.stopwatch{display:flex;flex-direction:column;align-items:center;justify-content:center;height:100vh;background-color:#f0f0f0}.stopwatch-display{display:flex;justify-content:space-between;width:300px;font-size:48px;font-weight:700;margin-bottom:20px}.stopwatch-display span{background-color:#333;color:#fff;padding:10px 20px;border-radius:10px;box-shadow:0 0 10px #0003}.buttons{display:flex;justify-content:space-between;width:300px}button{padding:10px 20px;font-size:18px;border:none;border-radius:10px;background-color:#4caf50;color:#fff;cursor:pointer}button:hover{background-color:#3e8e41}.btn1{background-color:#ff9800}.btn1:hover{background-color:#e68a00}button:nth-child(3){background-color:#f44336}button:nth-child(3):hover{background-color:#e91e63}