:root {
    --primary-color: #0056b3;
    --secondary-color: #f8f9fa;
    --text-color: #333;
}

body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: var(--secondary-color);
}

#chatbot-container {
    max-width: 500px;
    margin: 0 auto;
    height: 100vh;
    display: flex;
    flex-direction: column;
    background-color: white;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
}

header {
    background-color: var(--primary-color);
    color: white;
    padding: 15px;
    text-align: center;
    display: flex;
    align-items: center;
    justify-content: center;
}

.logo {
    width: 50px;
    margin-right: 10px;
    border-radius: 50%;
}

#chat-messages {
    flex-grow: 1;
    overflow-y: auto;
    padding: 15px;
    display: flex;
    flex-direction: column;
}

.message {
    margin-bottom: 15px;
    padding: 10px;
    border-radius: 10px;
    max-width: 80%;
    word-wrap: break-word;
}

.user-message {
    background-color: var(--primary-color);
    color: white;
    align-self: flex-end;
    margin-left: auto;
}

.bot-message {
    background-color: #e9ecef;
    color: var(--text-color);
    align-self: flex-start;
}

.input-area {
    display: flex;
    padding: 15px;
    background-color: white;
    border-top: 1px solid #e0e0e0;
}

#user-input {
    flex-grow: 1;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 5px;
    margin-right: 10px;
}

#send-btn {
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: 10px 15px;
    border-radius: 5px;
    cursor: pointer;
}

.loading {
    text-align: center;
    padding: 10px;
    color: var(--primary-color);
    align-self: center;
}

@media (max-width: 600px) {
    #chatbot-container {
        width: 100%;
        height: 100vh;
    }
}