/* styles.css */
body {
    font-family: Arial, sans-serif;
    background-color: #f4f4f9;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
    padding: 10px;
}

.chat-container {
    width: 100%;
    max-width: 500px;
    background-color: #fff;
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    height: 90vh;
}

#chat-box {
    flex: 1;
    padding: 20px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.message {
    max-width: 70%;
    padding: 12px 16px;
    border-radius: 12px;
    font-size: 14px;
    line-height: 1.5;
    word-wrap: break-word;
}

.message.user {
    background-color: #007bff;
    color: #fff;
    align-self: flex-end;
    border-bottom-right-radius: 4px;
}

.message.ai {
    background-color: #e9ecef;
    color: #333;
    align-self: flex-start;
    border-bottom-left-radius: 4px;
}

.message.system {
    background-color: #fff3cd;
    color: #856404;
    align-self: center;
    border-radius: 8px;
    text-align: center;
    font-size: 12px;
    padding: 10px;
    border: 1px solid #ffeeba;
}

.input-container {
    display: flex;
    padding: 10px;
    background-color: #f8f9fa;
    border-top: 1px solid #ddd;
}

#user-input {
    flex: 1;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 8px;
    margin-right: 10px;
    font-size: 14px;
    outline: none;
}

#send-btn {
    padding: 10px 20px;
    background-color: #007bff;
    color: #fff;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 14px;
    transition: background-color 0.3s ease;
}

#send-btn:hover {
    background-color: #0056b3;
}

/* 移动端优化 */
@media (max-width: 600px) {
    .chat-container {
        height: 100vh;
        border-radius: 0;
    }

    #chat-box {
        padding: 15px;
    }

    .message {
        max-width: 80%;
        font-size: 13px;
    }

    #user-input {
        font-size: 13px;
    }

    #send-btn {
        padding: 10px 15px;
        font-size: 13px;
    }
}