/* Amazon-Themed Navigation Styles */
.case-study-navigation {
  background: linear-gradient(135deg, #232F3E 0%, #131A22 100%);
  padding: 60px 20px;
  margin-bottom: 40px;
  position: relative;
  overflow: hidden;
}

.case-study-navigation::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="%23ffffff" stroke-width="0.5" opacity="0.1"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
  pointer-events: none;
}

.nav-container {
  max-width: 100%;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.nav-title {
  text-align: center;
  color: #FFFFFF;
  font-size: 2.8rem;
  font-weight: 700;
  margin-bottom: 15px;
  text-shadow: 0 2px 4px rgba(0,0,0,0.3);
  font-family: 'Amazon Ember', 'Helvetica Neue', Arial, sans-serif;
}

.nav-subtitle {
  text-align: center;
  color: #FF9900;
  font-size: 1.2rem;
  font-weight: 500;
  margin-bottom: 40px;
  letter-spacing: 0.5px;
}

.nav-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(320px, 1fr));
  gap: 10px;
  padding: 10px;
  max-width: 1600px;
  margin: 0 auto;
}

.nav-card {
  background: #FFFFFF;
  border-radius: 8px;
  padding: 24px;
  text-decoration: none;
  color: #0F1111;
  display: flex;
  align-items: center;
  gap: 20px;
  transition: all 0.3s ease;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
  border: 1px solid #D5D9D9;
  position: relative;
  overflow: hidden;
}

.nav-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: #FF9900;
  transform: scaleY(0);
  transition: transform 0.3s ease;
}

.nav-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.15);
  border-color: #FF9900;
}

.nav-card:hover::before {
  transform: scaleY(1);
}

.nav-icon {
  flex-shrink: 0;
  width: 56px;
  height: 56px;
  background: linear-gradient(135deg, #FF9900 0%, #FF7700 100%);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 1.6rem;
  box-shadow: 0 4px 12px rgba(255,153,0,0.3);
  transition: all 0.3s ease;
}

.nav-card:hover .nav-icon {
  transform: scale(1.1);
  box-shadow: 0 6px 16px rgba(255,153,0,0.4);
}

.nav-content {
  flex: 1;
}

.nav-content h3 {
  margin: 0 0 8px 0;
  font-size: 1.2rem;
  font-weight: 700;
  color: #0F1111;
  font-family: 'Amazon Ember', 'Helvetica Neue', Arial, sans-serif;
  line-height: 1.3;
}

.nav-content p {
  margin: 0;
  font-size: 0.95rem;
  color: #565959;
  font-weight: 400;
  line-height: 1.4;
}

.nav-badge {
  position: absolute;
  top: 12px;
  right: 12px;
  background: #FF9900;
  color: white;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 4px 8px;
  border-radius: 12px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* Amazon-style grid indicators */
.nav-card:nth-child(1) .nav-badge::after { content: 'Core'; }
.nav-card:nth-child(2) .nav-badge::after { content: 'Analytics'; }
.nav-card:nth-child(3) .nav-badge::after { content: 'Logistics'; }
.nav-card:nth-child(4) .nav-badge::after { content: 'Trust'; }
.nav-card:nth-child(5) .nav-badge::after { content: 'Search'; }
.nav-card:nth-child(6) .nav-badge::after { content: 'Pricing'; }

/* Amazon Prime-style accent for featured cards */
.nav-card.featured {
  background: linear-gradient(135deg, #FFFFFF 0%, #F7F8FA 100%);
  border: 2px solid #FF9900;
}

.nav-card.featured .nav-icon {
  background: linear-gradient(135deg, #232F3E 0%, #131A22 100%);
}

/* Responsive Design */
@media (max-width: 768px) {
  .nav-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  
  .nav-title {
    font-size: 2.2rem;
    margin-bottom: 12px;
  }
  
  .nav-subtitle {
    font-size: 1rem;
    margin-bottom: 30px;
  }
  
  .nav-card {
    padding: 20px;
    gap: 16px;
  }
  
  .nav-icon {
    width: 48px;
    height: 48px;
    font-size: 1.4rem;
  }
  
  .nav-content h3 {
    font-size: 1.1rem;
  }
  
  .nav-content p {
    font-size: 0.9rem;
  }
}

@media (max-width: 480px) {
  .case-study-navigation {
    padding: 40px 16px;
  }
  
