:root {
  --bg: #ffffff; --fg: #242424; --muted: #616161; --line: #e0e0e0;
  --panel: #f5f5f5; --accent: #5b5fc7; --accent-fg: #ffffff;
  --warn-bg: #fff4ce; --warn-fg: #4d3800; --warn-line: #f2c94c;
  --err-bg: #fde7e9; --err-fg: #8a0a14;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #1f1f1f; --fg: #f0f0f0; --muted: #adadad; --line: #3d3d3d;
    --panel: #292929; --accent: #7f85f5; --accent-fg: #111111;
    --warn-bg: #463100; --warn-fg: #ffe9a8; --warn-line: #a17800;
    --err-bg: #3f1011; --err-fg: #ffb3b8;
  }
}
* { box-sizing: border-box; }
body { margin: 0; padding: 16px; background: var(--bg); color: var(--fg);
  font: 15px/1.45 "Segoe UI", system-ui, -apple-system, sans-serif; }
h1 { font-size: 18px; margin: 0 0 12px; }
h2 { font-size: 14px; margin: 0 0 8px; text-transform: uppercase; letter-spacing: .04em; color: var(--muted); }
section { margin: 0 0 16px; }
code, .host, .group { font-family: ui-monospace, "Cascadia Mono", Menlo, Consolas, monospace; }
.warnings { background: var(--warn-bg); color: var(--warn-fg); border: 2px solid var(--warn-line);
  border-radius: 6px; padding: 12px 16px; }
.warnings h2 { color: var(--warn-fg); }
.warnings li { font-size: 18px; font-weight: 700; }
.target { display: grid; grid-template-columns: max-content 1fr; gap: 4px 12px; align-items: baseline; }
.target .label { color: var(--muted); }
.host { font-size: 22px; font-weight: 700; overflow-wrap: anywhere; }
.group { font-size: 18px; font-weight: 600; }
.steps ol { margin: 0; padding-left: 24px; }
.steps li { margin: 0 0 8px; }
.steps code { display: block; font-size: 16px; background: var(--panel); border: 1px solid var(--line);
  border-radius: 4px; padding: 8px; white-space: pre-wrap; overflow-wrap: anywhere; }
dl.kv { display: grid; grid-template-columns: max-content 1fr; gap: 4px 12px; margin: 0; }
dl.kv dt { color: var(--muted); }
dl.kv dd { margin: 0; overflow-wrap: anywhere; }
dl.kv dl.kv { border-left: 2px solid var(--line); padding-left: 8px; }
ol.list { margin: 0; padding-left: 20px; }
.reason blockquote { margin: 0; padding: 8px 12px; border-left: 4px solid var(--line);
  white-space: pre-wrap; overflow-wrap: anywhere; }
.note { color: var(--muted); font-size: 13px; margin: 0 0 6px; }
.error { background: var(--err-bg); color: var(--err-fg); border-radius: 6px; padding: 12px 16px; }
.error h2 { color: var(--err-fg); }
.countdown { font-weight: 700; }
footer { position: sticky; bottom: 0; background: var(--bg); border-top: 1px solid var(--line); padding: 12px 0 0; }
.buttons { display: flex; gap: 8px; justify-content: flex-end; flex-wrap: wrap; }
button { font: inherit; padding: 8px 16px; border-radius: 4px; border: 1px solid var(--line);
  background: var(--panel); color: var(--fg); cursor: pointer; }
button.primary { background: var(--accent); color: var(--accent-fg); border-color: var(--accent); font-weight: 600; }
button:disabled { opacity: .5; cursor: default; }
#status { min-height: 1.4em; margin: 0 0 8px; color: var(--muted); }
[hidden] { display: none !important; }