:root{font-family:Inter,ui-sans-serif,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;font-synthesis:none}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;min-height:100vh;background:var(--bg);color:var(--text);transition:background-color .2s,color .2s}
body[data-path="studio"]{--bg:#0e172c;--surface:#17243f;--surface2:#202e4a;--surface3:#111d35;--border:#34415d;--text:#f7f7fd;--muted:#b8c3d9;--soft:#8d99b4;--accent:#bcb0ff;--accent-dark:#222143;--gold:#ffc994;--rose:#f4b3c9;--success:#a6e7d1;--error:#ffb8aa;--shadow:#060c1b50;--logo:#c7bbff;--wash:rgba(160,138,255,.10)}
body[data-path="explorer"]{--bg:#f9f5ee;--surface:#fffdf9;--surface2:#fff1dd;--surface3:#f3eee5;--border:#e3d7c8;--text:#302b3f;--muted:#615e69;--soft:#746e7d;--accent:#ad473c;--accent-dark:#fff3ea;--gold:#b25b35;--rose:#b65372;--success:#2f7665;--error:#a43e3b;--shadow:#62473015;--logo:#a63e49;--wash:rgba(239,155,107,.16)}
button,select{font:inherit}button{cursor:pointer}button:disabled{cursor:not-allowed;opacity:.44}button:focus-visible,select:focus-visible,a:focus-visible{outline:3px solid var(--gold);outline-offset:3px}button:active:not(:disabled){transform:translateY(1px)}a{color:var(--accent)}.hidden,[hidden]{display:none!important}
.shell{max-width:1450px;padding:23px 30px 52px;margin:0 auto}.top{display:flex;align-items:center;justify-content:space-between;gap:16px;padding-bottom:23px}.brand{display:flex;align-items:center;gap:13px}.brand-mark{width:48px;height:48px;border:1px solid var(--border);border-radius:15px;display:grid;place-items:center;background:var(--surface);color:var(--logo);box-shadow:0 7px 30px var(--shadow)}.brand-mark svg{width:32px;height:32px}.brand-title{font-size:13px;font-weight:900;letter-spacing:.23em}.brand-detail{color:var(--muted);font-size:12px;letter-spacing:.08em;margin-top:5px}.top-links{display:flex;align-items:center;gap:9px;flex-wrap:wrap}.top-links button{padding:9px 14px;font-size:13px;font-weight:750;color:var(--muted);border:1px solid transparent;border-radius:999px;background:transparent}.top-links button[aria-pressed="true"]{background:var(--surface);border-color:var(--border);color:var(--text)}
.intro{position:relative;overflow:hidden;border-radius:24px;display:grid;grid-template-columns:minmax(0,1fr) minmax(305px,375px);gap:20px;align-items:center;background:var(--surface);border:1px solid var(--border);padding:32px 35px;margin-bottom:18px;box-shadow:0 16px 45px var(--shadow)}.intro:before{content:"";position:absolute;width:400px;height:400px;right:-90px;top:-190px;background:radial-gradient(circle,var(--wash),transparent 68%);pointer-events:none}.kicker{font-size:11px;font-weight:850;letter-spacing:.18em;text-transform:uppercase;color:var(--accent)}h1{font-size:clamp(30px,3.7vw,51px);letter-spacing:-.045em;line-height:1.09;margin:11px 0 12px;max-width:760px}p{line-height:1.6}.intro p{font-size:14px;color:var(--muted);max-width:710px;margin:0}.path-block{position:relative;border:1px solid var(--border);background:var(--surface3);padding:15px;border-radius:17px}.path-caption{font-size:11px;font-weight:800;letter-spacing:.09em;text-transform:uppercase;color:var(--soft);margin-bottom:9px}.path-segment{display:flex;gap:5px;border-radius:12px;background:var(--surface2);padding:5px}.path-segment button{flex:1;min-height:45px;padding:7px 8px;border-radius:9px;border:1px solid transparent;background:transparent;color:var(--muted);font-size:12px;font-weight:750}.path-segment button[aria-pressed="true"]{background:var(--accent);color:var(--accent-dark);border-color:var(--accent);box-shadow:0 3px 13px var(--shadow)}.path-note{margin-top:9px;color:var(--muted);font-size:12px;line-height:1.5;min-height:35px}
