@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;450;500;550;600;650;700&family=Libre+Caslon+Display&display=swap');

:root{--ink:#182d36;--ink-deep:#14262e;--body:#45555b;--muted:#738087;--accent:#a35436;--accent-soft:#f4e9e0;--gold:#e9bf75;--canvas:#f6f5f1;--paper:#fff;--line:#e5e7e4;--serif:'Libre Caslon Display',Georgia,serif;--sans:'DM Sans',-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;font-family:var(--sans);color:var(--ink);font-size:1rem;font-synthesis:none;line-height:1.55}
*{box-sizing:border-box}body{margin:0;background:var(--canvas)}button,input,select{font:inherit}button,a,input,select{-webkit-tap-highlight-color:transparent}button{cursor:pointer;color:inherit}button:disabled{cursor:not-allowed;opacity:.48}a{color:inherit;text-decoration:none}button{border:0;background:none}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid #ba703d;outline-offset:4px}button,a,select{touch-action:manipulation}h1,h2,h3,p{margin:0}h1,h2,h3{font-weight:400}h1,h2{font-family:var(--serif)}.icon{width:21px;height:21px;flex-shrink:0;vertical-align:middle}.skip-link{position:fixed;top:-100px;left:20px;padding:12px;background:var(--paper);z-index:100}.skip-link:focus{top:10px}.sidebar{width:252px;position:fixed;inset:0 auto 0 0;background:var(--ink);color:#d1dadb;padding:39px 23px 20px;display:flex;flex-direction:column;z-index:10}.brand{display:flex;align-items:center;gap:12px;margin:0 14px 51px;color:#fff;font-family:var(--serif);font-size:2.3125rem;line-height:1}.brand-mark{width:44px;height:48px;display:grid;place-items:center;border:1px solid #b28e56;border-radius:23px 23px 4px 4px;color:var(--gold);font-family:Georgia,serif;font-size:1.9375rem}.brand small{display:block;letter-spacing:2.2px;font:10px var(--sans);color:#aebbbb;margin-top:9px}.nav-caption{font-size:0.75rem;letter-spacing:2px;color:#96a9af;margin:0 15px 14px}.nav-link{display:flex;align-items:center;gap:13px;padding:13px 16px;margin-bottom:7px;font-size:1rem;font-weight:500;border-radius:5px;color:#bfcdcf}.nav-link .icon{width:19px;height:19px}.nav-link:hover{background:#223a44;color:#fff}.nav-link.active{background:#304750;color:#fff;box-shadow:inset 3px 0 var(--gold)}.nav-count{font-size:0.875rem;margin-left:auto;border-radius:3px;background:#47616a;padding:0 6px}.sidebar-bottom{margin-top:auto}.sidebar-note{font-family:var(--serif);font-size:1.6875rem;line-height:1.25;color:#e1e6e3;margin:40px 16px 24px}.sidebar-note em{color:#cbaa78;font-style:normal}.edition{font-size:0.75rem;letter-spacing:1.3px;display:block;margin:0 16px 24px;color:#9eb0b4}.profile{border-top:1px solid #3a4d55;padding:21px 2px 0;display:flex;align-items:center;gap:10px;width:100%;text-align:left;font-size:0.875rem;color:#e3e9e7}.profile>span:nth-child(2){flex:1}.profile small{display:block;font-size:0.75rem;color:#9baeb1;margin-top:3px}.avatar{border:1px solid #53686d;border-radius:50%;width:34px;height:34px;display:grid;place-items:center;color:#cdb38b}.avatar .icon{width:17px}.profile>.icon{width:16px}.app-body{margin-left:252px}.topbar{height:85px;border-bottom:1px solid #e2e4df;display:flex;align-items:center;justify-content:space-between;padding:0 46px;background:rgba(255,255,255,.38)}.breadcrumb{font-size:0.875rem;color:#45555d}.breadcrumb>span{margin:0 14px;color:#aab3b3}.topbar-right{display:flex;align-items:center;gap:20px}.beta{font-size:0.75rem;font-weight:600;letter-spacing:1.5px;color:#65726e;border:1px solid #d5dcd5;border-radius:3px;padding:4px 8px}.icon-button{width:35px;height:35px;display:inline-grid;place-items:center;border-radius:50%}.icon-button:hover{background:#e5e8e2}main{max-width:1500px;margin:auto;padding:42px 46px 25px;outline:none}.page-heading{display:flex;align-items:center;justify-content:space-between;gap:20px;margin-bottom:30px}.eyebrow{font-size:0.75rem;letter-spacing:2px;font-weight:650;color:var(--accent);margin-bottom:7px}h1{font-size:3.25rem;line-height:1.12;letter-spacing:-1.2px}.page-heading p{font-size:1rem;color:var(--body);margin-top:10px}.heading-note{display:flex;align-items:center;gap:12px;margin-top:20px;font-size:0.875rem}.heading-note>.icon{width:29px;height:29px;color:var(--accent)}.heading-note