/* Modern Linear/Stripe-Inspired Glassmorphism Design System */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=Fira+Code:wght@400;500&display=swap');

:root {
  --bg-base: #0B0F17;
  --bg-surface: #111726;
  --bg-card: rgba(18, 24, 38, 0.75);
  --bg-card-hover: rgba(26, 35, 54, 0.85);
  --border-glass: rgba(255, 255, 255, 0.08);
  --border-glow: rgba(99, 102, 241, 0.3);
  
  --accent-indigo: #6366F1;
  --accent-violet: #8B5CF6;
  --accent-cyan: #06B6D4;
  --accent-rose: #EF4444;
  --accent-emerald: #10B981;
  --accent-amber: #F59E0B;
  
  --text-primary: #F8FAFC;
  --text-secondary: #94A3B8;
  --text-muted: #64748B;
  
  --radius-lg: 16px;
  --radius-md: 12px;
  --radius-sm: 8px;
  
  --shadow-glass: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
  --shadow-glow: 0 0 20px rgba(99, 102, 241, 0.25);
  --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
  --font-mono: 'Fira Code', monospace;
}

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

body {
  font-family: var(--font-sans);
  background-color: var(--bg-base);
  color: var(--text-primary);
  line-height: 1.5;
  min-height: 100vh;
  overflow-x: hidden;
  background-image: 
    radial-gradient(circle at 15% 15%, rgba(99, 102, 241, 0.12) 0%, transparent 40%),
    radial-gradient(circle at 85% 85%, rgba(139, 92, 246, 0.12) 0%, transparent 40%);
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}
::-webkit-scrollbar-track {
  background: var(--bg-base);
}
::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.15);
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: rgba(255, 255, 255, 0.3);
}

/* Glassmorphism Card Component */
.glass-card {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-glass);
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

.glass-card:hover {
  border-color: var(--border-glow);
  box-shadow: var(--shadow-glow);
  transform: translateY(-2px);
}

/* Header & Nav */
.header-bar {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(11, 15, 23, 0.85);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-glass);
  padding: 1rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.brand-title {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 1.25rem;
  font-weight: 700;
  background: linear-gradient(135deg, #FFF 0%, #94A3B8 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.nav-tabs {
  display: flex;
  gap: 0.5rem;
  background: rgba(255, 255, 255, 0.04);
  padding: 0.25rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-glass);
}

.nav-btn {
  padding: 0.5rem 1rem;
  border-radius: var(--radius-sm);
  border: none;
  background: transparent;
  color: var(--text-secondary);
  font-weight: 500;
  font-size: 0.875rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  transition: all 0.2s ease;
}

.nav-btn:hover {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.06);
}

.nav-btn.active {
  background: var(--accent-indigo);
  color: #FFF;
  box-shadow: 0 0 12px rgba(99, 102, 241, 0.4);
}

/* Filter Toolbar */
.filter-toolbar {
  margin: 1.5rem 2rem;
  padding: 1.25rem;
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: center;
}

.filter-group {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.filter-label {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
}

.glass-select, .glass-input {
  background: rgba(17, 23, 38, 0.9);
  border: 1px solid var(--border-glass);
  color: var(--text-primary);
  padding: 0.5rem 0.85rem;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  outline: none;
  transition: border-color 0.2s ease;
}

.glass-select:focus, .glass-input:focus {
  border-color: var(--accent-indigo);
  box-shadow: 0 0 0 2px rgba(99, 102, 241, 0.2);
}

/* KPI Grid */
.kpi-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.25rem;
  margin: 0 2rem 2rem 2rem;
}

.kpi-card {
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
  overflow: hidden;
}

.kpi-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--text-muted);
  font-size: 0.85rem;
  font-weight: 500;
}

.kpi-icon-box {
  padding: 0.4rem;
  border-radius: var(--radius-sm);
  background: rgba(99, 102, 241, 0.1);
  color: var(--accent-indigo);
}

