/* Portal de Disciplinas - Estilos Específicos */
/* Performance Optimizations */

/* Enable hardware acceleration and optimize rendering */
* {
  box-sizing: border-box;
}

html {
  /* Optimize font rendering */
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  
  /* Enable smooth scrolling */
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  
  /* Performance optimizations */
  transform: translateZ(0);
  backface-visibility: hidden;
  -webkit-overflow-scrolling: touch;
  
  /* Optimize repaints */
  will-change: scroll-position;
}

/* Skip Link para Acessibilidade */
.skip-link {
  position: absolute;
  top: -40px;
  left: 6px;
  background: var(--color-primary);
  color: var(--color-btn-primary-text);
  padding: var(--space-8) var(--space-16);
  text-decoration: none;
  border-radius: var(--radius-base);
  font-weight: var(--font-weight-semibold);
  z-index: 1000;
  transition: top var(--duration-fast) var(--ease-standard);
}

.skip-link:focus {
  top: 6px;
}

.main-content {
  flex: 1;
  padding: var(--space-24) 0;
}

/* Header */
.header {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-card-border);
  padding: var(--space-20) 0;
  box-shadow: var(--shadow-sm);
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-16);
}

.logo-section {
  display: flex;
  align-items: center;
  gap: var(--space-20);
}

.school-logos {
  display: flex;
  align-items: center;
  gap: var(--space-12);
}

.school-logo,
.course-logo {
  height: 60px;
  width: auto;
  border-radius: var(--radius-base);
  border: 2px solid var(--color-primary);
  padding: var(--space-4);
  background: var(--color-bg-1);
  transition: transform var(--duration-normal) var(--ease-standard);
}

.school-logo:hover,
.course-logo:hover {
  transform: scale(1.05);
}

.logo-text h1 {
  color: var(--color-primary);
  font-size: var(--font-size-2xl);
  margin-bottom: var(--space-4);
  font-weight: var(--font-weight-bold);
}

.school-name {
  color: var(--color-text);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-semibold);
  margin: 0 0 var(--space-2) 0;
}

.school-subtitle {
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
  margin: 0;
  font-style: italic;
}

.header-info {
  display: flex;
  gap: var(--space-24);
  align-items: center;
}

.contact-info,
.additional-info {
  display: flex;
  align-items: center;
  gap: var(--space-12);
}

.contact-icon,
.info-icon {
  font-size: var(--font-size-2xl);
  background: var(--color-bg-3);
  width: 45px;
  height: 45px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  border: 2px solid var(--color-success);
}

.info-icon {
  background: var(--color-bg-2);
  border-color: var(--color-warning);
}

.contact-details,
.info-details {
  display: flex;
  flex-direction: column;
}

.contact-label,
.info-label {
  font-weight: var(--font-weight-semibold);
  color: var(--color-text);
  font-size: var(--font-size-sm);
}

.contact-value,
.info-value {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  font-weight: var(--font-weight-medium);
  text-decoration: none;
  transition: color var(--duration-fast) var(--ease-standard);
}

.contact-value:hover,
.info-value:hover {
  color: var(--color-primary);
  text-decoration: underline;
}

.contact-value:focus-visible,
.info-value:focus-visible {
  outline: var(--focus-outline);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

/* Breadcrumb */
.breadcrumb {
  margin-bottom: var(--space-12);
}

.breadcrumb-list {
  display: flex;
  align-items: center;
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: var(--font-size-sm);
}

.breadcrumb-item {
  display: flex;
  align-items: center;
}

.breadcrumb-link {
  color: var(--color-text-secondary);
  text-decoration: none;
  transition: color var(--duration-fast) var(--ease-standard);
}

.breadcrumb-link:hover {
  color: var(--color-primary);
}

.breadcrumb-separator {
  margin: 0 var(--space-8);
  color: var(--color-text-secondary);
  font-weight: var(--font-weight-bold);
}

.breadcrumb-current {
  color: var(--color-text);
  font-weight: var(--font-weight-medium);
}

/* Header Navigation */
.header-nav {
  border-top: 1px solid var(--color-card-border-inner);
  padding-top: var(--space-16);
}

.nav-links {
  display: flex;
  gap: var(--space-20);
  justify-content: center;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: var(--space-8);
  padding: var(--space-8) var(--space-16);
  border-radius: var(--radius-base);
  color: var(--color-text-secondary);
  text-decoration: none;
  transition: all var(--duration-normal) var(--ease-standard);
  border: 1px solid transparent;
}

.nav-link:hover {
  color: var(--color-primary);
  background: var(--color-bg-1);
  border-color: var(--color-primary);
  transform: translateY(-2px);
}

.nav-link:focus-visible {
  outline: var(--focus-outline);
  outline-offset: 2px;
}

.nav-icon {
  font-size: var(--font-size-lg);
}

.nav-text {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
}

/* Seção de Busca e Filtros */
.search-filter-section {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: var(--space-24);
  margin-bottom: var(--space-32);
  border: 1px solid var(--color-card-border);
}

.search-bar {
  margin-bottom: var(--space-16);
  position: relative;
}

.search-bar input {
  font-size: var(--font-size-lg);
  padding: var(--space-12) var(--space-16);
  transition: all var(--duration-normal) var(--ease-standard);
}

.search-bar input.search-active {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(var(--color-primary-rgb), 0.1);
}

.search-focused {
  transform: scale(1.01);
}

.search-highlight {
  background: var(--color-warning);
  color: var(--color-text);
  padding: 1px 2px;
  border-radius: 2px;
  font-weight: var(--font-weight-semibold);
}

/* Screen reader only content */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Accessibility Enhancements */

/* Focus indicators - visible and consistent */
*:focus-visible {
  outline: 3px solid var(--color-primary);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

/* High contrast focus for buttons */
.btn:focus-visible {
  outline: 3px solid var(--color-primary);
  outline-offset: 3px;
  box-shadow: 0 0 0 1px var(--color-surface), 0 0 0 4px var(--color-primary);
}

/* Focus for cards */
.discipline-card:focus-visible {
  outline: 3px solid var(--color-primary);
  outline-offset: 2px;
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg), 0 0 0 3px var(--color-primary);
}

/* Focus for form controls */
.form-control:focus-visible {
  outline: 3px solid var(--color-primary);
  outline-offset: 2px;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(var(--color-primary-rgb), 0.2);
}

/* Focus for links */
a:focus-visible {
  outline: 3px solid var(--color-primary);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
  text-decoration: underline;
}

/* Skip link improvements */
.skip-link:focus {
  top: 6px;
  z-index: 9999;
  box-shadow: var(--shadow-xl);
  border: 2px solid var(--color-surface);
}

/* Keyboard navigation indicators */
.keyboard-navigation-active .discipline-card:focus {
  outline: 3px solid var(--color-primary);
  outline-offset: 2px;
  transform: translateY(-2px);
}

/* High contrast mode support */
@media (prefers-contrast: high) {
  .discipline-card {
    border: 2px solid var(--color-text);
  }
  
  .btn {
    border: 2px solid var(--color-text);
  }
  
  .status {
    border: 1px solid var(--color-text);
  }
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  
  .discipline-card:hover {
    transform: none;
  }
  
  .loading-spinner {
    animation: none;
  }
  
  .pulse {
    animation: none;
  }
}

/* Screen reader announcements */
.sr-announcer {
  position: absolute;
  left: -10000px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

/* Improved color contrast for text */
.discipline-card .meta-value {
  color: var(--color-text);
  font-weight: var(--font-weight-semibold);
}

.discipline-professor .professor-name {
  color: var(--color-text-secondary);
  font-weight: var(--font-weight-medium);
}

/* Better visual hierarchy for headings */
h1, h2, h3, h4, h5, h6 {
  color: var(--color-text);
  font-weight: var(--font-weight-bold);
}

/* Improved button states for accessibility */
.btn:disabled,
.btn[aria-disabled="true"] {
  opacity: 0.6;
  cursor: not-allowed;
  pointer-events: none;
}

.btn:disabled:focus,
.btn[aria-disabled="true"]:focus {
  outline: 2px solid var(--color-text-secondary);
}

/* Modal accessibility improvements */
.modal[aria-hidden="true"] {
  display: none;
}

.modal[aria-hidden="false"] {
  display: flex;
}

/* Focus trap indicator */
.focus-trap-active {
  position: relative;
}

.focus-trap-active::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  pointer-events: none;
  border: 3px solid var(--color-primary);
  z-index: 999;
  opacity: 0.3;
}

