*,*::before,*::after{box-sizing:border-box}html,body{margin:0;padding:0;background:#fff}body{min-width:320px;-webkit-font-smoothing:antialiased}h1,h2,h3,p,ol,ul{margin:0}ol,ul{padding:0;list-style:none}a{color:#553984}a:hover{color:#3d2860}a:focus-visible,summary:focus-visible{outline:3px solid #553984;outline-offset:3px;border-radius:4px}.page{min-height:100svh;color:#241536;background:#fff;font-family:Nunito,system-ui,sans-serif}.skip{position:absolute;left:12px;top:-48px;z-index:20;padding:8px 12px;background:#3d2860;color:#fff;text-decoration:none}.skip:focus{top:12px}.container{max-width:1160px;margin:0 auto;padding-inline:20px}.header{border-bottom:1px solid #e8dff3;background:#fff}.header__inner{max-width:1160px;margin:0 auto;padding-inline:20px;height:64px;display:flex;align-items:center;justify-content:space-between;gap:16px}.header__login{padding:10px 4px;font-size:16px;font-weight:700;text-decoration:none}.logo{display:flex;align-items:center;gap:8px;color:#241536;text-decoration:none}.logo:hover{color:#241536}.logo__name{font-size:24px;font-weight:800;letter-spacing:-0.02em}.logo__beta{padding:2px 6px;font-size:11px;font-weight:700;text-transform:uppercase;letter-spacing:.06em;color:#553984;background:#f3eef8;border:1px solid #e8dff3;border-radius:4px}.mark{--s: 30px;--q: 10px;--n: 12px;--t: 19px;position:relative;flex:none;width:var(--s);height:var(--s)}.mark--md{--s: 24px;--q: 8px;--n: 9px;--t: 15px}.mark--sm{--s: 20px;--q: 7px;--n: 8px;--t: 12px}.mark__dots{position:absolute;bottom:0;left:0;display:grid;grid-template-columns:1fr 1fr;width:var(--q);height:var(--q);overflow:hidden;border-radius:2px}.mark__dots i:nth-child(1){background:#2d70ae}.mark__dots i:nth-child(2){background:#2d9da6}.mark__dots i:nth-child(3){background:#efa929}.mark__dots i:nth-child(4){background:#d5546d}.mark__bubble{position:absolute;inset:0;display:grid;place-items:center;padding-bottom:2px;font-size:calc(var(--s)*.7);font-weight:800;line-height:1;color:#fff;background:#3d2860;border-radius:calc(var(--s)/2) calc(var(--s)/2) calc(var(--s)/2) 0;clip-path:polygon(0 0, 100% 0, 100% 100%, var(--n) 100%, var(--n) var(--t), 0 var(--t))}.chip{align-self:flex-start;padding:6px 10px;font-size:14px;font-weight:700;color:#553984;background:#f3eef8;border-radius:4px}.button{display:inline-flex;align-items:center;justify-content:center;min-height:52px;padding:0 28px;background:#553984;color:#fff;font-size:17px;font-weight:800;text-decoration:none;border-radius:4px;box-shadow:0 1px 0 #3d2860;transition:background .2s ease}.button:hover{background:#3d2860;color:#fff}.button--light{background:#fff;color:#3d2860;box-shadow:none}.button--light:hover{background:#f3eef8;color:#241536}@media(max-width: 575px){.button{width:100%}}.textLink{padding:12px 