@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;500;600;700&family=Playfair+Display:ital,wght@0,600;0,700;1,600;1,700&display=swap');
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.menu-icon{font-size:16px;line-height:1}
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/* Desktop navigation uses the original direct header layout; the toggle is mobile-only. */
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.hero-content-cards{width:100%;min-width:0;grid-template-columns:minmax(0,1fr);gap:11px;align-self:center}
.hero-content-cards .home-content-card{min-height:0;padding:15px 17px 13px;border-radius:9px}
.hero-content-cards .home-card-heading{gap:10px;padding-bottom:10px}
.hero-content-cards .home-card-icon{flex-basis:34px;height:34px;border-radius:11px;font-size:19px}
.hero-content-cards .home-card-heading .eyebrow{font-size:7px}
.hero-content-cards .home-card-heading h2{font-size:15px}
.hero-content-cards .home-card-body{padding-top:10px}
.hero-content-cards .home-card-empty{min-height:54px;flex-direction:row;align-items:center;justify-content:flex-start;gap:9px;text-align:left}
.hero-content-cards .home-card-empty strong{flex:0 0 auto;font-size:14px;margin:0}
.hero-content-cards .home-card-empty p{max-width:none;margin:0;font-size:10px}
.hero-content-cards .featured-notice h3,.hero-content-cards .featured-performance h3{font-size:16px;margin:4px 0}
.hero-content-cards .featured-notice p,.hero-content-cards .featured-performance>p{font-size:10px;line-height:1.5;margin-bottom:6px}
.hero-content-cards .featured-feedback{padding-bottom:7px;margin-bottom:7px}
.hero-content-cards .featured-feedback blockquote{-webkit-line-clamp:2;font-size:10px;margin-bottom:5px}
.hero-content-cards .featured-performance-foot{padding-top:7px;font-size:9px}
.hero-content-cards .featured-performance-foot strong{font-size:15px}
.hero-art-left .hero-content-cards{grid-column:1;grid-row:1}
.hero-art-left .hero-copy{grid-column:2;grid-row:1}
.hero-centered .hero-content-cards{width:min(100%,760px);margin:0 auto;text-align:left}
@media(max-width:760px){.hero-content-cards{max-width:620px;margin:0 auto}.hero-content-cards .home-content-card{padding:14px 15px}.hero-content-cards .home-card-empty{min-height:48px}}
.home-page .hero h1{font-size:64px}
.home-page .hero-copy>p{font-size:17px;line-height:1.75;max-width:470px}
.home-page .hero .eyebrow{font-size:12px}
.home-page .hero .search input{font-size:15px}
.home-page .hero .search .button{font-size:14px}
.home-page .hero-content-cards .home-card-heading h2{font-size:17px}
.home-page .hero-content-cards .home-card-heading .eyebrow{font-size:8px}
.home-page .hero-content-cards .home-card-empty strong{font-size:15px}
.home-page .hero-content-cards .home-card-empty p,.home-page .hero-content-cards .featured-notice p,.home-page .hero-content-cards .featured-performance>p{font-size:12px}
.home-page .hero-content-cards .featured-notice h3,.home-page .hero-content-cards .featured-performance h3{font-size:18px}
.home-page .hero-content-cards .featured-feedback blockquote{font-size:12px}
.home-page .section-head h2{font-size:33px}
.home-page .course-info h3{font-size:21px}
.home-page .course-info p{font-size:14px;line-height:1.65}
.home-page .course-info .meta,.home-page .course-info .teacher{font-size:12px}
@media(max-width:760px){.home-page .hero h1{font-size:52px}.home-page .hero-copy>p{font-size:16px}.home-page .section-head h2{font-size:28px}}
@media(max-width:480px){.home-page .hero h1{font-size:46px}.home-page .hero-copy>p{font-size:15px}.home-page .course-info h3{font-size:19px}}
.hero-content-cards .home-card-heading{position:relative}
