:root {
  --primary-color: #003087;
  --secondary-color: #FF6B00;
  --accent-color: #00A0E3;
  --dark-color: #001F54;
  --light-gray: #F5F7FA;
  --text-dark: #2C3E50;
  --text-light: #6C757D;
  --success-color: #28A745;
  --border-radius: 12px;
  --box-shadow: 0 4px 20px rgba(0, 48, 135, 0.1);
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* AI Image Placeholder Styling */
ai-img {
  display: block;
  background: linear-gradient(135deg, #e9f2ff 0%, #d4e7ff 100%);
  position: relative;
  border-radius: var(--border-radius);
  overflow: hidden;
}

ai-img::before {
  content: attr(alt);
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  color: var(--primary-color);
  font-size: 13px;
  font-weight: 600;
  text-align: center;
  padding: 1rem;
  max-width: 80%;
}

ai-img::after {
  content: '🖨️';
  position: absolute;
  top: 15px;
  right: 15px;
  font-size: 28px;
  opacity: 0.6;
}

ai-img.rounded-circle {
  border-radius: 50%;
}

ai-img.card-img-top {
  border-radius: var(--border-radius) var(--border-radius) 0 0;
}

ai-img[logo="true"]::after {
  content: '🅱️';
  font-size: 24px;
}

/* Global Styles */
body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  color: var(--text-dark);
  line-height: 1.7;
}

h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  color: var(--dark-color);
  line-height: 1.3;
}

/* Promo Bar */
.promo-bar {
  background: linear-gradient(135deg, var(--secondary-color) 0%, #FF8C33 100%);
  font-weight: 600;
  letter-spacing: 0.3px;
}

.promo-bar .btn-light {
  font-weight: 700;
  border-radius: 20px;
  padding: 0.4rem 1.2rem;
  transition: var(--transition);
}

.promo-bar .btn-light:hover {
  transform: scale(1.05);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

/* Top Bar */
.top-bar {
  background-color: var(--dark-color);
  font-size: 0.9rem;
}

.top-bar a {
  text-decoration: none;
  transition: var(--transition);
}

.top-bar a:hover {
  color: var(--secondary-color) !important;
}

/* Navigation */
.navbar {
  padding: 1rem 0;
  transition: var(--transition);
  box-shadow: 0 2px 15px rgba(0, 0, 0, 0.08);
}

.navbar-brand ai-img {
  height: 50px;
  width: auto;
}

.navbar-light .navbar-nav .nav-link {
  color: var(--text-dark);
  font-weight: 600;
  padding: 0.75rem 1.2rem;
  transition: var(--transition);
  position: relative;
}

.navbar-light .navbar-nav .nav-link::after {
  content: '';
  position: absolute;
  bottom: 8px;
  left: 50%;
  width: 0;
  height: 3px;
  background: var(--secondary-color);
  transition: var(--transition);
  transform: translateX(-50%);
}

.navbar-light .navbar-nav .nav-link:hover::after,
.navbar-light .navbar-nav .nav-link.active::after {
  width: 60%;
}

.navbar-light .navbar-nav .nav-link:hover {
  color: var(--primary-color);
}

.navbar .btn-primary {
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--accent-color) 100%);
  border: none;
  padding: 0.6rem 1.8rem;
  font-weight: 700;
  border-radius: 25px;
  transition: var(--transition);
  box-shadow: 0 4px 15px rgba(0, 48, 135, 0.3);
}

.navbar .btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0, 48, 135, 0.4);
}

/* Breadcrumb */
.breadcrumb {
  background-color: transparent;
  padding: 1.5rem 0;
}

.breadcrumb-item a {
  color: var(--primary-color);
  text-decoration: none;
  font-weight: 600;
  transition: var(--transition);
}

.breadcrumb-item a:hover {
  color: var(--secondary-color);
}

/* Hero Section */
.hero-section {
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--dark-color) 100%);
  color: white;
  padding: 5rem 0;
  position: relative;
  overflow: hidden;
}

.hero-section::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 50%;
  height: 100%;
  background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><circle cx="50" cy="50" r="40" fill="rgba(255,107,0,0.1)"/></svg>');
  background-size: 200px;
  opacity: 0.3;
}

