body {
    font-family: 'Arial', sans-serif;
}

.pin-dots {
    margin-bottom: 20px;
}

.dot {
    width: 20px;
    height: 20px;
    border: 2px solid #007BFF;
    border-radius: 50%;
    background-color: transparent;
}

.dot.filled {
    background-color: #007BFF;
}

.btn-grid button {
    margin: 5px;
    width: 60px;
    height: 60px;
    font-size: 1.5rem;
}