/* SASOL Mining Proposal - Revolutionary CSS Design */

/* CSS Custom Properties */
:root {
  /* Color Palette */
  --primary-color: #1a365d;
  --primary-light: #2d5a87;
  --primary-dark: #0f2a44;
  --secondary-color: #065f46;
  --secondary-light: #059669;
  --accent-color: #d97706;
  --accent-light: #f59e0b;
  --accent-dark: #b45309;
  --success-color: #10b981;
  --warning-color: #f59e0b;
  --error-color: #ef4444;
  --info-color: #3b82f6;
  
  /* Neutral Colors */
  --white: #ffffff;
  --gray-50: #f9fafb;
  --gray-100: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-300: #d1d5db;
  --gray-400: #9ca3af;
  --gray-500: #6b7280;
  --gray-600: #4b5563;
  --gray-700: #374151;
  --gray-800: #1f2937;
  --gray-900: #111827;
  
  /* Gradients */
  --gradient-primary: linear-gradient(135deg, #1a365d 0%, #2563eb 100%);
  --gradient-secondary: linear-gradient(135deg, #065f46 0%, #059669 100%);
  --gradient-accent: linear-gradient(135deg, #d97706 0%, #f59e0b 100%);
  --gradient-hero: linear-gradient(135deg, rgba(26, 54, 93, 0.95) 0%, rgba(6, 95, 70, 0.9) 100%);
  --gradient-glass: linear-gradient(135deg, rgba(255, 255, 255, 0.1) 0%, rgba(255, 255, 255, 0.05) 100%);
  
  /* Shadows */
  --shadow-sm: 0 1px 2px 0 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);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
  --shadow-glow: 0 0 20px rgba(217, 119, 6, 0.3);
  
  /* Typography */
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-weight-light: 300;
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  --font-weight-extrabold: 800;
  --font-weight-black: 900;
  
  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  --spacing-3xl: 4rem;
  
  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  --radius-full: 9999px;
  
  /* Transitions */
  --transition-fast: 150ms ease-out;
  --transition-normal: 300ms ease-out;
  --transition-slow: 500ms ease-out;
  --transition-bounce: 300ms cubic-bezier(0.68, -0.55, 0.265, 1.55);
  
  /* Z-Index */
  --z-dropdown: 1000;
  --z-sticky: 1020;
  --z-fixed: 1030;
  --z-modal-backdrop: 1040;
  --z-modal: 1050;
  --z-popover: 1060;
  --z-tooltip: 1070;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-family);
  font-weight: var(--font-weight-normal);
  line-height: 1.6;
  color: var(--gray-800);
  background-color: var(--white);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: var(--font-weight-bold);
  line-height: 1.2;
  color: var(--gray-900);
  margin-bottom: var(--spacing-md);
}

h1 { font-size: 3.5rem; }
h2 { font-size: 2.5rem; }
h3 { font-size: 2rem; }
h4 { font-size: 1.5rem; }
h5 { font-size: 1.25rem; }
h6 { font-size: 1.125rem; }

p {
  margin-bottom: var(--spacing-md);
  color: var(--gray-600);
}

a {
  color: var(--accent-color);
  text-decoration: none;
  transition: var(--transition-fast);
}

a:hover {
  color: var(--accent-dark);
}

/* Loading Screen */
.loading-screen {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--gradient-hero);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  transition: opacity 0.5s ease-out, visibility 0.5s ease-out;
}

.loading-screen.hidden {
  opacity: 0;
  visibility: hidden;
}

.loading-content {
  text-align: center;
  color: var(--white);
}

.loading-logo {
  font-size: 4rem;
  margin-bottom: var(--spacing-lg);
  animation: pulse 2s infinite;
}

.loading-text h3 {
  color: var(--white);
  font-size: 1.5rem;
  margin-bottom: var(--spacing-sm);
}

.loading-text p {
  color: rgba(255, 255, 255, 0.8);
  margin-bottom: var(--spacing-xl);
}

.loading-progress {
  width: 200px;
  height: 4px;
  background: rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-full);
  overflow: hidden;
  margin: 0 auto;
}

.loading-progress .progress-bar {
  height: 100%;
  background: var(--gradient-accent);
  border-radius: var(--radius-full);
  animation: loading 2s ease-in-out infinite;
}

@keyframes loading {
  0% { width: 0%; }
  50% { width: 70%; }
  100% { width: 100%; }
}

