:root {
  --bg-primary: #0a0f1d;
  --bg-secondary: #111827;
  --bg-card: rgba(17, 24, 39, 0.85);
  --bg-card-hover: rgba(30, 41, 59, 0.9);
  --border-color: rgba(255, 255, 255, 0.08);
  --border-active: rgba(56, 189, 248, 0.4);
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --accent-cyan: #38bdf8;
  --accent-blue: #3b82f6;
  --accent-emerald: #10b981;
  --accent-amber: #f59e0b;
  --accent-rose: #f43f5e;
  --accent-purple: #a855f7;
  --gradient-primary: linear-gradient(135deg, #38bdf8 0%, #3b82f6 50%, #8b5cf6 100%);
  --gradient-accent: linear-gradient(135deg, #10b981 0%, #38bdf8 100%);
  --shadow-lg: 0 10px 25px -5px rgba(0, 0, 0, 0.5), 0 8px 10px -6px rgba(0, 0, 0, 0.5);
  --radius-lg: 16px;
  --radius-md: 12px;
  --radius-sm: 8px;
}

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
  font-family: 'Outfit', sans-serif;
  font-weight: 700;
  color: #fff;
  letter-spacing: -0.02em;
}

/* Header & Nav */
header {
  position: sticky;
  top: 0;
  z-index: 1000;
  backdrop-filter: blur(16px);
  background: rgba(10, 15, 29, 0.85);
  border-bottom: 1px solid var(--border-color);
}

.nav-container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 1rem 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 1.25rem;
  font-weight: 700;
  color: #fff;
  text-decoration: none;
}

.logo-badge {
  background: var(--gradient-primary);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 800;
  padding: 0.25rem 0.6rem;
  border-radius: var(--radius-sm);
  text-transform: uppercase;
}

nav ul {
  display: flex;
  list-style: none;
  gap: 1.5rem;
}

nav a {
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.95rem;
  transition: all 0.2s ease;
  padding: 0.5rem 0.75rem;
  border-radius: var(--radius-sm);
}

nav a:hover, nav a.active {
  color: var(--accent-cyan);
  background: rgba(56, 189, 248, 0.1);
}

/* Hero Section */
.hero {
  padding: 4rem 1.5rem 2rem;
  max-width: 1280px;
  margin: 0 auto;
  text-align: center;
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: rgba(56, 189, 248, 0.12);
  border: 1px solid rgba(56, 189, 248, 0.3);
  color: var(--accent-cyan);
  font-size: 0.85rem;
  font-weight: 600;
  padding: 0.4rem 1rem;
  border-radius: 999px;
  margin-bottom: 1.5rem;
}

.hero h1 {
  font-size: clamp(2.2rem, 5vw, 3.8rem);
  line-height: 1.15;
  margin-bottom: 1.25rem;
  background: linear-gradient(180deg, #ffffff 0%, #cbd5e1 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero p {
  font-size: 1.15rem;
  color: var(--text-secondary);
  max-width: 800px;
  margin: 0 auto 2rem;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
  max-width: 1100px;
  margin: 2.5rem auto 0;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  padding: 1.5rem;
  border-radius: var(--radius-md);
  text-align: left;
  backdrop-filter: blur(12px);
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.stat-card:hover {
  transform: translateY(-2px);
  border-color: var(--border-active);
}

.stat-value {
  font-family: 'Outfit', sans-serif;
  font-size: 2rem;
  font-weight: 800;
  color: var(--accent-cyan);
  line-height: 1;
  margin-bottom: 0.4rem;
}

.stat-label {
  font-size: 0.85rem;
  color: var(--text-secondary);
  font-weight: 500;
}

/* Layout Containers */
.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 3rem 1.5rem;
}

