/* The Lesson — shared styles. No framework or build step required. */
:root{--paper:#f7f7ef;--ink:#182a43;--muted:#5b6570;--lime:#d5f478;--blue:#e4ecf6;--line:#dce1d9;--white:#fff;--radius:24px;--container:1280px}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:110px}body{margin:0;background:var(--paper);color:var(--ink);font-family:Manrope,Arial,sans-serif;font-size:17px;line-height:1.65}a{color:inherit;text-decoration:none}button{font:inherit}p,h1,h2,h3{margin:0}h1,h2,h3{line-height:1.14;font-weight:700;letter-spacing:-.035em}h1{font-size:clamp(2.75rem,5vw,4.5rem)}h2{font-size:clamp(2.1rem,3.1vw,2.75rem)}h3{font-size:1.5rem}a,button{-webkit-tap-highlight-color:transparent}a:focus-visible,button:focus-visible{outline:3px solid #496acf;outline-offset:6px;border-radius:6px}.container{width:min(var(--container),calc(100% - 10rem));margin-inline:auto}.eyebrow{font-size:.75rem;font-weight:800;letter-spacing:.035em;text-transform:uppercase;color:var(--muted);line-height:1.6}.section{padding-block:64px 80px}.section>.eyebrow{margin-bottom:32px}.section>h2{margin-bottom:40px}.lead{font-size:1.25rem;color:var(--muted);line-height:1.6}.logo{font-size:1.75rem;font-weight:800;letter-spacing:-.055em;white-space:nowrap;line-height:1.25}.skip-link{position:fixed;z-index:20;left:16px;top:8px;padding:12px 20px;background:var(--ink);color:white;transform:translateY(-160%)}.skip-link:focus{transform:none}
.site-header{position:sticky;top:0;z-index:10;background:var(--paper);border-bottom:1px solid transparent}.header-inner{min-height:90px;display:flex;align-items:center;justify-content:space-between;gap:32px}.site-header nav{display:flex;align-items:center;gap:32px;font-size:.9375rem;font-weight:700}.site-header nav a{padding-block:10px}.site-header nav a:hover,.back-link:hover{text-decoration:underline;text-underline-offset:5px}.menu-toggle{display:none;border:1px solid var(--line);border-radius:10px;background:none;color:var(--ink);padding:8px 12px;cursor:pointer}.menu-toggle[hidden]{display:none}
.hero{display:grid;grid-template-columns:minmax(0,1.5fr) minmax(0,1fr);gap:64px;align-items:center;padding-block:80px 64px}.hero-copy>.eyebrow{margin-bottom:32px}.hero-copy h1{margin-bottom:28px}.hero-copy .lead{max-width:690px;margin-bottom:32px}.button{display:inline-flex;justify-content:center;align-items:center;min-height:60px;padding:16px 26px;border:1px solid var(--ink);border-radius:16px;background:var(--ink);color:var(--white);font-size:1rem;font-weight:700;line-height:1.4;transition:background .18s,transform .18s}.button:hover{background:#2c4260;transform:translateY(-2px)}.hero-meta{margin-top:24px;font-size:.8125rem;color:var(--muted)}.hero-meta span{padding-inline:8px}.math-visual{padding:32px;background:var(--blue);border-radius:32px}.math-visual>.eyebrow{color:var(--ink);font-size:.6875rem;margin-bottom:32px}.equation{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;margin-bottom:24px}.equation span{display:grid;place-items:center;aspect-ratio:1;background:white;border-radius:16px;font-size:3.25rem;font-weight:500;line-height:1}.equation span:nth-child(2){background:var(--lime)}.learning-note{padding:24px;background:white;border-radius:16px}.learning-note strong{font-size:1.625rem;line-height:1.25;letter-spacing:-.035em}.learning-note p{margin-top:8px;font-size:.875rem;color:var(--muted)}
.course-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}.lime{background:var(--lime)}.blue{background:var(--blue)}.course-card{padding:40px;border-radius:var(--radius);display:flex;flex-direction:column;gap:24px;transition:transform .2s,box-shadow .2s}.course-card:hover{transform:translateY(-5px);box-shadow:0 12px 28px #182a4310}.course-card .eyebrow{font-size:.6875rem}.course-card h3{font-size:2.5rem}.course-card>p:not(.eyebrow){font-size:1.0625rem;line-height:1.6}.course-bottom{display:flex;justify-content:space-between;align-items:center;gap:24px;border-top:1px solid #182a4320;padding-top:24px;margin-top:auto}.course-bottom strong{font-size:1.375rem;white-space:nowrap}.course-bottom strong span{font-size:1rem}.course-link{font-size:1rem;font-weight:800}.course-card:hover .course-link{text-decoration:underline;text-underline-offset:5px}.how h2{font-size:clamp(2rem,2.5vw,2.25rem)}.steps{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:40px;padding:0;margin:0;list-style:none}.step-number{font-size:.875rem;font-weight:700;color:var(--muted)}.steps h3{margin-block:16px 12px}.steps p{font-size:1rem;color:var(--muted)}
.contact{background:var(--ink);color:white;padding-block:80px;margin-top:16px}.contact .eyebrow{color:var(--lime);margin-bottom:24px}.contact h2{font-size:clamp(2.25rem,4vw,3.5rem);margin-bottom:24px}.contact>.container>p:not(.eyebrow){font-size:1.125rem;max-width:800px}.contact-links{display:flex;flex-wrap:wrap;gap:24px 48px;margin-top:32px}.contact-links a{font-size:clamp(1.1rem,1.8vw,1.5625rem);font-weight:700}.contact-links a:first-child{color:var(--lime);overflow-wrap:anywhere}.contact-links a:hover{text-decoration:underline;text-underline-offset:6px}.footer-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;padding-block:36px}.site-footer .logo{font-size:1.25rem}.site-footer p{font-size:.8125rem;color:var(--muted)}