/* Keyboard navigation help */
.keyboard-help {
  position: fixed;
  bottom: 20px;
  right: 20px;
  background: var(--color-surface);
  border: 2px solid var(--color-primary);
  border-radius: var(--radius-lg);
  padding: var(--space-16);
  box-shadow: var(--shadow-xl);
  z-index: 1000;
  max-width: 300px;
  font-size: var(--font-size-sm);
  opacity: 0;
  transform: translateY(20px);
  transition: all var(--duration-normal) var(--ease-standard);
  pointer-events: none;
}

.keyboard-help.visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.keyboard-help h4 {
  margin: 0 0 var(--space-8) 0;
  color: var(--color-primary);
  font-size: var(--font-size-base);
}

.keyboard-help ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.keyboard-help li {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-4) 0;
  border-bottom: 1px solid var(--color-card-border-inner);
}

.keyboard-help li:last-child {
  border-bottom: none;
}

.keyboard-help .key {
  background: var(--color-secondary);
  padding: var(--space-2) var(--space-6);
  border-radius: var(--radius-sm);
  font-family: monospace;
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-bold);
}

/* Loading state accessibility */
.loading-state[aria-busy="true"] {
  position: relative;
}

.loading-state[aria-busy="true"]::after {
  content: 'Carregando disciplinas...';
  position: absolute;
  left: -10000px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

/* Error state accessibility */
.error-state {
  background: rgba(var(--color-error-rgb), 0.1);
  border: 2px solid var(--color-error);
  border-radius: var(--radius-lg);
  padding: var(--space-20);
  text-align: center;
  color: var(--color-error);
}

.error-state h3 {
  color: var(--color-error);
  margin-bottom: var(--space-12);
}

/* Status indicators with better contrast */
.status--success {
  background: rgba(var(--color-success-rgb), 0.15);
  color: var(--color-success);
  border: 1px solid var(--color-success);
}

.status--warning {
  background: rgba(var(--color-warning-rgb), 0.15);
  color: var(--color-warning);
  border: 1px solid var(--color-warning);
}

.status--error {
  background: rgba(var(--color-error-rgb), 0.15);
  color: var(--color-error);
  border: 1px solid var(--color-error);
}

.filters {
  display: flex;
  gap: var(--space-16);
  margin-bottom: var(--space-16);
  flex-wrap: wrap;
}

.filters select {
  min-width: 150px;
}

.filters select:focus,
.filters select:active {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(var(--color-primary-rgb), 0.1);
}

#clear-filters.filters-active {
  background: var(--color-warning);
  border-color: var(--color-warning);
  color: var(--color-text);
}

#clear-filters.filters-active:hover {
  background: var(--color-warning);
  opacity: 0.9;
  transform: translateY(-1px);
}

#clear-filters:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.results-counter {
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
}

/* Grade de Disciplinas - Performance Optimized */
.disciplines-grid-section {
  min-height: 400px;
  position: relative;
  /* Enable hardware acceleration */
  transform: translateZ(0);
  backface-visibility: hidden;
  perspective: 1000px;
  
  /* Optimize for large content changes */
  contain: layout style paint;
  will-change: contents;
}

/* Lazy loading optimizations */
.disciplines-grid-section.loading {
  pointer-events: none;
}

.disciplines-grid-section.loading .disciplines-grid {
  opacity: 0.7;
  transition: opacity 0.3s ease;
}

.disciplines-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: var(--space-24);
  align-items: start;
  /* Performance optimizations */
  contain: layout style;
  will-change: contents;
  /* Smooth transitions for dynamic content */
  transition: opacity var(--duration-normal) var(--ease-standard);
}

/* Dynamic grid sizing based on content */
.disciplines-grid--small {
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-20);
}

.disciplines-grid--large {
  grid-template-columns: repeat(auto-fill, minmax(360px, 1fr));
  gap: var(--space-32);
}

/* Grid container for better performance */
.disciplines-grid-container {
  /* Enable GPU acceleration for smooth scrolling */
  transform: translate3d(0, 0, 0);
  -webkit-overflow-scrolling: touch;
  position: relative;
}

/* Responsive Grid Breakpoints - Optimized */
/* Use container queries when supported for better performance */
@supports (container-type: inline-size) {
  .disciplines-grid-container {
    container-type: inline-size;
  }
  
  @container (min-width: 1400px) {
    .disciplines-grid {
      grid-template-columns: repeat(4, 1fr);
      max-width: 1400px;
      margin: 0 auto;
    }
  }
  
  @container (min-width: 1024px) and (max-width: 1399px) {
    .disciplines-grid {
      grid-template-columns: repeat(3, 1fr);
    }
  }
  
  @container (min-width: 768px) and (max-width: 1023px) {
    .disciplines-grid {
      grid-template-columns: repeat(2, 1fr);
      gap: var(--space-20);
    }
  }
  
  @container (min-width: 640px) and (max-width: 767px) {
    .disciplines-grid {
      grid-template-columns: repeat(2, 1fr);
      gap: var(--space-16);
    }
  }
  
  @container (max-width: 639px) {
    .disciplines-grid {
      grid-template-columns: 1fr;
      gap: var(--space-16);
    }
  }
}

/* Fallback for browsers without container query support */
@supports not (container-type: inline-size) {
  @media (min-width: 1400px) {
    .disciplines-grid {
      grid-template-columns: repeat(4, 1fr);
      max-width: 1400px;
      margin: 0 auto;
    }
  }

  @media (min-width: 1024px) and (max-width: 1399px) {
    .disciplines-grid {
      grid-template-columns: repeat(3, 1fr);
    }
  }

  @media (min-width: 768px) and (max-width: 1023px) {
    .disciplines-grid {
      grid-template-columns: repeat(2, 1fr);
      gap: var(--space-20);
    }
  }

  @media (min-width: 640px) and (max-width: 767px) {
    .disciplines-grid {
      grid-template-columns: repeat(2, 1fr);
      gap: var(--space-16);
    }
  }

  @media (max-width: 639px) {
    .disciplines-grid {
      grid-template-columns: 1fr;
      gap: var(--space-16);
    }
  }
}

/* Additional responsive optimizations */
@media (max-width: 480px) {
  .disciplines-grid {
    padding: 0 var(--space-8);
  }
  
  .discipline-card {
    padding: var(--space-16);
  }
  
  .discipline-header {
    gap: var(--space-8);
  }
  
  .discipline-icon {
    width: 40px;
    height: 40px;
    font-size: var(--font-size-2xl);
  }
}

/* High DPI display optimizations */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
  .discipline-icon,
  .school-logo,
  .course-logo {
    image-rendering: -webkit-optimize-contrast;
    image-rendering: crisp-edges;
  }
}

/* Card de Disciplina */
.discipline-card {
  background: var(--color-surface);
  border: 1px solid var(--color-card-border);
  border-radius: var(--radius-lg);
  padding: var(--space-20);
  transition: all var(--duration-normal) var(--ease-standard);
  cursor: pointer;
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  height: 100%;
  /* Performance optimizations */
  contain: layout style paint;
  will-change: transform, box-shadow;
  backface-visibility: hidden;
  transform: translateZ(0);
}

.discipline-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-primary);
}

.discipline-card:focus-visible {
  outline: var(--focus-outline);
  outline-offset: 2px;
}

.discipline-card--featured {
  border: 2px solid var(--color-primary);
  background: var(--color-bg-1);
  position: relative;
}

.discipline-card--featured::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-primary-hover));
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}

.discipline-card--unavailable {
  opacity: 0.7;
  cursor: not-allowed;
  filter: grayscale(0.3);
}

.discipline-card--unavailable:hover {
  transform: none;
  box-shadow: var(--shadow-sm);
  border-color: var(--color-card-border);
}

.discipline-featured-badge {
  position: absolute;
  top: var(--space-12);
  right: var(--space-12);
  background: var(--color-primary);
  color: var(--color-btn-primary-text);
  width: 32px;
  height: 32px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-lg);
  z-index: 2;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.1); }
}

.discipline-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, transparent 0%, rgba(var(--color-primary-rgb, 33, 128, 141), 0.05) 100%);
  opacity: 0;
  transition: opacity var(--duration-normal) var(--ease-standard);
  pointer-events: none;
}

.discipline-card:hover .discipline-overlay {
  opacity: 1;
}

.discipline-header {
  display: flex;
  align-items: flex-start;
  gap: var(--space-12);
  margin-bottom: var(--space-16);
  position: relative;
}

