:root{--navy:#061c30;--navy2:#0a2940;--navy3:#10364a;--paper:#f6f5f0;--paper2:#ebece7;--gold:#d5ad68;--teal:#1e7d83;--aqua:#8de0df;--dark:#182e3a;--muted:#69777c;--border:#dfe4e2;--line:#294859;--serif:'Playfair Display',Georgia,serif;--sans:'DM Sans',Arial,sans-serif;--display:'Manrope',Arial,sans-serif}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:95px}body{margin:0;background:var(--paper);font-family:var(--sans);color:var(--dark);-webkit-font-smoothing:antialiased}button,input,select{font:inherit}button{cursor:pointer}a{color:inherit;text-decoration:none}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid #efc275;outline-offset:3px}img{max-width:100%;display:block}.shell{width:min(1180px,calc(100% - 80px));margin:0 auto}.skip-link{position:absolute;top:-100px;left:10px;background:#fff;color:#000;padding:10px 18px;z-index:500}.skip-link:focus{top:10px}.topline{height:32px;display:flex;align-items:center;justify-content:center;gap:10px;background:#e2e8e4;color:#375962;font-family:var(--display);font-size:9px;letter-spacing:2.1px;font-weight:700}.topline strong{color:#1f747d}.topline-star{color:#b28a46;font-size:14px}.topline-sep{color:#889693}.site-header{height:91px;background:#fff;position:sticky;top:0;z-index:60;border-bottom:1px solid #e8eeeb;box-shadow:0 5px 24px rgba(4,21,32,.04)}.nav-inner{height:100%;display:flex;align-items:center;justify-content:space-between;gap:30px}.brand{display:flex;align-items:center;gap:13px;flex-shrink:0}.brand-icon{width:49px;height:49px;display:grid;place-items:center;border:1px solid #e2e8e4;border-radius:50%;background:#0d293f;color:#98d0d3}.brand-icon svg{width:41px;height:41px}.brand-type{display:flex;flex-direction:column;line-height:1;color:var(--navy);position:relative;padding-left:2px}.brand-type .brand-top{font-family:var(--display);letter-spacing:3px;font-weight:800;font-size:8px;margin-bottom:1px}.brand-type strong{font-family:var(--serif);font-size:30px;font-weight:700;letter-spacing:2.2px;line-height:.94}.brand-type .brand-bottom{font-family:var(--display);font-size:8px;letter-spacing:3.1px;color:#187e84;margin-top:5px;font-weight:800}.primary-nav{display:flex;align-items:center;gap:28px}.primary-nav a{color:#3c535a;font-size:12px;font-weight:700;transition:color .2s;white-space:nowrap}.primary-nav a:hover{color:#158487}.primary-nav .nav-cta{background:#0c3142;color:#fff;border-radius:5px;padding:13px 16px;margin-left:2px}.nav-cta span{color:#a6d2c8;margin-left:12px}.mobile-menu{display:none}.hero{position:relative;min-height:604px;background:linear-gradient(123deg,#061828 0%,#062335 54%,#09293e 100%);overflow:hidden;color:#fff}.hero-atlas{position:absolute;right:-5%;top:0;width:68%;height:100%;background-image:linear-gradient(90deg,#061c30 0%,rgba(6,28,48,.42) 44%,rgba(6,28,48,.2) 100%),url('assets/atlas-texture.webp');background-position:center,center;background-size:cover;opacity:.53;mix-blend-mode:screen;mask-image:linear-gradient(90deg,transparent 0%,#000 35%,#000 90%)}.hero:after{content:'';position:absolute;inset:0;background-image:linear-gradient(rgba(98,172,187,.065) 1px,transparent 1px),linear-gradient(90deg,rgba(98,172,187,.065) 1px,transparent 1px);background-size:48px 48px;opacity:.34;pointer-events:none}.hero-stars{position:absolute;inset:0;pointer-events:none;color:#cda963}.hero-stars span{position:absolute;font-size:15px;opacity:.8}.hero-stars span:nth-child(1){top:15%;left:6%}.hero-stars span:nth-child(2){top:22%;right:7%}.hero-stars span:nth-child(3){top:60%;right:49%;font-size:30px}.hero-stars