:root{--navy:#102a5e;--blue:#279df0;--yellow:#ffd43b;--coral:#ff6f4d;--purple:#9a5cf6;--mint:#55d6ae;--cream:#fffaf0;--ink:#132755;--muted:#64748b;--surface:#fff;--radius:28px;--shadow:0 18px 55px #183a721f}*{box-sizing:border-box}html{scroll-behavior:smooth}body{background:var(--cream);color:var(--ink);margin:0;font-family:Nunito,Avenir Next,ui-rounded,system-ui,-apple-system,sans-serif}a{color:inherit;text-decoration:none}button,a{touch-action:manipulation}button:focus-visible,a:focus-visible{outline-offset:4px;outline:4px solid #279df055}.site-header{z-index:20;background:#fffaf0e8;justify-content:space-between;align-items:center;gap:24px;max-width:1240px;height:76px;margin:auto;padding:0 24px;display:flex;position:relative}.logo{letter-spacing:-2.5px;color:var(--navy);font-size:34px;font-weight:950;line-height:1;position:relative}.logo span{font-size:38px}.logo i{color:#ffb720;letter-spacing:2px;font-size:10px;font-style:normal;position:absolute;top:-4px;left:43%}.site-header nav{align-items:center;gap:25px;font-size:14px;font-weight:750;display:flex}.site-header nav>a:hover{color:var(--blue)}.student-link{color:var(--navy);border-left:1px solid #dce6f2;padding-left:24px}.nav-cta,.primary-button{background:var(--yellow);border-radius:999px;justify-content:center;align-items:center;gap:10px;min-height:48px;padding:0 23px;font-weight:900;transition:transform .2s;display:inline-flex;box-shadow:0 7px #e5b91c;color:var(--navy)!important}.nav-cta:hover,.primary-button:hover{transform:translateY(-2px)}.hero{background:#edf7ff;border-radius:0 0 44px 44px;max-width:1500px;min-height:650px;margin:0 auto;position:relative;overflow:hidden}.hero-art{object-fit:cover;object-position:center}.hero:after{content:"";background:linear-gradient(90deg,#fffaf0fa 0%,#fffaf0eb 29%,#fffaf03d 55%,#0000 72%);position:absolute;inset:0}.hero-content{z-index:2;max-width:620px;padding:105px 20px 105px max(34px,50vw - 620px);position:relative}.hero-note,.eyebrow{color:#347baa;letter-spacing:1.4px;align-items:center;gap:8px;font-size:12px;font-weight:900;display:inline-flex}.hero h1{letter-spacing:-4px;color:var(--navy);margin:22px 0;font-size:clamp(48px,6vw,78px);font-weight:950;line-height:.98}.hero h1 em{color:#227fc3;font-style:normal}.hero-content>p{color:#3f5677;max-width:510px;font-size:18px;font-weight:600;line-height:1.65}.hero-actions{align-items:center;gap:12px;margin-top:28px;display:flex}.secondary-button{background:#fff;border:1px solid #dbe7f6;border-radius:999px;min-height:48px;padding:13px 22px;font-weight:850;box-shadow:0 7px 24px #1b558412}.trust-row{color:#526683;flex-wrap:wrap;gap:22px;margin-top:35px;font-size:12px;font-weight:800;display:flex}.trust-row span{align-items:center;gap:7px;display:flex}.trust-row svg{color:#e25176;background:#fff;border-radius:7px;width:20px;height:20px;padding:3px}.trust-row span:nth-child(2) svg{color:#199769}.trust-row span:nth-child(3) svg{color:#d69400}.section{max-width:1200px;margin:0 auto;padding:100px 26px}.section-copy{max-width:500px}.section-copy h2{letter-spacing:-2.5px;margin:15px 0;font-size:clamp(38px,5vw,58px);line-height:1.04}.section-copy h2 span{color:#2694dc}.section-copy p{color:var(--muted);font-size:17px;font-weight:600;line-height:1.7}.worlds{grid-template-columns:.85fr 1.15fr;align-items:center;gap:70px;display:grid}.world-demo{box-shadow:var(--shadow);background:#eaf6ff;border:1px solid #cfe9fb;border-radius:34px;padding:16px}.world-tabs{gap:6px;padding:2px 2px 13px;display:flex;overflow:auto}.world-tabs button{color:#61718b;min-width:86px;min-height:67px;font:inherit;cursor:pointer;background:0 