:root{--paper:#f7f4eb;--ink:#263d33;--green:#234c3e;--muted:#667168;--line:#d9dccd;--orange:#b75e3e}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:24px}body{margin:0;background:var(--paper);color:var(--ink);font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;line-height:1.65}header,main,footer{max-width:1160px;margin:auto}header{padding:28px 32px;display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid var(--line)}a{color:inherit}button,input{font:inherit}button,a,input{-webkit-tap-highlight-color:transparent}button{cursor:pointer}button:focus-visible,a:focus-visible,input:focus-visible,summary:focus-visible{outline:3px solid var(--orange);outline-offset:5px}.brand{font-family:Georgia,serif;font-size:25px;font-weight:bold;text-decoration:none;letter-spacing:-1px}.brand span{display:block;font:9px system-ui;letter-spacing:2.5px;margin-top:2px}.header-note,.small{font-size:12px;color:var(--muted)}main{padding:0 32px}.hero{display:grid;grid-template-columns:1.2fr 1fr;gap:48px;align-items:center;padding:58px 0 50px}.eyebrow{font-size:10px;letter-spacing:2px;font-weight:750;margin:0 0 18px}h1{font:76px/.99 Georgia,serif;letter-spacing:-3px;margin:0 0 24px}h1 em{color:var(--orange);font-weight:normal}.intro{max-width:415px;color:var(--muted);font-size:16px}.primary,.complete,#metro-toggle{display:inline-flex;align-items:center;justify-content:center;gap:32px;background:var(--green);color:white;padding:13px 22px;text-decoration:none;border:1px solid var(--green);border-radius:5px;font-size:14px;font-weight:650}.primary{margin-top:12px}.hero-art{position:relative;text-align:center}.hero-art svg{display:block;width:100%;max-height:435px}.hero-art span{font-size:9px;letter-spacing:3px}.journey{display:flex;gap:30px;align-items:center;background:#e8ecdf;padding:22px 28px;border:1px solid #d7decc;border-radius:7px}.journey .eyebrow{margin:0;font-size:9px}.journey p{margin:3px 0;font-size:13px}.journey progress{flex:1;min-width:40px;height:7px;border:0;border-radius:10px;overflow:hidden;accent-color:var(--green);background:#cdd6c4}progress::-webkit-progress-bar{background:#cdd6c4}progress::-webkit-progress-value{background:var(--green)}progress::-moz-progress-bar{background:var(--green)}#progress-percent{font:24px Georgia,serif}.course{display:grid;grid-template-columns:235px minmax(0,1fr);gap:48px;padding:48px 0 64px}.course nav{align-self:start;position:sticky;top:24px}.course nav ol{list-style:none;padding:0;margin:0}.course nav a{display:flex;align-items:center;gap:12px;text-decoration:none;font-size:13px;padding:12px 0;border-bottom:1px solid var(--line)}.nav-number{display:grid;place-items:center;width:25px;height:25px;flex-shrink:0;border:1px solid var(--line);border-radius:50%;font-size:10px}.done .nav-number{background:var(--green);color:white}.nav-tip{font:italic 18px/1.5 Georgia,serif;color:var(--muted);margin-top:30px;max-width:190px}.lesson{border:1px solid var(--line);border-radius:7px;margin-bottom:16px;background:#fffdf7;overflow:hidden;scroll-margin-top:24px}.lesson summary{list-style:none;cursor:pointer;display:flex;align-items:center;gap:16px;padding:23px}.lesson summary::-webkit-details-marker{display:none}.lesson summary::after{content:'+';margin-left:auto;font-size:24px;font-weight:300}.lesson[open] summary::after{content:'−'}.lesson-number{font:italic 26px Georgia,serif;color:var(--orange)}h2{font:25px Georgia,serif;margin:0}.lesson-meta{display:block;font-size:10px;letter-spacing:1px;color:var(--muted);margin-bottom:4px}.lesson-body{padding:0 24px 24px;border-top:1px solid transparent}.lesson-body>p{margin-top:0;color:var(--muted)}h3{font-size:13px;margin:22px 0 8px}.lesson-body ol{padding-left:22px;font-size:14px}.lesson-body li{padding:3px 0}.exercise{background:#eef0e5;border-left:3px solid #849b65;padding:15px 18px;margin:22px 0;font-size:14px}.exercise strong{display:block;font-size:10px;letter-spacing:1.5px;margin-bottom:4px}.complete{gap:10px;padding:10px 18px}.complete[aria-pressed=true]{background:#e8ecdf;color:var(--green)}.chords{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}.chord{margin:0;text-align:center;background:var(--paper);border-radius:6px;padding:12px 4px}.chord figcaption{font-weight:650;font-size:13px}.chord