.hero-section h1 {
  color: white;
  font-size: 3rem;
  margin-bottom: 1.5rem;
  text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.hero-section p {
  font-size: 1.3rem;
  margin-bottom: 2rem;
  opacity: 0.95;
}

/* Cards */
.card {
  border: none;
  border-radius: var(--border-radius);
  transition: var(--transition);
  box-shadow: 0 2px 15px rgba(0, 0, 0, 0.08);
  overflow: hidden;
}

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

.card-title {
  color: var(--primary-color);
  font-weight: 700;
  font-size: 1.3rem;
}

.card .btn-primary {
  background: var(--primary-color);
  border: none;
  border-radius: 20px;
  padding: 0.6rem 1.5rem;
  font-weight: 600;
  transition: var(--transition);
}

.card .btn-primary:hover {
  background: var(--secondary-color);
  transform: scale(1.05);
}

/* Stats Section */
.stats-section {
  background: linear-gradient(135deg, var(--light-gray) 0%, #ffffff 100%);
  padding: 4rem 0;
}

.stat-card {
  text-align: center;
  padding: 2rem;
  background: white;
  border-radius: var(--border-radius);
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.06);
  transition: var(--transition);
}

.stat-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.12);
}

.stat-number {
  font-size: 3rem;
  font-weight: 800;
  color: var(--secondary-color);
  display: block;
  margin-bottom: 0.5rem;
}

.stat-label {
  font-size: 1.1rem;
  color: var(--text-light);
  font-weight: 600;
}

/* Product Categories */
.category-card {
  position: relative;
  border-radius: var(--border-radius);
  overflow: hidden;
  height: 300px;
  display: flex;
  align-items: flex-end;
  padding: 2rem;
  color: white;
  transition: var(--transition);
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--accent-color) 100%);
}

.category-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(to top, rgba(0, 0, 0, 0.7) 0%, transparent 100%);
  transition: var(--transition);
}

.category-card:hover::before {
  background: linear-gradient(to top, rgba(255, 107, 0, 0.8) 0%, transparent 100%);
}

.category-card h3 {
  position: relative;
  z-index: 1;
  color: white;
  margin: 0;
  font-size: 1.8rem;
}

.category-card:hover {
  transform: scale(1.03);
}

/* Author Card */
.author-card {
  border-left: 5px solid var(--secondary-color);
  border-radius: var(--border-radius);
  transition: var(--transition);
}

.author-card:hover {
  box-shadow: var(--box-shadow);
  transform: translateX(5px);
}

.author-card ai-img {
  border: 4px solid var(--secondary-color);
  box-shadow: 0 4px 15px rgba(255, 107, 0, 0.3);
}

.author-card h4 {
  color: var(--primary-color);
  font-size: 1.5rem;
  font-weight: 700;
}

.author-card .text-primary {
  color: var(--secondary-color) !important;
}

.author-card .badge {
  background-color: var(--primary-color);
  padding: 0.5rem 1rem;
  font-weight: 600;
  border-radius: 15px;
}

/* Forms */
.form-label {
  font-weight: 600;
  color: var(--text-dark);
  margin-bottom: 0.5rem;
}

.form-control, .form-select {
  border: 2px solid #E9ECEF;
  border-radius: 8px;
  padding: 0.75rem 1rem;
  transition: var(--transition);
}

.form-control:focus, .form-select:focus {
  border-color: var(--primary-color);
  box-shadow: 0 0 0 0.2rem rgba(0, 48, 135, 0.15);
}

form .btn-primary {
  background: linear-gradient(135deg, var(--secondary-color) 0%, #FF8C33 100%);
  border: none;
  padding: 1rem 2rem;
  font-weight: 700;
  font-size: 1.1rem;
  border-radius: 25px;
  transition: var(--transition);
}

form .btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(255, 107, 0, 0.4);
}

/* Footer */
footer {
  background: linear-gradient(135deg, var(--dark-color) 0%, #000a1f 100%);
}

footer h5 {
  color: white;
  font-weight: 700;
  margin-bottom: 1.5rem;
  font-size: 1.2rem;
}

footer a {
  transition: var(--transition);
  display: inline-block;
}

footer a:hover {
  color: var(--secondary-color) !important;
  transform: translateX(5px);
}

footer .list-unstyled li {
  margin-bottom: 0.7rem;
}

/* Floating Buttons */
.floating-buttons {
  z-index: 1000;
}

.floating-buttons .btn {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.floating-buttons .btn:hover {
  transform: scale(1.1) rotate(5deg);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
}