small{font-size:0.75rem;display:block;color:var(--muted);margin-top:3px}.practice-grid{display:grid;grid-template-columns:minmax(0,1fr) 283px;gap:26px;align-items:start}.lesson-column{min-width:0}.lesson-card{background:var(--paper);border:1px solid var(--line);border-radius:8px;overflow:hidden;box-shadow:0 4px 20px #1a303604}.lesson-top{padding:20px 29px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid #eff0eb}.unit-label{font-size:0.75rem;font-weight:600;color:#617270}.unit-label>span{margin:0 9px;color:#c7cbc5}.lesson-number{font-size:1rem;font-variant-numeric:tabular-nums}.lesson-number>span{color:#b1b6b3;font-size:0.75rem}.lesson-intro{padding:27px 29px 21px}.muted{color:var(--muted)!important}.lesson-intro h2{font-size:2.1875rem;line-height:1.15;margin-bottom:12px;letter-spacing:-.45px}.lesson-intro p{font-size:1rem;max-width:540px;color:var(--body);line-height:1.7}.lesson-intro .eyebrow{font-size:0.75rem;letter-spacing:1.5px;margin-bottom:10px}.lesson-tabs{display:flex;border-bottom:1px solid var(--line);padding:0 29px;gap:26px}.lesson-tabs button{font-size:0.875rem;padding:12px 0 13px;position:relative;color:#74807f;display:flex;align-items:center;gap:7px}.lesson-tabs .icon{width:16px;height:16px}.lesson-tabs .selected{color:var(--ink);font-weight:600}.lesson-tabs .selected:after{position:absolute;content:'';bottom:-1px;height:2px;background:var(--accent);left:0;right:0}.exercise-area{padding:24px 29px 26px}.exercise-toolbar{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:9px}.small-label{font-size:0.75rem;font-weight:600;letter-spacing:1.4px;color:#6b7a7c}.exercise-options{display:flex;gap:8px;align-items:center}select{background:#fff;border:1px solid #dce1dc;color:#5a6b6d;border-radius:4px;font-size:0.75rem;padding:6px 9px;max-width:100%}.chip{font-size:0.75rem;padding:4px 8px;border:1px solid #dce2dd;border-radius:4px;background:#f7f8f4;color:#60736d}.chip.on{background:#eaf0eb;color:#355d50}.score-scroll{margin:0 -9px;overflow-x:auto}.staff{display:block;width:100%;min-width:380px;height:auto;max-height:203px;color:var(--ink)}.staff-line{stroke:#cfd8d4;stroke-width:.9}.ledger,.stem{stroke:currentColor;stroke-width:1.6}.clef{font-family:'Segoe UI Symbol','Noto Music',serif;font-size:6.4375rem;fill:var(--ink)}.notehead{fill:currentColor;stroke:currentColor;stroke-width:1.7}.notehead.open{fill:white}.note-label,.lyric{font-family:var(--sans);text-anchor:middle;font-size:1rem;fill:#607274}.score-note{color:var(--ink);transition:color .15s}.score-note.sounding{color:var(--accent)}.score-note.answered{color:#31735e}.audio-controls{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin-top:12px}.button{padding:11px 17px;border-radius:5px;font-size:0.875rem;font-weight:550;display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:43px;border:1px solid transparent;transition:background .15s,transform .15s}.button .icon{width:17px;height:17px}.button.primary{background:var(--ink);color:#fff}.button.primary:hover{background:#294651}.button.secondary{background:#fff;border-color:#d6ded8;color:var(--ink)}.button.secondary:hover{background:#f3f5f1}.button.playing{background:var(--accent);color:#fff}.button:active{transform:translateY(1px)}.tempo-control{display:flex;gap:4px;align-items:center;margin-left:auto;font-size:0.75rem;color:#5d6c6d}.tempo-control>span{font-size:0.75rem;color:#88928e}.tempo-control input{width:60px;margin-left:8px;accent-color:var(--accent);height:4px}.answer-section{padding-top:24px;margin-top:23px;border-top:1px solid #edf0ea}.choices{display:flex;gap:9px;flex-wrap:wrap;margin-top:11px}.answer-button{border:1px solid #dce2dc;border-radius:4px;flex:1;padding:11px 12px;font-size:0.875rem;text-align:left;display:flex;align-items:center;gap:9px;background:#fff;min-height:43px}.answer-button>span{font-size:0.75rem;color:#7c8984;border:1px solid #e2e7e0;padding:0 5px;border-radius:2px}.answer-button:hover{border-color:#a76c4b;background:#fcf8f4}.answer-button.correct{background:#eaf2e9;border-color:#7b9d8a;opacity:1}.answer-button.incorrect{background:#f9eee8;border-color:#b58060;opacity:1}.lesson-bottom{background:#fbfcf9;border-top:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;gap:15px;padding:14px 