body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
}
header {
    background-color: #333;
    color: #fff;
    padding: 10px;
    text-align: center;
}
header a {
    color: #fff;
    text-decoration: none;
    font-weight: bold;
    font-style: italic;
}
.container {
    display: flex;
    justify-content: center;
    align-items: flex-start;
    margin-top: 20px;
}
.product-image {
    width: 70%;
    text-align: center;
    position: relative;
}
.product-image img {
    max-width: 100%;
    height: auto;
}
.product-name {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background-color: rgba(0, 0, 0, 0.7);
    color: #fff;
    padding: 10px;
}
.size-selection {
    width: 30%;
    margin-left: 20px;
}
.size-selection h2 {
    text-align: center;
}
.size-options {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
}
.size-option {
    width: 100px;
    height: 100px;
    border: 1px solid #ccc;
    margin: 10px;
    display: flex;
    justify-content: center;
    align-items: center;
    cursor: pointer;
}
footer {
    text-align: center;
    margin-top: 20px;
}

body {
    margin: 0;
    padding: 0;
    font-family: Arial, sans-serif;
}

header {
    background-color: #333;
    color: #fff;
    padding: 10px;
    text-align: center;
}

header a {
    color: #fff;
    text-decoration: none;
}

.container {
    display: flex;
    flex-wrap: wrap;
    margin: 20px;
}

.product-details {
    flex: 1;
    margin-right: 20px;
}

.product-image img {
    width: 70%;
    height: 70%;
}

.product-info h2 {
    font-size: 24px;
    margin-top: 0;
}

.purchase-form {
    flex: 1;
}

.purchase-form h1 {
    font-size: 24px;
    margin-top: 0;
}

.purchase-form h2 {
    font-size: 18px;
    margin-top: 0;
}

.purchase-form label {
    display: block;
    margin-bottom: 5px;
}

.purchase-form input[type="text"] {
    width: 100%;
    padding: 5px;
    margin-bottom: 10px;
}

.purchase-form fieldset {
    margin-bottom: 10px;
}

.purchase-form button {
    padding: 10px;
    background-color: #333;
    color: #fff;
    border: none;
    cursor: pointer;
}

.purchase-form button a {
    color: #fff;
    text-decoration: none;
}

footer {
    background-color: #333;
    color: #fff;
    padding: 10px;
    text-align: center;
}

/* CSS Document */