body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    margin: 0;
    background-color: #f0f0f0; 
}

.stopwatch-container {
    text-align: center;
    padding: 40px;
    border-radius: 12px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
    background-color: #ffffff;
}

h1 {
    color: #333;
    margin-bottom: 30px;
}

.time-display {
    font-size: 4em;
    font-weight: 300;
    margin-bottom: 30px;
    color: #4CAF50; /* Green text for a sporty look */
}

.controls button {
    padding: 10px 20px;
    margin: 0 10px;
    border: none;
    border-radius: 5px;
    font-size: 1em;
    cursor: pointer;
    transition: background-color 0.3s, transform 0.1s;
    min-width: 100px;
}

#startStopBtn {
    background-color: #4CAF50; /* Green for Start */
    color: white;
}

#startStopBtn.stop {
    background-color: #f44336; /* Red for Stop */
}

#resetBtn {
    background-color: #555555;
    color: white;
}

.controls button:hover {
    opacity: 0.9;
}

.controls button:active {
    transform: scale(0.98);
}