body {
    font-family: Arial, sans-serif;
    background-color: #f4f4f4;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
}

h1 {
    color: #333;
   /*  margin: 20px 0; */
}

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

ul li {
    margin: 10px 0;
}

ul li a {
    text-decoration: none;
    color: #007BFF;
    font-weight: bold;
}

ul li a:hover {
    color: #0056b3;
}

#chat-container {
    width: 100%;
    max-width: 600px;
    background-color: #fff;
    border: 1px solid #ddd;
    border-radius: 5px;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
    padding: 20px;
    margin: 20px 0;
}

#chat-container h2 {
    margin-top: 0;
}

#receiver-username {
    color: #007BFF;
}

#chat-log {
    height: 300px;
    overflow-y: auto;
    border: 1px solid #ddd;
    padding: 10px;
    background-color: #f9f9f9;
    border-radius: 5px;
    margin-bottom: 20px;
}

#chat-log .message {
    margin-bottom: 10px;
}

#chat-log .message strong {
    color: #007BFF;
}

#chat-message-input {
    width: calc(100% - 70px);
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 5px;
    margin-right: 10px;
}

#chat-message-submit {
    padding: 10px 20px;
    border: none;
    background-color: #007BFF;
    color: #fff;
    border-radius: 5px;
    cursor: pointer;
}

#chat-message-submit:hover {
    background-color: #0056b3;
}