.detail-hero{padding-block:64px}.back-link{display:inline-block;color:var(--muted);font-size:.875rem;font-weight:700;margin-bottom:40px}.detail-hero>.eyebrow{margin-bottom:32px}.detail-grid{display:grid;grid-template-columns:minmax(0,1.7fr) minmax(300px,1fr);gap:64px;align-items:start}.detail-grid h1{font-size:clamp(2.75rem,4.45vw,4rem);margin-bottom:28px}.price-card{padding:32px;border-radius:var(--radius)}.price-card .price{font-size:3.75rem;line-height:1.2;font-weight:700;letter-spacing:-.045em;margin-block:16px}.price-card .button{width:100%;margin-top:24px}.price-card .price-note{font-size:.8125rem;color:var(--muted);margin-top:16px}.included{padding-top:24px}.benefits{list-style:none;margin:0;padding:0}.benefits li{display:grid;grid-template-columns:64px minmax(220px,.9fr) minmax(0,1.6fr);gap:32px;border-top:1px solid var(--line);padding-block:28px;align-items:start}.benefits h3{font-size:1.375rem;line-height:1.4}.benefits p{color:var(--muted);font-size:1.0625rem}.location-note{background:white;border-radius:16px;padding:32px;margin-top:24px}.location-note p{margin-top:12px;color:var(--muted)}
/* The intro is visible only when JavaScript opts in; content works without JS. */
.intro{display:none}.intro.is-active{display:grid;place-items:center;position:fixed;inset:0;background:var(--paper);z-index:30;pointer-events:none;animation:intro-out .55s ease .65s forwards}.intro .logo{font-size:clamp(3rem,7vw,5.5rem);animation:logo-rise .7s ease .4s forwards}@keyframes intro-out{to{opacity:0;visibility:hidden}}@keyframes logo-rise{to{transform:translateY(-15vh) scale(.85)}}
@media(min-width:1600px){.hero{grid-template-columns:720px 480px;gap:80px}}
@media(max-width:1100px){.container{width:calc(100% - 64px)}.hero{gap:36px}.hero h1{font-size:3.25rem}.desktop-break{display:none}.math-visual{padding:24px}.equation{gap:12px}.learning-note{padding:20px}.learning-note strong{font-size:1.3rem}.course-card{padding:32px}.course-bottom{align-items:flex-start;flex-direction:column;gap:12px}.detail-grid{gap:32px}.benefits li{grid-template-columns:40px 1fr 1.4fr;gap:20px}}
@media(max-width:760px){html{scroll-padding-top:92px}.container{width:calc(100% - 48px)}.header-inner{min-height:80px;flex-wrap:wrap;gap:16px}.logo{font-size:1.5rem}.site-header nav{width:100%;gap:20px;flex-wrap:wrap;padding-bottom:16px;font-size:.875rem}.js-menu .menu-toggle{display:block}.js-menu nav{display:none}.js-menu nav.is-open{display:flex}.hero{grid-template-columns:1fr;gap:40px;padding-block:48px}.hero h1{font-size:clamp(2.7rem,8.8vw,3.5rem)}.hero-copy>.eyebrow{margin-bottom:24px}.lead{font-size:1.125rem}.hero-meta{line-height:1.9}.hero .button{width:100%}.math-visual{padding:32px}.equation span{font-size:3rem}.learning-note strong{font-size:1.5rem}.section{padding-block:32px 48px}.section>.eyebrow{margin-bottom:24px}.section>h2{margin-bottom:28px}.course-grid,.steps,.detail-grid{grid-template-columns:1fr}.course-card{padding:28px;gap:24px}.course-card h3{font-size:2rem}.course-card>p:not(.eyebrow){font-size:1rem}.course-bottom{flex-direction:row;align-items:center;gap:16px}.course-bottom strong{font-size:1.2rem}.course-bottom strong span{font-size:.875rem}.course-link{font-size:.875rem}.steps{gap:32px}.steps h3{margin-top:8px}.contact{padding-block:48px;margin-top:0}.contact-links{flex-direction:column;gap:16px}.contact-links a{font-size:1.125rem}.contact-links a:last-child{font-size:1.375rem}.footer-inner{align-items:flex-start;flex-direction:column;gap:8px;padding-block:28px}.detail-hero{padding-block:32px 48px}.detail-grid{gap:32px}.detail-grid h1{font-size:2.75rem}.price-card{padding:28px}.benefits li{grid-template-columns:32px 1fr;gap:12px 16px}.benefits p{grid-column:2;font-size:1rem}.location-note{padding:24px}.location-note h3{font-size:1.375rem}}
@media(max-width:370px){.container{width:calc(100% - 32px)}.hero h1,.detail-grid h1{font-size:2.35rem}.math-visual{padding:24px}.course-card{padding:24px}.course-bottom{flex-direction:column;align-items:flex-start}.learning-note strong{font-size:1.3rem}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{animation:none!important;transition:none!important}.intro.is-active{display:none}}
@media print{.site-header,.menu-toggle,.intro,.skip-link{display:none!important}.container{width:100%}.hero,.detail-grid{display:block}.section,.hero,.detail-hero,.contact{padding-block:24px}.contact{background:white;color:var(--ink)}.contact .eyebrow,.contact-links a:first-child{color:var(--ink)}a{color:inherit}.course-card,.price-card{break-inside:avoid}}