0;border:0;border-radius:18px;padding:8px;font-size:11px;font-weight:850}.world-tabs button span{margin-bottom:4px;font-size:24px;display:block}.world-tabs button[aria-selected=true]{color:var(--navy);background:#fff;box-shadow:0 7px 22px #163d6e14}.math-card{background:#fff;border-radius:25px;min-height:300px;padding:28px;position:relative;overflow:hidden}.math-card:after{content:"?";color:#edf6fb;font-size:200px;font-weight:950;position:absolute;bottom:-45px;right:20px}.math-badge{z-index:1;background:#f0f8ff;border-radius:999px;align-items:center;gap:8px;padding:8px 13px;font-size:12px;font-weight:900;display:inline-flex;position:relative}.math-card>strong{letter-spacing:1px;z-index:1;margin:26px 0 13px;font-size:43px;display:block;position:relative}.math-card>p{z-index:1;max-width:470px;font-size:18px;font-weight:750;line-height:1.55;position:relative}.answer-row{z-index:1;color:#6e7e91;border-top:1px dashed #d8e4ed;justify-content:space-between;align-items:center;margin-top:25px;padding-top:17px;font-size:12px;font-weight:850;display:flex;position:relative}.answer-row b{color:#16a36c;font-size:24px}.how{padding-top:65px}.how>.section-copy{max-width:700px}.steps{grid-template-columns:repeat(3,1fr);gap:18px;margin-top:45px;display:grid}.steps article{background:#fff;border:1px solid #edf0f3;border-radius:27px;padding:28px;position:relative;box-shadow:0 12px 35px #1538660b}.steps article>span{color:#cbd7e5;font-size:12px;font-weight:950;position:absolute;top:18px;right:20px}.steps svg{color:#147bc2;background:#e9f6ff;border-radius:15px;width:44px;height:44px;padding:10px}.steps article:nth-child(2) svg{color:#8a4ce0;background:#f3ecff}.steps article:nth-child(3) svg{color:#db9900;background:#fff7da}.steps h3{margin:23px 0 8px;font-size:19px}.steps p{color:var(--muted);font-size:14px;line-height:1.55}.safety{background:#eefbf6;border-radius:36px;align-items:center;gap:30px;margin-bottom:90px;padding:55px;display:flex}.safety>svg{color:#19a574;width:100px;height:100px;box-shadow:var(--shadow);background:#fff;border-radius:30px;flex-shrink:0;padding:23px}.safety h2{letter-spacing:-1px;margin:10px 0;font-size:32px}.safety p{color:#55736a;max-width:750px;line-height:1.65}.final-cta{text-align:center;background:var(--navy);color:#fff;padding:85px 24px;position:relative;overflow:hidden}.final-cta>span{color:var(--yellow);font-size:38px}.final-cta h2{max-width:750px;margin:15px auto;font-size:clamp(34px,5vw,54px)}.final-cta p{color:#bdd0e5;margin-bottom:28px}footer{justify-content:space-between;align-items:center;gap:20px;max-width:1200px;min-height:120px;margin:auto;padding:30px 24px;display:flex}footer p,footer small{color:#76859a;font-size:13px;font-weight:700}@media (max-width:800px){.site-header{height:66px}.site-header nav>a:not(.student-link):not(.nav-cta){display:none}.site-header nav{gap:10px}.student-link{border:0;padding-left:0}.nav-cta{min-height:42px;padding:0 15px}.hero{border-radius:0 0 30px 30px;min-height:760px}.hero-art{object-position:68% bottom}.hero:after{background:linear-gradient(#fffaf0 2%,#fffaf0e8 38%,#0000 66%)}.hero-content{text-align:center;margin:auto;padding:55px 24px 0}.hero h1{letter-spacing:-2.8px;font-size:48px}.hero-content>p{font-size:16px}.hero-actions,.trust-row{justify-content:center}.worlds{grid-template-columns:1fr;gap:30px}.section{padding:70px 20px}.steps{grid-template-columns:1fr}.safety{flex-direction:column;align-items:flex-start;margin:0 15px 65px;padding:30px}.safety>svg{width:70px;height:70px;padding:16px}.safety h2{font-size:27px}footer{text-align:center;flex-direction:column}}@media (max-width:480px){.logo{font-size:29px}.logo span{font-size:32px}.site-header{padding:0 14px}.site-header nav .student-link,.nav-cta{font-size:12px}.hero{min-height:720px}.hero h1{font-size:41px}.hero-actions{flex-direction:column}.hero-actions a{width:100%}.trust-row{gap:10px;font-size:10px}.world-tabs button{min-width:74px}.math-card{padding:22px}.math-card>p{font-size:16px}.section-copy h2{font-size:39px}.safety{border-radius:26px}}@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}.nav-cta,.primary-button{transition:none}}
