@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@500;600;700&family=JetBrains+Mono:wght@400;500;600&family=Inter:wght@400;500;600&display=swap');

:root {
  --bg: #0a0e17;
  --bg-grid: rgba(255,255,255,0.025);
  --panel: #10141f;
  --panel-2: #171d2c;
  --panel-3: #1f2637;
  --border: #232b40;
  --text: #eef1fb;
  --muted: #8792ac;
  --muted-2: #5c657f;
  --accent: #5b8cff;
  --accent-dim: rgba(91,140,255,0.14);
  --energy: #ff9d4d;
  --energy-dim: rgba(255,157,77,0.14);
  --ok: #34d399;
  --ok-dim: rgba(52,211,153,0.14);
  --danger: #fb7185;
  --danger-dim: rgba(251,113,133,0.14);
  --radius: 12px;
  --radius-sm: 8px;
  --font-display: 'Space Grotesk', 'Inter', -apple-system, sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, monospace;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: var(--font-body);
  background:
    linear-gradient(var(--bg-grid) 1px, transparent 1px) 0 0 / 28px 28px,
    linear-gradient(90deg, var(--bg-grid) 1px, transparent 1px) 0 0 / 28px 28px,
    var(--bg);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-decoration: none; }
h1, h2, h3 { font-family: var(--font-display); letter-spacing: -0.01em; }

:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

@media (prefers-reduced-motion: reduce) {
  * { animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; }
}

.center-screen {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 30px;
  width: 100%;
  max-width: 400px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.35);
}

.card h1 { font-size: 1.4rem; margin-top: 0; }
.card .subtitle { color: var(--muted); font-size: 0.9rem; margin-bottom: 22px; }

label { display: block; font-size: 0.8rem; color: var(--muted); margin: 14px 0 6px; font-weight: 500; }
input, select, textarea {
  width: 100%;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--panel-2);
  color: var(--text);
  font-size: 0.95rem;
  font-family: var(--font-body);
  transition: border-color 0.15s;
}
input:focus, select:focus, textarea:focus { border-color: var(--accent); }
textarea { resize: vertical; font-family: var(--font-mono); font-size: 0.85rem; }

button {
  cursor: pointer;
  border: none;
  border-radius: var(--radius-sm);
  padding: 10px 18px;
  font-size: 0.9rem;
  font-weight: 600;
  font-family: var(--font-body);
  background: var(--accent);
  color: #051022;
  margin-top: 16px;
  transition: filter 0.15s, transform 0.05s;
}
button:hover { filter: brightness(1.1); }
button:active { transform: translateY(1px); }
button.secondary { background: var(--panel-3); border: 1px solid var(--border); color: var(--text); }
button.danger { background: var(--danger); color: #2a0a10; }
button.small { padding: 6px 12px; font-size: 0.78rem; margin-top: 0; }
button.chip {
  background: var(--panel-2); border: 1px solid var(--border); color: var(--muted);
  padding: 7px 14px; font-size: 0.8rem; font-weight: 500; margin: 0; border-radius: 20px;
}
button.chip.active { background: var(--accent-dim); border-color: var(--accent); color: var(--accent); }

.error-msg { color: var(--danger); font-size: 0.85rem; margin-top: 10px; min-height: 1em; }
.hint { color: var(--muted); font-size: 0.8rem; }

/* ---------- Layout ---------- */
.app-shell { display: flex; min-height: 100vh; }
.sidebar {
  width: 224px;
  background: var(--panel);
  border-right: 1px solid var(--border);
  padding: 22px 14px;
  flex-shrink: 0;
}
.sidebar .brand { font-family: var(--font-display); font-weight: 700; font-size: 1.05rem; margin-bottom: 26px; padding: 0 8px; display: flex; align-items: center; gap: 8px; }
.sidebar .brand .dot { width: 9px; height: 9px; border-radius: 50%; background: var(--ok); box-shadow: 0 0 8px var(--ok); animation: pulse 2s infinite; flex-shrink: 0; }
.sidebar .brand small { display: block; color: var(--muted); font-weight: 400; font-size: 0.72rem; font-family: var(--font-body); }
.sidebar nav a {
  display: block;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  color: var(--muted);
  font-size: 0.88rem;
  font-weight: 500;
  margin-bottom: 3px;
}
.sidebar nav a.active, .sidebar nav a:hover { background: var(--panel-2); color: var(--text); }
.sidebar .user-box { margin-top: 26px; padding-top: 16px; border-top: 1px solid var(--border); font-size: 0.8rem; color: var(--muted); }

.main { flex: 1; padding: 30px 34px; max-width: 1240px; }
.main h2 { margin-top: 0; font-size: 1.35rem; }
.topbar { display: flex; justify-content: space-between; align-items: center; margin-bottom: 20px; gap: 12px; flex-wrap: wrap; }

.live-status { display: flex; align-items: center; gap: 6px; font-size: 0.8rem; color: var(--muted); font-family: var(--font-mono); }
.live-status .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--muted-2); }
.live-status.on .dot { background: var(--ok); box-shadow: 0 0 6px var(--ok); animation: pulse 2s infinite; }
@keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: 0.4; } }

.toolbar { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 18px; align-items: center; justify-content: space-between; }
.chip-row { display: flex; gap: 6px; flex-wrap: wrap; }
.view-toggle { display: flex; gap: 4px; background: var(--panel-2); border: 1px solid var(--border); border-radius: 20px; padding: 3px; }
.view-toggle button { margin: 0; padding: 5px 12px; border-radius: 16px; background: transparent; color: var(--muted); font-size: 0.75rem; }
.view-toggle button.active { background: var(--accent-dim); color: var(--accent); }