29px;font-size:0.75rem;color:#728077}.lesson-bottom>span{display:flex;gap:7px;align-items:center}.lesson-bottom .icon{width:14px;height:14px}.text-button{padding:3px 0;color:var(--accent);font-size:0.75rem;display:inline-flex;align-items:center;gap:6px;text-align:left}.text-button .icon{width:14px;height:14px}.text-button:hover{text-decoration:underline}.practice-tools{display:grid;grid-template-columns:1fr 1fr;gap:15px;margin-top:18px}.tool-card{display:flex;gap:12px;align-items:center;text-align:left;border:1px solid #dfe4dd;border-radius:6px;padding:18px 16px;background:#ffffff80}.tool-card:hover{background:#fff;border-color:#a5b6ad}.tool-icon{display:grid;place-items:center;width:36px;height:40px;color:#886342;background:#eee9de;border-radius:4px}.tool-icon .icon{width:20px}.tool-card:nth-child(2) .tool-icon{background:#e7eeea;color:#466755}.tool-card>span:nth-child(2){flex:1}.tool-card b{font-size:0.875rem;font-weight:550}.tool-card small{font-size:0.75rem;display:block;color:var(--muted);margin-top:3px}.tool-card>.icon{width:16px;height:16px;color:#88978b}.learning-note{display:flex;gap:10px;align-items:center;margin:22px 1px 0;color:#738178;font-size:0.75rem}.learning-note .icon{width:16px}.journey-card{border:1px solid var(--line);border-radius:7px;padding:23px 23px 0;background:var(--paper)}.section-title{display:flex;justify-content:space-between;align-items:center;gap:10px}.section-title h3{font-size:1rem;font-weight:600}.section-title a .icon{width:16px;height:16px;color:#7d8c81}.progress-overview{margin-top:20px;display:flex;align-items:center;gap:15px}.progress-overview strong{font-size:1.625rem;font-weight:500;white-space:nowrap;line-height:1}.progress-overview strong>span{font-size:1rem;color:#95a19a;font-weight:400}.progress-overview>span{font-size:0.75rem;line-height:1.5;color:#758377;max-width:85px}.progress-track{height:4px;border-radius:2px;background:#e9eee8;margin:15px 0 22px}.progress-track>span{display:block;height:100%;border-radius:2px;background:#55775f}.journey{position:relative;margin-bottom:25px}.journey:before{content:'';position:absolute;left:13px;top:17px;bottom:27px;width:1px;background:#e1e6dd}.journey-step{display:flex;align-items:flex-start;gap:13px;width:100%;text-align:left;position:relative;padding:8px 0 18px;color:#7e8980}.journey-step:last-child{padding-bottom:0}.step-node{width:27px;height:27px;flex:0 0 27px;border-radius:50%;border:1px solid #dce2d8;background:#fff;color:#9aa498;display:grid;place-items:center;font-size:0.75rem}.journey-step.current .step-node{background:var(--ink);border-color:var(--ink);color:white;box-shadow:0 0 0 4px #f0f2ec}.step-node .icon{width:14px}.journey-step b{display:block;font-size:0.875rem;font-weight:500;margin-top:1px}.journey-step.current b{color:var(--ink);font-weight:600}.journey-step small{font-size:0.75rem;display:block;margin-top:3px;color:#8a958a}.full-path{border-top:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;font-size:0.75rem;padding:15px 0;color:#657665}.full-path .icon{width:14px}.review-card{margin-top:18px;padding:24px 24px 23px;background:#eaf0e9;border:1px solid #dde6db;border-radius:6px}.review-icon{color:#617859;display:block;margin-bottom:13px}.review-icon .icon{width:20px}.review-card h3{font-family:var(--serif);font-size:1.5625rem;line-height:1.15;color:#344d3f;margin-bottom:11px}.review-card p{font-size:0.875rem;color:#687966;line-height:1.75;margin-bottom:17px}.review-card .small-label{font-size:0.75rem;color:#688363}.review-card .text-button{color:#47654d}.tradition-note{margin:24px 16px}.tradition-note .small-label{font-size:0.75rem;color:#9a8361}.tradition-note p{font-family:var(--serif);font-size:1.4375rem;line-height:1.3;margin:8px 0 13px}.tradition-note a{font-size:0.75rem;color:#7f8b7d}.tradition-note .icon{width:13px;margin-left:7px}.footer{border-top:1px solid #e2e5dd;max-width:1408px;margin:20px 46px 0;padding:18px 0 24px;display:flex;justify-content:space-between;gap:15px;color:#899186;font-size:0.75rem}.footer .text-button{font-size:0.75rem;color:#6f7c70}.feedback{display:flex;gap:12px;align-items:flex-start;margin-top:23px;background:#f7eee6;border:1px solid #ead8c8;border-radius:5px;padding:17px;font-size:0.875rem}.feedback.success{background:#edf4ed;border-color:#d7e4d5}.feedback-icon{color:#846247}.feedback.success .feedback-icon{color:#4b7552}.feedback b{font-weight:600}.feedback p{margin-top:4px;line-height:1.7;color:#637060}.feedback-detail{display:block;color:#74816e;font-size:0.75rem;margin-top:8px}.result-actions{display:flex;gap:10px;align-items:center;flex-wrap:wrap;margin-top:15px}.result-actions>.text-button{margin-left:auto}.coach-response{font-size:0.875rem;line-height:1.8;color:var(--body);margin-top:12px;white-space:pre-wrap}.reflection{background:#f3f4ee;border-radius:5px;padding:15px;margin-top:20px;font-size:0.875rem}.understand{padding:33px 29px}.understand h3{font-family:var(--serif);font-size:1.875rem;margin:12px 0 14px;line-height:1.15}.understand>p{font-size:1rem;line-height:1.9;color:var(--body)}.try-this{border-left:2px solid #b9945c;background:#faf8f1;padding:15px 19px;margin:24px 0;font-size:0.875rem}.try-this p{margin-top:7px;color:#778071;font-size:0.875rem}.pitch-surface{margin:18px 0 22px;border:1px solid #e4e9e0;border-radius:5px;overflow:hidden;background:#fbfcf8}.pitch-meta{display:flex;justify-content:space-between;padding:14px 17px;font-size:0.75rem;letter-spacing:1.3px;color:#748573}.register-label{letter-spacing:0;font-size:0.75rem}.pitch-center{display:flex;align-items:center;justify-content:center;gap:17px;padding:2px 12px 9px}.pitch-center strong{font-family:var(--serif);font-size:3.1875rem;font-weight:400;line-height:1.1}.pitch-center>span{font-size:0.875rem;color:#6c7d6a}.pitch-graph{position:relative;height:120px;margin:0 17px}.target-band{position:absolute;left:0;right:0;height:25px;top:47.5px;background:#e8eee0}.pitch-zero{position:absolute;left:0;right:0;height:1px;top:60px;background:#adbd9c}.graph-label{position:absolute;right:0;font-size:0.75rem;color:#a0ab96}.graph-label.top{top:4px}.graph-label.bottom{bottom:4px}.pitch-graph svg{position:absolute;inset:0;width:100%;height:100%}.pitch-graph path{fill:none;stroke:var(--accent);stroke-width:2.5}.pitch-foot{padding:10px 17px;display:flex;justify-content:space-between;font-size:0.75rem;color:#8c9b80;border-top:1px solid #e5eade}.hidden-message{display:none;font-size:0.875rem;color:#7c8c71}.hidden-guide{display:grid;place-items:center}.hidden-guide>*{display:none}.hidden-guide .hidden-message{display:block}.privacy-note{font-size:0.75rem;color:#788570;line-height:1.6;margin-top:19px}.record-dot{width:8px;height:8px;background:#b85942;border-radius:50%;animation:pulse 1s infinite}.button.recording{color:#ad513b;border-color:#c59176;background:#fcf4ed}@keyframes pulse{50%{opacity:.35}}.keyboard-heading{display:flex;justify-content:space-between;gap:15px;font-size:0.75rem;color:#617161;margin:23px 0 10px}.keyboard-heading>span:last-child{color:#96a08f}.keyboard{position:relative;height:151px;isolation:isolate;border:1px solid #b6c1b4;border-top:5px solid var(--ink);border-radius:3px;overflow:hidden;background:#dbe2d7;user-select:none}.piano-key{position:absolute;top:0;display:flex;flex-direction:column;justify-content:flex-end;align-items:center;padding-bottom:9px}.white-key{width:12.5%;height:100%;background:#fff;border-right:1px solid #cdd5c8;border-radius:0 0 3px 3px;box-shadow:inset 0 -5px #edf0e9}.white-key span{font-size:0.875rem;color:#405940}.white-key small{font-size:0.75rem;color:#a0ab97;line-height:1.4}.black-key{height:61%;width:7.2%;background:#253c43;z-index:2;box-shadow:inset 0 -6px #122a33;border-radius:0 0 3px 3px}.white-key.pressed,.white-key:active{background:#e8c78f;box-shadow:inset 0 -2px #c59f62}.black-key.pressed,.black-key:active{background:#a56c44}.tap-area{display:flex;gap:25px;align-items:center;justify-content:center;margin-top:23px;padding:22px;border-top:1px solid #ecf0e7}.tap-button{display:flex;flex-direction:column;align-items:center;padding:17px 29px;border:1px solid #cbd7c3;background:#f4f7ef;border-radius:8px;font-size:0.875rem;min-height:106px}.tap-button .icon{margin-bottom:5px}.tap-button small{font-size:0.75rem;color:#87947a}.tap-button:active{background:#dfead6}.tap-dots{display:flex;gap:9px}.tap-dots i{width:12px;height:12px;border:1px solid #b9c9aa;border-radius:50%}.tap-dots i.tapped{background:#587650}.path-counter{font-size:2.6875rem;font-weight:400;line-height:1}.path-counter small{display:block;font-size:0.75rem;color:var(--muted);margin-top:8px}.path-layout{display:grid;grid-template-columns:minmax(0,1fr) 275px;gap:27px;align-items:start}.path-layout>aside>.review-card{margin-top:0}.unit-section{margin-bottom:25px}.unit-header{display:flex;align-items:center;gap:15px;margin:0 0 13px}.unit-header>span{font-family:var(--serif);color:#a47c50;font-size:2.3125rem}.unit-header h2{font-size:1.6875rem}.unit-header p{font-size:0.75rem;color:var(--muted)}.unit-header>small{margin-left:auto;font-size:0.75rem;color:#869480}.lesson-list{border:1px solid var(--line);border-radius:7px;overflow:hidden;background:#fff}.lesson-row{display:flex;align-items:center;gap:15px;width:100%;text-align:left;padding:17px 20px;border-bottom:1px solid #e9eee3}.lesson-row:last-child{border-bottom:0}.lesson-row:hover{background:#fbfcf7}.row-number{width:32px;height:32px;background:#f1f4ec;border-radius:50%;display:grid;place-items:center;font-size:0.75rem;color:#96a188;flex-shrink:0}.row-number.done{background:#e1eddb;color:#486f3f}.row-number .icon{width:17px}.lesson-row b{font-size:0.875rem;font-weight:500}.lesson-row small{font-size:0.75rem;color:#8b977d;display:block;margin-top:4px}.row-status{font-size:0.75rem;color:#89947d;margin-left:auto;text-align:right;max-width:90px}.lesson-row>.icon{width:15px;color:#7f9072}.later-card{padding:24px 8px}.later-card h3{font-family:var(--serif);font-size:1.8125rem;margin:9px 0 18px;line-height:1.15}.later-card ol{padding-left:20px;font-size:0.875rem;color:#5b7051;line-height:2}.later-card p{font-size:0.75rem;color:#8a957b;line-height:1.8}.stat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-bottom:25px}.stat-grid>div{padding:27px;background:#fff;border:1px solid var(--line);border-radius:6px}.stat-grid strong{font-family:var(--serif);font-size:2.875rem;font-weight:400;line-height:1}.stat-grid strong>span{font-size:1.5rem;color:#a0ab93;margin-left:4px}.stat-grid p{font-size:0.875rem;color:#7b8a6e;margin-top:11px}.progress-layout{display:grid;grid-template-columns:1fr 1fr;gap:25px}.white-panel{background:white;border:1px solid var(--line);border-radius:6px;padding:25px}.white-panel h2{font-size:1.75rem;margin-bottom:20px}.white-panel>p{font-size:0.875rem}.activity-chart{display:flex;gap:15px;justify-content:space-around;height:190px}.activity-chart>div{display:flex;flex:1;flex-direction:column;align-items:center}.bar-space{height:130px;display:flex;align-items:flex-end;width:100%;justify-content:center;margin:6px 0 9px}.bar-space span{width:24px;max-width:80%;border-radius:3px 3px 0 0;background:#e9eee3;min-height:3px}.bar-space .has-activity{background:#6a8260}.activity-chart b{font-size:0.75rem;font-weight:500;color:#6f855f}.activity-chart small{font-size:0.75rem;color:#879a76}.review-row{display:flex;align-items:center;justify-content:space-between;gap:10px;width:100%;padding:13px 0;text-align:left;border-bottom:1px solid var(--line);font-size:0.875rem}.empty-state{text-align:center;padding:10px 20px;color:#80916e}.empty-state>.icon{width:28px;height:28px}.empty-state h3{font-family:var(--serif);font-size:1.5625rem;color:#4b6140;margin:10px 0 6px}.empty-state p{font-size:0.875rem;margin-bottom:18px}.text-link{font-size:0.875rem;color:var(--accent);display:inline-flex;align-items:center;gap:8px}.text-link .icon{width:15px}.history-panel{margin-top:25px}.history-list>div{display:flex;gap:15px;align-items:center;border-bottom:1px solid var(--line);padding:14px 0;font-size:0.875rem}.history-list>div:last-child{border-bottom:0}.history-symbol{color:#ab8460;border-radius:50%;background:#f6eee3;width:30px;height:30px;display:grid;place-items:center}.history-symbol.passed{color:#648754;background:#edf3e8}.history-symbol .icon{width:16px}.history-list