/* Enhanced Navigation for AI Medicine Platform */

/* CSS Variables for AI Medicine Theme */
:root {
  --ai-primary: #667eea;
  --ai-secondary: #764ba2;
  --ai-accent: #f093fb;
  --ai-success: #4facfe;
  --ai-warning: #fa709a;
  --ai-danger: #ff9a9e;
  --ai-info: #a8edea;
  
  --ai-gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --ai-gradient-secondary: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
  --ai-gradient-success: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
  --ai-gradient-warning: linear-gradient(135deg, #fa709a 0%, #fee140 100%);
  
  --ai-bg-dark: #0f0f23;
  --ai-bg-darker: #070815;
  --ai-bg-card: #1a1a2e;
  --ai-bg-glass: rgba(255, 255, 255, 0.1);
  --ai-border-glass: rgba(255, 255, 255, 0.2);
  
  --ai-text-primary: #ffffff;
  --ai-text-secondary: #94a3b8;
  --ai-text-muted: #64748b;
  
  --ai-shadow-glow: 0 0 20px rgba(102, 126, 234, 0.3);
  --ai-shadow-card: 0 8px 32px rgba(0, 0, 0, 0.1);
  --ai-transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Enhanced Navigation Bar */
.navbar-ai {
  background: var(--ai-bg-darker) !important;
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--ai-border-glass);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
  padding: 1rem 0;
  min-height: 100px;
  transition: var(--ai-transition);
  z-index: 4000 !important;
  position: relative;
}

.navbar-ai .container {
  max-width: 1400px;
}

/* Brand/Logo Styling */
.navbar-brand-ai {
  display: flex;
  align-items: center;
  text-decoration: none;
  transition: var(--ai-transition);
}

.navbar-brand-ai:hover {
  transform: scale(1.05);
}

.navbar-brand-ai img {
  height: 80px;
  width: auto;
  filter: drop-shadow(0 0 15px rgba(102, 126, 234, 0.4));
  transition: var(--ai-transition);
}

.brand-text {
  margin-left: 16px;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: center;
}

.brand-title {
  font-size: 1.8rem;
  font-weight: 800;
  background: var(--ai-gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin: 0;
  line-height: 1.1;
  letter-spacing: -0.5px;
}

.brand-subtitle {
  font-size: 0.8rem;
  color: var(--ai-text-secondary);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1.2px;
  margin: 2px 0 0 0;
}

/* Navigation Links */
.navbar-nav-ai .nav-link {
  color: var(--ai-text-secondary) !important;
  font-weight: 500;
  padding: 0.75rem 1rem !important;
  border-radius: 8px;
  margin: 0 0.25rem;
  transition: var(--ai-transition);
  position: relative;
  overflow: hidden;
}

.navbar-nav-ai .nav-link::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: var(--ai-gradient-primary);
  opacity: 0;
  transition: var(--ai-transition);
  z-index: -1;
}

.navbar-nav-ai .nav-link:hover::before {
  left: 0;
  opacity: 0.1;
}

.navbar-nav-ai .nav-link:hover {
  color: var(--ai-text-primary) !important;
  transform: translateY(-2px);
}

.navbar-nav-ai .nav-link.active {
  background: var(--ai-gradient-primary);
  color: white !important;
  box-shadow: var(--ai-shadow-glow);
}

/* AI Status Indicator */
.ai-status-indicator {
  display: flex;
  align-items: center;
  padding: 0.5rem 1rem;
  background: var(--ai-bg-glass);
  border-radius: 20px;
  border: 1px solid var(--ai-border-glass);
  backdrop-filter: blur(10px);
  margin: 0 1rem;
}

.ai-status-dot {
  width: 8px;
  height: 8px;
  background: var(--ai-gradient-success);
  border-radius: 50%;
  margin-right: 0.5rem;
  animation: ai-pulse 2s infinite;
}

@keyframes ai-pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.7; transform: scale(1.2); }
}

.ai-status-text {
  font-size: 0.8rem;
  color: var(--ai-text-secondary);
  font-weight: 500;
}

