:root {
  --bg: #f4f6f9;
  --card: #ffffff;
  --text: #1c2430;
  --muted: #6b7686;
  --border: #dde2e9;
  --primary: #1f6feb;
  --primary-text: #ffffff;
  --on: #1a7f37;
  --off: #b42318;
  --pending: #9a6700;
  --on-bg: #dafbe1;
  --off-bg: #ffebe9;
  --pending-bg: #fff8c5;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f141a;
    --card: #171d25;
    --text: #e6edf3;
    --muted: #8b96a5;
    --border: #2a323d;
    --primary: #3b82f6;
    --on: #3fb950;
    --off: #f85149;
    --pending: #d29922;
    --on-bg: #12261a;
    --off-bg: #2d1416;
    --pending-bg: #2b2210;
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }

[hidden] { display: none !important; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 14px/1.45 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

h1 { font-size: 20px; margin: 0; }
h2 { font-size: 18px; margin: 0 0 4px; }

label { display: grid; gap: 4px; margin-bottom: 12px; font-weight: 500; }
label.check { display: flex; align-items: center; gap: 8px; }

input, textarea, select {
  font: inherit;
  color: inherit;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 8px 10px;
  width: 100%;
}
input[type="checkbox"] { width: auto; }

button {
  font: inherit;
  font-weight: 600;
  border: 1px solid var(--primary);
  background: var(--primary);
  color: var(--primary-text);
  border-radius: 8px;
  padding: 7px 14px;
  cursor: pointer;
}
button.secondary { background: transparent; color: var(--text); border-color: var(--border); }
button.danger { background: transparent; color: var(--off); border-color: var(--border); }
button:disabled { opacity: .45; cursor: not-allowed; }
button.small { padding: 4px 10px; font-size: 13px; }

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px;
}

.login { min-height: 100vh; display: grid; place-items: center; padding: 16px; }
.login .card { width: min(380px, 100%); display: grid; gap: 12px; }

main { padding: 16px; max-width: 1400px; margin: 0 auto; display: grid; gap: 16px; }

.top { display: flex; flex-wrap: wrap; align-items: center; gap: 12px; }
.top h1 { margin-right: auto; }
.top-actions { display: flex; gap: 8px; }
.stats { display: flex; gap: 6px; flex-wrap: wrap; }
.conn { color: var(--muted); font-size: 13px; }
.conn.ok { color: var(--on); }

.settings summary { cursor: pointer; font-weight: 600; }
.settings form { margin-top: 12px; max-width: 640px; }
.row { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.msg { color: var(--muted); }

.qr-layout { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 360px); gap: 24px; margin-top: 12px; }
.qr-layout form { max-width: none; margin: 0; }
.qr-output svg { width: 100%; height: auto; display: block; border-radius: 8px; }
.steps { padding-left: 20px; margin: 16px 0 8px; color: var(--muted); }
@media (max-width: 760px) { .qr-layout { grid-template-columns: 1fr; } }

.table-wrap { overflow-x: auto; background: var(--card); border: 1px solid var(--border); border-radius: 12px; }
table { width: 100%; border-collapse: collapse; min-width: 980px; }
th, td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--border); vertical-align: top; }
th { font-size: 12px; text-transform: uppercase; letter-spacing: .03em; color: var(--muted); font-weight: 600; }
tr:last-child td { border-bottom: none; }
td small { color: var(--muted); }
td.actions { white-space: nowrap; text-align: right; }
td.actions button { margin-left: 4px; }
.url { max-width: 260px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; display: block; }

.badge { display: inline-block; padding: 2px 8px; border-radius: 999px; font-size: 12px; font-weight: 600; white-space: nowrap; }
.badge.on { color: var(--on); background: var(--on-bg); }
.badge.off { color: var(--off); background: var(--off-bg); }
.badge.pending { color: var(--pending); background: var(--pending-bg); }

.low { color: var(--off); font-weight: 600; }
.error { color: var(--off); }
.muted { color: var(--muted); margin: 0 0 12px; }
.empty { text-align: center; color: var(--muted); padding: 24px; }

dialog {
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--card);
  color: var(--text);
  width: min(460px, calc(100vw - 32px));
  padding: 20px;
}
dialog::backdrop { background: rgb(0 0 0 / .45); }
dialog menu { display: flex; justify-content: flex-end; gap: 8px; padding: 0; margin: 8px 0 0; }