.landing{--forest:#193e35;--green:#187153;--muted:#5e7069;--line:#d7e2dc;--paper:#f6f8f3;background:var(--paper);color:var(--forest);font:16px/1.65 system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}
.landing [hidden]{display:none!important}.landing *{min-width:0}.landing a{color:inherit}.landing button,.landing input{font:inherit}.landing button{cursor:pointer}.landing :focus-visible{outline:3px solid #bd5a24;outline-offset:4px}.landing .sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.landing .skip-link{position:fixed;top:8px;left:8px;z-index:10;background:white;padding:10px;transform:translateY(-160%)}.landing .skip-link:focus{transform:none}
.landing header,.landing main,.landing footer{max-width:none;margin:0;padding:0}.landing section{margin:0}.landing .section-shell{max-width:1200px;padding-left:32px;padding-right:32px;margin-left:auto;margin-right:auto}.landing h1,.landing h2,.landing h3,.landing p{margin-top:0}.landing h1,.landing h2{font-family:Georgia,"Times New Roman",serif;font-weight:400;letter-spacing:-.045em}.landing h2{font-size:clamp(30px,3.2vw,43px);line-height:1.15;margin-bottom:18px}.landing h3{font-size:20px;line-height:1.3;letter-spacing:-.02em}.landing .eyebrow{font-size:10px;letter-spacing:.14em;line-height:1.6;font-weight:750;margin-bottom:18px}.landing .brand{font-size:27px;letter-spacing:-.045em;font-weight:850;white-space:nowrap}.landing .brand span{color:#19845e}
.landing .site-header{display:block;background:#fff;border-bottom:1px solid var(--line)}.landing .header-inner{width:100%;max-width:1200px;margin:auto;display:flex;gap:30px;align-items:center;padding:20px 32px}.landing .catalog-search{display:flex;align-items:center;gap:10px;flex:1;max-width:530px;margin-left:8px;border:1px solid #cbd9d1;background:#f8faf7;border-radius:6px;padding:8px 10px 8px 14px}.catalog-search svg{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:1.6;flex:none}.landing .catalog-search input{width:100%;border:0;outline:0;background:transparent;padding:3px 0;font-size:13px;color:var(--forest)}.landing .catalog-search:focus-within{outline:2px solid var(--green);outline-offset:2px}.landing .catalog-search button{border:0;background:transparent;color:var(--forest);font-size:12px;font-weight:700;padding:5px}.landing .header-nav{display:flex;align-items:center;gap:24px;margin-left:auto;font-size:12px;font-weight:650}.landing .header-nav a{text-decoration:none;white-space:nowrap}.landing .header-nav a:hover{text-decoration:underline}.landing .sign-in{border:1px solid var(--forest);padding:10px 16px;border-radius:4px}.landing .sign-in span{margin-left:8px}
.landing .hero{display:grid;grid-template-columns:1fr 1fr;gap:54px;align-items:center;padding-top:68px;padding-bottom:68px}.landing .hero-copy{padding-bottom:14px}.landing .hero-copy .eyebrow{color:#4d6f5f}.landing .tiny-star{color:#a85a30;font-size:19px;vertical-align:middle;margin-right:7px}.landing h1{font-size:clamp(40px,4.25vw,58px);line-height:1.08;margin:20px 0 25px;letter-spacing:-.055em}.landing h1 span{color:#278064}.landing .hero-description{max-width:465px;color:var(--muted);font-size:17px;line-height:1.75;margin-bottom:28px}.landing .hero-actions{display:flex;gap:12px;flex-wrap:wrap}.landing .primary-link,.landing .secondary-link{display:inline-flex;align-items:center;justify-content:space-between;gap:22px;padding:13px 19px;border:1px solid var(--forest);border-radius:4px;font-size:13px;font-weight:650;text-decoration:none;line-height:1.5}.landing .primary-link{background:var(--forest);color:white}.landing .secondary-link{background:transparent;color:var(--forest)}.landing .primary-link:hover{background:#28644e}.landing .secondary-link:hover{background:#e6eee5}.landing .hero-meta{margin:22px 0 0;color:var(--muted);font-size:11px}.landing .hero-meta span{margin:0 6px}
