:root{
  --cream:#f5eddc;--paper:#fffaf0;--paper2:#fff6e5;--ink:#302821;--muted:#6f6256;
  --teal:#2e7774;--teal2:#d8ebe7;--orange:#d78631;--orange2:#f6dfbb;--coral:#b85b43;
  --olive:#6d7650;--line:#ddceb3;--shadow:0 16px 40px rgba(71,49,28,.10);
  --radius:24px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;background:var(--cream);color:var(--ink);line-height:1.55}
button,input,select{font:inherit}button{cursor:pointer}a{color:inherit}
.site-header{position:sticky;top:0;z-index:50;display:flex;align-items:center;justify-content:space-between;gap:24px;padding:14px clamp(18px,4vw,52px);background:rgba(255,250,240,.94);backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;font-weight:900}.brand-mark{display:grid;place-items:center;width:38px;height:38px;border-radius:50%;background:var(--teal);color:white;font-size:1.2rem}
nav{display:flex;gap:20px}nav a{text-decoration:none;font-weight:800;color:var(--muted)}nav a:hover{color:var(--teal)}
.hero{max-width:1260px;margin:auto;padding:64px clamp(18px,4vw,52px) 40px;display:grid;grid-template-columns:1.02fr .98fr;gap:52px;align-items:center}
.eyebrow{margin:0 0 8px;text-transform:uppercase;letter-spacing:.11em;font-size:.78rem;font-weight:900;color:var(--teal)}
h1,h2,h3{font-family:Georgia,"Times New Roman",serif;line-height:1.06}h1{font-size:clamp(3rem,7vw,6.2rem);margin:.08em 0 .18em;max-width:850px}h2{font-size:clamp(2.25rem,5vw,4.1rem);margin:.1em 0 .25em}h3{font-size:1.48rem;margin:.15em 0 .55em}.lede{font-size:clamp(1.08rem,2vw,1.35rem);max-width:680px;color:var(--muted)}
.hero-actions,.inline-actions{display:flex;gap:10px;flex-wrap:wrap}.hero-actions{margin:28px 0 30px}.button{border:0;border-radius:14px;padding:13px 18px;font-weight:900;text-decoration:none;display:inline-flex;align-items:center;justify-content:center}.button.primary{background:var(--teal);color:white}.button.secondary{background:var(--orange2);color:var(--ink);border:1px solid #e4bf83}.button.small{padding:10px 13px;border-radius:11px}
.hero-art{margin:0;background:var(--paper);padding:12px;border-radius:28px;box-shadow:var(--shadow);transform:rotate(1deg)}.hero-art img{width:100%;display:block;border-radius:19px}.hero-art figcaption{padding:11px 8px 5px;text-align:center;color:var(--muted);font-size:.92rem;font-weight:700}
.progress-summary{display:flex;gap:28px;flex-wrap:wrap}.progress-summary div{display:flex;flex-direction:column}.progress-summary strong{font-size:1.45rem}.progress-summary span{font-size:.82rem;color:var(--muted);font-weight:700}
.section{padding:76px clamp(18px,4vw,52px);max-width:1260px;margin:auto}.section-heading{max-width:820px;margin-bottom:32px}.section-heading>p:last-child{font-size:1.08rem;color:var(--muted)}
.room-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}.room-card{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:0 8px 24px rgba(71,49,28,.06);display:flex;flex-direction:column}.room-card img{width:100%;aspect-ratio:16/10;object-fit:cover;object-position:center 32%}.room-body{padding:20px;display:flex;flex:1;flex-direction:column}.room-num{display:flex;align-items:center;justify-content:space-between;gap:8px;font-size:.78rem;text-transform:uppercase;letter-spacing:.08em;font-weight:900;color:var(--coral)}.status-chip{font-size:.73rem;text-transform:none;letter-spacing:0;border-radius:999px;padding:5px 9px;background:#eee4d2;color:var(--muted)}.status-chip.confident{background:var(--teal2);color:#225d5a}.status-chip.practising{background:var(--orange2);color:#87531d}.room-card h3{font-size:1.55rem}.room-card p{color:var(--muted);margin-top:0}.room-card .button{margin-top:auto;width:100%}
.lesson-shell{padding-top:42px}.lesson-topbar{display:flex;justify-content:space-between;align-items:center;margin-bottom:18px}.text-button{border:0;background:none;padding:8px 0;font-weight:900;color:var(--teal)}.lesson-status{font-size:.8rem;font-weight:900;padding:7px 11px;border-radius:999px;background:var(--teal2);color:#235e5b}