.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 14px; }
.grid.compact { grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 10px; }

.location-section { margin-bottom: 26px; }
.location-heading {
  font-family: var(--font-display); font-size: 0.95rem; font-weight: 600; color: var(--muted);
  text-transform: uppercase; letter-spacing: 0.05em; margin: 0 0 10px; padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
}

.entity-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  transition: border-color 0.15s;
}
.entity-card:hover { border-color: #2e3a56; }
.entity-card .top-row { display: flex; justify-content: space-between; align-items: flex-start; gap: 8px; }
.entity-card .icon-badge {
  width: 34px; height: 34px; border-radius: 9px; display: flex; align-items: center; justify-content: center;
  background: var(--accent-dim); color: var(--accent); flex-shrink: 0;
}
.entity-card .icon-badge svg { width: 18px; height: 18px; }
.entity-card.type-energy_meter .icon-badge { background: var(--energy-dim); color: var(--energy); }
.entity-card .type-badge { font-size: 0.65rem; color: var(--muted-2); text-transform: uppercase; letter-spacing: 0.05em; font-weight: 600; }
.entity-card .name { font-weight: 600; margin: 2px 0 1px; font-size: 0.95rem; }
.entity-card .location { color: var(--muted); font-size: 0.78rem; }
.entity-card .value {
  font-family: var(--font-mono); font-variant-numeric: tabular-nums;
  font-size: 1.65rem; font-weight: 600; margin: 14px 0 2px; letter-spacing: -0.01em;
}
.entity-card .value .unit { font-size: 0.9rem; color: var(--muted); font-weight: 400; margin-left: 3px; }
.entity-card .updated { color: var(--muted-2); font-size: 0.7rem; font-family: var(--font-mono); }
.entity-card .sparkline { width: 100%; height: 34px; margin-top: 8px; display: block; }
.entity-card .sub-metric { font-size: 0.72rem; color: var(--muted); margin-top: 6px; font-family: var(--font-mono); }

.toggle {
  width: 46px; height: 25px; border-radius: 20px; background: var(--panel-3);
  border: 1px solid var(--border); position: relative; cursor: pointer; margin-top: 12px;
  transition: background 0.15s;
}
.toggle.on { background: var(--ok); border-color: var(--ok); }
.toggle .knob {
  width: 19px; height: 19px; border-radius: 50%; background: white;
  position: absolute; top: 2px; left: 2px; transition: left 0.15s; box-shadow: 0 1px 3px rgba(0,0,0,0.3);
}
.toggle.on .knob { left: 23px; }

table { width: 100%; border-collapse: collapse; font-size: 0.88rem; }
th, td { text-align: left; padding: 10px 8px; border-bottom: 1px solid var(--border); }
td.mono, th.mono { font-family: var(--font-mono); font-size: 0.82rem; }
th { color: var(--muted); font-weight: 600; font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.03em; }

.badge { display: inline-block; padding: 2px 9px; border-radius: 20px; font-size: 0.72rem; font-weight: 600; font-family: var(--font-mono); }
.badge.online { background: var(--ok-dim); color: var(--ok); }
.badge.offline { background: var(--danger-dim); color: var(--danger); }

.panel-box {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 18px;
}
.panel-box h3 { margin-top: 0; font-size: 1.05rem; }

.form-row { display: flex; gap: 12px; flex-wrap: wrap; }
.form-row > div { flex: 1; min-width: 160px; }

.tabs { display: flex; gap: 2px; margin-bottom: 20px; border-bottom: 1px solid var(--border); overflow-x: auto; }
.tabs button {
  background: transparent; color: var(--muted); border-radius: 0; margin: 0; white-space: nowrap;
  padding: 10px 16px; border-bottom: 2px solid transparent; font-size: 0.85rem;
}
.tabs button.active { color: var(--text); border-bottom-color: var(--accent); }

.chart-wrap { background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); padding: 16px; margin-top: 16px; }
.chart-toolbar { display: flex; justify-content: flex-end; gap: 6px; margin-bottom: 4px; }

.modal-backdrop {
  position: fixed; inset: 0; background: rgba(4,6,12,0.65); backdrop-filter: blur(2px);
  display: flex; align-items: center; justify-content: center; padding: 20px; z-index: 50;
}
.modal { background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); padding: 24px; width: 100%; max-width: 500px; max-height: 90vh; overflow-y: auto; box-shadow: 0 20px 60px rgba(0,0,0,0.5); }
.modal h3 { margin-top: 0; }
.modal-actions { display: flex; justify-content: flex-end; gap: 10px; }

.empty-state { color: var(--muted); text-align: center; padding: 50px 20px; }
.empty-state .icon { opacity: 0.35; margin-bottom: 10px; }

/* ---------- Responsive ---------- */
@media (max-width: 780px) {
  .app-shell { flex-direction: column; }
  .sidebar {
    width: 100%; border-right: none; border-bottom: 1px solid var(--border);
    padding: 14px 16px; display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 10px;
  }
  .sidebar .brand { margin-bottom: 0; }
  .sidebar nav { display: flex; gap: 4px; }
  .sidebar nav a { padding: 8px 10px; margin-bottom: 0; }
  .sidebar .user-box { margin-top: 0; padding-top: 0; border-top: none; display: flex; align-items: center; gap: 10px; }
  .main { padding: 18px 16px; }
  .grid, .grid.compact { grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 10px; }
  .topbar { flex-direction: column; align-items: flex-start; }
}