body {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
    font-family: Arial, sans-serif;
    background-color: #f0f0f0;
}

.button {
    display: inline-flex;
    justify-content: center;
    align-items: center;
    width: 100%;
    max-width: 200px;
    height: 100%;
    max-height: 200px;
    margin: 10px;
    padding: 20px;
    font-size: 2rem;
    cursor: pointer;
    border-radius: 8px;
    transition: background-color 0.3s ease, transform 0.3s ease;
}

.button:hover {
    transform: scale(1.1);
}

#red {
    background-color: #ff4d4d;
}

#blue {
    background-color: #4d79ff;
}

#yellow {
    background-color: #ffff4d;
}

#green {
    background-color: #4dff4d;
}

@media (max-width: 768px) {
    .button {
        max-width: 300px;
        max-height: 300px;
        font-size: 1.5rem;
    }
}

@media (max-width: 480px) {
    .button {
        max-width: 200px;
        max-height: 200px;
        font-size: 1rem;
    }
}