:root{--paper:#f8f8f1;--ink:#121521;--blue:#2449ee;--lime:#d9f367;--muted:#666b7a;--line:#d8d9d2;--max:1320px;--radius:14px}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:100px}body{margin:0;background:var(--paper);color:var(--ink);font-family:Arial,Helvetica,sans-serif;-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration:none}button{font:inherit}button,a,summary{-webkit-tap-highlight-color:transparent}button:focus-visible,a:focus-visible,summary:focus-visible{outline:3px solid var(--blue);outline-offset:6px}.section-blue a:focus-visible,.section-blue button:focus-visible{outline-color:var(--lime)}[hidden]{display:none!important}svg{width:24px;height:24px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round;flex-shrink:0}h1,h2,h3,h4,p{margin:0}h1,h2,h3,h4{text-wrap:balance}p{line-height:1.6}h2{font-size:clamp(34px,4.1vw,58px);line-height:1.06;letter-spacing:-2.4px;font-weight:800}section[id],article[id]{scroll-margin-top:100px}.container{width:min(var(--max),calc(100% - 96px));margin-inline:auto}.icon-library{position:absolute;width:0;height:0;overflow:hidden}.skip-link{position:fixed;left:20px;top:-100px;padding:16px;background:var(--lime);z-index:100}.skip-link:focus{top:12px}.header{height:90px;position:relative;z-index:10}.nav-row{height:100%;display:flex;align-items:center;gap:36px}.brand{display:inline-flex;align-items:center;gap:7px;white-space:nowrap;font-size:28px;letter-spacing:-1.3px;font-weight:850}.bracket{color:var(--blue);font-size:37px;font-weight:500;line-height:1}.navigation{display:flex;gap:28px;align-items:center;margin-left:auto;font-size:13px;font-weight:600}.navigation a{padding-block:12px;position:relative}.navigation a:after{position:absolute;content:"";bottom:6px;height:2px;background:var(--blue);left:0;right:100%;transition:right .2s}.navigation a:hover:after{right:0}.button{display:inline-flex;align-items:center;justify-content:center;gap:20px;min-height:58px;padding:17px 24px;background:var(--ink);color:#fff;border:1px solid var(--ink);border-radius:11px;font-size:15px;font-weight:700;line-height:1.3;transition:transform .2s,background .2s;white-space:nowrap}.button svg{width:21px;height:21px;color:var(--lime)}.button:hover{background:#293045;transform:translateY(-2px)}.button-small{min-height:42px;padding:10px 15px;font-size:12px;gap:12px;border-radius:9px}.button-small svg{width:17px;height:17px}.menu-toggle{display:none}.eyebrow{font-size:11px;line-height:1.4;font-weight:500;letter-spacing:1.3px;text-transform:uppercase;color:var(--muted)}.status-dot{display:inline-block;width:6px;height:6px;background:var(--blue);border-radius:50%;margin-right:7px;vertical-align:2px}.lime{color:var(--lime)}.blue{color:var(--blue)}
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100%)}.hero-description{font-size:18px;line-height:1.6;max-width:485px}.hero-actions{display:flex;align-items:center;gap:28px;flex-wrap:wrap;margin-top:28px}.text-link{display:inline-flex;gap:9px;font-size:13px;align-items:center;padding-block:14px;white-space:nowrap}.text-link svg{width:17px;height:17px}.text-link:hover{text-decoration:underline;text-underline-offset:5px}.trial-note{font-size:11px;color:var(--muted);margin-top:14px}.teacher-note{display:flex;align-items:center;gap:12px;margin-top:34px}.teacher-note p{font-size:12px;line-height:1.55;color:var(--muted)}.note-symbol{font-size:37px;line-height:1;color:var(--blue)}.hero-visual{position:relative;margin:0;height:600px;width:100%;min-width:0}.hero-document{background:#fff;width:310px;height:auto;min-height:460px;position:absolute;top:65px;left:7%;transform:rotate(-7deg);padding:25px 