/* Custom CSS Variables */
:root {
  --primary-color: #1d3557;
  --primary-light: #457b9d;
  --primary-gradient: linear-gradient(135deg, #1d3557, #457b9d);
  --text-gradient: linear-gradient(135deg, #0d6efd, #0dcaf0);
  --secondary-color: #f1faee;
  --accent-color: #e63946;
  --text-dark: #212529;
  --text-muted: #6c757d;
  --background-light: #f8f9fa;
  --shadow-sm: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
  --shadow-md: 0 0.5rem 1rem rgba(0, 0, 0, 0.15);
  --shadow-lg: 0 1rem 3rem rgba(0, 0, 0, 0.175);
  --border-radius: 0.5rem;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Base Styles */
* {
  box-sizing: border-box;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  line-height: 1.6;
  color: var(--text-dark);
  background-color: #fff;
  scroll-behavior: smooth;
}

/* Typography */
.display-1, .display-2, .display-3, .display-4, .display-5 {
  font-weight: 700;
  letter-spacing: -0.025em;
}

.text-gradient {
  background: var(--text-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Navigation */
#mainNav {
  background: var(--primary-color) !important;
  transition: var(--transition);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-sm);
}

.navbar-brand {
  font-size: 1.5rem;
  letter-spacing: -0.025em;
}

.nav-link {
  font-weight: 500;
  transition: var(--transition);
  position: relative;
}

.nav-link:hover {
  transform: translateY(-1px);
}

.nav-link::after {
  content: '';
  position: absolute;
  width: 0;
  height: 2px;
  bottom: -5px;
  left: 50%;
  background: var(--secondary-color);
  transition: var(--transition);
  transform: translateX(-50%);
}

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

/* Hero Section */
.hero-section {
  min-height: 100vh;
  background: var(--primary-gradient);
  position: relative;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.05'%3E%3Ccircle cx='30' cy='30' r='2'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
  animation: float 20s infinite linear;
}

@keyframes float {
  0% { transform: translateY(0px); }
  100% { transform: translateY(-60px); }
}

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

.scroll-indicator {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  color: white;
  opacity: 0.7;
  animation: bounce 2s infinite;
}

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

/* Page Headers */
.page-header {
  padding-top: 8rem;
  margin-top: -76px;
  background: var(--primary-gradient);
}

/* Feature Cards */
.feature-card {
  transition: var(--transition);
  position: relative;
  overflow: hidden;
  border: 1px solid rgba(0, 0, 0, 0.05);
}

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

.feature-pattern {
  position: absolute;
  top: -50%;
  right: -50%;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle, rgba(29, 53, 87, 0.05) 1px, transparent 1px);
  background-size: 20px 20px;
  transform: rotate(45deg);
  pointer-events: none;
}

.feature-icon i {
  transition: var(--transition);
}

.feature-card:hover .feature-icon i {
  transform: scale(1.1);
}

/* Team Section */
.team-image-wrapper {
  position: relative;
  display: inline-block;
}

.team-image {
  width: 200px;
  height: 200px;
  object-fit: cover;
  border: 4px solid white;
  box-shadow: var(--shadow-md);
  transition: var(--transition);
}

.team-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(29, 53, 87, 0.9);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: var(--transition);
}

.team-image-wrapper:hover .team-overlay {
  opacity: 1;
}

.team-social i {
  color: white;
  font-size: 2rem;
}

.team-card {
  transition: var(--transition);
}

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

/* Application Tabs */
.nav-tabs {
  border: none !important;
}

.nav-tabs .nav-link {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 1.1rem;
  padding: 1rem 2rem;
  margin: 0 0.5rem;
  border-radius: var(--border-radius);
  transition: var(--transition);
  position: relative;
}

.nav-tabs .nav-link:hover {
  background: rgba(var(--primary-rgb), 0.1);
  color: var(--primary);
  border: none;
}

.nav-tabs .nav-link.active {
  background: var(--primary);
  color: white;
  border: none;
  box-shadow: var(--shadow-md);
}

.nav-tabs .nav-link.active i {
  color: white !important;
}

.application-info {
  background: rgba(255, 255, 255, 0.8);
  border-radius: var(--border-radius);
}

.application-visual {
  border-radius: var(--border-radius);
  backdrop-filter: blur(10px);
}

.cta-card {
  background: linear-gradient(135deg, var(--accent), #ff6b7a) !important;
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-lg);
}

.tab-content {
  background: rgba(255, 255, 255, 0.5);
  border-radius: var(--border-radius);
  padding: 2rem;
  box-shadow: var(--shadow-sm);
  backdrop-filter: blur(5px);
}

/* Medical Outputs Showcase */
.outputs-showcase {
  background: linear-gradient(135deg, var(--primary), var(--primary-light)) !important;
  box-shadow: var(--shadow-lg);
}