span:nth-child(4){bottom:12%;right:12%}.hero-grid{min-height:604px;display:grid;grid-template-columns:1.03fr .97fr;gap:52px;align-items:center;position:relative;z-index:2;padding:70px 0 76px}.hero-copy{padding-top:5px}.eyebrow{font-family:var(--display);font-size:10px;letter-spacing:2.8px;font-weight:800;color:#137e85;display:flex;gap:12px;align-items:center;margin:0 0 25px}.eyebrow.light{color:#8ed3d6}.eyebrow-rule{display:inline-block;width:29px;height:1px;background:var(--gold)}.tiny-star{color:#b79755;font-size:15px}.hero h1{font-family:var(--serif);font-weight:500;font-size:clamp(48px,4.3vw,69px);letter-spacing:-1.9px;line-height:1.16;margin:0;max-width:680px}.hero h1 em{font-weight:400;color:var(--gold);font-style:italic}.hero-lede{font-size:16px;line-height:1.83;color:#c3d3d9;max-width:510px;margin:24px 0 28px}.hero-actions{display:flex;flex-wrap:wrap;gap:12px}.btn{display:inline-flex;align-items:center;justify-content:center;gap:28px;font-family:var(--display);font-size:11px;letter-spacing:.2px;font-weight:800;padding:16px 19px;min-height:48px;border-radius:4px;border:1px solid transparent;transition:transform .2s,background .2s,border-color .2s;text-align:center}.btn:hover{transform:translateY(-2px)}.btn-gold{background:var(--gold);color:#112d38}.btn-gold:hover{background:#e9c787}.btn-outline{border-color:#5c7984;color:#e9f3f1;background:rgba(255,255,255,.02)}.btn-outline:hover{border-color:#a8dbd7;background:rgba(255,255,255,.09)}.btn-dark{background:#092e40;color:white}.btn-dark:hover{background:#195669}.btn-teal{background:#0d6670;color:#fff}.btn-teal:hover{background:#0b7b82}.hero-note{font-size:11px;color:#9db4bb;margin-top:35px;display:flex;align-items:center;gap:10px;flex-wrap:wrap}.hero-note b{color:#bca16e}.hero-note-icon{font-size:18px;color:#aaccce}.hero-bottom-line{height:3px;background:linear-gradient(90deg,var(--gold),#5ac2c4,var(--gold));position:absolute;bottom:0;left:0;right:0;opacity:.8}.hero-demo{position:relative;background:linear-gradient(143deg,rgba(10,44,62,.96),rgba(6,26,42,.97));border:1px solid rgba(148,209,218,.3);box-shadow:0 16px 60px rgba(0,0,0,.32);border-radius:13px;overflow:hidden;backdrop-filter:blur(5px)}.hero-demo:after{content:'';position:absolute;width:250px;height:250px;border:1px solid rgba(206,167,106,.07);border-radius:50%;top:-180px;right:-90px}.demo-top{display:flex;align-items:start;justify-content:space-between;padding:24px 26px 15px}.demo-label{font-size:9px;font-family:var(--display);letter-spacing:2px;font-weight:800;color:#75b9bf}.demo-top h2{margin:11px 0 0;font-family:var(--serif);font-size:23px;line-height:1.2;font-weight:500;color:#f4f4ed}.demo-orbit{font-size:37px;color:var(--gold);font-family:var(--serif);opacity:.85}.demo-explainer{display:flex;gap:13px;align-items:center;color:#adcad0;font-size:11px;margin:0 26px 12px}.demo-pill{color:#0f2f3a;background:#aed8d2;border-radius:3px;padding:6px 9px;font-weight:800;font-size:9px;letter-spacing:1px}.graph-holder{background:linear-gradient(180deg,rgba(5,19,31,.15),rgba(5,19,31,.4));padding:0 7px}.graph-holder svg{width:100%;height:auto;display:block}.demo-controls{background:rgba(4,15,28,.4);border-top:1px solid rgba(162,207,211,.17);padding:17px 25px 20px}.demo-values{display:grid;grid-template-columns:1fr 1fr;gap:14px}.demo-values>div{display:flex;flex-direction:column;gap:5px}.demo-values span{font-size:9px;letter-spacing:1.3px;font-weight:700;color:#9bb3ba}.demo-values strong{color:#e7d4a6;font-family:var(--display);font-size:20px;letter-spacing:.3px}.range-label{display:flex;justify-content:space-between;margin:18px 