2px;font-size:16px;font-weight:700;text-underline-offset:4px}.textLink--light{color:#fff}.textLink--light:hover{color:#f3eef8}.eyebrow{font-size:14px;font-weight:800;color:#553984}.sectionTitle{max-width:620px;font-size:clamp(28px,4vw,40px);font-weight:800;line-height:1.15;letter-spacing:-0.02em;text-wrap:balance}.sectionTitle--light{color:#fff}.sectionHead{display:flex;flex-direction:column;gap:12px}.badge{display:grid;place-items:center;flex:none;width:26px;height:26px;border-radius:4px;color:#fff;font-size:13px;font-weight:800}.badge--red{background:#d5546d}.badge--blue{background:#2d70ae}.badge--teal{background:#2d9da6}.badge--orange{background:#efa929;color:#241536}.badge--big{width:28px;height:28px;font-size:14px}.dot{width:8px;height:8px;border-radius:2px}.dot--red{background:#d5546d}.dot--blue{background:#2d70ae}.dot--teal{background:#2d9da6}.dot--orange{background:#efa929}.answers{display:grid;gap:8px;overflow-wrap:anywhere}.answers--hero{grid-template-columns:repeat(auto-fit, minmax(min(100%, 170px), 1fr))}.answers--student{grid-template-columns:repeat(auto-fit, minmax(min(100%, 190px), 1fr))}.answer{display:flex;align-items:center;gap:10px;padding:8px 10px;font-size:14px;font-weight:500;background:#fff;border:1px solid #e8dff3;border-radius:4px}.answer--correct{font-weight:700;border:1.5px solid #00c985;background:#eef7f6}.answer__tag{margin-left:auto;font-size:11px;font-weight:800;color:#00c985}.answer--big{padding:12px;font-size:16px;font-weight:700}.answer--selected{padding:11px;font-weight:800;border:2px solid #553984;background:#f3eef8}.hero{max-width:1160px;margin:0 auto;padding-inline:20px;display:grid;grid-template-columns:repeat(auto-fit, minmax(min(100%, 440px), 1fr));gap:clamp(40px,6vw,72px);align-items:center;padding-top:clamp(40px,7vw,88px);padding-bottom:clamp(56px,8vw,104px)}.hero__copy{display:flex;flex-direction:column;gap:24px;max-width:560px}.hero__title{font-size:clamp(36px,6vw,58px);font-weight:800;line-height:1.06;letter-spacing:-0.025em;text-wrap:balance}.hero__lead{font-size:clamp(17px,2vw,19px);line-height:1.6;color:#5a4a6e;text-wrap:pretty}.hero__actions{display:flex;flex-wrap:wrap;align-items:center;gap:12px 28px;padding-top:4px}.hero__visual{position:relative;padding:20px 0 28px}.hero__visual::before{content:"";position:absolute;inset:0 -20px 0 12%;background:#f3eef8;border-radius:4px}.editor{position:relative;overflow:hidden;background:#fff;border:1px solid #e8dff3;border-radius:6px;box-shadow:0 24px 48px -24px rgba(61,40,96,.35),0 2px 6px rgba(61,40,96,.06)}.editor__bar{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:12px 16px;border-bottom:1px solid #f3eef8}.editor__title{font-size:14px;font-weight:800}.editor__saved{display:flex;align-items:center;gap:6px;font-size:12px;color:#5a4a6e}.editor__dot{width:7px;height:7px;border-radius:50%;background:#2d9da6}.editor__body{display:flex;flex-direction:column;gap:14px;padding:16px 16px 68px}.editor__generate{display:flex;flex-wrap:wrap;gap:8px}.editor__input{flex:1 1 200px;padding:10px 12px;font-size:15px;font-weight:500;border:1.5px solid #553984;border-radius:4px}.editor__aiButton{display:inline-flex;align-items:center;padding:10px 14px;background:#553984;color:#fff;font-size:14px;font-weight:800;border-radius:4px}.editor__meta{display:flex;gap:8px;font-size:12px;font-weight:700;color:#5a4a6e}.editor__next{display:flex;align-items:center;gap:10px;min-height:44px;padding:0 12px;font-size:13px;color:#5a4a6e;border:1px dashed #e8dff3;border-radius:4px}.editor__nextIndex{font-weight:800;color:#241536}.editor__nextType{margin-left:auto;font-weight:700}.segment{display:flex;align-self:flex-start;gap:4px;padding:3px;font-size:13px;font-weight:700;background:#f3eef8;border-radius:4px}.segment__item{padding:5px 