:root {
  --bg: #f1f5f9; --card: #fff; --text: #0f172a; --muted: #64748b; --line: #e2e8f0;
  --on: #16a34a; --off: #94a3b8; --warn: #d97706; --bad: #dc2626; --accent: #2563eb;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #0b1120; --card: #111827; --text: #e5e7eb; --muted: #94a3b8; --line: #1f2937; color-scheme: dark; }
}
* { box-sizing: border-box; }
body {
  margin: 0; background: var(--bg); color: var(--text);
  font: 16px/1.4 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  padding: env(safe-area-inset-top) 16px env(safe-area-inset-bottom);
  max-width: 560px; margin-inline: auto;
}
header { display: flex; align-items: center; justify-content: space-between; padding-block: 16px; }
h1 { font-size: 1.3rem; margin: 0; }
h2 { font-size: 1rem; margin: 0 0 8px; }
.pill { font-size: .85rem; padding: 4px 10px; border-radius: 999px; background: var(--line); }
.pill.online { background: var(--on); color: #fff; }
.pill.offline { background: var(--bad); color: #fff; }
.card, .relay { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 14px 16px; margin-bottom: 12px; }
.relay { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.relay .name { font-weight: 600; }
.relay .state { font-size: .85rem; color: var(--muted); }
.relay .state.pending { color: var(--warn); }
.switch { position: relative; width: 64px; height: 36px; border: 0; border-radius: 18px; background: var(--off); cursor: pointer; flex: none; }
.switch::after { content: ""; position: absolute; top: 4px; left: 4px; width: 28px; height: 28px; border-radius: 50%; background: #fff; transition: transform .15s; }
.switch[aria-checked="true"] { background: var(--on); }
.switch[aria-checked="true"]::after { transform: translateX(28px); }
.switch:disabled { opacity: .5; cursor: wait; }
dl { display: grid; grid-template-columns: auto 1fr; gap: 4px 12px; margin: 0; font-size: .95rem; }
dt { color: var(--muted); }
dd { margin: 0; }
summary { font-weight: 600; cursor: pointer; }
.hint { color: var(--muted); font-size: .85rem; }
.buttons { display: flex; flex-wrap: wrap; gap: 8px; }
button { font: inherit; }
.buttons button { padding: 8px 12px; border-radius: 8px; border: 1px solid var(--line); background: var(--bg); color: var(--text); cursor: pointer; }
.buttons button[data-confirm] { border-color: var(--warn); }
.buttons button.armed { background: var(--warn); color: #fff; }
.error { background: var(--bad); color: #fff; padding: 10px 12px; border-radius: 8px; }
.empty { color: var(--muted); text-align: center; padding: 24px 0; }
footer { display: flex; justify-content: space-between; align-items: center; color: var(--muted); font-size: .85rem; padding-block: 16px 24px; }
.link { background: none; border: 0; color: var(--accent); cursor: pointer; padding: 0; }
.primary { padding: 8px 14px; border-radius: 8px; border: 0; background: var(--accent); color: #fff; cursor: pointer; }
.users { list-style: none; padding: 0; margin: 8px 0 12px; }
.users li { display: flex; align-items: center; justify-content: space-between; gap: 8px; padding: 8px 0; border-bottom: 1px solid var(--line); }
.users .who { overflow-wrap: anywhere; }
.users .role { color: var(--muted); font-size: .85rem; }
.users button { padding: 6px 10px; border-radius: 8px; border: 1px solid var(--bad); background: none; color: var(--bad); cursor: pointer; }
.users button.armed { background: var(--bad); color: #fff; }
.add-user { display: flex; flex-wrap: wrap; gap: 8px; }
.add-user input, .add-user select { font: inherit; padding: 8px 10px; border-radius: 8px; border: 1px solid var(--line); background: var(--bg); color: var(--text); }
.add-user input { flex: 1 1 200px; min-width: 0; }