0 8px;color:#b2c7c9;font-size:11px}.range-label span{color:#d7b074}.demo-controls input[type=range]{width:100%;height:5px;accent-color:#d8b56f;cursor:pointer}.graph-caption{color:#9ac0bf;font-size:11px;line-height:1.4;margin:13px 0 0}.methods-strip{background:#e9ede9;border-bottom:1px solid #dbe4de}.methods-inner{min-height:73px;display:flex;justify-content:space-between;align-items:center;gap:12px}.methods-inner span{font-family:var(--display);font-size:10px;font-weight:800;letter-spacing:1.25px;color:#3e676c;white-space:nowrap}.methods-inner span b{color:#bb9456;margin-right:10px}.methods-inner i{width:28px;height:1px;background:#b3c5c3;flex-shrink:1}.section{padding:108px 0}.section-intro{display:flex;align-items:end;justify-content:space-between;gap:50px;margin-bottom:39px}.section-intro h2,.philosophy-copy h2,.practice-intro h2,.plan-section h2,.closing-section h2{font-family:var(--serif);font-weight:500;font-size:clamp(39px,4vw,55px);line-height:1.19;letter-spacing:-1.2px;margin:0}.section-intro h2 em,.philosophy-copy h2 em,.practice-intro h2 em,.plan-section h2 em,.closing-section h2 em{font-weight:400;color:#2a8a89}.section-aside{max-width:345px;color:#627477;font-size:14px;line-height:1.85;margin-bottom:5px}.disclosure{color:#939c9b;font-size:11px;line-height:1.5;margin:10px 0 0}.subjects-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:17px}.subject-card{background:#fff;border:1px solid #e2e6e0;text-align:left;min-height:270px;padding:26px 26px 22px;display:flex;flex-direction:column;align-items:flex-start;position:relative;overflow:hidden;transition:transform .24s,border-color .2s,box-shadow .24s;border-radius:5px;color:var(--navy)}.subject-card:hover,.subject-card:focus-visible{transform:translateY(-4px);box-shadow:0 16px 34px rgba(11,34,45,.08);border-color:#9dc6c7}.subject-card:before{content:'';position:absolute;width:190px;height:190px;border:1px solid #e7ecec;border-radius:50%;right:-70px;top:-90px;pointer-events:none}.subject-number{font-size:10px;letter-spacing:2px;color:#718587;font-family:var(--display);font-weight:800}.subject-symbol{font-family:var(--serif);font-size:54px;line-height:1.1;margin:10px 0 15px;color:#0d7b85;letter-spacing:-2px}.symbol-algebra{color:#ad7d42}.symbol-chem{color:#327da0;font-size:45px;margin:17px 0 18px}.symbol-physics{color:#c08e5b;font-size:40px;margin:19px 0 20px}.symbol-stats{color:#397d70}.symbol-organic{color:#5385a2}.subject-name{font-family:var(--serif);font-size:23px;font-weight:600;line-height:1.2;margin-bottom:7px}.subject-detail{font-size:12px;color:#7a898a;line-height:1.6}.subject-bottom{display:flex;justify-content:space-between;align-items:center;width:100%;margin-top:auto;padding-top:24px;font-family:var(--display);font-size:9px;font-weight:800;letter-spacing:1.5px;color:#498289}.circle-arrow{display:grid;place-items:center;width:30px;height:30px;border-radius:50%;background:#e6f1ed;color:#146e76;font-size:15px;transition:background .2s}.subject-card:hover .circle-arrow{background:#d5b170;color:#102b34}.philosophy-section{background:#0a2538;color:white;padding:94px 0;overflow:hidden}.philosophy-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:78px;align-items:center}.philosophy-image{position:relative;border-radius:5px;overflow:hidden;border:1px solid rgba(158,200,199,.18);box-shadow:0 25px 45px rgba(0,0,0,.2)}.philosophy-image img{height:395px;width:100%;object-fit:cover}.philosophy-stamp{position:absolute;bottom:14px;left:18px;color:#b9d8de;letter-spacing:16px;font-family:var(--serif);font-size:17px;background:rgba(1,20,29,.78);padding:8px 