@import"https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;600;700&family=Inter:wght@400;500;600;700&display=swap";:root{--bg-primary: #0b0f19;--bg-surface: #0f172a;--bg-surface-elevated: #1e293b;--bg-surface-muted: #141e33;--bg-overlay: rgba(11, 15, 25, .85);--border-subtle: #1e293b;--border-muted: #334155;--border-strong: #475569;--border-cyan: rgba(56, 189, 248, .4);--text-primary: #f1f5f9;--text-secondary: #cbd5e1;--text-muted: #94a3b8;--text-faint: #64748b;--accent-cyan: #38bdf8;--accent-cyan-hover: #0284c7;--accent-cyan-light: #7dd3fc;--accent-emerald: #34d399;--accent-amber: #f59e0b;--accent-rose: #f43f5e;--accent-indigo: #818cf8;--font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;--font-mono: "JetBrains Mono", "Fira Code", Menlo, Consolas, monospace;--radius-sm: 6px;--radius-md: 10px;--radius-lg: 16px;--radius-full: 9999px;--shadow-sm: 0 1px 2px rgba(0, 0, 0, .3);--shadow-md: 0 4px 6px -1px rgba(0, 0, 0, .4);--shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, .5);--shadow-glow-cyan: 0 0 14px rgba(56, 189, 248, .3);--tap-target-min: 48px;--safe-top: env(safe-area-inset-top, 0px);--safe-bottom: env(safe-area-inset-bottom, 0px);--safe-left: env(safe-area-inset-left, 0px);--safe-right: env(safe-area-inset-right, 0px)}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html{font-family:var(--font-sans);background-color:var(--bg-primary);color:var(--text-primary);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;text-size-adjust:100%}body{min-height:100vh;min-height:100dvh;display:flex;flex-direction:column;align-items:center;padding:calc(1rem + var(--safe-top)) calc(1rem + var(--safe-right)) calc(1.5rem + var(--safe-bottom)) calc(1rem + var(--safe-left));overflow-x:hidden}::-webkit-scrollbar{height:8px;width:8px}::-webkit-scrollbar-track{background:var(--bg-surface)}::-webkit-scrollbar-thumb{background:var(--border-muted);border-radius:var(--radius-sm)}::-webkit-scrollbar-thumb:hover{background:var(--border-strong)}.font-mono-tab{font-family:var(--font-mono)}:focus-visible{outline:2px solid var(--accent-cyan);outline-offset:2px}.visually-hidden{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.app-container{width:100%;max-width:1040px;display:flex;flex-direction:column;gap:1.5rem}.app-header{text-align:center;margin-bottom:.5rem}.badge-tag{display:inline-flex;align-items:center;gap:.5rem;padding:.35rem .85rem;border-radius:var(--radius-full);background:#38bdf81a;border:1px solid var(--border-cyan);color:var(--accent-cyan);font-size:.75rem;font-weight:600;text-transform:uppercase;letter-spacing:.05em;margin-bottom:.75rem}.app-title{font-size:clamp(1.75rem,5vw,2.75rem);font-weight:800;letter-spacing:-.03em;background:linear-gradient(135deg,var(--accent-cyan-light) 0%,var(--accent-indigo) 50%,var(--accent-emerald) 100%);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;line-height:1.2}.app-subtitle{margin-top:.5rem;color:var(--text-muted);font-size:clamp(.875rem,2vw,1rem);max-width:640px;margin-left:auto;margin-right:auto;line-height:1.5}.card{background:#0f172ad9;border:1px solid var(--border-subtle);border-radius:var(--radius-lg);padding:1.5rem;box-shadow:var(--shadow-lg);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px)}.grid-cols-controls{display:grid;grid-template-columns:repeat(1,minmax(0,1fr));gap:1rem}@media (min-width: 640px){.grid-cols-controls{grid-template-columns:repeat(3,minmax(0,1fr))}}.tracks-full-width-section{display:flex;flex-direction:column;gap:.65rem;width:100%}.hidden{display:none!important}.dropzone{border:2px dashed var(--border-muted);border-radius:var(--radius-md);padding:2rem 1.5rem;text-align:center;cursor:pointer;background:#0b0f1980;transition:all .2s ease;min-height:120px;display:flex;flex-direction:column;align-items:center;justify-content:center}.dropzone:hover,.dropzone.drag-active{border-color:var(--accent-cyan);background:#38bdf80f}.btn{display:inline-flex;align-items:center;justify-content:center;gap:.5rem;min-height:var(--tap-target-min);padding:.65rem 1.25rem;border-radius:var(--radius-md);font-size:.875rem;font-weight:600;cursor:pointer;border:1px solid transparent;transition:all .15s ease;user-select:none;-webkit-user-select:none;touch-action:manipulation}.btn:active{transform:scale(.97)}.btn:disabled{opacity:.45;cursor:not-allowed;transform:none}.btn-primary{background:linear-gradient(135deg,var(--accent-cyan),#4f46e5);color:#fff;box-shadow:0 4px 14px #38bdf840}.btn-primary:hover:not(:disabled){filter:brightness(1.1)}.btn-secondary{background:var(--bg-surface-elevated);border-color:var(--border-muted);color:var(--accent-cyan)}.btn-secondary:hover:not(:disabled){background:var(--border-muted)}.btn-practice{background:linear-gradient(135deg,#d97706,#b45309);color:#fff;border-color:#f59e0b66}.btn-practice.active{background:linear-gradient(135deg,#059669,#047857)}.select-input,.range-input{width:100%;min-height:42px;background:var(--bg-primary);border:1px solid var(--border-subtle);border-radius:var(--radius-sm);padding:.5rem .75rem;color:var(--text-primary);font-size:.875rem}.select-input:focus{border-color:var(--accent-cyan);outline:none}.range-input{accent-color:var(--accent-cyan);cursor:pointer}#toast-container{position:fixed;bottom:calc(1.5rem + var(--safe-bottom));right:calc(1.5rem + var(--safe-right));z-index:9999;display:flex;flex-direction:column;gap:.5rem;pointer-events:none}.toast{pointer-events:auto;background:var(--bg-surface-elevated);border:1px solid var(--border-muted);color:var(--text-primary);padding:.75rem 1rem;border-radius:var(--radius-md);box-shadow:var(--shadow-lg);font-size:.85rem;display:flex;align-items:center;gap:.5rem;animation:slide-up .2s ease-out}.toast.toast-success{border-color:var(--accent-emerald)}.toast.toast-error{border-color:var(--accent-rose)}.floating-play-btn{position:fixed;bottom:calc(1.5rem + var(--safe-bottom));left:50%;transform:translate(-50%);z-index:900;display:flex;align-items:center;gap:.5rem;background:linear-gradient(135deg,#0284c7,#38bdf8);color:#030712;font-family:var(--font-sans);font-size:.875rem;font-weight:700;padding:.75rem 1.25rem;border-radius:99px;border:1px solid rgba(255,255,255,.35);box-shadow:0 8px 24px #38bdf866,0 4px 12px #0009;cursor:pointer;transition:transform .2s ease,opacity .2s ease,box-shadow .2s ease;touch-action:manipulation;min-height:48px}.floating-play-btn:hover{transform:translate(-50%) translateY(-2px) scale(1.04);box-shadow:0 12px 28px #38bdf88c,0 6px 16px #000000b3}.floating-play-btn:active{transform:translate(-50%) translateY(0) scale(.97)}.floating-play-btn.hidden{opacity:0;pointer-events:none;transform:translate(-50%) translateY(16px)}@keyframes slide-up{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.tab-board-container{scroll-behavior:auto!important;will-change:scroll-position;-webkit-overflow-scrolling:touch}.string-header-col{width:56px;flex-shrink:0;background:#0f172af2;border-right:1px solid var(--border-subtle);z-index:20;display:flex;flex-direction:column;justify-content:space-between;padding:1.5rem .5rem;-webkit-user-select:none;user-select:none}.string-badge{display:flex;align-items:center;justify-content:space-between;font-size:.75rem;font-family:var(--font-mono);font-weight:700;color:var(--text-secondary)}.string-badge .string-name{color:var(--accent-cyan)}.string-badge .string-num{color:var(--text-faint);font-size:.65rem}.playhead-line{will-change:transform;pointer-events:none}.fret-marker{position:absolute;transform:translate(-50%,-50%);width:26px;height:26px;border-radius:var(--radius-full);background:var(--bg-primary);border:2px solid var(--track-color, var(--accent-cyan));color:var(--track-color, var(--accent-cyan));font-size:.75rem;font-weight:700;font-family:var(--font-mono);display:flex;align-items:center;justify-content:center;-webkit-user-select:none;user-select:none;cursor:pointer;z-index:10;box-shadow:0 0 8px #000000b3,inset 0 0 4px var(--track-color, transparent);transition:transform .15s ease,background-color .15s ease,color .15s ease,box-shadow .15s ease;touch-action:manipulation}.fret-marker:hover{transform:translate(-50%,-50%) scale(1.22);background-color:var(--track-color, var(--accent-cyan))!important;color:#090d16!important;box-shadow:0 0 14px var(--track-color, var(--accent-cyan));z-index:22}.fret-marker.active-hit{box-shadow:0 0 16px var(--track-color, var(--accent-cyan)),0 0 6px #fff;border-color:#fff!important;background-color:var(--track-color, var(--accent-cyan))!important;color:#090d16!important;transform:translate(-50%,-50%) scale(1.28);z-index:25}.fret-marker.practice-target{filter:drop-shadow(0 0 12px var(--accent-amber));border-color:var(--accent-amber)!important;background-color:#78350f!important;color:#fef08a!important;transform:translate(-50%,-50%) scale(1.3);animation:pulse-target 1.2s infinite ease-in-out;z-index:30}@keyframes pulse-target{0%,to{box-shadow:0 0 #f59e0bb3}50%{box-shadow:0 0 0 8px #f59e0b00}}.fret-marker.practice-success{filter:drop-shadow(0 0 14px var(--accent-emerald))!important;border-color:var(--accent-emerald)!important;background-color:#064e3b!important;color:#6ee7b7!important;transform:translate(-50%,-50%) scale(1.35)!important;transition:all .25s ease-out}.practice-hud{margin-top:1rem;padding:1rem;border-radius:var(--radius-md);background:#0b0f19e6;border:1px solid rgba(245,158,11,.35);display:flex;flex-direction:column;gap:.75rem}.practice-header{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:.75rem}.practice-status-lead{display:flex;align-items:center;gap:.5rem;font-size:.75rem}.ping-dot{width:10px;height:10px;border-radius:var(--radius-full);background-color:var(--accent-amber);animation:ping 1.5s cubic-bezier(0,0,.2,1) infinite}@keyframes ping{75%,to{transform:scale(2);opacity:0}}.grid-practice-cards{display:grid;grid-template-columns:1fr;gap:.75rem}@media (min-width: 768px){.grid-practice-cards{grid-template-columns:repeat(3,minmax(0,1fr))}}.practice-card{padding:.75rem;border-radius:var(--radius-sm);background:var(--bg-surface);border:1px solid var(--border-subtle);display:flex;align-items:center;justify-content:space-between}.pitch-meter-container{position:relative;width:100%;height:10px;background:var(--bg-surface-elevated);border-radius:var(--radius-full);overflow:hidden;display:flex;align-items:center}.pitch-meter-center{position:absolute;left:50%;margin-left:-2px;top:0;bottom:0;width:4px;background:var(--accent-emerald);z-index:10}.pitch-needle{position:absolute;top:0;bottom:0;width:10px;border-radius:var(--radius-full);background:var(--accent-cyan);transition:all .08s ease;transform:translate(-50%)}.timeline-overview-container{display:flex;flex-direction:column;gap:.4rem;background:#0b0f19b3;padding:.75rem;border-radius:var(--radius-md);border:1px solid var(--border-subtle)}.timeline-bar{position:relative;width:100%;height:28px;background:var(--bg-surface);border:1px solid var(--border-subtle);border-radius:var(--radius-sm);cursor:pointer;overflow:hidden;-webkit-user-select:none;user-select:none}.timeline-bar:hover{border-color:var(--border-cyan)}