.portal-shell{background:radial-gradient(circle at 12% 8%,#fff3b6 0,#0000 30%),radial-gradient(circle at 88% 82%,#cef 0,#0000 31%),#f7fbff;place-items:center;min-height:100vh;padding:28px;display:grid}.portal-card{text-align:center;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);background:#ffffffeb;border:1px solid #dce8f5;border-radius:34px;width:min(100%,560px);padding:46px;box-shadow:0 24px 70px #14336d1a}.portal-card-wide{width:min(100%,620px)}.onboarding-card{width:min(100%,780px)}.portal-card .logo{margin-bottom:28px;display:inline-flex}.portal-card .eyebrow{display:block}.portal-card h1{letter-spacing:-2px;color:var(--navy);margin:12px 0 14px;font-size:clamp(34px,6vw,52px);line-height:1.03}.portal-card>p{max-width:560px;color:var(--muted);margin:0 auto 28px;line-height:1.65}.portal-form{text-align:left;gap:16px;display:grid}.portal-form label,.portal-form legend{color:var(--navy);gap:7px;font-size:14px;font-weight:900;display:grid}.portal-form input,.portal-form select{width:100%;min-height:50px;color:var(--ink);font:inherit;background:#fff;border:1px solid #cddded;border-radius:14px;outline:none;padding:0 15px;font-size:16px}.portal-form input:focus,.portal-form select:focus{border-color:var(--blue);box-shadow:0 0 0 4px #279df01c}.portal-form small,.duration-control small{color:#718198;font-size:12px;font-weight:650}.portal-submit{cursor:pointer;border:0;width:100%;margin-top:4px}.portal-submit:disabled,.primary-button:disabled{cursor:wait;opacity:.65}.form-error{background:#fff0f0;border-radius:12px;padding:11px 14px;font-size:13px;color:#a42828!important;margin:0!important;line-height:1.4!important}.portal-foot{font-size:14px;margin:24px 0 12px!important}.portal-foot a,.portal-back{color:#197abd;font-weight:850}.portal-back{min-height:44px;margin-top:2px;padding:12px;display:inline-block}.portal-success,.verification-box{background:#effcf7;border:1px solid #bde9da;border-radius:22px;padding:25px}.portal-success strong,.verification-box strong{font-size:20px}.portal-success p,.verification-box p{margin:8px auto 18px!important}.form-grid{grid-template-columns:1fr 1fr;gap:14px;display:grid}.portal-form fieldset{border:0;margin:4px 0;padding:0}.interest-grid{grid-template-columns:repeat(4,1fr);gap:8px;margin-top:8px;display:grid}.interest-grid label{display:block}.interest-grid input{opacity:0;width:1px;height:1px;position:absolute}.interest-grid span{color:#526683;cursor:pointer;background:#fff;border:1px solid #d6e3ef;border-radius:12px;place-items:center;min-height:44px;font-size:12px;display:grid}.interest-grid input:checked+span{color:#126eac;background:#eaf7ff;border-color:#279df0}.interest-grid input:focus-visible+span{outline:3px solid #279df055}.inline-actions{flex-wrap:wrap;justify-content:center;align-items:center;gap:14px;display:flex}.text-button{color:#176fae;min-height:44px;font:inherit;cursor:pointer;background:0 0;border:0;font-weight:850}.student-portal{background:radial-gradient(circle at 15% 15%,#d6f8ed 0,#0000 31%),radial-gradient(circle at 90% 78%,#ead8ff 0,#0000 