b{font-size:0.875rem;font-weight:500}.history-list small{display:block;font-size:0.75rem;color:#89997b;margin-top:3px}.history-result{margin-left:auto;font-size:0.75rem;text-align:right;color:#6d835b}.data-controls{display:flex;justify-content:space-between;gap:15px;font-size:0.75rem;color:#7c8e6c;margin:20px 2px}.import-label{cursor:pointer}.import-label input{display:none}.library-feature{display:grid;grid-template-columns:1fr 1fr;align-items:center;gap:30px;background:#e7eae0;border:1px solid #dce1d4;border-radius:7px;overflow:hidden;padding:35px;margin-bottom:28px}.feature-number{font-family:var(--serif);font-size:6.875rem;line-height:1;text-align:center;color:#83916c;letter-spacing:-4px}.library-feature h2{font-size:2.3125rem;line-height:1.1;margin:10px 0 16px}.library-feature p{font-size:0.875rem;color:#6f7f5f;line-height:1.9;margin-bottom:20px}.reference-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px}.reference-card{padding:28px;background:#fff;border:1px solid var(--line);border-radius:6px;display:flex;align-items:flex-start;flex-direction:column;transition:transform .2s,border-color .2s}.reference-card:hover{transform:translateY(-3px);border-color:#b9c2ac}.resource-index{font-family:var(--serif);font-size:2.0625rem;color:#b4a384;margin-bottom:12px}.reference-card h3{font-family:var(--serif);font-size:1.8125rem;margin:10px 0;line-height:1.2}.reference-card p{font-size:0.875rem;color:#7d8b6c;line-height:1.9;margin-bottom:24px}.reference-card .text-link{margin-top:auto}.library-note{display:flex;gap:14px;font-size:0.875rem;color:#748264;margin:28px 5px}.library-note .icon{width:20px;margin-top:3px}dialog{border:1px solid #e0e5d9;box-shadow:0 20px 100px #122a3350;max-width:560px;width:calc(100% - 32px);padding:40px;border-radius:9px;color:var(--ink);background:#fff}dialog::backdrop{background:#182d3680;backdrop-filter:blur(3px)}dialog h2{font-size:2.25rem;line-height:1.2;margin:10px 0 20px}dialog p{font-size:1rem;color:#6e7c65;line-height:1.9;margin-bottom:18px}.modal-close{position:absolute;right:15px;top:13px}.setting-row{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:19px 0;border-top:1px solid var(--line);font-size:0.875rem}.setting-row small{display:block;font-size:0.75rem;color:#8c967e;max-width:260px;margin-top:4px}.setting-row input{accent-color:var(--accent);width:20px;height:20px}.settings-note{padding-top:20px;font-size:0.875rem!important;border-top:1px solid var(--line)}.toast{position:fixed;bottom:24px;left:calc(50% + 100px);transform:translate(-50%,20px);background:var(--ink);color:#fff;border-radius:6px;padding:13px 21px;font-size:0.875rem;box-shadow:0 5px 25px #182d3625;max-width:calc(100% - 30px);opacity:0;pointer-events:none;z-index:100;transition:opacity .2s,transform .2s}.toast.visible{opacity:1;transform:translate(-50%,0)}

/* Text scales up without sacrificing the working surface. */
@media(min-width:1600px){:root{font-size:1.125rem}.sidebar{width:280px}.app-body{margin-left:280px}main{padding-top:50px}.practice-grid{grid-template-columns:minmax(0,1fr) 320px;gap:32px}.lesson-intro{padding-top:32px}.exercise-area{padding-top:28px}.staff{max-height:240px}.journey-step{padding-bottom:22px}}
@media(max-width:1190px){.sidebar{width:212px;padding-left:16px;padding-right:16px}.brand{margin-left:10px}.app-body{margin-left:212px}.topbar{padding:0 29px}main{padding:33px 29px 20px}.practice-grid{grid-template-columns:minmax(0,1fr) 246px;gap:19px}.lesson-intro,.exercise-area{padding-left:23px;padding-right:23px}.lesson-top{padding-left:23px;padding-right:23px}.lesson-tabs{padding-left:23px;padding-right:23px}.heading-note{display:none}.journey-card{padding:20px 18px 0}.review-card{padding:20px}.lesson-intro h2{font-size:2rem}.tool-card{gap:8px;padding:15px 11px}.tool-card>.icon{display:none}.tool-card small{font-size:0.75rem}.tempo-control{margin-left:0}.footer{margin-left:29px;margin-right:29px}.path-layout{grid-template-columns:minmax(0,1fr) 230px}.lesson-row{gap:11px;padding:15px}.row-status{max-width:70px}.library-feature{gap:20px;padding:27px}.feature-number{font-size:5.3125rem}}
