:root {
  --bg: #0a0f0a;
  --surface: #0d120d;
  --border: #1a2a1a;
  --accent: #39d353;
  --text: #e5e7eb;
  --muted: #6b7280;
  --color-lux: #fbbf24;
  --color-temp: #f87171;
  --color-humidity: #60a5fa;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: ui-monospace, 'Cascadia Code', 'Source Code Pro', monospace;
  font-size: 14px;
  min-height: 100vh;
}

/* ── Layout ─────────────────────────────── */
.page { max-width: 1200px; margin: 0 auto; padding: 20px 16px; }

/* ── Header ─────────────────────────────── */
.header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 20px;
  flex-wrap: wrap;
  gap: 10px;
}
.header-left { display: flex; align-items: baseline; gap: 12px; }
.header-title { color: var(--text); font-size: 16px; font-weight: 600; letter-spacing: 0.05em; }
.header-updated { color: var(--muted); font-size: 11px; }
.header-right { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }

/* ── Status pill ─────────────────────────── */
.status-pill {
  padding: 3px 10px;
  border-radius: 4px;
  font-size: 11px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--muted);
}
.status-pill.running { border-color: #1a3a1a; background: #0d1f0d; color: var(--accent); }

/* ── Time range buttons ──────────────────── */
.range-buttons { display: flex; gap: 4px; }
.range-btn {
  background: var(--surface);
  color: var(--muted);
  border: 1px solid var(--border);
  padding: 3px 10px;
  border-radius: 3px;
  font-size: 11px;
  cursor: pointer;
  font-family: inherit;
}
.range-btn.active { background: var(--border); color: var(--accent); }
.range-btn:hover:not(.active) { border-color: var(--accent); color: var(--text); }

/* ── Stat cards ──────────────────────────── */
.stat-cards {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 10px;
  margin-bottom: 20px;
}
.stat-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 14px 12px;
  text-align: center;
}
.stat-value { color: var(--accent); font-size: clamp(16px, 4vw, 24px); font-weight: 700; line-height: 1.1; }
.stat-value.secondary { color: var(--text); font-size: 20px; }
.stat-sub { color: var(--text); font-size: 14px; margin-top: 2px; }
.stat-label { color: var(--muted); font-size: 10px; margin-top: 6px; letter-spacing: 0.08em; text-transform: uppercase; }

/* ── Chart containers ────────────────────── */
.chart-full { margin-bottom: 12px; }
.chart-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-bottom: 12px;
}
.chart-box {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 14px;
  overflow: hidden;
}
.chart-title { color: var(--text); font-size: 12px; margin-bottom: 4px; }

/* ── Error banner ────────────────────────── */
.error-banner {
  display: none;
  background: #1a0a0a;
  border: 1px solid #3a1a1a;
  color: #f87171;
  padding: 8px 14px;
  border-radius: 4px;
  font-size: 12px;
  margin-bottom: 14px;
}
.error-banner.visible { display: block; }

/* ── Footer ──────────────────────────────── */
.footer {
  border-top: 1px solid var(--border);
  padding-top: 14px;
  margin-top: 8px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--muted);
  font-size: 11px;
  flex-wrap: wrap;
  gap: 8px;
}
.footer a { color: var(--accent); text-decoration: none; }
.footer a:hover { text-decoration: underline; }

/* ── Responsive ──────────────────────────── */
@media (max-width: 900px) {
  .stat-cards { grid-template-columns: repeat(2, 1fr); }
  .stat-cards .stat-card:last-child { grid-column: 1 / -1; }
}
@media (max-width: 640px) {
  .stat-cards { grid-template-columns: 1fr; }
  .stat-cards .stat-card:last-child { grid-column: auto; }
  .chart-grid { grid-template-columns: 1fr; }
  .header { flex-direction: column; align-items: flex-start; }
}