.metrics{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin-bottom:18px}.metric{background:var(--surface);border:1px solid var(--border);border-radius:16px;padding:16px 19px;display:flex;align-items:center;gap:14px;min-height:87px}.metric-icon{display:grid;place-items:center;width:39px;height:39px;flex:0 0 39px;color:var(--accent);background:var(--surface3);border-radius:12px;font-size:18px}.metric b{display:block;font-size:26px;letter-spacing:-.04em;line-height:1.1}.metric span{font-size:12px;color:var(--muted)}.layout{display:grid;grid-template-columns:294px minmax(0,1fr);align-items:start;gap:18px}.panel{background:var(--surface);border:1px solid var(--border);border-radius:20px;box-shadow:0 12px 38px var(--shadow)}.side{padding:21px 13px;max-height:815px;overflow-y:auto}.side-head{display:flex;justify-content:space-between;gap:8px;align-items:center;padding:0 10px 13px}.side h2{font-size:13px;margin:0;letter-spacing:.09em;text-transform:uppercase}.quiet{font-size:12px;color:var(--muted)}.unit-title{font-size:10px;letter-spacing:.1em;text-transform:uppercase;font-weight:850;color:var(--soft);padding:18px 11px 8px;display:flex;align-items:center;justify-content:space-between}.unit-title span{font-size:10px;letter-spacing:0;text-transform:none;font-weight:600}.lesson-nav{width:100%;display:flex;align-items:center;gap:12px;border:1px solid transparent;background:transparent;padding:11px;border-radius:12px;color:var(--text);text-align:left;margin:3px 0}.lesson-nav:hover{background:var(--surface2)}.lesson-nav[aria-current="true"]{border-color:var(--accent);background:var(--surface2)}.lesson-id{height:37px;width:37px;flex:0 0 37px;border-radius:11px;border:1px solid var(--border);display:grid;place-items:center;font-size:12px;font-weight:850;color:var(--muted)}.lesson-nav[aria-current="true"] .lesson-id{background:var(--accent);color:var(--accent-dark);border-color:var(--accent)}.lesson-nav[data-status="mastered"] .lesson-id{color:var(--success);border-color:var(--success)}.lesson-nav strong{display:block;font-size:13px;line-height:1.3}.lesson-nav small{display:block;margin-top:4px;color:var(--muted);font-size:11px}.lesson-toggle{display:none}.side-foot{border-top:1px solid var(--border);margin:17px 9px 0;padding-top:16px;color:var(--muted);font-size:12px;line-height:1.65}.workspace{min-width:0;display:grid;grid-template-columns:minmax(0,1fr);gap:17px}.workspace>.panel{min-width:0}.content-card{padding:29px 31px}.view-meta{font-weight:850;font-size:11px;text-transform:uppercase;letter-spacing:.15em;color:var(--accent)}.lesson-head{display:flex;justify-content:space-between;gap:14px;align-items:start;margin:10px 0}.lesson-head h2,.view-head h2{font-size:clamp(24px,2.6vw,31px);letter-spacing:-.035em;line-height:1.14;margin:0}.tag{border:1px solid var(--border);border-radius:999px;padding:7px 11px;white-space:nowrap;color:var(--muted);font-size:11px}.lesson-description{color:var(--muted);font-size:14px;margin:12px 0 12px}.insight{display:flex;gap:13px;align-items:start;background:var(--surface3);border:1px solid var(--border);padding:14px 16px;border-radius:13px;font-size:13px;line-height:1.55;color:var(--text);margin-top:15px}.insight-symbol{font-weight:900;font-size:17px;color:var(--accent)}.section-name{font-size:11px;letter-spacing:.11em;text-transform:uppercase;font-weight:850;color:var(--soft);margin:22px 0 10px}.sequence{display:flex;align-items:center;flex-wrap:wrap;gap:7px;min-height:53px}.step-chip{min-width:41px;height:43px;display:grid;place-items:center;border:1px