@media(max-width:980px){.sidebar{width:190px;padding:28px 12px 15px}.brand{margin:0 12px 40px;font-size:2rem;gap:10px}.brand-mark{width:35px;height:43px;font-size:1.6875rem}.nav-link{font-size:0.875rem;padding:13px 12px;gap:10px}.nav-caption{margin-left:12px}.sidebar-note{font-size:1.5rem}.edition{font-size:0.75rem;letter-spacing:.8px}.profile{font-size:0.75rem;gap:8px}.profile small{font-size:0.75rem}.profile>.icon{display:none}.app-body{margin-left:190px}.topbar{height:70px;padding:0 25px}main{padding:29px 25px 20px}.practice-grid{grid-template-columns:minmax(0,1fr)}.right-column{display:grid;grid-template-columns:1fr 1fr;gap:18px}.review-card{margin-top:0;align-self:start}.tradition-note{display:none}.journey-card{padding:22px 23px 0}.journey{margin-bottom:20px}.journey-step{padding-bottom:14px}.heading-note{display:flex}.path-layout{grid-template-columns:1fr}.path-layout>aside{display:grid;grid-template-columns:1fr 1fr;gap:25px}.later-card{padding-top:10px}.row-status{max-width:none}.library-feature{grid-template-columns:.8fr 1fr}.reference-card{padding:24px}.reference-card h3{font-size:1.6875rem}.toast{left:calc(50% + 80px)}.lesson-intro h2{font-size:2.1875rem}.tool-card b{font-size:0.875rem}.tool-card small{font-size:0.75rem}}
@media(max-width:700px){.sidebar{position:sticky;top:0;left:0;right:0;width:100%;height:auto;padding:0;background:var(--ink);display:block}.brand{font-size:1.6875rem;margin:0;padding:12px 20px;gap:10px}.brand-mark{width:29px;height:34px;font-size:1.4375rem;border-radius:16px 16px 3px 3px}.brand small{display:inline;font-size:0.75rem;margin-left:13px;letter-spacing:1.4px}.sidebar nav{display:flex;padding:0 8px;border-top:1px solid #304650;justify-content:space-around}.nav-link{padding:10px 10px;margin:0;font-size:0.75rem;gap:6px;border-radius:0;flex-direction:column;flex:1;line-height:1.2;text-align:center}.nav-link .icon{width:17px;height:17px}.nav-link.active{box-shadow:inset 0 -2px var(--gold);background:#29424b}.nav-count,.nav-caption,.sidebar-bottom{display:none}.app-body{margin-left:0}.topbar{height:49px;padding:0 20px}.breadcrumb{font-size:0.75rem}.breadcrumb>span{margin:0 9px}.beta{font-size:0.75rem;padding:3px 6px;letter-spacing:1px}.topbar-right{gap:10px}.topbar .icon-button{width:26px;height:26px}.topbar .icon{width:17px}main{padding:26px 18px 18px}.page-heading{margin-bottom:23px}.page-heading h1{font-size:2.5625rem;letter-spacing:-.8px}.page-heading p{font-size:0.875rem;max-width:280px;line-height:1.8}.eyebrow{font-size:0.75rem}.heading-note{display:none}.practice-grid{gap:20px}.lesson-top{padding:15px 19px}.unit-label{font-size:0.75rem}.unit-label>span{margin:0 6px}.lesson-intro{padding:23px 19px 18px}.lesson-intro h2{font-size:2rem}.lesson-intro p{font-size:0.875rem}.lesson-tabs{padding:0 19px}.exercise-area{padding:20px 18px}.small-label{font-size:0.75rem}.exercise-toolbar{gap:5px}.exercise-options{gap:5px}select{font-size:0.75rem;padding:6px}.chip{font-size:0.75rem;padding:5px}.staff{min-width:330px}.score-scroll{margin:0 -8px}.audio-controls{gap:8px;margin-top:8px}.button{font-size:0.75rem;padding:10px 12px;min-height:42px}.button .icon{width:16px}.tempo-control{margin-left:auto;font-size:0.75rem}.tempo-control input{width:45px;margin-left:4px}.choices{gap:7px}.answer-button{font-size:0.75rem;padding:10px;gap:6px}.lesson-bottom{padding:13px 18px;font-size:0.75rem;align-items:flex-start}.lesson-bottom>span{max-width:200px;align-items:flex-start}.lesson-bottom .text-button{white-space:nowrap;font-size:0.75rem}.practice-tools{gap:10px;margin-top:13px}.tool-card{padding:13px 10px;gap:8px}.tool-icon{width:30px;height:35px;flex:0 0 30px}.tool-icon .icon{width:18px}.tool-card b{font-size:0.75rem}.tool-card small{font-size:0.75rem;line-height:1.5}.learning-note{font-size:0.75rem;margin-top:18px;align-items:flex-start}.right-column{gap:13px;grid-template-columns:1fr}.journey-card{padding:22px 23px 0}.journey{display:grid;grid-template-columns:1fr 1fr;gap:15px;margin:20px 0}.journey:before{display:none}.journey-step{padding:0;gap:10px}.journey-step b{font-size:0.75rem}.journey-step small{font-size:0.75rem}.review-card{padding:22px}.review-card