body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f5f5f5;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
    background-color: #fff;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
}

.product-image {
    margin-bottom: 30px;
}

.product-image img {
    max-width: 400px;
    height: auto;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.product-details {
    text-align: center;
    margin-bottom: 30px;
}

h1 {
    font-size: 36px;
    margin: 0 0 10px;
    color: #333;
    text-transform: uppercase;
    letter-spacing: 2px;
}

p {
    margin: 0 0 10px;
    color: #777;
    font-size: 18px;
    line-height: 1.4;
}

.cta-button {
    display: inline-block;
    background-color: #007bff;
    color: #fff;
    padding: 12px 30px;
    border-radius: 30px;
    text-decoration: none;
    font-size: 20px;
    transition: background-color 0.3s ease;
}

.cta-button:hover {
    background-color: #0056b3;
}

.features {
    display: flex;
    justify-content: space-between;
    margin-bottom: 30px;
}

.feature {
    flex-basis: 30%;
    text-align: center;
}

.feature-icon {
    font-size: 30px;
    margin-bottom: 10px;
    color: #007bff;
}

.feature-title {
    font-size: 18px;
    margin-bottom: 10px;
    color: #333;
}

.feature-description {
    color: #777;
    font-size: 14px;
    line-height: 1.4;
}

.reviews {
    margin-bottom: 30px;
}

.review {
    border-bottom: 1px solid #ddd;
    padding-bottom: 20px;
    margin-bottom: 20px;
}

.review-author {
    font-size: 16px;
    font-weight: bold;
    color: #333;
}

.review-text {
    color: #777;
    font-size: 14px;
    line-height: 1.4;
}

.size-inputs {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    margin-top: 10px;
}

.size-input {
    display: flex;
    align-items: center;
    margin: 5px;
}

.size-label {
    margin-left: 5px;
}

input[type="checkbox"] {
    display: none;
}

input[type="checkbox"]+label {
    cursor: pointer;
    border: 2px solid #ddd;
    border-radius: 4px;
    padding: 8px;
    transition: background-color 0.3s ease;
}

input[type="checkbox"]:checked+label {
    background-color: #007bff;
    color: #fff;
    border-color: #007bff;
}

input[type="checkbox"]:checked+label:hover {
    background-color: #0056b3;
}