#iframe-container {
    display: flex;
        justify-content: space-between;
}

#content-frame-before,
#content-frame-diff,
#content-frame-after {
    width: 32%;
    border: none;
}

#nav-buttons {
    display: flex;
    justify-content: space-between;
    margin-bottom: 10px;
}

button {
    padding: 10px 20px;
    font-size: 16px;
    background-color: #007BFF;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    transition: background-color 0.3s;
}

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

button:disabled {
    background-color: #cccccc;
    cursor: not-allowed;
}

ul {
    column-count: 4;
    column-gap: 20px;
}

li {
    break-inside: avoid;
    line-height: 2;
    font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    font-size: 20px;
}