:root {
  --primary: #1a56db;
  --primary-dark: #1e429f;
  --primary-light: #e8f0fe;
  --accent: #0ea5e9;
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;
  --purple: #8b5cf6;
  --bg: #f1f5f9;
  --sidebar-bg: #0f172a;
  --sidebar-text: #94a3b8;
  --sidebar-active: #1a56db;
  --card-bg: #ffffff;
  --text-primary: #0f172a;
  --text-secondary: #64748b;
  --border: #e2e8f0;
  --shadow: 0 1px 3px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -1px rgba(0,0,0,0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -2px rgba(0,0,0,0.05);
  --radius: 12px;
  --sidebar-width: 240px;
}

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg);
  color: var(--text-primary);
  display: flex;
  min-height: 100vh;
}

/* ── SIDEBAR ── */
.sidebar {
  width: var(--sidebar-width);
  background: var(--sidebar-bg);
  position: fixed;
  top: 0; left: 0; bottom: 0;
  display: flex;
  flex-direction: column;
  z-index: 100;
  overflow: hidden;
}

.sidebar-logo {
  padding: 24px 20px 20px;
  border-bottom: 1px solid rgba(255,255,255,0.07);
}

.sidebar-logo .logo-mark {
  width: 36px; height: 36px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 10px;
  font-size: 18px;
}

.sidebar-logo h1 {
  font-size: 14px;
  font-weight: 700;
  color: #fff;
  letter-spacing: 0.02em;
}

.sidebar-logo p {
  font-size: 11px;
  color: var(--sidebar-text);
  margin-top: 2px;
}

.sidebar-nav {
  flex: 1;
  padding: 16px 12px;
  overflow-y: auto;
}

.nav-section-label {
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #475569;
  padding: 8px 8px 4px;
  margin-top: 8px;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 12px;
  border-radius: 8px;
  color: var(--sidebar-text);
  text-decoration: none;
  font-size: 13.5px;
  font-weight: 500;
  transition: all 0.15s;
  margin-bottom: 2px;
}

.nav-item:hover { background: rgba(255,255,255,0.06); color: #fff; }
.nav-item.active { background: var(--primary); color: #fff; }
.nav-item .nav-icon { font-size: 16px; width: 20px; text-align: center; }

.sidebar-footer {
  padding: 16px;
  border-top: 1px solid rgba(255,255,255,0.07);
  font-size: 11px;
  color: #475569;
}

/* ── MAIN ── */
.main {
  margin-left: var(--sidebar-width);
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.topbar {
  background: var(--card-bg);
  border-bottom: 1px solid var(--border);
  padding: 0 28px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 50;
}

.topbar-title { font-size: 17px; font-weight: 700; color: var(--text-primary); }
.topbar-sub { font-size: 12px; color: var(--text-secondary); margin-top: 1px; }

.topbar-right {
  display: flex;
  align-items: center;
  gap: 12px;
}

.badge-pill {
  background: var(--primary-light);
  color: var(--primary);
  font-size: 11px;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: 20px;
}

.content {
  padding: 24px 28px;
  flex: 1;
}

/* ── KPI CARDS ── */
.kpi-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}

.kpi-card {
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
  position: relative;
  overflow: hidden;
}

.kpi-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  border-radius: var(--radius) var(--radius) 0 0;
}

.kpi-card.blue::before { background: var(--primary); }
.kpi-card.green::before { background: var(--success); }
.kpi-card.orange::before { background: var(--warning); }
.kpi-card.purple::before { background: var(--purple); }
.kpi-card.cyan::before { background: var(--accent); }
.kpi-card.red::before { background: var(--danger); }

.kpi-icon {
  width: 40px; height: 40px;
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  font-size: 18px;
  margin-bottom: 12px;
}

.kpi-card.blue .kpi-icon { background: #dbeafe; }
.kpi-card.green .kpi-icon { background: #d1fae5; }
.kpi-card.orange .kpi-icon { background: #fef3c7; }
.kpi-card.purple .kpi-icon { background: #ede9fe; }
.kpi-card.cyan .kpi-icon { background: #e0f2fe; }
.kpi-card.red .kpi-icon { background: #fee2e2; }

.kpi-label {
  font-size: 11.5px;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 4px;
}

