/* 
 * Main styles for the enhanced website
 * The Future of Higher Education and AI
 */

/* Base styles and variables */
:root {
  /* Primary colors */
  --primary: #1A3A8F;
  --primary-light: #90E0EF;
  --primary-dark: #0D2456;
  
  /* Secondary colors */
  --secondary: #7B2CBF;
  --secondary-light: #C8B6FF;
  --secondary-dark: #5A1A8B;
  
  /* Accent colors */
  --accent: #00B4D8;
  --accent-light: #CAF0F8;
  --accent-dark: #0077B6;
  
  /* Highlight colors */
  --highlight: #FF5A5F;
  --highlight-light: #FFCFD2;
  --highlight-dark: #B23A3E;
  
  /* Neutral colors */
  --white: #FFFFFF;
  --lightest: #F8F9FA;
  --lighter: #E9ECEF;
  --light: #DEE2E6;
  --medium: #CED4DA;
  --dark: #6C757D;
  --darker: #495057;
  --darkest: #343A40;
  --black: #212529;
  
  /* Semantic colors */
  --success: #28A745;
  --info: #17A2B8;
  --warning: #FFC107;
  --danger: #DC3545;
  
  /* Typography */
  --font-primary: 'Roboto', 'Helvetica Neue', Arial, sans-serif;
  --font-secondary: 'Montserrat', 'Helvetica Neue', Arial, sans-serif;
  --font-monospace: 'Roboto Mono', 'Courier New', monospace;
  
  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-xxl: 3rem;
  
  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-default: 0.3s ease;
  --transition-slow: 0.5s ease;
  
  /* Borders */
  --border-radius-sm: 0.125rem;
  --border-radius: 0.25rem;
  --border-radius-lg: 0.5rem;
  --border-radius-xl: 1rem;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

/* Dark mode variables */
.dark-mode {
  --primary: #90E0EF;
  --primary-light: #CAF0F8;
  --primary-dark: #0077B6;
  
  --secondary: #C8B6FF;
  --secondary-light: #E0D4FF;
  --secondary-dark: #7B2CBF;
  
  --white: #212529;
  --lightest: #343A40;
  --lighter: #495057;
  --light: #6C757D;
  --medium: #ADB5BD;
  --dark: #CED4DA;
  --darker: #DEE2E6;
  --darkest: #E9ECEF;
  --black: #F8F9FA;
  
  --bg-color: #212529;
  --text-color: #E9ECEF;
}

/* High contrast mode */
.high-contrast-mode {
  --primary: #FFFFFF;
  --primary-light: #FFFFFF;
  --primary-dark: #FFFFFF;
  
  --secondary: #FFFFFF;
  --secondary-light: #FFFFFF;
  --secondary-dark: #FFFFFF;
  
  --accent: #FFFFFF;
  --accent-light: #FFFFFF;
  --accent-dark: #FFFFFF;
  
  --highlight: #FFFFFF;
  --highlight-light: #FFFFFF;
  --highlight-dark: #FFFFFF;
  
  --white: #000000;
  --lightest: #000000;
  --lighter: #000000;
  --light: #000000;
  --medium: #FFFFFF;
  --dark: #FFFFFF;
  --darker: #FFFFFF;
  --darkest: #FFFFFF;
  --black: #FFFFFF;
  
  --bg-color: #000000;
  --text-color: #FFFFFF;
}

/* Base styles */
body {
  font-family: var(--font-primary);
  color: var(--darkest);
  background-color: var(--white);
  line-height: 1.6;
  transition: background-color var(--transition-default), color var(--transition-default);
}

.dark-mode body {
  background-color: var(--bg-color);
  color: var(--text-color);
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-secondary);
  font-weight: 700;
  margin-bottom: 1rem;
  color: var(--darkest);
}

.dark-mode h1, 
.dark-mode h2, 
.dark-mode h3, 
.dark-mode h4, 
.dark-mode h5, 
.dark-mode h6 {
  color: var(--white);
}

a {
  color: var(--primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--primary-dark);
}

.dark-mode a {
  color: var(--primary-light);
}

.dark-mode a:hover {
  color: var(--white);
}

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

.bg-primary {
  background-color: var(--primary) !important;
}

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

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

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

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

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

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

.dark-mode .btn-outline-primary {
  color: var(--primary-light);
  border-color: var(--primary-light);
}

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

/* Section styles */
.section-padding {
  padding: 5rem 0;
}

.section-header {
  margin-bottom: 3rem;
}

.section-title {
  font-size: 2.5rem;
  margin-bottom: 0.5rem;
  position: relative;
  display: inline-block;
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 50%;
  transform: translateX(-50%);
  width: 80px;
  height: 4px;
  background-color: var(--primary);
}