12px;border-radius:3px;color:#5a4a6e}.segment__item--active{background:#fff;color:#241536;box-shadow:0 1px 2px rgba(61,40,96,.12)}.qcard{display:flex;flex-direction:column;gap:12px;padding:16px;background:#fdfcfe;border:1px solid #e8dff3;border-radius:4px}.qcard__head{display:flex;justify-content:space-between;gap:8px;font-size:12px;font-weight:700;color:#5a4a6e}.qcard__question{font-size:18px;font-weight:800;line-height:1.35}.codeBadge{position:absolute;right:-8px;bottom:0;display:flex;flex-direction:column;gap:2px;padding:10px 14px;background:#241536;color:#fff;border-radius:4px;box-shadow:0 12px 24px -12px rgba(36,21,54,.6)}.codeBadge__label{font-size:11px;font-weight:700;color:#e8dff3}.codeBadge__code{font-size:22px;font-weight:800;letter-spacing:.12em}@media(max-width: 575px){.codeBadge{right:0}}.how{padding:clamp(56px,8vw,96px) 0;background:#f3eef8}.how .container{display:flex;flex-direction:column;gap:40px}.steps{display:grid;grid-template-columns:repeat(auto-fit, minmax(min(100%, 300px), 1fr));gap:20px}.step{display:flex;flex-direction:column;overflow:hidden;background:#fff;border:1px solid #e8dff3;border-radius:4px}.step__mock{display:flex;flex-direction:column;justify-content:center;min-height:236px;padding:20px;background:#fbf9fd;border-bottom:1px solid #e8dff3}.step__mock--center{align-items:center}.step__text{display:flex;flex-direction:column;gap:8px;padding:20px 20px 24px}.step__label{font-size:13px;font-weight:800;color:#553984}.step__title{font-size:20px;font-weight:800}.step__body{font-size:16px;line-height:1.55;color:#5a4a6e;text-wrap:pretty}.panel{display:flex;flex-direction:column;gap:10px;padding:12px;background:#fff;border:1px solid #e8dff3;border-radius:4px}.panel--results{gap:12px;padding:14px}.panel__text{font-size:14px;font-weight:700}.toolbar{display:flex;flex-wrap:wrap;gap:6px;padding-bottom:8px;font-size:12px;font-weight:800;color:#5a4a6e;border-bottom:1px solid #f3eef8}.toolbar__item{padding:2px 6px;border-radius:3px}.toolbar__item--on{background:#f3eef8;color:#241536}.toolbar__item--math{background:#f3eef8;color:#553984}.equation{font-family:"Cambria Math","Times New Roman",serif;font-style:italic;font-size:20px;text-align:center}.miniAnswers{display:grid;grid-template-columns:1fr 1fr;gap:6px;font-size:13px;font-weight:700}.miniAnswer{display:flex;align-items:center;gap:6px;padding:5px 8px;border:1px solid #e8dff3;border-radius:4px}.miniAnswer--correct{border:1.5px solid #00c985}.phone{display:flex;flex-direction:column;gap:12px;width:180px;padding:18px 14px 20px;background:#fff;border:1px solid #e8dff3;border-radius:14px;box-shadow:0 14px 28px -18px rgba(61,40,96,.45)}.phone__notch{align-self:center;width:44px;height:4px;border-radius:2px;background:#e8dff3}.phone__brand{display:flex;align-items:center;justify-content:center;gap:6px}.phone__name{font-size:16px;font-weight:800;letter-spacing:-0.02em}.phone__hint{font-size:12px;font-weight:700;color:#5a4a6e;text-align:center}.phone__input{padding:8px;font-size:20px;font-weight:800;letter-spacing:.14em;text-align:center;border:1.5px solid #553984;border-radius:4px}.phone__button{padding:8px;background:#553984;color:#fff;font-size:13px;font-weight:800;text-align:center;border-radius:4px}.results__head{display:flex;justify-content:space-between;font-size:12px;font-weight:800;color:#5a4a6e}.results__note{padding:8px 10px;font-size:12px;font-weight:700;color:#3d2860;background:#f3eef8;border-radius:4px}.bar{display:flex;flex-direction:column;gap:5px}.bar__row{display:flex;justify-content:space-between;font-size:13px;font-weight:700}.bar__track{height:8px;background:#f3eef8;border-radius:2px}.bar__fill{height:100%;border-radius:2px}.bar__fill--teal{background:#2d9da6}.bar__fill--blue{background:#2d70ae}.bar__fill--red{background:#d5546d}.why{padding:clamp(56px,8vw,104px) 0}.why .container{display:flex;flex-direction:column;gap:40px}.reasons{display:grid;grid-template-columns:repeat(auto-fit, minmax(min(100%, 280px), 1fr));gap:clamp(24px,4vw,48px)}.reason{display:flex;flex-direction:column;gap:12px;padding-top:20px;border-top:3px solid #e8dff3}.reason--lead{border-top-color:#553984}.reason__title{font-size:21px;font-weight:800;line-height:1.3}.reason__body{font-size:16px;line-height:1.6;color:#5a4a6e;text-wrap:pretty}.greek{padding:0 20px clamp(56px,8vw,104px)}.greek__panel{display:grid;grid-template-columns:repeat(auto-fit, minmax(min(100%, 360px), 1fr));gap:clamp(32px,5vw,64px);align-items:center;max-width:1160px;margin:0 auto;padding:clamp(28px,5vw,64px);background:#241536;color:#fff;border-radius:4px}.greek__copy{display:flex;flex-direction:column;gap:16px}.greek__lead{font-size:17px;line-height:1.6;color:#e8dff3;text-wrap:pretty}.studentCard{display:flex;flex-direction:column;gap:14px;padding:clamp(16px,3vw,24px);background:#fff;color:#241536;border-radius:4px}.studentCard__head{display:flex;justify-content:space-between;gap:8px;font-size:12px;font-weight:700;color:#5a4a6e}.studentCard__question{font-size:clamp(20px,2.6vw,24px);font-weight:800;line-height:1.3}.faq{padding:0 20px clamp(56px,8vw,104px)}.faq__inner{display:flex;flex-direction:column;gap:28px;max-width:760px;margin:0 auto}.faq__list{border-top:1px solid #e8dff3}.faqItem{border-bottom:1px solid #e8dff3}.faqItem__q{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:20px 0;font-size:18px;font-weight:800;list-style:none;cursor:pointer}.faqItem__q::-webkit-details-marker{display:none}.faqItem__icon{flex:none;font-size:24px;line-height:1;color:#553984;transition:transform .2s ease}.faqItem[open] .faqItem__icon{transform:rotate(45deg)}.faqItem__a{margin-bottom:20px;font-size:16px;line-height:1.6;color:#5a4a6e}.closing{padding:clamp(56px,8vw,88px) 20px;background:#553984;color:#fff}.closing__inner{display:flex;flex-direction:column;align-items:center;gap:20px;max-width:760px;margin:0 auto;text-align:center}.closing__title{font-size:clamp(30px,5vw,46px);font-weight:800;line-height:1.1;letter-spacing:-0.02em}.closing__lead{font-size:18px;line-height:1.6;color:#f3eef8;text-wrap:pretty}.closing a:focus-visible{outline-color:#fff}.research{padding:0 20px clamp(56px,8vw,104px)}.research__panel{display:grid;grid-template-columns:repeat(auto-fit, minmax(min(100%, 340px), 1fr));gap:clamp(32px,5vw,64px);align-items:center;max-width:1160px;margin:0 