body {
    font-family: sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
    margin: 0;
    padding: 20px;
    background-color: #f0f0f0;
}

.container {
    width: 90%;
    max-width: 1000px;
    background: white;
    padding: 20px;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
    border-radius: 8px;
}

h1 {
    text-align: center;
    color: #333;
}

form {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
}

input[type="text"] {
    flex-grow: 1;
    padding: 10px;
    border: 1px solid #ccc;
    border-radius: 4px;
}

button {
    padding: 10px 20px;
    background-color: #007bff;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
}

button:hover {
    background-color: #0056b3;
}

#contentFrame {
    width: 100%;
    height: 600px;
    border: 1px solid #ccc;
    border-radius: 4px;
}