body {
    margin: 0;
    background: #0f172a;
    color: white;
    font-family: Arial;
}

.container {
    display: flex;
    height: 100vh;
}

.sidebar {
    width: 250px;
    background: #111827;
    padding: 20px;
}

.sidebar h2 {
    text-align: center;
}

.sidebar button {
    width: 100%;
    padding: 12px;
    border: none;
    border-radius: 10px;
    background: #2563eb;
    color: white;
    cursor: pointer;
}

.main {
    flex: 1;
    display: flex;
    flex-direction: column;
}

#chat-box {
    flex: 1;
    overflow-y: auto;
    padding: 20px;
}

.message {
    margin-bottom: 20px;
    padding: 15px;
    border-radius: 12px;
    max-width: 70%;
}

.user {
    background: #2563eb;
    margin-left: auto;
}

.bot {
    background: #1e293b;
}

.input-area {
    display: flex;
    padding: 20px;
    background: #111827;
}

.input-area input {
    flex: 1;
    padding: 15px;
    border: none;
    border-radius: 10px;
    font-size: 16px;
}

.input-area button {
    margin-left: 10px;
    padding: 15px 20px;
    border: none;
    border-radius: 10px;
    cursor: pointer;
    background: #2563eb;
    color: white;
}