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

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

.chat-container {
    width: 90%;
    max-width: 600px;
    background: rgba(255, 255, 255, 0.95);
    border-radius: 20px;
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
    overflow: hidden;
}

.chat-header {
    background: #764ba2;
    color: white;
    padding: 20px;
    text-align: center;
}

.chat-messages {
    height: 400px;
    overflow-y: auto;
    padding: 20px;
}

.message {
    margin: 10px;
    padding: 15px;
    border-radius: 15px;
    max-width: 80%;
    word-wrap: break-word;
}

.bot {
    background: #f0f0f0;
    margin-right: auto;
    border-bottom-left-radius: 5px;
}

.user {
    background: #764ba2;
    color: white;
    margin-left: auto;
    border-bottom-right-radius: 5px;
}

.chat-input {
    display: flex;
    padding: 20px;
    border-top: 1px solid #eee;
}

input {
    flex: 1;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 20px;
    margin-right: 10px;
    font-size: 16px;
}

button {
    padding: 10px 20px;
    background: #764ba2;
    color: white;
    border: none;
    border-radius: 20px;
    cursor: pointer;
    transition: background 0.3s;
}

button:hover {
    background: #667eea;
}