@keyframes pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.1); }
}

/* Navigation */
.navbar {
  background: rgba(26, 54, 93, 0.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  transition: var(--transition-normal);
  padding: var(--spacing-md) 0;
}

.navbar.scrolled {
  background: rgba(26, 54, 93, 0.98);
  box-shadow: var(--shadow-lg);
  padding: var(--spacing-sm) 0;
}

.navbar-brand {
  font-weight: var(--font-weight-extrabold);
  font-size: 1.25rem;
  color: var(--white) !important;
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.navbar-brand i {
  font-size: 1.5rem;
  color: var(--accent-color);
}

.navbar-toggler {
  border: none;
  padding: var(--spacing-sm);
  width: 40px;
  height: 40px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 4px;
}

.navbar-toggler span {
  width: 20px;
  height: 2px;
  background: var(--white);
  transition: var(--transition-normal);
  border-radius: var(--radius-full);
}

.navbar-toggler.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.navbar-toggler.active span:nth-child(2) {
  opacity: 0;
}

.navbar-toggler.active span:nth-child(3) {
  transform: rotate(-45deg) translate(7px, -6px);
}

.nav-link {
  color: rgba(255, 255, 255, 0.9) !important;
  font-weight: var(--font-weight-medium);
  padding: var(--spacing-sm) var(--spacing-md) !important;
  border-radius: var(--radius-md);
  transition: var(--transition-normal);
  position: relative;
}

.nav-link:hover,
.nav-link.active {
  color: var(--accent-color) !important;
  background: rgba(217, 119, 6, 0.1);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--accent-color);
  transition: var(--transition-normal);
  transform: translateX(-50%);
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 80%;
}

/* Hero Section */
.hero-section {
  min-height: 100vh;
  position: relative;
  display: flex;
  align-items: center;
  overflow: hidden;
}

.hero-background {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, rgba(26, 54, 93, 0.95) 0%, rgba(6, 95, 70, 0.9) 100%),
              url('https://images.pexels.com/photos/162568/coal-anthracite-coal-mining-heating-162568.jpeg?auto=compress&cs=tinysrgb&w=1920&h=1080&fit=crop') center/cover;
  z-index: -2;
}

.hero-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle at 30% 70%, rgba(217, 119, 6, 0.1) 0%, transparent 50%);
  z-index: -1;
}

.particles {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
}

.hero-content {
  position: relative;
  z-index: 2;
  color: var(--white);
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  background: rgba(217, 119, 6, 0.2);
  border: 1px solid rgba(217, 119, 6, 0.3);
  color: var(--accent-color);
  padding: var(--spacing-sm) var(--spacing-lg);
  border-radius: var(--radius-full);
  font-weight: var(--font-weight-semibold);
  font-size: 0.875rem;
  margin-bottom: var(--spacing-xl);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  opacity: 0;
  transform: translateY(30px);
  transition: var(--transition-slow);
}

.hero-title {
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: var(--font-weight-black);
  line-height: 1.1;
  margin-bottom: var(--spacing-xl);
  color: var(--white);
  opacity: 0;
  transform: translateY(30px);
  transition: var(--transition-slow);
}

.accent-text {
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  display: block;
  margin-top: var(--spacing-sm);
}

.hero-description {
  font-size: 1.25rem;
  line-height: 1.6;
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: var(--spacing-2xl);
  max-width: 600px;
  opacity: 0;
  transform: translateY(30px);
  transition: var(--transition-slow);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-lg);
  opacity: 0;
  transform: translateY(30px);
  transition: var(--transition-slow);
}

.hero-stats {
  position: relative;
  z-index: 2;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-lg);
}

.stat-card {
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-xl);
  padding: var(--spacing-xl);
  text-align: center;
  transition: var(--transition-normal);
  opacity: 0;
  transform: translateY(30px) scale(0.9);
}

.stat-card:hover {
  transform: translateY(-5px) scale(1.02);
  background: rgba(255, 255, 255, 0.15);
}

.stat-icon {
  font-size: 2rem;
  color: var(--accent-color);
  margin-bottom: var(--spacing-md);
}

.stat-number {
  font-size: 2.5rem;
  font-weight: var(--font-weight-black);
  color: var(--white);
  line-height: 1;
}

.stat-unit {
  font-size: 1rem;
  color: var(--accent-color);
  font-weight: var(--font-weight-semibold);
}

