.header-image {
    max-width: 137px;
    transition: all 0.3s ease-in 0s;
}

.header-image:hover {
    opacity: 0.5;
    transition: all 0.3s ease-in 0s;
}

@media (max-width: 480px) {
    .header-image {
        max-width: 115px;
    }
}