32%),#f7fbff}.dashboard-shell,.student-home{background:#f4f9ff;min-height:100vh}.dashboard-header{background:#fff;border-bottom:1px solid #e3edf7;justify-content:space-between;align-items:center;gap:20px;height:86px;padding:8px max(20px,50vw - 590px);display:flex}.dashboard-header>div{color:#5d6e87;align-items:center;gap:16px;font-size:13px;font-weight:800;display:flex}.dashboard-content{max-width:1180px;margin:auto;padding:58px 22px 90px}.dashboard-welcome{max-width:720px}.dashboard-welcome h1,.student-hero h1{letter-spacing:-2px;margin:13px 0;font-size:clamp(36px,5vw,58px);line-height:1.03}.dashboard-welcome p{color:var(--muted);font-size:17px;line-height:1.6}.dashboard-grid{grid-template-columns:repeat(3,1fr);gap:18px;margin-top:35px;display:grid}.dashboard-card{background:#fff;border:1px solid #e0eaf4;border-radius:26px;padding:27px;box-shadow:0 12px 32px #14336d0b}.dashboard-card h2{margin:14px 0 8px;font-size:21px}.dashboard-card p{color:var(--muted);line-height:1.55}.card-icon{font-size:30px}.soft-card{background:#edf8ff}.duration-control{gap:10px;display:grid}.duration-control label{font-weight:850}.duration-control select{min-height:48px;font:inherit;background:#fff;border:1px solid #cddded;border-radius:13px;padding:0 12px}.dashboard-card dl{gap:8px;display:grid}.dashboard-card dl div{justify-content:space-between;gap:12px;display:flex}.dashboard-card dt{color:var(--muted)}.dashboard-card dd{margin:0;font-weight:900}.student-hero{text-align:center;max-width:760px;box-shadow:var(--shadow);background:#fff;border-radius:36px;margin:70px auto;padding:50px}.student-hero>p{color:var(--muted);font-size:19px}.student-stats{grid-template-columns:repeat(3,1fr);gap:12px;margin:32px 0;display:grid}.student-stats article{background:#eef8ff;border-radius:20px;padding:18px}.student-stats strong{color:#148bd6;font-size:30px;display:block}.student-stats span{color:#64748b;font-size:12px}.student-hero>small{color:#718198;margin-top:18px;display:block}@media (max-width:800px){.dashboard-grid{grid-template-columns:1fr}.dashboard-content{padding-top:38px}.student-hero{margin:28px 16px;padding:34px 22px}.dashboard-header{height:auto;min-height:82px;padding:9px 16px}.dashboard-header .brand-logo{width:180px;height:54px}.dashboard-header .brand-logo img{width:250px;transform:translate(-33px,-16px)}}@media (max-width:600px){.portal-shell{padding:18px}.portal-card{border-radius:28px;padding:34px 24px}.form-grid{grid-template-columns:1fr}.interest-grid{grid-template-columns:repeat(2,1fr)}.student-stats{gap:7px}.student-stats article{padding:14px 7px}}.practice-shell{background:radial-gradient(circle at 20% 0,#d9f3ff 0,#0000 35%),radial-gradient(circle at 90% 90%,#fff1aa 0,#0000 33%),#f7fbff;min-height:100vh}.practice-intro,.practice-complete{text-align:center;width:min(700px,100% - 32px);box-shadow:var(--shadow);background:#fff;border:1px solid #deebf5;border-radius:36px;margin:70px auto;padding:55px}.practice-orbit,.practice-complete>span{color:var(--yellow);font-size:52px;display:block}.practice-intro h1,.practice-complete h1{margin:15px 0;font-size:clamp(38px,6vw,62px);line-height:1}.practice-intro>p,.practice-complete>p{color:var(--muted);font-size:17px;line-height:1.65}.practice-intro .primary-button{cursor:pointer;border:0;margin:15px auto}.practice-intro .portal-back{display:block}.question-stage{width:min(760px,100% - 32px);margin:40px auto 80px}.question-top{color:#536882;grid-template-columns:1fr auto 1fr;align-items:center;gap:15px;font-weight:850;display:grid}.question-top strong{color:var(--navy);font-size:20px}.question-top button{justify-self:end}.question-progress{background:#dceaf4;border-radius:999px;height:10px;margin:13px 