body {
    font-family: Arial, sans-serif;
    text-align: center;
    margin: 20px;
    background-color: #f4f4f4;
}

h1 {
    color: #333;
}

#send-message, #messages {
    background: white;
    padding: 15px;
    margin: 15px auto;
    width: 95%;
    max-width: 450px;
    border-radius: 8px;
    box-shadow: 0px 0px 10px rgba(0, 0, 0, 0.1);
}

input, textarea {
    width: 90%;
    padding: 15px;
    margin: 5px auto;
}

button {
    background: #28a745;
    color: white;
    padding: 10px;
    border: none;
    cursor: pointer;
    width: 100%;
}

button:hover {
    background: #218838;
}

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

li {
    background: #fff;
    margin: 5px;
    padding: 10px;
    border-radius: 5px;
    box-shadow: 0px 0px 5px rgba(0, 0, 0, 0.1);
}