body {
    font-family: Arial, sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    margin: 0;
    background-color: #ebcdb7;
}

#chat-container {
    display: flex;
    flex-direction: column;
    width: 100%;
    max-width: 600px;
    height: 90vh;
    background-color: #c8ae9d;
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
    border-radius: 8px;
    overflow: hidden;
}

#header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px;
    background-color: #4CAF50;
    color: white;
}

#messages {
    flex-grow: 1;
    overflow-y: auto;
    padding: 10px;
}

.message {
    padding: 8px 12px;
    margin-bottom: 5px;
    border-radius: 15px;
    max-width: 80%;
    word-wrap: break-word;
    background-color: #e5e5ea;
    align-self: flex-start;
}

.mine {
    background-color: #007aff;
    color: white;
    margin-left: auto;
    text-align: right;
}

.message-sender {
    font-weight: bold;
    font-size: 0.8em;
    display: block;
    margin-bottom: 3px;
    color: #555;
}

.my-message .message-sender {
    color: #ddd;
}

#message-form {
    display: flex;
    padding: 10px;
    border-top: 1px solid #ccc;
}

#message-input {
    flex-grow: 1;
    padding: 10px;
    border: 1px solid #ccc;
    border-radius: 20px;
    margin-right: 10px;
}

#message-form button {
    padding: 10px 15px;
    border: none;
    background-color: #4CAF50;
    color: white;
    border-radius: 20px;
    cursor: pointer;
}

#auth-ui {
    padding: 20px;
    background: #bba494;
    border-radius: 8px;
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
}

#auth-ui input, #auth-ui button {
    display: block;
    width: 100%;
    padding: 10px;
    margin-bottom: 10px;
    border-radius: 4px;
    border: 1px solid #ccc;
}

#auth-ui button {
    background-color: #44a7f9;
    color: white;
    cursor: pointer;
    border: none;
}

#auth-ui button:hover {
    opacity: 0.9;
}

.error {
    color: red;
    font-size: 0.9em;
    margin-top: 10px;
}