.logo {
    height: 40px;
}

.main-nav {
    display: flex;
    gap: 20px;
}

.link {
    color: #0000ff;
    font-size: 20px;
    text-decoration: none;
}
.link:hover {
    background-color: #f00;
}
.link:focus {
    background-color: #0a0;
}

@media (max-width: 700px) {
    .main-nav {
        display: none;
    }
}