:root {
  --bg: #f3f5f9;
  --card: #ffffff;
  --card-2: #f7f9fc;
  --border: #e2e7f0;
  --text: #1f2430;
  --muted: #6b7486;
  --green: #16a34a;
  --green-bg: #eafaf0;
  --green-border: #b7ecd0;
  --amber: #d97706;
  --amber-bg: #fef3e2;
  --amber-border: #f5d7a6;
  --gray: #8a93a5;
  --accent: #2563eb;
  --red: #dc2626;
  --red-bg: #fef2f2;
  --red-border: #fecaca;
  --shadow: 0 1px 2px rgba(20, 30, 50, 0.06), 0 4px 14px rgba(20, 30, 50, 0.05);
}

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

body {
  background: var(--bg);
  color: var(--text);
  font-family: "Segoe UI", system-ui, -apple-system, Roboto, "Helvetica Neue", sans-serif;
  font-size: 15px;
  line-height: 1.45;
  -webkit-font-smoothing: antialiased;
}

/* ---------- Layout ---------- */
.container { max-width: 1200px; margin: 0 auto; padding: 20px 24px 48px; }

/* ---------- Plugs ---------- */
.plugs { display: block; }

.area-group { margin-bottom: 26px; }

.area-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 10px;
}

.plugs-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 16px;
}

.plug-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 16px 18px 18px;
  box-shadow: var(--shadow);
  transition: border-color 0.25s, box-shadow 0.25s, background 0.25s;
}

/* A plug "in use" is drawing power (the first thing you see). */
.plug-card.using {
  border-color: var(--red-border);
  background: var(--red-bg);
  box-shadow: 0 0 0 1px var(--red-border), 0 8px 24px rgba(220, 38, 38, 0.12);
}

.plug-card.noread {
  border-color: var(--amber-border);
  background: var(--amber-bg);
}

/* Hero status: the first thing you see */
.status-hero {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
}

.status-led {
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: #c9cfda;
  flex: none;
  position: relative;
}

.plug-card.using .status-led { background: var(--red); box-shadow: 0 0 0 6px rgba(220, 38, 38, 0.18); }
.plug-card.using .status-led::after {
  content: "";
  position: absolute;
  inset: -6px;
  border-radius: 50%;
  animation: pulse 2s ease-out infinite;
}

.plug-card.noread .status-led { background: var(--amber); box-shadow: 0 0 0 6px rgba(217, 119, 6, 0.18); }

@keyframes pulse {
  0% { box-shadow: 0 0 0 0 rgba(220, 38, 38, 0.35); }
  70% { box-shadow: 0 0 0 10px rgba(220, 38, 38, 0); }
  100% { box-shadow: 0 0 0 0 rgba(220, 38, 38, 0); }
}

.status-label {
  font-size: 19px;
  font-weight: 800;
  letter-spacing: 0.2px;
}

.plug-card.using .status-label { color: var(--red); }
.plug-card.noread .status-label { color: var(--amber); }
.plug-card.idle .status-label { color: var(--gray); }

.plug-name { font-size: 14.5px; font-weight: 650; color: var(--text); }

.badges { display: flex; gap: 6px; margin: 8px 0 14px; flex-wrap: wrap; }

.badge {
  font-size: 11.5px;
  font-weight: 600;
  padding: 3px 9px;
  border-radius: 999px;
  background: var(--card-2);
  border: 1px solid var(--border);
  color: var(--muted);
}

.badge.encendido { color: var(--green); background: var(--green-bg); border-color: var(--green-border); }
.badge.apagado { color: var(--muted); background: var(--card-2); border-color: var(--border); }
.badge.encendido { color: var(--green); background: var(--green-bg); border-color: var(--green-border); }

.stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 8px;
}

.stat {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 8px 10px;
}

.plug-card.using .stat, .plug-card.noread .stat { background: rgba(255, 255, 255, 0.75); }

.stat-label {
  display: block;
  font-size: 10.5px;
  text-transform: uppercase;
  letter-spacing: 0.6px;
  color: var(--muted);
  margin-bottom: 1px;
}

.stat-value { font-size: 18px; font-weight: 700; font-variant-numeric: tabular-nums; }
.stat-value .unit { font-size: 11.5px; font-weight: 500; color: var(--muted); margin-left: 2px; }
.stat-sub { font-size: 11px; color: var(--muted); }

.plug-card.placeholder .status-label { color: var(--muted); font-weight: 600; }

/* ---------- Panels (collapsible) ---------- */
.panel {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  margin-top: 18px;
  box-shadow: var(--shadow);
  overflow: hidden;
}

.panel summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  cursor: pointer;
  list-style: none;
}

.panel summary::-webkit-details-marker { display: none; }

.panel-title { font-size: 15.5px; font-weight: 700; }
.panel-chev { color: var(--muted); transition: transform 0.2s; }
.panel[open] .panel-chev { transform: rotate(180deg); }

.panel .panel-body, .controls, #chart, .chart-sub, .hist { padding: 0 20px; }
.panel .controls { padding-top: 4px; }
#chart { height: 360px; margin: 12px 0 4px; }
.chart-sub { color: var(--muted); font-size: 12px; padding-bottom: 14px; }

.controls {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.ctrl-group { display: flex; gap: 4px; background: var(--card-2); border: 1px solid var(--border); border-radius: 10px; padding: 4px; }

.btn {
  border: none;
  background: transparent;
  color: var(--muted);
  font-size: 12.5px;
  font-weight: 600;
  padding: 6px 11px;
  border-radius: 7px;
  cursor: pointer;
  font-family: inherit;
  transition: background 0.15s, color 0.15s;
}

.btn:hover { color: var(--text); background: #edf1f7; }
.btn.active { background: var(--accent); color: #fff; }
.btn.active:hover { background: var(--accent); }

/* ---------- History tables ---------- */
.hist { padding-bottom: 20px; }
.hist h3 { font-size: 13px; text-transform: uppercase; letter-spacing: 0.6px; color: var(--muted); margin: 14px 0 8px; }

.table-wrap { overflow-x: auto; border: 1px solid var(--border); border-radius: 10px; }

table { width: 100%; border-collapse: collapse; font-size: 13px; min-width: 480px; }

thead th {
  text-align: left;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--muted);
  background: var(--card-2);
  padding: 8px 12px;
  border-bottom: 1px solid var(--border);
}

tbody td { padding: 8px 12px; border-bottom: 1px solid var(--border); }
tbody tr:last-child td { border-bottom: none; }
td.num, th.num { text-align: right; font-variant-numeric: tabular-nums; }
td.on-cell { color: var(--green); font-weight: 600; }

.hist-empty { margin-top: 12px; color: var(--muted); font-size: 13px; }

/* ---------- Toast ---------- */
.toast {
  position: fixed;
  bottom: 22px;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: #20242f;
  color: #fff;
  padding: 11px 18px;
  border-radius: 10px;
  font-size: 13.5px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s, transform 0.2s;
  z-index: 50;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
}

.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }
.toast.err { background: var(--red); }

/* ---------- Responsive ---------- */
@media (max-width: 640px) {
  .container { padding: 16px 12px 36px; }
  .plugs-grid { grid-template-columns: 1fr; }
  .status-label { font-size: 17px; }
}