:root{--bg-color: #0f172a;--card-bg: rgba(30, 41, 59, .7);--accent-color: #38bdf8;--accent-glow: rgba(56, 189, 248, .4);--text-primary: #f8fafc;--text-secondary: #94a3b8;--success: #10b981;--error: #ef4444;--glass-border: rgba(255, 255, 255, .1)}*{margin:0;padding:0;box-sizing:border-box}body{font-family:Outfit,sans-serif;background-color:var(--bg-color);color:var(--text-primary);min-height:100vh;display:flex;justify-content:center;align-items:center;background-image:radial-gradient(circle at 10% 20%,rgba(56,189,248,.05) 0%,transparent 20%),radial-gradient(circle at 90% 80%,rgba(56,189,248,.05) 0%,transparent 20%);overflow-x:hidden}.app-container{width:100%;max-width:900px;padding:2rem;display:flex;flex-direction:column;gap:2rem;animation:fadeIn 1s ease-out}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}header{text-align:center}h1{font-size:3rem;font-weight:600;margin-bottom:.5rem;background:linear-gradient(to right,#fff,var(--accent-color));-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;letter-spacing:-.02em}.subtitle{color:var(--text-secondary);font-size:1.1rem}main{display:flex;flex-direction:column;gap:2rem}.visualizer-container{height:100px;width:100%;background:var(--card-bg);border-radius:1rem;border:1px solid var(--glass-border);overflow:hidden;position:relative}#waveform{width:100%;height:100%}.staff-card{background:var(--card-bg);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border-radius:1.5rem;border:1px solid var(--glass-border);padding:2rem;box-shadow:0 25px 50px -12px #00000080;display:flex;flex-direction:column;align-items:center;gap:1.5rem;transition:transform .3s ease}.staff-card:hover{transform:translateY(-5px)}#staff-container{width:100%;min-height:200px;display:flex;justify-content:center;background:transparent;border-radius:.75rem;padding:1rem}.current-note-display{display:flex;flex-direction:column;align-items:center;gap:.25rem}#note-name{font-size:4rem;font-weight:600;color:var(--accent-color);text-shadow:0 0 20px var(--accent-glow)}#note-frequency{color:var(--text-secondary);font-size:.9rem;font-family:monospace}.controls{display:flex;flex-direction:column;align-items:center;gap:1rem}.primary-btn{background:var(--accent-color);color:var(--bg-color);border:none;padding:1rem 2.5rem;font-size:1.1rem;font-weight:600;border-radius:9999px;cursor:pointer;display:flex;align-items:center;gap:.75rem;transition:all .3s cubic-bezier(.4,0,.2,1);box-shadow:0 10px 15px -3px var(--accent-glow)}.primary-btn:hover{transform:scale(1.05);box-shadow:0 20px 25px -5px var(--accent-glow)}.primary-btn:active{transform:scale(.95)}.primary-btn.listening{background:var(--error);box-shadow:0 10px 15px -3px #ef444466}.status-indicator{display:flex;align-items:center;gap:.5rem;color:var(--text-secondary);font-size:.9rem}.dot{width:8px;height:8px;border-radius:50%;background:var(--text-secondary)}.dot.active{background:var(--success);box-shadow:0 0 10px var(--success);animation:pulse 2s infinite}@keyframes pulse{0%{opacity:1}50%{opacity:.4}to{opacity:1}}footer{text-align:center;color:var(--text-secondary);font-size:.8rem;margin-top:1rem}