.section-subtitle {
  font-size: 1.25rem;
  color: var(--dark);
  font-weight: 400;
}

.dark-mode .section-subtitle {
  color: var(--medium);
}

/* Navigation */
.navbar {
  padding: 1rem 0;
  background-color: var(--white);
  box-shadow: var(--shadow);
  transition: background-color var(--transition-default), box-shadow var(--transition-default);
}

.dark-mode .navbar {
  background-color: var(--darkest);
  box-shadow: 0 1px 3px 0 rgba(255, 255, 255, 0.1), 0 1px 2px 0 rgba(255, 255, 255, 0.06);
}

.navbar-brand {
  font-family: var(--font-secondary);
  font-weight: 700;
  font-size: 1.5rem;
}

.nav-link {
  font-weight: 500;
  padding: 0.5rem 1rem !important;
  color: var(--darker) !important;
  position: relative;
  transition: color var(--transition-fast);
}

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

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

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

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

.dark-mode .nav-link {
  color: var(--light) !important;
}

.dark-mode .nav-link:hover,
.dark-mode .nav-link.active {
  color: var(--primary-light) !important;
}

.dark-mode .nav-link::after {
  background-color: var(--primary-light);
}

/* Hero section */
.hero-section {
  padding: 8rem 0;
  background: linear-gradient(135deg, var(--primary-light) 0%, var(--primary) 100%);
  color: var(--white);
  position: relative;
  overflow: hidden;
}

.dark-mode .hero-section {
  background: linear-gradient(135deg, var(--darkest) 0%, var(--primary-dark) 100%);
}

.hero-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: url('data:image/svg+xml;charset=utf8,%3Csvg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1440 320"%3E%3Cpath fill="%23ffffff" fill-opacity="0.05" d="M0,224L48,213.3C96,203,192,181,288,181.3C384,181,480,203,576,224C672,245,768,267,864,261.3C960,256,1056,224,1152,208C1248,192,1344,192,1392,192L1440,192L1440,320L1392,320C1344,320,1248,320,1152,320C1056,320,960,320,864,320C768,320,672,320,576,320C480,320,384,320,288,320C192,320,96,320,48,320L0,320Z"%3E%3C/path%3E%3C/svg%3E');
  background-size: cover;
  background-position: center;
  opacity: 0.8;
}

.hero-section h1 {
  font-size: 3.5rem;
  font-weight: 800;
  margin-bottom: 1.5rem;
  color: var(--white);
}

.hero-section p {
  font-size: 1.25rem;
  margin-bottom: 2rem;
  max-width: 600px;
}

.hero-animation {
  height: 400px;
  position: relative;
}

/* Card styles */
.card {
  border: none;
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-md);
  transition: transform var(--transition-default), box-shadow var(--transition-default);
  overflow: hidden;
  height: 100%;
}

.dark-mode .card {
  background-color: var(--lightest);
  box-shadow: 0 4px 6px -1px rgba(255, 255, 255, 0.1), 0 2px 4px -1px rgba(255, 255, 255, 0.06);
}

.interactive-card {
  cursor: pointer;
}

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

.card-title {
  color: var(--primary);
  margin-bottom: 1rem;
}

.dark-mode .card-title {
  color: var(--primary-light);
}

/* Feature list */
.feature-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.feature-list li {
  display: flex;
  align-items: flex-start;
  margin-bottom: 1.5rem;
}

.feature-list li i {
  font-size: 1.5rem;
  margin-right: 1rem;
  margin-top: 0.25rem;
}

.feature-list li h5 {
  margin-bottom: 0.5rem;
}

/* Chart containers */
.chart-container {
  position: relative;
  height: 350px;
  margin-bottom: 1rem;
}

.chart-citation {
  font-size: 0.8rem;
  color: var(--dark);
  text-align: right;
  margin-top: 0.5rem;
  font-style: italic;
}

.dark-mode .chart-citation {
  color: var(--medium);
}

/* Citation box */
.citation-box {
  background-color: var(--lightest);
  border-left: 3px solid var(--primary);
  padding: 0.75rem 1rem;
  margin-top: 1.5rem;
  border-radius: var(--border-radius);
}

.dark-mode .citation-box {
  background-color: var(--darker);
  border-left: 3px solid var(--primary-light);
}

.citation-text {
  font-size: 0.85rem;
  color: var(--dark);
  margin-bottom: 0;
  font-style: italic;
}

