:root{--ivory:#fffdf6;--ebony:#1b1b1f;--ink-60:#1b1b1f9e;--ink-40:#1b1b1f6b;--hairline:#1b1b1f1a;--display:"Gloock", Georgia, serif;--body-face:"Instrument Sans", -apple-system, "Segoe UI", sans-serif;--mono:ui-monospace, "SF Mono", Menlo, monospace}.site{background:var(--ivory);color:var(--ebony);font-family:var(--body-face);flex-direction:column;min-height:100dvh;display:flex}.site :focus-visible{outline:2px solid var(--ebony);outline-offset:2px;border-radius:2px}.site-header{align-items:center;gap:14px;width:100%;max-width:52rem;margin:0 auto;padding:20px 20px 0;display:flex}.site-logo{color:var(--ebony);align-items:center;gap:10px;font-size:17px;font-weight:700;text-decoration:none;display:flex}.site-logo img{border-radius:7px;width:28px;height:28px}.site-nav{align-items:center;gap:20px;margin-left:auto;display:flex}.site-nav a{color:var(--ink-60);font-size:14.5px;font-weight:600;text-decoration:none}.site-nav a:hover{color:var(--ebony)}.site-nav .nav-cta{background:var(--yellow);color:var(--ebony);border-radius:999px;padding:8px 18px}.site-main{flex:1;width:100%;max-width:52rem;margin:0 auto;padding:28px 20px 64px}.site-narrow{max-width:42rem}.site h1{font-family:var(--display);letter-spacing:-.01em;margin:1rem 0 .9rem;font-size:clamp(2.1rem,6vw,3.2rem);font-weight:400;line-height:1.06}.site h2{font-family:var(--display);margin:2.6rem 0 .7rem;font-size:clamp(1.4rem,3.4vw,1.8rem);font-weight:400;line-height:1.15}.site p,.site li{color:var(--ink-60);font-size:15.5px;line-height:1.65}.site strong{color:var(--ebony)}.site-main a{color:var(--ebony);text-decoration-color:var(--orange);text-underline-offset:3px;text-decoration-thickness:2px}.eyebrow{letter-spacing:2px;color:var(--ink-40);text-transform:uppercase;font-size:11.5px;font-weight:700}.hero{text-align:center;padding-top:3rem}.hero .prompt-line{font-family:var(--display);min-height:1.2em;margin:.7rem 0 .2rem;font-size:clamp(2.4rem,7vw,4rem);line-height:1.05}.hero .prompt-sub{color:var(--ink-40);margin:0 0 1.6rem;font-size:15px}.hero-keys{max-width:44rem;height:clamp(120px,22vw,190px);margin:0 auto}.hero-feedback{min-height:26px;color:var(--ink-40);margin:14px 0 4px;font-size:15px;font-weight:600}.hero-feedback.good{color:var(--green,#2d6a4f)}@media (prefers-reduced-motion:no-preference){.hero-feedback.good{animation:.24s ease-out feedback-in}@keyframes feedback-in{0%{opacity:0;transform:translateY(4px)}}}.hero-actions{flex-wrap:wrap;justify-content:center;gap:12px;margin:1.2rem 0 .4rem;display:flex}.hero-note{color:var(--ink-40);font-size:13px}.cta-primary{background:var(--yellow);cursor:pointer;border:none;border-radius:999px;padding:13px 28px;font-size:15.5px;font-weight:700;display:inline-block;color:var(--ebony)!important;text-decoration:none!important}.cta-primary:hover{filter:brightness(.97)}.cta-secondary{cursor:pointer;background:0 0;border:1.5px solid #1b1b1f47;border-radius:999px;padding:13px 28px;font-size:15.5px;font-weight:600;display:inline-block;color:var(--ebony)!important;text-decoration:none!important}.how-rows{gap:1.1rem;margin:.8rem 0 0;padding:0;list-style:none;display:grid}.how-rows li{grid-template-columns:2.2rem 1fr;align-items:baseline;gap:12px;display:grid}.how-glyph{text-align:center;color:var(--ebony);font-family:TonicMusic;font-size:1.7rem;line-height:1}.ladder{border-left:3px solid var(--yellow);margin:1rem 0 0;padding:0;list-style:none}.ladder li{flex-wrap:wrap;align-items:baseline;gap:10px;padding:7px 0 7px 18px;display:flex}.ladder .ladder-name{color:var(--ebony);font-size:15.5px;font-weight:600}.ladder .ladder-levels{font-family:var(--mono);color:var(--ink-40);font-size:12px}.ladder .ladder-what{color:var(--ink-60);font-size:14px}.lesson-cards{grid-template-columns:repeat(auto-fit,minmax(14rem,1fr));gap:12px;margin-top:1rem;display:grid}.lesson-card{border:1px solid var(--hairline);background:#fff;border-radius:12px;padding:16px 18px;color:var(--ebony)!important;text-decoration:none!important}.lesson-card:hover{border-color:var(--orange)}.lesson-card b{margin-bottom:4px;font-size:15.5px;display:block}.lesson-card span{color:var(--ink-60);font-size:13.5px;line-height:1.5}.lesson-list{margin:.4rem 0 0;padding:0;list-style:none}.lesson-list a{border-radius:8px;align-items:baseline;gap:10px;padding:8px 10px;display:flex;color:var(--ebony)!important;text-decoration:none!important}.lesson-list a:hover{background:#ffd60a29}.lesson-list .lesson-name{white-space:nowrap;font-size:15px;font-weight:600}.lesson-list .lesson-tag{color:var(--ink-40);font-size:13px}.level-badge{text-align:center;min-width:36px;font-family:var(--mono);background:#ffd60a59;border-radius:6px;flex-shrink:0;padding:2px 7px;font-size:11px;font-weight:700}.lesson-figure{margin:1.6rem 0 .5rem;overflow-x:auto}.piano-box{max-width:32rem;height:130px}.figure-caption{font-style:italic;color:var(--ink-40)!important;font-size:13.5px!important}.formula{font-family:var(--mono);letter-spacing:.4px;color:var(--ebony);background:#1b1b1f0d;border-radius:8px;padding:9px 16px;font-size:13.5px;font-weight:600;display:inline-block}.lesson-nav{border-top:1px solid var(--hairline);justify-content:space-between;gap:12px;margin-top:3rem;padding-top:1.1rem;font-size:14.5px;display:flex}.course-table{border-collapse:collapse;width:100%;margin:.6rem 0 1rem;font-size:14.5px}.course-table td{border-bottom:1px solid var(--hairline);vertical-align:baseline;color:var(--ink-60);padding:7px 8px}.course-table a{font-weight:600}.site-footer{border-top:1px solid var(--hairline);width:100%;max-width:52rem;color:var(--ink-40);flex-wrap:wrap;gap:18px;margin:0 auto;padding:22px 20px 44px;font-size:13.5px;display:flex}.site-footer a{color:var(--ink-60)}