solid var(--border);border-radius:10px;background:var(--surface3);color:var(--muted);font-size:13px;font-weight:850;padding:0 9px}.step-chip.done{border-color:var(--success);color:var(--success)}.step-chip.now{border-color:var(--accent);background:var(--surface2);color:var(--text);box-shadow:0 0 0 2px var(--wash)}.step-extra{color:var(--muted);font-size:11px}.bar{height:8px;background:var(--surface3);border-radius:20px;overflow:hidden;margin:14px 0 15px}.bar > span{display:block;height:100%;background:var(--accent);width:0%;transition:width .2s}.feedback{display:flex;gap:12px;align-items:center;border:1px solid var(--border);border-radius:13px;background:var(--surface3);padding:13px 14px;font-size:13px;line-height:1.5;min-height:57px}.feedback .feedback-mark{width:27px;height:27px;border-radius:50%;display:grid;place-items:center;flex:0 0 27px;background:var(--surface2);color:var(--accent);font-weight:900}.feedback[data-tone="error"]{border-color:var(--error)}.feedback[data-tone="success"]{border-color:var(--success)}.feedback[data-tone="success"] .feedback-mark{color:var(--success)}.feedback[data-tone="error"] .feedback-mark{color:var(--error)}.actions{display:flex;flex-wrap:wrap;align-items:center;gap:9px;margin-top:17px}.btn{padding:10px 15px;border-radius:11px;font-size:12px;font-weight:850;min-height:41px;background:var(--surface2);border:1px solid var(--border);color:var(--text)}.btn:hover:not(:disabled){filter:brightness(1.07)}.btn.primary{background:var(--accent);color:var(--accent-dark);border-color:var(--accent)}.btn.ghost{background:transparent}.mini-setting{margin-left:auto;display:flex;align-items:center;gap:9px;font-size:11px;color:var(--muted)}select{background:var(--surface3);border:1px solid var(--border);color:var(--text);border-radius:9px;padding:9px;font-size:12px;max-width:150px}.note{font-size:12px;color:var(--muted);margin:13px 0 0}.view-head{margin:10px 0 12px}.view-intro{font-size:14px;color:var(--muted);margin:0 0 18px;max-width:780px}.ear-controls,.compose-toolbar{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin:17px 0}.result-pill{border:1px solid var(--border);background:var(--surface2);border-radius:13px;padding:10px 14px;font-weight:900;font-size:21px;margin-bottom:15px;display:inline-block}.progress-detail{font-size:12px;color:var(--muted);margin-top:10px}.phrase{display:flex;flex-wrap:wrap;gap:6px;min-height:60px;border:1px dashed var(--border);border-radius:13px;padding:12px;align-items:center}.phrase .step-chip{height:36px;min-width:36px}.placeholder{color:var(--muted);font-size:13px}.roadmap-unit{border:1px solid var(--border);background:var(--surface3);border-radius:14px;padding:17px;margin:12px 0}.roadmap-title{display:flex;justify-content:space-between;gap:10px;align-items:center}.roadmap-title h3{font-size:15px;margin:0}.roadmap-title span{font-size:11px;color:var(--muted)}.roadmap-unit p{font-size:13px;color:var(--muted);margin:7px 0 0}.roadmap-lessons{font-size:12px;line-height:1.7;margin-top:8px;color:var(--text)}.roadmap-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:13px}.data-controls{margin-top:21px;padding-top:18px;border-top:1px solid var(--border);display:flex;gap:15px;justify-content:space-between;align-items:center;flex-wrap:wrap}.board{padding:22px 25px}.board-heading{display:flex;justify-content:space-between;gap:12px;align-items:center;flex-wrap:wrap;margin-bottom:17px}.board h2{font-size:17px;letter-spacing:-.015em;margin:0 0 5px}.board .quiet{margin:0}.board-tools{display:flex;gap:7px;flex-wrap:wrap}.small-toggle{background:var(--surface3);color:var(--muted);border:1px