:root {
  --primary-color: #002f6c;
  --primary-dark: #001d42;
  --primary-light: #004b9a;
  --accent-color: #0066cc;
  --text-dark: #1a1a1a;
  --text-light: #666666;
  --bg-light: #f8f9fa;
  --border-color: #e0e0e0;
}

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

body {
  font-family: 'Inter', sans-serif;
  color: var(--text-dark);
  line-height: 1.7;
  overflow-x: hidden;
}

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

#loading-screen.fade-out {
  opacity: 0;
  pointer-events: none;
}

.loader {
  width: 60px;
  height: 60px;
  border: 5px solid rgba(255, 255, 255, 0.3);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* Header */
.main-header {
  background: white;
  box-shadow: 0 2px 10px rgba(0,0,0,0.1);
  position: sticky;
  top: 0;
  z-index: 1000;
}

.navbar {
  padding: 1rem 0;
}

.navbar-brand {
  font-weight: 800;
  font-size: 24px;
  color: var(--primary-color) !important;
}

.nav-link {
  color: var(--text-dark) !important;
  font-weight: 500;
  margin: 0 15px;
  transition: color 0.3s;
}

.nav-link:hover {
  color: var(--primary-color) !important;
}



.text-color {
  color: #002f6c;
}

.card-hover {
  transition: all 0.3s ease;
  background: #fff;
}

.card-hover:hover {
  transform: translateY(-6px);
  box-shadow: 0 6px 20px rgba(0, 47, 108, 0.15);
}

.icon-wrapper {
  background-color: rgba(0, 47, 108, 0.08);
  width: 80px;
  height: 80px;
  border-radius: 50%;
  display: flex;
  justify-content: center;
  align-items: center;
  margin: 0 auto;
}

a.text-color:hover {
  color: #0056b3;
  text-decoration: underline;
}


.btn-primary {
  background: var(--primary-color);
  border: none;
  padding: 10px 30px;
  font-weight: 600;
  transition: all 0.3s;
}

.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 5px 15px rgba(0,47,108,0.3);
}

.btn-outline-primary {
  border-color: var(--primary-color);
  color: var(--primary-color);
  padding: 10px 30px;
  font-weight: 600;
  transition: all 0.3s;
}

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

/* Hero Section */
.hero-section {
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
  color: white;
  padding: 100px 0 80px;
  position: relative;
  overflow: hidden;
}

.hero-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('data:image/svg+xml,<svg width="100" height="100" xmlns="http://www.w3.org/2000/svg"><defs><pattern id="grid" width="40" height="40" patternUnits="userSpaceOnUse"><path d="M 40 0 L 0 0 0 40" fill="none" stroke="rgba(255,255,255,0.05)" stroke-width="1"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
  opacity: 0.3;
}

.hero-content {
  position: relative;
  z-index: 1;
}

.hero-section h1 {
  font-size: 3.5rem;
  font-weight: 800;
  margin-bottom: 25px;
  line-height: 1.2;
}

.hero-section p {
  font-size: 1.3rem;
  margin-bottom: 40px;
  opacity: 0.95;
  max-width: 800px;
}

/* Content Sections */
.content-section {
  padding: 80px 0;
}

.content-section:nth-child(even) {
  background: var(--bg-light);
}

.section-heading {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--primary-color);
  margin-bottom: 30px;
}

.subsection-heading {
  font-size: 1.8rem;
  font-weight: 600;
  color: var(--primary-dark);
  margin: 40px 0 20px;
}

.content-section p {
  font-size: 1.1rem;
  line-height: 1.8;
  margin-bottom: 20px;
  color: var(--text-dark);
}

.content-section strong {
  color: var(--primary-color);
  font-weight: 600;
}

/* Comparison Table */
.comparison-table {
  background: white;
  border-radius: 10px;
  padding: 40px;
  box-shadow: 0 5px 20px rgba(0,0,0,0.1);
  margin: 40px 0;
}

