body {
    font-family: 'Roboto Mono', monospace;
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    background-color: #0d1117;
    color: #fff;
}

header {
    background-color: #0d1117;
    color: #fff;
    padding: 20px;
    text-align: center;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    border-bottom: 2px solid #4cb9ff;
}

h1 {
    margin: 0;
    font-size: 3em;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
}

.container {
    text-align: center;
    margin-top: 50px;
    position: relative;
}

.login-container, .chat-container {
    display: none;
}

.login-container.active, .chat-container.active {
    display: block;
}

input[type="text"], input[type="password"], input[type="file"] {
    padding: 10px;
    margin: 10px;
    border: 2px solid #4cb9ff;
    border-radius: 5px;
    background-color: #161b22;
    color: #fff;
    font-family: 'Roboto Mono', monospace;
}

button {
    padding: 15px 30px;
    background-color: #4cb9ff;
    color: #fff;
    font-size: 24px;
    text-decoration: none;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    transition: background-color 0.3s ease;
    font-family: 'Roboto Mono', monospace;
    border: 2px solid #4cb9ff;
    outline: none;
}

button:hover {
    background-color: #1a8cff;
}

footer {
    background-color: #0d1117;
    color: #fff;
    padding: 20px;
    text-align: center;
    position: fixed;
    bottom: 0;
    width: 100%;
    border-top: 2px solid #4cb9ff;
}

footer p {
    margin: 0;
}

#userList {
    background-color: #161b22;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.2);
    max-width: 600px;
    margin: 20px auto;
    border: 2px solid #4cb9ff;
    color: #ccc;
    overflow-y: auto;
    max-height: 200px;
}

#messages {
    background-color: #161b22;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.2);
    max-width: 600px;
    margin: 20px auto;
    border: 2px solid #4cb9ff;
    color: #ccc;
    list-style-type: none;
    padding-left: 0;
    overflow-y: auto;
    max-height: 400px;
}

#messages li {
    margin-bottom: 10px;
}

#messageInput {
    width: calc(100% - 40px);
    margin-bottom: 10px;
}

#imageUpload {
    margin-bottom: 10px;
}