solid var(--border);padding:9px 12px;border-radius:999px;font-size:11px;font-weight:750}.small-toggle[aria-pressed="true"]{color:var(--text);border-color:var(--accent)}.keyboard-scroll{width:100%;overflow-x:auto;padding:0 0 11px;scrollbar-color:var(--border) transparent}.keyboard{position:relative;min-width:790px;height:223px;display:flex;user-select:none;touch-action:pan-x;overflow:hidden;border-radius:8px 8px 13px 13px;background:white}.piano-key{position:relative;border:1px solid #9ca6ba;touch-action:none;cursor:pointer;padding:0}.piano-key.white{height:100%;flex:1;background:linear-gradient(180deg,#fff 0%,#f4f6fb 82%,#d4dbe8 100%);color:#394459;border-radius:0 0 7px 7px;box-shadow:inset -3px 0 rgba(0,0,0,.07)}.piano-key.black{position:absolute;top:0;height:60%;z-index:2;background:linear-gradient(180deg,#34415b 0%,#080f1e 96%);color:#e2e8f5;border-color:#101b2d;border-radius:0 0 5px 5px;box-shadow:3px 6px 7px rgba(0,0,0,.36)}.piano-key.white.active{background:linear-gradient(180deg,#dcd3ff,#aa92fe)}.piano-key.black.active{background:linear-gradient(180deg,#c9bbff,#7153b2)}.piano-key.target.white:not(.active):after{content:"";position:absolute;inset:2px;border:3px solid #c27353;border-radius:0 0 7px 7px;pointer-events:none}.piano-key.target.black:not(.active){outline:3px solid #f3a56c;outline-offset:-3px}.piano-label{pointer-events:none;position:absolute;bottom:18px;left:0;right:0;font-size:12px;font-weight:850;text-align:center}.piano-shortcut{pointer-events:none;position:absolute;bottom:5px;left:0;right:0;font-size:10px;text-align:center;opacity:.7}.piano-key.black .piano-label{bottom:16px;font-size:10px}.piano-key.black .piano-shortcut{font-size:9px}.keyboard.hide-labels .piano-label{display:none}.board-footer{display:flex;align-items:center;justify-content:space-between;gap:15px;flex-wrap:wrap;margin-top:11px}.midi-status{display:flex;align-items:center;gap:7px;font-size:12px;color:var(--muted)}.status-dot{width:9px;height:9px;border-radius:50%;background:var(--soft)}.status-dot.connected{background:var(--success)}.hint-shortcuts{font-size:12px;color:var(--muted)}.app-footer{display:flex;gap:12px;justify-content:space-between;flex-wrap:wrap;padding:23px 4px 0;color:var(--muted);font-size:11px;line-height:1.7}.step-list{margin:8px 0 0 18px;font-size:12px;color:var(--muted);line-height:1.8}
@media(max-width:1050px){.intro{grid-template-columns:1fr}.path-block{max-width:550px}.layout{grid-template-columns:246px minmax(0,1fr)}.content-card{padding:24px}.shell{padding:19px 19px 40px}}@media(max-width:790px){.layout{grid-template-columns:1fr}.side{max-height:none}.lesson-toggle{display:block;width:100%}.side.collapsed .side-foot{display:none}.side .lesson-groups{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:7px 13px}.side-foot{margin-top:9px}.metrics{gap:8px}.metric{padding:11px}.metric-icon{display:none}.roadmap-grid{grid-template-columns:1fr}}@media(max-width:550px){.shell{padding:13px 12px 34px}.top{align-items:flex-start;flex-direction:column;gap:12px}.top-links{width:100%;display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:4px}.top-links button{padding:10px 3px;font-size:11px}.intro{padding:22px 18px}.intro h1{font-size:32px}.metrics{grid-template-columns:repeat(3,1fr)}.metric{min-height:72px;padding:10px}.metric b{font-size:22px}.metric span{font-size:10px}.side .lesson-groups{grid-template-columns:1fr}.content-card,.board{padding:18px 15px}.lesson-head{display:block}.tag{display:inline-block;margin-top:10px}.actions .mini-setting{margin:6px 0 0;width:100%}.keyboard{height:205px}.board-footer{align-items:flex-start}.roadmap-unit{padding:13px}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{scroll-behavior:auto!important;transition:none!important}}

