:root {
  --bg: #f4f5f7; --card: #fff; --fg: #14171c; --muted: #6b7280; --line: #e3e6ea;
  --solar: #f5a524; --load: #6366f1; --grid: #ef4444; --batt: #10b981; --soc: #0ea5e9;
}
@media (prefers-color-scheme: dark) {
  :root { --bg:#0f1216; --card:#171b21; --fg:#e6e9ee; --muted:#9aa4b2; --line:#242a33; }
}
* { box-sizing: border-box; }
body {
  margin: 0; background: var(--bg); color: var(--fg);
  font: 14px/1.5 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}
header {
  display: flex; align-items: center; justify-content: space-between;
  gap: 16px; flex-wrap: wrap; padding: 18px 20px 4px;
}
h1 { margin: 0; font-size: 20px; letter-spacing: -0.01em; }
h2 { margin: 0 0 12px; font-size: 13px; font-weight: 600; color: var(--muted);
     text-transform: uppercase; letter-spacing: .06em; }
.live { display: flex; gap: 14px; flex-wrap: wrap; font-variant-numeric: tabular-nums; }
.live b { font-weight: 600; }
.live .stale { color: var(--grid); }
.ranges { display: flex; gap: 6px; flex-wrap: wrap; align-items: center; padding: 12px 20px; }
.ranges button {
  border: 1px solid var(--line); background: var(--card); color: var(--fg);
  padding: 6px 13px; border-radius: 999px; cursor: pointer; font-size: 13px;
}
.ranges button.on { background: var(--fg); color: var(--bg); border-color: var(--fg); }
.ranges .custom { margin-left: auto; display: flex; gap: 6px; align-items: center; }
.ranges input {
  border: 1px solid var(--line); background: var(--card); color: var(--fg);
  padding: 5px 8px; border-radius: 8px; font-size: 13px;
}
.kpis {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 10px; padding: 6px 20px 14px;
}
.kpi { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 12px 14px; }
.kpi .l { color: var(--muted); font-size: 12px; }
.kpi .v { font-size: 22px; font-weight: 650; letter-spacing: -0.02em;
          font-variant-numeric: tabular-nums; margin-top: 2px; }
.card { background: var(--card); border: 1px solid var(--line);
        border-radius: 14px; padding: 16px; margin: 0 20px 16px; }
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 0; }
.grid2 .card { margin-right: 0; }
.grid2 .card + .card { margin-left: 10px; margin-right: 20px; }
@media (max-width: 780px) {
  .grid2 { grid-template-columns: 1fr; }
  .grid2 .card + .card { margin-left: 20px; }
}
.chartbox { position: relative; height: 300px; }
.grid2 .chartbox { height: 230px; }
footer { color: var(--muted); font-size: 12px; padding: 4px 20px 30px; }