:root{--bg-color: #0a0a0a;--card-bg: #1a1a1a;--primary-color: #4ade80;--secondary-color: #facc15;--text-color: #ffffff;--text-muted: #a1a1aa;--danger: #ef4444;--warning: #f59e0b;--info: #3b82f6}*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}body{margin:0;padding:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;background-color:var(--bg-color);color:var(--text-color);overflow-x:hidden}#root{min-height:100vh;display:flex;flex-direction:column}.container{width:100%;max-width:500px;margin:0 auto;padding:20px;flex:1;display:flex;flex-direction:column}h1,h2,h3{margin:0 0 1rem;text-align:center}.text-center{text-align:center}.text-muted{color:var(--text-muted)}.big-button{width:100%;padding:20px;margin-bottom:15px;border:none;border-radius:12px;font-size:1.25rem;font-weight:700;cursor:pointer;display:flex;align-items:center;justify-content:center;gap:10px;transition:transform .1s,opacity .2s}.big-button:active{transform:scale(.98)}.big-button-primary{background-color:var(--primary-color);color:#000}.big-button-secondary{background-color:var(--card-bg);color:var(--text-color);border:1px solid #333}.big-button-danger{background-color:var(--danger);color:#fff}.card{background-color:var(--card-bg);padding:20px;border-radius:16px;margin-bottom:20px}.timer-display{font-size:5rem;font-weight:800;text-align:center;margin:20px 0;font-variant-numeric:tabular-nums}.status-badge{display:inline-block;padding:4px 12px;border-radius:999px;font-size:.875rem;font-weight:600;text-transform:uppercase}.badge-listening{background:var(--primary-color);color:#000}.badge-waiting{background:var(--secondary-color);color:#000}.badge-danger{background:var(--danger);color:#fff}.history-list{list-style:none;padding:0;margin:0}.history-item{display:flex;justify-content:space-between;align-items:center;padding:12px;border-bottom:1px solid #333}.history-item:last-child{border-bottom:none}.form-group{margin-bottom:20px}.form-group label{display:block;margin-bottom:8px;color:var(--text-muted)}.form-group input[type=number],.form-group select{width:100%;padding:12px;background:#2a2a2a;border:1px solid #444;color:#fff;border-radius:8px;font-size:1rem}.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:15px}