23px;box-shadow:0 13px 28px #080e3530;z-index:2;border-radius:3px}.paper-back{position:absolute;top:51px;left:5%;width:310px;height:460px;background:#dee5ff;transform:rotate(-11deg);border-radius:3px}.document-top{display:flex;align-items:center;justify-content:space-between;gap:10px;font-size:7px;letter-spacing:1px;color:#71788d}.hero-document h2{font-size:28px;letter-spacing:-1px;margin-top:20px}.document-subtitle{font-size:9px;margin-top:7px}.paper-rule{height:1px;background:#e2e4e9;margin-block:14px}.hero-document h3{font-size:11px;line-height:1.4;margin-top:15px;letter-spacing:-.15px}.hero-document p:not(.document-subtitle){font-size:8px;line-height:1.5;margin-top:6px;max-width:225px}.hero-equation{font-family:Georgia,serif;font-size:23px;line-height:1.6;text-align:center;padding-top:5px;padding-bottom:7px}.hero-equation span{display:block;font-size:15px;line-height:1.55}.hero-equation strong{display:inline-block;font-size:17px;font-weight:400;background:#e9f5c8;padding:0 14px;line-height:1.5}.hand-note{position:absolute;right:13px;top:210px;transform:rotate(-9deg);font-family:Georgia,serif;font-style:italic;font-size:13px;color:#2e7c35;line-height:1.3}.lesson-list{list-style:none;margin:10px 0 0;padding:0;counter-reset:lesson}.lesson-list li{display:flex;align-items:center;gap:6px;font-size:8px;line-height:1.5;margin-top:8px;counter-increment:lesson}.lesson-list li:before{content:counter(lesson);display:flex;align-items:center;justify-content:center;background:#e7edff;color:var(--blue);height:16px;width:16px;border-radius:50%;flex-shrink:0}.lesson-list b{margin-left:auto;font-size:7px}.paper-footer{border-top:1px solid #e7e8eb;padding-top:10px;margin-top:18px;display:flex;justify-content:space-between;gap:14px;font-size:7px;color:#888e9b}.hero-document .paper-footer{position:static;margin-top:18px}.chat-preview{position:absolute;right:-1%;top:110px;width:236px;background:#e6effc;border-radius:13px;overflow:hidden;box-shadow:0 16px 32px #092a8438;transform:rotate(3deg);z-index:3;border:1px solid #d9e1fa}.chat-header{display:flex;align-items:center;gap:9px;padding:15px 12px;background:#fff}.telegram-icon{width:33px;height:33px;border-radius:50%;display:grid;place-items:center;background:#2caaea;color:#fff}.telegram-icon svg{width:21px;height:21px}.chat-header b{font-size:12px}.chat-header small{display:block;font-size:9px;color:#8993a5;margin-top:4px}.chat-dots{font-size:25px;margin-left:auto;color:#858da0}.chat-body{padding:14px 10px;display:flex;flex-direction:column;gap:13px;min-height:272px;background-image:radial-gradient(#b3c6e74d .5px,transparent .5px);background-size:11px 11px}.chat-message{font-size:10px;line-height:1.5;padding:11px 12px;border-radius:10px;max-width:95%;box-shadow:0 2px 3px #8ca0b617}.outgoing{background:#e9f9bb;align-self:flex-end;border-bottom-right-radius:2px}.incoming{background:#fff;align-self:flex-start;border-bottom-left-radius:2px}.chat-time{display:block;color:#6586a9;text-align:right;font-size:8px;margin-top:7px}.attachment{display:flex;align-items:center;gap:9px}.pdf-icon{display:inline-flex;align-items:center;justify-content:center;flex-shrink:0;width:32px;height:39px;background:#f04b40;color:#fff;border-radius:3px 8px 3px 3px;font-size:8px;font-weight:700;position:relative}.pdf-icon:before{content:"";position:absolute;top:0;right:0;border-top:9px solid #fff9;border-left:9px solid transparent}.attachment b{font-size:9px}.attachment small{display:block;font-size:8px;color:#7b8495;margin-top:5px}.chat-input{display:flex;justify-content:space-between;align-items:center;background:#fff;padding:10px 