body {
    font-family: Arial, sans-serif;
    background-color: #f0f2f5;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
}

.chat-container {
    width: 90%;
    max-width: 600px;
    height: 80vh;
    background-color: #fff;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    display: flex;
    flex-direction: column;
}

.chat-header {
    background-color: #4a90e2;
    color: white;
    padding: 15px;
    border-top-left-radius: 8px;
    border-top-right-radius: 8px;
    text-align: center;
}

.chat-header h2 {
    margin: 0;
    font-size: 1.2em;
}

.chat-header p {
    font-size: 0.8em;
    margin: 5px 0 0;
    opacity: 0.9;
}

.chat-box {
    flex-grow: 1;
    padding: 20px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.message {
    padding: 10px 15px;
    border-radius: 18px;
    max-width: 75%;
    line-height: 1.4;
}

.user-message {
    background-color: #4a90e2;
    color: white;
    align-self: flex-end;
    border-bottom-right-radius: 4px;
}

.bot-message {
    background-color: #e9e9eb;
    color: #333;
    align-self: flex-start;
    border-bottom-left-radius: 4px;
}

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

#user-input {
    flex-grow: 1;
    border: 1px solid #ccc;
    border-radius: 20px;
    padding: 10px 15px;
    font-size: 1em;
}

#send-btn {
    background-color: #4a90e2;
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: 20px;
    margin-left: 10px;
    cursor: pointer;
}

#send-btn:hover {
    background-color: #357abd;
}