.landing .lesson-preview{background:white;border:1px solid #cbdcd2;border-radius:12px;box-shadow:0 15px 45px #193e3512;overflow:hidden;transform:rotate(.5deg)}.landing .preview-top{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:13px 19px;border-bottom:1px solid var(--line);background:#fcfdfb}.landing .preview-label{font-size:8px;font-weight:750;letter-spacing:.12em;display:flex;align-items:center;gap:6px}.status-dot{width:6px;height:6px;border-radius:50%;background:#288363;display:inline-block}.landing .preview-subject{font-size:9px;color:var(--muted)}.landing .preview-content{padding:24px 24px 18px}.landing .preview-content h2{font-size:23px;letter-spacing:-.035em;margin-bottom:7px}.landing .preview-intro{font-size:11px;color:var(--muted);margin-bottom:10px}.effect-chart{width:100%;height:auto;display:block;overflow:visible}.chart-grid path{fill:none;stroke:#e6ede7;stroke-width:1}.chart-ticks text{font-size:10px;fill:#65776c;text-anchor:end}.chart-axis{font-size:10px;fill:#476252}.chart-average{fill:none;stroke:#a1b5a6;stroke-dasharray:4 4}.average-label{font-size:9px;fill:#627c69}.chart-curve{fill:none;stroke:#288464;stroke-width:3.5;stroke-linecap:round}.chart-marker{fill:none;stroke:#b86839;stroke-width:1.4;stroke-dasharray:4 4}#effectPoint{fill:#b86839;stroke:#fff;stroke-width:2.5}.landing .preview-control{margin-top:8px}.landing .preview-control label{display:flex;justify-content:space-between;font-size:11px;font-weight:650}.landing .preview-control output{color:#8c4726}.landing input[type=range]{width:100%;accent-color:#287557;min-height:28px;margin:6px 0 0}.landing .range-ends{display:flex;justify-content:space-between;font-size:9px;color:#62766a}.landing .ozzy-example{display:flex;align-items:flex-start;gap:10px;background:#edf4eb;border:1px solid #dfebdc;border-radius:6px;padding:12px;margin-top:17px}.landing .ozzy-avatar{width:26px;height:26px;flex:none;background:#215e48;color:white;border-radius:8px;display:grid;place-items:center;font-family:Georgia,serif;font-size:17px}.landing .ozzy-example-label{font-size:10px;font-weight:750;margin-bottom:3px}.landing .ozzy-example-label span{font-weight:400;color:#5b7161}.landing .ozzy-example p:last-child{font-size:11px;line-height:1.6;margin:0}.landing .preview-note{font-size:9px;color:#6b786e;line-height:1.5;margin:12px 0 0}
.landing .learning-strip{background:#eaf0e7;border-top:1px solid #dde6d9;border-bottom:1px solid #dde6d9}.landing .strip-inner{display:grid;grid-template-columns:repeat(3,1fr);gap:30px;padding-top:22px;padding-bottom:22px}.landing .strip-inner p{display:grid;grid-template-columns:34px 1fr;column-gap:13px;margin:0}.strip-icon{grid-row:span 2;align-self:center;font:italic 24px Georgia,serif;color:#6d8b72}.landing .strip-inner strong{font-size:13px}.landing .strip-inner p>span:last-child{font-size:11px;color:#647565}
.landing .catalog{padding-top:75px;padding-bottom:72px}.landing .catalog-heading{display:flex;align-items:flex-end;justify-content:space-between;gap:40px}.landing .catalog-heading h2{margin-bottom:22px}.landing .catalog-heading>p{max-width:330px;font-size:14px;color:var(--muted);margin-bottom:27px}.landing .catalog-toolbar{border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;gap:20px;margin:10px 0 35px}.landing .catalog-filters{display:flex;gap:25px}.landing .catalog-filters button{background:none;border:0;border-bottom:3px solid transparent;color:#627366;font-size:13px;font-weight:650;padding:13px 0}.landing .catalog-filters button[aria-pressed=true]{color:var(--forest);border-color:var(--forest)}.landing .catalog-filters span{margin-left:4px;font-size:10px;color:#718473}.landing .catalog-status{font-size:11px;color:var(--muted);margin:0}.landing .catalog-section{padding:10px 0 35px;scroll-margin-top:24px}.landing .section-heading{display:flex;align-items:flex-end;justify-content:space-between;gap:30px;margin-bottom:22px}.landing .section-heading h2{font-size:27px;letter-spacing:-.03em;margin-bottom:0}.landing .section-heading .eyebrow{font-size:9px;margin-bottom:9px;color:#67795f}.landing .section-heading>p{font-size:12px;color:var(--muted);max-width:320px;margin:0}.landing .course-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:18px}.landing .catalog-card{border:1px solid #d5e0d7;border-radius:7px;overflow:hidden;background:white;transition:box-shadow .18s,border-color .18s}.landing .catalog-card:hover{box-shadow:0 8px 24px #1b493b0e;border-color:#9fb8a6}.landing .course-art{height:150px;padding:15px 18px 0;overflow:hidden}.course-art>span{font-size:8px;letter-spacing:.16em;font-weight:750}.course-art svg{display:block;width:100%;height:112px}.course-art svg path{fill:none;stroke:currentColor;stroke-width:2}.course-art .art-axis{opacity:.24;stroke-width:1}.course-art .art-dashed{stroke-dasharray:5 4;opacity:.65}.art-causal{background:#dfece0;color:#2f6850}.art-causal circle{fill:#eff5eb;stroke:currentColor;stroke-width:1.5}.art-causal text{fill:currentColor;font:13px Georgia,serif;text-anchor:middle}.art-statistics{background:#f3e8d8;color:#946f3d}.art-time{background:#e1eaf0;color:#436882}.art-ml{background:#e8e3ef;color:#71628b}.art-ml .art-points{fill:#8974a4}.art-ml .art-points-alt{fill:#d5aa66}.landing .card-content{padding:19px 18px 16px}.landing .availability{font-size:9px;font-weight:650;background:#f1f1e9;color:#73734b;border:1px solid #e7e8d7;border-radius:3px;padding:3px 6px;display:inline-block;margin-bottom:11px}.landing .availability.available{background:#e6f1e7;color:#397248;border-color:#d2e4d4}.landing .card-content h3{font-size:17px;min-height:44px;margin-bottom:9px}.landing .card-content>p{font-size:12px;line-height:1.7;color:var(--muted);margin-bottom:13px}.landing .card-content .card-audience{font-size:10px;margin:17px 0 4px;color:#637463}.landing .card-content .card-language{font-size:10px;margin-bottom:18px;color:#7a877b}.landing details>summary{cursor:pointer;list-style:none}.landing details>summary::-webkit-details-marker{display:none}.landing .card-content summary{font-size:11px;font-weight:700;border-top:1px solid #e5ece4;padding-top:13px;display:flex;justify-content:space-between;gap:10px}.landing .card-content details[open] summary{margin-bottom:12px}.landing .card-details{font-size:11px;color:#576b5b}.landing .card-details ul{padding-left:16px;margin:0 0 12px}.landing .card-details li{margin:6px 0}.landing .card-details p{margin-bottom:10px}.landing .card-details a{font-weight:650}.landing #applications{padding-top:30px}.landing .application-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}.landing .app-visual{height:100px;background:#f0f3ec;border-bottom:1px solid #e6eade;padding:18px 20px;display:flex;align-items:center;justify-content:space-between;gap:15px}.app-symbol{font-size:10px;letter-spacing:.16em;font-weight:750}.mini-bars{display:flex;align-items:flex-end;height:60px;gap:7px}.mini-bars i{display:block;width:12px;background:#74a183;border-radius:2px 2px 0 0}.mini-bars i:nth-child(1){height:27px}.mini-bars i:nth-child(2){height:46px}.mini-bars i:nth-child(3){height:35px}.mini-bars i:nth-child(4){height:58px}.mini-bars i:nth-child(5){height:39px}.app-visual svg{width:145px;height:60px;fill:none;stroke:#688e74;stroke-width:2}.app-visual circle{fill:#688e74;stroke:#f0f3ec;stroke-width:2}.app-visual .art-dashed{stroke-dasharray:3 3;opacity:.6}.landing .application-card-public .card-content h3{min-height:0}.landing .application-card-public .card-content>p{min-height:62px}.landing .application-note{font-size:11px;color:var(--muted);margin:18px 0 0}.landing .no-results{padding:45px;text-align:center;border:1px dashed #c2d4c5;border-radius:8px}.landing .no-results h3{margin-bottom:10px}.landing .no-results p{color:var(--muted);font-size:13px}.landing .no-results button{border:1px solid var(--forest);background:var(--forest);color:white;border-radius:4px;padding:10px 15px}.no-script-note{font-size:12px}