/* Credit Display Enhancement */
.credit-display-ai {
  display: flex;
  align-items: center;
  padding: 0.5rem 1rem;
  background: var(--ai-gradient-warning);
  border-radius: 20px;
  color: white;
  font-weight: 600;
  box-shadow: 0 4px 12px rgba(250, 112, 154, 0.3);
  transition: var(--ai-transition);
}

.credit-display-ai:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(250, 112, 154, 0.4);
}

.credit-icon {
  margin-right: 0.5rem;
  font-size: 1.1rem;
}

/* Dropdown Enhancements */
.dropdown-menu-ai,
.dropdown-menu {
  z-index: 5000 !important;
  position: absolute !important;
  background: var(--ai-bg-card);
  border: 1px solid var(--ai-border-glass);
  border-radius: 12px;
  backdrop-filter: blur(20px);
  box-shadow: 0 8px 32px rgba(0,0,0,0.35);
  padding: 0.5rem 0;
  margin-top: 0.5rem;
  min-width: 160px;
}

/* Ensure dropdown parent has proper positioning */
.navbar .dropdown {
  position: relative;
  z-index: 5000 !important;
}

.dropdown-item-ai {
  color: var(--ai-text-secondary);
  padding: 0.75rem 1.5rem;
  transition: var(--ai-transition);
  border-radius: 8px;
  margin: 0 0.5rem;
}

.dropdown-item-ai:hover {
  background: var(--ai-gradient-primary);
  color: white;
  transform: translateX(5px);
}

.dropdown-item-ai.active {
  background: var(--ai-gradient-primary);
  color: white;
}

/* Mobile Navigation */
.navbar-toggler-ai {
  border: none;
  padding: 0.5rem;
  border-radius: 8px;
  background: var(--ai-bg-glass);
  border: 1px solid var(--ai-border-glass);
}

.navbar-toggler-ai:focus {
  box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.25);
}

.navbar-toggler-icon-ai {
  background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba%28255, 255, 255, 0.7%29' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
}

/* Enhanced Layout Container */
.container-ai {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 1rem;
}

/* Main Content Area */
.main-content-ai {
  min-height: calc(100vh - 200px);
  padding: 2rem 0;
  background: linear-gradient(135deg, var(--ai-bg-dark) 0%, var(--ai-bg-darker) 100%);
}

/* Enhanced Footer */
.footer-ai {
  background: var(--ai-bg-darker);
  border-top: 1px solid var(--ai-border-glass);
  padding: 2rem 0;
  backdrop-filter: blur(20px);
}

.footer-content-ai {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-brand-ai {
  display: flex;
  align-items: center;
}

.footer-brand-ai img {
  height: 80px;
  filter: drop-shadow(0 0 10px rgba(102, 126, 234, 0.3));
}

.footer-text-ai {
  color: var(--ai-text-secondary);
  font-size: 0.9rem;
}

.footer-links-ai {
  display: flex;
  gap: 2rem;
  align-items: center;
}

.footer-link-ai {
  color: var(--ai-text-secondary);
  text-decoration: none;
  transition: var(--ai-transition);
  font-size: 0.9rem;
}

.footer-link-ai:hover {
  color: var(--ai-text-primary);
  transform: translateY(-2px);
}

/* Enhanced Hero Section */
.hero-section-ai {
  background: linear-gradient(135deg, var(--ai-bg-dark) 0%, var(--ai-bg-darker) 100%);
  position: relative;
  overflow: hidden;
  padding: 3rem 0 2rem 0;
}

.hero-section-ai::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(circle at 30% 20%, rgba(102, 126, 234, 0.1) 0%, transparent 50%),
              radial-gradient(circle at 70% 80%, rgba(240, 147, 251, 0.1) 0%, transparent 50%);
  pointer-events: none;
}

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

.hero-badge {
  display: inline-block;
}

.hero-title-ai {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 700;
  line-height: 1.2;
  color: var(--ai-text-primary);
  margin-bottom: 1rem;
}

.hero-subtitle-ai {
  font-size: 1rem;
  color: var(--ai-text-secondary);
  line-height: 1.5;
  margin-bottom: 1.5rem;
  max-width: 90%;
}

.hero-features-ai {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}

.feature-item-ai {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--ai-text-secondary);
  font-weight: 500;
}

