:root {
  color-scheme: light;
  --page: #f4f3ef; --surface: #fcfcfb; --border: #e1e0d9;
  --ink: #0b0b0b; --ink-2: #52514e; --muted: #898781;
  --grid: #e1e0d9; --axis: #c3c2b7;
  --series-1: #2a78d6; --series-1-soft: rgba(42,120,214,0.14); --series-1b: #86b6ef;
  --state-on: #eb6834; --state-off: #c3c2b7; --state-unknown: #e1e0d9; --state-unknown-ink: #898781;
  --good: #0ca30c; --warning: #fab219; --critical: #d03b3b;
  --accent: #2a78d6; --cursor: #0b0b0b;
  --radius: 10px;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark;
    --page: #121211; --surface: #1a1a19; --border: #2c2c2a;
    --ink: #ffffff; --ink-2: #c3c2b7; --muted: #898781;
    --grid: #2c2c2a; --axis: #383835;
    --series-1: #3987e5; --series-1-soft: rgba(57,135,229,0.18); --series-1b: #1c5cab;
    --state-on: #d95926; --state-off: #52514e; --state-unknown: #2c2c2a; --state-unknown-ink: #898781;
    --accent: #3987e5; --cursor: #ffffff;
  }
}
* { box-sizing: border-box; }
html, body { margin: 0; }
body { background: var(--page); color: var(--ink); font-size: 14px; line-height: 1.45; }
button { font: inherit; color: inherit; }
.muted { color: var(--muted); }
.sub { color: var(--ink-2); }

/* ---------- login ---------- */
.login-wrap { min-height: 100vh; display: grid; place-items: center; padding: 16px; }
.login-card { width: 100%; max-width: 360px; background: var(--surface); border: 1px solid var(--border);
  border-radius: 14px; padding: 28px 24px; }
.brand { font-weight: 700; letter-spacing: 0.02em; font-size: 18px; }
.brand span { color: var(--accent); }
.login-card h1 { font-size: 20px; margin: 18px 0 4px; }
.login-card p { margin: 0 0 18px; color: var(--ink-2); }
.login-card label { display: block; font-size: 13px; color: var(--ink-2); margin-bottom: 6px; }
.login-card input { width: 100%; padding: 10px 12px; font-size: 16px; border-radius: 8px;
  border: 1px solid var(--axis); background: var(--page); color: var(--ink); }
.login-card input:focus { outline: 2px solid var(--accent); outline-offset: 1px; }
.primary { margin-top: 14px; width: 100%; padding: 10px 12px; border: 0; border-radius: 8px;
  background: var(--accent); color: #fff; font-weight: 600; cursor: pointer; }
.primary:disabled { opacity: 0.6; cursor: default; }
.error { color: var(--critical); min-height: 20px; margin-top: 10px; font-size: 13px; }

/* ---------- dashboard ---------- */
header.top { display: flex; flex-wrap: wrap; align-items: center; gap: 10px 18px;
  padding: 14px 20px; background: var(--surface); border-bottom: 1px solid var(--border); }
header.top .site { font-weight: 600; }
header.top .site small { font-weight: 400; color: var(--muted); margin-left: 6px; }
.fresh { display: flex; flex-wrap: wrap; gap: 8px; margin-left: auto; }
.chip { display: inline-flex; align-items: center; gap: 6px; padding: 3px 9px; border-radius: 999px;
  border: 1px solid var(--border); font-size: 12px; color: var(--ink-2); white-space: nowrap; }
.dot { width: 8px; height: 8px; border-radius: 50%; background: var(--muted); }
.dot.good { background: var(--good); } .dot.warning { background: var(--warning); }
.dot.critical { background: var(--critical); }
.linkbtn { background: none; border: 1px solid var(--border); border-radius: 8px; padding: 4px 10px;
  cursor: pointer; color: var(--ink-2); }

main { max-width: 1320px; margin: 0 auto; padding: 16px 20px 40px; }
.controls { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; margin-bottom: 14px; }
.seg { display: inline-flex; border: 1px solid var(--border); border-radius: 8px; overflow: hidden;
  background: var(--surface); }
.seg button { border: 0; background: none; padding: 6px 12px; cursor: pointer; color: var(--ink-2); }
.seg button + button { border-left: 1px solid var(--border); }
.seg button[aria-pressed="true"] { background: var(--accent); color: #fff; }
.selected-time { margin-left: auto; font-weight: 600; }
.selected-time small { font-weight: 400; color: var(--muted); margin-left: 6px; }

.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 16px; margin-bottom: 16px; min-width: 0; }
.card-head { display: flex; flex-wrap: wrap; align-items: baseline; gap: 6px 12px; margin-bottom: 8px; }
.card-head h2 { font-size: 15px; margin: 0; }
.badge { display: inline-flex; align-items: center; gap: 6px; font-size: 12px; padding: 2px 8px;
  border-radius: 999px; border: 1px dashed var(--state-on); color: var(--ink-2); }
.card-head .right { margin-left: auto; display: flex; gap: 8px; align-items: center; }

.kpis { display: grid; grid-template-columns: repeat(auto-fit, minmax(170px, 1fr)); gap: 10px; margin: 6px 0 10px; }
.kpi { border: 1px solid var(--border); border-radius: 8px; padding: 10px 12px; }
.kpi .k { font-size: 12px; color: var(--ink-2); }
.kpi .v { font-size: 24px; font-weight: 650; margin-top: 2px; font-variant-numeric: tabular-nums; }
.kpi .v small { font-size: 13px; font-weight: 500; color: var(--ink-2); margin-left: 4px; }

.pair { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.pair > .card { margin-bottom: 16px; }
@media (max-width: 980px) { .pair { grid-template-columns: 1fr; gap: 0; } }

.frame-box { position: relative; background: #0b0b0b; border-radius: 8px; overflow: hidden;
  aspect-ratio: 4 / 3; display: grid; place-items: center; }
.frame-box img { width: 100%; height: 100%; object-fit: contain; display: block; }
.frame-box .empty { color: #c3c2b7; font-size: 13px; padding: 12px; text-align: center; }
.frame-nav { display: flex; gap: 6px; }
.frame-nav button { border: 1px solid var(--border); background: var(--surface); border-radius: 8px;
  padding: 4px 10px; cursor: pointer; }
.caption { font-size: 13px; color: var(--ink-2); margin-top: 8px; min-height: 20px; }
.flag { color: var(--critical); }
.chart { width: 100%; }
.chart-throughput { height: 340px; }
.chart-psd { height: 360px; }
.chart-weather { height: 900px; }
.readout { font-size: 13px; color: var(--ink-2); font-variant-numeric: tabular-nums; }
.note { font-size: 12px; color: var(--muted); margin-top: 6px; }
@media (max-width: 640px) {
  main { padding: 12px 12px 32px; } header.top { padding: 12px; }
  .kpis { grid-template-columns: 1fr 1fr; } .kpi .v { font-size: 20px; }
  .chart-throughput { height: 300px; } .chart-weather { height: 820px; }
  .selected-time { margin-left: 0; width: 100%; }
}