.practice-settings{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:10px;margin:16px 0 12px}
.practice-settings>div{background:var(--surface3);border:1px solid var(--border);padding:11px;border-radius:12px;min-width:0}
.practice-settings label{display:block;font-size:11px;font-weight:750;color:var(--muted);margin-bottom:8px}
.practice-settings select{width:100%;max-width:none;font-size:12px}
.learning-meter{color:var(--muted);font-size:12px;margin:8px 0 14px;min-height:18px}
.song-pickers{display:flex;gap:10px;align-items:center;flex-wrap:wrap;margin:18px 0}.song-pickers label{font-size:12px;color:var(--muted);font-weight:750}
.song-pickers #song-choice{max-width:360px;min-width:220px}.song-title-row{display:flex;align-items:center;gap:12px;flex-wrap:wrap}.song-title-row h3{font-size:20px;margin:7px 0}
.midi-activity{font-size:11px;color:var(--success);font-weight:650}
@media(max-width:1100px){.practice-settings{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:550px){.practice-settings{grid-template-columns:1fr}.song-pickers{align-items:stretch;flex-direction:column}.song-pickers #song-choice{width:100%;min-width:0;max-width:none}.song-title-row h3{font-size:17px}}

.instrument-setup{margin:12px 0 16px;padding:14px 16px;border:1px solid var(--border);background:var(--surface3);border-radius:14px}
.instrument-heading{display:flex;align-items:start;justify-content:space-between;gap:12px}.instrument-heading strong{font-size:13px}.instrument-heading p{font-size:11px;margin:5px 0 0}
.instrument-pill{display:inline-block;font-size:11px;font-weight:750;color:var(--muted);border:1px solid var(--border);background:var(--surface);padding:8px 10px;border-radius:999px;white-space:normal}
.instrument-pill[data-status="ready"]{color:var(--success);border-color:var(--success)}.instrument-settings{display:flex;flex-wrap:wrap;align-items:end;gap:12px;margin:13px 0 8px}
.instrument-settings>div{min-width:0}.instrument-settings label{display:block;font-size:11px;color:var(--muted);font-weight:750;margin-bottom:5px}
.instrument-settings select{min-width:170px;max-width:290px;width:100%}.instrument-stats{display:flex;flex-wrap:wrap;align-items:center;gap:8px 14px;font-size:12px;color:var(--muted);min-height:40px}
.instrument-help{font-size:12px;color:var(--muted);padding-top:7px}.instrument-help summary{cursor:pointer;font-weight:800;color:var(--text)}.instrument-help ol{padding-left:20px;line-height:1.7;margin-bottom:10px}.instrument-help li{margin:5px 0}
@media(max-width:650px){.instrument-heading{flex-direction:column}.instrument-settings{align-items:stretch;flex-direction:column}.instrument-settings>div,.instrument-settings select{width:100%;max-width:none}}

/* v0.4: musical notation, reading, score workbench */
.notation-section{border:1px solid var(--border);border-radius:14px;background:var(--surface3);padding:12px 15px;margin-top:15px}
.notation-section summary{font-size:12px;color:var(--text);font-weight:800;cursor:pointer;line-height:1.5}
.notation-help{color:var(--soft);font-size:11px;margin:8px 0 0;line-height:1.55}
.notation-svg{width:100%;max-width:100%;min-width:0;overflow:hidden;position:relative}
.notation-svg svg{display:block;width:100%;height:auto;max-height:308px;color:var(--text)}
.notation-svg svg .staff-line{stroke:var(--soft);opacity:.6;stroke-width:1.15}
.notation-svg svg .ledger{stroke:var(--muted);stroke-width:1.35}
.notation-svg svg .note-head{fill:var(--text);stroke:var(--text)}
