body {
    font-family: Arial, sans-serif;
    direction: rtl;
    text-align: right;
    background-color: #f5f5f5;
    margin: 0;
    padding: 0;
}
header {
    background: #007BFF;
    color: white;
    text-align: center;
    padding: 1em;
}
nav ul {
    list-style: none;
    padding: 0;
    text-align: center;
}
nav ul li {
    display: inline;
    margin: 0 15px;
}
nav ul li a {
    text-decoration: none;
    color: #007BFF;
    font-weight: bold;
}
section {
    padding: 20px;
    background: white;
    margin: 20px;
    border-radius: 8px;
    box-shadow: 0px 0px 10px rgba(0,0,0,0.1);
}