:root{color-scheme:dark;--bg:#090909;--panel:#151515;--panel2:#1b1b1b;--line:#303030;--line-soft:#252525;--gold:#d5ad64;--gold-bright:#edcf8d;--text:#f2f0eb;--muted:#a7a39b;--dim:#77736b;--green:#75c99b;--red:#ef8585;--blue:#a9c6d6;--radius:18px;font-family:'DM Sans',system-ui,-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;font-synthesis:none;text-rendering:optimizeLegibility}*{box-sizing:border-box}body{margin:0;min-width:320px;background:radial-gradient(ellipse at 50% -28%,#252019 0,transparent 46%),var(--bg);color:var(--text)}button,input,select{font:inherit}button{color:inherit}.app-shell{max-width:1740px;min-height:100vh;margin:auto;padding:22px clamp(18px,3vw,48px) 16px;display:flex;flex-direction:column}.topbar{display:flex;justify-content:space-between;align-items:center;margin-bottom:22px}.brand{display:flex;align-items:center;gap:16px}.brand-mark{width:74px;height:74px;object-fit:contain;border-radius:15px;background:#000;border:1px solid #302817;box-shadow:0 8px 28px #0007}.eyebrow,.section-kicker{color:var(--gold);font-size:10px;font-weight:700;letter-spacing:.17em;margin:0 0 5px}.brand h1{font-family:'Playfair Display',Georgia,serif;font-size:clamp(25px,2.4vw,34px);font-weight:600;letter-spacing:.005em;margin:0;line-height:1.08}.subtitle{margin:5px 0 0;color:var(--muted);font-size:13px}.panel{background:linear-gradient(155deg,#191919,#121212 75%);border:1px solid #2c2b28;border-radius:var(--radius);box-shadow:0 16px 38px #0003}.layout{display:grid;grid-template-columns:minmax(260px,310px) minmax(0,1fr);gap:18px;flex:1}.settings-panel{padding:20px 18px;display:flex;flex-direction:column;gap:18px}.panel-heading,.score-heading,.midi-top{display:flex;align-items:center;justify-content:space-between;gap:12px}.panel h2,.score-heading h2,.dialog-head h2{margin:0;font-size:20px;font-weight:600;letter-spacing:-.025em}.badge{padding:5px 10px;border:1px solid #4a402a;border-radius:999px;background:#292317;color:var(--gold-bright);font-size:11px;font-weight:600}.setting-group{padding:0;margin:0;border:0;min-width:0}.setting-group legend,.field-label{display:block;font-size:12px;font-weight:600;color:#d8d6d0;margin:0 0 9px}.segmented{display:flex;gap:4px;background:#0d0d0d;border:1px solid #30302e;border-radius:11px;padding:4px}.segment{min-height:35px;flex:1;border:0;background:transparent;border-radius:8px;color:#aaa69d;font-size:12px;font-weight:600;cursor:pointer;transition:background .16s,color .16s,transform .12s}.segment:hover{color:white}.segment.selected{background:#332b1e;color:#f3d89d;box-shadow:inset 0 0 0 1px #695634}.segment:active{transform:translateY(1px)}select{width:100%;height:43px;padding:0 12px;background:#101010;border:1px solid #3a3935;border-radius:10px;color:var(--text);font-size:13px;outline:none}select:focus-visible,input:focus-visible,button:focus-visible{outline:2px solid var(--gold);outline-offset:2px}.toggle-line{display:flex;justify-content:space-between;align-items:center;gap:12px}.toggle-line .field-label{margin:0}.switch{appearance:none;width:42px;height:24px;flex:0 0 42px;border-radius:99px;background:#42413e;position:relative;cursor:pointer;transition:background .18s;border:1px solid #66645d}.switch::after{content:'';position:absolute;left:3px;top:3px;width:16px;height:16px;background:#e4e1da;border-radius:50%;transition:transform .18s}.switch:checked{background:#9c783e;border-color:#c19b5c}.switch:checked::after{transform:translateX(18px);background:#fff6e3}.tempo-controls{padding:12px 0 