.discipline-icon {
  font-size: var(--font-size-3xl);
  width: 50px;
  height: 50px;
  border-radius: var(--radius-base);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  border: 2px solid rgba(255, 255, 255, 0.2);
  transition: all var(--duration-normal) var(--ease-standard);
  position: relative;
  overflow: hidden;
}

.discipline-icon::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: inherit;
  opacity: 0.8;
  z-index: -1;
}

.discipline-card:hover .discipline-icon {
  transform: scale(1.1);
  border-color: rgba(255, 255, 255, 0.4);
}

.discipline-info {
  flex: 1;
  min-width: 0; /* Permite truncamento de texto */
}

.discipline-name {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text);
  margin-bottom: var(--space-4);
  line-height: var(--line-height-tight);
  transition: color var(--duration-fast) var(--ease-standard);
}

.discipline-card:hover .discipline-name {
  color: var(--color-primary);
}

.discipline-professor {
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
  margin-bottom: var(--space-8);
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.professor-icon {
  flex-shrink: 0;
}

.professor-name {
  transition: color var(--duration-fast) var(--ease-standard);
}

.discipline-card:hover .professor-name {
  color: var(--color-text);
}

.discipline-meta {
  display: flex;
  gap: var(--space-12);
  margin-bottom: var(--space-16);
  flex-wrap: wrap;
}

.meta-item {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  padding: var(--space-4) var(--space-8);
  background: var(--color-secondary);
  border-radius: var(--radius-sm);
  transition: all var(--duration-fast) var(--ease-standard);
}

.discipline-card:hover .meta-item {
  background: var(--color-secondary-hover);
  color: var(--color-text);
}

.meta-icon {
  flex-shrink: 0;
}

.meta-value {
  font-weight: var(--font-weight-medium);
}

.discipline-status {
  margin-bottom: var(--space-16);
  display: flex;
  gap: var(--space-8);
  flex-wrap: wrap;
  align-items: center;
}

.featured-status {
  animation: shimmer 2s infinite;
}

@keyframes shimmer {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.7; }
}

.discipline-actions {
  display: flex;
  gap: var(--space-8);
  margin-top: auto; /* Push to bottom of card */
}

.discipline-actions .btn {
  flex: 1;
  position: relative;
  overflow: hidden;
}

.details-btn {
  transition: all var(--duration-normal) var(--ease-standard);
}

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

.access-btn {
  font-weight: var(--font-weight-semibold);
}

.btn--warning {
  background: rgba(var(--color-warning-rgb), 0.1);
  border-color: var(--color-warning);
  color: var(--color-warning);
}

.btn--disabled {
  background: var(--color-secondary);
  border-color: var(--color-border);
  color: var(--color-text-secondary);
}

/* Lazy Loading and Performance Animations */
.discipline-card {
  /* Default state for lazy loading */
  opacity: 1;
  transform: translateY(0);
  transition: opacity 0.3s ease, transform 0.3s ease;
}

/* Loading state for cards */
.discipline-card--loading {
  opacity: 0;
  transform: translateY(20px);
  pointer-events: none;
}

/* Visible state after lazy loading */
.discipline-card--visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

/* Lazy loading placeholder */
.discipline-card--lazy {
  background: linear-gradient(90deg, 
    var(--color-secondary) 25%, 
    rgba(var(--color-brown-600-rgb), 0.08) 50%, 
    var(--color-secondary) 75%);
  background-size: 200% 100%;
  animation: shimmerLoading 1.5s infinite;
  min-height: 280px;
}

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

/* Staggered animation for grid */
.disciplines-grid--staggered .discipline-card {
  animation-fill-mode: both;
}

.disciplines-grid--staggered .discipline-card--visible {
  animation: cardFadeIn 0.4s ease-out;
}

@keyframes cardFadeIn {
  from {
    opacity: 0;
    transform: translateY(15px) scale(0.98);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

/* Performance optimization: Disable animations on low-end devices */
@media (prefers-reduced-motion: reduce) {
  .discipline-card,
  .discipline-card--loading,
  .discipline-card--visible,
  .discipline-card--lazy {
    animation: none !important;
    transition: none !important;
  }
  
  .disciplines-grid--staggered .discipline-card {
    animation: none !important;
  }
}

/* Estados especiais dos cards */
.discipline-card[data-status="ativo"] .discipline-icon {
  box-shadow: 0 0 0 2px rgba(var(--color-success-rgb), 0.3);
}

.discipline-card[data-status="em-desenvolvimento"] .discipline-icon {
  box-shadow: 0 0 0 2px rgba(var(--color-warning-rgb), 0.3);
}

.discipline-card[data-status="indisponível"] .discipline-icon {
  box-shadow: 0 0 0 2px rgba(var(--color-error-rgb), 0.3);
}

/* Efeitos de hover específicos por status */
.discipline-card[data-status="ativo"]:hover {
  border-color: var(--color-success);
}

.discipline-card[data-status="em-desenvolvimento"]:hover {
  border-color: var(--color-warning);
}

.discipline-card[data-status="indisponível"]:hover {
  border-color: var(--color-error);
}

/* Melhorias de acessibilidade */
.discipline-card:focus-within {
  box-shadow: var(--shadow-lg);
  border-color: var(--color-primary);
}

/* Estados de Loading e Empty */
.loading-state,
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-32);
  text-align: center;
  min-height: 300px;
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-card-border);
  margin: var(--space-16) 0;
  transition: all var(--duration-normal) var(--ease-standard);
}

.loading-state {
  background: linear-gradient(135deg, var(--color-surface) 0%, var(--color-bg-1) 100%);
  animation: loadingPulse 2s ease-in-out infinite;
}

@keyframes loadingPulse {
  0%, 100% { 
    opacity: 1; 
    transform: scale(1);
  }
  50% { 
    opacity: 0.95; 
    transform: scale(1.01);
  }
}

.loading-spinner {
  width: 48px;
  height: 48px;
  border: 4px solid var(--color-secondary);
  border-top: 4px solid var(--color-primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin-bottom: var(--space-20);
  position: relative;
}

.loading-spinner::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 20px;
  height: 20px;
  background: var(--color-primary);
  border-radius: 50%;
  transform: translate(-50%, -50%);
  opacity: 0.3;
  animation: innerSpin 2s linear infinite reverse;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

@keyframes innerSpin {
  0% { transform: translate(-50%, -50%) rotate(0deg) scale(1); }
  50% { transform: translate(-50%, -50%) rotate(180deg) scale(0.8); }
  100% { transform: translate(-50%, -50%) rotate(360deg) scale(1); }
}

.loading-state p {
  color: var(--color-text-secondary);
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-medium);
  margin: 0;
  animation: loadingText 1.5s ease-in-out infinite;
}

@keyframes loadingText {
  0%, 100% { opacity: 0.7; }
  50% { opacity: 1; }
}

.empty-state {
  background: linear-gradient(135deg, var(--color-surface) 0%, var(--color-bg-2) 100%);
}

.empty-icon {
  font-size: 64px;
  margin-bottom: var(--space-20);
  opacity: 0.6;
  animation: emptyIconFloat 3s ease-in-out infinite;
}

@keyframes emptyIconFloat {
  0%, 100% { transform: translateY(0px); }
  50% { transform: translateY(-8px); }
}

.empty-state h3 {
  color: var(--color-text);
  margin-bottom: var(--space-12);
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-semibold);
}

.empty-state p {
  color: var(--color-text-secondary);
  margin: 0 0 var(--space-20) 0;
  font-size: var(--font-size-base);
  max-width: 400px;
  line-height: var(--line-height-normal);
}

.empty-state-actions {
  display: flex;
  gap: var(--space-12);
  flex-wrap: wrap;
  justify-content: center;
}

.empty-state-btn {
  padding: var(--space-8) var(--space-16);
  background: var(--color-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-base);
  color: var(--color-text-secondary);
  text-decoration: none;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  transition: all var(--duration-fast) var(--ease-standard);
  cursor: pointer;
}

.empty-state-btn:hover {
  background: var(--color-secondary-hover);
  color: var(--color-text);
  border-color: var(--color-primary);
  transform: translateY(-1px);
}

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

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

/* Performance optimizations for states */
.loading-state,
.empty-state {
  contain: layout style;
  will-change: opacity, transform;
}

/* Hidden state optimization */
.hidden {
  display: none !important;
  visibility: hidden;
  opacity: 0;
  pointer-events: none;
}

/* Modal */
.modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-16);
  /* Performance optimizations */
  contain: layout style;
  will-change: opacity;
}

.modal-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  transition: opacity var(--duration-normal) var(--ease-standard);
  cursor: pointer;
}