.home-card-illustration{flex:0 0 62px;width:62px;height:44px;margin-left:auto;overflow:visible}
.notice-illustration{color:#68815c}
.performance-illustration{color:#d0a276}
.feedback-illustration{color:#9b8194}
@media(max-width:480px){.home-card-illustration{flex-basis:50px;width:50px;height:38px}}
.feedback-avatar-image{display:block;flex:0 0 32px;width:32px;height:32px;border-radius:50%;object-fit:cover;border:2px solid #e9eee1}
.hero-eyebrow-row{display:flex;flex-direction:column;align-items:flex-start;gap:2px;max-width:510px}
.hero-eyebrow-row>.eyebrow{flex:1}
.hero-math-animations{display:flex;align-items:center;justify-content:space-between;gap:8px;width:100%;max-width:410px}
.math-hero-svg{flex:0 0 140px;width:140px;height:68px;overflow:visible;color:#64815a}
.tangent-hero-svg{flex:0 0 190px;width:190px;height:78px;overflow:visible;color:#64815a}
.math-orbit-ring{fill:none;stroke:#9caf8b;stroke-width:1.3;stroke-dasharray:3 4;transform-origin:70px 34px;animation:math-ring-pulse 3.8s ease-in-out infinite}
.math-center{fill:#e8eedf;stroke:#8da47c;stroke-width:1.5}
.math-center-symbol{fill:#45654c;font:italic 17px Georgia,serif}
.math-orbiting-points{fill:#c3966e;transform-origin:70px 34px;animation:math-orbit 7s linear infinite}
.math-symbol{fill:#58734f;font:italic 13px Georgia,serif;animation:math-float 2.8s ease-in-out infinite}
.math-root{animation-delay:-1.1s}.math-square{animation-delay:-1.8s}
@keyframes math-orbit{to{transform:rotate(360deg)}}
@keyframes math-ring-pulse{0%,100%{opacity:.45}50%{opacity:1}}
@keyframes math-float{0%,100%{transform:translateY(0);opacity:.7}50%{transform:translateY(-4px);opacity:1}}
@media(max-width:480px){.hero-math-animations{gap:2px}.math-hero-svg{flex-basis:110px;width:110px;height:54px}.tangent-hero-svg{flex-basis:145px;width:145px;height:60px}}
.tangent-circle{fill:#f1f4eb;stroke:#91a781;stroke-width:1.7}
.tangent-center{fill:#4f6e53}
.tangent-rotor{transform-box:view-box;transform-origin:34px 35px}
.tangent-radius{stroke:#58764f;stroke-width:2;stroke-linecap:round}
.tangent-line{stroke:#c08e65;stroke-width:2;stroke-linecap:round}
.tangent-right-angle{fill:none;stroke:#526f52;stroke-width:1.7;stroke-linejoin:round}
.tangent-point{fill:#d5a16f;stroke:#fff;stroke-width:1;transform-box:fill-box;transform-origin:center;animation:tangent-highlight 2s ease-in-out infinite}
.tangent-label{fill:#52634b;font:italic 11px Georgia,serif}
.tangent-formula{fill:#45624b;font:italic 16px Georgia,serif}
.tangent-degrees{fill:#8e6e50;font:600 13px 'DM Sans',Arial,sans-serif}
@keyframes tangent-highlight{0%,100%{opacity:.65;transform:scale(.85)}50%{opacity:1;transform:scale(1.3)}}
@media(prefers-reduced-motion:reduce){.tangent-point{animation:none!important}}
@media(prefers-reduced-motion:reduce){.math-orbiting-points,.math-orbit-ring,.math-symbol{animation:none!important}}
.home-science-doodles{display:flex;align-items:center;gap:13px;flex:0 0 auto;color:#718866}
.home-science-doodles svg{display:block;width:108px;height:82px;overflow:visible}
.physics-electron{transform-origin:50px 35px;animation:physics-orbit 5s linear infinite}
.physics-wave{stroke-dasharray:7 5;animation:physics-wave-flow 2.5s linear infinite}
.chem-bubble{transform-box:fill-box;transform-origin:center;animation:chemistry-bubble 2s ease-in-out infinite}
.bubble-two{animation-delay:-.9s}
@keyframes physics-orbit{to{transform:rotate(360deg)}}
@keyframes physics-wave-flow{to{stroke-dashoffset:-24}}
@keyframes chemistry-bubble{0%,100%{transform:translateY(2px);opacity:.55}50%{transform:translateY(-7px);opacity:1}}
