style.css

body {
    background-color: #333;
    font-family: Arial, sans-serif;
    text-align: center;
}

.container {
    max-width: 400px;
    margin: 40px auto;
    padding: 20px;
    background-color: #444;
    border-radius: 10px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.5);
}

h1 {
    color: #fff;
    margin-top: 0;
}

.timer {
    font-size: 24px;
    font-weight: bold;
    color: #fff;
    margin-bottom: 10px;
}

.start-button {
    background-color: #007bff;
    color: #fff;
    border: none;
    padding: 10px 20px;
    font-size: 18px;
    cursor: pointer;
    border-radius: 5px;
}

.start-button:hover {
    background-color: #0069d9;
}

.start-button.active {
    background-color: #fff;
    color: #333;
}

.clicks-per-second {
    font-size: 18px;
    color: #fff;
    margin-bottom: 10px;
}

.total-clicks {
    font-size: 18px;
    color: #fff;
    margin-bottom: 10px;
}