.modal-content {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-card-border);
  box-shadow: var(--shadow-xl);
  max-width: 700px;
  width: 100%;
  max-height: 90vh;
  overflow: hidden;
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  /* Performance optimizations */
  contain: layout style paint;
  will-change: transform, opacity;
  cursor: default;
}

@keyframes modalSlideIn {
  from {
    opacity: 0;
    transform: scale(0.95) translateY(-20px);
  }
  to {
    opacity: 1;
    transform: scale(1) translateY(0);
  }
}

.modal-header {
  padding: var(--space-24);
  border-bottom: 1px solid var(--color-card-border-inner);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-shrink: 0;
  background: var(--color-bg-1);
}

.modal-header h3 {
  color: var(--color-text);
  margin: 0;
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-semibold);
  line-height: var(--line-height-tight);
}

.modal-close-btn {
  background: none;
  border: none;
  font-size: var(--font-size-xl);
  color: var(--color-text-secondary);
  cursor: pointer;
  padding: var(--space-8);
  border-radius: var(--radius-base);
  transition: all var(--duration-fast) var(--ease-standard);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
}

.modal-close-btn:hover {
  background: var(--color-secondary);
  color: var(--color-text);
  transform: scale(1.1);
}

.modal-close-btn:focus-visible {
  outline: var(--focus-outline);
  outline-offset: 2px;
}

.modal-body {
  padding: var(--space-24);
  overflow-y: auto;
  flex: 1;
  /* Custom scrollbar */
  scrollbar-width: thin;
  scrollbar-color: var(--color-primary) var(--color-secondary);
}

.modal-body::-webkit-scrollbar {
  width: 8px;
}

.modal-body::-webkit-scrollbar-track {
  background: var(--color-secondary);
  border-radius: var(--radius-base);
}

.modal-body::-webkit-scrollbar-thumb {
  background: var(--color-primary);
  border-radius: var(--radius-base);
}

.modal-body::-webkit-scrollbar-thumb:hover {
  background: var(--color-primary-hover);
}

.modal-footer {
  padding: var(--space-24);
  border-top: 1px solid var(--color-card-border-inner);
  display: flex;
  gap: var(--space-12);
  justify-content: flex-end;
  flex-shrink: 0;
  background: var(--color-bg-1);
}

/* Conteúdo do Modal */
.modal-discipline-info {
  margin-bottom: var(--space-24);
}

.modal-discipline-header {
  display: flex;
  align-items: flex-start;
  gap: var(--space-20);
  margin-bottom: var(--space-20);
  padding: var(--space-20);
  background: var(--color-bg-1);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-card-border-inner);
}

.modal-discipline-icon {
  font-size: var(--font-size-4xl);
  width: 70px;
  height: 70px;
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  border: 2px solid rgba(255, 255, 255, 0.2);
  position: relative;
  overflow: hidden;
}

.modal-discipline-icon::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: inherit;
  opacity: 0.8;
  z-index: -1;
}

.modal-discipline-details {
  flex: 1;
  min-width: 0;
}

.modal-discipline-details h4 {
  color: var(--color-text);
  margin: 0 0 var(--space-12) 0;
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-tight);
}

.modal-discipline-meta {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-8);
  margin-bottom: var(--space-16);
}

.modal-discipline-meta p {
  display: flex;
  align-items: center;
  gap: var(--space-8);
  margin: 0;
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}

.modal-discipline-meta .meta-label {
  font-weight: var(--font-weight-medium);
  color: var(--color-text);
}

.modal-discipline-meta .meta-value {
  font-weight: var(--font-weight-semibold);
  color: var(--color-primary);
}

.modal-status {
  display: flex;
  gap: var(--space-8);
  flex-wrap: wrap;
  align-items: center;
}

.modal-sections {
  display: flex;
  flex-direction: column;
  gap: var(--space-24);
}

.modal-section {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-card-border-inner);
  overflow: hidden;
}

.modal-section--highlight {
  border-color: var(--color-success);
  background: rgba(var(--color-success-rgb), 0.02);
}

.modal-section--warning {
  border-color: var(--color-warning);
  background: rgba(var(--color-warning-rgb), 0.02);
}

.modal-section--error {
  border-color: var(--color-error);
  background: rgba(var(--color-error-rgb), 0.02);
}

.modal-section-title {
  color: var(--color-primary);
  margin: 0;
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  padding: var(--space-16) var(--space-20);
  background: var(--color-bg-1);
  border-bottom: 1px solid var(--color-card-border-inner);
  display: flex;
  align-items: center;
  gap: var(--space-8);
}

.modal-section--highlight .modal-section-title {
  color: var(--color-success);
  background: rgba(var(--color-success-rgb), 0.05);
}

.modal-section--warning .modal-section-title {
  color: var(--color-warning);
  background: rgba(var(--color-warning-rgb), 0.05);
}

.modal-section--error .modal-section-title {
  color: var(--color-error);
  background: rgba(var(--color-error-rgb), 0.05);
}

.modal-section-content {
  padding: var(--space-20);
}

.modal-section-content p {
  color: var(--color-text);
  margin: 0 0 var(--space-12) 0;
  line-height: var(--line-height-normal);
}

.modal-section-content p:last-child {
  margin-bottom: 0;
}

.ementa-text {
  font-size: var(--font-size-base);
  line-height: var(--line-height-relaxed);
  text-align: justify;
}

.objectives-list,
.prerequisites-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-12);
}

.objectives-list li,
.prerequisites-list li {
  display: flex;
  align-items: flex-start;
  gap: var(--space-12);
  padding: var(--space-12);
  background: var(--color-bg-1);
  border-radius: var(--radius-base);
  border: 1px solid var(--color-card-border-inner);
  transition: all var(--duration-fast) var(--ease-standard);
}

.objectives-list li:hover,
.prerequisites-list li:hover {
  background: var(--color-bg-2);
  border-color: var(--color-primary);
  transform: translateX(4px);
}

.objective-bullet,
.prerequisite-bullet {
  flex-shrink: 0;
  font-size: var(--font-size-sm);
  color: var(--color-success);
  font-weight: var(--font-weight-bold);
}

.prerequisite-bullet {
  color: var(--color-primary);
}

.objective-text,
.prerequisite-text {
  color: var(--color-text);
  font-size: var(--font-size-sm);
  line-height: var(--line-height-normal);
}

.professor-info {
  display: flex;
  flex-direction: column;
  gap: var(--space-12);
}

.professor-detail {
  display: flex;
  align-items: center;
  gap: var(--space-12);
  padding: var(--space-12);
  background: var(--color-bg-1);
  border-radius: var(--radius-base);
  border: 1px solid var(--color-card-border-inner);
}

.professor-label {
  font-weight: var(--font-weight-semibold);
  color: var(--color-text);
  min-width: 100px;
  font-size: var(--font-size-sm);
}

.professor-value {
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
}

.professor-email {
  color: var(--color-primary);
  text-decoration: none;
  font-size: var(--font-size-sm);
  transition: color var(--duration-fast) var(--ease-standard);
}

.professor-email:hover {
  color: var(--color-primary-hover);
  text-decoration: underline;
}

.professor-email:focus-visible {
  outline: var(--focus-outline);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

.access-info,
.development-info,
.unavailable-info {
  font-size: var(--font-size-base);
  line-height: var(--line-height-normal);
  margin-bottom: var(--space-16);
}

.access-features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: var(--space-12);
}

.feature-item {
  display: flex;
  align-items: center;
  gap: var(--space-8);
  padding: var(--space-8) var(--space-12);
  background: var(--color-bg-2);
  border-radius: var(--radius-base);
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}

.feature-icon {
  font-size: var(--font-size-base);
}

/* Responsividade do Modal */
@media (max-width: 768px) {
  .modal {
    padding: var(--space-8);
    align-items: flex-start;
    padding-top: var(--space-20);
  }

  .modal-content {
    max-width: 100%;
    max-height: 95vh;
  }

  .modal-header,
  .modal-body,
  .modal-footer {
    padding: var(--space-16);
  }

  .modal-header h3 {
    font-size: var(--font-size-lg);
  }

  .modal-discipline-header {
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: var(--space-16);
  }

  .modal-discipline-icon {
    width: 60px;
    height: 60px;
    font-size: var(--font-size-3xl);
  }

