body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
}

.chat-container {
    width: 400px;
    height: 600px;
    background: white;
    border-radius: 10px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.3);
    display: flex;
    flex-direction: column;
}

.chat-header {
    background: #4a5568;
    color: white;
    padding: 1rem;
    border-radius: 10px 10px 0 0;
    text-align: center;
}

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

.message {
    margin-bottom: 1rem;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    max-width: 80%;
}

.user-message {
    background: #4299e1;
    color: white;
    margin-left: auto;
}

.bot-message {
    background: #e2e8f0;
    color: #2d3748;
}

.chat-input {
    padding: 1rem;
    border-top: 1px solid #e2e8f0;
    display: flex;
    gap: 0.5rem;
}

.chat-input input {
    flex: 1;
    padding: 0.5rem;
    border: 1px solid #cbd5e0;
    border-radius: 20px;
    outline: none;
}

.chat-input button {
    background: #4299e1;
    color: white;
    border: none;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    cursor: pointer;
}

.chat-input button:hover {
    background: #3182ce;
}