.floating-buttons .btn-success {
  background: #25D366;
  border: none;
}

.floating-buttons .btn-primary {
  background: var(--primary-color);
  border: none;
}

.floating-buttons .btn-secondary {
  background: var(--secondary-color);
  border: none;
}

#backToTop {
  opacity: 0;
  transition: var(--transition);
  pointer-events: none;
}

#backToTop.visible {
  opacity: 1;
  pointer-events: auto;
}

/* Modal */
.modal-header.bg-primary {
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--accent-color) 100%) !important;
}

.modal-content {
  border-radius: var(--border-radius);
  overflow: hidden;
  border: none;
}

/* Testimonials */
.testimonial-card {
  background: white;
  border-radius: var(--border-radius);
  padding: 2rem;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
  border-left: 4px solid var(--secondary-color);
  transition: var(--transition);
}

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

.testimonial-text {
  font-style: italic;
  color: var(--text-dark);
  margin-bottom: 1.5rem;
  font-size: 1.1rem;
  line-height: 1.8;
}

.testimonial-author {
  font-weight: 700;
  color: var(--primary-color);
}

/* Timeline */
.timeline {
  position: relative;
  padding: 2rem 0;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 50%;
  top: 0;
  bottom: 0;
  width: 4px;
  background: var(--secondary-color);
  transform: translateX(-50%);
}

.timeline-item {
  margin-bottom: 3rem;
  position: relative;
}

.timeline-content {
  background: white;
  padding: 2rem;
  border-radius: var(--border-radius);
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
  transition: var(--transition);
}

.timeline-content:hover {
  transform: scale(1.02);
  box-shadow: var(--box-shadow);
}

.timeline-year {
  display: inline-block;
  background: var(--secondary-color);
  color: white;
  padding: 0.5rem 1.5rem;
  border-radius: 20px;
  font-weight: 700;
  font-size: 1.2rem;
}

/* Certification Badges */
.cert-badge {
  text-align: center;
  padding: 1.5rem;
  background: white;
  border-radius: var(--border-radius);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.06);
  transition: var(--transition);
}

.cert-badge:hover {
  transform: translateY(-5px);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.12);
}

.cert-badge ai-img {
  margin: 0 auto 1rem;
  height: 80px;
  width: 80px;
}

/* Product Filter */
.filter-section {
  background: var(--light-gray);
  padding: 2rem;
  border-radius: var(--border-radius);
  margin-bottom: 2rem;
}

.filter-btn {
  background: white;
  border: 2px solid var(--primary-color);
  color: var(--primary-color);
  padding: 0.5rem 1.2rem;
  border-radius: 20px;
  margin: 0.3rem;
  font-weight: 600;
  transition: var(--transition);
}

.filter-btn:hover,
.filter-btn.active {
  background: var(--primary-color);
  color: white;
}

/* CTA Section */
.cta-section {
  background: linear-gradient(135deg, var(--secondary-color) 0%, #FF8C33 100%);
  color: white;
  padding: 5rem 0;
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -10%;
  width: 500px;
  height: 500px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 50%;
}

.cta-section h2 {
  color: white;
  font-size: 2.5rem;
  margin-bottom: 1.5rem;
}

.cta-section .btn-light {
  background: white;
  color: var(--secondary-color);
  padding: 1rem 3rem;
  font-weight: 700;
  border-radius: 30px;
  border: none;
  transition: var(--transition);
}

.cta-section .btn-light:hover {
  transform: scale(1.05);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.3);
}

/* Responsive */
@media (max-width: 768px) {
  .hero-section h1 {
    font-size: 2rem;
  }

  .stat-number {
    font-size: 2rem;
  }

  .timeline::before {
    left: 30px;
  }

  .category-card {
    height: 250px;
  }
}

/* Animation */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in-up {
  animation: fadeInUp 0.6s ease-out;
}

/* Loading State */
.loading-skeleton {
  background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
  background-size: 200% 100%;
  animation: loading 1.5s infinite;
}

@keyframes loading {
  0% {
    background-position: 200% 0;
  }
  100% {
    background-position: -200% 0;
  }
}