:root {
  color-scheme: dark;
  --bg: #0b1020;
  --panel: #111827;
  --text: #e5e7eb;
  --muted: #9ca3af;
  --accent: #22c55e;
  --warn: #f97316;
  --bad: #ef4444;
  --border: #1f2937;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
}

.app {
  max-width: 1100px;
  margin: 0 auto;
  padding: 16px;
}

.header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 8px 0 16px;
}

.header h1 {
  margin: 0;
  font-size: 24px;
}

.sub { margin: 4px 0 0; color: var(--muted); font-size: 14px; }

.status {
  padding: 6px 12px;
  border-radius: 999px;
  font-weight: 600;
}
.status.ok { background: #16a34a; }
.status.warn { background: var(--warn); }
.status.bad { background: var(--bad); }

.tabs {
  display: flex;
  gap: 8px;
  margin-bottom: 16px;
}

.tab {
  background: var(--panel);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 8px 12px;
  border-radius: 10px;
  font-size: 14px;
}

.tab.active {
  border-color: var(--accent);
  color: var(--accent);
}

.page { display: none; }
.page.active { display: block; }

.alerts {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 12px;
  margin-bottom: 16px;
}

.alerts h2 { margin: 0 0 8px; font-size: 16px; }

.alerts-list { margin: 0; padding-left: 16px; }

.muted { color: var(--muted); }

.kpi-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 10px;
  margin-bottom: 16px;
}

.tile {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 12px;
  min-height: 90px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.label { color: var(--muted); font-size: 13px; }
.value { font-size: 22px; font-weight: 700; }
.unit { color: var(--muted); font-size: 12px; }

.inverters h2 { margin: 8px 0; font-size: 16px; }
.inverter-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 10px;
}

.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 12px;
}

.card h3 { margin: 0 0 8px; font-size: 15px; }

.row {
  display: flex;
  justify-content: space-between;
  padding: 4px 0;
  color: var(--muted);
}

.charts {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin-top: 16px;
}

.chart-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 12px;
}

.chart-card h2 { margin: 0 0 8px; font-size: 16px; }

.stats-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 12px;
}

.panel h2 { margin: 0 0 8px; font-size: 16px; }

.stat-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

.stat-table th,
.stat-table td {
  text-align: left;
  padding: 6px 4px;
  border-bottom: 1px solid var(--border);
}

.highlight {
  font-size: 16px;
  font-weight: 600;
}

@media (min-width: 900px) {
  .charts { grid-template-columns: 1fr 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
}

canvas { width: 100%; }