:root {
  --bg: #42484e;
  --panel: #ffffff;
  --panel-alt: #f1f3f5;
  --border: #e5e7eb;
  --text: #111827;
  --muted: #6b7280;
  --accent: #2563eb;
  --success: #16a34a; /* RUN */
  --stop: #6b7280;    /* STOP */
  --fault: #dc2626;   /* FAULT */
  --shadow: 0 2px 12px rgba(0,0,0,0.06), 0 8px 24px rgba(0,0,0,0.05);
  --on-dark: #e8eaed;
  --border-dark: rgba(255,255,255,0.08);
  --border-light: #d4d6da;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: 'Inter', system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, 'Apple Color Emoji', 'Segoe UI Emoji';
  color: var(--text);
  background: var(--bg);
}

.app-shell {
  display: grid;
  grid-template-columns: 260px 1fr;
  grid-template-rows: 64px 1fr;
  grid-template-areas:
    "topbar topbar"
    "sidebar main";
  min-height: 100vh;
}

/* Topbar */
.topbar {
  grid-area: topbar;
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
  background: var(--bg);
  border-bottom: 1px solid var(--border-dark);
}
.brand { display: flex; align-items: center; gap: 10px; }
.brand .logo { display: grid; place-items: center; width: 36px; height: 36px; background: linear-gradient(180deg,#eff6ff,#dbeafe); border-radius: 10px; }
.brand .title { font-weight: 600; letter-spacing: 0.2px; color: var(--on-dark); }

.topbar-actions { display: flex; align-items: center; gap: 8px; }
.icon-button {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px; height: 36px;
  border-radius: 10px;
  border: 1px solid var(--border-dark);
  background: rgba(255,255,255,0.06);
  cursor: pointer;
}
.icon-button:hover { background: rgba(255,255,255,0.12); }
.icon-button svg path { stroke: var(--on-dark); }
.badge {
  position: absolute; top: -6px; right: -6px;
  background: var(--accent); color: #fff; border-radius: 999px;
  font-size: 11px; padding: 2px 6px; line-height: 1;
  border: 2px solid #fff;
}

.profile { position: relative; }
.profile-button {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 10px; border-radius: 10px; border: 1px solid var(--border-dark); background: rgba(255,255,255,0.06); color: var(--on-dark); cursor: pointer;
}
.avatar { width: 24px; height: 24px; border-radius: 999px; display: grid; place-items: center; background: #e5edff; color: #2743f7; font-weight: 700; font-size: 12px; }
.dropdown {
  position: absolute; top: calc(100% + 6px); right: 0; min-width: 160px; background: #fff; border: 1px solid var(--border); border-radius: 12px; box-shadow: var(--shadow); padding: 6px; display: none;
}
.dropdown.open { display: block; }
.dropdown-item { width: 100%; display: block; text-align: left; padding: 10px 12px; border-radius: 8px; background: transparent; border: none; cursor: pointer; }
.dropdown-item:hover { background: var(--panel-alt); }

/* Sidebar */
.sidebar {
  grid-area: sidebar;
  padding: 16px 12px;
  border-right: 1px solid var(--border-dark);
  background: var(--bg);
}
.nav { display: flex; flex-direction: column; gap: 6px; }
.nav-item { display: flex; align-items: center; gap: 10px; padding: 10px 12px; border-radius: 10px; color: #e5e7eb; text-decoration: none; border: 1px solid transparent; }
.nav-item:hover { background: rgba(255,255,255,0.06); border-color: var(--border-dark); }
.nav-item.active { background: rgba(255,255,255,0.12); border-color: var(--border-dark); }
.nav-label { font-weight: 500; }
.admin-only { display: none; }
.nav .nav-item svg path { fill: #cbd5e1; }
.nav .nav-item:hover svg path,
.nav .nav-item.active svg path { fill: #ffffff; }

/* Main content */
.main { grid-area: main; padding: 18px; }
.dashboard-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 16px;
}

