body{display:flex;flex-direction:column;align-items:center;background-color:#f2f2f2}.stopwatch{display:flex;flex-direction:column;align-items:center;border:5px solid black;border-radius:50px;background-color:#fff;padding:30px}.display{font-size:5rem;font-family:Arial,Helvetica,sans-serif;font-weight:700;color:#4d4d4d;margin-bottom:25px}.controls button{font-size:1.5rem;font-weight:700;padding:10px 20px;margin:5px;min-width:125px;border:none;border-radius:10px;cursor:pointer;color:#fff;transition:background-color .5s ease}.start-button{background-color:#1c0}.start-button:hover{background-color:#0d9900}.stop-button{background-color:#f2330d}.stop-button:hover{background-color:#c2290a}.reset-button{background-color:#3da8f5}.reset-button:hover{background-color:#0a75c2}