#file-open-help{display:none}
html.file-open body{font:16px/1.5 "Segoe UI",Arial,sans-serif;background:#f1f4f8;color:#182c45;margin:0}
html.file-open body>*:not(#file-open-help){display:none!important}
html.file-open #file-open-help{display:block;max-width:620px;margin:10vh auto;padding:32px;background:white;border:1px solid #cbd4df;border-radius:12px;box-shadow:0 12px 32px #12253e1a}
html.file-open #file-open-help h1{margin-top:0}
html.file-open #file-open-help p{margin-bottom:0}