  .modal-discipline-details h4 {
    font-size: var(--font-size-xl);
  }

  .modal-discipline-meta {
    grid-template-columns: 1fr;
  }

  .modal-footer {
    flex-direction: column-reverse;
  }

  .modal-footer .btn {
    width: 100%;
  }

  .access-features {
    grid-template-columns: 1fr;
  }

  .professor-detail {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-4);
  }

  .professor-label {
    min-width: auto;
    font-weight: var(--font-weight-bold);
  }
}

@media (max-width: 480px) {
  .modal {
    padding: var(--space-4);
    padding-top: var(--space-12);
  }

  .modal-header,
  .modal-body,
  .modal-footer {
    padding: var(--space-12);
  }

  .modal-discipline-icon {
    width: 50px;
    height: 50px;
    font-size: var(--font-size-2xl);
  }

  .modal-section-title {
    font-size: var(--font-size-base);
    padding: var(--space-12) var(--space-16);
  }

  .modal-section-content {
    padding: var(--space-16);
  }
}

/* Animações aprimoradas */
.modal.hidden {
  opacity: 0;
  pointer-events: none;
}

.modal:not(.hidden) .modal-overlay {
  animation: modalOverlayFadeIn var(--duration-normal) var(--ease-standard);
}

.modal:not(.hidden) .modal-content {
  animation: modalSlideIn var(--duration-normal) var(--ease-standard);
}

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

/* Acessibilidade aprimorada */
.modal[aria-hidden="true"] {
  display: none;
}

.modal:focus {
  outline: none;
}

/* Suporte para modo escuro */
@media (prefers-color-scheme: dark) {
  .modal-overlay {
    background: rgba(0, 0, 0, 0.8);
  }
}

/* Suporte para movimento reduzido */
@media (prefers-reduced-motion: reduce) {
  .modal-content,
  .modal-overlay {
    animation: none !important;
    transition: none !important;
  }

  .objectives-list li:hover,
  .prerequisites-list li:hover {
    transform: none !important;
  }

  .modal-close-btn:hover {
    transform: none !important;
  }
}

/* Sistema de Notificações */
#notification-container {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 1100;
  max-width: 400px;
}

.notification {
  margin-bottom: var(--space-10);
  padding: var(--space-12) var(--space-16);
  border-radius: var(--radius-base);
  box-shadow: var(--shadow-md);
  cursor: pointer;
  animation: slideInRight 0.3s ease-out;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

@keyframes slideInRight {
  from {
    transform: translateX(100%);
    opacity: 0;
  }
  to {
    transform: translateX(0);
    opacity: 1;
  }
}

@keyframes slideOutRight {
  from {
    transform: translateX(0);
    opacity: 1;
  }
  to {
    transform: translateX(100%);
    opacity: 0;
  }
}

.notification-close {
  margin-left: var(--space-12);
  opacity: 0.7;
  font-size: var(--font-size-sm);
}

/* Footer */
.footer {
  background: var(--color-surface);
  border-top: 1px solid var(--color-card-border);
  padding: var(--space-32) 0 var(--space-16);
  margin-top: var(--space-32);
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--space-24);
  margin-bottom: var(--space-24);
}

.footer-section h4 {
  color: var(--color-primary);
  margin-bottom: var(--space-12);
}

.footer-section p,
.footer-section a {
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
  margin-bottom: var(--space-6);
  display: block;
}

.footer-section a:hover {
  color: var(--color-primary);
}

.footer-bottom {
  text-align: center;
  padding-top: var(--space-16);
  border-top: 1px solid var(--color-card-border-inner);
}

.footer-bottom p {
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
  margin: 0;
}

/* Grid Performance Optimizations */
.disciplines-grid-section {
  /* Enable hardware acceleration */
  transform: translateZ(0);
  backface-visibility: hidden;
  perspective: 1000px;
}

/* Virtual scrolling support for large datasets */
.disciplines-grid--virtual {
  height: 600px;
  overflow-y: auto;
  scroll-behavior: smooth;
  /* Optimize scrolling performance */
  contain: strict;
  overscroll-behavior: contain;
}

.disciplines-grid--virtual .discipline-card {
  /* Optimize for scrolling performance */
  transform: translate3d(0, 0, 0);
  will-change: transform;
  contain: layout style paint;
}

/* Masonry-style layout for varied content heights */
.disciplines-grid--masonry {
  display: grid;
  grid-template-rows: masonry;
  align-items: start;
}

/* Staggered animation support */
.disciplines-grid--staggered .discipline-card {
  opacity: 0;
  transform: translateY(20px);
  animation: cardStaggerIn 0.6s ease-out forwards;
}

@keyframes cardStaggerIn {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Intersection Observer optimization classes */
.discipline-card--loading {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity var(--duration-normal) var(--ease-standard),
              transform var(--duration-normal) var(--ease-standard);
}

.discipline-card--visible {
  opacity: 1;
  transform: translateY(0);
}

/* Grid layout optimizations for different screen densities */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
  .disciplines-grid {
    /* Optimize for high-DPI displays */
    image-rendering: -webkit-optimize-contrast;
    image-rendering: crisp-edges;
  }
}

/* Reduced motion preferences */
@media (prefers-reduced-motion: reduce) {
  .discipline-card,
  .loading-spinner,
  .empty-icon,
  .discipline-card--loading {
    animation: none !important;
    transition: none !important;
  }
  
  .discipline-card:hover {
    transform: none !important;
  }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
  .disciplines-grid {
    gap: var(--space-32);
  }
  
  .discipline-card {
    border-width: 2px;
    border-color: var(--color-text);
  }
  
  .loading-state,
  .empty-state {
    border-width: 2px;
    border-color: var(--color-text);
  }
}

/* Grid container optimizations */
.disciplines-grid-container {
  /* Enable GPU acceleration for smooth scrolling */
  transform: translate3d(0, 0, 0);
  -webkit-overflow-scrolling: touch;
}

/* Enhanced loading states */
.loading-progress {
  margin-top: var(--space-16);
  display: flex;
  justify-content: center;
}

.loading-dots {
  display: flex;
  gap: var(--space-8);
}

.loading-dots span {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-primary);
  animation: loadingDots 1.4s ease-in-out infinite both;
}

.loading-dots span:nth-child(1) { animation-delay: -0.32s; }
.loading-dots span:nth-child(2) { animation-delay: -0.16s; }
.loading-dots span:nth-child(3) { animation-delay: 0s; }

@keyframes loadingDots {
  0%, 80%, 100% {
    transform: scale(0.8);
    opacity: 0.5;
  }
  40% {
    transform: scale(1.2);
    opacity: 1;
  }
}

/* Skeleton loading placeholders */
.discipline-card--placeholder {
  background: var(--color-surface);
  border: 1px solid var(--color-card-border);
  border-radius: var(--radius-lg);
  padding: var(--space-20);
  min-height: 280px;
  animation: skeletonPulse 1.5s ease-in-out infinite;
  pointer-events: none;
}

@keyframes skeletonPulse {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.7;
  }
}

.skeleton {
  background: linear-gradient(90deg, 
    var(--color-secondary) 25%, 
    var(--color-secondary-hover) 50%, 
    var(--color-secondary) 75%);
  background-size: 200% 100%;
  animation: shimmerLoading 1.5s infinite;
  border-radius: var(--radius-sm);
}

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

.skeleton--icon {
  width: 50px;
  height: 50px;
  border-radius: var(--radius-base);
  flex-shrink: 0;
}

.skeleton--title {
  height: 24px;
  width: 80%;
  margin-bottom: var(--space-8);
}

.skeleton--subtitle {
  height: 16px;
  width: 60%;
}

.skeleton--meta {
  height: 20px;
  width: 60px;
  border-radius: var(--radius-sm);
}

.skeleton--status {
  height: 24px;
  width: 80px;
  border-radius: var(--radius-sm);
}

.skeleton--button {
  height: 36px;
  flex: 1;
  border-radius: var(--radius-base);
}

/* Load more button styling */
.load-more-container {
  grid-column: 1 / -1;
  display: flex;
  justify-content: center;
  padding: var(--space-24);
}

.load-more-btn {
  padding: var(--space-12) var(--space-24);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-semibold);
  transition: all var(--duration-normal) var(--ease-standard);
  position: relative;
  overflow: hidden;
}

.load-more-btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
  transition: left var(--duration-slow) var(--ease-standard);
}

.load-more-btn:hover::before {
  left: 100%;
}

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

/* Performance optimizations for large grids */
.disciplines-grid--optimized {
  contain: layout style paint;
  will-change: contents;
}

.disciplines-grid--optimized .discipline-card {
  contain: layout style paint;
  will-change: transform;
}