.lesson-hero{display:grid;grid-template-columns:.95fr 1.05fr;gap:26px;align-items:stretch;margin-bottom:24px}.lesson-art{background:var(--paper);padding:10px;border:1px solid var(--line);border-radius:24px}.lesson-art img{display:block;width:100%;height:100%;max-height:520px;object-fit:cover;border-radius:16px}.lesson-intro{background:var(--paper);border:1px solid var(--line);border-radius:24px;padding:28px;display:flex;flex-direction:column;justify-content:center}.chapter-label{font-size:.82rem;font-weight:900;color:var(--coral);text-transform:uppercase;letter-spacing:.08em}.lesson-intro p{color:var(--muted);font-size:1.06rem}.concept-box{background:var(--orange2);border-radius:16px;padding:14px 16px;margin-top:8px;font-weight:800}
.mode-tabs{display:flex;gap:8px;flex-wrap:wrap;margin:18px 0}.mode-tab{border:1px solid var(--line);background:var(--paper);padding:10px 14px;border-radius:999px;font-weight:900}.mode-tab.active{background:var(--teal);color:#fff;border-color:var(--teal)}.mode-panel{background:var(--paper);border:1px solid var(--line);border-radius:24px;padding:26px;min-height:300px}.mode-panel p{max-width:780px}.hear-card,.practice-card{background:var(--paper2);border:1px dashed #d3b885;border-radius:18px;padding:18px;margin-top:14px}.large-action{font-size:1.15rem;padding:16px 22px}.feedback{font-weight:800;color:var(--teal);min-height:1.6em}.choice-row{display:flex;gap:10px;flex-wrap:wrap;margin:14px 0}.choice{min-width:74px;min-height:52px;border:2px solid var(--line);border-radius:14px;background:#fff;font-weight:900;font-size:1.05rem}.choice:hover,.choice.selected{border-color:var(--teal);background:var(--teal2)}
.tap-pad{display:grid;place-items:center;width:min(260px,75vw);aspect-ratio:1;border-radius:50%;border:0;background:var(--orange);color:white;font-size:1.8rem;font-weight:900;margin:22px auto;box-shadow:0 10px 0 #ac6728}.tap-pad:active{transform:translateY(5px);box-shadow:0 5px 0 #ac6728}.meter{height:14px;background:#e6dac6;border-radius:999px;overflow:hidden;max-width:520px}.meter>div{height:100%;background:var(--teal);width:0;transition:width .25s}
.pulse-dots{display:flex;gap:12px;margin:20px 0;flex-wrap:wrap}.pulse-dot{width:34px;height:34px;border-radius:50%;background:#e8ddc9;border:2px solid #d2c1a5}.pulse-dot.on{background:var(--orange);border-color:#b66d28;transform:scale(1.12)}
.staff-game{background:#fff;border-radius:18px;padding:16px;overflow:auto}.staff-svg{width:100%;min-width:520px;height:auto}.staff-note{fill:var(--teal)}
.piano{display:flex;align-items:flex-start;max-width:680px;overflow:auto;padding-bottom:8px}.piano-key{position:relative;border:1px solid #6a5b4b;background:#fff;width:68px;height:210px;flex:0 0 68px;border-radius:0 0 9px 9px;display:flex;align-items:flex-end;justify-content:center;padding-bottom:12px;font-weight:900}.piano-key.black{background:#332d29;color:#fff;height:132px;width:46px;flex-basis:46px;margin:0 -23px;z-index:2;border-radius:0 0 7px 7px;padding-bottom:8px}.piano-key.active{background:var(--orange2)}.piano-key.black.active{background:var(--teal)}
.triad-notes{display:flex;gap:12px;flex-wrap:wrap}.triad-note{width:58px;height:58px;border-radius:50%;border:2px solid var(--line);background:white;font-weight:900;font-size:1.2rem}.triad-note.selected{background:var(--teal);color:white;border-color:var(--teal)}
