:root {
  --bg: #ffffff;
  --bg-soft: #fafafa;
  --bg-hover: #f5f5f5;
  --border: #eaeaea;
  --border-strong: #d4d4d4;
  --text: #0a0a0a;
  --text-2: #525252;
  --text-3: #a3a3a3;
  --accent: #0070f3;
  --accent-soft: #f0f7ff;
  --green: #16a34a;
  --red: #dc2626;
  --amber: #d97706;
  --shadow: none;
  --radius: 8px;
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html, body { height: 100%; }
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  font-size: 14px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  font-feature-settings: 'cv11', 'ss01', 'ss03';
}

/* ---------- layout ---------- */
.shell { display: flex; min-height: 100vh; }

.side {
  width: 240px; flex-shrink: 0;
  background: var(--bg-soft);
  border-right: 1px solid var(--border);
  display: flex; flex-direction: column;
  padding: 20px 12px;
}
.brand { display: flex; align-items: center; gap: 10px; padding: 4px 8px 24px; }
.dot { width: 10px; height: 10px; border-radius: 50%; background: #000; }
.name { font-weight: 600; font-size: 14px; letter-spacing: -0.01em; }
.sub { font-size: 11px; color: var(--text-3); margin-top: 1px; }

.nav { display: flex; flex-direction: column; gap: 1px; flex: 1; }
.nav-item {
  display: flex; align-items: center; gap: 10px;
  padding: 7px 10px; border-radius: 6px;
  color: var(--text-2); cursor: pointer; user-select: none;
  font-size: 13px; font-weight: 450;
  transition: background .12s, color .12s;
}
.nav-item:hover { background: var(--bg-hover); color: var(--text); }
.nav-item.active { background: #000; color: #fff; }
.nav-item.active .badge { background: #fff; color: #000; }
.nav-item .ico { width: 16px; height: 16px; flex-shrink: 0; }
.nav-item .badge { margin-left: auto; }

.foot { border-top: 1px solid var(--border); padding-top: 14px; display: flex; flex-direction: column; gap: 8px; padding-inline: 6px; }
.conn { display: flex; align-items: center; gap: 7px; font-size: 12px; color: var(--text-2); }
.cdot { width: 7px; height: 7px; border-radius: 50%; background: var(--text-3); flex-shrink: 0; }
.conn.on .cdot { background: var(--green); }
.conn.off .cdot { background: var(--text-3); }

.main { flex: 1; display: flex; flex-direction: column; min-width: 0; }
.top {
  display: flex; align-items: center; justify-content: space-between;
  padding: 16px 28px;
  border-bottom: 1px solid var(--border);
}
.top h1 { font-size: 16px; font-weight: 600; letter-spacing: -0.01em; }
.top-r { display: flex; align-items: center; gap: 14px; }

.content { padding: 28px; max-width: 1200px; width: 100%; }

/* ---------- common ---------- */
.hidden { display: none !important; }
.muted { color: var(--text-3); font-size: 12px; }
.err { color: var(--red); font-size: 12px; margin-top: 8px; }
.empty { color: var(--text-3); padding: 48px 0; text-align: center; font-size: 13px; }
.row { display: flex; align-items: center; gap: 10px; }
.section-h { font-size: 13px; font-weight: 600; margin-bottom: 12px; color: var(--text); }
.section-h .muted { font-weight: 400; margin-left: 6px; }

/* ---------- buttons / inputs ---------- */
.btn {
  border: 1px solid var(--border); background: var(--bg);
  color: var(--text); padding: 7px 12px; border-radius: 6px;
  cursor: pointer; font-size: 13px; font-weight: 500;
  font-family: var(--font);
  transition: background .12s, border-color .12s, color .12s;
}
.btn:hover { border-color: var(--border-strong); background: var(--bg-hover); }
.btn.primary { background: #000; border-color: #000; color: #fff; }
.btn.primary:hover { background: #1f1f1f; border-color: #1f1f1f; }
.btn.sm { padding: 4px 9px; font-size: 12px; }
.btn:disabled { opacity: .5; cursor: not-allowed; }

.link {
  background: none; border: 0; padding: 4px 2px;
  color: var(--text-2); cursor: pointer; font-size: 13px;
  font-family: var(--font); font-weight: 500;
}
.link:hover { color: var(--text); }

input[type=text], select {
  background: var(--bg); border: 1px solid var(--border);
  color: var(--text); padding: 7px 10px; border-radius: 6px;
  font-size: 13px; font-family: var(--font);
  transition: border-color .12s;
}
input[type=text]:focus, select:focus { outline: none; border-color: #000; }
input[type=text]::placeholder { color: var(--text-3); }

/* ---------- cards / grid ---------- */
.grid { display: grid; gap: 16px; }
.g4 { grid-template-columns: repeat(4, 1fr); }
.g3 { grid-template-columns: repeat(3, 1fr); }
.g2 { grid-template-columns: repeat(2, 1fr); }
@media (max-width: 1024px) { .g4, .g3 { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 640px)  { .g4, .g3, .g2 { grid-template-columns: 1fr; } }

.card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px 20px;
}
.card-h { font-size: 11px; font-weight: 600; color: var(--text-3); text-transform: uppercase; letter-spacing: .04em; margin-bottom: 14px; }