/* Lazy loading intersection observer classes */
.discipline-card--lazy {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity var(--duration-normal) var(--ease-standard),
              transform var(--duration-normal) var(--ease-standard);
}

.discipline-card--lazy.discipline-card--visible {
  opacity: 1;
  transform: translateY(0);
}

/* Responsividade */
@media (max-width: 768px) {
  .header {
    padding: var(--space-16) 0;
  }
  
  .header-content {
    flex-direction: column;
    gap: var(--space-16);
    text-align: center;
    margin-bottom: var(--space-12);
  }
  
  .logo-section {
    flex-direction: column;
    gap: var(--space-12);
  }
  
  .school-logos {
    justify-content: center;
  }
  
  .school-logo,
  .course-logo {
    height: 50px;
  }
  
  .logo-text h1 {
    font-size: var(--font-size-xl);
  }
  
  .header-info {
    flex-direction: column;
    gap: var(--space-16);
  }
  
  .nav-links {
    flex-wrap: wrap;
    gap: var(--space-12);
  }
  
  .nav-link {
    flex-direction: column;
    gap: var(--space-4);
    padding: var(--space-12);
    min-width: 80px;
  }
  
  .nav-text {
    font-size: var(--font-size-xs);
  }
  
  .filters {
    flex-direction: column;
  }
  
  .filters select {
    min-width: auto;
  }
  
  .disciplines-grid {
    grid-template-columns: 1fr;
    gap: var(--space-16);
  }
  
  .disciplines-grid-section {
    min-height: 300px;
  }
  
  .discipline-meta {
    flex-direction: column;
    gap: var(--space-6);
  }
  
  .modal-content {
    margin: var(--space-16);
    max-height: 90vh;
  }
  
  .modal-footer {
    flex-direction: column;
  }
  
  .footer-content {
    grid-template-columns: 1fr;
    text-align: center;
  }
}

@media (max-width: 480px) {
  .header {
    padding: var(--space-12) 0;
  }
  
  .school-logos {
    gap: var(--space-8);
  }
  
  .school-logo,
  .course-logo {
    height: 40px;
  }
  
  .logo-text h1 {
    font-size: var(--font-size-lg);
  }
  
  .school-name {
    font-size: var(--font-size-sm);
  }
  
  .school-subtitle {
    font-size: var(--font-size-xs);
  }
  
  .contact-icon,
  .info-icon {
    width: 35px;
    height: 35px;
    font-size: var(--font-size-lg);
  }
  
  .contact-label,
  .info-label {
    font-size: var(--font-size-xs);
  }
  
  .contact-value,
  .info-value {
    font-size: var(--font-size-xs);
  }
  
  .nav-links {
    gap: var(--space-8);
  }
  
  .nav-link {
    padding: var(--space-8);
    min-width: 70px;
  }
  
  .nav-icon {
    font-size: var(--font-size-base);
  }
  
  .nav-text {
    font-size: 10px;
  }
  
  .main-content {
    padding: var(--space-16) 0;
  }
  
  .search-filter-section {
    padding: var(--space-16);
  }
  
  .discipline-card {
    padding: var(--space-16);
  }
  
  .discipline-header {
    flex-direction: column;
    text-align: center;
  }
  
  .discipline-actions {
    flex-direction: column;
  }
}
/* 
Sistema de Redirecionamento - Estilos */

/* Fallback de redirecionamento quando popup é bloqueado */
.redirection-fallback {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  z-index: 1100;
  background: var(--color-surface);
  border: 2px solid var(--color-primary);
  border-radius: var(--radius-lg);
  padding: var(--space-24);
  box-shadow: var(--shadow-xl);
  max-width: 400px;
  width: 90%;
  animation: fallbackSlideIn 0.3s ease-out;
}

@keyframes fallbackSlideIn {
  from {
    opacity: 0;
    transform: translate(-50%, -50%) scale(0.9);
  }
  to {
    opacity: 1;
    transform: translate(-50%, -50%) scale(1);
  }
}

.fallback-content {
  text-align: center;
}

.fallback-content p {
  color: var(--color-text);
  margin-bottom: var(--space-16);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
}

.fallback-content .btn {
  margin: var(--space-8);
}

.fallback-content .btn--primary {
  background: var(--color-success);
  border-color: var(--color-success);
  color: var(--color-btn-primary-text);
  font-weight: var(--font-weight-semibold);
  padding: var(--space-12) var(--space-20);
  font-size: var(--font-size-base);
}

.fallback-content .btn--primary:hover {
  background: var(--color-success-hover);
  border-color: var(--color-success-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

/* Sistema de Notificações Aprimorado */
.notification {
  position: relative;
  padding: var(--space-12) var(--space-16);
  border-radius: var(--radius-base);
  margin-bottom: var(--space-8);
  display: flex;
  align-items: flex-start;
  gap: var(--space-12);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  animation: slideInRight 0.3s ease-out;
  border-left: 4px solid transparent;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  box-shadow: var(--shadow-lg);
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease-standard);
  min-height: 48px;
}

.notification:hover {
  transform: translateX(-4px);
  box-shadow: var(--shadow-xl);
}

@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(100%);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes slideOutRight {
  from {
    opacity: 1;
    transform: translateX(0);
  }
  to {
    opacity: 0;
    transform: translateX(100%);
  }
}

/* Tipos de notificação */
.notification.status--success {
  background: rgba(var(--color-success-rgb), 0.12);
  border-left-color: var(--color-success);
  color: var(--color-success);
  border: 1px solid rgba(var(--color-success-rgb), 0.2);
}

.notification.status--warning {
  background: rgba(var(--color-warning-rgb), 0.12);
  border-left-color: var(--color-warning);
  color: var(--color-warning);
  border: 1px solid rgba(var(--color-warning-rgb), 0.2);
}

.notification.status--error {
  background: rgba(var(--color-error-rgb), 0.12);
  border-left-color: var(--color-error);
  color: var(--color-error);
  border: 1px solid rgba(var(--color-error-rgb), 0.2);
}

.notification.status--info {
  background: rgba(var(--color-primary-rgb), 0.12);
  border-left-color: var(--color-primary);
  color: var(--color-primary);
  border: 1px solid rgba(var(--color-primary-rgb), 0.2);
}

.notification.status--filter {
  background: rgba(var(--color-teal-500-rgb), 0.12);
  border-left-color: var(--color-teal-500);
  color: var(--color-teal-500);
  border: 1px solid rgba(var(--color-teal-500-rgb), 0.2);
}

.notification.status--access {
  background: rgba(var(--color-success-rgb), 0.15);
  border-left-color: var(--color-success);
  color: var(--color-success);
  border: 1px solid rgba(var(--color-success-rgb), 0.3);
  animation: slideInRight 0.3s ease-out, successPulse 0.6s ease-out 0.3s;
}

.notification.status--loading {
  background: rgba(var(--color-slate-500-rgb), 0.12);
  border-left-color: var(--color-slate-500);
  color: var(--color-slate-500);
  border: 1px solid rgba(var(--color-slate-500-rgb), 0.2);
}

/* Animação especial para notificações de sucesso */
@keyframes successPulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.02); }
}

/* Componentes da notificação */
.notification-content {
  display: flex;
  align-items: center;
  gap: var(--space-8);
  flex: 1;
  min-width: 0;
}

.notification-icon {
  font-size: var(--font-size-lg);
  flex-shrink: 0;
  line-height: 1;
}

.notification-message {
  flex: 1;
  line-height: var(--line-height-normal);
  word-wrap: break-word;
}

.notification-actions {
  display: flex;
  gap: var(--space-6);
  margin-left: var(--space-8);
  flex-shrink: 0;
}

.notification-action-btn {
  background: rgba(255, 255, 255, 0.15);
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: inherit;
  padding: var(--space-4) var(--space-8);
  border-radius: var(--radius-sm);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease-standard);
  white-space: nowrap;
}

.notification-action-btn:hover {
  background: rgba(255, 255, 255, 0.25);
  border-color: rgba(255, 255, 255, 0.4);
  transform: translateY(-1px);
}

.notification-close {
  cursor: pointer;
  padding: var(--space-4);
  border-radius: var(--radius-sm);
  transition: all var(--duration-fast) var(--ease-standard);
  opacity: 0.7;
  font-size: var(--font-size-lg);
  line-height: 1;
  flex-shrink: 0;
  background: none;
  border: none;
  color: inherit;
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.notification-close:hover {
  opacity: 1;
  background: rgba(255, 255, 255, 0.15);
  transform: scale(1.1);
}