.feature-item-ai i {
  font-size: 1.1rem;
  width: 20px;
}

.hero-buttons-ai {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.hero-visual-ai {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 300px;
}

.ai-brain-container {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
}

.ai-brain-glow {
  position: absolute;
  width: 150px;
  height: 150px;
  background: var(--ai-gradient-primary);
  border-radius: 50%;
  filter: blur(30px);
  opacity: 0.2;
  animation: brain-glow 4s ease-in-out infinite alternate;
}

@keyframes brain-glow {
  0% { transform: scale(1); opacity: 0.3; }
  100% { transform: scale(1.2); opacity: 0.5; }
}

.ai-brain-icon {
  font-size: 6rem;
  color: var(--ai-primary);
  z-index: 2;
  position: relative;
  animation: brain-float 4s ease-in-out infinite;
}

@keyframes brain-float {
  0%, 100% { transform: translateY(0px); }
  50% { transform: translateY(-20px); }
}

.ai-particles {
  position: absolute;
  width: 100%;
  height: 100%;
}

.particle {
  position: absolute;
  width: 4px;
  height: 4px;
  background: var(--ai-accent);
  border-radius: 50%;
  animation: particle-float 6s linear infinite;
}

.particle:nth-child(1) { top: 20%; left: 20%; animation-delay: 0s; }
.particle:nth-child(2) { top: 60%; left: 80%; animation-delay: 1s; }
.particle:nth-child(3) { top: 80%; left: 30%; animation-delay: 2s; }
.particle:nth-child(4) { top: 30%; left: 70%; animation-delay: 3s; }
.particle:nth-child(5) { top: 70%; left: 60%; animation-delay: 4s; }

@keyframes particle-float {
  0% { transform: translateY(0px) scale(0); opacity: 0; }
  50% { opacity: 1; }
  100% { transform: translateY(-100px) scale(1); opacity: 0; }
}

.medical-icons {
  position: absolute;
  display: flex;
  gap: 2rem;
  bottom: 2rem;
}

.medical-icon {
  width: 60px;
  height: 60px;
  background: var(--ai-bg-glass);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  backdrop-filter: blur(10px);
  border: 1px solid var(--ai-border-glass);
  animation: icon-bounce 2s ease-in-out infinite;
}

.medical-icon:nth-child(1) { animation-delay: 0s; }
.medical-icon:nth-child(2) { animation-delay: 0.5s; }
.medical-icon:nth-child(3) { animation-delay: 1s; }

.medical-icon i {
  font-size: 1.5rem;
  color: var(--ai-text-primary);
}

@keyframes icon-bounce {
  0%, 100% { transform: translateY(0px); }
  50% { transform: translateY(-10px); }
}

/* AI Capabilities Section */
.ai-capabilities {
  background: var(--ai-bg-card);
  position: relative;
}

.section-title-ai {
  font-size: 2rem;
  font-weight: 700;
  color: var(--ai-text-primary);
  margin-bottom: 0.75rem;
}

.section-subtitle-ai {
  font-size: 1rem;
  color: var(--ai-text-secondary);
  max-width: 500px;
  margin: 0 auto;
}

.capability-card-ai {
  padding: 2rem;
  text-align: center;
  height: 100%;
  transition: var(--ai-transition);
}

.capability-icon-ai {
  width: 80px;
  height: 80px;
  background: var(--ai-gradient-primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1.5rem;
  font-size: 2rem;
  color: white;
}

.capability-card-ai h4 {
  color: var(--ai-text-primary);
  font-weight: 700;
  margin-bottom: 1rem;
}

.capability-card-ai p {
  color: var(--ai-text-secondary);
  line-height: 1.6;
}

/* Platform Statistics */
.platform-stats {
  background: var(--ai-bg-dark);
}

.stat-card-ai {
  padding: 2rem 1rem;
  height: 100%;
  transition: var(--ai-transition);
}

.stat-icon-ai {
  width: 60px;
  height: 60px;
  background: var(--ai-gradient-secondary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1rem;
  font-size: 1.5rem;
  color: white;
}

.stat-number-ai {
  color: var(--ai-text-primary);
  font-weight: 700;
  font-size: 1.2rem;
  margin-bottom: 0.5rem;
}

