body {
    font-family: Arial, sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
    background-color: #e5e5e5;
}

.chat-container {
    width: 100%;
    max-width: 800px;
    height: 90vh;
    background-color: white;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
    display: flex;
    flex-direction: column;
    border-radius: 8px;
    overflow: hidden;
}

.chat-header {
    background-color: #0088cc;
    color: white;
    padding: 15px;
    text-align: center;
    font-size: 20px;
}

.chat-messages {
    flex: 1;
    padding: 15px;
    overflow-y: auto;
    background-color: #f7f7f7;
}

.chat-message {
    display: flex;
    align-items: flex-start;
    margin-bottom: 15px;
}

.chat-message .avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    overflow: hidden;
    margin-right: 10px;
}

.chat-message .avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.chat-message .message-content {
    max-width: 70%;
    background-color: white;
    padding: 10px;
    border-radius: 8px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.chat-message .message-content .username {
    font-weight: bold;
    margin-bottom: 5px;
}

.chat-message .message-content .text {
    word-wrap: break-word;
}

.chat-footer {
    display: flex;
    padding: 15px;
    padding-left: 50px;
    border-top: 1px solid #ddd;
}

.chat-input {
    flex: 1;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 20px;
    margin-right: 10px;
    outline: none;
}

.chat-send-button {
    padding: 10px 20px;
    border: none;
    background-color: #0088cc;
    color: white;
    border-radius: 20px;
    cursor: pointer;
    outline: none;
}

.chat-send-button:hover {
    background-color: #007bb5;
}