.dark-mode .citation-text {
  color: var(--medium);
}

/* Interactive elements */
.interactive-callout {
  background-color: var(--primary-light);
  border-radius: var(--border-radius-lg);
  padding: 2rem;
  margin-top: 3rem;
  text-align: center;
  box-shadow: var(--shadow-md);
}

.dark-mode .interactive-callout {
  background-color: var(--primary-dark);
}

.interactive-callout h4 {
  color: var(--primary-dark);
  margin-bottom: 1rem;
}

.dark-mode .interactive-callout h4 {
  color: var(--white);
}

.interactive-framework {
  margin: 2rem 0;
}

.framework-node {
  background-color: var(--lightest);
  border-radius: var(--border-radius);
  padding: 1rem;
  margin-bottom: 1rem;
  cursor: pointer;
  transition: background-color var(--transition-fast);
}

.dark-mode .framework-node {
  background-color: var(--darker);
}

.framework-node h5 {
  margin-bottom: 0;
  color: var(--darker);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.dark-mode .framework-node h5 {
  color: var(--light);
}

.framework-node h5::after {
  content: '\f078';
  font-family: 'Font Awesome 5 Free';
  font-weight: 900;
  font-size: 0.8rem;
  transition: transform var(--transition-fast);
}

.framework-node.active h5::after {
  transform: rotate(180deg);
}

.framework-content {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-default);
}

.framework-node.active {
  background-color: var(--white);
  box-shadow: var(--shadow-sm);
}

.dark-mode .framework-node.active {
  background-color: var(--lightest);
}

.framework-node.active h5 {
  color: var(--primary);
}

.dark-mode .framework-node.active h5 {
  color: var(--primary-light);
}

.framework-node.active .framework-content {
  max-height: 500px;
  margin-top: 1rem;
}

/* Implementation roadmap */
.implementation-roadmap {
  position: relative;
  padding-left: 50px;
}

.implementation-roadmap::before {
  content: '';
  position: absolute;
  top: 0;
  left: 20px;
  height: 100%;
  width: 2px;
  background-color: var(--primary-light);
}

.dark-mode .implementation-roadmap::before {
  background-color: var(--primary-dark);
}

.roadmap-phase {
  position: relative;
  margin-bottom: 2rem;
}

.roadmap-phase::before {
  content: '';
  position: absolute;
  top: 0;
  left: -50px;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background-color: var(--white);
  border: 2px solid var(--primary-light);
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background-color var(--transition-default), border-color var(--transition-default);
}

.dark-mode .roadmap-phase::before {
  background-color: var(--darkest);
  border: 2px solid var(--primary-dark);
}

.roadmap-phase.active::before {
  background-color: var(--primary);
  border-color: var(--primary);
}

.dark-mode .roadmap-phase.active::before {
  background-color: var(--primary-dark);
  border-color: var(--primary-light);
}

.roadmap-phase::after {
  content: attr(data-phase);
  position: absolute;
  top: 0;
  left: -50px;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  font-weight: 700;
  z-index: 2;
}

.dark-mode .roadmap-phase::after {
  color: var(--primary-light);
}

.roadmap-phase.active::after {
  color: var(--white);
}

.phase-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
}

.phase-header h4 {
  margin-bottom: 0;
}

.timeline {
  font-size: 0.9rem;
  color: var(--dark);
  font-weight: 500;
}

.dark-mode .timeline {
  color: var(--medium);
}

/* Case studies explorer */
.case-studies-filters {
  margin-bottom: 2rem;
}

.case-study-card .card {
  transition: transform var(--transition-default), box-shadow var(--transition-default);
}

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

/* Citation explorer */
.citation-explorer {
  max-height: 500px;
  overflow-y: auto;
}

.citation-item {
  padding: 1rem;
  border-bottom: 1px solid var(--light);
  transition: background-color var(--transition-fast);
}

.dark-mode .citation-item {
  border-bottom: 1px solid var(--darker);
}

.citation-item:hover {
  background-color: var(--lightest);
}

.dark-mode .citation-item:hover {
  background-color: var(--darker);
}

.citation-item h5 {
  margin-bottom: 0.5rem;
  color: var(--primary);
}

.dark-mode .citation-item h5 {
  color: var(--primary-light);
}

.citation-tags {
  margin-top: 0.5rem;
}

.citation-tags .badge {
  margin-right: 0.5rem;
}

/* Tools explorer */
.tools-explorer {
  max-height: 500px;
  overflow-y: auto;
}