0 20px;overflow:hidden}.question-progress span{border-radius:inherit;background:linear-gradient(90deg,var(--blue),var(--mint));height:100%;transition:width .25s;display:block}.question-card{text-align:center;box-shadow:var(--shadow);background:#fff;border:1px solid #deebf5;border-radius:34px;padding:48px}.question-card h1{place-items:center;min-height:120px;margin:14px 0 25px;font-size:clamp(30px,5vw,47px);line-height:1.18;display:grid}.answer-grid{grid-template-columns:1fr 1fr;gap:13px;display:grid}.answer-grid button{min-height:76px;color:var(--navy);font:inherit;cursor:pointer;background:#fafdff;border:2px solid #dbe8f4;border-radius:19px;font-size:26px;font-weight:950;transition:all .15s}.answer-grid button:hover{border-color:var(--blue);transform:translateY(-2px)}.answer-grid button:disabled{cursor:default}.answer-grid .correct-choice{color:#08744b;background:#e9fff5;border-color:#23b87a}.hint-box{color:#7e6511;background:#fff8d6;border-radius:14px;padding:12px}.hint-button{margin-top:15px}.answer-feedback{border-radius:18px;gap:10px;margin-top:20px;padding:18px;display:grid}.answer-feedback.correct{color:#08744b;background:#e9fff5}.answer-feedback.wrong{color:#805c00;background:#fff5dc}.answer-feedback small{color:inherit}.answer-feedback .primary-button{cursor:pointer;border:0;margin:auto}.earned-list{gap:10px;margin:20px auto 28px;display:grid}.earned-list>div{background:#fff8d9;border-radius:15px;justify-content:center;align-items:center;gap:10px;padding:12px;display:flex}.earned-list span{font-size:28px}@media (max-width:600px){.practice-intro,.practice-complete{margin:25px auto;padding:36px 22px}.question-stage{margin-top:22px}.question-card{padding:32px 18px}.question-card h1{min-height:105px;font-size:30px}.answer-grid button{min-height:68px}.question-top{grid-template-columns:1fr auto auto}}.week-calendar{border-top:1px solid #e6edf4;grid-template-columns:repeat(7,1fr);gap:5px;margin:20px 0 12px;padding-top:16px;display:grid}.week-calendar div{text-align:center;gap:5px;display:grid}.week-calendar span{color:#76859a;text-transform:capitalize;font-size:10px;font-weight:800}.week-calendar b{aspect-ratio:1;color:#fff;background:#edf2f7;border-radius:50%;place-items:center;font-size:13px;display:grid}.week-calendar b:not(:empty){background:#20b978}.progress-card>small{color:#718198}.pin-reset{border-top:1px solid #e6edf4;margin-top:15px;padding-top:12px}.pin-reset summary{color:#197abd;cursor:pointer;align-items:center;min-height:44px;font-size:13px;font-weight:850;display:flex}.pin-reset form{gap:7px;display:flex}.pin-reset input{min-width:0;min-height:42px;font:inherit;border:1px solid #cddded;border-radius:10px;padding:0 10px}.pin-reset button{background:var(--navy);color:#fff;border:0;border-radius:10px;min-height:42px;font-weight:850}.pin-reset small{margin-top:7px;display:block}.form-info{background:#eaf8ff;border-radius:12px;padding:11px 14px;font-size:13px;color:#12689f!important;margin:0!important;line-height:1.4!important}.visual-math{justify-content:center;align-items:center;gap:20px;min-height:110px;margin:-8px auto 24px;display:flex}.object-group{background:#eef8ff;border-radius:20px;flex-wrap:wrap;justify-content:center;gap:9px;max-width:220px;padding:16px;display:flex}.object-group span{color:var(--blue);font-size:30px;line-height:1}.object-group .removed-object{color:#bdc9d6;-webkit-text-decoration:line-through #ef6f61;text-decoration:line-through #ef6f61;text-decoration-thickness:4px}.vertical-math{text-align:right;font-variant-numeric:tabular-nums;justify-content:center;gap:5px;width:190px;margin:-12px