8px 8px 22px;border:1px solid #5b8990}.philosophy-stamp span{color:#d4b275}.philosophy-copy h2{font-size:49px}.philosophy-copy h2 em{color:#cfb076}.philosophy-copy>p:not(.eyebrow){color:#b9d0d4;line-height:1.85;font-size:14px;margin:24px 0 22px}.method-points{margin-top:29px;border-top:1px solid #345263}.method-points>div{display:flex;gap:18px;align-items:start;border-bottom:1px solid #345263;padding:17px 0}.method-num{font-size:12px;color:#d8b278;font-family:var(--display);font-weight:800;letter-spacing:1.2px}.method-points strong{font-family:var(--display);font-size:13px;font-weight:800}.method-points p{margin:6px 0 0;color:#a8c0c9;font-size:12px;line-height:1.5}.lesson-section{background:#f5f6f1}.section-intro.compact{margin-bottom:31px}.library-tools{margin-bottom:22px}.search-input{height:57px;display:flex;align-items:center;gap:13px;background:white;border:1px solid #dbe2df;border-radius:4px;padding:0 18px;max-width:650px;color:#6d858b}.search-input input{height:100%;border:0;outline:0;flex:1;min-width:0;background:transparent;font-size:13px;color:#153540}.search-input:focus-within{box-shadow:0 0 0 2px #65b1b2}.search-input input::placeholder{color:#99a5a6}.lesson-tabs{display:flex;flex-wrap:wrap;gap:8px;margin-top:22px}.tab{border:1px solid #d7dedd;border-radius:3px;color:#4e676d;background:#fff;padding:10px 14px;font-size:11px;font-weight:700;transition:background .2s,color .2s}.tab.active{background:#0b3242;color:#fff;border-color:#0b3242}.tab:not(.active):hover{background:#e5eeea}.lesson-list{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}.lesson-card{display:flex;align-items:center;gap:20px;min-height:110px;background:#fff;border:1px solid #e0e6e1;border-radius:4px;padding:21px 21px 19px;transition:border-color .2s,transform .2s;cursor:pointer;color:#0d2b3b;text-align:left}.lesson-card:hover{border-color:#7ebebf;transform:translateY(-2px)}.lesson-index{font-family:var(--serif);font-size:25px;color:#b69b72;align-self:center;min-width:30px}.lesson-info{flex:1;min-width:0}.lesson-tag{font-size:9px;font-family:var(--display);font-weight:800;letter-spacing:1.7px;color:#18818a;text-transform:uppercase}.lesson-info strong{display:block;font-family:var(--serif);font-weight:600;font-size:17px;margin:7px 0;line-height:1.3}.lesson-info small{font-size:11px;color:#839090}.lesson-arrow{width:33px;height:33px;border:1px solid #dbe9e5;border-radius:50%;display:grid;place-items:center;color:#3b8185;flex-shrink:0}.lesson-count{font-size:12px;color:#6b7c7f;margin:21px 0 0}.empty-search{grid-column:1/-1;background:white;padding:25px;border:1px solid #dbe2df;color:#5a7073;font-size:14px}.practice-section{background:#0a293b;padding:112px 0;color:white;position:relative;overflow:hidden}.practice-section:before{content:'∑';font-family:Georgia,serif;font-size:440px;color:rgba(116,203,209,.037);position:absolute;left:-60px;bottom:-200px;line-height:1}.practice-grid{position:relative;display:grid;grid-template-columns:.77fr 1.23fr;gap:100px;align-items:center}.practice-intro h2 em{color:#d5b274}.practice-intro>p:not(.eyebrow){color:#b2cbd0;line-height:1.9;font-size:15px;margin:24px 0}.practice-features{display:flex;flex-direction:column;gap:13px;margin:30px 0}.practice-features span{font-size:13px;color:#bbd9d7}.privacy-note{font-size:11px!important;color:#829fa9!important}.quiz-card{background:#fff;color:var(--navy);border-radius:8px;box-shadow:0 28px 55px