.kpi-value {
  font-size: 24px;
  font-weight: 800;
  color: var(--text-primary);
  line-height: 1.1;
}

.kpi-sub {
  font-size: 11px;
  color: var(--text-secondary);
  margin-top: 4px;
}

/* ── CHART CARDS ── */
.chart-grid {
  display: grid;
  gap: 20px;
  margin-bottom: 20px;
}

.chart-grid-2 { grid-template-columns: 1fr 1fr; }
.chart-grid-3 { grid-template-columns: 2fr 1fr; }
.chart-grid-full { grid-template-columns: 1fr; }

.card {
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 22px;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
}

.card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 18px;
}

.card-title {
  font-size: 14.5px;
  font-weight: 700;
  color: var(--text-primary);
}

.card-sub {
  font-size: 12px;
  color: var(--text-secondary);
  margin-top: 2px;
}

.card-badge {
  font-size: 11px;
  font-weight: 600;
  padding: 3px 9px;
  border-radius: 20px;
}

.card-badge.blue { background: var(--primary-light); color: var(--primary); }
.card-badge.green { background: #d1fae5; color: #065f46; }

.chart-wrap {
  position: relative;
}

/* ── TABLE ── */
.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}

.data-table th {
  background: #f8fafc;
  padding: 9px 12px;
  text-align: left;
  font-weight: 600;
  font-size: 11.5px;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  border-bottom: 1px solid var(--border);
}

.data-table td {
  padding: 10px 12px;
  border-bottom: 1px solid #f1f5f9;
  color: var(--text-primary);
}

.data-table tr:last-child td { border-bottom: none; }
.data-table tr:hover td { background: #f8fafc; }

.rank-num {
  width: 24px; height: 24px;
  background: var(--primary-light);
  color: var(--primary);
  border-radius: 6px;
  display: inline-flex; align-items: center; justify-content: center;
  font-size: 11px;
  font-weight: 700;
}

.bar-cell { display: flex; align-items: center; gap: 8px; }
.bar-bg {
  flex: 1; height: 6px;
  background: #f1f5f9;
  border-radius: 3px;
  overflow: hidden;
}
.bar-fill {
  height: 100%;
  border-radius: 3px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  transition: width 0.6s ease;
}

.text-right { text-align: right; }
.text-mono { font-family: 'SF Mono', 'Fira Code', monospace; font-size: 12px; }
.text-bold { font-weight: 700; }
.text-green { color: var(--success); }
.text-blue { color: var(--primary); }

/* ── PROGRESS RING ── */
.progress-ring-wrap { display: flex; align-items: center; justify-content: center; padding: 20px 0; }

/* ── ZONE CARDS ── */
.zone-list { display: flex; flex-direction: column; gap: 10px; }
.zone-item {
  display: flex; align-items: center; gap: 12px;
}
.zone-dot {
  width: 10px; height: 10px;
  border-radius: 50%;
  flex-shrink: 0;
}
.zone-info { flex: 1; }
.zone-name { font-size: 13px; font-weight: 600; }
.zone-val { font-size: 12px; color: var(--text-secondary); }
.zone-bar-bg { width: 100%; height: 5px; background: #f1f5f9; border-radius: 3px; margin-top: 4px; overflow: hidden; }
.zone-bar-fill { height: 100%; border-radius: 3px; }

/* ── PAGE HEADER ── */
.page-header { margin-bottom: 22px; }
.page-header h2 { font-size: 22px; font-weight: 800; color: var(--text-primary); }
.page-header p { font-size: 13px; color: var(--text-secondary); margin-top: 4px; }

/* ── LEGEND ── */
.legend { display: flex; gap: 14px; flex-wrap: wrap; margin-top: 6px; }
.legend-item { display: flex; align-items: center; gap: 5px; font-size: 12px; color: var(--text-secondary); }
.legend-dot { width: 10px; height: 10px; border-radius: 50%; }

/* ── TABS ── */
.tab-bar { display: flex; gap: 4px; margin-bottom: 18px; background: #f1f5f9; padding: 4px; border-radius: 10px; width: fit-content; }
.tab-btn {
  padding: 7px 16px;
  border-radius: 7px;
  border: none;
  background: transparent;
  color: var(--text-secondary);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s;
}
.tab-btn.active { background: white; color: var(--primary); box-shadow: var(--shadow); }