auto;padding:clamp(28px,5vw,64px);background:#f3eef8;border-radius:4px}.research__copy{display:flex;flex-direction:column;align-items:flex-start;gap:16px}.research__lead{font-size:17px;line-height:1.6;color:#5a4a6e;text-wrap:pretty}.research__visual{display:flex;flex-direction:column;gap:20px;padding:clamp(20px,3vw,28px);background:#fff;border:1px solid #e8dff3;border-radius:4px}.research__ring{display:flex;align-items:center;gap:20px}@media(max-width: 575px){.research__ring{flex-direction:column;align-items:flex-start;gap:16px}}.research__dial{flex:none;width:96px;height:96px}.research__ringText{display:flex;flex-direction:column;gap:6px;font-size:15px;line-height:1.5;color:#5a4a6e}.research__big{font-size:40px;font-weight:800;line-height:1;letter-spacing:-0.02em;color:#553984}.research__counts{display:flex;flex-wrap:wrap;gap:8px 12px;padding-top:20px;border-top:1px solid #e8dff3}.research__counts li{display:flex;align-items:baseline;gap:6px;padding:8px 12px;background:#fbf9fd;border:1px solid #e8dff3;border-radius:4px;font-size:14px;color:#5a4a6e}.research__counts strong{font-size:18px;font-weight:800;color:#553984}.footer{padding:28px 20px}.footer__inner{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;max-width:1160px;margin:0 auto;font-size:14px;color:#5a4a6e}.footer__brand{display:inline-flex;align-items:center;gap:8px}.footer__name{font-size:20px;font-weight:800;letter-spacing:-0.02em;color:#241536}.footer__links{display:flex;gap:20px}.footer__links a{font-weight:700}.article{max-width:760px;margin:0 auto;padding-inline:20px;display:flex;flex-direction:column;gap:clamp(40px,6vw,64px);padding-block:clamp(40px,7vw,88px)}.article__intro{display:flex;flex-direction:column;gap:16px}.article__title{font-size:clamp(34px,6vw,56px);font-weight:800;line-height:1.08;letter-spacing:-0.02em;text-wrap:balance}.article__lead{font-size:20px;line-height:1.5;color:#5a4a6e;text-wrap:pretty}.breadcrumb{font-size:14px;font-weight:700;color:#5a4a6e}.breadcrumb ol{display:flex;flex-wrap:wrap;gap:4px 8px}.breadcrumb li+li::before{content:"›";margin-right:8px}.breadcrumb a{text-decoration:none}.breadcrumb a:hover{text-decoration:underline}.articleSection{display:flex;flex-direction:column;gap:16px;scroll-margin-top:24px}.articleSection__title{font-size:clamp(24px,3.5vw,32px);font-weight:800;line-height:1.2;letter-spacing:-0.01em;text-wrap:balance}.articleSection p{font-size:18px;line-height:1.75;text-wrap:pretty}.articleSection p.articleSection__subtitle{font-size:18px;font-weight:700;line-height:1.4;color:#553984}.articleSection p.sources{font-size:14px;line-height:1.6;color:#5a4a6e}.articleSection a[href^="#ref-"]{padding:0 1px;font-weight:700;text-decoration:none}.articleSection a[href^="#ref-"]:hover{text-decoration:underline}.stats{display:grid;grid-template-columns:repeat(auto-fit, minmax(min(100%, 260px), 1fr));gap:16px}.stat{position:relative;display:flex;flex-direction:column;gap:8px;padding:20px;background:#fbf9fd;border:1px solid #e8dff3;border-top:3px solid #553984;border-radius:4px}.stat__value{font-size:clamp(30px,4vw,40px);font-weight:800;line-height:1.1;letter-spacing:-0.02em;color:#553984}.stat__text{font-size:15px;line-height:1.5;color:#5a4a6e;text-wrap:pretty}.stat__text