auto 24px;font-size:36px;font-weight:950;display:grid}.vertical-math i{background:var(--navy);height:3px}.permission-list{grid-template-columns:repeat(2,1fr);gap:8px;display:grid}.permission-list label{border:1px solid #d6e3ef;border-radius:12px;align-items:center;gap:10px;min-height:44px;padding:9px 12px;display:flex}.permission-list input{width:20px;height:20px;min-height:20px}.permission-list span{font-size:13px}@media (max-width:600px){.permission-list{grid-template-columns:1fr}}.learning-insights{gap:8px;margin-top:16px;display:grid}.learning-insights section{background:#f5f9ff;border-radius:14px;padding:12px}.learning-insights strong{font-size:13px}.learning-insights p{margin:5px 0;font-size:12px}.learning-insights small{line-height:1.45;display:block}.personalization-settings{border-top:1px solid #e6edf4;margin-top:15px;padding-top:12px}.personalization-settings summary{color:#197abd;cursor:pointer;align-items:center;min-height:44px;font-size:13px;font-weight:850;display:flex}.personalization-settings form{gap:9px;display:grid}.personalization-settings label{gap:4px;font-size:11px;font-weight:800;display:grid}.personalization-settings input{min-width:0;min-height:42px;font:inherit;border:1px solid #cddded;border-radius:10px;padding:0 10px}.personalization-settings button{background:var(--navy);color:#fff;border:0;border-radius:12px;min-height:44px;font-weight:850}.personalization-settings>.permission-list{grid-template-columns:1fr 1fr}.vertical-work{justify-items:center;gap:16px;display:grid}.work-row,.digit-row{flex-wrap:wrap;justify-content:center;gap:8px;display:flex}.work-row{background:#fff8d6;border-radius:14px;padding:12px}.work-row label,.digit-row label{justify-items:center;gap:4px;display:grid}.work-row span,.digit-row span{color:#65758b;font-size:10px}.work-row input,.digit-row input{text-align:center;width:48px;height:52px;font:inherit;border:2px solid #cbdcea;border-radius:12px;font-size:25px;font-weight:950}.vertical-work>.primary-button{cursor:pointer;border:0}.audio-button{color:#176fae;min-height:44px;font:inherit;cursor:pointer;background:#eef9ff;border:1px solid #cfe7f7;border-radius:999px;margin:-14px auto 18px;padding:8px 15px;font-weight:850}.audio-preference{cursor:pointer;background:#f7fbff;border:1px solid #d9e8f4;border-radius:14px;align-items:flex-start;gap:10px;margin-top:8px;padding:13px;display:flex!important}.audio-preference input{width:20px;height:20px;accent-color:var(--blue);margin-top:2px}.audio-preference span{gap:4px;display:grid}.audio-preference strong{color:var(--navy);font-size:14px}.audio-preference small{line-height:1.45}.visual-math{flex-wrap:wrap}.visual-object{width:42px;height:42px;display:block}.object-group span{display:block;position:relative}.object-group .removed-object{opacity:.42;filter:grayscale(.7)}.object-group .removed-object:after{content:"";background:#ef6f61;border-radius:99px;height:4px;position:absolute;top:50%;left:1px;right:1px;transform:rotate(-35deg)}.theme-counter .object-group{grid-template-columns:repeat(5,34px);align-content:center;display:grid}.theme-counter .visual-object{width:34px;height:34px}.visual-math.is-guided .object-group:first-child span{animation:.65s both guided-count}.visual-math.is-guided .object-group:first-child span:nth-child(2){animation-delay:.12s}.visual-math.is-guided .object-group:first-child span:nth-child(3){animation-delay:.24s}.lesson-object-group i,.lesson-equal-groups i{display:block}.lesson-object-group .visual-object{width:46px;height:46px}.lesson-equal-groups .visual-object{width:25px;height:25px}@keyframes