13px;color:#a4abbb;font-size:10px}.chat-input svg{width:20px;height:20px;color:var(--blue)}.hero-visual 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.section-space{padding-block:96px}.section-blue{background:var(--blue);color:#fff}.features{padding-block:58px 54px}.section-heading{display:flex;justify-content:space-between;align-items:flex-end;gap:24px;margin-bottom:45px}.section-heading .eyebrow{margin-bottom:17px}.section-blue .eyebrow{color:#ccd5ff}.section-index{font-size:12px;letter-spacing:1px;white-space:nowrap;margin-bottom:5px}.feature-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr))}.feature{padding:0 26px;border-left:1px solid #ffffff45}.feature:first-child{padding-left:0;border:0}.feature:last-child{padding-right:0}.feature-heading{display:flex;align-items:center;gap:12px;min-height:51px}.outline-number{color:transparent;-webkit-text-stroke:1px #dce4ff;font-size:51px;line-height:1;font-weight:600;letter-spacing:-3px;flex-shrink:0}.feature h3{font-size:18px;line-height:1.2;letter-spacing:-.4px;text-wrap:wrap}.feature>p{font-size:12px;line-height:1.6;color:#e2e7ff;margin-top:17px;min-height:58px;max-width:250px}.mini-paper{height:158px;background:#fff;border-radius:6px;color:var(--ink);padding:17px 17px 12px;margin-top:24px;overflow:hidden;position:relative;box-shadow:0 6px 10px #1632c722}.mini-paper>b{display:block;font-size:10px;font-weight:800}.mini-sub{font-size:6px;color:#8a92a5;display:block;margin-top:6px;margin-bottom:13px}.mini-line{height:4px;background:#dfe3ee;margin-block:7px;border-radius:1px;width:95%}.mini-line:nth-child(2n){width:74%}.mini-line.blue-line{background:#abbbe9;width:63%}.mini-line.short{width:60%}.mini-row{display:flex;align-items:center;gap:6px;margin-top:8px}.mini-row i{font-style:normal;font-size:6px;color:var(--blue);background:#e4eaff;border-radius:50%;height:11px;width:11px;display:grid;place-items:center}.mini-row .mini-line{margin:0;flex:1}.mini-task{font-size:8px;margin-block:10px}.mini-tag{background:#e9f5cc;color:#344531;font-size:7px;padding:4px 7px;display:inline-block}.mini-check{display:flex;gap:8px;align-items:center;margin-top:7px}.mini-check span{font-size:12px;color:#399555;font-weight:800}.mini-check.error span{color:#e45c4c}.mini-check .mini-line{flex:1;margin:0}.mini-highlight{background:#ecf5d8;margin:7px 0 0 19px;padding:5px;font-size:6px;max-width:130px}.mini-equation{text-align:center;line-height:1.8;font-family:Georgia,serif;font-size:18px;margin-top:9px}.mini-equation span{font-size:14px}.mini-equation mark{font-size:15px;padding:2px 8px}.feature>a{display:flex;align-items:center;justify-content:space-between;gap:8px;font-size:11px;margin-top:20px;color:#edf1ff;padding-block:5px}.feature>a span{color:var(--lime);font-size:18px}.feature>a:hover{text-decoration:underline;text-underline-offset:5px}.mobile-break{display:none}.heading-aside{font-size:14px;color:var(--muted);max-width:240px;line-height:1.6;padding-bottom:4px}
