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

body {
    font-family: Arial, sans-serif;
    background: linear-gradient(135deg, #667eea, #764ba2);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
}

.chat-container {
    background: white;
    width: 100%;
    max-width: 450px;
    border-radius: 18px;
    padding: 25px;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.2);
}

h1 {
    text-align: center;
    color: #5b4baf;
    margin-bottom: 10px;
}

.subtitle {
    text-align: center;
    color: #666;
    margin-bottom: 20px;
}

.chat-box {
    height: 350px;
    overflow-y: auto;
    border: 1px solid #ddd;
    border-radius: 12px;
    padding: 15px;
    margin-bottom: 15px;
    background: #f9f9ff;
}

.bot-message,
.user-message {
    padding: 12px;
    margin-bottom: 12px;
    border-radius: 12px;
    max-width: 90%;
    overflow-wrap: anywhere;
    line-height: 1.5;
}

.bot-message {
    background: #e8e5ff;
    color: #333;
    margin-right: auto;
}

.user-message {
    background: #667eea;
    color: white;
    margin-left: auto;
}

.input-area {
    display: flex;
    gap: 8px;
}

input {
    flex: 1;
    min-width: 0;
    padding: 12px;
    border: 1px solid #ccc;
    border-radius: 8px;
    outline: none;
}

input:focus {
    border-color: #667eea;
}

button {
    padding: 12px 18px;
    background: #667eea;
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
}

button:hover {
    background: #5145b5;
}