:root {
  --bg: #f4f6f1; --panel: #ffffff; --ink: #1d2a1f; --muted: #5d6b60; --line: #dfe5da;
  --accent: #2f7d4a; --accent-ink: #ffffff; --accent-soft: #e3f0e6; --warn: #b4531a; --bad: #b3261e; --ok: #2f7d4a;
  --radius: 10px; --shadow: 0 1px 2px rgba(20,40,20,.06), 0 4px 16px rgba(20,40,20,.05);
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #121714; --panel: #1a211c; --ink: #e5ece6; --muted: #9aa89d; --line: #2a342d;
    --accent: #5cb87a; --accent-ink: #0f1a12; --accent-soft: #1f3326; --warn: #e08a4f; --bad: #ef6b62; --ok: #5cb87a;
    --shadow: none; color-scheme: dark;
  }
}
* { box-sizing: border-box; }
html, body { margin: 0; }
body { background: var(--bg); color: var(--ink); font: 15px/1.45 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; }
a { color: var(--accent); }
header.top { display: flex; align-items: center; gap: 16px; padding: 12px 20px; background: var(--panel); border-bottom: 1px solid var(--line); }
header.top .brand { font-weight: 700; font-size: 18px; color: var(--ink); text-decoration: none; letter-spacing: .2px; }
header.top .brand span { color: var(--accent); }
header.top nav { margin-left: auto; display: flex; gap: 14px; align-items: center; flex-wrap: wrap; }
header.top nav a { text-decoration: none; color: var(--muted); }
header.top nav a:hover { color: var(--ink); }
main { max-width: 1100px; margin: 0 auto; padding: 24px 16px 48px; }
h1 { font-size: 24px; margin: 0 0 4px; }
h2 { font-size: 17px; margin: 0 0 12px; }
.sub { color: var(--muted); margin: 0 0 20px; }
.card { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 18px; box-shadow: var(--shadow); margin-bottom: 18px; }
.grid { display: grid; gap: 14px; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); }
.row { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.spacer { flex: 1; }
label { display: block; font-size: 13px; color: var(--muted); margin-bottom: 4px; }
input, select, textarea { font: inherit; color: var(--ink); background: var(--bg); border: 1px solid var(--line); border-radius: 8px; padding: 8px 10px; width: 100%; }
input:focus, select:focus, textarea:focus { outline: 2px solid var(--accent); outline-offset: -1px; }
.field { margin-bottom: 12px; }
button, .btn { font: inherit; cursor: pointer; border: 1px solid var(--accent); background: var(--accent); color: var(--accent-ink); border-radius: 8px; padding: 8px 14px; text-decoration: none; display: inline-block; white-space: nowrap; }
button.ghost, .btn.ghost { background: transparent; color: var(--accent); }
button.small { padding: 4px 10px; font-size: 13px; }
button.danger { background: transparent; border-color: var(--bad); color: var(--bad); }
button:disabled { opacity: .5; cursor: default; }
.seg { display: inline-flex; border: 1px solid var(--line); border-radius: 8px; overflow: hidden; }
.seg button { border: 0; border-radius: 0; background: transparent; color: var(--muted); padding: 6px 12px; }
.seg button.on { background: var(--accent-soft); color: var(--ink); font-weight: 600; }
.seg button:disabled { opacity: .35; }
.pill { display: inline-flex; align-items: center; gap: 6px; font-size: 13px; padding: 2px 10px; border-radius: 999px; background: var(--bg); border: 1px solid var(--line); color: var(--muted); }
.dot { width: 8px; height: 8px; border-radius: 50%; background: var(--muted); display: inline-block; }
.dot.on { background: var(--ok); } .dot.off { background: var(--bad); }
.msg { padding: 10px 12px; border-radius: 8px; margin: 10px 0; font-size: 14px; display: none; }
.msg.show { display: block; }
.msg.err { background: color-mix(in srgb, var(--bad) 12%, transparent); color: var(--bad); }
.msg.ok { background: var(--accent-soft); color: var(--ink); }
table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { text-align: left; padding: 8px 6px; border-bottom: 1px solid var(--line); vertical-align: middle; }
th { color: var(--muted); font-weight: 600; font-size: 12px; text-transform: uppercase; letter-spacing: .4px; }
.table-wrap { overflow-x: auto; }
.device-card { display: block; text-decoration: none; color: inherit; }
.device-card:hover { border-color: var(--accent); }
.device-card .name { font-weight: 600; font-size: 16px; }
.kv { color: var(--muted); font-size: 13px; }
.muted { color: var(--muted); }
.mono { font-family: ui-monospace, Consolas, monospace; }
.auth { max-width: 380px; margin: 48px auto; }
.hero { text-align: center; margin: 36px 0 8px; }
.hero h1 { font-size: 30px; }
.chips { display: flex; flex-wrap: wrap; gap: 6px; }
.chip { font-size: 13px; padding: 3px 10px; border-radius: 999px; border: 1px solid var(--line); cursor: pointer; user-select: none; background: var(--panel); }
.chip.on { border-color: transparent; color: #fff; }
.stats { display: grid; grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); gap: 10px; }
.stat { background: var(--bg); border: 1px solid var(--line); border-radius: 8px; padding: 10px; }
.stat .k { font-size: 12px; color: var(--muted); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.stat .v { font-size: 20px; font-weight: 600; font-variant-numeric: tabular-nums; }
#chart { width: 100%; min-height: 380px; }
.uplot, .uplot * { color: var(--ink); }
.u-legend { font-size: 13px; }
footer { text-align: center; color: var(--muted); font-size: 12px; padding: 24px; }
.hidden { display: none !important; }
@media (max-width: 600px) { header.top { flex-wrap: wrap; } main { padding: 16px 12px 40px; } }
td.row { display: table-cell; }
td.row > * { margin: 2px 6px 2px 0; vertical-align: middle; }
td.mono { white-space: nowrap; }
.seg { flex-wrap: wrap; max-width: 100%; }