body {
    font-family: sans-serif;
    background: #f2f2f2;
    margin: 0;
    padding: 0;
    direction: rtl;
}
header, footer {
    background: #007bff;
    color: white;
    padding: 1rem;
    text-align: center;
}
main {
    padding: 2rem;
}
.chat-box {
    background: white;
    border: 1px solid #ccc;
    height: 300px;
    overflow-y: scroll;
    margin-bottom: 1rem;
    padding: 1rem;
}
form {
    display: flex;
    gap: 1rem;
}
input {
    flex: 1;
    padding: 0.5rem;
}
button {
    padding: 0.5rem 1rem;
    background: #28a745;
    color: white;
    border: none;
    cursor: pointer;
}