.stat-label {
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.8);
  margin-top: var(--spacing-sm);
}

.scroll-indicator {
  position: absolute;
  bottom: var(--spacing-2xl);
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
}

.scroll-arrow {
  width: 40px;
  height: 40px;
  border: 2px solid rgba(255, 255, 255, 0.5);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255, 255, 255, 0.8);
  animation: bounce 2s infinite;
  cursor: pointer;
  transition: var(--transition-normal);
}

.scroll-arrow:hover {
  border-color: var(--accent-color);
  color: var(--accent-color);
}

@keyframes bounce {
  0%, 20%, 50%, 80%, 100% { transform: translateY(0); }
  40% { transform: translateY(-10px); }
  60% { transform: translateY(-5px); }
}

/* Section Styles */
section {
  padding: var(--spacing-3xl) 0;
  position: relative;
}

.overview-section {
  background: var(--gray-50);
}

.section-header {
  text-align: center;
  margin-bottom: var(--spacing-3xl);
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}

.section-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  background: rgba(217, 119, 6, 0.1);
  border: 1px solid rgba(217, 119, 6, 0.2);
  color: var(--accent-color);
  padding: var(--spacing-sm) var(--spacing-lg);
  border-radius: var(--radius-full);
  font-weight: var(--font-weight-semibold);
  font-size: 0.875rem;
  margin-bottom: var(--spacing-lg);
}

.section-title {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: var(--font-weight-black);
  color: var(--gray-900);
  margin-bottom: var(--spacing-lg);
}

.section-description {
  font-size: 1.125rem;
  color: var(--gray-600);
  line-height: 1.7;
  margin-bottom: 0;
}

/* Feature Cards */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: var(--spacing-xl);
}

.feature-card {
  background: var(--white);
  border-radius: var(--radius-xl);
  padding: var(--spacing-2xl);
  box-shadow: var(--shadow-md);
  border: 1px solid var(--gray-200);
  transition: var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: var(--gradient-accent);
  transform: scaleX(0);
  transition: var(--transition-normal);
}

.feature-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
}

.feature-card:hover::before {
  transform: scaleX(1);
}

.feature-icon {
  width: 80px;
  height: 80px;
  background: var(--gradient-primary);
  border-radius: var(--radius-xl);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  color: var(--white);
  margin-bottom: var(--spacing-xl);
  transition: var(--transition-normal);
}

.feature-card:hover .feature-icon {
  transform: scale(1.1) rotate(5deg);
}

.feature-content h4 {
  color: var(--gray-900);
  margin-bottom: var(--spacing-md);
}

.feature-content p {
  color: var(--gray-600);
  margin-bottom: 0;
}

.feature-glow {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 200px;
  height: 200px;
  background: radial-gradient(circle, rgba(217, 119, 6, 0.1) 0%, transparent 70%);
  transform: translate(-50%, -50%);
  opacity: 0;
  transition: var(--transition-slow);
  pointer-events: none;
}

.feature-card:hover .feature-glow {
  opacity: 1;
}

/* Timeline Section */
.timeline-section {
  background: var(--gray-50);
}

.timeline-visualization {
  background: var(--white);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--gray-200);
  overflow: hidden;
  margin-bottom: var(--spacing-3xl);
}

.timeline-controls {
  display: flex;
  background: var(--gray-50);
  border-bottom: 1px solid var(--gray-200);
  padding: var(--spacing-md);
  gap: var(--spacing-sm);
}

.timeline-btn {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md) var(--spacing-lg);
  border: 1px solid var(--gray-300);
  background: var(--white);
  color: var(--gray-600);
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  font-weight: var(--font-weight-medium);
  transition: var(--transition-normal);
  cursor: pointer;
}

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

.timeline-btn.active {
  background: var(--accent-color);
  border-color: var(--accent-color);
  color: var(--white);
}

.timeline-view {
  display: none;
  padding: var(--spacing-2xl);
}

.timeline-view.active {
  display: block;
}

.timeline-container {
  max-width: 1200px;
  margin: 0 auto;
  position: relative;
}

.timeline-phase {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-2xl);
  margin-bottom: var(--spacing-3xl);
  position: relative;
}

.timeline-phase:last-child {
  margin-bottom: 0;
}

.phase-marker {
  position: relative;
  flex-shrink: 0;
  z-index: 2;
}

.marker-number {
  width: 60px;
  height: 60px;
  background: var(--gradient-primary);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  font-weight: var(--font-weight-black);
  color: var(--white);
  box-shadow: var(--shadow-lg);
  position: relative;
}