.notation-svg svg .note-head.half{fill:var(--surface3)}
.notation-svg svg .staff-note.done .note-head{fill:var(--success);stroke:var(--success)}
.notation-svg svg .staff-note.current .note-head{fill:var(--accent);stroke:var(--accent)}
.notation-svg svg .staff-note.current .note-head.half{fill:var(--surface3)}
.notation-svg svg .staff-note.future{opacity:.7}
.notation-svg svg .staff-note.done .staff-stem{stroke:var(--success)}
.notation-svg svg .staff-note.current .staff-stem{stroke:var(--accent)}
.notation-svg svg .staff-note .staff-stem{stroke:var(--text);stroke-width:1.8}
.notation-svg svg .current-marker{fill:var(--accent);opacity:.14}
.notation-svg svg .clef{font-family:'Segoe UI Symbol','Noto Music','Bravura',serif;fill:var(--text)}
.notation-svg svg .time-sig{font-family:Georgia,serif;font-weight:bold;fill:var(--muted)}
.notation-svg svg .score-label{font:11px ui-sans-serif,system-ui,sans-serif;fill:var(--muted)}
.reading-settings{display:grid;grid-template-columns:2fr 1.3fr 1.1fr;gap:9px;margin-bottom:15px}
.reading-settings>div{background:var(--surface3);border:1px solid var(--border);border-radius:12px;padding:11px;min-width:0}
.reading-settings label{display:block;font-size:11px;font-weight:800;color:var(--muted);margin-bottom:8px}
.reading-settings select{width:100%;max-width:none;min-width:0}
.reading-card{border:1px solid var(--border);background:var(--surface3);border-radius:15px;padding:16px;overflow:hidden}
.reading-card .notation-svg{background:var(--surface);border-radius:10px;border:1px solid var(--border)}
.reading-card .notation-svg svg{max-height:340px}
.reading-caption{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:7px;font-size:14px}
.reading-description{font-size:12px;line-height:1.55;margin:5px 0 11px}
.reading-key{display:flex;gap:15px;flex-wrap:wrap;color:var(--soft);font-size:11px;margin-top:10px}
.reading-feedback{margin-top:12px}.reading-result{font-size:12px;font-variant-numeric:tabular-nums;color:var(--muted);margin-top:9px;padding:0 4px}
@media(max-width:780px){.reading-settings{grid-template-columns:1fr 1fr}.reading-settings>div:first-child{grid-column:1/-1}.reading-card{padding:10px}.reading-key{gap:7px 13px}}
@media(max-width:440px){.reading-settings{grid-template-columns:1fr}.reading-settings>div:first-child{grid-column:auto}.notation-section{padding:10px}.reading-caption{align-items:start;flex-direction:column}}

/* Version 0.5: single-purpose screens and unobtrusive navigation */
.top{position:relative;z-index:12;border-bottom:1px solid var(--border);padding-bottom:16px;margin-bottom:24px}
.top-links{flex-wrap:nowrap;gap:4px}.top-links>button,.more-menu>summary{font-size:13px;min-height:42px;padding:11px 17px;color:var(--muted);border:1px solid transparent;border-radius:11px;background:transparent;font-weight:740;white-space:nowrap;list-style:none;display:flex;align-items:center;justify-content:center;gap:5px;cursor:pointer}
.top-links>button:hover,.more-menu>summary:hover{background:var(--surface2);color:var(--text)}.top-links>button[aria-pressed="true"],.more-menu[data-active="true"]>summary{background:var(--surface2);border-color:var(--border);color:var(--text)}.more-menu{position:relative}.more-menu summary::-webkit-details-marker{display:none}.more-menu .menu-flyout{position:absolute;top:calc(100% + 7px);right:0;width:220px;background:var(--surface);border:1px solid var(--border);box-shadow:0 16px 42px var(--shadow);border-radius:15px;padding:8px;z-index:40}.more-menu .menu-flyout button{display:block;text-align:left;width:100%;padding:11px 13px;font-size:13px;border-radius:9px;border:0;background:transparent;color:var(--text)}.more-menu .menu-flyout button:hover,.more-menu .menu-flyout button[aria-pressed="true"]{background:var(--surface2)}
