/*body section style*/
body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f4f4f4;
    color: #333;
}

/*header-parent and child styles*/
header {
    background-color: #555353;
    color: #fff;
    padding: 10px 0;
}
header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}
header h1 {
    margin: 0;
    font-size: 60px;
}
header nav ul {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
}
header nav ul li {
    margin-left: 20px;
}
header nav ul li a {
    color: #fff;
    text-decoration: none;
    font-weight: bold;
}

/*id-parent 'hero' and child styles*/
#hero {
    background-image: url('images/banner.jpg');
    background-size: cover;
    background-position: center;
    color: #ffffff;
    padding: 100px 0;
    text-align: center;
}
#hero h2 {
    font-size: 48px;
    margin: 0;
}
#hero p {
    font-size: 24px;
    margin: 20px 0;
}
#hero .btn {
    background-color: #ff6347;
    color: #fff;
    padding: 10px 20px;
    text-decoration: none;
    border-radius: 5px;
    font-size: 18px;
}

/*id-parents 'features','models','reviews','contact' and their children styles*/
#features, #models, #reviews, #contact {
    padding: 60px 20px;
    background-color: #fff;
}
#features .container, #models .container, #reviews .container, #contact .container {
    max-width: 1200px;
    margin: 0 auto;
}
#features h2, #models h2, #reviews h2, #contact h2 {
    text-align: center;
    margin-bottom: 40px;
    font-size: 36px;
}
.feature-list, .model-list, .review-list {
    display: flex;
    justify-content: space-around;
    flex-wrap: wrap;
}
.feature-item, .model-item, .review-item {
    max-width: 30%;
    text-align: center;
    margin-bottom: 20px;
}
.feature-item img, .model-item img, .review-item img {
    max-width: 100%;
    border-radius: 5px;
}
.feature-item h3, .model-item h3 {
    font-size: 24px;
    margin: 20px 0 10px;
}
.feature-item p, .model-item p {
    font-size: 16px;
}
.model-item .btn {
    background-color: #ff6347;
    color: #fff;
    padding: 10px 20px;
    text-decoration: none;
    border-radius: 5px;
    font-size: 18px;
}
.review-item p {
    font-size: 16px;
    margin: 10px 0;
}
.review-item strong {
    display: block;
    margin-top: 10px;
}

/*id-parent 'contact' and child styles*/
#contact form {
    max-width: 600px;
    margin: 0 auto;
}
#contact .form-group {
    margin-bottom: 20px;
}
#contact .form-group label {
    display: block;
    margin-bottom: 5px;
}
#contact .form-group input, #contact .form-group textarea {
    width: 100%;
    padding: 10px;
    box-sizing: border-box;
}
#contact .btn {
    background-color: #ff6347;
    color: #fff;
    padding: 10px 20px;
    text-decoration: none;
    border-radius: 5px;
    font-size: 18px;
    display: block;
    margin: 0 auto;
    text-align: center;
}

/*footer-parent section and child style*/
footer {
    background-color: #222;
    color: #fff;
    padding: 10px 0;
    text-align: center;
}
footer .container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}