.maker-layout{display:grid;grid-template-columns:280px 1fr;gap:20px}.maker-tools{display:flex;flex-direction:column;gap:16px}.tool-card,.composer-card,.dashboard-card{background:var(--paper);border:1px solid var(--line);border-radius:22px;padding:20px}.unlock-list{display:flex;flex-direction:column;gap:9px}.unlock-row{display:flex;align-items:center;gap:10px;font-size:.92rem}.unlock-icon{width:28px;height:28px;border-radius:50%;display:grid;place-items:center;background:#ebe1ce;font-weight:900}.unlock-row.on .unlock-icon{background:var(--teal);color:white}.tool-card input[type=range]{width:100%}.composer-head{display:flex;justify-content:space-between;gap:16px;align-items:start}.hint{font-size:.82rem;color:var(--muted);font-weight:700}.composer-grid{display:grid;grid-template-columns:repeat(8,1fr);gap:7px;margin:18px 0}.beat-cell{aspect-ratio:1/1.15;border:2px solid var(--line);border-radius:13px;background:#fff;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;font-weight:900;min-width:0}.beat-cell.current{outline:4px solid var(--orange2);border-color:var(--orange)}.beat-cell .beat-n{font-size:.7rem;color:var(--muted)}.beat-cell .note-n{font-size:1.25rem}.composer-notes{display:flex;gap:8px;flex-wrap:wrap}.note-button{width:46px;height:46px;border-radius:50%;border:0;background:var(--teal2);font-weight:900}.note-button.rest{border-radius:12px;background:#ece4d5}.note-button.active{background:var(--teal);color:#fff}
.grownup-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:20px}.progress-row{display:grid;grid-template-columns:1fr auto;gap:10px;align-items:center;padding:10px 0;border-bottom:1px solid var(--line)}.progress-row:last-child{border:0}.progress-row small{display:block;color:var(--muted)}.grownup-steps{padding-left:22px}.grownup-steps li{margin-bottom:10px}
footer{display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;padding:30px clamp(18px,4vw,52px);background:var(--paper);border-top:1px solid var(--line);color:var(--muted)}
@media (max-width:920px){.hero,.lesson-hero,.maker-layout,.grownup-grid{grid-template-columns:1fr}.room-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.hero-art{max-width:650px}.maker-tools{display:grid;grid-template-columns:1fr 1fr}.composer-grid{grid-template-columns:repeat(4,1fr)}}
@media (max-width:620px){.site-header nav{display:none}.hero{padding-top:36px}.room-grid{grid-template-columns:1fr}.maker-tools{grid-template-columns:1fr}.composer-head{display:block}.composer-grid{grid-template-columns:repeat(4,1fr)}.progress-summary{gap:18px}.mode-panel{padding:18px}.lesson-intro{padding:21px}}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}}

/* Multi-page refinements */
html{scroll-behavior:auto}
.site-header nav a.active{color:var(--teal);position:relative}
.site-header nav a.active::after{content:"";position:absolute;left:0;right:0;bottom:-7px;height:3px;border-radius:999px;background:var(--orange)}
.page-hero{max-width:1260px;margin:auto;padding:62px clamp(18px,4vw,52px) 18px}
.page-hero.compact{padding-bottom:4px}.page-hero p{max-width:760px;color:var(--muted);font-size:1.08rem}
.page-hero h1{font-size:clamp(2.8rem,6vw,5.5rem)}
.home-room-section{padding-top:34px}.section-actions{display:flex;justify-content:center;margin-top:28px}
.lesson-page{padding-top:30px}.lesson-title{font-size:clamp(2.6rem,5vw,4.8rem);margin:.12em 0 .22em}
.breadcrumbs{display:flex;gap:8px;flex-wrap:wrap;color:var(--muted);font-size:.88rem;font-weight:800;margin:0 0 20px}.breadcrumbs a{text-decoration:none;color:var(--teal)}
.chapter-nav{display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:14px;margin-top:20px}.chapter-nav>a:last-child{justify-self:end}.chapter-nav .text-link{font-weight:900;color:var(--teal);text-decoration:none}
.nav-home{display:none}
.intro-card-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}.intro-card{background:var(--paper);border:1px solid var(--line);border-radius:22px;padding:22px}.intro-card .big-icon{font-size:2rem}.intro-card p{color:var(--muted)}
@media(max-width:720px){
