body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    line-height: 1.6;
    color: #333;
}

.sach {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
}

header {
    background: #183d67;
    color: #fff;
    padding: 1rem 0;
}

header h1 {
    text-align: center;
    margin: 0;
}

header nav ul {
    list-style: none;
    text-align: center;
    padding: 0;
}

header nav ul li {
    display: inline;
    margin: 0 15px;
}

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


.banner {
    background: #3498db;
    color: #fff;
    text-align: center;
    padding: 2rem 0;
    
}

.banner h2 {
    margin: 0;
}

.banner p {
    font-size: 1.2rem;
}


.books {
    background: #f4f4f4;
    padding: 2rem 0;
    text-align: center;
}

.books h2 {
    margin-bottom: 1.5rem;
}

.book-list {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
}

.book {
    background: #fff;
    border: 1px solid #ddd;
    border-radius: 8px;
    padding: 1rem;
    text-align: center;
    width: 250px;
}

.book img {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
}

.book h3 {
    margin: 1rem 0 0.5rem;
}

.book p {
    margin: 0;
}


.about {
    background: #ecf0f1;
    padding: 2rem 0;
    text-align: center;
}


.contact {
    background: #183d67 ;
    padding: 2rem 0;
    text-align: center;
}


footer {
    background: #2c3e50;
    color: #fff;
    text-align: center;
    padding: 1rem 0;
    margin-top: 2rem;
}
#anh
{
    width: 100%;
}
.TT{
    color: white;
}