body {
    margin: 0;
    padding: 0;
    font-family: Arial, sans-serif;
}

.chat-container {
    max-width: 600px;
    margin: 0 auto;
    border: 1px solid #ccc;
    border-radius: 10px;
    padding: 10px;
}

.chat-header {
    text-align: center;
}

.message-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.message-item {
    margin-bottom: 10px;
}

.message-item:last-child {
    margin-bottom: 0;
}

.message-item.sent .message-content {
    background-color: #4CAF50;
    color: #fff;
    margin-left: auto;
}

.message-item.received .message-content {
    background-color: #f2f2f2;
    color: #333;
    margin-right: auto;
}

.message-content {
    padding: 10px;
    border-radius: 10px;
    display: inline-block;
    max-width: 70%;
    word-wrap: break-word;
}

.chat-input {
    margin-top: 10px;
}

#message-input {
    width: 70%;
    padding: 10px;
    border-radius: 10px;
    border: 1px solid #ccc;
    outline: none;
}

#send-btn {
    padding: 10px 20px;
    background-color: #4CAF50;
    border: none;
    color: #fff;
    border-radius: 10px;
    cursor: pointer;
    outline: none;
}

.hidden {
    display: none;
}

.intro-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.intro-container img {
    width: 200px;
    height: 200px;
    border-radius: 50%;
    margin-bottom: 10px;
}