:root{--bg:#07101f;--panel:#0c1829;--panel2:#111f33;--blue:#2d6be8;--gold:#e7b75e;--white:#f4f5f7;--muted:#9aa8ba;--line:#213148;--green:#46c696}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--white);font-family:'DM Sans',sans-serif;overflow-x:hidden}.noise{position:fixed;inset:0;pointer-events:none;opacity:.03;z-index:30;background-image:url("data:image/svg+xml,%3Csvg viewBox='0 0 180 180' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.5'/%3E%3C/svg%3E")}.site-header{position:absolute;top:0;left:0;right:0;z-index:20;height:92px;display:flex;align-items:center;padding:0 6vw;border-bottom:1px solid #ffffff14}.brand{display:flex;align-items:center;gap:11px;color:#fff;text-decoration:none}.brand-mark{width:42px;height:42px;border:1px solid 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span{margin-top:15px;color:var(--gold)}.proof-strip{height:90px;border-block:1px solid var(--line);display:flex;align-items:center;justify-content:center;gap:5vw;color:#68788d}.proof-strip span{font-size:9px;letter-spacing:2px}.proof-strip b{font:600 14px Manrope;color:#93a0b2}.section{padding:110px 8vw}.intro{display:grid;grid-template-columns:180px 1fr;gap:35px}.intro-copy{display:grid;grid-template-columns:1.3fr 1fr;align-items:end;gap:7vw}.section h2{font-size:clamp(42px,5vw,68px)}.intro-copy p,.section-head>p,.method-copy>p{color:var(--muted);line-height:1.8}.metrics{grid-column:2;display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid var(--line);margin-top:70px;padding-top:40px}.metrics div{border-right:1px solid var(--line);padding-left:25px}.metrics div:first-child{padding-left:0}.metrics div:last-child{border:0}.metrics b{font:500 45px Manrope}.metrics sup{color:var(--gold);font-size:20px}.metrics 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input{width:auto;margin:0}.form-row a{color:var(--gold)}form>small{display:block;text-align:center;color:#617086;margin-top:15px}.checkout-head{background:#0e1d30}.checkout-head>span{font-size:9px;letter-spacing:2px;color:var(--gold)}.checkout-price{display:flex;justify-content:space-between;align-items:center;margin:15px 0 20px}.checkout-price b{font:600 23px Manrope}.pay-tabs{display:flex;margin-bottom:20px}.pay-tabs button{flex:1;padding:12px;background:#101e31;color:#8795a8;border:1px solid #263850;cursor:pointer}.pay-tabs button.active{background:#18335a;color:#fff;border-color:#315a91}.payment-box{padding:18px;background:#101e31;margin-bottom:20px;color:#9ba9bb;font-size:13px;line-height:1.6}.payment-box b{color:#fff}.card-grid{display:grid;grid-template-columns:2fr 1fr;gap:10px}.card-grid input:first-child{grid-column:1/-1}#toast{position:fixed;z-index:100;right:25px;bottom:25px;background:#f5f2e9;color:#111c2a;padding:16px 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/* Student app */.student-app{min-height:100vh;background:#f3f5f8;color:#142033;display:grid;grid-template-columns:250px 1fr}.side{background:#071323;color:#fff;padding:28px 20px;position:fixed;width:250px;inset:0 auto 0 0;display:flex;flex-direction:column}.side .brand{margin:0 10px 38px}.side-nav button{width:100%;background:none;border:0;color:#8494a9;text-align:left;padding:13px 15px;border-radius:5px;cursor:pointer;font:500 13px DM Sans;margin:2px 0}.side-nav button.active,.side-nav button:hover{background:#142943;color:#fff}.side-nav button i{font-style:normal;margin-right:12px}.side-bottom{margin-top:auto;border-top:1px solid #213148;padding-top:20px}.student-main{grid-column:2;padding:0 45px 60px}.student-top{height:82px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid #dfe4ea}.student-top label{background:#e9edf2;padding:10px 15px;color:#778397;font-size:12px}.student-user{display:flex;align-items:center;gap:12px}.student-user