.layout:not([data-screen="learn"]){grid-template-columns:minmax(0,1fr)}.layout:not([data-screen="learn"])>.side{display:none}.layout{gap:17px}.workspace{width:100%}.workspace>.panel{min-width:0}.intro{display:none}
.home-screen{padding:clamp(25px,3.4vw,49px)}.home-hero{display:grid;grid-template-columns:minmax(0,1.7fr) minmax(210px,0.7fr);align-items:center;gap:28px;padding:7px 0 35px;border-bottom:1px solid var(--border)}.home-hero h1{font-size:clamp(35px,4.4vw,58px);max-width:710px;margin:12px 0 14px}.home-hero p{color:var(--muted);font-size:15px;max-width:620px}.home-actions{display:flex;gap:9px;flex-wrap:wrap;margin-top:23px}.home-actions .btn{min-height:48px;font-size:13px;padding:12px 18px}.home-device{display:flex;flex-direction:column;align-items:start;gap:9px;border:1px solid var(--border);background:var(--surface3);border-radius:18px;padding:24px;min-height:212px}.home-device strong{font-size:20px}.home-device .quiet{min-height:34px;line-height:1.5}.home-device-icon{display:grid;place-items:center;width:39px;height:39px;border-radius:11px;background:var(--surface2);color:var(--accent);font-size:24px}.home-device .btn{margin-top:auto}.home-list-head{display:flex;align-items:baseline;justify-content:space-between;gap:12px;flex-wrap:wrap;margin:30px 0 16px}.home-list-head h2,.home-list-head h3{font-size:19px;letter-spacing:-.025em;margin:0}.home-cards{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:13px}.home-card{min-height:205px;display:flex;flex-direction:column;align-items:start;gap:14px;text-align:left;color:var(--text);padding:22px;border:1px solid var(--border);background:var(--surface3);border-radius:16px;transition:border-color .15s,transform .15s}.home-card:hover{border-color:var(--accent);transform:translateY(-2px)}.home-card-symbol{color:var(--accent);font-size:12px;font-weight:850;letter-spacing:.08em}.home-card strong{font-size:19px}.home-card>span:not(.home-card-symbol){font-size:12px;color:var(--muted);line-height:1.6}.home-card em{font-size:12px;font-style:normal;font-weight:750;color:var(--accent);margin-top:auto}.home-bottom{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;margin-top:22px}.text-link{background:transparent;border:0;color:var(--accent);font-size:12px;font-weight:750;padding:7px 10px}.text-link:hover{text-decoration:underline}
.settings-screen{max-width:1100px;margin:0 auto;width:100%}.settings-block{padding:19px 0 22px;border-top:1px solid var(--border);margin-top:15px}.settings-block h3{margin:0 0 15px;font-size:17px;letter-spacing:-.02em}.settings-block .path-block{max-width:600px}.setting-title{display:flex;align-items:center;justify-content:space-between;gap:9px;flex-wrap:wrap}.settings-block .instrument-setup{margin-top:0}.settings-block .practice-settings{grid-template-columns:repeat(2,minmax(0,1fr))}.settings-block .practice-settings select{width:100%}.settings-privacy{margin-bottom:0}.settings-screen .view-intro{margin-bottom:28px}.settings-screen #settings-midi-status{min-height:20px}
#view-progress .metrics{margin:25px 0 24px}.progress-units{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.progress-unit{border:1px solid var(--border);border-radius:13px;padding:17px;background:var(--surface3)}.progress-unit strong{font-size:13px}.progress-unit p{font-size:12px;color:var(--muted);margin:7px 0 0}.progress-meter{height:5px;border-radius:99px;background:var(--surface2);margin-top:13px;overflow:hidden}.progress-meter>span{display:block;height:100%;background:var(--accent)}