.notification-close:focus-visible {
  outline: 2px solid rgba(255, 255, 255, 0.5);
  outline-offset: 2px;
}

/* Container de notificações */
#notification-container {
  position: fixed;
  top: var(--space-20);
  right: var(--space-20);
  z-index: 1200;
  max-width: 400px;
  width: 100%;
  pointer-events: none;
}

#notification-container .notification {
  pointer-events: all;
  margin-bottom: var(--space-8);
  box-shadow: var(--shadow-lg);
}

/* Screen reader announcer para notificações */
#notification-announcer {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Indicadores de validação de URL */
.url-validation-indicator {
  display: inline-flex;
  align-items: center;
  gap: var(--space-4);
  font-size: var(--font-size-xs);
  padding: var(--space-2) var(--space-6);
  border-radius: var(--radius-sm);
  font-weight: var(--font-weight-medium);
}

.url-validation-indicator--valid {
  background: rgba(var(--color-success-rgb), 0.1);
  color: var(--color-success);
}

.url-validation-indicator--invalid {
  background: rgba(var(--color-error-rgb), 0.1);
  color: var(--color-error);
}

.url-validation-indicator--checking {
  background: rgba(var(--color-warning-rgb), 0.1);
  color: var(--color-warning);
  animation: pulse 1.5s ease-in-out infinite;
}

/* Botão de carregamento mais disciplinas */
.load-more-container {
  grid-column: 1 / -1;
  display: flex;
  justify-content: center;
  padding: var(--space-24);
  margin-top: var(--space-16);
}

.load-more-btn {
  padding: var(--space-12) var(--space-24);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-semibold);
  border-radius: var(--radius-lg);
  transition: all var(--duration-normal) var(--ease-standard);
  position: relative;
  overflow: hidden;
}

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

.load-more-btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

/* Animações de carregamento para cards */
.discipline-card--loading {
  opacity: 0;
  transform: translateY(20px);
  animation: cardLoadIn 0.5s ease-out forwards;
}

.discipline-card--visible {
  opacity: 1;
  transform: translateY(0);
}

.discipline-card--lazy {
  opacity: 0.3;
  transform: translateY(10px);
  transition: all var(--duration-normal) var(--ease-standard);
}

@keyframes cardLoadIn {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Skeleton loading para melhor perceived performance */
.discipline-card--placeholder {
  background: var(--color-surface);
  border: 1px solid var(--color-card-border);
  border-radius: var(--radius-lg);
  padding: var(--space-20);
  animation: skeletonPulse 1.5s ease-in-out infinite;
  pointer-events: none;
}

@keyframes skeletonPulse {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.7;
  }
}

.skeleton {
  background: linear-gradient(90deg, var(--color-secondary) 25%, var(--color-secondary-hover) 50%, var(--color-secondary) 75%);
  background-size: 200% 100%;
  animation: skeletonShimmer 1.5s infinite;
  border-radius: var(--radius-sm);
}

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

.skeleton--icon {
  width: 50px;
  height: 50px;
  border-radius: var(--radius-base);
}

.skeleton--title {
  height: 20px;
  width: 80%;
  margin-bottom: var(--space-4);
}

.skeleton--subtitle {
  height: 14px;
  width: 60%;
}

.skeleton--meta {
  height: 12px;
  width: 40%;
  margin-bottom: var(--space-4);
}

.skeleton--status {
  height: 24px;
  width: 60px;
  border-radius: var(--radius-base);
}

.skeleton--button {
  height: 32px;
  width: 100%;
  border-radius: var(--radius-base);
  margin-bottom: var(--space-4);
}

/* Melhorias de performance para scrolling virtual */
.disciplines-grid--virtual {
  contain: layout style paint;
  will-change: contents;
}

.disciplines-grid-section--virtual {
  overflow-y: auto;
  max-height: 80vh;
  scrollbar-width: thin;
  scrollbar-color: var(--color-primary) var(--color-secondary);
}

.disciplines-grid-section--virtual::-webkit-scrollbar {
  width: 8px;
}

.disciplines-grid-section--virtual::-webkit-scrollbar-track {
  background: var(--color-secondary);
  border-radius: var(--radius-base);
}

.disciplines-grid-section--virtual::-webkit-scrollbar-thumb {
  background: var(--color-primary);
  border-radius: var(--radius-base);
}

.disciplines-grid-section--virtual::-webkit-scrollbar-thumb:hover {
  background: var(--color-primary-hover);
}

/* Animações staggered para entrada de cards */
.disciplines-grid--staggered .discipline-card {
  animation-delay: calc(var(--stagger-delay, 0) * 50ms);
}

/* Estados de hover aprimorados para diferentes status */
.discipline-card[data-status="ativo"] .access-btn {
  background: rgba(var(--color-success-rgb), 0.1);
  border-color: var(--color-success);
  color: var(--color-success);
}

.discipline-card[data-status="ativo"] .access-btn:hover {
  background: var(--color-success);
  color: var(--color-btn-primary-text);
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}

.discipline-card[data-status="em-desenvolvimento"] .access-btn {
  background: rgba(var(--color-warning-rgb), 0.1);
  border-color: var(--color-warning);
  color: var(--color-warning);
}

.discipline-card[data-status="indisponível"] .access-btn {
  background: rgba(var(--color-error-rgb), 0.1);
  border-color: var(--color-error);
  color: var(--color-error);
}

/* Responsividade para notificações */
@media (max-width: 768px) {
  #notification-container {
    top: var(--space-12);
    right: var(--space-12);
    left: var(--space-12);
    max-width: none;
  }

  .redirection-fallback {
    width: 95%;
    padding: var(--space-16);
  }

  .fallback-content .btn {
    width: 100%;
    margin: var(--space-4) 0;
  }
}

/* Melhorias de acessibilidade para o sistema de redirecionamento */
@media (prefers-reduced-motion: reduce) {
  .notification,
  .redirection-fallback,
  .discipline-card--loading,
  .skeleton {
    animation: none;
  }

  .discipline-card:hover {
    transform: none;
  }

  .load-more-btn:hover {
    transform: none;
  }
}

/* Focus indicators aprimorados */
.discipline-card:focus-visible {
  outline: 3px solid var(--color-primary);
  outline-offset: 2px;
  border-radius: var(--radius-lg);
}

.load-more-btn:focus-visible {
  outline: 3px solid var(--color-primary);
  outline-offset: 2px;
}

/* Estados de loading específicos para validação de URL */
.discipline-card--validating .access-btn {
  position: relative;
  overflow: hidden;
}

.discipline-card--validating .access-btn::after {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  animation: validateSweep 1.5s infinite;
}

@keyframes validateSweep {
  0% {
    left: -100%;
  }
  100% {
    left: 100%;
  }
}

/* Indicadores visuais para diferentes tipos de redirecionamento */
.discipline-card[data-redirect-type="external"]::before {
  content: '🔗';
  position: absolute;
  top: var(--space-8);
  left: var(--space-8);
  font-size: var(--font-size-sm);
  opacity: 0.6;
  z-index: 1;
}

.discipline-card[data-redirect-type="internal"]::before {
  content: '🏠';
  position: absolute;
  top: var(--space-8);
  left: var(--space-8);
  font-size: var(--font-size-sm);
  opacity: 0.6;
  z-index: 1;
}

/* Animação de progresso para loading dots */
.loading-dots {
  display: flex;
  gap: var(--space-4);
  justify-content: center;
  margin-top: var(--space-12);
}

.loading-dots span {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-primary);
  animation: loadingDot 1.4s ease-in-out infinite both;
}

.loading-dots span:nth-child(1) { animation-delay: -0.32s; }
.loading-dots span:nth-child(2) { animation-delay: -0.16s; }
.loading-dots span:nth-child(3) { animation-delay: 0s; }

@keyframes loadingDot {
  0%, 80%, 100% {
    transform: scale(0.8);
    opacity: 0.5;
  }
  40% {
    transform: scale(1);
    opacity: 1;
  }
}

/* Otimizações de performance para dispositivos móveis */
@media (max-width: 768px) {
  .discipline-card {
    will-change: auto;
    transform: none;
  }

  .discipline-card:hover {
    transform: none;
    box-shadow: var(--shadow-sm);
  }

  .disciplines-grid {
    contain: layout;
  }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
  .notification {
    border: 2px solid currentColor;
  }

  .redirection-fallback {
    border: 3px solid var(--color-primary);
  }

  .skeleton {
    background: var(--color-border);
  }
}/*
 Virtual Scrolling and Load More Optimizations */
.disciplines-grid--virtual {
  /* Optimize for frequent content changes */
  contain: strict;
  will-change: contents, scroll-position;
}

