:root{--bg:#f7f8fa;--fg:#1b2430;--muted:#5b6675;--line:#d5dbe3;--fout:#a3261b}
@media (prefers-color-scheme:dark){:root{--bg:#0b111a;--fg:#e8eef5;--muted:#9aa8b8;--line:#2a3646;--fout:#ff8a80}}
*{box-sizing:border-box}html,body{height:100%}
body{margin:0;background:var(--bg);color:var(--fg);font:16px/1.5 system-ui,-apple-system,"Segoe UI",sans-serif;display:flex;flex-direction:column}
header{display:flex;justify-content:space-between;align-items:center;padding:10px 16px;border-bottom:1px solid var(--line)}
.merk{font-weight:700}button{font:inherit;padding:6px 12px;border:1px solid var(--line);border-radius:6px;background:transparent;color:inherit;cursor:pointer}
.uitleg{margin:8px 16px;color:var(--muted);font-size:14px}#status{margin:8px 16px}#status:empty{display:none}.fout{color:var(--fout)}
iframe{flex:1;width:100%;border:0;border-top:1px solid var(--line);min-height:480px}iframe[hidden]{display:none}