  .nav-title {
    font-size: 2rem;
  }
  
  .nav-subtitle {
    font-size: 0.95rem;
  }
  
  .nav-card {
    padding: 16px;
    gap: 12px;
  }
  
  .nav-icon {
    width: 44px;
    height: 44px;
    font-size: 1.3rem;
  }
  
  .nav-content h3 {
    font-size: 1rem;
  }
  
  .nav-content p {
    font-size: 0.85rem;
  }
}

/* Amazon loading animation */
@keyframes amazonPulse {
  0% { opacity: 1; }
  50% { opacity: 0.7; }
  100% { opacity: 1; }
}

.nav-card.loading {
  animation: amazonPulse 1.5s ease-in-out infinite;
}

/* Amazon smile curve accent */
.nav-container::after {
  content: '';
  position: absolute;
  bottom: -20px;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 4px;
  background: #FF9900;
  border-radius: 2px 2px 0 0;
}



/* Footer Styles */
.case-study-footer {
  background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
  color: #e0e0e0;
  padding: 60px 0 30px;
  margin-top: 80px;
  border-top: 3px solid #4a90e2;
  position: relative;
}

.footer-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

.footer-content {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 60px;
  margin-bottom: 40px;
  align-items: start;
}

.footer-section h3 {
  color: #4a90e2;
  font-size: 1.8em;
  margin-bottom: 20px;
  font-weight: 600;
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.footer-section h4 {
  color: #60a5fa;
  font-size: 1.3em;
  margin-bottom: 20px;
  font-weight: 500;
}

.footer-section p {
  line-height: 1.7;
  color: #b0b0b0;
  font-size: 1em;
  margin: 0;
}

.footer-buttons {
  display: flex;
  flex-direction: column;
  gap: 15px;
}

.references-button,
.home-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 24px;
  border-radius: 10px;
  text-decoration: none;
  font-weight: 500;
  transition: all 0.3s ease;
  font-size: 1em;
  text-align: center;
  border: none;
  cursor: pointer;
}

.references-button {
  background: linear-gradient(135deg, #4a90e2, #357abd);
  color: white;
  box-shadow: 0 4px 15px rgba(74, 144, 226, 0.2);
}

.references-button:hover {
  background: linear-gradient(135deg, #357abd, #2968a3);
  transform: translateY(-3px);
  box-shadow: 0 8px 25px rgba(74, 144, 226, 0.4);
  color: white;
  text-decoration: none;
}

.home-button {
  background: transparent;
  color: #c0c0c0;
  border: 2px solid #4a4a4a;
  transition: all 0.3s ease;
}

.home-button:hover {
  background: rgba(74, 144, 226, 0.1);
  border-color: #4a90e2;
  color: #4a90e2;
  text-decoration: none;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(74, 144, 226, 0.15);
}

.references-button i,
.home-button i {
  margin-right: 10px;
  font-size: 1.1em;
}

.footer-divider {
  height: 2px;
  background: linear-gradient(90deg, transparent, #4a90e2, transparent);
  margin-bottom: 25px;
  opacity: 0.7;
}

.footer-bottom {
  text-align: center;
  padding-top: 25px;
}

.footer-bottom p {
  margin: 10px 0;
  color: #888;
  font-size: 0.9em;
  line-height: 1.5;
}

.footer-note {
  font-style: italic;
  color: #666 !important;
  font-size: 0.85em !important;
}

/* Responsive Design */
@media (max-width: 768px) {
  .footer-content {
    grid-template-columns: 1fr;
    gap: 40px;
    text-align: center;
  }
  
  .footer-buttons {
    align-items: center;
  }
  
  .references-button,
  .home-button {
    width: 100%;
    max-width: 300px;
  }
  
  .case-study-footer {
    padding: 40px 0 20px;
    margin-top: 60px;
  }
  
  .footer-section h3 {
    font-size: 1.5em;
  }
  
  .footer-section h4 {
    font-size: 1.2em;
  }
}

@media (max-width: 480px) {
  .footer-container {
    padding: 0 15px;
  }
  
  .footer-content {
    gap: 30px;
  }
  
  .footer-section h3 {
    font-size: 1.4em;
  }
  
  .footer-section p {
    font-size: 0.95em;
  }
  
  .references-button,
  .home-button {
    padding: 12px 20px;
    font-size: 0.95em;
  }
  
  .footer-bottom p {
    font-size: 0.85em;
  }
  
  .footer-note {
    font-size: 0.8em !important;
  }
}

/* Hover effects and animations */
.references-button:active {
  transform: translateY(-1px);
}

.home-button:active {
  transform: translateY(-1px);
}

/* Focus states for accessibility */
.references-button:focus,
.home-button:focus {
  outline: 3px solid rgba(74, 144, 226, 0.5);
  outline-offset: 2px;
}