/* ── Dark Theme ─────────────────────────────────────── */
* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  background: #0a0a0a;
  color: #f5f5f5;
  min-height: 100vh;
  margin-inline: 1rem;
  margin-block: 2rem;
}

/* ── Cards ──────────────────────────────────────────── */
.card {
  background: #1a1a1a;
  border: 1px solid #2a2a2a;
  border-radius: 0.75rem;
  padding: 1rem 1.25rem;
}

/* ── Header ─────────────────────────────────────────── */
.header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.5rem;
}
.header h1 {
  font-size: 1.5rem;
  font-weight: 700;
  color: #f5f5f5;
}
.header .sub {
  font-size: 0.8rem;
  color: #6b7280;
  margin-top: 0.15rem;
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.45rem 1rem;
  border-radius: 0.5rem;
  font-size: 0.875rem;
  font-weight: 500;
  border: none;
  cursor: pointer;
  transition: background 0.15s;
  background: #f97316;
  color: #fff;
}
.btn:hover { background: #ea580c; }
.btn:disabled { opacity: 0.4; pointer-events: none; }
.btn .spinner { animation: spin 0.8s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

/* ── Time range pills ───────────────────────────────── */
.pill-group {
  display: flex;
  gap: 0.4rem;
  margin-bottom: 0.75rem;
  flex-wrap: wrap;
}
.pill {
  padding: 0.3rem 0.75rem;
  border-radius: 9999px;
  border: 1px solid #333;
  font-size: 0.78rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.12s;
  background: transparent;
  color: #9ca3af;
}
.pill:hover {
  border-color: #f97316;
  color: #f5f5f5;
}
.pill.active {
  background: #f97316;
  border-color: #f97316;
  color: #fff;
}

/* ── Chart ──────────────────────────────────────────── */
.chart-card {
  background: #1a1a1a;
  border: 1px solid #2a2a2a;
  border-radius: 0.75rem;
  padding: 1rem 1.25rem;
  margin-bottom: 1.25rem;
}
.chart-card h2 {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: #6b7280;
  margin-bottom: 0.75rem;
}
.chart-wrap {
  position: relative;
  width: 100%;
  min-height: 240px;
}
.chart-wrap canvas {
  display: block;
  width: 100%;
  max-height: 320px;
}

/* ── Sensor Cards (4 side by side) ──────────────────── */
.sensor-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.75rem;
  margin-bottom: 1.25rem;
}
.sensor-card {
  background: #1a1a1a;
  border: 1px solid #2a2a2a;
  border-radius: 0.75rem;
  padding: 1rem;
  text-align: center;
  transition: border-color 0.15s;
}
.sensor-card:hover {
  border-color: #f97316;
}
.sensor-card .label {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: #6b7280;
  margin-bottom: 0.25rem;
}
.sensor-card .value {
  font-size: 1.5rem;
  font-weight: 700;
  line-height: 1.2;
}
.sensor-card .color-bar {
  height: 3px;
  border-radius: 2px;
  margin-top: 0.5rem;
  width: 40%;
  margin-left: auto;
  margin-right: auto;
}


@media (min-width: 768px) {
  .chart-wrap canvas { max-height: 400px; }
}

/* ── Section Title ──────────────────────────────────── */
.sec-title {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: #6b7280;
  margin-bottom: 0.75rem;
}

/* ── Reading Rows ───────────────────────────────────── */
.reading-list {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}
.reading-row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.5rem 0.75rem;
  border-radius: 0.5rem;
  background: #141414;
  border: 1px solid #222;
  transition: border-color 0.1s;
  font-size: 0.8rem;
}
.reading-row:hover {
  border-color: #f97316;
}
.reading-row .rtime {
  color: #9ca3af;
  font-weight: 600;
  min-width: 6rem;
  flex-shrink: 0;
}
.reading-row .rfields {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 1rem;
}
.reading-row .rfield {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  color: #d1d5db;
}
.reading-row .rfield .dot {
  display: inline-block;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  flex-shrink: 0;
}
.reading-row .rfield .val {
  font-weight: 600;
  color: #f5f5f5;
}