:root {
  --bg: #0f1115;
  --panel: #171a21;
  --panel-2: #1d2129;
  --border: #262b35;
  --text: #e6e8ee;
  --muted: #8a93a6;
  --co2: #4cc9f0;
  --temp: #f6a26b;
  --hum: #7be495;
  --pres: #c792ea;
  --batt: #ffd166;
  --radio: #ef476f;
  --ok: #25c685;
  --bad: #ef476f;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Inter, sans-serif;
  font-size: 14px;
  line-height: 1.4;
}

header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding: 18px 24px;
  border-bottom: 1px solid var(--border);
  background: var(--panel);
}
header h1 { margin: 0; font-size: 20px; font-weight: 600; }
header .muted { color: var(--muted); font-weight: 400; }
.status { color: var(--muted); font-size: 13px; display: flex; gap: 8px; align-items: center; }
.status .sep { opacity: .4; }
.dot { width: 9px; height: 9px; border-radius: 50%; display: inline-block; }
.dot.on { background: var(--ok); box-shadow: 0 0 8px var(--ok); }
.dot.off { background: var(--bad); }

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 14px;
  padding: 20px 24px;
}
.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 16px 18px;
  border-left: 4px solid var(--border);
}
.card.co2 { border-left-color: var(--co2); }
.card.temp { border-left-color: var(--temp); }
.card.hum { border-left-color: var(--hum); }
.card.pres { border-left-color: var(--pres); }
.card.batt { border-left-color: var(--batt); }
.card.radio { border-left-color: var(--radio); }

.card .label { color: var(--muted); font-size: 12px; text-transform: uppercase; letter-spacing: .06em; }
.card .value { font-size: 32px; font-weight: 600; margin-top: 6px; }
.card .value.small { font-size: 22px; }
.card .unit { font-size: 14px; color: var(--muted); margin-left: 6px; font-weight: 400; }
.card .sub { color: var(--muted); font-size: 12px; margin-top: 4px; min-height: 16px; }

.meta {
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
  padding: 0 24px 14px;
  color: var(--muted);
  font-size: 12px;
}
.meta code {
  background: var(--panel-2);
  padding: 2px 6px;
  border-radius: 4px;
  color: var(--text);
}

.period-bar {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 0 24px 14px;
  flex-wrap: wrap;
}
.tabs {
  display: inline-flex;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 3px;
  gap: 2px;
}
.tab {
  background: transparent;
  border: 0;
  color: var(--muted);
  padding: 7px 14px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 13px;
  font-weight: 500;
  transition: background .15s, color .15s;
}
.tab:hover { color: var(--text); }
.tab.active {
  background: var(--panel-2);
  color: var(--text);
  box-shadow: inset 0 0 0 1px var(--border);
}
.period-stats {
  color: var(--muted);
  font-size: 12px;
  font-variant-numeric: tabular-nums;
}

.table-scroll { max-height: 480px; overflow-y: auto; border-radius: 10px; }

.charts {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(360px, 1fr));
  gap: 14px;
  padding: 0 24px 20px;
}
.chart-box {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px;
  height: 240px;
}

.table-box {
  padding: 0 24px 32px;
}
.table-box h2 {
  font-size: 14px;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--muted);
  margin: 0 0 10px;
}
table {
  width: 100%;
  border-collapse: collapse;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
}
th, td {
  padding: 8px 12px;
  text-align: right;
  border-bottom: 1px solid var(--border);
  font-variant-numeric: tabular-nums;
}
th:first-child, td:first-child, th:nth-child(2), td:nth-child(2) { text-align: left; }
th { color: var(--muted); font-weight: 500; font-size: 12px; text-transform: uppercase; background: var(--panel-2); }
tr:last-child td { border-bottom: none; }
tr.flash { animation: flash 1s ease; }
@keyframes flash {
  0% { background: rgba(76,201,240,.18); }
  100% { background: transparent; }
}

.flag-bad { color: var(--bad); font-weight: 600; }