0}.tempo-readout{display:flex;justify-content:space-between;color:var(--muted);font-size:12px;margin-bottom:8px}.tempo-readout strong{color:var(--gold-bright);font-size:13px}input[type=range]{width:100%;accent-color:var(--gold);height:18px;margin:0}.range-labels{display:flex;justify-content:space-between;color:var(--dim);font-size:10px;margin-top:-1px}.helper-text{color:var(--muted);font-size:11px;line-height:1.45;margin:8px 0 0}.compact{padding-top:12px;margin-top:12px;border-top:1px solid var(--line-soft);font-size:11px;color:#d6d2ca}.compact .switch{transform:scale(.88);transform-origin:right center}.sound-card{display:flex;align-items:center;justify-content:space-between;padding:12px 12px;background:#1d1b17;border:1px solid #403624;border-radius:12px}.sound-copy{display:flex;align-items:center;gap:10px}.sound-copy strong,.sound-copy small{display:block}.sound-copy strong{font-size:11px}.sound-copy small{margin-top:3px;color:var(--muted);font-size:10px}.sound-icon{width:30px;height:30px;border-radius:9px;display:grid;place-items:center;background:#302719;color:var(--gold-bright);font-size:17px}.midi-card{padding:13px;background:#101010;border:1px solid #30302e;border-radius:13px}.midi-card h3{font-size:13px;margin:2px 0 0}.midi-top .section-kicker{font-size:9px}.status-dot{width:8px;height:8px;border-radius:50%;background:#777;box-shadow:0 0 0 4px #7772}.status-dot.connected{background:var(--green);box-shadow:0 0 0 4px #75c99b22}.outline-button{min-height:36px;padding:0 12px;background:transparent;border:1px solid #514c42;border-radius:9px;color:#e7d8b8;font-size:11px;font-weight:600;cursor:pointer}.outline-button:hover{background:#2b261d}.midi-card .outline-button{width:100%;margin-top:12px}.privacy-note{margin:auto 0 0;color:#918c82;font-size:10px;line-height:1.5}.privacy-note span{color:var(--gold);padding-right:5px}.practice-column{min-width:0;display:flex;flex-direction:column;gap:14px}.score-panel{padding:18px 20px 12px;flex:1;display:flex;flex-direction:column;min-height:350px}.score-heading{align-items:flex-start}.score-heading h2{font-size:18px}.score-meta{display:flex;gap:7px;align-items:center;flex-wrap:wrap;justify-content:flex-end}.score-meta>span{padding:6px 9px;border-radius:99px;border:1px solid #35332e;color:#bdb8ae;font-size:10px}.score-meta .note-mode-chip{color:var(--gold-bright);border-color:#54462f;background:#261f15}.score-wrap{position:relative;flex:1;min-height:220px;margin:8px 0 2px;display:grid;place-items:center;overflow:hidden}.staff-svg{position:absolute;inset:0;width:100%;height:100%;overflow:visible}.staff-svg .staff-line{stroke:#d2cfc6;stroke-width:1.4;opacity:.83}.staff-svg .clef{fill:#e2dfd7}.staff-svg .ledger{stroke:#e2dfd7;stroke-width:1.5}.staff-svg .note-head{fill:#f3d89d;stroke:#f3d89d}.staff-svg .stem{stroke:#f3d89d;stroke-width:3;stroke-linecap:round}.staff-svg .accidental{fill:#f1e8d4;font-family:serif}.score-placeholder{position:relative;z-index:1;display:flex;flex-direction:column;align-items:center;gap:5px;text-align:center;padding:20px;background:linear-gradient(90deg,transparent,#151515cc 18%,#151515cc 82%,transparent);pointer-events:none}.score-placeholder strong{font-size:14px}.score-placeholder span:last-child{font-size:11px;color:var(--muted)}.placeholder-note{font-family:Georgia,serif;font-size:32px;color:var(--gold);line-height:1;margin-bottom:2px}.score-bottom{border-top:1px solid