header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background-color: #2B2B2B;
    color: #f5f5f5;
    width: 600px;
    height: 3rem;
    border-radius: 50px;
    padding: 0 0.45rem 0 0.8rem;
}   

header img {
    width: 50px;
    height: 50px;
    margin-left: 10px;
}

.logo a svg {
    display: none;
}

header ul {
    display: flex;
    list-style: none;
    gap: 1.5rem;
}   

header ul li {
    cursor: pointer;
    font-size: 1rem;
    font-weight: 400;
    font-family: 'Helvetica Neue', Roboto;
}   
header ul li a {
    text-decoration: none;
    color: inherit;
}

header .buttton {
    background-color: #f5f5f5;
    color: #2B2B2B;
    border: none;
    border-radius: 50px;
    padding: 0.6rem 1rem;
    font-size: 1rem;
    font-weight: 400;
    cursor: pointer;
    font-family: 'Helvetica Neue', Roboto;
}

header .buttton a {
    text-decoration: none;
    color: inherit;
}

@media screen and (max-width: 680px) {
    .header nav ul {
        display: none;
    }
    .logo {
        display: flex;
    }
    .logo a svg {
        display: inline-block;
    }
    .header img  {
        display: none;
    }
    .logo {
        padding: 5px 0 0 8px;
    }
}