body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: #f4f4f9;
    margin: 0;
    padding: 2rem;
    display: flex;
    flex-direction: column;
    align-items: center;
}

h1 {
    color: #333;
    margin-bottom: 1rem;
}

#username {
    padding: 0.4rem;
    width: 150px;
    font-size: 1rem;
    border: 1px solid #ccc;
    border-radius: 4px;
    margin: 0.3rem;
}

#msg {
    padding: 0.6rem;
    width: 400px;
    font-size: 1rem;
    border: 1px solid #ccc;
    border-radius: 4px;
    margin: 0.3rem;
}

button {
    padding: 0.5rem 1rem;
    background-color: #4caf50;
    color: white;
    border: none;
    border-radius: 4px;
    font-size: 1rem;
    cursor: pointer;
    margin-left: 0.5rem;
}

button:hover {
    background-color: #45a049;
}

ul#messages {
    list-style: none;
    padding: 0;
    margin-top: 1rem;
    width: 100%;
    max-width: 600px;
    height: 300px;
    overflow-y: auto;
    border: 1px solid #ddd;
    background: white;
    border-radius: 5px;
}

ul#messages li {
    padding: 0.5rem;
    border-bottom: 1px solid #eee;
}

ul#messages li:last-child {
    border-bottom: none;
}

body {
    font-family: Arial, sans-serif;
    margin: 20px;
    background-color: #f8f8f8;
    color: #333;
}

h1, h2 {
    color: #444;
}

button {
    background-color: #007bff;
    color: white;
    border: none;
    padding: 10px 20px;
    cursor: pointer;
    font-size: 1rem;
    border-radius: 5px;
}

button:hover {
    background-color: #0056b3;
}

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

ul li a {
    text-decoration: none;
    color: #007bff;
}

ul li a:hover {
    text-decoration: underline;
}