.landing .how-section{padding:68px 0;background:#eaf0e7;border-top:1px solid #dbe6d6;border-bottom:1px solid #dbe6d6}.landing .how-grid{display:grid;grid-template-columns:.9fr 1.1fr;gap:100px}.landing .how-grid>div>p:last-child{max-width:330px;color:var(--muted);font-size:14px}.landing .how-steps{list-style:none;padding:0;margin:0;display:grid;gap:24px}.landing .how-steps li{display:flex;align-items:flex-start;gap:24px;margin:0}.landing .how-steps li>span{font:italic 25px Georgia,serif;color:#6e8c71;border:1px solid #c6d9c2;min-width:49px;height:49px;display:grid;place-items:center;border-radius:50%}.landing .how-steps h3{font-size:16px;margin:0 0 6px}.landing .how-steps p{font-size:13px;color:var(--muted);margin:0}
.landing .instructor-section{padding-top:80px;padding-bottom:80px;display:grid;grid-template-columns:1fr;align-items:center;gap:85px}.landing .instructor-copy h2{font-size:42px;margin-bottom:5px}.landing .instructor-role{font-size:13px;color:#3f7554;font-weight:600;margin-bottom:20px}.landing .instructor-copy>p:not(.eyebrow):not(.instructor-role){font-size:14px;color:var(--muted)}.landing .text-link{font-size:13px;font-weight:650;text-decoration:none;border-bottom:1px solid #9bad9a;padding-bottom:3px}
.landing .pricing-section{background:#f0eddf;border:1px solid #e5e0cb;border-radius:10px;padding:48px;display:grid;grid-template-columns:1fr 1fr;gap:75px;margin-top:0;margin-bottom:75px;max-width:1136px}.landing .pricing-copy>p:not(.eyebrow){font-size:14px;color:#6a705d;max-width:340px}.landing .pricing-copy .pricing-access{font-size:12px!important;border-left:2px solid #a2a481;padding-left:15px;margin-top:24px}.landing .pricing-panel{background:#fff;border:1px solid #dedaC8;border-radius:7px;padding:28px}.landing .plan-name{font-size:10px;letter-spacing:.12em;font-weight:750;margin-bottom:10px}.landing .plan-price{font:46px/1.2 Georgia,serif;letter-spacing:-.05em;margin-bottom:5px}.landing .plan-price span{font:12px system-ui,sans-serif;letter-spacing:0;color:#6d7769}.landing .tax-note{font-size:10px;color:#717b6c}.landing .pricing-panel ul{padding-left:16px;font-size:12px;margin:20px 0}.landing .pricing-panel li{margin:8px 0}.landing .subscription-note,.landing .small-policy{font-size:10px;line-height:1.7;color:#70796b}.landing .pricing-panel .primary-link{display:flex;margin-top:18px}.landing .small-policy{margin:14px 0 0}
.landing .faq-section{display:grid;grid-template-columns:.8fr 1.2fr;gap:70px;padding-bottom:85px}.landing .faq-list details{border-bottom:1px solid var(--line)}.landing .faq-list summary{padding:17px 25px 17px 0;font-size:13px;font-weight:650;position:relative}.landing .faq-list summary:after{content:'+';position:absolute;right:0;top:14px;font-size:20px;font-weight:400;color:#65775e}.landing .faq-list details[open] summary:after{content:'−'}.landing .faq-list p{font-size:12px;color:var(--muted);padding-right:20px;margin-bottom:20px}.landing .site-footer{background:#183e33;color:#e5ede2;border-top:0;padding:45px 0 20px}.landing .site-footer .brand{color:#f5f8ef}.landing .site-footer .brand span{color:#96c2a0}.landing .footer-top{display:flex;justify-content:space-between;gap:70px}.landing .footer-top>div>p{font-size:12px;color:#aac1ac;margin:15px 0 0}.landing .footer-top nav{display:grid;grid-template-columns:repeat(3,auto);gap:12px 38px;align-content:start}.landing .footer-top nav a{font-size:11px;color:#d1dfcd;text-decoration:none}.landing .footer-top nav a:hover{text-decoration:underline}.landing .footer-bottom{border-top:1px solid #426151;display:flex;justify-content:space-between;gap:15px;padding-top:19px;margin-top:35px;font-size:10px;color:#afc4af}.landing .footer-bottom p{margin:0}.landing .footer-bottom a{text-decoration:none}
@media(min-width:1450px){.landing .header-inner{padding-left:60px;padding-right:60px}.landing .hero{gap:70px}}
@media(max-width:1100px){.landing .header-inner{gap:20px}.landing .header-nav{gap:16px}.landing .header-nav>a:not(.sign-in){display:none}.landing .hero{gap:30px}.landing h1{font-size:46px}.landing .hero-meta{font-size:10px}.landing .course-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:22px}.landing .course-art{height:145px}.landing .course-art svg{height:105px;max-width:260px;margin:auto}.landing .card-content h3{min-height:0}.landing .how-grid{gap:45px}.landing .instructor-section{gap:45px}.landing .pricing-section{margin-left:32px;margin-right:32px;gap:30px;padding:32px}}
