body {
    font-family: Arial, sans-serif;
    direction: rtl;
    text-align: center;
    background-color: #f4f4f4;
}

header {
    background-color: #4CAF50;
    color: white;
    padding: 20px;
}

main {
    padding: 20px;
}

ul {
    list-style-type: none;
    padding: 0;
}

li {
    background: white;
    margin: 5px;
    padding: 10px;
    border-radius: 5px;
}