.marker-line {
  position: absolute;
  top: 60px;
  left: 50%;
  width: 2px;
  height: 100px;
  background: linear-gradient(to bottom, var(--primary-color), var(--accent-color));
  transform: translateX(-50%);
}

.timeline-phase:last-child .marker-line {
  display: none;
}

.phase-content {
  flex: 1;
  min-width: 0;
}

.phase-card {
  background: var(--white);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--gray-200);
  overflow: hidden;
  transition: var(--transition-normal);
}

.phase-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-2xl);
}

.phase-header {
  padding: var(--spacing-xl);
  border-bottom: 1px solid var(--gray-200);
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: var(--gray-50);
}

.phase-title h4 {
  margin-bottom: var(--spacing-xs);
  color: var(--gray-900);
}

.phase-duration {
  font-size: 0.875rem;
  color: var(--gray-500);
  font-weight: var(--font-weight-medium);
}

.phase-priority {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  font-weight: var(--font-weight-semibold);
}

.phase-priority.high {
  background: rgba(239, 68, 68, 0.1);
  color: #dc2626;
}

.phase-priority.medium {
  background: rgba(245, 158, 11, 0.1);
  color: #d97706;
}

.phase-priority.low {
  background: rgba(59, 130, 246, 0.1);
  color: #2563eb;
}

.phase-body {
  padding: var(--spacing-xl);
}

.phase-metrics {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-xl);
}

.phase-metrics .metric-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-md);
  background: var(--gray-50);
  border-radius: var(--radius-md);
}

.phase-metrics .metric-item i {
  font-size: 1.25rem;
  color: var(--accent-color);
  flex-shrink: 0;
}

.phase-metrics .metric-content {
  flex: 1;
  min-width: 0;
}

.phase-metrics .metric-value {
  font-size: 1rem;
  font-weight: var(--font-weight-bold);
  color: var(--gray-900);
  line-height: 1.2;
}

.phase-metrics .metric-label {
  font-size: 0.75rem;
  color: var(--gray-500);
  font-weight: var(--font-weight-medium);
}

.phase-progress {
  margin-top: var(--spacing-lg);
}

.phase-progress .progress-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-sm);
  font-size: 0.875rem;
  font-weight: var(--font-weight-medium);
  color: var(--gray-700);
}

.progress-bar {
  height: 6px;
  background: var(--gray-200);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: var(--gradient-accent);
  border-radius: var(--radius-full);
  transition: width 1s ease-out;
}

/* Detailed Timeline View */
.detailed-timeline-container {
  max-width: 1000px;
  margin: 0 auto;
}

.detailed-timeline-container h3 {
  text-align: center;
  margin-bottom: var(--spacing-2xl);
  color: var(--gray-900);
}

.stockpile-timeline {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xl);
}

.stockpile-schedule {
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--gray-200);
  transition: var(--transition-normal);
}

.stockpile-schedule:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.stockpile-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-lg);
}

.stockpile-header h5 {
  margin-bottom: 0;
  color: var(--gray-900);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.stockpile-header h5 i {
  color: var(--accent-color);
}

.duration-badge {
  background: var(--gray-100);
  color: var(--gray-700);
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  font-weight: var(--font-weight-medium);
}

.timeline-bars {
  display: flex;
  width: 100%;
  height: 40px;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.timeline-bar {
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--white);
  font-size: 0.75rem;
  font-weight: var(--font-weight-semibold);
  text-align: center;
  transition: var(--transition-normal);
  position: relative;
}

.timeline-bar:hover {
  filter: brightness(1.1);
  transform: scaleY(1.1);
  z-index: 1;
}

.timeline-bar.sampling {
  background: linear-gradient(135deg, #3b82f6, #1d4ed8);
}

.timeline-bar.lab {
  background: linear-gradient(135deg, #f59e0b, #d97706);
}

.timeline-bar.processing {
  background: linear-gradient(135deg, #10b981, #059669);
}

.timeline-bar.modelling {
  background: linear-gradient(135deg, #ef4444, #dc2626);
}

.timeline-bar.reporting {
  background: linear-gradient(135deg, #8b5cf6, #7c3aed);
}

/* Gantt Chart View */
.gantt-container {
  max-width: 1000px;
  margin: 0 auto;
}

