* {
    box-sizing: border-box;
}

.header {
    display: flex;
    background-color: #E6E6FA;
}

.logo img {
    width: 10%;
    height: auto;
}

.menu-bar ul {
    list-style: none;
    display: flex;
    gap: 10px;
    align-items: center;
}
.menu-bar {
    padding: 10px 10px;
}

.menu-bar ul a {
    text-decoration: none;
}

.menu-bar ul a:hover {
    color: cyan;
}

.main-content {
    height: 400px;
}

.main-content::after {
    content: "";
    display: table;
    clear: both;
}

.navigation-bar {
    padding: 0 10px;
    width: 25%;
    float: left;
}

.navigation-bar ul {
    list-style: none;
}

.navigation-bar ul li {
    margin: 10px 5px;
}

.navigation-bar input {
    border: 1px solid darkgrey;
    width: 90%;
    height: 30px;
    margin: 5px;
    border-radius: 5px;
}

.content-L{
    font-size: 10px;
}
.content-M {
    width: 30%;
    float: left;
    display: flex;
    gap: 10px;
}

.content-M .product-item {
    width: 30%;
    border: 1px solid darkgrey;
    border-radius: 5px;
    padding: 5px;
}

.content-M .product-item img {
    width: 100%;
    border: 1px solid gainsboro;
    border-radius: 5px;
}

.product-item .product-title {
    font-size: 18px;
    font-weight: bold;
    color: darkred;
    margin: 3px;
}

.product-item .product-price {
    color: darkorange;
    margin: 3px;
}

.product-item .product-description {
    margin: 3px;
}

.footer {
    height: 150px;
    background-color: cyan;
}