body { font-family: Arial, sans-serif; } .container { max-width: 800px; margin: auto; padding: 20px; } .floating-menu { position: fixed; top: 10px; right: 10px; background: #fff; padding: 10px; border: 1px solid #ccc; } .menu-toggle { cursor: pointer; } .collapsible-header { cursor: pointer; padding: 10px; background: #f5f5f5; } .collapsible-header:hover { background: #e0e0e0; } .file-preview { max-width: 200px; display: none; margin-top: 10px; } .action-btn { margin: 0 5px; padding: 5px 10px; } .guest-notice { color: #888; font-style: italic; } .error { color: red; } .success { color: green; } ul { list-style: none; padding: 0; } li { margin: 10px 0; } form { display: inline; margin-left: 10px; }