guided-count{50%{filter:drop-shadow(0 5px 7px #279df066);transform:scale(1.18)}}@media (max-width:600px){.visual-object{width:36px;height:36px}.theme-counter .object-group{grid-template-columns:repeat(5,30px)}.theme-counter .visual-object{width:30px;height:30px}}@media (prefers-reduced-motion:reduce){.visual-math.is-guided .object-group:first-child span{animation:none}}.topic-links{flex-wrap:wrap;justify-content:center;align-items:center;gap:8px;margin:24px 0;display:flex}.topic-links strong{width:100%;font-size:13px}.topic-links a{color:#1674ae;background:#eef8ff;border-radius:12px;min-height:44px;padding:12px 14px;font-weight:850}.micro-lesson{width:min(700px,100% - 32px);box-shadow:var(--shadow);text-align:center;background:#fff;border:1px solid #deebf5;border-radius:34px;margin:55px auto;padding:48px}.micro-lesson h1{font-size:clamp(30px,5vw,48px)}.micro-lesson ol{text-align:left;gap:10px;max-width:480px;margin:28px auto;line-height:1.5;display:grid}.lesson-example{background:#eef8ff;border-radius:18px;padding:20px;font-size:27px;display:block}.lesson-visual{background:linear-gradient(145deg,#f4fbff,#fffdf2);border:1px solid #d8eaf7;border-radius:24px;width:min(100%,440px);min-height:140px;margin:22px auto 8px;padding:22px}.lesson-object-groups{justify-content:center;align-items:center;gap:18px;display:flex}.lesson-object-groups>b{font-size:35px}.lesson-object-group{flex-wrap:wrap;justify-content:center;gap:7px;max-width:145px;display:flex}.lesson-object-group i{color:var(--blue);font-size:32px;font-style:normal;animation:.45s both lesson-pop}.lesson-object-group i:nth-child(2){animation-delay:.12s}.lesson-object-group i:nth-child(3){animation-delay:.24s}.lesson-object-group.removed i{color:#b9c4d3;-webkit-text-decoration:line-through #ef6f61;text-decoration:line-through #ef6f61;text-decoration-thickness:4px}.lesson-place-value{font-variant-numeric:tabular-nums;gap:6px;max-width:290px;display:grid}.place-value-head,.place-value-row{grid-template-columns:1fr 1fr;align-items:center;display:grid}.place-value-head{color:#65758b;font-size:12px;font-weight:850}.place-value-row{font-size:36px;position:relative}.place-value-row.operator i{font-style:normal}.place-value-rule{background:var(--navy);border-radius:99px;height:3px}.place-value-row.result{animation:.55s .4s both lesson-result}.lesson-equal-groups{grid-template-columns:repeat(2,1fr);gap:12px;display:grid}.lesson-equal-groups>span{background:#effcf7;border:2px solid #8bd9c0;border-radius:16px;grid-template-columns:repeat(3,1fr);gap:5px;padding:10px;display:grid}.lesson-equal-groups i{color:#20a87b;font-size:18px;font-style:normal;animation:.4s both lesson-pop}.lesson-number-line{justify-content:center;align-items:center;gap:8px;display:flex}.lesson-number-line i{background:var(--blue);width:90px;height:4px;position:relative}.lesson-number-line i:after{content:"";border:7px solid #0000;border-left-color:var(--blue);position:absolute;top:-5px;right:-1px}@keyframes lesson-pop{0%{opacity:.25;transform:scale(.65)}to{opacity:1;transform:scale(1)}}@keyframes lesson-result{0%{opacity:0;transform:translateY(-6px)}to{opacity:1;transform:translateY(0)}}@media (max-width:600px){.micro-lesson{margin:24px auto;padding:32px 18px}.lesson-visual{padding:16px}.lesson-example{font-size:23px}}@media (prefers-reduced-motion:reduce){.lesson-object-group i,.lesson-equal-groups i,.place-value-row.result{animation:none}}.place-value-row.operator{grid-template-columns:1fr 1fr}.place-value-row.operator i{font-style:normal;position:absolute;top:50%;right:calc(100% + 10px);transform:translateY(-50%)}