.comparison-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  margin: 30px 0;
}

.comparison-col h4 {
  color: var(--primary-color);
  font-weight: 700;
  margin-bottom: 20px;
  font-size: 1.4rem;
}

.comparison-col ul {
  list-style: none;
  padding: 0;
}

.comparison-col li {
  padding: 12px 0;
  border-bottom: 1px solid var(--border-color);
  position: relative;
  padding-left: 30px;
}

.comparison-col li:before {
  content: '•';
  position: absolute;
  left: 0;
  color: var(--primary-color);
  font-size: 1.5rem;
}

/* Use Cases */
.use-case-card {
  background: white;
  border-radius: 10px;
  padding: 30px;
  margin-bottom: 30px;
  box-shadow: 0 3px 15px rgba(0,0,0,0.08);
  transition: transform 0.3s, box-shadow 0.3s;
}

.use-case-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 25px rgba(0,0,0,0.15);
}

.use-case-card h4 {
  color: var(--primary-color);
  font-weight: 700;
  margin-bottom: 15px;
}

/* Stats Section */
.stats-section {
  background: var(--primary-color);
  color: white;
  padding: 60px 0;
}

.stat-item {
  text-align: center;
  padding: 20px;
}

.stat-number {
  font-size: 3rem;
  font-weight: 800;
  display: block;
  margin-bottom: 10px;
}

.stat-label {
  font-size: 1.1rem;
  opacity: 0.9;
}

/* Advantages */
.advantage-card {
  background: white;
  border-left: 4px solid var(--primary-color);
  padding: 30px;
  margin-bottom: 25px;
  border-radius: 8px;
  box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}

.advantage-card h4 {
  color: var(--primary-color);
  font-weight: 700;
  margin-bottom: 15px;
}

/* CTA Section */
.cta-section {
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--accent-color) 100%);
  color: white;
  padding: 80px 0;
  text-align: center;
}

.cta-section h2 {
  font-size: 2.8rem;
  font-weight: 800;
  margin-bottom: 25px;
}

.cta-section p {
  font-size: 1.2rem;
  margin-bottom: 40px;
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}

.btn-light {
  background: white;
  color: var(--primary-color);
  padding: 15px 40px;
  font-weight: 700;
  font-size: 1.1rem;
  border: none;
  transition: all 0.3s;
}

.btn-light:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 30px rgba(0,0,0,0.2);
  color: var(--primary-color);
}

/* Scroll to Top Button */
#scrollTopBtn {
  position: fixed;
  bottom: 30px;
  right: 30px;
  background: var(--primary-color);
  color: white;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  border: none;
  display: none;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.3s;
  z-index: 999;
  box-shadow: 0 4px 15px rgba(0,0,0,0.3);
}

#scrollTopBtn:hover {
  background: var(--primary-dark);
  transform: translateY(-5px);
}

#scrollTopBtn.show {
  display: flex;
}

/* List Styles */
.content-list {
  list-style: none;
  padding: 0;
  margin: 20px 0;
}

.content-list li {
  padding: 15px 0 15px 40px;
  position: relative;
  border-bottom: 1px solid var(--border-color);
}

.content-list li:before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--primary-color);
  font-weight: 700;
  font-size: 1.3rem;
}

/* Phase Cards */
.phase-card {
  background: white;
  border-radius: 10px;
  padding: 30px;
  margin-bottom: 30px;
  border-top: 4px solid var(--primary-color);
  box-shadow: 0 3px 15px rgba(0,0,0,0.08);
}

.phase-card h4 {
  color: var(--primary-color);
  font-weight: 700;
  margin-bottom: 20px;
}

/* Responsive */
@media (max-width: 768px) {
  .hero-section h1 {
    font-size: 2.2rem;
  }
  
  .hero-section p {
    font-size: 1.1rem;
  }
  
  .section-heading {
    font-size: 2rem;
  }
  
  .comparison-row {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  
  .stat-number {
    font-size: 2rem;
  }
}