/* History page */
.history-page { display: block; }
.history-card { grid-column: 1 / -1; }
.history-controls {
  display: flex; flex-wrap: wrap; gap: 10px; align-items: center; padding: 12px 14px; border-bottom: 1px solid var(--border-light); background: var(--panel-alt);
}
.history-controls label { font-size: 12px; color: var(--muted); }
.history-controls select, .history-controls input { padding: 6px 8px; border: 1px solid var(--border-light); border-radius: 8px; background: #fff; }
.history-controls .btn { padding: 8px 12px; border-radius: 8px; border: 1px solid var(--border-light); background: #fff; cursor: pointer; }
.history-controls .btn:hover { background: #f7f7f7; }
.history-chart { padding: 14px; }

/* KPI summary cards */
.kpi-card { grid-column: span 4; display: grid; align-items: center; }
.kpi-content { padding: 14px; }
.kpi-label { color: var(--muted); font-size: 12px; text-transform: uppercase; letter-spacing: 0.6px; margin-bottom: 6px; }
.kpi-value { font-size: 22px; font-weight: 700; }

@media (max-width: 1280px) {
  .kpi-card { grid-column: span 4; }
}
@media (max-width: 900px) {
  .kpi-card { grid-column: span 12; }
}

.card { background: #e2e3e5; border: 1px solid var(--border-light); border-radius: 14px; box-shadow: var(--shadow); overflow: hidden; }
.card-header { display: flex; align-items: center; justify-content: space-between; padding: 12px 14px; border-bottom: 1px solid var(--border-light); background: #656f78; color: #fff; border-top-left-radius: 14px; border-top-right-radius: 14px; }
.card h3 { margin: 0; font-size: 15px; }
.status-pill { padding: 4px 10px; border-radius: 999px; font-weight: 600; font-size: 12px; background: var(--stop); color: #fff; }
.status-pill.run { background: var(--success); }
.status-pill.fault { background: var(--fault); }

/* Pump card */
.pump-card { grid-column: span 6; }
.pump-content { display: grid; grid-template-columns: 1fr 1.2fr; gap: 14px; padding: 14px; align-items: center; }
.pump-illustration { width: 100%; max-width: 360px; aspect-ratio: 4/5; display: grid; place-items: center; margin: 0 auto; }
.pump-illustration img { width: 100%; height: auto; display: block; }
.pump-photo { position: relative; width: 50%; max-width: 320px; margin: 0 auto; }
.pump-photo img { display: block; }
.pump-status-reading { margin-top: 10px; width: 50%; max-width: 320px; }
.pump-status-reading span { display: block; text-align: center; background: var(--panel-alt); border: 1px solid var(--border-light); border-radius: 10px; padding: 8px 10px; font-weight: 600; font-size: 20px; color: #111827; margin: 0 auto; }
.pump-data { width: 100%; }
.data-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 8px 12px; }
.data-row { display: flex; align-items: center; justify-content: space-between; padding: 8px 10px; background: var(--panel-alt); border: 1px solid var(--border-light); border-radius: 10px; }
.data-row span { color: var(--muted); }

/* Gauges */
.gauges-card { grid-column: span 6; }
.gauges-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; padding: 14px; }
.gauge { background: var(--panel-alt); border: 1px solid var(--border-light); border-radius: 12px; padding: 12px; display: grid; justify-items: center; }
.gauge-label { margin-top: 8px; font-size: 13px; color: var(--muted); }

/* Charts */
.charts-card { grid-column: span 8; }
.charts-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; padding: 14px; }
.chart-item { background: var(--panel-alt); border: 1px solid var(--border-light); border-radius: 12px; padding: 10px; }
.chart-label { margin-top: 6px; color: var(--muted); font-size: 13px; }

/* Map */
.map-card { grid-column: span 4; }
.map { height: 100%; min-height: 360px; border-radius: 12px; overflow: hidden; }

/* Responsive */
@media (max-width: 1280px) {
  .pump-card, .gauges-card { grid-column: span 12; }
  .charts-card { grid-column: span 12; }
  .map-card { grid-column: span 12; }
}

@media (max-width: 900px) {
  .app-shell { grid-template-columns: 72px 1fr; }
  .sidebar { padding: 12px; }
  .nav-label { display: none; }
  .pump-content { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
  .charts-grid { grid-template-columns: 1fr; }
  .gauges-grid { grid-template-columns: repeat(2, 1fr); }
}

/* Dynamic pump color states handled via .pump-photo overlay */