.kpi-value {
  font-size: 2.1rem;
  font-weight: 800;
  margin: 0.5rem 0 0.25rem 0;
  letter-spacing: -0.03em;
  background: linear-gradient(180deg, #FFFFFF 0%, #CBD5E1 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.kpi-subtext {
  font-size: 0.75rem;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.badge-success {
  background: rgba(16, 185, 129, 0.15);
  color: var(--accent-emerald);
  padding: 0.15rem 0.5rem;
  border-radius: 9999px;
  font-weight: 600;
  font-size: 0.7rem;
}

.badge-danger {
  background: rgba(239, 68, 68, 0.15);
  color: var(--accent-rose);
  padding: 0.15rem 0.5rem;
  border-radius: 9999px;
  font-weight: 600;
  font-size: 0.7rem;
}

/* Main Visuals Grid */
.charts-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 1.5rem;
  margin: 0 2rem 2rem 2rem;
}

.col-span-12 { grid-column: span 12; }
.col-span-8  { grid-column: span 8; }
.col-span-6  { grid-column: span 6; }
.col-span-4  { grid-column: span 4; }

@media (max-width: 1024px) {
  .col-span-8, .col-span-6, .col-span-4 {
    grid-column: span 12;
  }
}

.chart-card {
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  min-height: 380px;
}

.chart-title-area {
  margin-bottom: 1.25rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.chart-title {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.chart-subtitle {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 0.15rem;
}

.chart-canvas-container {
  flex: 1;
  position: relative;
  width: 100%;
  height: 280px;
}

/* Insights & Recommendations */
.insights-panel {
  margin: 0 2rem 2rem 2rem;
  padding: 1.5rem;
}

.insight-card-item {
  padding: 1rem;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-glass);
  margin-top: 1rem;
  display: flex;
  gap: 1rem;
  align-items: flex-start;
}

.insight-icon-alert {
  color: var(--accent-rose);
  background: rgba(239, 68, 68, 0.1);
  padding: 0.5rem;
  border-radius: var(--radius-sm);
}

.insight-icon-warn {
  color: var(--accent-amber);
  background: rgba(245, 158, 11, 0.1);
  padding: 0.5rem;
  border-radius: var(--radius-sm);
}

/* SQL & Python Tab Layouts */
.section-view {
  margin: 0 2rem 2rem 2rem;
}

.query-selector-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  max-height: 600px;
  overflow-y: auto;
  padding-right: 0.5rem;
}

.query-item-btn {
  padding: 0.85rem 1rem;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  text-align: left;
  cursor: pointer;
  font-size: 0.85rem;
  font-weight: 500;
  transition: all 0.2s ease;
}

.query-item-btn:hover, .query-item-btn.active {
  background: rgba(99, 102, 241, 0.15);
  border-color: var(--accent-indigo);
  color: var(--text-primary);
}

.code-block {
  font-family: var(--font-mono);
  background: #07090E;
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-sm);
  padding: 1.25rem;
  color: #A5B4FC;
  font-size: 0.85rem;
  overflow-x: auto;
  white-space: pre-wrap;
  line-height: 1.6;
}

/* Data Table Component */
.data-table-container {
  overflow-x: auto;
}

.glass-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.875rem;
}

.glass-table th {
  background: rgba(255, 255, 255, 0.03);
  padding: 0.85rem 1rem;
  color: var(--text-muted);
  font-weight: 600;
  border-bottom: 1px solid var(--border-glass);
  text-transform: uppercase;
  font-size: 0.75rem;
}

.glass-table td {
  padding: 0.85rem 1rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
  color: var(--text-secondary);
}

.glass-table tr:hover td {
  background: rgba(255, 255, 255, 0.02);
  color: var(--text-primary);
}

.pill-attrition-yes {
  background: rgba(239, 68, 68, 0.2);
  color: #FCA5A5;
  padding: 0.2rem 0.6rem;
  border-radius: 9999px;
  font-size: 0.75rem;
  font-weight: 600;
}

.pill-attrition-no {
  background: rgba(16, 185, 129, 0.2);
  color: #6EE7B7;
  padding: 0.2rem 0.6rem;
  border-radius: 9999px;
  font-size: 0.75rem;
  font-weight: 600;
}