.section-header {
  margin-bottom: 2.5rem;
}

.section-header h2 {
  font-size: 2rem;
  margin-bottom: 0.5rem;
}

.section-header p {
  color: var(--text-secondary);
  font-size: 1.05rem;
}

/* Grids & Cards */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(380px, 1fr));
  gap: 1.5rem;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 1.5rem;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2rem;
  backdrop-filter: blur(12px);
  transition: all 0.3s ease;
}

.card:hover {
  border-color: var(--border-active);
  box-shadow: var(--shadow-lg);
}

.card-title {
  font-size: 1.35rem;
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* Badges */
.badge {
  display: inline-block;
  padding: 0.25rem 0.6rem;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
}

.badge-emerald { background: rgba(16, 185, 129, 0.15); color: var(--accent-emerald); border: 1px solid rgba(16, 185, 129, 0.3); }
.badge-blue { background: rgba(59, 130, 246, 0.15); color: var(--accent-blue); border: 1px solid rgba(59, 130, 246, 0.3); }
.badge-amber { background: rgba(245, 158, 11, 0.15); color: var(--accent-amber); border: 1px solid rgba(245, 158, 11, 0.3); }
.badge-rose { background: rgba(244, 63, 94, 0.15); color: var(--accent-rose); border: 1px solid rgba(244, 63, 94, 0.3); }
.badge-cyan { background: rgba(56, 189, 248, 0.15); color: var(--accent-cyan); border: 1px solid rgba(56, 189, 248, 0.3); }

/* Tables */
.table-responsive {
  overflow-x: auto;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  background: var(--bg-card);
}

table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.95rem;
}

th, td {
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--border-color);
}

th {
  background: rgba(255, 255, 255, 0.03);
  font-family: 'Outfit', sans-serif;
  color: #fff;
  font-weight: 600;
}

tr:last-child td {
  border-bottom: none;
}

tr:hover td {
  background: rgba(255, 255, 255, 0.02);
}

/* Chart Containers */
.chart-container {
  position: relative;
  width: 100%;
  min-height: 300px;
  margin-top: 1rem;
}

/* Callout Box */
.callout {
  border-left: 4px solid var(--accent-cyan);
  background: rgba(56, 189, 248, 0.08);
  padding: 1.25rem 1.5rem;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  margin: 1.5rem 0;
}

.callout-title {
  font-weight: 700;
  color: var(--accent-cyan);
  margin-bottom: 0.25rem;
}

.callout-success {
  border-left-color: var(--accent-emerald);
  background: rgba(16, 185, 129, 0.08);
}
.callout-success .callout-title { color: var(--accent-emerald); }

.callout-warning {
  border-left-color: var(--accent-amber);
  background: rgba(245, 158, 11, 0.08);
}
.callout-warning .callout-title { color: var(--accent-amber); }

/* Interactive Segment Explorer */
.segment-tab-buttons {
  display: flex;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
}

.tab-btn {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  padding: 0.6rem 1.2rem;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 0.9rem;
  cursor: pointer;
  transition: all 0.2s ease;
}

.tab-btn:hover, .tab-btn.active {
  color: #fff;
  background: var(--accent-blue);
  border-color: var(--accent-blue);
}

.tab-content {
  display: none;
}

.tab-content.active {
  display: block;
}

/* Footer */
footer {
  border-top: 1px solid var(--border-color);
  padding: 3rem 1.5rem;
  background: #070b14;
  color: var(--text-muted);
  font-size: 0.9rem;
  text-align: center;
}

footer a {
  color: var(--accent-cyan);
  text-decoration: none;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-md);
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: all 0.2s ease;
  font-size: 0.95rem;
}

.btn-primary {
  background: var(--gradient-primary);
  color: #fff;
  border: none;
}

.btn-primary:hover {
  opacity: 0.9;
  transform: translateY(-1px);
}

.btn-secondary {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  color: #fff;
}

.btn-secondary:hover {
  border-color: var(--accent-cyan);
}

@media (max-width: 768px) {
  nav ul { display: none; }
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
}