“`html

body {
font-family: Arial, Helvetica, sans-serif;
}

h1 {
font-size: 24px;
font-weight: bold;
}

h2 {
font-size: 20px;
font-weight: bold;
}

h3 {
font-size: 18px;
font-weight: bold;
}

h4 {
font-size: 16px;
font-weight: bold;
}

ul {
list-style-type: none;
padding: 0;
}

li {
margin-bottom: 5px;
}

.container {
width: 1200px;
margin: 0 auto;
}

.product-image {
float: left;
margin-right: 20px;
}

.product-info {
width: 70%;
float: left;
}

.product-name {
font-size: 30px;
margin-bottom: 10px;
}

.product-price {
font-size: 24px;
color: red;
font-weight: bold;
margin-bottom: 10px;
}

.product-description {
font-size: 16px;
margin-bottom: 10px;
}

.product-features {
font-size: 16px;
margin-bottom: 10px;
}

.product-features ul {
padding-left: 15px;
}

.product-options {
font-size: 16px;
margin-bottom: 10px;
}

.product-options select {
width: 200px;
}

.product-quantity {
font-size: 16px;
margin-bottom: 10px;
}

.product-quantity input {
width: 50px;
}

.product-add-to-cart {
font-size: 16px;
background-color: #009900;
color: #fff;
padding: 5px 10px;
margin-bottom: 10px;
}

.product-add-to-cart:hover {
background-color: #007700;
}

.product-share {
font-size: 16px;
margin-bottom: 10px;
}

.product-share a {
margin-right: 5px;
}

.product-reviews {
font-size: 16px;
margin-bottom: 10px;
}

.product-reviews ul {
list-style-type: none;
padding: 0;
}

.product-reviews li {
margin-bottom: 5px;
}

.product-reviews .review-author {
font-weight: bold;
}

.product-reviews .review-date {
font-size: 12px;
}

.product-reviews .review-content {
font-size: 14px;
}

.product-related {
font-size: 16px;
margin-bottom: 10px;
}

.product-related ul {
list-style-type: none;
padding: 0;
}

.product-related li {
margin-bottom: 5px;
}

.product-related a {
margin-right: 5px;
}

.product-documentation {
font-size: 16px;
margin-bottom: 10px;
}

.product-documentation ul {
list-style-type: none;
padding: 0;
}

.product-documentation li {
margin-bottom: 5px;
}

.product-documentation a {
margin-right: 5px;
}