rgba(0,0,0,.2);overflow:hidden}.quiz-top{display:flex;justify-content:space-between;gap:15px;align-items:center;font-family:var(--display);font-size:9px;font-weight:800;letter-spacing:1.3px;color:#397e81;padding:27px 28px 21px}.quiz-top span:last-child{color:#86969a;white-space:nowrap}.quiz-progress-bar{height:4px;background:#e6eeeb}.quiz-progress-bar>div{background:#d4ae70;height:100%;width:33.333%;transition:width .25s}.quiz-body{padding:25px 28px}.quiz-instruction{font-family:var(--display);font-size:10px;letter-spacing:1.1px;color:#688487;text-transform:uppercase;font-weight:800;margin:0 0 10px}.quiz-question{font-family:var(--serif);font-size:28px;letter-spacing:-.6px;margin:0 0 8px}.quiz-equation{font-family:Georgia,serif;font-size:28px;text-align:center;background:#f2f6f3;padding:20px 8px;margin:16px 0 22px;border-radius:4px;line-height:1.4}.quiz-options{display:grid;gap:10px}.quiz-option{background:#fff;border:1px solid #dfe6e2;border-radius:4px;padding:14px 15px;display:flex;align-items:center;gap:13px;text-align:left;font-family:Georgia,serif;font-size:17px;color:#173846;line-height:1.5}.quiz-option:hover{border-color:#6ca4a6}.quiz-option:disabled{cursor:default}.quiz-option.selected{border-color:#277f84;background:#e8f3f1}.quiz-option.correct{border-color:#48a48b;background:#e5f4eb}.quiz-option.incorrect{border-color:#c77a6b;background:#faece9}.quiz-letter{font-family:var(--display);font-size:10px;font-weight:800;color:#7d9291;border:1px solid #d6e2dd;border-radius:50%;width:25px;height:25px;display:grid;place-items:center;flex-shrink:0}.quiz-feedback{border-left:3px solid #2e9291;background:#edf5f2;margin-top:17px;padding:13px 15px;font-size:12px;line-height:1.65;color:#31565b}.quiz-feedback.warning{border-left-color:#d39368;background:#fcf3ea}.quiz-feedback strong{display:block;margin-bottom:4px}.quiz-feedback p{margin:0}.quiz-hint{background:#faf6ec;border-left:3px solid #cfac6e;padding:12px 15px;color:#756043;font-size:12px;line-height:1.6;margin-top:14px}.quiz-foot{padding:17px 28px 24px;display:flex;justify-content:space-between;align-items:center;gap:15px}.text-action{border:0;background:transparent;font-size:12px;color:#3e777b;font-weight:800;padding:10px 0}.text-action span{color:#c1a065}.quiz-score{font-family:var(--serif);font-size:26px;line-height:1.4;margin:0 0 12px}.quiz-complete{color:#617575;font-size:14px;line-height:1.7}.plan-section{background:#f6f5f0}.plan-grid{display:grid;grid-template-columns:.9fr 1.1fr;gap:80px;align-items:center}.plan-lede{max-width:465px;font-size:15px;line-height:1.9;color:#667879;margin-top:24px}.plan-mini{display:flex;gap:12px;max-width:390px;padding:16px 0;border-top:1px solid #d8dfd8;margin-top:25px;color:#b18e50;font-size:18px}.plan-mini span{font-size:12px;color:#7b8a89;line-height:1.6}.plan-card{padding:33px;background:white;border:1px solid #dbe5de;border-radius:6px;box-shadow:0 14px 40px rgba(8,37,46,.04)}.plan-form-row{display:grid;grid-template-columns:1.1fr 1fr;gap:14px;margin-bottom:20px}.plan-form-row label{display:block;font-family:var(--display);font-size:9px;letter-spacing:1.3px;font-weight:800;color:#3e6c70}.plan-form-row select{width:100%;display:block;margin-top:10px;padding:13px 11px;background:#f8faf7;border:1px solid #dce4df;border-radius:3px;color:#153742;font-size:13px;min-height:47px}.plan-card .btn{width:100%}.plan-result{margin-top:25px;border-top:1px solid #dbe5df;padding-top:21px}.plan-result h3{font-family:var(--serif);font-size:22px;margin:0 0 15px}.plan-result ol{padding:0;list-style:none;margin:0}.plan-result li{display:flex;gap:14px;padding:12px 