body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background: linear-gradient(135deg, #6ae8be, #1e1e1e);
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
}

/* Chat container */
.chat-container {
    width: 360px;
    background: white;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
    border-radius: 20px;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

/* Header */
.chat-container h1 {
    background: #007AFF;
    color: white;
    text-align: center;
    padding: 15px;
    margin: 0;
    font-size: 18px;
}

/* Chat box */
#chat-box {
    flex: 1;
    padding: 15px;
    overflow-y: auto;
    height: 400px;
    display: flex;
    flex-direction: column;
}

/* Message bubbles */
.message {
    max-width: 80%;
    padding: 10px 15px;
    border-radius: 20px;
    margin-bottom: 10px;
    font-size: 14px;
    word-wrap: break-word;
}

/* User message (blue) */
.user-message {
    background: #007AFF;
    color: white;
    align-self: flex-end;
    border-bottom-right-radius: 5px;
}

/* Bot message (gray) */
.bot-message {
    background: #E5E5EA;
    color: black;
    align-self: flex-start;
    border-bottom-left-radius: 5px;
}

/* Input area */
.input-container {
    display: flex;
    border-top: 1px solid #ddd;
    padding: 10px;
    background: white;
}

/* Input field */
#user-input {
    flex: 1;
    padding: 10px;
    border: 1px solid #ccc;
    border-radius: 18px;
    outline: none;
    font-size: 14px;
}

/* Send button */
#send-button {
    background: #007AFF;
    color: white;
    border: none;
    padding: 10px 15px;
    margin-left: 10px;
    border-radius: 18px;
    cursor: pointer;
    font-weight: bold;
}

#send-button:hover {
    background: #005ecb;
}