svg{width:100%;max-width:155px;display:block;margin:auto}.chord small{font-size:11px;color:var(--muted)}.legend{font-size:12px!important}.pattern{display:grid;grid-template-columns:repeat(8,1fr);text-align:center;border:1px solid var(--line);border-radius:5px;overflow:hidden;margin:16px 0}.pattern>span{padding:8px 2px;border-right:1px solid var(--line);font-size:12px}.pattern>span:last-child{border:0}.pattern b{display:block;font-size:27px;color:var(--orange)}.pattern small{display:block;font-size:10px}.pattern.zamba{grid-template-columns:repeat(6,1fr)}.accent{background:#e8ecdf}.metro{background:var(--paper);border:1px solid var(--line);padding:20px;border-radius:6px}.metro label{display:flex;align-items:center;justify-content:space-between;font-size:13px}.metro output{font-size:24px;font-family:Georgia,serif}.metro input{display:block;width:100%;margin:20px 0;accent-color:var(--green);min-height:28px}.beats{display:flex;gap:12px;margin-bottom:18px}.beat{width:15px;height:15px;border:1px solid #7c9077;border-radius:50%}.beat.active{background:var(--orange);border-color:var(--orange)}.notice:empty,.audio-status:empty{display:none}.notice,.audio-status{font-size:13px;color:var(--orange)}footer{padding:26px 32px;border-top:1px solid var(--line);display:flex;justify-content:space-between;align-items:center}footer .brand{font-size:19px}footer p{font-size:11px;color:var(--muted)}.skip{position:absolute;left:12px;top:-100px;background:white;padding:10px;z-index:10}.skip:focus{top:10px}@media(max-width:760px){header{padding:20px}.header-note{display:none}main{padding:0 20px}.hero{gap:12px;padding:36px 0;grid-template-columns:1.4fr 1fr}h1{font-size:53px}.intro{font-size:14px}.hero-art svg{height:280px}.hero-art span{font-size:7px;letter-spacing:1px}.small{font-size:10px}.journey{padding:18px;gap:16px}.course{grid-template-columns:1fr;gap:26px;padding-top:30px}.course nav{position:static}.course nav ol{display:grid;grid-template-columns:1fr 1fr;gap:0 20px}.nav-tip{display:none}.course nav .eyebrow{margin-bottom:8px}.lesson summary{padding:20px 16px}h2{font-size:22px}.lesson-body{padding:0 16px 20px}.journey p{font-size:11px}footer{display:block;padding:22px 20px}.chords{gap:6px}.chord figcaption{font-size:12px}}@media(max-width:430px){.hero{grid-template-columns:1fr;position:relative}.hero>div:first-child{z-index:1}.hero-art{position:absolute;right:-10px;top:22px;width:155px;opacity:.22;pointer-events:none}.hero-art span{display:none}.intro{max-width:290px}h1{font-size:64px}.journey{gap:12px}.journey>div{max-width:150px}.course nav a{font-size:11px;gap:8px}.pattern small{font-size:9px}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}

/* El curso conserva la paleta y la tipografía originales. */
[hidden]{display:none!important}body{padding-bottom:85px}button{background:var(--paper);color:var(--green);border:1px solid var(--line);border-radius:5px;padding:10px 14px;min-height:44px}button:disabled{opacity:.5;cursor:default}select{font:inherit;max-width:100%;min-height:44px;background:#fffdf7;color:var(--ink);border:1px solid var(--line);border-radius:4px;padding:6px}select:focus-visible{outline:3px solid var(--orange);outline-offset:3px}.practice-note{margin-top:28px;max-width:730px}.practice-note h2{font-size:23px}.practice-note p{font-size:14px;color:var(--muted)}.level{margin-bottom:48px;scroll-margin-top:24px}.level>.eyebrow{margin-bottom:7px}.level>h2{font-size:34px}.level>p:not(.eyebrow){font-size:14px;color:var(--muted)}.level-status{font-weight:650}.lock-message{padding:16px 20px;border:1px dashed #9da88e;border-radius:7px;background:#eef0e5;font-size:14px}.nav-status{display:block;color:var(--muted);font-size:10px}.lesson summary h3{font:23px Georgia,serif;margin:0}.lesson-body h4{font-size:14px;margin:22px 0 8px}.lesson-body p,.lesson-body ul{font-size:14px}.lesson-body>p{margin-top:12px}.exercise button{margin:4px 6px 0 0}.chords{grid-template-columns:repeat(auto-fit,minmax(130px,1fr))}.chord{max-width:220px}.milestones{padding:22px 0 0}.milestones>.eyebrow{margin-bottom:8px}.milestones>h3{font:26px Georgia,serif;margin:0 0 16px}.song{border:1px solid var(--line);background:#e8ecdf;border-radius:7px;margin:14px 