.gantt-container h3 {
  text-align: center;
  margin-bottom: var(--spacing-2xl);
  color: var(--gray-900);
}

.gantt-chart {
  background: var(--white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--gray-200);
}

.gantt-header {
  background: var(--gray-50);
  padding: var(--spacing-lg);
  border-bottom: 1px solid var(--gray-200);
}

.gantt-timeline-header {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--spacing-sm);
  text-align: center;
  font-weight: var(--font-weight-semibold);
  color: var(--gray-700);
}

.gantt-body {
  padding: var(--spacing-lg);
}

.gantt-row {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: var(--spacing-lg);
  align-items: center;
  margin-bottom: var(--spacing-lg);
}

.gantt-row:last-child {
  margin-bottom: 0;
}

.gantt-label {
  font-weight: var(--font-weight-semibold);
  color: var(--gray-900);
  font-size: 0.875rem;
}

.gantt-bars {
  position: relative;
  height: 24px;
  background: var(--gray-100);
  border-radius: var(--radius-md);
}

.gantt-bar {
  position: absolute;
  top: 0;
  height: 100%;
  border-radius: var(--radius-md);
  transition: var(--transition-normal);
}

.gantt-bar:hover {
  filter: brightness(1.1);
  transform: scaleY(1.2);
}

.gantt-bar.phase-1 {
  background: linear-gradient(135deg, #3b82f6, #1d4ed8);
}

.gantt-bar.phase-2 {
  background: linear-gradient(135deg, #f59e0b, #d97706);
}

.gantt-bar.phase-3 {
  background: linear-gradient(135deg, #10b981, #059669);
}

.gantt-bar.phase-4 {
  background: linear-gradient(135deg, #ef4444, #dc2626);
}

/* Timeline Summary */
.timeline-summary {
  margin-top: var(--spacing-3xl);
}

.summary-card {
  background: var(--white);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--gray-200);
  overflow: hidden;
}

.summary-header {
  padding: var(--spacing-xl);
  background: var(--gray-900);
  color: var(--white);
  text-align: center;
}

.summary-header h4 {
  margin-bottom: 0;
  color: var(--white);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
}

.summary-metrics {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-xl);
  padding: var(--spacing-2xl);
}

.summary-metric {
  text-align: center;
}

.summary-metric .metric-icon {
  width: 60px;
  height: 60px;
  background: var(--gradient-accent);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  color: var(--white);
  margin: 0 auto var(--spacing-md);
}

.summary-metric .metric-number {
  font-size: 2rem;
  font-weight: var(--font-weight-black);
  color: var(--gray-900);
  line-height: 1;
}

.summary-metric .metric-label {
  font-size: 0.875rem;
  color: var(--gray-500);
  font-weight: var(--font-weight-medium);
  margin-top: var(--spacing-xs);
}

/* Contact Section */
.contact-section {
  background: var(--gray-900);
  color: var(--white);
}

.contact-section .section-badge {
  background: rgba(217, 119, 6, 0.2);
  border-color: rgba(217, 119, 6, 0.3);
  color: var(--accent-color);
}

.contact-section .section-title {
  color: var(--white);
}

.contact-section .section-description {
  color: rgba(255, 255, 255, 0.8);
}

.contact-card {
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-xl);
  padding: var(--spacing-2xl);
  margin-bottom: var(--spacing-xl);
  text-align: center;
}

.contact-avatar {
  font-size: 4rem;
  color: var(--accent-color);
  margin-bottom: var(--spacing-lg);
}

.contact-info h4 {
  color: var(--white);
  margin-bottom: var(--spacing-sm);
}

.contact-title {
  font-size: 1.125rem;
  color: var(--accent-color);
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--spacing-lg);
}

.contact-details {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
  text-align: left;
  max-width: 500px;
  margin: 0 auto;
}

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-md);
  color: rgba(255, 255, 255, 0.9);
}

.contact-item i {
  color: var(--accent-color);
  font-size: 1.125rem;
  flex-shrink: 0;
  margin-top: 2px;
}

.contact-item a {
  color: rgba(255, 255, 255, 0.9);
  text-decoration: none;
  transition: var(--transition-normal);
}

.contact-item a:hover {
  color: var(--accent-color);
}

.contact-actions {
  margin-bottom: var(--spacing-2xl);
}

.company-info {
  margin-top: var(--spacing-3xl);
}

.info-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-xl);
}

.info-card {
  text-align: center;
  padding: var(--spacing-xl);
  transition: var(--transition-normal);
}

