body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 20px;
    background-color: #f5f5f5;
}

.container {
    max-width: 600px;
    margin: 0 auto;
    background-color: white;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

#marker {
    color: #333;
    text-align: center;
    margin-bottom: 20px;
}

.counter-section {
    text-align: center;
}

#counter {
    font-weight: bold;
    font-size: 1.2em;
    color: #007bff;
}

#incrementBtn {
    margin-top: 10px;
    padding: 8px 16px;
    background-color: #007bff;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
}

#incrementBtn:hover {
    background-color: #0056b3;
}