.kpi { font-size: 28px; font-weight: 600; letter-spacing: -0.02em; }
.kpi small { font-size: 13px; font-weight: 400; color: var(--text-3); margin-left: 4px; }
.kpi-sub { font-size: 12px; color: var(--text-3); margin-top: 4px; }
.kpi-good { color: var(--green); }
.kpi-bad  { color: var(--red); }
.kpi-warn { color: var(--amber); }

/* ---------- table ---------- */
.tbl { width: 100%; border-collapse: collapse; font-size: 13px; }
.tbl th, .tbl td { padding: 10px 14px; text-align: left; border-bottom: 1px solid var(--border); }
.tbl th { font-weight: 500; color: var(--text-3); font-size: 11px; text-transform: uppercase; letter-spacing: .04em; background: var(--bg-soft); }
.tbl tbody tr:hover { background: var(--bg-soft); }
.tbl td.wrap { white-space: normal; max-width: 460px; }
.mono { font-family: ui-monospace, 'SF Mono', Menlo, Consolas, monospace; font-size: 12px; }
.tbl-wrap { border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; background: var(--bg); }

/* ---------- tags / dots ---------- */
.tag { display: inline-flex; align-items: center; gap: 5px; font-size: 11px; font-weight: 500; padding: 2px 8px; border-radius: 4px; border: 1px solid var(--border); background: var(--bg-soft); color: var(--text-2); }
.tag::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--text-3); }
.tag.good    { color: var(--green); border-color: #bbf7d0; background: #f0fdf4; }
.tag.good::before    { background: var(--green); }
.tag.bad     { color: var(--red);   border-color: #fecaca; background: #fef2f2; }
.tag.bad::before     { background: var(--red); }
.tag.warn    { color: var(--amber); border-color: #fed7aa; background: #fffbeb; }
.tag.warn::before    { background: var(--amber); }
.tag.info    { color: var(--accent);border-color: #bfdbfe; background: var(--accent-soft); }
.tag.info::before    { background: var(--accent); }
.tag.muted::before   { background: var(--text-3); }

.badge { display: inline-block; min-width: 18px; padding: 0 5px; height: 16px; line-height: 16px; border-radius: 8px; font-size: 10px; font-weight: 600; background: var(--red); color: #fff; text-align: center; }

/* ---------- filters ---------- */
.filters { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; margin-bottom: 14px; }
.filters input[type=text] { min-width: 180px; }
.switch { display: inline-flex; align-items: center; gap: 6px; color: var(--text-2); font-size: 12px; cursor: pointer; }

/* ---------- modal ---------- */
.overlay { position: fixed; inset: 0; background: rgba(0,0,0,.4); display: flex; align-items: center; justify-content: center; z-index: 50; }
.dialog { background: var(--bg); border: 1px solid var(--border); border-radius: 10px; padding: 28px; width: 440px; max-width: 92vw; position: relative; }
.dialog h2 { font-size: 17px; font-weight: 600; letter-spacing: -0.01em; margin-bottom: 8px; }
.dialog p { font-size: 13px; margin-bottom: 14px; }
.dialog input { width: 100%; }
.dialog .row { justify-content: flex-end; margin-top: 14px; }
.dialog .x { position: absolute; top: 10px; right: 12px; background: none; border: 0; font-size: 20px; line-height: 1; color: var(--text-3); cursor: pointer; padding: 4px 8px; border-radius: 4px; }
.dialog .x:hover { color: var(--text); background: var(--bg-hover); }

/* ---------- banner ---------- */
.banner { border: 1px solid var(--border); border-left: 3px solid var(--amber); background: var(--bg-soft); padding: 10px 14px; border-radius: 6px; margin-bottom: 16px; font-size: 13px; }

/* ---------- detect rules ---------- */
.rule { display: flex; align-items: center; justify-content: space-between; gap: 14px; padding: 12px 14px; border: 1px solid var(--border); border-radius: 8px; margin-bottom: 8px; }
.rule-label { font-size: 13px; font-weight: 500; }
.rule-desc  { font-size: 12px; color: var(--text-3); margin-top: 2px; }
.rule input[type=text], .rule input[type=time], .rule input[type=number] { width: 130px; }
.toggle { position: relative; width: 34px; height: 20px; flex-shrink: 0; }
.toggle input { opacity: 0; width: 0; height: 0; }
.toggle .slider { position: absolute; inset: 0; background: var(--border-strong); border-radius: 20px; cursor: pointer; transition: .15s; }
.toggle .slider::before { content: ""; position: absolute; width: 14px; height: 14px; left: 3px; top: 3px; background: #fff; border-radius: 50%; transition: .15s; }
.toggle input:checked + .slider { background: #000; }
.toggle input:checked + .slider::before { transform: translateX(14px); }

.alert { padding: 10px 14px; border: 1px solid var(--border); border-radius: 8px; margin-bottom: 6px; font-size: 13px; }
.alert.fail { border-left: 3px solid var(--red); }
.alert.miss { border-left: 3px solid var(--amber); }
.alert.err  { border-left: 3px solid var(--red); }
.alert.slow { border-left: 3px solid var(--accent); }
.alert.kw   { border-left: 3px solid var(--text-2); }

/* ---------- chart ---------- */
.chart-box { position: relative; height: 240px; }
.chart-box.tall { height: 320px; }