body{display:flex;flex-direction:column;align-items:center;background-color:#000}.stopwatch{margin-top:50px;display:flex;flex-direction:column;align-items:center;border:5px solid white;border-radius:50px;background-color:#000;padding:30px}h1{color:#fff;font-size:5rem;font-family:monospace;font-weight:700}.display{font-size:5rem;font-family:monospace;font-weight:700;color:#fff;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:green}.start-button:hover{background-color:#006400}.stop-button{background-color:red}.stop-button:hover{background-color:#8b0000}.reset-button{background-color:#00f}.reset-button:hover{background-color:#00008b}