span{width:37px;height:37px;background:#17385e;color:#fff;border-radius:50%;display:grid;place-items:center;font-size:11px}.student-header{display:flex;justify-content:space-between;align-items:end;padding:40px 0 28px}.student-header h1{font:700 32px Manrope;letter-spacing:-1px;margin:5px 0}.student-header p{color:#748094}.student-header small{color:#748094}.student-header b{color:#142033}.dash-grid{display:grid;grid-template-columns:2fr 1fr;gap:22px}.continue-card{background:linear-gradient(110deg,#0d2745,#184f87);color:#fff;padding:28px;position:relative;overflow:hidden;min-height:240px}.continue-card:after{content:'Σ';position:absolute;right:30px;top:5px;font:150px Georgia;color:#ffffff0e}.tag{font-size:9px;letter-spacing:1.5px;color:#8fb7e4}.continue-card h2{font:600 27px Manrope;letter-spacing:-1px;margin:15px 0}.continue-card p{color:#a8bfd7}.progress{height:5px;background:#ffffff2b;margin:27px 0 9px}.progress i{display:block;background:var(--gold);height:100%;width:64%}.continue-card small{color:#9eb3ca}.continue-card .btn{float:right;margin-top:-25px;background:#fff;color:#142033}.stats-grid{display:grid;grid-template-columns:1fr 1fr;gap:15px}.stat-card{background:#fff;padding:22px;border:1px solid #e3e7eb}.stat-card span{color:#748094;font-size:11px}.stat-card b{display:block;font:700 28px Manrope;margin-top:12px}.stat-card small{color:#2ca675}.dash-section{margin-top:28px}.dash-title{display:flex;justify-content:space-between;align-items:center}.dash-title h3{font:700 18px Manrope}.dash-title button{background:none;border:0;color:#2769ac;cursor:pointer}.student-modules{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.student-module{background:#fff;border:1px solid #e0e5ea;padding:20px;cursor:pointer}.student-module .num{font-size:10px;color:#2769ac}.student-module h4{margin:12px 0;font:600 15px Manrope}.student-module small{color:#8490a0}.student-module .progress{background:#e8ebef;margin:16px 0 7px}.student-module .progress i{background:#2769ac}.lesson-layout{display:grid;grid-template-columns:1fr 290px;gap:25px}.lesson-content{background:#fff;border:1px solid #e1e5e9;padding:40px}.lesson-content h2{font:700 30px Manrope;letter-spacing:-1px}.lesson-content p{color:#526174;line-height:1.8}.lesson-content .example{background:#f2f6fa;border-left:3px solid #2d6be8;padding:18px 20px;margin:25px 0}.lesson-content .formula{font:28px Georgia;text-align:center;padding:25px;background:#0d2745;color:#fff}.lesson-side{background:#fff;border:1px solid #e1e5e9;padding:20px;height:max-content}.lesson-side h4{margin-top:0}.lesson-side button{display:block;width:100%;padding:12px;border:0;border-bottom:1px solid #e5e9ed;background:none;text-align:left;color:#617084;cursor:pointer}.lesson-side button.current{color:#2465a8;font-weight:600}.quiz-card{max-width:800px;background:#fff;border:1px solid #e0e5ea;padding:35px}.quiz-card .question-meta{color:#2d6be8;font-size:11px;font-weight:700}.quiz-card h2{font:600 22px/1.5 Manrope;letter-spacing:-.5px}.answers button{width:100%;display:flex;gap:13px;text-align:left;padding:15px;margin:9px 0;background:#f7f8fa;border:1px solid #dfe4e9;cursor:pointer}.answers button:hover{border-color:#2d6be8}.answers button.correct{border-color:#34a878;background:#eefaf5}.answers button.wrong{border-color:#d85a61;background:#fff2f2}.feedback{padding:18px;background:#eef7ff;border-left:3px solid #2d6be8;color:#46566a;line-height:1.6;margin-top:20px}.empty-page{background:#fff;padding:50px;text-align:center;border:1px solid #e1e5e9}.empty-page b{font:600 28px Manrope;display:block}.empty-page p{color:#738094}
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