body, html {
    margin: 10;
    padding: 10;
    font-family: 'Courier New', monospace;
    background-color: #000;
    color: #0f0;
    height: 100%;
}

#navbar {
    position: absolute;
    width: 100%;
    background-color: #000;
    padding: 10px 0;
    box-shadow: 0 2px 4px rgba(0, 255, 0, 0.5);
    z-index: 1000;
}

#navbar button {
    background-color: #222;
    border: 1px solid #0f0;
    color: #0f0;
    padding: 5px 10px;
    margin: 0 5px;
    cursor: pointer;
}

#navbar button:hover {
    background-color: #0f0;
    color: #000;
}

#content {
    margin-top: 30px;
    padding: 10px;
    margin-left: 20px;
    margin-right: 20px;
}

.hidden {
    display: none;
}

#file-list-popup {
    position: fixed;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    width: 30%;
    max-height: 60vh;
    overflow-y: auto;
    background-color: #333;
    color: #0f0;
    border: 2px solid #0f0;
    z-index: 1001;
    padding: 10px;
    box-sizing: border-box;
    border-radius: 5px;
}

.file-list-item {
    padding: 10px;
    display: block;
    text-align: center;
    border-bottom: 1px solid #0f0;
    color: #0f0;
    text-decoration: none;
    cursor: pointer;
}

.file-list-item:hover {
    background-color: #0f0;
    color: #000;
    text-decoration: none;
}

.wrapper {
    width: 100%;
    margin-bottom: 20px;
    text-align: center;
}

iframe {
    width: 100%;
    height: 80vh;
    border: none;
    background-color: white;
}

.iframe-container {
    margin-bottom: 20px;
}

.iframe-url {
    color: #0f0;
    margin-top: 5px;
}

/* Responsive Design for Mobile Devices */
@media (max-width: 600px) {
    iframe {
        height: 50vh;
    }

    #navbar button {
        padding: 5px;
        font-size: 12px;
    }

    #file-list-popup {
        width: 90%;
        max-height: 80vh;
    }
}