0;border-bottom:1px solid #eef1ed}.plan-result .plan-minutes{font-size:11px;min-width:65px;color:#127b84;font-weight:800}.plan-result li strong{display:block;font-size:12px;margin-bottom:4px}.plan-result li span:not(.plan-minutes){font-size:12px;color:#667c80;line-height:1.5}.copy-plan{background:transparent;border:0;color:#167c83;font-size:12px;font-weight:800;padding:15px 0 0}.closing-section{background:#081e30;color:#fff;text-align:center;padding:92px 0 97px;overflow:hidden;position:relative}.closing-inner{position:relative}.closing-inner .eyebrow{justify-content:center}.closing-inner h2{font-size:clamp(42px,4.2vw,58px)}.closing-inner h2 em{color:#d7b478}.closing-inner>p:not(.eyebrow){color:#b6cbd0;line-height:1.8;font-size:14px;max-width:520px;margin:24px auto 26px}.closing-spark{position:absolute;font-family:var(--serif);font-size:185px;color:rgba(137,212,215,.09);top:-50px;line-height:1;pointer-events:none}.closing-spark.left{left:5%}.closing-spark.right{right:5%;top:0}.site-footer{background:#051b2a;color:#b5c8cf;border-top:1px solid #214052}.footer-top{padding:35px 0;display:flex;align-items:center;justify-content:space-between;gap:20px}.footer-brand{display:flex;gap:12px;align-items:center}.footer-brand .small-symbol{color:#d8b57a;font-size:35px}.footer-brand div{display:flex;flex-direction:column;gap:6px}.footer-brand strong{font-family:var(--display);font-size:11px;letter-spacing:1.5px;color:#fff}.footer-brand div span{font-size:11px;color:#8da9b2}.footer-top nav{display:flex;gap:22px;flex-wrap:wrap}.footer-top nav a{font-size:11px;color:#9eb8c1}.footer-top nav a:hover{color:#d4b37a}.footer-bottom{display:flex;justify-content:space-between;gap:20px;padding:16px 0 22px;border-top:1px solid #214052;font-size:10px;color:#7796a2}.lesson-dialog{position:fixed;inset:0;margin:auto;width:min(570px,calc(100% - 30px));border:1px solid #c8d8d6;border-radius:10px;padding:28px 32px 35px;color:var(--navy);background:#fff;box-shadow:0 25px 80px rgba(0,0,0,.25);max-height:90dvh;overflow:auto}.lesson-dialog::backdrop{background:rgba(5,25,39,.75);backdrop-filter:blur(3px)}.modal-head{display:flex;justify-content:space-between;align-items:start}.modal-head .eyebrow{margin:0}.dialog-close{border:0;background:#e8f0ed;color:#163948;font-size:16px;width:32px;height:32px;border-radius:50%;display:grid;place-items:center}.lesson-dialog h3{font-family:var(--serif);font-size:32px;line-height:1.2;margin:16px 0}.lesson-dialog p{font-size:14px;line-height:1.8;color:#65797b}.lesson-dialog h4{font-family:var(--display);font-size:11px;letter-spacing:1px;text-transform:uppercase;margin:25px 0 10px}.lesson-dialog ul{padding-left:20px;color:#536d70;font-size:13px;line-height:1.9}.lesson-dialog .dialog-meta{font-size:11px;color:#347b83;font-weight:700}.lesson-dialog .btn{margin-top:12px}.visually-hidden{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap}
@media(max-width:1100px){.shell{width:min(1040px,calc(100% - 56px))}.primary-nav{gap:15px}.primary-nav a{font-size:11px}.hero-grid{gap:29px}.hero h1{font-size:clamp(40px,4.6vw,61px)}.hero-lede{font-size:14px}.philosophy-grid{gap:45px}.practice-grid{gap:50px}.plan-grid{gap:50px}}