@media(max-width:760px){.landing .section-shell{padding-left:22px;padding-right:22px}.landing .header-inner{padding:17px 22px;flex-wrap:wrap;gap:14px}.landing .header-inner>.brand{font-size:25px}.landing .header-nav{order:1}.landing .catalog-search{order:2;flex-basis:100%;max-width:none;margin:0}.landing .sign-in{padding:8px 11px}.landing .hero{grid-template-columns:1fr;padding-top:40px;padding-bottom:38px;gap:30px}.landing h1{font-size:clamp(35px,6.8vw,48px);letter-spacing:-.05em}.landing .hero-description{font-size:15px;max-width:540px}.landing .hero-copy{padding-bottom:0}.landing .hero-meta{font-size:10px}.landing .lesson-preview{transform:none;max-width:540px;width:100%;justify-self:center}.landing .preview-content{padding:22px}.landing .preview-label{font-size:8px}.landing .strip-inner{grid-template-columns:1fr;gap:15px;padding-top:20px;padding-bottom:20px}.landing .strip-inner p{grid-template-columns:30px auto;column-gap:12px}.strip-icon{font-size:20px}.landing .strip-inner strong{font-size:12px}.landing .strip-inner p>span:last-child{font-size:11px}.landing .catalog{padding-top:42px;padding-bottom:35px}.landing .catalog-heading{display:block}.landing .catalog-heading h2{font-size:35px}.landing .catalog-heading>p{max-width:420px;margin-bottom:15px;font-size:13px}.landing .catalog-toolbar{align-items:flex-start;flex-direction:column;gap:5px;padding-bottom:10px;margin-bottom:26px}.landing .catalog-filters{gap:22px;width:100%}.landing .catalog-filters button{font-size:11px;padding:10px 0}.landing .catalog-status{font-size:10px}.landing .section-heading{display:block}.landing .section-heading h2{font-size:28px}.landing .section-heading>p{margin-top:10px;max-width:440px}.landing .course-grid{gap:15px}.landing .card-content{padding:16px 14px}.landing .card-content h3{font-size:17px}.landing .card-content>p{font-size:11px}.landing .card-content .card-audience,.landing .card-content .card-language{font-size:9px}.landing .course-art{height:125px;padding:12px 13px 0}.course-art>span{font-size:7px}.course-art svg{height:95px}.landing .application-grid{grid-template-columns:1fr}.landing .application-card-public .card-content>p{min-height:0;font-size:13px}.landing .app-visual{height:85px}.landing .how-section{padding:42px 0}.landing .how-grid{grid-template-columns:1fr;gap:20px}.landing .how-grid h2 br{display:none}.landing .how-grid>div>p:last-child{max-width:440px}.landing .how-steps{gap:21px}.landing .instructor-section{grid-template-columns:1fr;gap:26px;padding-top:45px;padding-bottom:45px}.landing .instructor-copy h2{font-size:37px}.landing .pricing-section{grid-template-columns:1fr;gap:20px;margin:0 22px 45px;padding:27px 22px}.landing .pricing-copy h2 br{display:none}.landing .pricing-panel{padding:24px}.landing .faq-section{grid-template-columns:1fr;gap:6px;padding-bottom:45px}.landing .footer-top{display:block}.landing .footer-top nav{margin-top:25px;grid-template-columns:repeat(2,1fr);gap:14px 18px}.landing .footer-bottom{flex-direction:column;gap:8px}.landing .site-footer{padding-top:30px}}
@media(max-width:420px){.landing .course-grid{grid-template-columns:1fr}.landing .course-art{height:140px}.landing .course-art svg{height:110px}.landing .card-content h3{font-size:19px}.landing .card-content>p{font-size:13px}.landing .card-content .card-audience,.landing .card-content .card-language{font-size:10px}.landing .preview-content{padding:18px 13px}.landing .preview-top{padding:12px}.landing .preview-subject{font-size:8px}.landing .hero-actions{gap:10px}.landing .primary-link,.landing .secondary-link{font-size:12px;padding:12px 15px;gap:16px}.landing .hero-meta{line-height:1.9}}
@media(prefers-reduced-motion:reduce){.landing *{transition:none!important;scroll-behavior:auto!important}}