:root{--bg:#14151a;--panel:#1d1f26;--panel-border:#2c2f38;--text:#e8e9ee;--text-dim:#9a9ea8;--green:#2f8f4e;--green-dim:#1e5c34;--gold:#e0a13c;--yellow:#f2c230;--red:#c23b30;--red-dim:#6e211b;--accent:var(--green);--accent-dim:var(--green-dim);--active-note:var(--gold);--open-note:#4a4d57;--rosewood:#3f2418;--rosewood-light:#5c3524;--fret-wire:#cabfae;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif}*{box-sizing:border-box}[hidden]{display:none!important}body{background:var(--bg);color:var(--text);margin:0}#app{max-width:1280px;margin:0 auto;padding:20px 20px 60px}.app-header-row{justify-content:space-between;align-items:center;gap:16px;margin-bottom:8px;display:flex}.app-header h1{color:var(--text);margin:0;font-size:1.6rem;font-weight:800}.app-logo{flex-shrink:0;width:auto;height:56px}.title-gradient{background:linear-gradient(to right, var(--red), var(--yellow), var(--green));color:#0000;-webkit-text-fill-color:transparent;-webkit-background-clip:text;background-clip:text}.app-header:after{content:"";background:linear-gradient(to right, var(--red), var(--yellow), var(--green));border-radius:2px;width:64px;height:4px;margin-bottom:14px;display:block}.source-switcher{gap:8px;margin-bottom:14px;display:flex}.source-btn{background:var(--panel);color:var(--text-dim);cursor:pointer;border:1px solid #4a2c26;border-radius:8px;flex:1;padding:10px 12px;font-size:.95rem}.source-btn:hover:not(.active){border-color:var(--red)}.source-btn.active{border-color:var(--red);color:var(--text);background:#2a1614}.uploads{grid-template-columns:repeat(3,1fr);gap:8px;margin-bottom:14px;display:grid}@media (width<=640px){.uploads{grid-template-columns:repeat(2,1fr)}}.upload-field{background:var(--panel);border:1px solid var(--gold);color:var(--text-dim);border-radius:8px;flex-direction:column;gap:6px;min-width:0;padding:10px 12px;font-size:.85rem;display:flex}.upload-field input{color:var(--text)}.transport{background:var(--panel);border:1px solid var(--panel-border);border-radius:8px;margin-bottom:10px;padding:14px 16px}#play-pause-btn{background:var(--accent);color:#eafff0;cursor:pointer;border:none;border-radius:6px;margin-bottom:8px;padding:8px 20px;font-weight:600}#play-pause-btn:disabled{background:var(--accent-dim);color:#6b6b6b;cursor:not-allowed}input[type=range],input[type=checkbox]{accent-color:var(--accent)}.progress-row{font-variant-numeric:tabular-nums;color:var(--text-dim);align-items:center;gap:10px;margin-bottom:8px;font-size:.85rem;display:flex}.progress-row input[type=range]{flex:1}.speed-row{color:var(--text-dim);align-items:center;gap:10px;font-size:.85rem;display:flex}.speed-row input[type=range]{flex:1;max-width:260px}.loop-controls,.gp-loop-controls{flex-wrap:wrap;align-items:center;gap:8px;display:flex}.loop-controls{background:var(--panel);border:1px solid var(--panel-border);border-radius:8px;margin-bottom:10px;padding:12px 16px}.loop-controls button,.gp-loop-controls button{border:1px solid var(--panel-border);color:var(--text);cursor:pointer;background:#262a33;border-radius:6px;padding:6px 12px;font-size:.85rem}.loop-controls button:disabled,.gp-loop-controls button:disabled{color:#55585f;cursor:not-allowed}.loop-display{color:var(--text-dim);margin-left:auto;font-size:.8rem}.gp-section{background:var(--panel);border:1px solid var(--panel-border);border-radius:8px;margin-bottom:10px;padding:14px 16px}.gp-toolbar{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:8px 24px;margin-bottom:10px;display:flex}.notation-toggles{flex-wrap:wrap;gap:8px 24px;display:flex}.sync-offset-row{color:var(--text-dim);align-items:center;gap:10px;margin-bottom:10px;font-size:.85rem;display:flex}.sync-offset-row input[type=range]{flex:1;max-width:260px}.sync-offset-row span{font-variant-numeric:tabular-nums;min-width:3.5em}.notation-toggle{color:var(--text-dim);cursor:pointer;align-items:center;gap:8px;width:fit-content;font-size:.85rem;display:flex}.notation-toggle:has(input:disabled){opacity:.5;cursor:not-allowed}.gp-practice-view{position:sticky;top:12px}.fretboard-wrap{margin-bottom:16px;overflow-x:auto}.fretboard-empty{color:var(--text-dim);font-size:.9rem}.fretboard{background:linear-gradient(180deg, var(--rosewood-light), var(--rosewood));border:1px solid #2a160e;border-radius:6px;flex-direction:column;gap:4px;min-width:640px;padding:10px 8px;display:flex}.fretboard-row{align-items:center;gap:6px;display:flex}.fretboard-string-label{color:#e8d9c8;text-align:right;flex-shrink:0;width:32px;font-size:.75rem}.fretboard-frets{flex:1;gap:2px;display:flex}.fretboard-fret{border:none;border-right:1px solid var(--fret-wire);color:#d9c6b3;background:0 0;flex:1;justify-content:center;align-items:center;height:22px;font-size:.65rem;display:flex}.fretboard-fret-open{color:#f0e6d8;border-right:3px solid #f0e6d8;font-weight:600}.fretboard-fret.active{background:var(--active-note);color:#1a1400;border-radius:3px}.fretboard-marker-row{height:16px}.fretboard-marker-cell{flex:1;justify-content:center;align-items:center;gap:2px;display:flex}.fretboard-marker-cell-double{flex-direction:column}.fretboard-marker-dot{opacity:.55;background:#f0e6d8;border-radius:50%;width:6px;height:6px}.fretboard-marker-number{color:#f0e6d8;opacity:.75;font-size:.65rem;font-weight:600}.notation-scroll{background:#f4f2ee;border-radius:6px;max-height:calc(100vh - 260px);overflow:auto}.alphatab-main{padding:12px}.at-cursor-bar{background:#2f8f4e2e}.at-cursor-beat{background:var(--red);width:3px!important}.at-highlight *{fill:var(--red);stroke:var(--red)}.at-selection div{background:#e0a13c47}.status-line{color:var(--text-dim);min-height:1.2em;font-size:.8rem}