.info-card:hover {
  transform: translateY(-5px);
}

.info-icon {
  font-size: 2.5rem;
  color: var(--accent-color);
  margin-bottom: var(--spacing-md);
}

.info-content h6 {
  color: var(--white);
  margin-bottom: var(--spacing-sm);
}

.info-content p {
  color: rgba(255, 255, 255, 0.8);
  margin-bottom: 0;
}

/* Footer */
.footer {
  background: var(--primary-color);
  color: var(--white);
  padding: var(--spacing-xl) 0;
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--spacing-md);
}

.footer-left p,
.footer-right p {
  margin-bottom: 0;
  color: rgba(255, 255, 255, 0.9);
  font-size: 0.875rem;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md) var(--spacing-xl);
  border: 2px solid transparent;
  border-radius: var(--radius-md);
  font-weight: var(--font-weight-semibold);
  font-size: 0.875rem;
  text-decoration: none;
  transition: var(--transition-normal);
  cursor: pointer;
  position: relative;
  overflow: hidden;
}

.btn-sm {
  padding: var(--spacing-sm) var(--spacing-md);
  font-size: 0.75rem;
}

.btn-lg {
  padding: var(--spacing-lg) var(--spacing-2xl);
  font-size: 1rem;
}

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

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  color: var(--white);
}

.btn-outline-primary {
  border-color: var(--primary-color);
  color: var(--primary-color);
  background: transparent;
}

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

.btn-outline-light {
  border-color: rgba(255, 255, 255, 0.5);
  color: var(--white);
  background: transparent;
}

.btn-outline-light:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--white);
  color: var(--white);
}

/* Responsive Design */
@media (max-width: 1200px) {
  .timeline-phase {
    flex-direction: column;
    gap: var(--spacing-lg);
  }
  
  .marker-line {
    display: none;
  }
}

@media (max-width: 768px) {
  :root {
    --spacing-3xl: 3rem;
  }
  
  .hero-section {
    min-height: 90vh;
  }
  
  .hero-title {
    font-size: 2.5rem;
  }
  
  .stats-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
  }
  
  .features-grid {
    grid-template-columns: 1fr;
  }
  
  .timeline-controls {
    flex-wrap: wrap;
    justify-content: center;
  }
  
  .phase-metrics {
    grid-template-columns: 1fr;
  }
  
  .summary-metrics {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .info-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .footer-content {
    flex-direction: column;
    text-align: center;
  }
  
  .gantt-row {
    grid-template-columns: 1fr;
    gap: var(--spacing-sm);
  }
  
  .timeline-bars {
    height: 30px;
  }
  
  .timeline-bar {
    font-size: 0.6rem;
  }
}

@media (max-width: 576px) {
  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }
  
  .btn {
    justify-content: center;
  }
  
  .timeline-controls {
    flex-direction: column;
  }
  
  .phase-metrics {
    grid-template-columns: 1fr;
  }
  
  .summary-metrics {
    grid-template-columns: 1fr;
  }
  
  .info-grid {
    grid-template-columns: 1fr;
  }
  
  .contact-details {
    text-align: center;
  }
  
  .gantt-timeline-header {
    font-size: 0.75rem;
  }
}

/* Entrance Animations */
body.loaded .hero-badge {
  opacity: 1;
  transform: translateY(0);
  transition-delay: 0.2s;
}

body.loaded .hero-title {
  opacity: 1;
  transform: translateY(0);
  transition-delay: 0.4s;
}

body.loaded .hero-description {
  opacity: 1;
  transform: translateY(0);
  transition-delay: 0.6s;
}

body.loaded .hero-actions {
  opacity: 1;
  transform: translateY(0);
  transition-delay: 0.8s;
}

body.loaded .stat-card {
  opacity: 1;
  transform: translateY(0) scale(1);
  transition-delay: 1s;
}

/* Utility Classes */
.text-center { text-align: center; }
.d-flex { display: flex; }
.d-none { display: none; }
.justify-content-center { justify-content: center; }
.align-items-center { align-items: center; }
.mb-0 { margin-bottom: 0; }
.mx-auto { margin-left: auto; margin-right: auto; }
.w-100 { width: 100%; }
.position-relative { position: relative; }
.overflow-hidden { overflow: hidden; }