@media(max-width:760px){.home-science-doodles{gap:4px}.home-science-doodles svg{width:86px;height:66px}}
@media(max-width:520px){.home-science-doodles svg{width:62px;height:50px}.home-science-doodles{gap:0}}
@media(prefers-reduced-motion:reduce){.physics-electron,.physics-wave,.chem-bubble{animation:none!important}}
.hero-content-cards .home-content-card{transform:translateY(0);transition:transform .24s ease,box-shadow .24s ease,border-color .24s ease}
.hero-content-cards .home-card-illustration{transform:translateY(0) rotate(0deg);transition:transform .32s cubic-bezier(.2,.75,.3,1)}
@media(hover:hover){.hero-content-cards .home-content-card:hover{transform:translate(5px,-6px);box-shadow:0 18px 36px #26322620;border-color:#cfd8c4}.home-notice-card:hover .home-card-illustration{transform:translate(3px,-3px) rotate(-4deg)}.home-performance-card:hover .home-card-illustration{transform:translate(3px,-4px) scale(1.06)}.home-feedback-card:hover .home-card-illustration{transform:translate(3px,-3px) rotate(3deg)}}
.hero-content-cards .home-content-card:focus-within{transform:translate(4px,-4px);box-shadow:0 16px 32px #26322618}
@media(prefers-reduced-motion:reduce){.hero-content-cards .home-content-card,.hero-content-cards .home-card-illustration{transition:none!important}}
.dashboard-lesson-list{display:grid;gap:7px;margin-top:16px}.dashboard-lesson-list a{display:flex;justify-content:space-between;align-items:center;gap:12px;padding:9px 11px;border:1px solid var(--line);border-radius:5px;background:#fff;font-size:12px;line-height:1.45;transition:border-color .15s,background .15s}.dashboard-lesson-list a:hover{border-color:#a9bb96;background:#f6f8f2}.dashboard-lesson-list a span:last-child{flex:0 0 auto;color:var(--green);font-size:10px;font-weight:700}.dashboard-lesson-list a.is-complete{background:#f1f5ed}.lesson-row a{color:var(--green);font-weight:600;text-decoration:underline;text-decoration-color:#cbd6c0;text-underline-offset:3px}.lesson-row a:hover{text-decoration-color:var(--green)}@media(max-width:480px){.dashboard-lesson-list a{align-items:flex-start;font-size:11px}.dashboard-lesson-list a span:last-child{font-size:9px}}
.performance-carousel{display:flex;flex:1;min-width:0;flex-direction:column}.performance-slides{display:flex;flex:1;min-height:0}.performance-slide{width:100%}.performance-slide[hidden]{display:none!important}.performance-slide.is-active{animation:performance-arrive .42s ease-out both}.performance-carousel-controls{display:flex;align-items:center;justify-content:flex-end;gap:9px;margin-top:9px;color:var(--muted);font-size:9px;font-weight:700}.performance-carousel-controls button{display:grid;place-items:center;width:25px;height:25px;padding:0;border:1px solid #e5e7dc;border-radius:50%;background:#fff;color:var(--green);font:18px/1 var(--sans);cursor:pointer;transition:background .15s,border-color .15s}.performance-carousel-controls button:hover{background:#eff3e8;border-color:#cbd7bf}.performance-carousel-controls button:focus-visible{outline:2px solid #638456;outline-offset:2px}@keyframes performance-arrive{from{opacity:0;transform:translateX(12px)}to{opacity:1;transform:translateX(0)}}@media(prefers-reduced-motion:reduce){.performance-slide.is-active{animation:none}}

.nav-account{display:flex;align-items:center;gap:10px}.nav-username{color:var(--green);font-size:11px;font-weight:700;white-space:nowrap}.nav-account .nav-form{display:flex;align-items:center;padding:0}@media(max-width:760px){.topbar nav .nav-account{padding:9px 12px;justify-content:space-between;border-top:1px solid var(--line);margin-top:4px}.nav-username{font-size:12px}.nav-account .nav-link{font-size:12px}}