:root {
  --primary: #002B49; /* Deep Corporate Navy */
  --secondary: #005A8C; /* Power Blue */
  --accent: #E3BC00; /* Energy Gold */
  --bg-dark: #0A0F14;
  --bg-card: #ffffff;
  --text-main: #1A1A1A;
  --text-muted: #666666;
  --border-color: #E0E4E8;
  --grid-line: rgba(0, 0, 0, 0.05);
  --success: #107C10;
  --danger: #A4262C;
  
  --font-display: 'Segoe UI', system-ui, -apple-system, sans-serif;
  --font-body: 'Segoe UI', system-ui, sans-serif;
  
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 2rem;
  --spacing-lg: 4rem;
  --spacing-xl: 6rem;
}

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

body {
  font-family: var(--font-body);
  background-color: #F4F7F9;
  color: var(--text-main);
  line-height: 1.5;
  overflow-x: hidden;
}

/* Typography */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.2;
}

.title-xl { font-size: 3.5rem; letter-spacing: -0.02em; }
.title-lg { font-size: 2.25rem; }
.title-md { font-size: 1.5rem; }

/* Layout Components */
.presentation-container {
  width: 100%;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.slide {
  width: 100%;
  padding: var(--spacing-lg);
  background: white;
  margin-bottom: var(--spacing-md);
  box-shadow: 0 4px 20px rgba(0,0,0,0.05);
  position: relative;
  overflow: hidden;
}

/* Hero Section */
.hero-slide {
  background: linear-gradient(135deg, var(--primary) 0%, #001a2d 100%);
  color: white;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: flex-start;
  padding-left: 10%;
  border-bottom: 8px solid var(--accent);
}

.hero-slide::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 50%;
  height: 100%;
  background: url('data:image/svg+xml,<svg width="100" height="100" viewBox="0 0 100 100" xmlns="http://www.w3.org/2000/svg"><path d="M0 0h100v100H0z" fill="none"/><path d="M0 100 L100 0" stroke="rgba(255,255,255,0.05)" stroke-width="1"/></svg>');
  background-size: 40px 40px;
  opacity: 0.3;
}

.badge-tag {
  display: inline-block;
  background: var(--accent);
  color: var(--primary);
  padding: 0.5rem 1.25rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--spacing-md);
  border-radius: 2px;
}

/* Grid & Metrics */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-md);
  margin-top: var(--spacing-lg);
}

.metric-card {
  background: white;
  border: 1px solid var(--border-color);
  padding: var(--spacing-md);
  border-radius: 4px;
  transition: transform 0.3s ease;
}

.metric-card:hover {
  transform: translateY(-5px);
  border-color: var(--secondary);
}

.metric-label {
  color: var(--text-muted);
  font-size: 0.875rem;
  text-transform: uppercase;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.metric-value {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--primary);
}

.metric-trend {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 600;
  margin-top: 0.5rem;
}

.trend-up { color: var(--success); }
.trend-down { color: var(--danger); }

/* Comparison Table */
.data-table-container {
  width: 100%;
  margin-top: var(--spacing-lg);
  overflow-x: auto;
}

.comparison-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
}

.comparison-table th {
  background: var(--primary);
  color: white;
  padding: 1.25rem;
  font-weight: 600;
}

.comparison-table td {
  padding: 1.25rem;
  border-bottom: 1px solid var(--border-color);
}

.comparison-table tr:hover {
  background-color: #f8fafc;
}

.delta-positive { color: var(--success); font-weight: 700; }
.delta-negative { color: var(--danger); font-weight: 700; }

/* Visual Chart Placeholders */
.chart-container {
  width: 100%;
  height: 400px;
  background: #fdfdfd;
  border: 1px dashed var(--border-color);
  position: relative;
  display: flex;
  align-items: flex-end;
  justify-content: space-around;
  padding: var(--spacing-md);
}

.bar-group {
  display: flex;
  gap: 8px;
  align-items: flex-end;
  height: 100%;
}

.bar {
  width: 40px;
  background: var(--primary);
  border-radius: 4px 4px 0 0;
  position: relative;
  transition: height 1s ease-out;
}

.bar.secondary { background: var(--secondary); opacity: 0.7; }
.bar.accent { background: var(--accent); }

.bar-label {
  position: absolute;
  top: -25px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 0.75rem;
  font-weight: 700;
}

/* Footer / Progress */
.slide-footer {
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
  background: white;
  padding: 1rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-top: 1px solid var(--border-color);
  z-index: 100;
}

.progress-bar {
  position: absolute;
  top: 0;
  left: 0;
  height: 3px;
  background: var(--accent);
  width: 25%;
}

.btn-nav {
  padding: 0.5rem 1rem;
  border: 1px solid var(--border-color);
  background: white;
  color: var(--primary);
  text-decoration: none;
  font-weight: 600;
  border-radius: 4px;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.btn-nav:hover {
  background: var(--primary);
  color: white;
}

.placeholder-icon {
  width: 20px;
  height: 20px;
  display: inline-block;
  background: currentColor;
  mask-size: contain;
  mask-repeat: no-repeat;
}

/* Navigation Menu */
.sidebar-nav {
  position: fixed;
  right: 20px;
  top: 50%;
  transform: translateY(-50%);
  display: flex;
  flex-direction: column;
  gap: 12px;
  z-index: 1000;
}

.nav-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: rgba(0,0,0,0.1);
  border: 2px solid transparent;
  cursor: pointer;
  transition: all 0.2s;
}

.nav-dot.active {
  background: var(--primary);
  transform: scale(1.4);
  border-color: var(--accent);
}

/* Header */
header.slide-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: var(--spacing-lg);
  border-left: 6px solid var(--primary);
  padding-left: var(--spacing-md);
}

.header-meta {
  text-align: right;
}

.meta-title {
  color: var(--secondary);
  font-weight: 800;
  text-transform: uppercase;
  font-size: 0.75rem;
}

/* Responsive */
@media (max-width: 1024px) {
  .title-xl { font-size: 2.5rem; }
  .hero-slide { padding: var(--spacing-md); }
}