.examples{padding-bottom:105px}.example-layout{display:grid;grid-template-columns:.85fr 1.15fr;gap:80px;align-items:center}.example-controls{display:flex;flex-direction:column;border-top:1px solid var(--line)}.example-button{display:flex;align-items:center;gap:17px;min-height:76px;border:0;border-bottom:1px solid var(--line);background:none;cursor:pointer;text-align:left;font-weight:700;font-size:17px;padding:17px 19px;transition:background .2s,color .2s}.example-button>span{color:var(--muted);font-size:12px;font-weight:400}.example-button>b{margin-left:auto;font-size:22px;font-weight:400}.example-button.active{background:var(--ink);color:#fff;border-color:var(--ink);border-radius:8px}.example-button.active>span,.example-button.active>b{color:var(--lime)}.example-button:not(.active):hover{background:#edf0e5}.revision-note{display:flex;gap:16px;margin-top:34px;align-items:flex-start}.revision-note h3{font-size:16px;margin-bottom:10px}.revision-note p{font-size:14px;max-width:335px;color:var(--muted)}.example-disclaimer{font-size:11px;color:var(--muted);line-height:1.7;margin-top:28px;max-width:380px}.document-stage{position:relative;background:#e9edfb;min-height:660px;border-radius:18px;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:48px 48px 38px;overflow:hidden}.document-stage:before{content:"";position:absolute;height:230px;width:230px;border:1px solid #bfc9ed;border-radius:50%;right:-125px;top:45px;box-shadow:0 0 0 28px #e9edfb,0 0 0 29px #bfc9ed;pointer-events:none}.stage-label{position:relative;font-size:8px;letter-spacing:1.3px;color:#68749f;margin-bottom:26px}.document-sheet{position:relative;background:#fff;padding:31px 33px 22px;width:100%;max-width:435px;min-height:538px;box-shadow:0 12px 22px #23376c18;transform:rotate(1deg);border-radius:2px}.document-sheet article{min-height:450px}.document-sheet h3{font-size:27px;letter-spacing:-1px;line-height:1.1;margin-top:19px}.sheet-subtitle{font-size:10px;color:#5e677a;margin-top:8px;padding-bottom:16px;border-bottom:1px solid #e6e8ef}.sheet-block{display:flex;gap:12px;margin-top:20px}.sheet-number{display:grid;place-items:center;flex-shrink:0;width:22px;height:22px;font-size:9px;border-radius:50%;background:#e8edff;color:var(--blue);font-weight:700}.sheet-block h4{font-size:11px;line-height:1.5;letter-spacing:-.1px;text-wrap:wrap}.sheet-block p{font-size:10px;color:#626b7b;line-height:1.65;margin-top:5px}.sheet-equation{font-family:Georgia,serif;font-size:20px;line-height:1.6;margin-top:9px}.sheet-equation mark{padding:2px 10px;font-size:19px}mark{background:#e9f6c8;color:inherit}.sheet-callout{background:#eef7dc;border-left:2px solid #bed76f;padding:12px 13px;margin-top:20px}.sheet-callout b{font-size:11px}.sheet-callout p{font-size:10px;line-height:1.65;margin-top:5px}.sheet-error{background:#fff0e9;border-color:#ed9d7e}.sheet-small{font-size:9px;color:#747d8b;margin-top:22px}.document-sheet .paper-footer{font-size:6px;margin-top:20px;line-height:1.5}.workflow{background:#edf0e4}.workflow .eyebrow{margin-bottom:18px}.steps-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:40px;margin-top:53px}.steps-grid article{border-left:1px solid #cdd2c2;padding-left:28px;min-width:0}.steps-grid article:first-child{border:0;padding-left:0}.step-number{font-size:49px;font-weight:600;letter-spacing:-3px;color:transparent;-webkit-text-stroke:1px var(--blue);line-height:1;display:block;margin-bottom:22px}.steps-grid h3{font-size:23px;line-height:1.1;letter-spacing:-.7px;margin-bottom:16px}.steps-grid p{font-size:14px;color:#525a55;max-width:320px;min-height:90px}.formats{display:flex;gap:10px;align-items:center;flex-wrap:wrap;margin-top:22px}.formats>span{display:flex;align-items:center;gap:6px;background:var(--paper);padding:12px;border-radius:8px;font-size:10px;border:1px solid #dde0d4}.formats svg{width:19px;height:19px;color:var(--blue)}.formats .format-pdf{background:#fff0eb;color:#d44539;padding:15px;font-weight:700}.prompt-example{position:relative;padding:14px 33px 14px 14px;background:#e1eccb;border-radius:12px;max-width:310px;font-size:11px;line-height:1.55;margin-top:22px}.prompt-example