0}.song>summary{cursor:pointer;padding:18px;list-style:none}.song>summary::-webkit-details-marker{display:none}.song>summary::after{content:'Abrir ficha +';font-size:11px;color:var(--green)}.song[open]>summary::after{content:'Cerrar ficha −'}.song summary h3{font:24px Georgia,serif;margin:0 0 6px}.song-body{padding:0 20px 22px;font-size:14px}.song-body dt{font-weight:700;margin-top:15px}.song-body dd{margin:5px 0 0;background:#fffdf7;padding:12px;border-radius:4px;font-family:ui-monospace,monospace;line-height:1.9;overflow-wrap:anywhere}.toolbox{position:fixed;bottom:0;left:0;right:0;z-index:20;background:var(--paper);border-top:1px solid #9da88e;box-shadow:0 -4px 18px #263d3312;max-height:80dvh;overflow:auto;padding-bottom:env(safe-area-inset-bottom)}.toolbox>details{max-width:1096px;margin:auto}.toolbox summary{cursor:pointer;padding:16px 20px;font-size:14px;font-weight:700;min-height:56px}.toolbox summary span{font-size:11px;font-weight:400;color:var(--muted)}.tool-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px;padding:0 20px 20px}.tool-grid h2{font-size:24px;margin:0 0 14px}.tool-grid p{font-size:13px}.tool-grid .metro{padding:16px}.tool-grid .metro input{margin:8px 0}.tool-grid .metro label{flex-wrap:wrap;gap:8px}.beats{margin:14px 0}.change-tool{padding:16px;background:#eef0e5;border-radius:6px}.change-tool label{display:block;font-size:13px}.change-tool select{width:100%}.change-tool output{font-weight:700;font-variant-numeric:tabular-nums}.tool-actions{display:flex;gap:8px;flex-wrap:wrap}#change-add{background:var(--green);color:white}.tool-actions button{flex:1}.legend{color:var(--muted)}
@media(max-width:760px){.tool-grid{grid-template-columns:1fr;gap:12px}.course nav ol{grid-template-columns:repeat(2,minmax(0,1fr))}.toolbox summary span{display:block}.level>h2{font-size:29px}.lesson summary h3{font-size:21px}.toolbox{max-height:75dvh}.chords{grid-template-columns:repeat(2,minmax(0,1fr))}.toolbox>details[open]{padding-bottom:12px}}

.extras{padding:36px 0 10px}.extras h2{font:34px/1.1 Georgia,serif;margin:0 0 8px}.streak-line{color:var(--muted);margin:0 0 16px}
.extra{border:1px solid var(--line);border-radius:8px;background:#fbfaf4;margin:0 0 10px;padding:0 18px}.extra>summary{cursor:pointer;padding:16px 0;font-weight:700}.extra>summary small{display:block;font-weight:400;color:var(--muted)}.extra[open]{padding-bottom:18px}
.extra label{display:block;margin:12px 0 4px;font-size:14px}.extra label.check{display:flex;gap:8px;align-items:center}.extra input[type=range],.extra input[type=search],.extra select{width:100%;max-width:420px}.extra input[type=search]{padding:10px;border:1px solid var(--line);border-radius:5px;min-height:44px;margin-bottom:12px}
.play-stage{text-align:center;background:#eef0e5;border-radius:8px;padding:16px;margin:14px 0}#play-section{margin:0;color:var(--muted);font-size:13px}#play-now{font:72px/1.1 Georgia,serif;color:var(--green);margin:6px 0}#play-next{margin:0 0 8px;color:var(--orange);min-height:1.6em}
.play-stage .beats{display:flex;justify-content:center;gap:8px;margin:6px 0 10px}.play-stage .beats span{width:14px;height:14px;border-radius:50%;border:2px solid var(--green)}.play-stage .beats span.active{background:var(--green)}
#play-diagram,#quiz-diagram{grid-template-columns:minmax(0,180px);justify-content:center}
.quiz-options{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px;margin-top:12px}#quiz-score{font-weight:700;margin:12px 0 0}
.routine{padding-left:20px}.routine li{margin:0 0 10px;padding:8px 10px;border-radius:6px}.routine li span{font-size:13px;color:var(--muted)}.routine li.active{background:#eef0e5;border-left:3px solid var(--orange)}.routine li.done{opacity:.5}
.badges{list-style:none;padding:0;display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:10px}.badges li{border:1px solid var(--line);border-radius:8px;padding:12px;text-align:center;filter:grayscale(1);opacity:.55}.badges li.got{filter:none;opacity:1;background:#eef0e5}.badges span{font-size:30px;display:block}.badges b,.badges small{display:block}.badges small{color:var(--muted);font-size:12px}
#library{grid-template-columns:repeat(auto-fill,minmax(120px,1fr))}
@media(max-width:760px){#play-now{font-size:56px}.quiz-options{grid-template-columns:1fr}}