  .site-header{align-items:flex-start;flex-direction:column;gap:10px}.site-header nav{display:flex!important;width:100%;gap:8px;overflow-x:auto;padding-bottom:4px}.site-header nav a{white-space:nowrap;background:#f3ead9;padding:8px 10px;border-radius:10px;font-size:.87rem}.site-header nav a.active::after{display:none}.brand-mark{width:34px;height:34px}.chapter-nav{grid-template-columns:1fr 1fr}.chapter-nav .text-link{grid-column:1/-1;grid-row:1;text-align:center}.chapter-nav>a:last-child{justify-self:stretch}.chapter-nav>a:first-child{justify-self:stretch}.intro-card-grid{grid-template-columns:1fr}.page-hero{padding-top:38px}
}

/* Music House interactive keyboard */
.keyboard-hero{max-width:1000px}.keyboard-section{max-width:1100px}.keyboard-card{background:var(--paper);border:1px solid var(--line);border-radius:28px;padding:clamp(18px,4vw,34px);box-shadow:var(--shadow)}
.mastery-card{margin-top:16px}.signature-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;margin:14px 0}.signature-grid>div{display:flex;flex-direction:column;gap:4px;padding:13px;border:1px solid var(--line);border-radius:14px;background:var(--paper)}.signature-grid span{color:var(--muted);font-size:.92rem}
.keyboard-mode-tabs{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:24px}
.piano-console{max-width:960px;margin:0 auto 16px;padding:18px 18px 20px;border:1px solid #11100f;border-radius:22px;background:linear-gradient(180deg,#373432 0%,#242220 55%,#181715 100%);box-shadow:0 18px 34px rgba(34,28,22,.24),inset 0 1px 0 rgba(255,255,255,.08);color:#f7f1e8}
.piano-console-head{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:0 4px 12px;border-bottom:1px solid rgba(255,255,255,.12);letter-spacing:.04em}.piano-wordmark{font-weight:900}.piano-model{font-size:.78rem;text-transform:uppercase;color:#cfc5b8;letter-spacing:.13em}
.piano-fullscreen-button{min-height:44px;padding:7px 15px;border:1px solid #dfc9a7;border-radius:10px;background:#ede0ca;color:#221e19;font-weight:800;white-space:nowrap}.piano-fullscreen-button:focus-visible{outline:3px solid #fff;outline-offset:3px}
.keyboard-controls{margin:14px auto 8px;display:grid;grid-template-columns:1fr 1fr;gap:18px;align-items:center}.volume-control{display:grid;grid-template-columns:1fr auto;gap:6px 14px;align-items:center}.volume-control input{grid-column:1/-1;width:100%;min-height:32px;accent-color:var(--orange2)}.sustain-control{display:flex;gap:12px;align-items:center;min-height:48px}.sustain-control input{width:24px;height:24px;accent-color:var(--orange2)}.sustain-control small{display:block;color:#cfc5b8;margin-top:3px}.volume-note{margin:6px 0 14px;color:#cfc5b8;font-size:.86rem}.keyboard-help{max-width:920px;margin:9px auto 12px;color:var(--ink);font-weight:700;font-size:.9rem}
.piano-keybed{padding:0 8px 10px;border:1px solid #0b0a09;border-radius:12px;background:#11100f;box-shadow:inset 0 2px 8px rgba(0,0,0,.65),0 2px 0 rgba(255,255,255,.08)}.piano-felt{height:7px;margin:0 -1px 1px;background:linear-gradient(180deg,#a34642,#742b29);box-shadow:0 1px 2px rgba(0,0,0,.55)}
.interactive-keyboard{position:relative;width:100%;margin:0;height:300px;user-select:none;-webkit-user-select:none;touch-action:none;--white-count:8;--black-width:7.25%}.keyboard-whites{display:grid;grid-template-columns:repeat(var(--white-count),minmax(0,1fr));height:100%}.music-key{font:inherit;cursor:pointer;transition:transform .08s,background .12s,box-shadow .12s;touch-action:none;-webkit-user-select:none;user-select:none}.white-key{min-width:0;border:1px solid #8b8176;border-right-width:0;background:linear-gradient(90deg,#fffdfa 0%,#f5efe7 78%,#e8dfd4 100%);color:#3c342d;display:flex;align-items:flex-end;justify-content:center;padding:0 0 15px;font-weight:900;font-size:.96rem;border-radius:0 0 5px 5px;box-shadow:inset 0 -8px 12px rgba(117,96,72,.08)}.white-key:last-child{border-right-width:1px}.white-key span{display:inline-flex;align-items:center;justify-content:center;min-width:24px;height:24px;padding:0 5px;border-radius:999px;background:rgba(255,255,255,.76);box-shadow:0 1px 2px rgba(57,48,39,.12)}