.board{padding:18px 24px}.board-heading{margin-bottom:10px}.board .board-footer{padding-top:3px}.board .midi-status{flex-wrap:wrap}.board .instrument-setup,.board .practice-settings{display:none}.board .learning-meter{margin:7px 0;font-size:11px}.assistance-details{padding:5px 0 10px;color:var(--soft);font-size:11px}.assistance-details summary{cursor:pointer}.board[data-practice="physical"] .hint-shortcuts{display:none}
#keyboard-wrap[hidden]{display:none!important}.workspace>.panel[hidden]{display:none!important}
@media(max-width:1050px){.home-cards{grid-template-columns:repeat(2,minmax(0,1fr))}.home-hero{grid-template-columns:minmax(0,1.5fr) minmax(210px,.9fr)}}
@media(max-width:790px){.top{gap:10px}.home-hero{grid-template-columns:1fr}.home-device{min-height:unset}.settings-block .practice-settings{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:550px){.top{align-items:stretch}.brand-mark{width:40px;height:40px}.top-links{width:100%;display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:2px}.top-links>button,.more-menu>summary{font-size:11px;min-height:41px;padding:8px 3px;white-space:normal}.more-menu .menu-flyout{right:0}.home-screen{padding:22px 17px}.home-hero{gap:21px;padding-bottom:22px}.home-hero h1{font-size:36px}.home-cards{grid-template-columns:repeat(2,minmax(0,1fr));gap:9px}.home-card{min-height:196px;padding:15px;gap:10px}.home-card strong{font-size:16px}.home-card>span:not(.home-card-symbol){font-size:11px}.home-list-head{margin-top:23px}.settings-block .practice-settings,.progress-units{grid-template-columns:1fr}.settings-block .path-block{max-width:none}.settings-block .instrument-settings{align-items:stretch}}

/* v0.9 acoustic listening interface, intentionally compact */
.acoustic-panel{border:1px solid var(--border);background:var(--surface3);border-radius:14px;padding:15px 17px;margin:12px 0 16px}
.acoustic-panel[hidden]{display:none!important}
.acoustic-head{display:flex;justify-content:space-between;gap:12px;align-items:center;flex-wrap:wrap}
.acoustic-head strong{font-size:14px}
.acoustic-live{font-size:11px;border:1px solid var(--border);border-radius:999px;padding:6px 10px;color:var(--muted)}
.acoustic-live[data-listening="true"]{border-color:var(--success);color:var(--success)}
.acoustic-panel .quiet{margin:8px 0 10px}
.acoustic-actions{display:flex;gap:12px;align-items:center;flex-wrap:wrap}
.acoustic-note{font-size:12px;color:var(--muted);overflow-wrap:anywhere}
.acoustic-disclaimer{font-size:11px;color:var(--soft);line-height:1.5;margin:11px 0 0}
@media(max-width:550px){.acoustic-actions{align-items:stretch;flex-direction:column}.acoustic-actions button{width:100%}}

.plain-back-link{font-size:12px;font-weight:750;color:var(--muted);white-space:nowrap;text-decoration:none}.plain-back-link:hover{text-decoration:underline}

/* v0.33: contextual lesson journey and live first-try performance */
.lesson-wayfinding,.lesson-performance{display:flex;align-items:center;flex-wrap:wrap;gap:9px 18px}
.lesson-wayfinding{padding:10px 12px;border:1px solid var(--border);background:var(--surface3);border-radius:12px;margin:9px 0 12px;font-size:12px;color:var(--muted)}
.lesson-wayfinding span:first-child{font-weight:800;color:var(--accent)}
.lesson-performance{font-size:12px;color:var(--muted);margin:0 0 10px}
.lesson-performance span:first-child{font-weight:800;color:var(--text)}
#lesson-mastery-rule{margin-top:14px;font-size:12px;color:var(--muted)}
@media(max-width:790px){.lesson-wayfinding,.lesson-performance{align-items:flex-start;gap:6px 12px}}