* {
    list-style-type: none;
    margin: 0;
}

header {
    display: flex;
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
    border: 2px solid rgba(0,128,0,0.8);
    margin: 0;
    padding: 20px;
    box-shadow: 7px 7px 5px rgba(0, 0, 0, 0.5), -10px -10px 5px rgba(255, 0, 0, 0.5);
}

a {
    color: #000000;
    cursor: pointer;
}

.promo {
    margin-top: 25px;
    border: 1px solid #000000;
    height: 200px;
    margin-left: 20px;
    margin-right: 20px;
}

.categories, #products {
    display: flex;
    margin: 20px;
    justify-content: space-around;
    flex-wrap: wrap;
}

.container {
    border: 1px solid #ddd;
    padding: 20px;
    margin: 10px 0;
    width: 25%;
}

.container h2 {
    font-size: 1.5em;
    margin-bottom: 10px;
}

.container a {
    display: block;
    margin: 5px 0;
    color: #007bff;
    text-decoration: none;
}

.container a:hover {
    text-decoration: underline;
}

#products a {
    color: #000000;
    font-size: 1.5em;
    cursor: pointer;
}