.fun-calculator {
    max-width: 400px;
    margin: 0 auto;
    padding: 20px;
    background-color: #f0e6f6;
    border-radius: 8px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    text-align: center;
    font-family: 'Comic Sans MS', cursive, sans-serif;
}

h2 {
    font-size: 1.8rem;
    margin-bottom: 20px;
    color: #9b59b6;
}

.display {
    font-size: 2.5rem;
    margin-bottom: 20px;
    background-color: #fff;
    padding: 15px;
    border: 2px solid #9b59b6;
    border-radius: 8px;
    min-height: 50px;
}

.buttons {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 10px;
}

.button {
    font-size: 1.5rem;
    padding: 20px;
    background-color: #f39c12;
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

.button:hover {
    background-color: #e67e22;
}

.easter-egg {
    margin-top: 20px;
    font-size: 1.2rem;
    color: #e74c3c;
    display: none;
    animation: bounce 1s infinite;
}

@keyframes bounce {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-10px);
    }
}