.tool-item {
  padding: 1rem;
  border-bottom: 1px solid var(--light);
  transition: background-color var(--transition-fast);
}

.dark-mode .tool-item {
  border-bottom: 1px solid var(--darker);
}

.tool-item:hover {
  background-color: var(--lightest);
}

.dark-mode .tool-item:hover {
  background-color: var(--darker);
}

.tool-item h5 {
  margin-bottom: 0.5rem;
  color: var(--primary);
}

.dark-mode .tool-item h5 {
  color: var(--primary-light);
}

.tool-examples {
  margin-top: 0.5rem;
  color: var(--dark);
}

.dark-mode .tool-examples {
  color: var(--medium);
}

/* Accessibility controls */
.accessibility-controls {
  position: fixed;
  top: 100px;
  right: 0;
  background-color: var(--white);
  box-shadow: var(--shadow-md);
  border-radius: var(--border-radius) 0 0 var(--border-radius);
  padding: 0.5rem;
  z-index: 1000;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.dark-mode .accessibility-controls {
  background-color: var(--darkest);
  box-shadow: 0 4px 6px -1px rgba(255, 255, 255, 0.1), 0 2px 4px -1px rgba(255, 255, 255, 0.06);
}

.accessibility-controls button {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  background-color: transparent;
  border: 1px solid var(--light);
  border-radius: var(--border-radius);
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

.dark-mode .accessibility-controls button {
  color: var(--primary-light);
  border: 1px solid var(--darker);
}

.accessibility-controls button:hover {
  background-color: var(--primary);
  color: var(--white);
}

.dark-mode .accessibility-controls button:hover {
  background-color: var(--primary-dark);
}

/* Back to top button */
#back-to-top {
  position: fixed;
  bottom: 20px;
  right: 20px;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--primary);
  color: var(--white);
  box-shadow: var(--shadow-md);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-default), visibility var(--transition-default);
  z-index: 1000;
}

#back-to-top.visible {
  opacity: 1;
  visibility: visible;
}

.dark-mode #back-to-top {
  background-color: var(--primary-dark);
  box-shadow: 0 4px 6px -1px rgba(255, 255, 255, 0.1), 0 2px 4px -1px rgba(255, 255, 255, 0.06);
}

/* Footer */
.footer {
  background-color: var(--darkest);
  color: var(--white);
  padding: 4rem 0 2rem;
}

.dark-mode .footer {
  background-color: var(--black);
}

.footer h5 {
  color: var(--white);
  margin-bottom: 1.5rem;
  position: relative;
  padding-bottom: 0.75rem;
}

.footer h5::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 50px;
  height: 2px;
  background-color: var(--primary);
}

.dark-mode .footer h5::after {
  background-color: var(--primary-light);
}

.social-icons a {
  font-size: 1.5rem;
  transition: color var(--transition-fast);
}

.social-icons a:hover {
  color: var(--primary-light) !important;
}

/* Assessment quiz */
.assessment-progress {
  margin-bottom: 2rem;
}

.assessment-question {
  display: none;
}

.assessment-question.active {
  display: block;
}

/* Responsive adjustments */
@media (max-width: 991.98px) {
  .section-padding {
    padding: 4rem 0;
  }
  
  .hero-section {
    padding: 6rem 0;
  }
  
  .hero-section h1 {
    font-size: 2.5rem;
  }
  
  .section-title {
    font-size: 2rem;
  }
  
  .chart-container {
    height: 300px;
  }
}

@media (max-width: 767.98px) {
  .section-padding {
    padding: 3rem 0;
  }
  
  .hero-section {
    padding: 4rem 0;
  }
  
  .hero-section h1 {
    font-size: 2rem;
  }
  
  .section-title {
    font-size: 1.75rem;
  }
  
  .chart-container {
    height: 250px;
  }
  
  .accessibility-controls {
    top: auto;
    bottom: 20px;
    right: 20px;
    flex-direction: row;
    border-radius: var(--border-radius);
  }
}

/* Animation classes */
.fade-in {
  animation: fadeIn 1s ease forwards;
}

.slide-up {
  animation: slideUp 0.8s ease forwards;
}

.slide-in-right {
  animation: slideInRight 0.8s ease forwards;
}

.slide-in-left {
  animation: slideInLeft 0.8s ease forwards;
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

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

@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(50px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateX(-50px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

/* Text size adjustments */
.text-size-larger {
  font-size: 1.1em;
}

.text-size-largest {
  font-size: 1.2em;
}

.text-size-smaller {
  font-size: 0.9em;
}

.text-size-smallest {
  font-size: 0.8em;
}