:root {
  --bg-primary: #0f1720;
  --bg-secondary: #172531;
  --bg-tertiary: #1d2e3c;
  --text-primary: #e8edf2;
  --text-secondary: #9aa9b8;
  --border-color: #2a3a48;
  --accent: #2f7fd1;
  --accent-soft: rgba(47, 127, 209, 0.15);
  --green: #34c38f;
  --amber: #f1b44c;
  --red: #f46a6a;
  --purple: #9b7fe0;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: 'Inter', -apple-system, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  font-size: 14px;
  line-height: 1.5;
}

a { color: inherit; text-decoration: none; }

.topbar {
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 50;
}
.topbar-inner {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 24px;
  height: 60px;
  display: flex;
  align-items: center;
  gap: 32px;
}
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; }
.brand-mark {
  background: var(--accent);
  color: #fff;
  font-weight: 800;
  font-size: 13px;
  padding: 4px 8px;
  border-radius: 6px;
  letter-spacing: 0.5px;
}
.brand-text { font-size: 15px; }
.topnav { display: flex; gap: 24px; align-items: center; flex: 1; }
.topnav > a { color: var(--text-secondary); font-weight: 500; padding: 8px 0; }
.topnav > a:hover { color: var(--text-primary); }
.dropdown { position: relative; color: var(--text-secondary); font-weight: 500; cursor: pointer; padding: 8px 0; }
.dropdown:hover { color: var(--text-primary); }
.dropdown-menu {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  min-width: 200px;
  padding: 6px;
  box-shadow: 0 12px 32px rgba(0,0,0,0.4);
}
.dropdown:hover .dropdown-menu { display: block; }
.dropdown-menu a { display: block; padding: 8px 10px; border-radius: 6px; color: var(--text-primary); font-weight: 400; }
.dropdown-menu a:hover { background: var(--accent-soft); }
.topbar-tag {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
  padding: 4px 10px;
  border-radius: 999px;
}

.page {
  max-width: 1400px;
  margin: 0 auto;
  padding: 28px 24px 60px;
}

.page-header { margin-bottom: 24px; }
.page-header h1 { margin: 0 0 4px; font-size: 24px; font-weight: 700; }
.page-header p { margin: 0; color: var(--text-secondary); }
.breadcrumb { color: var(--text-secondary); font-size: 13px; margin-bottom: 8px; }
.breadcrumb a:hover { color: var(--accent); }

.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  gap: 16px;
  margin-bottom: 28px;
}
.stat-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 18px 20px;
}
.stat-card .label {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-secondary);
  margin-bottom: 8px;
}
.stat-card .value { font-size: 28px; font-weight: 800; }
.stat-card .sub { font-size: 12px; color: var(--text-secondary); margin-top: 6px; }
.stat-card .sub.good { color: var(--green); }
.stat-card .sub.bad { color: var(--red); }

.grid-2 { display: grid; grid-template-columns: 2fr 1fr; gap: 16px; margin-bottom: 16px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-bottom: 16px; }
.grid-half { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-bottom: 16px; }
@media (max-width: 900px) {
  .grid-2, .grid-3, .grid-half { grid-template-columns: 1fr; }
}

.panel {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 20px;
}
.panel h2 {
  font-size: 15px;
  font-weight: 600;
  margin: 0 0 4px;
}
.panel .panel-desc {
  font-size: 12px;
  color: var(--text-secondary);
  margin: 0 0 16px;
}
.chart-wrap { position: relative; height: 280px; }
.chart-wrap.tall { height: 340px; }

.controls { display: flex; gap: 10px; margin-bottom: 16px; flex-wrap: wrap; }
select, input[type=text] {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  padding: 8px 12px;
  border-radius: 8px;
  font-family: inherit;
  font-size: 13px;
}

table { width: 100%; border-collapse: collapse; font-size: 13px; }
th, td { padding: 10px 12px; text-align: left; border-bottom: 1px solid var(--border-color); }
th { color: var(--text-secondary); font-weight: 600; text-transform: uppercase; font-size: 11px; letter-spacing: 0.04em; }
tr:last-child td { border-bottom: none; }
.table-wrap { overflow-x: auto; }

.badge { display: inline-block; padding: 3px 9px; border-radius: 999px; font-size: 11px; font-weight: 600; text-transform: capitalize; }
.badge.running { background: rgba(52,195,143,0.15); color: var(--green); }
.badge.idle { background: rgba(241,180,76,0.15); color: var(--amber); }
.badge.down { background: rgba(244,106,106,0.15); color: var(--red); }
.badge.maintenance { background: rgba(155,127,224,0.15); color: var(--purple); }
.badge.low { background: rgba(154,169,184,0.15); color: var(--text-secondary); }
.badge.medium { background: rgba(241,180,76,0.15); color: var(--amber); }
.badge.high { background: rgba(244,106,106,0.15); color: var(--red); }
.badge.critical { background: rgba(244,106,106,0.25); color: #ff8a8a; }

.ai-panel {
  border: 1px solid var(--accent);
  background: linear-gradient(180deg, rgba(47,127,209,0.1), rgba(47,127,209,0.02));
}
.ai-panel h2 { display: flex; align-items: center; gap: 8px; }
.ai-badge {
  background: var(--accent);
  color: #fff;
  font-size: 10px;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 999px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.method-note {
  font-size: 12px;
  color: var(--text-secondary);
  background: var(--bg-tertiary);
  border-radius: 8px;
  padding: 10px 12px;
  margin-bottom: 14px;
}

.plant-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 16px;
  margin-bottom: 28px;
}
.plant-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 18px 20px;
  transition: border-color 0.15s;
}
.plant-card:hover { border-color: var(--accent); }
.plant-card h3 { margin: 0 0 4px; font-size: 16px; }
.plant-card .loc { color: var(--text-secondary); font-size: 12px; margin-bottom: 12px; }
.plant-card .metrics { display: flex; gap: 16px; font-size: 12px; color: var(--text-secondary); }
.plant-card .metrics b { color: var(--text-primary); font-size: 15px; display: block; }

.footer-note { text-align: center; color: var(--text-secondary); font-size: 12px; margin-top: 40px; }

.empty { color: var(--text-secondary); font-size: 13px; padding: 20px 0; text-align: center; }