@media (max-width:600px){html,body{max-width:100%;overflow-x:hidden}.site-header{gap:8px;padding-inline:12px}.site-header nav{gap:8px}.logo{flex:none;font-size:28px}.logo span{font-size:31px}.site-header nav .student-link{white-space:nowrap;padding:0;font-size:11px}.nav-cta{white-space:nowrap;min-height:38px;padding-inline:11px;font-size:11px;box-shadow:0 5px #e5b91c}.hero{min-height:746px}.hero-content{width:100%;padding:48px 20px 0}.hero-note{font-size:10px}.hero h1{letter-spacing:-2.2px;font-size:clamp(38px,11vw,45px)}.hero-content>p{font-size:15px;line-height:1.55}.hero-actions{flex-direction:column}.hero-actions a{width:min(100%,300px)}.trust-row{background:#ffffffe6;border:1px solid #fffa;border-radius:18px;gap:8px 12px;width:min(100%,330px);margin-inline:auto;padding:10px 12px;box-shadow:0 10px 28px #1736651f}.world-demo{width:100%}.worlds>*{width:100%;min-width:0}.section-copy h2{overflow-wrap:anywhere}}
.profile-chips{flex-wrap:wrap;gap:8px;margin-top:22px;display:flex}.profile-chips span{color:#365271;background:#fff;border:1px solid #dce9f5;border-radius:999px;padding:8px 11px;font-size:12px;font-weight:850;box-shadow:0 5px 16px #173b6810}.section-copy .privacy-note{color:#708197;margin-top:14px;font-size:11px;line-height:1.5}.math-card .answer-row span{max-width:75%}@media (max-width:600px){.profile-chips{justify-content:center}.section-copy .privacy-note{text-align:center}.math-card .answer-row span{max-width:68%}}
:root{--navy:#102f68;--blue:#0ea5ff;--yellow:#ffd23f;--mint:#00d4a8;--cream:#f8fbff;--ink:#102f68}.brand-logo{flex:none;width:220px;height:64px;display:inline-flex;position:relative;overflow:hidden}.brand-logo img{mix-blend-mode:multiply;width:300px;max-width:none;height:auto;display:block;position:absolute;transform:translate(-38px,-18px)}.site-header nav>a{align-items:center;min-height:44px;display:inline-flex}.site-header nav>.nav-cta{min-height:44px}.portal-card .brand-logo{width:280px;height:82px;margin-bottom:26px}.portal-card .brand-logo img{width:380px;transform:translate(-48px,-23px)}@media (max-width:600px){.site-header{flex-wrap:wrap;place-content:center;row-gap:10px;height:132px}.site-header .brand-logo{width:200px;height:58px}.site-header .brand-logo img{width:274px;transform:translate(-36px,-17px)}.site-header nav{justify-content:center;gap:24px;width:100%}.portal-card .brand-logo{width:230px;height:68px}.portal-card .brand-logo img{width:315px;transform:translate(-41px,-20px)}footer .brand-logo{width:190px;height:56px}footer .brand-logo img{width:260px;transform:translate(-34px,-16px)}}
.mobile-preview{grid-template-columns:.82fr 1.18fr;align-items:center;gap:46px;max-width:1280px;display:grid}.mobile-preview-copy h2{letter-spacing:-2.8px;margin:14px 0;font-size:clamp(40px,5vw,62px);line-height:1}.mobile-preview-copy h2 span{color:var(--blue)}.mobile-preview-copy p{color:var(--muted);font-size:17px;font-weight:650;line-height:1.7}.platform-list{flex-wrap:wrap;gap:9px;margin-top:24px;display:flex}.platform-list span{color:#176da9;background:#eef8ff;border-radius:12px;padding:9px 12px;font-size:12px;font-weight:850}.mobile-preview-art{box-shadow:var(--shadow);background:#fff;border:1px solid #d9e9f8;border-radius:34px;overflow:hidden}.mobile-preview-art img{width:100%;height:auto;display:block}@media (max-width:800px){.mobile-preview{grid-template-columns:1fr;gap:28px}.mobile-preview-copy{text-align:center}.platform-list{justify-content:center}.mobile-preview-art{border-radius:25px}}@media (max-width:600px){.mobile-preview-copy h2{font-size:42px}.mobile-preview-copy p{font-size:15px}.mobile-preview-art{margin-inline:-8px}}