.black-key{position:absolute;top:0;transform:translateX(-50%);width:var(--black-width);height:62%;background:linear-gradient(90deg,#121110 0%,#3a3734 48%,#151412 100%);color:#f8f3eb;border:1px solid #090807;border-radius:0 0 6px 6px;z-index:3;display:flex;align-items:flex-end;justify-content:center;padding:0 0 10px;font-size:.7rem;font-weight:900;box-shadow:0 5px 8px rgba(0,0,0,.52),inset 0 -7px 9px rgba(255,255,255,.035)}.black-key span{opacity:.82}
.music-key.pressed{transform:translateY(3px);background:var(--orange2)}.black-key.pressed{transform:translateX(-50%) translateY(3px);background:var(--teal)}.music-key.selected{box-shadow:inset 0 0 0 5px var(--teal);background:var(--teal2);color:var(--ink)}.black-key.selected{background:var(--teal);color:#fff;box-shadow:inset 0 0 0 3px #fff,0 5px 8px rgba(0,0,0,.45)}
.keyboard-feedback{min-height:2em;text-align:center;font-size:1.08rem;font-weight:900;color:var(--teal);margin:14px auto 20px}.keyboard-feedback.good{color:#246447}.keyboard-game-controls{max-width:780px;margin:0 auto;background:var(--paper2);border:1px dashed #d3b885;border-radius:18px;padding:18px}.keyboard-game-controls p{margin-top:0}.keyboard-game-controls .inline-actions{justify-content:center}
.piano-console .keyboard-feedback{color:#f5e9cf;margin:10px 0 0;min-height:1.5em}.piano-console .keyboard-feedback.good{color:#bce9ba}
body.keyboard-immersive{overflow:hidden}.piano-console.immersive{position:fixed;inset:0;z-index:1000;width:100%;height:100vh;height:100dvh;max-width:none;margin:0;padding:max(8px,env(safe-area-inset-top)) max(10px,env(safe-area-inset-right)) max(8px,env(safe-area-inset-bottom)) max(10px,env(safe-area-inset-left));border-radius:0;display:flex;flex-direction:column;overflow:hidden}.piano-console.immersive .piano-console-head{flex:none;min-height:42px;padding-bottom:4px}.piano-console.immersive .keyboard-controls{flex:none;margin:5px 0;gap:8px}.piano-console.immersive .sustain-control small,.piano-console.immersive .piano-model,.piano-console.immersive .volume-note{display:none}.piano-console.immersive .piano-keybed{display:flex;flex:1;flex-direction:column;min-height:0}.piano-console.immersive .piano-felt{flex:none}.piano-console.immersive .interactive-keyboard{flex:1;height:auto;min-height:0}.piano-console.immersive .keyboard-feedback{flex:none;margin:3px 0 0;font-size:.86rem;min-height:1.3em}
@media(max-width:720px){.piano-console{padding:14px 12px 14px}.interactive-keyboard{height:230px}.white-key{font-size:.84rem;padding-bottom:11px}.white-key span{min-width:21px;height:21px;padding:0 4px}.black-key{height:62%;font-size:.62rem;padding-bottom:8px}.keyboard-mode-tabs{display:grid;grid-template-columns:1fr 1fr}.keyboard-mode-tabs .mode-tab:last-child{grid-column:1/-1}}
@media(max-width:520px){.keyboard-controls{grid-template-columns:1fr;gap:8px}.volume-control input{min-height:40px}.signature-grid{grid-template-columns:1fr}.piano-console-head{align-items:flex-start;flex-direction:column;gap:4px}}
@media(max-width:430px){.interactive-keyboard{height:205px}.white-key{font-size:.78rem}.black-key span{display:none}.keyboard-card{padding:14px}.keyboard-mode-tabs{grid-template-columns:1fr}.piano-keybed{padding-left:5px;padding-right:5px}}
@media(orientation:landscape) and (max-height:520px){.interactive-keyboard{height:210px}.piano-console{padding-top:12px}.keyboard-controls{margin-top:10px}.piano-console-head{padding-bottom:8px}.white-key span{font-size:.72rem;min-width:20px;height:20px}.black-key span{font-size:.56rem}}
@media(orientation:landscape) and (max-height:520px){.piano-console.immersive .piano-console-head{flex-direction:row;align-items:center}.piano-console.immersive .keyboard-controls{grid-template-columns:minmax(0,1fr) minmax(0,1fr)}.piano-console.immersive .piano-fullscreen-button{min-height:38px}.piano-console.immersive .volume-control input{min-height:24px}}