.output-card {
  transition: var(--transition);
  border: none;
  box-shadow: var(--shadow-sm);
}

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

.output-icon i {
  opacity: 0.8;
}

.feature-tag {
  font-size: 0.75rem;
  font-weight: 500;
  display: inline-block;
}

.bg-gradient-primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-light)) !important;
}

/* Icon Boxes */
.icon-circle {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto;
}

.philosophy-item .icon-circle {
  width: 60px;
  height: 60px;
}

/* Forms */
.contact-form-wrapper {
  border: 1px solid rgba(0, 0, 0, 0.05);
}

.form-control, .form-select {
  border: 2px solid #e9ecef;
  transition: var(--transition);
}

.form-control:focus, .form-select:focus {
  border-color: var(--primary-light);
  box-shadow: 0 0 0 0.2rem rgba(69, 123, 157, 0.25);
}

/* Buttons */
.btn {
  font-weight: 500;
  border-radius: var(--border-radius);
  transition: var(--transition);
  text-decoration: none;
  border: 2px solid transparent;
}

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

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

.btn-primary:hover {
  background: var(--primary-light);
  border-color: var(--primary-light);
}

/* Animations */
.animate-fade-up {
  animation: fadeUp 1s ease-out;
}

@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Utility Classes */
.bg-gradient-primary {
  background: var(--primary-gradient) !important;
}

.bg-gradient-success {
  background: linear-gradient(135deg, #198754, #20c997) !important;
}

.bg-gradient-warning {
  background: linear-gradient(135deg, #ffc107, #fd7e14) !important;
}

.bg-gradient-danger {
  background: linear-gradient(135deg, #dc3545, #e63946) !important;
}

.text-light-emphasis {
  color: rgba(255, 255, 255, 0.75) !important;
}

/* Responsive Design */
@media (max-width: 768px) {
  .hero-section {
    min-height: 80vh;
    padding: 2rem 0;
  }
  
  .display-2 {
    font-size: 2.5rem;
  }
  
  .display-3 {
    font-size: 2rem;
  }
  
  .display-4 {
    font-size: 1.75rem;
  }
  
  .team-image {
    width: 150px;
    height: 150px;
  }
  
  .feature-card {
    margin-bottom: 2rem;
  }
}

@media (max-width: 576px) {
  .hero-section {
    min-height: 70vh;
  }
  
  .display-2 {
    font-size: 2rem;
    line-height: 1.2;
  }
  
  .btn-lg {
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
  }
  
  .team-image {
    width: 120px;
    height: 120px;
  }
}

/* Loading States */
.btn:disabled {
  opacity: 0.6;
  transform: none !important;
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  
  .scroll-indicator {
    animation: none;
  }
  
  .hero-bg {
    animation: none;
  }
}

/* Focus Styles */
.btn:focus,
.form-control:focus,
.form-select:focus {
  outline: 2px solid var(--primary-light);
  outline-offset: 2px;
}

/* Demo Showcase Styles */
.demo-showcase {
  position: relative;
}

.video-section {
  position: relative;
}

.video-wrapper {
  position: relative;
  width: 100%;
  height: 0;
  padding-bottom: 56.25%; /* 16:9 aspect ratio */
  overflow: hidden;
  border-radius: 0.75rem;
}

.video-wrapper iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border-radius: 0.75rem;
}

.demo-stat {
  padding: 1rem;
}

.demo-stat i {
  opacity: 0.8;
}

/* Responsive video adjustments */
@media (max-width: 768px) {
  .video-wrapper {
    padding-bottom: 75%; /* More square on mobile */
  }
}

/* Documents Page Styles */
.documents-grid {
  max-width: 100%;
}

.document-card {
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.document-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(0,0,0,0.1) !important;
}

.document-icon {
  position: relative;
}

.document-icon .badge {
  position: absolute;
  bottom: -5px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 0.7rem;
}

.whitepaper-content {
  line-height: 1.7;
  font-size: 1.05rem;
}

.whitepaper-content h3 {
  color: var(--primary);
  margin-top: 2rem;
}

.whitepaper-content h4 {
  color: var(--primary-light);
}

.whitepaper-content section {
  border-bottom: 1px solid #eee;
  padding-bottom: 2rem;
}

.whitepaper-content section:last-child {
  border-bottom: none;
}

.contact-info {
  border-left: 4px solid var(--primary);
}

.demo-section {
  border: 1px solid rgba(13, 110, 253, 0.15);
}

/* Print Styles */
@media print {
  .navbar,
  .scroll-indicator,
  .btn,
  .video-container {
    display: none !important;
  }
  
  .hero-section {
    background: white !important;
    color: black !important;
    min-height: auto !important;
  }
}