static/style.css

body {
    font-family: Arial, sans-serif;
    background-color: #f4f4f4;
    margin: 0;
    padding: 0;
}

.container {
    max-width: 600px;
    margin: 50px auto;
    background-color: #fff;
    padding: 20px;
    border-radius: 5px;
}

.chat-box {
    border: 1px solid #e0e0e0;
    padding: 20px;
    height: 300px;
    overflow-y: scroll;
    margin-bottom: 10px;
}

button {
    background-color: #007BFF;
    color: #fff;
    border: none;
    padding: 10px 15px;
    border-radius: 5px;
    cursor: pointer;
}

.user-message, .bot-message {
    margin: 10px 0;
    padding: 10px;
    border-radius: 5px;
}

.user-message {
    background-color: #e0e0e0;
    align-self: flex-end;
}

.bot-message {
    background-color: #007BFF;
    color: white;
    align-self: flex-start;
}

input[type="text"] {
    width: 100%;
    padding: 10px;
    margin: 10px 0;
    border: 1px solid #ccc;
    border-radius: 4px;
    box-sizing: border-box;
    transition: 0.3s;
}

input[type="text"]:focus {
    border-color: #007BFF;
    box-shadow: 0 0 5px rgba(0,123,255,0.5);
}

/* Placeholder style */
input[type="text"]::placeholder {
    color: #aaa;
}

/* If you'd like to style the API Key label as well */
label {
    display: block;
    margin-bottom: 8px;
    font-weight: bold;
}