body {
    font-family: sans-serif;
    line-height: 1.6;
    margin: 0;
    padding: 0;
    background: #f4f4f4;
    color: #333;
}

header {
    background: #333;
    color: #fff;
    padding: 1rem 0;
    text-align: center;
}

nav {
    margin-top: 1rem;
}

.tab-button {
    background: #444;
    color: #fff;
    border: none;
    padding: 0.5rem 1rem;
    cursor: pointer;
}

.tab-button.active {
    background: #f4f4f4;
    color: #333;
}

main {
    padding: 1rem;
    margin: 0 1rem;
    padding-bottom: 5rem; /* Add padding to avoid footer overlap */
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

#chat-container {
    max-width: 600px;
    margin: 2rem auto;
    border: 1px solid #ccc;
    padding: 1rem;
}

#chat-history {
    height: 300px;
    overflow-y: auto;
    border-bottom: 1px solid #ccc;
    margin-bottom: 1rem;
}

#chat-input {
    display: flex;
}

#user-question {
    flex: 1;
    padding: 0.5rem;
}

#send-button {
    background: #333;
    color: #fff;
    border: none;
    padding: 0.5rem 1rem;
    cursor: pointer;
}

footer {
    text-align: center;
    padding: 1rem 0;
    background: #333;
    color: #fff;
    width: 100%;
}