p{max-width:380px}.review-icon{float:left;margin:0 14px 10px 0}.review-card h3{font-size:1.6875rem}.footer{margin:5px 19px 0;padding:16px 0 22px;flex-direction:column;gap:6px;font-size:0.75rem}.footer .text-button{font-size:0.75rem}.toast{left:50%;width:max-content;max-width:calc(100% - 32px);font-size:0.875rem}.keyboard{height:135px}.keyboard-heading{font-size:0.75rem;flex-direction:column;gap:3px}.keyboard-heading>span:last-child{display:none}.pitch-center{gap:12px}.pitch-center strong{font-size:2.875rem}.pitch-center>span{font-size:0.75rem}.pitch-foot{font-size:0.75rem}.privacy-note{font-size:0.75rem}.feedback{padding:13px;font-size:0.75rem;gap:9px}.feedback .icon{width:17px}.feedback-detail{font-size:0.75rem}.result-actions .button{flex:1}.result-actions>.text-button{margin:5px 0 0}.understand{padding:27px 20px}.understand h3{font-size:1.75rem}.understand>p{font-size:1rem}.path-layout>aside{grid-template-columns:1fr}.unit-header h2{font-size:1.5rem}.unit-header>span{font-size:2.0625rem}.lesson-row{padding:15px 13px;gap:11px}.row-number{width:28px;height:28px}.lesson-row b{font-size:0.875rem}.lesson-row small{font-size:0.75rem;max-width:230px}.row-status{display:none}.lesson-row>.icon{margin-left:auto}.stat-grid{gap:9px}.stat-grid>div{padding:16px 12px}.stat-grid strong{font-size:2.25rem}.stat-grid strong>span{font-size:1.1875rem}.stat-grid p{font-size:0.75rem;line-height:1.65;margin-top:8px}.progress-layout{grid-template-columns:1fr;gap:16px}.page-heading>.button{font-size:0.75rem;padding:9px;max-width:92px}.white-panel{padding:21px}.history-list>div{gap:10px}.history-result{max-width:90px}.history-list b{font-size:0.75rem}.history-list small{font-size:0.75rem}.data-controls{font-size:0.75rem;align-items:flex-start;flex-direction:column}.library-feature{grid-template-columns:1fr;padding:27px;gap:18px}.feature-number{font-size:4.5625rem;text-align:left}.library-feature h2{font-size:2.125rem}.reference-grid{grid-template-columns:1fr;gap:14px}.library-note{font-size:0.875rem}.path-counter{font-size:2.0625rem}.path-counter small{font-size:0.75rem;max-width:65px;line-height:1.5}dialog{padding:30px 24px}dialog h2{font-size:2rem}dialog p{font-size:0.875rem}.setting-row{gap:13px}.setting-row b{font-size:0.875rem}.setting-row small{font-size:0.75rem}.tap-area{padding:20px 5px;gap:20px}.tap-button{padding:15px 20px}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation:none!important;transition:none!important;scroll-behavior:auto!important}}
.listening-surface{min-height:190px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:10px;background:#fafbf7;margin:12px 0 18px;border:1px solid #e5e9df;border-radius:5px;color:#6b7e5d}.listening-surface>.icon{width:32px;height:32px;margin-bottom:5px}.listening-surface>span{font-size:1rem}.listening-surface small{font-size:.75rem}.brand small{font-size:.75rem}.journey-step b{line-height:1.4}.tool-card small{line-height:1.6}.profile{flex-wrap:wrap}.profile small{font-size:.75rem}.nav-caption{font-size:.75rem}.edition{font-size:.75rem;line-height:1.8}.lesson-intro p,.understand>p{font-size:1rem}.footer{font-size:.75rem}.lesson-bottom>span{line-height:1.7}.privacy-note{font-size:.75rem}.register-label{font-size:.75rem}.tempo-control{flex-wrap:wrap}.stat-grid p{line-height:1.7}.sidebar .brand small{letter-spacing:1px;font-size:.625rem}@media(max-width:700px){.lesson-top{align-items:flex-start}.unit-label{max-width:230px}.choices{flex-wrap:wrap}.answer-button{min-width:85px}.practice-tools{grid-template-columns:1fr}.tool-card>.icon{display:block;margin-left:auto}.nav-link{font-size:.75rem;padding:10px 5px}.journey{grid-template-columns:1fr}.journey-step{padding:5px 0}.heading-note{display:none}.audio-controls .tempo-control{margin-left:0}.pitch-center{flex-direction:column;gap:4px}.pitch-foot{gap:10px}.exercise-toolbar{align-items:flex-start}.lesson-bottom{flex-wrap:wrap}.page-heading{align-items:flex-start}.lesson-number{white-space:nowrap}.topbar .beta{display:none}.topbar-right{margin-left:auto}.footer .text-button{font-size:.75rem}}
@media(max-width:620px){.staff{min-width:0}.sidebar .brand small{font-size:.75rem}}