.stat-description-ai {
  color: var(--ai-text-secondary);
  font-size: 0.9rem;
  margin: 0;
}

/* Quick Access Section */
.quick-access {
  background: var(--ai-bg-card);
}

.quick-access-card-ai {
  text-align: center;
}

.quick-access-card-ai h3 {
  color: var(--ai-text-primary);
  font-weight: 700;
}

/* Responsive Design */
@media (max-width: 991.98px) {
  .navbar-ai {
    padding: 0.875rem 0;
    min-height: 90px;
  }
  
  .navbar-brand-ai img {
    height: 70px;
  }
  
  .brand-title {
    font-size: 1.6rem;
  }
  
  .brand-subtitle {
    font-size: 0.75rem;
  }
  
  .navbar-nav-ai {
    padding: 1rem 0;
  }
  
  .navbar-nav-ai .nav-link {
    margin: 0.25rem 0;
    padding: 1rem !important;
  }
  
  .ai-status-indicator,
  .credit-display-ai {
    margin: 0.5rem 0;
    justify-content: center;
  }
  
  .footer-content-ai {
    flex-direction: column;
    text-align: center;
  }
  
  .footer-links-ai {
    justify-content: center;
  }
  
  .hero-visual-ai {
    min-height: 250px;
    margin-top: 1.5rem;
  }
  
  .ai-brain-icon {
    font-size: 4.5rem;
  }
  
  .medical-icons {
    position: relative;
    bottom: auto;
    justify-content: center;
    margin-top: 2rem;
  }
}

@media (max-width: 767.98px) {
  .navbar-ai {
    padding: 0.75rem 0;
    min-height: 80px;
  }
  
  .brand-text {
    display: none;
  }
  
  .navbar-brand-ai img {
    height: 60px;
  }
  
  .footer-links-ai {
    flex-direction: column;
    gap: 1rem;
  }
  
  .hero-section-ai {
    padding: 2rem 0 1.5rem 0;
  }
  
  .hero-title-ai {
    font-size: 1.8rem;
  }
  
  .hero-subtitle-ai {
    font-size: 0.9rem;
  }
  
  .hero-buttons-ai {
    flex-direction: column;
  }
  
  .ai-brain-icon {
    font-size: 3.5rem;
  }
  
  .medical-icon {
    width: 50px;
    height: 50px;
  }
  
  .medical-icon i {
    font-size: 1.2rem;
  }
}

/* Animation Classes */
.nav-fade-in {
  animation: navFadeIn 0.6s ease-out;
}

@keyframes navFadeIn {
  from {
    opacity: 0;
    transform: translateY(-20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Glassmorphism Effects */
.glass-nav {
  background: var(--ai-bg-glass);
  backdrop-filter: blur(20px);
  border: 1px solid var(--ai-border-glass);
}

/* Utility Classes */
.text-gradient-ai {
  background: var(--ai-gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.bg-gradient-ai {
  background: var(--ai-gradient-primary);
}

.shadow-glow-ai {
  box-shadow: var(--ai-shadow-glow);
}

.hover-lift-ai {
  transition: var(--ai-transition);
}

.hover-lift-ai:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.15);
}

/* Ensure hero section and its children are always below dropdowns */
.hero-section-ai,
.hero-section-ai * {
  z-index: 1 !important;
}

.language-float-btn {
  position: fixed !important;
  top: 24px !important;
  right: 32px !important;
  left: auto !important;
  margin: 0 !important;
  width: auto !important;
  min-width: 120px;
  max-width: 200px;
  z-index: 4000 !important;
  background: var(--ai-bg-card);
  border-radius: 12px;
  box-shadow: 0 4px 16px rgba(0,0,0,0.15);
  padding: 0.25rem 1rem;
  display: flex;
  align-items: center;
}
.language-float-btn .dropdown-menu-ai {
  right: 0 !important;
  left: auto !important;
  top: 110% !important;
}
@media (max-width: 767px) {
  .language-float-btn {
    top: 12px;
    right: 8px;
    min-width: 90px;
    padding: 0.25rem 0.5rem;
  }
}