not(.eyebrow){font-size:14px;color:var(--muted)}.login-card form{margin-top:24px}.login-card label{display:block;font-size:14px;margin-bottom:8px}.login-card input{width:100%;min-width:0;height:55px;padding:12px 14px;background:var(--paper);border:1px solid #aabaad;border-radius:10px;font-size:18px}.login-card button{width:100%;margin-top:20px}.login-card .text-link{margin-top:22px}.login-error{font-size:14px;color:#a0392f;margin:10px 0 0}.login-body .promo-footer{border-top:1px solid var(--line);padding-top:32px}
@media(min-width:1000px) and (prefers-reduced-motion:no-preference){.notebook{animation:arrive-paper .7s ease-out both}.hint{animation:arrive-hint .7s .18s ease-out both}@keyframes arrive-paper{from{opacity:0;transform:rotate(-8deg) translateY(15px)}to{opacity:1;transform:rotate(-5deg)}}@keyframes arrive-hint{from{opacity:0;transform:rotate(2deg) translateY(15px)}to{opacity:1;transform:rotate(2deg)}}}
@media(max-width:980px){.hero{gap:12px;padding-top:38px}h1{font-size:48px}.hero-lead{font-size:18px}.hero-detail{font-size:14px}.demo{padding-left:0;padding-right:0}.notebook{margin-right:10px;margin-left:4px}.paper-content{padding-left:56px;padding-right:12px}.written{font-size:30px}.hint{margin-left:28px;padding:18px}.hint p{font-size:17px}.demo-tabs button{padding-inline:9px}.how{grid-template-columns:1fr;gap:20px}.how .section-heading h2 br{display:none}.subject-card{padding:24px 20px}.subject-card h3{font-size:21px}.parents-note{flex-wrap:wrap}.parents-note>div{flex:1}.parents-note>.text-link{margin-left:95px}.article-layout{grid-template-columns:210px minmax(0,1fr);gap:35px}.invite{padding:40px 32px}.invite h2{font-size:35px}}
@media(max-width:700px){.wrap{width:calc(100% - 36px)}.promo-header{min-height:78px;gap:12px}.wordmark{font-size:23px;gap:7px}.wordmark img{width:31px;height:31px}.promo-header nav{gap:0}.promo-header nav>a:not(.header-login){display:none}.promo-header .header-login{padding:8px 14px;gap:10px;min-height:42px;font-size:13px}.hero{grid-template-columns:1fr;padding-top:30px;padding-bottom:40px;gap:36px}.hero h1{font-size:clamp(40px,9vw,58px);margin:20px 0 26px;letter-spacing:-.05em}.hero-lead{font-size:18px;line-height:1.55}.hero-detail{font-size:14px;line-height:1.7}.hero-copy>.button{min-width:240px}.demo{max-width:465px;width:100%;margin:auto;padding:48px 8px 8px}.demo:before{inset:16px 0 55px;transform:none}.demo-label{font-size:14px;right:15px}.notebook{margin:0 15px 0 8px;min-height:245px}.paper-content{min-height:245px;padding-top:36px;padding-bottom:45px}.written{font-size:32px}.hint{margin:-26px 0 0 38px;min-height:148px;padding:17px 20px}.hint p{font-size:17px}.hint-label{font-size:12px}.hint-label img{width:24px;height:24px}.demo-tabs{margin-top:22px}.demo-tabs button{font-size:12px;padding:8px 12px}.how{padding:40px 0 46px;gap:16px}.how .section-heading h2 br{display:initial}.steps{grid-template-columns:1fr;gap:28px}.steps li{padding:0 25px 0 77px;min-height:76px}.step-icon{position:absolute;left:0;top:0;width:53px;height:53px}.steps h3{margin:0 0 8px;font-size:22px}.steps p{font-size:14px}.steps li:before{top:3px}.subjects{padding:5px 0 42px}.subject-grid{grid-template-columns:1fr;gap:14px;margin-top:24px}.subject-card{padding:23px 26px;display:grid;grid-template-columns:1fr 105px;gap:8px 18px}.subject-art{grid-column:2;grid-row:1/3;font-size:36px;height:auto;align-self:center;justify-content:center;letter-spacing:0}.subject-art .sound-waves{font-size:23px;margin-left:0}.subject-card h3{grid-column:1;font-size:23px;margin:0;line-height:1.2}.subject-card h3 span{display:none}.subject-card p{grid-column:1;font-size:14px}.parents-note{padding:10px 0 35px;gap:18px}.note-mark{width:44px;height:44px;align-self:start;margin-top:4px}.parents-note h2{font-size:25px;line-height:1.1}.parents-note p{font-size:14px}.parents-note>.text-link{margin-left:64px}.home-faq{grid-template-columns:1fr;gap:20px;padding:40px 0 50px}.home-faq h2 br{display:none}.faq-list summary{font-size:15px;padding:19px 0}.faq-list p{font-size:14px;line-height:1.75}.invite{display:block;padding:29px 25px;border-radius:23px;margin-bottom:40px}.invite h2{font-size:34px}.invite>div>p{font-size:14px}.invite-action{min-width:0;margin-top:25px}.invite-action .button{justify-content:space-between}.invite-action p{font-size:12px}.promo-footer{grid-template-columns:1fr;gap:22px;padding-bottom:30px}.promo-footer nav{grid-template-columns:1fr 1fr;gap:16px;font-size:13px}.promo-footer p{margin:0;font-size:12px}.article{padding:18px 0 45px}.breadcrumb{margin-bottom:32px}.article h1{font-size:39px;line-height:1.1}.article h1 br{display:none}.article-lead{font-size:17px;margin-bottom:28px}.article-layout{grid-template-columns:1fr;gap:32px}.contents{position:static;padding:22px;gap:14px}.article-copy h2{font-size:27px}.article-copy p,.article-copy li{font-size:16px;line-height:1.8}.article-copy section{margin-bottom:34px}.example{padding:22px}.related{margin-top:5px}.related a{font-size:14px;line-height:1.5}.login-body main{padding:25px 0 55px}.login-card{padding:28px 24px}.login-card h1{font-size:31px}}
@media(max-width:350px){.wrap{width:calc(100% - 28px)}.wordmark{font-size:21px}.wordmark img{width:28px;height:28px}.promo-header .header-login{padding-inline:12px;gap:6px}.hero h1{font-size:37px}.hero-detail br{display:none}.demo-tabs button{padding-inline:8px;font-size:11px}.subject-card{grid-template-columns:1fr 76px;padding:22px}.subject-art{font-size:28px}.hint{margin-left:23px}.paper-content{padding-left:50px}.written{font-size:28px}.article h1{font-size:35px}.invite{padding:26px 22px}}
@media(prefers-reduced-motion:reduce){:root{scroll-behavior:auto}*,*:before,*:after{animation:none!important;transition:none!important}}