.header {
    font-size: 30px;
    justify-content: center;
    display: flex;
    background: gray;
}

a:link {
    text-decoration: none;
}

a:visited {
    text-decoration: none;
}

a:hover {
    text-decoration: none;
}

a:active {
    text-decoration: none;
}

a {
    color: inherit;
}

.menu-and-content {
    display: flex;
}

    .category-menu {
        display: flex;
        background: black;
    }
        
        .category {
            width: 150px;
            padding: 15px;
            min-height: 300px;
        }

            .category .brand {
                display: flex;
                color: red;
                border: red 1px solid;
                border-radius: 10px;
                margin: 10px;
                padding: 6px;
            }

            .category .create-button-link {
                background-color: red;
                border-radius: 10px;
                margin: 10px;
                margin-top: 130px;
                padding: 6px;
                text-align: center;
            }