svg{width:16px;height:16px;position:absolute;right:9px;bottom:11px;color:#689336}.result-chip{display:flex;align-items:center;gap:10px;padding:13px;background:#fff;border-radius:10px;margin-top:22px;border:1px solid #e4e7de;max-width:330px}.result-chip b{font-size:10px;overflow-wrap:anywhere}.result-chip small{display:block;font-size:9px;color:#7b8395;margin-top:5px}.result-check{margin-left:auto;color:#58904b}.privacy-note{display:flex;align-items:baseline;gap:12px;font-size:11px;color:#65705f;margin-top:47px;border-top:1px solid #d3d9c9;padding-top:22px}.privacy-note>span{color:var(--blue);font-size:22px}.scenarios{padding-bottom:60px}.scenario-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:42px 74px}.scenario-grid article{border-top:1px solid var(--line);padding-top:23px}.scenario-tag{font-size:9px;letter-spacing:1px;color:var(--blue);display:block;margin-bottom:19px}.scenario-grid h3{font-size:24px;line-height:1.2;letter-spacing:-.6px;margin-bottom:16px;max-width:400px}.scenario-grid p{font-size:14px;line-height:1.75;color:#5e6572;max-width:530px}.scenario-grid .scenario-prompt{font-size:11px;color:#7a808a;margin-top:18px;padding-left:12px;border-left:2px solid #ced9ff}
.faq-layout{display:grid;grid-template-columns:.8fr 1.2fr;gap:60px}.faq-layout .eyebrow{margin-bottom:20px}.faq-aside{font-size:14px;color:var(--muted);margin-top:27px}.faq-list{border-top:1px solid var(--line)}.faq details{border-bottom:1px solid var(--line)}.faq summary{cursor:pointer;list-style:none;display:flex;justify-content:space-between;align-items:center;gap:24px;font-size:15px;font-weight:700;line-height:1.5;min-height:75px;padding-block:20px}.faq summary::-webkit-details-marker{display:none}.faq summary>span{font-size:24px;font-weight:400;color:var(--blue);transition:transform .2s}.faq details[open] summary>span{transform:rotate(45deg)}.faq details p{font-size:14px;line-height:1.75;color:var(--muted);padding-bottom:24px;padding-right:30px;max-width:640px}.closing{padding-bottom:50px}.closing-panel{background:var(--lime);border-radius:20px;display:flex;align-items:center;gap:23px;padding:36px 30px;position:relative}.closing-bracket{font-size:126px;line-height:1;font-weight:300;color:#131820}.closing h2{font-size:clamp(29px,3.3vw,47px);letter-spacing:-1.8px;line-height:1.05}.closing .eyebrow{color:#55612b;font-size:9px;margin-bottom:13px}.closing-action{margin-left:auto;text-align:center;flex-shrink:0}.closing-action>span{display:block;font-size:10px;color:#536029;margin-top:13px}.closing-action .button{font-size:13px;gap:17px;min-height:53px}.underline-blue{position:relative;display:inline-block;white-space:nowrap}.underline-blue:after{content:"";position:absolute;height:4px;background:var(--blue);left:0;right:0;bottom:-7px;transform:rotate(-2deg)}.footer-top{display:flex;align-items:center;gap:20px;padding-block:15px 25px;border-bottom:1px solid var(--line)}.footer .brand{font-size:20px}.footer .brand .bracket{font-size:28px}.footer-top>p{font-size:10px;color:var(--muted)}.footer nav{margin-left:auto;display:flex;gap:27px;font-size:11px}.footer a:hover{text-decoration:underline;text-underline-offset:4px}.footer-bottom{display:flex;justify-content:space-between;align-items:baseline;gap:25px;padding-block:20px 30px;font-size:9px;color:var(--muted)}.footer-bottom p{font-size:9px}
@media(min-width:1600px){.hero-grid{min-height:725px}.hero-visual{transform:scale(1.05);transform-origin:center}.hero-copy{padding-block:65px 85px}.hero h1{font-size:70px}}
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