:root{--bg-color: #f0f4f8;--text-color: #2d3748;--primary-color: #6b46c1;--secondary-color: #ed8936;--accent-color: #38b2ac;--card-bg: #ffffff;--font-main: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;--font-display: "Comic Sans MS", "Chalkboard SE", sans-serif}body{margin:0;padding:0;font-family:var(--font-main);background:var(--bg-color);color:var(--text-color);display:flex;justify-content:center;align-items:center;min-height:100vh}#app{background:var(--card-bg);padding:2rem;border-radius:20px;box-shadow:10px 10px 0 var(--text-color);text-align:center;max-width:400px;width:90%;border:4px solid var(--text-color)}h1{font-family:var(--font-display);color:var(--primary-color);font-size:2.5rem;margin-bottom:1rem;text-transform:uppercase;letter-spacing:2px}.timer-display{font-family:Courier New,Courier,monospace;font-size:5rem;font-weight:700;margin:1.5rem 0;color:var(--text-color);background:#edf2f7;border-radius:10px;padding:.5rem;border:4px dashed var(--secondary-color)}.controls-container{display:flex;justify-content:center;gap:1rem;margin-bottom:2rem}.input-group{display:flex;flex-direction:column;align-items:center}label{font-weight:700;margin-bottom:.5rem;font-size:.9rem}input[type=number]{width:70px;padding:.5rem;font-size:1.2rem;border:2px solid var(--text-color);border-radius:8px;text-align:center;background:#fff}.sound-selection{margin-bottom:1.5rem}.select-wrapper{display:flex;gap:.5rem;align-items:center}select{flex-grow:1;padding:.8rem;font-size:1rem;border:3px solid var(--primary-color);border-radius:12px;background:#fff;cursor:pointer;font-weight:700;color:var(--primary-color)}.btn-small{padding:.6rem 1rem;font-size:1.2rem;border:3px solid var(--primary-color);background:var(--bg-color);border-radius:12px;cursor:pointer;color:var(--primary-color);transition:all .1s}.btn-small:hover{background:var(--primary-color);color:#fff}.btn-small:active{transform:translateY(2px)}.button-group{display:flex;gap:1rem;justify-content:center}.btn{padding:.8rem 2rem;font-size:1.2rem;border:3px solid var(--text-color);border-radius:50px;cursor:pointer;font-weight:700;transition:transform .1s,box-shadow .1s}.btn:active{transform:translateY(2px);box-shadow:none}.primary{background-color:var(--accent-color);color:#fff;box-shadow:4px 4px 0 var(--text-color)}.secondary{background-color:var(--secondary-color);color:#fff;box-shadow:4px 4px 0 var(--text-color)}footer{margin-top:2rem;font-size:.8rem;opacity:.7}.auto-time-control{display:flex;align-items:center;justify-content:center;gap:.5rem;margin-bottom:1rem;font-family:var(--font-display);color:var(--secondary-color);font-size:1.1rem}.auto-time-control input[type=checkbox]{width:20px;height:20px;cursor:pointer;accent-color:var(--accent-color)}@media (max-width: 480px){.timer-display{font-size:3.5rem}}