* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    background: #f0f2f5;
}   

.container {
    max-width: 1200px;
    margin: 20px auto;
    padding: 20px;
}

.chat-container {
    background: white;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    height: 70vh;
    display: flex;
    flex-direction: column;
}

.chat-header {
    padding: 20px;
    background: #1a73e8;
    color: white;
    border-radius: 10px 10px 0 0;
}

.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 20px;
}

.message {
    margin: 10px 0;
    padding: 10px 15px;
    border-radius: 15px;
    max-width: 80%;
    line-height: 1.4;
}

.user-message {
    background: #e3f2fd;
    margin-left: auto;
    border-bottom-right-radius: 5px;
}

.ai-message {
    background: #f5f5f5;
    margin-right: auto;
    border-bottom-left-radius: 5px;
}

.input-container {
    padding: 20px;
    background: white;
    border-top: 1px solid #eee;
    border-radius: 0 0 10px 10px;
    display: flex;
    gap: 10px;
}

textarea {
    flex: 1;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 5px;
    resize: none;
    height: 50px;
    font-size: 16px;
}

button {
    padding: 10px 20px;
    background: #1a73e8;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    transition: background 0.3s;
}

button:hover {
    background: #1557b0;
}

button:disabled {
    background: #ccc;
    cursor: not-allowed;
}

.typing-indicator {
    padding: 10px;
    color: #666;
    font-style: italic;
    display: none;
}

.error {
    color: #d32f2f;
    padding: 10px;
    text-align: center;
    display: none;
}