var(--line-soft);padding-top:10px;display:flex;align-items:center;justify-content:space-between;gap:16px}.feedback-text{margin:0;color:#c7c2b8;font-size:12px;min-height:18px}.feedback-text.success{color:var(--green)}.feedback-text.error{color:var(--red)}.feedback-text.omit{color:#d5b56e}.metrics{display:flex;gap:9px}.metric{min-width:78px;padding:6px 10px;background:#101010;border:1px solid #292929;border-radius:9px;display:flex;align-items:center;justify-content:space-between;gap:10px;font-size:10px;color:var(--muted)}.metric strong{font-size:14px;color:#f1eee8;font-variant-numeric:tabular-nums}.metric.correct strong{color:var(--green)}.metric.wrong strong{color:var(--red)}.metric.omitted strong{color:#dfbd71}.piano-panel{padding:12px 14px 5px}.piano-topline{display:flex;align-items:center;justify-content:space-between;gap:10px;color:#e2ded6;font-size:12px;font-weight:600;margin:0 2px 10px}.muted,#pianoHint{color:var(--muted);font-size:10px;font-weight:400}.piano{height:clamp(104px,15vh,154px);position:relative;width:100%;overflow:hidden;border-radius:9px 9px 4px 4px;background:#111;touch-action:manipulation;user-select:none}.key{position:absolute;top:0;appearance:none;padding:0;cursor:pointer;transition:transform .075s,filter .075s,box-shadow .075s}.key.white{height:100%;background:linear-gradient(90deg,#dedbd5,#fffefa 15%,#f5f2eb 85%,#d1cec8);border:1px solid #9b9994;border-top:0;border-radius:0 0 4px 4px;box-shadow:inset 0 -5px 0 #c7c3bc,0 3px 4px #0008;z-index:1}.key.white:hover{filter:brightness(1.04)}.key.white.pressed,.key.white.flash{transform:translateY(3px);background:linear-gradient(90deg,#c7c7c3,#f0f0ec 20%,#dfdfdc 85%,#c0c0bc);box-shadow:inset 0 5px 9px #0003,0 0 0 #000}.key.white.flash.correct-key{background:linear-gradient(#e7f7ed,#bde4ca);border-color:#70aa83}.key.white.flash.wrong-key{background:linear-gradient(#fde9e9,#eeb4b4);border-color:#c36f6f}.key.black{height:63%;z-index:2;background:linear-gradient(100deg,#080808,#292929 35%,#121212 85%,#050505);border:1px solid #020202;border-radius:0 0 4px 4px;box-shadow:inset 0 -4px 1px #050505,0 4px 5px #0009}.key.black:hover{filter:brightness(1.25)}.key.black.pressed,.key.black.flash{transform:translateY(3px);background:linear-gradient(100deg,#212121,#4b4b4b 40%,#262626);box-shadow:inset 0 5px 8px #0007,0 0 0 #000}.key.black.flash.correct-key{outline:2px solid var(--green);outline-offset:-2px}.key.black.flash.wrong-key{outline:2px solid var(--red);outline-offset:-2px}.piano-caption{height:26px;display:grid;grid-template-columns:1fr 1fr 1fr;align-items:center;position:relative;color:#827e76;font-size:9px}.author-tag{justify-self:start}.middle-c-marker{justify-self:center;display:flex;flex-direction:column;align-items:center;color:#cfc5ad;font-size:9px;line-height:1}.arrow-up{width:0;height:0;border-left:5px solid transparent;border-right:5px solid transparent;border-bottom:6px solid var(--gold);margin-top:-2px}.piano-end-label{justify-self:end}.session-controls{display:flex;align-items:center;justify-content:center;gap:9px;flex-wrap:wrap}.primary-button,.secondary-button,.danger-button,.history-button,.quiet-button{min-height:41px;padding:0 17px;border-radius:10px;font-size:12px;font-weight:700;cursor:pointer;transition:filter .15s,transform .1s,border-color .15s}.primary-button{background:linear-gradient(135deg,#e3c47f,#bd9148);border:1px solid #e7c984;color:#18130b;box-shadow:0 5px 16px #0005}.secondary-button{background:#222;border:1px solid #48443c;color:#e8e3d8}.danger-button{background:#281717;border:1px solid #5c3636;color:#edb4b4}.history-button,.quiet-button{background:transparent;border:1px solid #393733;color:#c9c4bb}.primary-button:hover,.secondary-button:hover,.danger-button:hover,.history-button:hover,.quiet-button:hover{filter:brightness(1.15)}.primary-button:active,.secondary-button:active,.danger-button:active{transform:translateY(1px)}button:disabled{opacity:.42;cursor:not-allowed;filter:none}.button-symbol{margin-right:8px;font-size:11px}.footer{display:flex;justify-content:space-between;align-items:center;gap:12px;color:#77736b;font-size:9px;padding:12px 3px 0}.footer a{color:#a89a7e;text-decoration:none}.footer a:hover{text-decoration:underline}.history-dialog{width:min(740px,calc(100vw - 24px));max-height:min(86vh,780px);background:#151515;color:var(--text);border:1px solid #454139;border-radius:18px;padding:0;box-shadow:0 25px 100px #000b}.history-dialog::backdrop{background:#000a;backdrop-filter:blur(4px)}.dialog-head{display:flex;align-items:center;justify-content:space-between;padding:19px 22px;border-bottom:1px solid var(--line)}.dialog-head h2{margin-top:2px}.icon-button{width:34px;height:34px;border-radius:50%;background:#222;border:1px solid #414141;font-size:22px;line-height:1;cursor:pointer}.history-list{padding:12px 20px;max-height:55vh;overflow:auto}.empty-history{text-align:center;padding:34px 12px;color:var(--muted);font-size:13px}.history-row{display:grid;grid-template-columns:1.2fr 1fr 1fr 1fr 1fr;gap:10px;align-items:center;padding:12px 4px;border-bottom:1px solid #292929;font-size:11px;color:#d7d3ca}.history-row.header{color:var(--muted);font-size:9px;text-transform:uppercase;letter-spacing:.09em}.history-row .result-good{color:var(--green)}.history-row .result-bad{color:var(--red)}.dialog-actions{display:flex;justify-content:space-between;gap:10px;padding:14px 20px 18px;border-top:1px solid var(--line)}.toast{position:fixed;left:50%;bottom:24px;z-index:20;transform:translate(-50%,20px);padding:10px 15px;border-radius:10px;background:#26231d;border:1px solid #594a2f;color:#f1dfb8;font-size:12px;opacity:0;pointer-events:none;transition:opacity .2s,transform .2s}.toast.show{opacity:1;transform:translate(-50%,0)}
@media(max-width:1120px){.layout{grid-template-columns:1fr}.settings-panel{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));align-items:start;gap:14px}.panel-heading{grid-column:1/-1}.privacy-note{grid-column:1/-1}.midi-card{min-height:100%}.tempo-group{grid-row:span 2}.score-panel{min-height:360px}}
@media(max-width:650px){.app-shell{padding:12px 10px 10px}.topbar{margin-bottom:13px}.brand{gap:10px}.brand-mark{width:52px;height:52px;border-radius:12px}.brand h1{font-size:24px}.subtitle{font-size:11px}.eyebrow{font-size:8px}.layout{gap:10px}.settings-panel{padding:14px;grid-template-columns:1fr 1fr;gap:13px}.panel-heading{align-items:flex-start}.settings-panel .setting-group:nth-of-type(2),.settings-panel .setting-group:nth-of-type(3){grid-column:span 1}.tempo-group{grid-row:auto}.midi-card{grid-column:span 2}.sound-card{grid-column:span 2}.score-panel{padding:14px 10px 9px;min-height:315px}.score-heading h2{font-size:16px}.section-kicker{font-size:8px}.score-meta{gap:4px}.score-meta>span{font-size:9px;padding:5px 7px}.score-wrap{min-height:205px}.score-bottom{align-items:flex-start;flex-direction:column;gap:8px}.feedback-text{font-size:11px}.metrics{width:100%;gap:5px}.metric{flex:1;min-width:0;padding:6px 7px;gap:5px;font-size:9px}.metric strong{font-size:13px}.piano-panel{padding:9px 7px 3px}.piano-topline{font-size:10px;margin-bottom:7px}.piano-topline #pianoHint{display:none}.piano{height:104px}.piano-caption{height:22px}.session-controls{gap:6px}.primary-button,.secondary-button,.danger-button,.history-button{min-height:38px;padding:0 10px;font-size:10px}.button-symbol{margin-right:5px}.footer{flex-wrap:wrap;justify-content:center;text-align:center;font-size:8px}.history-row{grid-template-columns:1.25fr .7fr .7fr .7fr .7fr;font-size:9px;gap:4px}.history-row.header{font-size:8px}.history-list{padding:8px 12px}.dialog-head{padding:15px}.dialog-actions{padding:12px}.install-button{font-size:10px;padding:0 8px;min-height:34px}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{scroll-behavior:auto!important;transition:none!important;animation:none!important}}
@media(max-width:1120px){.layout{grid-template-columns:1fr}.settings-panel{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));align-items:start;gap:14px}.panel-heading{grid-column:1/-1}.privacy-note{grid-column:1/-1}.midi-card{min-height:100%}.tempo-group{grid-row:span 2}.score-panel{min-height:360px}}
@media(max-width:650px){.app-shell{padding:12px 10px 10px}.topbar{margin-bottom:13px}.brand{gap:10px}.brand-mark{width:52px;height:52px;border-radius:12px}.brand h1{font-size:24px}.subtitle{font-size:11px}.eyebrow{font-size:8px}.layout{gap:10px}.settings-panel{padding:14px;grid-template-columns:1fr 1fr;gap:13px}.panel-heading{align-items:flex-start}.settings-panel .setting-group:nth-of-type(2),.settings-panel .setting-group:nth-of-type(3){grid-column:span 1}.tempo-group{grid-row:auto}.midi-card{grid-column:span 2}.sound-card{grid-column:span 2}.score-panel{padding:14px 10px 9px;min-height:315px}.score-heading h2{font-size:16px}.section-kicker{font-size:8px}.score-meta{gap:4px}.score-meta>span{font-size:9px;padding:5px 7px}.score-wrap{min-height:205px}.score-bottom{align-items:flex-start;flex-direction:column;gap:8px}.feedback-text{font-size:11px}.metrics{width:100%;gap:5px}.metric{flex:1;min-width:0;padding:6px 7px;gap:5px;font-size:9px}.metric strong{font-size:13px}.piano-panel{padding:9px 7px 3px}.piano-topline{font-size:10px;margin-bottom:7px}.piano-topline #pianoHint{display:none}.piano{height:104px}.piano-caption{height:22px}.session-controls{gap:6px}.primary-button,.secondary-button,.danger-button,.history-button{min-height:38px;padding:0 10px;font-size:10px}.button-symbol{margin-right:5px}.footer{flex-wrap:wrap;justify-content:center;text-align:center;font-size:8px}.history-row{grid-template-columns:1.25fr .7fr .7fr .7fr .7fr;font-size:9px;gap:4px}.history-row.header{font-size:8px}.history-list{padding:8px 12px}.dialog-head{padding:15px}.dialog-actions{padding:12px}.install-button{font-size:10px;padding:0 8px;min-height:34px}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{scroll-behavior:auto!important;transition:none!important;animation:none!important}}
.key:disabled{opacity:1;cursor:default}
.staff-svg .note-answer .note-head,.staff-svg .note-answer .stem,.staff-svg .note-answer .ledger,.staff-svg .note-answer .accidental{transition:fill .14s ease,stroke .14s ease}
.staff-svg .note-answer.is-correct .note-head{fill:var(--green);stroke:var(--green)}
.staff-svg .note-answer.is-correct .stem,.staff-svg .note-answer.is-correct .ledger{stroke:var(--green)}
.staff-svg .note-answer.is-correct .accidental{fill:var(--green)}
.staff-svg .note-answer.is-wrong .note-head{fill:var(--red);stroke:var(--red)}
.staff-svg .note-answer.is-wrong .stem,.staff-svg .note-answer.is-wrong .ledger{stroke:var(--red)}
.staff-svg .note-answer.is-wrong .accidental{fill:var(--red)}
.score-placeholder[hidden]{display:none}