:root {
  --bg: #f7f6f3; --panel: #ffffff; --border: #e3e0d9; --text: #1d1b18; --muted: #6b665d;
  --accent: #d9622b; --accent-text: #ffffff; --ok: #2f8a4c; --bad: #c0392b;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #141312; --panel: #1d1c1a; --border: #33302c; --text: #f1eee8; --muted: #a39d93;
          --accent: #ee7a43; --ok: #59c27a; --bad: #ef6b5b; }
}
* { box-sizing: border-box; }
[hidden] { display: none !important; }
body { margin: 0; background: var(--bg); color: var(--text); font: 15px/1.5 system-ui, -apple-system, "Segoe UI", sans-serif; }
.top { display: flex; align-items: center; justify-content: space-between; padding: 14px 20px; border-bottom: 1px solid var(--border); }
.brand { font-weight: 700; font-size: 17px; }
.who { display: flex; gap: 10px; align-items: center; color: var(--muted); font-size: 14px; }
main { max-width: 880px; margin: 0 auto; padding: 24px 16px; display: grid; gap: 16px; }
h1 { font-size: 30px; margin: 12px 0 6px; }
h2 { font-size: 17px; margin: 0 0 6px; }
.lead { color: var(--muted); max-width: 560px; }
.card { background: var(--panel); border: 1px solid var(--border); border-radius: 10px; padding: 16px; }
.narrow { max-width: 380px; display: grid; gap: 10px; }
label { display: grid; gap: 4px; font-size: 13px; color: var(--muted); }
input { font: inherit; padding: 8px 10px; border-radius: 6px; border: 1px solid var(--border); background: var(--bg); color: var(--text); }
button { font: inherit; font-size: 14px; padding: 7px 12px; border-radius: 6px; border: 1px solid var(--border); background: transparent; color: var(--text); cursor: pointer; }
button:hover { border-color: var(--accent); }
button.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-text); }
button:disabled { opacity: .5; cursor: default; }
.row { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.row.space { justify-content: space-between; }
.tabs { display: flex; gap: 4px; }
.tabs button[aria-selected="true"] { border-color: var(--accent); color: var(--accent); }
.muted { color: var(--muted); font-size: 13px; }
.error { color: var(--bad); font-size: 13px; min-height: 1em; margin: 0; }
code { font: 12px ui-monospace, Menlo, monospace; color: var(--muted); word-break: break-all; }
#code-form input { text-transform: uppercase; letter-spacing: 2px; width: 150px; font-family: ui-monospace, Menlo, monospace; }
.machine { display: grid; grid-template-columns: auto 1fr auto; gap: 4px 12px; padding: 10px 0; border-top: 1px solid var(--border); align-items: start; }
.machine:first-child { border-top: 0; }
.dot { width: 9px; height: 9px; border-radius: 50%; margin-top: 7px; background: var(--muted); }
.dot.on { background: var(--ok); }
.machine .name { font-weight: 600; }
footer { text-align: center; padding: 24px 16px; }
@media (max-width: 520px) { h1 { font-size: 24px; } .machine { grid-template-columns: auto 1fr; } .machine button { grid-column: 2; justify-self: start; } }
button.link { border: 0; padding: 0; color: var(--muted); font-size: 13px; text-decoration: underline; justify-self: start; }
.notice { border-color: var(--accent); }
pre { font: 13px ui-monospace, Menlo, monospace; background: var(--bg); padding: 10px; border-radius: 6px; user-select: all; }
details { margin-top: 10px; }
summary { cursor: pointer; color: var(--muted); font-size: 13px; }
#security form.narrow { margin-top: 8px; }