body {
    margin: 0;
    font-family: Arial, sans-serif;
}

button {
    margin: 20px;
}

#output {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 33vh; /* Top third of the screen */
    background-color: #333; /* Slightly darker background */
    color: #fff;
    overflow-y: scroll;
    padding: 10px;
    box-sizing: border-box;
    border-bottom: 1px solid #555;
}