.sr-only{position:absolute;width:1px;height:1px;padding:0;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.tool-help{display:grid;grid-template-columns:1.5fr 1fr;gap:50px;margin:55px 0 65px}.tool-help h2{font-size:2rem;margin:12px 0 16px}.tool-help .button{margin-top:24px}.tool-help aside{background:#edf1e9;padding:28px;border-radius:20px}.tool-help aside h3{font-size:1.2rem;margin-bottom:14px}.tool-help aside p,.tool-help aside a{font-size:.95rem}.tool-help aside a{display:inline-block;margin-top:18px}.metronome{max-width:520px;text-align:center;margin:auto}.tempo-display{display:flex;flex-direction:column;align-items:center}.tempo-display output{font-size:6.5rem;font-weight:750;line-height:1.1;letter-spacing:-.07em;font-variant-numeric:tabular-nums}.tempo-display>span{font-size:.76rem;font-weight:700;letter-spacing:.12em;color:var(--muted)}.tempo-controls{display:flex;justify-content:center;align-items:center;gap:15px;margin:25px 0 16px}.small-button{width:48px;height:48px;border:1px solid var(--line);border-radius:50%;background:white;font-size:1.5rem}.tempo-controls input{width:85px;text-align:center;padding:8px;border:1px solid #85958d;border-radius:10px}.metronome>input[type=range]{width:100%;accent-color:#526723;min-height:36px}.tempo-labels{display:flex;justify-content:space-between;font-size:.83rem;color:var(--muted)}select{color:var(--ink);background:#fff;border:1px solid #85958d;border-radius:10px;padding:10px;max-width:100%;min-height:45px}.group-control{display:flex;gap:15px;align-items:center;justify-content:center;margin-top:24px}.beat-dots{display:flex;justify-content:center;gap:12px;margin:28px 0}.beat-dots span{width:42px;height:42px;display:grid;place-items:center;border:1px solid var(--line);background:var(--paper);border-radius:50%;font-size:.95rem;font-weight:600}.beat-dots .active{background:var(--ink);color:white}.beat-dots .active:first-child{background:var(--lime);color:var(--ink);border-color:#6e8421}.metronome .volume,.quiz-app .volume{justify-content:center;margin:24px 0 0}.quiz-app{text-align:center}.quiz-top{display:flex;justify-content:space-between;gap:18px;align-items:center;text-align:left;flex-wrap:wrap}.quiz-top label{display:flex;align-items:center;gap:12px;font-size:.9rem}.score{background:#edf1e9;border-radius:100px;padding:7px 14px;font-weight:600;font-size:.9rem;white-space:nowrap}.listen-pair{display:flex;align-items:center;justify-content:center;gap:24px;margin:40px 0 26px}.listen-pair>span:not(.pair-arrow){display:grid;place-items:center;width:75px;height:75px;border:1px solid #bdcabb;border-radius:24px;background:#f3f7e9;font:italic 2.4rem Georgia,serif}.pair-arrow{font-size:2rem;color:var(--muted)}.quiz-question{font-size:1.65rem;letter-spacing:-.035em}.quiz-caption{color:var(--muted);font-size:.95rem;margin:12px 0 24px}.answers{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin:25px auto;max-width:630px}.answers button{border:1px solid #9daf9f;background:white;border-radius:14px;min-height:58px;padding:12px;font-weight:650;color:var(--ink)}.answers button:not(:disabled):hover{background:#f0f5e0}.answers button:disabled{opacity:.55}.answers button.right{background:#dfefc5;color:#234416;border-color:#668b3c;opacity:1}.answers button.wrong{background:#fae5dd;color:#772a1b;border-color:#a54c35;opacity:1}.note-answers{grid-template-columns:repeat(7,1fr)}.answer-feedback{padding:17px 20px;border-radius:14px;background:#f1f4f1;margin:25px 0;color:#42514b;min-height:64px}.answer-feedback.success{background:#e9f3d9;color:#28451d}.answer-feedback.correction{background:#fcf0da;color:#644518}.text-button{border:0;background:transparent;color:var(--muted);text-decoration:underline;text-underline-offset:4px;padding:14px 18px;font-size:.9rem;min-height:48px}.staff{max-width:500px;margin:20px auto 0}.staff svg{display:block;width:100%;height:auto}.local-note{font-size:.8rem;color:var(--muted);margin-top:20px}.guide-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}.guide-card{display:block;border-bottom:1px solid #c5d0c7;padding:30px 0;text-decoration:none}.guide-card .eyebrow{color:var(--blue)}.guide-card h2{font-size:1.8rem;margin:14px 0}.guide-card>p:not(.eyebrow){color:var(--muted);margin-bottom:20px}.guide-card:hover h2{text-decoration:underline;text-decoration-thickness:1px;text-underline-offset:5px}.article{max-width:760px;margin:45px auto 65px}.article h1{font-size:clamp(2.3rem,4vw,3.5rem);margin:15px 0 24px}.article-intro{font-size:1.2rem;color:var(--muted);line-height:1.6}.byline{font-size:.82rem;color:var(--muted);margin-top:20px}.article section{margin-top:34px;scroll-margin-top:25px}.article h2{font-size:1.75rem;line-height:1.2;margin-bottom:18px}.article p{line-height:1.85}.article-index{display:flex;flex-direction:column;gap:8px;background:#edf2e8;padding:24px 28px;margin:30px 0 36px;border-radius:18px}.article-index p{font-weight:700;margin-bottom:5px}.article-index a{font-size:.95rem}.article-practice{background:var(--lime);padding:28px 32px;border-radius:20px;margin:40px 0 30px}.article-practice h2{margin:12px 0 20px}.source{font-size:.85rem;margin-top:30px;color:var(--muted)}.article .button{margin-top:15px}
@media(max-width:680px){.tool-help{grid-template-columns:1fr;gap:26px;margin:36px 0}.quiz-top{align-items:flex-start}.quiz-top label{align-items:flex-start;flex-direction:column;gap:5px}.quiz-top select{font-size:.85rem}.quiz-question{font-size:1.45rem}.answers{gap:8px}.answers button{padding:10px 6px;font-size:.9rem}.note-answers{grid-template-columns:repeat(4,1fr)}.beat-dots{gap:8px}.beat-dots span{width:34px;height:34px}.group-control{font-size:.95rem}.guide-grid{grid-template-columns:1fr;gap:0}.article{margin-top:25px}.article-index{padding:22px}.article h2{font-size:1.5rem}.article-practice{padding:24px}.tool-help h2{font-size:1.8rem}.listen-pair{margin-top:30px}.quiz-app>.button{gap:10px}.quiz-app .text-button{display:block;margin:auto}.tempo-display output{font-size:5.5rem}}