html, body {
    height: 100%;
    margin: 0;
}

.center-container {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
}

#banana {
    max-height: 90%;
}

@media (max-width: 600px) {
    #banana {
        max-width: 90%;
	max-height: 90%;
    }
}