body {
    font-family: Arial, sans-serif;
    background: #f4f6f9;
    margin: 0;
    padding: 0;
}

header {
    background: #2b4c7e;
    color: white;
    padding: 20px;
    text-align: center;
}

#chat-container {
    width: 90%;
    max-width: 900px;
    margin: 20px auto;
    background: white;
    border-radius: 10px;
    padding: 20px;
}

#messages {
    height: 400px;
    overflow-y: auto;
    border: 1px solid #ddd;
    padding: 10px;
    border-radius: 10px;
    background: #fafafa;
}

.message {
    margin: 10px 0;
    padding: 12px;
    border-radius: 10px;
    max-width: 75%;
}

.user {
    background: #d0e6ff;
    align-self: flex-end;
}

.ai {
    background: #e8e8e8;
}

#controls {
    margin-top: 20px;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

textarea {
    width: 100%;
    height: 80px;
    padding: 10px;
    border-radius: 10px;
    border: 1px solid #ccc;
}

button {
    padding: 12px;
    background: #2b4c7e;
    color: white;
    border: none;
    border-radius: 10px;
    cursor: pointer;
}

button:hover {
    background: #1f3558;
}