:root {
    --bg: #f6f7f9; --card: #fff; --text: #1d2330; --muted: #6b7280; --line: #e3e6eb;
    --accent: #2f6fdf; --on: #1f9d55; --err: #c0392b;
    color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
    :root { --bg: #14171c; --card: #1d2128; --text: #e7e9ee; --muted: #9aa1ad; --line: #2c313a; --accent: #6c9cff; --on: #3ccf7f; --err: #ff6b5b; }
}
* { box-sizing: border-box; }
body { margin: 0; font: 15px/1.45 system-ui, -apple-system, "Segoe UI", sans-serif; background: var(--bg); color: var(--text); }
main { max-width: 1200px; margin: 0 auto; padding: 16px; }
.bar { display: flex; justify-content: space-between; align-items: center; padding: 10px 16px; border-bottom: 1px solid var(--line); background: var(--card); }
.brand { font-weight: 600; color: var(--text); text-decoration: none; }
h1 { font-size: 1.3rem; margin: 0 0 12px; }
h2 { font-size: 1rem; margin: 24px 0 8px; color: var(--muted); font-weight: 600; }
.tabs { display: flex; gap: 6px; flex-wrap: wrap; }
.tabs a { padding: 6px 14px; border-radius: 999px; border: 1px solid var(--line); color: var(--text); text-decoration: none; background: var(--card); }
.tabs a.active { background: var(--accent); border-color: var(--accent); color: #fff; }
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 12px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 12px; }
.card.narrow { max-width: 360px; margin: 40px auto; display: grid; gap: 12px; }
.device header { display: flex; align-items: center; gap: 8px; margin-bottom: 8px; }
.device header strong { flex: 1; }
.dot { width: 9px; height: 9px; border-radius: 50%; background: var(--muted); flex: none; }
.dot.on { background: var(--on); }
.dp { display: flex; justify-content: space-between; align-items: center; gap: 8px; padding: 4px 0; border-top: 1px solid var(--line); }
.code { font-family: ui-monospace, monospace; font-size: .85em; color: var(--muted); }
.range { display: flex; align-items: center; gap: 6px; }
.range input { width: 110px; }
output { min-width: 3.5em; text-align: right; font-variant-numeric: tabular-nums; }
button { font: inherit; cursor: pointer; }
.toggle { min-width: 56px; padding: 4px 10px; border-radius: 999px; border: 1px solid var(--line); background: var(--bg); color: var(--text); }
.toggle.on { background: var(--on); border-color: var(--on); color: #fff; }
.primary { padding: 8px; border: 0; border-radius: 6px; background: var(--accent); color: #fff; }
.link { background: none; border: 0; color: var(--accent); padding: 0; }
input, select { font: inherit; padding: 6px 8px; border: 1px solid var(--line); border-radius: 6px; background: var(--bg); color: var(--text); }
label { display: grid; gap: 4px; }
.flash { padding: 8px 12px; border-radius: 6px; background: var(--card); border-left: 4px solid var(--on); }
.flash.error, .error { border-left-color: var(--err); color: var(--err); }
.muted { color: var(--muted); }
.small { font-size: .85em; }
dl { display: grid; grid-template-columns: auto 1fr; gap: 2px 10px; margin: 6px 0 0; }
dt { font-family: ui-monospace, monospace; color: var(--muted); }
dd { margin: 0; word-break: break-all; }