:root {
  --bg: #f6f7f9;
  --card: #ffffff;
  --text: #1c1f24;
  --muted: #646b75;
  --border: #d9dde3;
  --accent: #2563eb;
  --accent-text: #ffffff;
  --warning-bg: #fff4d6;
  --warning-text: #6b4e00;
  --danger: #c0262d;
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #15171b;
    --card: #1e2127;
    --text: #e8eaed;
    --muted: #9aa1ab;
    --border: #343941;
    --accent: #5b8cff;
    --accent-text: #0b0d10;
    --warning-bg: #3a3014;
    --warning-text: #f3d98b;
    --danger: #ff6b70;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

header {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
  justify-content: space-between;
  align-items: center;
  padding: 12px 16px;
  background: var(--card);
  border-bottom: 1px solid var(--border);
}

.brand { font-weight: 600; color: var(--text); text-decoration: none; }

main { max-width: 720px; margin: 0 auto; padding: 16px; }

h1 { font-size: 1.5rem; margin: 8px 0 16px; }
h2 { font-size: 1.15rem; margin: 28px 0 12px; }

a { color: var(--accent); }

.muted { color: var(--muted); font-size: 0.92rem; }

.warning {
  background: var(--warning-bg);
  color: var(--warning-text);
  padding: 10px 12px;
  border-radius: 8px;
}

button, .button {
  display: inline-block;
  font: inherit;
  padding: 8px 14px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--text);
  text-decoration: none;
  cursor: pointer;
}

button.primary, .button.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--accent-text);
}

button.danger { color: var(--danger); }

textarea, select, input {
  max-width: 100%;
  font: inherit;
  color: var(--text);
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 8px 10px;
}

textarea {
  display: block;
  width: 100%;
  margin-bottom: 8px;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.85rem;
  word-break: break-all;
  resize: vertical;
}

form { margin: 0; }
form.stack { display: grid; grid-template-columns: minmax(0, 1fr); gap: 12px; max-width: 420px; }
form.stack label { display: grid; grid-template-columns: minmax(0, 1fr); gap: 4px; }
form.stack select { width: 100%; }
form.inline { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
form.inline input[type="number"] { width: 5em; }

ul.devices, ul.members, ul.events { list-style: none; padding: 0; margin: 0; }

ul.devices > li, ul.members > li {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px;
  margin-bottom: 10px;
  display: grid;
  gap: 8px;
}

ul.devices > li > div:first-child { display: grid; gap: 2px; }

ul.devices.compact > li { padding: 6px 10px; margin-bottom: 6px; display: block; }

.status { color: var(--muted); font-size: 0.92rem; }

.actions { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }

ul.events li { padding: 4px 0; border-bottom: 1px solid var(--border); font-size: 0.92rem; }

.qr { display: flex; flex-wrap: wrap; gap: 12px; }
.qr figure { margin: 0; text-align: center; }
.qr img { width: 260px; max-width: 100%; height: auto; background: #fff; padding: 8px; border-radius: 8px; }