@media(max-width:850px){.site-header{height:78px}.mobile-menu{display:flex;background:transparent;border:0;width:44px;height:44px;flex-direction:column;justify-content:center;align-items:center;gap:6px;margin-left:auto}.mobile-menu span{width:22px;height:2px;background:#163b49;display:block}.primary-nav{display:none;position:absolute;top:77px;left:0;right:0;background:white;padding:20px 28px 25px;flex-direction:column;align-items:stretch;box-shadow:0 15px 28px rgba(0,0,0,.13);gap:6px}.primary-nav.open{display:flex}.primary-nav a{padding:12px 6px;font-size:14px}.primary-nav .nav-cta{margin:5px 0 0;text-align:center}.hero-grid{grid-template-columns:1fr;padding:73px 0 76px}.hero-copy{max-width:670px}.hero h1{font-size:clamp(47px,8vw,66px)}.hero-demo{max-width:650px;width:100%;justify-self:center}.hero-atlas{width:100%;opacity:.3}.subjects-grid{grid-template-columns:repeat(2,1fr)}.methods-inner{flex-wrap:wrap;justify-content:center;padding:15px 0;gap:15px 30px}.methods-inner i{display:none}.philosophy-grid{grid-template-columns:1fr;gap:45px}.philosophy-image img{height:350px}.practice-grid{grid-template-columns:1fr;gap:42px}.practice-intro{max-width:640px}.plan-grid{grid-template-columns:1fr;gap:34px}.section{padding:76px 0}.section-intro{gap:30px}.footer-top{align-items:start;flex-direction:column}}
@media(max-width:590px){html{scroll-padding-top:75px}.shell{width:calc(100% - 38px)}.topline{font-size:8px;letter-spacing:1px;gap:6px}.site-header{height:70px}.primary-nav{top:69px}.brand-icon{width:42px;height:42px}.brand-icon svg{width:35px;height:35px}.brand-type strong{font-size:25px}.brand-type .brand-bottom{font-size:7px;letter-spacing:2.4px}.hero-grid{padding:56px 0 52px;gap:40px}.hero h1{font-size:clamp(40px,11vw,52px);line-height:1.17;letter-spacing:-1px}.eyebrow{font-size:9px;letter-spacing:1.5px;margin-bottom:20px}.hero-lede{font-size:14px;margin:20px 0 22px}.hero-actions{flex-direction:column;align-items:stretch}.hero-actions .btn{width:100%;justify-content:space-between}.hero-note{margin-top:22px;line-height:1.4}.demo-top{padding:18px 19px 10px}.demo-top h2{font-size:21px}.demo-explainer{margin:0 18px 4px;flex-wrap:wrap;font-size:11px}.demo-controls{padding:15px 18px 18px}.graph-caption{min-height:31px}.demo-values strong{font-size:17px}.demo-values span{font-size:8px}.methods-inner{gap:11px 21px}.methods-inner span{font-size:8px;letter-spacing:.6px}.methods-inner span b{margin-right:4px}.section{padding:67px 0}.section-intro{display:block;margin-bottom:30px}.section-intro h2,.philosophy-copy h2,.practice-intro h2,.plan-section h2{font-size:42px}.section-aside{margin-top:24px;max-width:100%;font-size:13px}.subjects-grid{grid-template-columns:1fr;gap:12px}.subject-card{min-height:206px;padding:21px}.subject-symbol{font-size:44px;margin:4px 0 10px}.symbol-chem,.symbol-physics{font-size:34px;margin:9px 0 14px}.subject-bottom{padding-top:12px}.philosophy-section{padding:66px 0}.philosophy-image img{height:240px}.philosophy-grid{gap:35px}.philosophy-copy h2{font-size:40px}.lesson-tabs{gap:7px}.tab{font-size:10px;padding:8px 10px}.lesson-list{grid-template-columns:1fr}.lesson-card{padding:16px;min-height:93px}.lesson-info strong{font-size:16px}.practice-section{padding:70px 0}.practice-grid{gap:30px}.quiz-top{padding:17px 17px 14px;font-size:8px;letter-spacing:.4px}.quiz-body{padding:18px}.quiz-question{font-size:24px}.quiz-equation{font-size:22px}.quiz-option{font-size:15px}.quiz-foot{padding:14px 18px 21px}.quiz-foot .btn{padding:13px 14px;gap:13px}.plan-form-row{grid-template-columns:1fr}.plan-card{padding:22px}.closing-section{padding:75px 0}.closing-inner h2{font-size:42px}.closing-spark{font-size:90px}.footer-top nav{gap:15px}.footer-bottom{display:flex;flex-direction:column;gap:8px}.lesson-dialog{padding:22px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{transition-duration:.01ms!important;animation-duration:.01ms!important}}