a{font-weight:700;text-decoration:none}.stat--ring{padding-right:92px}.stat__ring{position:absolute;top:16px;right:16px;width:60px;height:60px}.ring__track,.ring__value{fill:none;stroke-width:4}.ring__track{stroke:#e8dff3}.ring__value{stroke:#553984;stroke-linecap:round}.figure{display:flex;flex-direction:column;gap:12px;margin:0;padding:20px;background:#fbf9fd;border:1px solid #e8dff3;border-radius:4px}.figure__svg{display:block;width:100%;height:auto}.figure__caption{font-size:14px;line-height:1.6;color:#5a4a6e;text-wrap:pretty}.curve{fill:none;stroke-width:3;stroke-linejoin:round}.curve--control{stroke:#5a4a6e;opacity:.55}.curve--quiz{stroke:#553984}.curve__shade{fill:#553984;opacity:.16}.curve__mean{stroke:#553984;stroke-width:2;stroke-dasharray:4 4}.curve__base{stroke:#e8dff3;stroke-width:2}.curve__percent{font-size:18px;font-weight:800;fill:#3d2860}.legend{display:flex;flex-wrap:wrap;gap:8px 20px;font-size:14px;font-weight:700;color:#5a4a6e}.legend__item{display:inline-flex;align-items:center;gap:8px}.legend__item::before{content:"";width:14px;height:14px;border-radius:50%}.legend__item--control::before{background:#5a4a6e;opacity:.55}.legend__item--quiz::before{background:#553984}.legend__item--shade::before{background:rgba(85,57,132,.16);border:1px solid #553984}.tips{display:flex;flex-direction:column;gap:16px}.tips li{position:relative;padding-left:24px;font-size:18px;line-height:1.7;text-wrap:pretty}.tips li::before{content:"";position:absolute;top:.7em;left:2px;width:8px;height:8px;background:#553984;border-radius:50%}.tips li a{font-weight:700;text-decoration:none}.references{padding-left:1.8em;list-style:decimal;font-size:15px;line-height:1.6;color:#5a4a6e}.references li{padding:2px 6px;border-radius:4px;overflow-wrap:anywhere;scroll-margin-top:24px}.references li+li{margin-top:12px}.references li:target{background:#f3eef8;outline:2px solid #e8dff3}.articleSection__question{margin-top:8px;font-size:19px;font-weight:800;line-height:1.35;text-wrap:balance}.avatars{display:grid;grid-template-columns:repeat(auto-fit, minmax(min(100%, 150px), 1fr));gap:16px}.avatar{display:flex;flex-direction:column;align-items:center;gap:8px;padding:16px;text-align:center;background:#fbf9fd;border:1px solid #e8dff3;border-radius:4px}.avatar__img{width:100%;max-width:140px;height:auto;border-radius:12px;background:#f3eef8}.avatar__you{display:flex;align-items:center;justify-content:center;width:100%;max-width:140px;aspect-ratio:5/7;font-size:36px;font-weight:800;color:#553984;background:#f3eef8;border-radius:12px}.avatar__name{font-size:18px;font-weight:800}.avatar__text{font-size:14px;line-height:1.5;color:#5a4a6e;text-wrap:pretty}.looks{display:flex;flex-wrap:wrap;justify-content:center;gap:16px}.looks img{display:block;width:160px;max-width:100%;height:auto}.tableWrap{overflow-x:auto}.priceTable{width:100%;border-collapse:collapse;font-size:15px;line-height:1.5}.priceTable__caption{padding-bottom:8px;font-size:15px;font-weight:700;text-align:left;color:#5a4a6e}.priceTable th,.priceTable td{padding:10px 12px;text-align:left;border-bottom:1px solid #e8dff3}.priceTable thead th{font-size:13px;font-weight:800;color:#5a4a6e;background:#fbf9fd}.priceTable tbody th{font-weight:700}.research--students .research__looks{display:flex;justify-content:center;gap:12px}.research--students .research__looks img{display:block;width:100%;max-width:120px;height:auto}