.load-more-container {
  grid-column: 1 / -1;
  display: flex;
  justify-content: center;
  align-items: center;
  padding: var(--space-32) var(--space-16);
  margin-top: var(--space-16);
}

.load-more-btn {
  position: relative;
  overflow: hidden;
  transition: all 0.3s ease;
  min-width: 200px;
  padding: var(--space-12) var(--space-24);
}

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

.load-more-btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

.load-more-btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
  transition: left 0.5s;
}

.load-more-btn:hover::before {
  left: 100%;
}

/* Skeleton loading for better perceived performance */
.discipline-card--skeleton {
  background: var(--color-surface);
  border: 1px solid var(--color-card-border);
  border-radius: var(--radius-lg);
  padding: var(--space-20);
  min-height: 280px;
  position: relative;
  overflow: hidden;
}

.discipline-card--skeleton::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(90deg, 
    transparent 25%, 
    rgba(var(--color-primary-rgb), 0.1) 50%, 
    transparent 75%);
  background-size: 200% 100%;
  animation: skeletonShimmer 1.5s infinite;
}

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

.skeleton-header {
  display: flex;
  gap: var(--space-12);
  margin-bottom: var(--space-16);
}

.skeleton-icon {
  width: 50px;
  height: 50px;
  background: var(--color-secondary);
  border-radius: var(--radius-base);
}

.skeleton-text {
  flex: 1;
}

.skeleton-line {
  height: 16px;
  background: var(--color-secondary);
  border-radius: var(--radius-sm);
  margin-bottom: var(--space-8);
}

.skeleton-line--short {
  width: 60%;
}

.skeleton-line--medium {
  width: 80%;
}

.skeleton-meta {
  display: flex;
  gap: var(--space-8);
  margin-bottom: var(--space-16);
}

.skeleton-tag {
  width: 80px;
  height: 24px;
  background: var(--color-secondary);
  border-radius: var(--radius-sm);
}

.skeleton-actions {
  display: flex;
  gap: var(--space-8);
  margin-top: auto;
}

.skeleton-button {
  flex: 1;
  height: 36px;
  background: var(--color-secondary);
  border-radius: var(--radius-base);
}

/* Performance monitoring indicators (development only) */
.perf-indicator {
  position: fixed;
  top: 10px;
  right: 10px;
  background: rgba(0, 0, 0, 0.8);
  color: white;
  padding: var(--space-8);
  border-radius: var(--radius-base);
  font-family: monospace;
  font-size: var(--font-size-xs);
  z-index: 9999;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.perf-indicator.visible {
  opacity: 1;
}

/* Critical CSS for above-the-fold content */
.critical-content {
  /* Ensure critical content renders immediately */
  contain: layout style;
  will-change: auto;
}

/* Optimize images for performance */
img {
  /* Enable hardware acceleration for images */
  transform: translateZ(0);
  backface-visibility: hidden;
  
  /* Optimize loading */
  loading: lazy;
  decoding: async;
}

/* Critical images should load immediately */
.critical-image {
  loading: eager;
}

/* Optimize fonts for performance */
@font-face {
  font-family: 'FKGroteskNeue';
  font-display: swap; /* Improve font loading performance */
}

/* Preload critical resources */
.preload-hint {
  /* This class can be used to mark elements that should be preloaded */
  content-visibility: auto;
  contain-intrinsic-size: 300px;
}

/* Optimize for touch devices */
@media (hover: none) and (pointer: coarse) {
  .discipline-card:hover {
    /* Disable hover effects on touch devices for better performance */
    transform: none;
    box-shadow: var(--shadow-sm);
  }
  
  .btn:hover {
    transform: none;
  }
  
  .nav-link:hover {
    transform: none;
  }
}

/* Optimize scrolling performance */
.scroll-container {
  /* Enable hardware acceleration for smooth scrolling */
  -webkit-overflow-scrolling: touch;
  transform: translateZ(0);
  will-change: scroll-position;
}

/* Memory optimization for large lists */
.disciplines-grid--optimized {
  /* Use content-visibility for better memory usage */
  content-visibility: auto;
  contain-intrinsic-size: 0 400px;
}

/* Intersection observer optimizations */
.observe-visibility {
  /* Mark elements for intersection observer */
  content-visibility: auto;
  contain-intrinsic-size: 280px;
}

/* CSS Grid optimizations for better performance */
.disciplines-grid {
  /* Optimize grid calculations */
  grid-template-rows: masonry; /* Use masonry layout when supported */
}

@supports not (grid-template-rows: masonry) {
  .disciplines-grid {
    /* Fallback for browsers without masonry support */
    align-items: start;
  }
}

/* Optimize modal performance */
.modal {
  /* Use hardware acceleration for modal animations */
  transform: translateZ(0);
  backface-visibility: hidden;
  
  /* Optimize backdrop */
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

/* Reduce layout thrashing */
.no-layout-thrash {
  /* Prevent layout recalculations */
  contain: layout style paint;
  will-change: transform, opacity;
}

/* Optimize for print media */
@media print {
  .disciplines-grid {
    display: block !important;
  }
  
  .discipline-card {
    break-inside: avoid;
    margin-bottom: var(--space-16);
  }
  
  .modal,
  .loading-state,
  .empty-state {
    display: none !important;
  }
}
/* 
========================================
   Persistent Navigation Bar Component
   ======================================== */

.persistent-navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-card-border);
  box-shadow: var(--shadow-sm);
  transition: all var(--duration-normal) var(--ease-standard);
  height: 60px;
  /* Performance optimizations */
  contain: layout style paint;
  will-change: transform, opacity;
  backface-visibility: hidden;
  transform: translateZ(0);
}

.persistent-navbar__container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  padding: 0 var(--space-16);
  max-width: 1400px;
  margin: 0 auto;
  position: relative;
}

/* Brand Section */
.persistent-navbar__brand {
  display: flex;
  align-items: center;
  gap: var(--space-12);
  flex-shrink: 0;
  min-width: 0;
}

.persistent-navbar__logo {
  height: 36px;
  width: auto;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-primary);
  padding: var(--space-2);
  background: var(--color-bg-1);
  transition: transform var(--duration-fast) var(--ease-standard);
}

.persistent-navbar__logo:hover {
  transform: scale(1.05);
}

.persistent-navbar__brand-text {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.persistent-navbar__title {
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text);
  line-height: 1.2;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.persistent-navbar__subtitle {
  font-size: var(--font-size-xs);
  color: var(--color-text-secondary);
  line-height: 1;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* Navigation Menu */
.persistent-navbar__nav {
  flex: 1;
  display: flex;
  justify-content: center;
  min-width: 0;
}

.persistent-navbar__menu {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  list-style: none;
  margin: 0;
  padding: 0;
  flex-wrap: nowrap;
  overflow-x: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
}

.persistent-navbar__menu::-webkit-scrollbar {
  display: none;
}

.persistent-navbar__item {
  flex-shrink: 0;
}

.persistent-navbar__link {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  padding: var(--space-6) var(--space-12);
  border-radius: var(--radius-base);
  color: var(--color-text-secondary);
  text-decoration: none;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  transition: all var(--duration-fast) var(--ease-standard);
  border: 1px solid transparent;
  white-space: nowrap;
  position: relative;
}

.persistent-navbar__link:hover {
  color: var(--color-primary);
  background: var(--color-bg-1);
  border-color: rgba(var(--color-primary-rgb), 0.2);
  transform: translateY(-1px);
}

.persistent-navbar__link:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

.persistent-navbar__link--active {
  color: var(--color-primary);
  background: var(--color-bg-1);
  border-color: var(--color-primary);
  font-weight: var(--font-weight-semibold);
}

.persistent-navbar__link--active::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 50%;
  transform: translateX(-50%);
  width: 20px;
  height: 2px;
  background: var(--color-primary);
  border-radius: 1px;
}

.persistent-navbar__icon {
  font-size: var(--font-size-base);
  flex-shrink: 0;
}

.persistent-navbar__text {
  font-size: var(--font-size-sm);
  line-height: 1;
}

/* Controls Section */
.persistent-navbar__controls {
  display: flex;
  align-items: center;
  gap: var(--space-8);
  flex-shrink: 0;
}

.persistent-navbar__toggle,
.persistent-navbar__mobile-menu {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-base);
  background: var(--color-surface);
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease-standard);
  padding: 0;
}

.persistent-navbar__toggle:hover,
.persistent-navbar__mobile-menu:hover {
  color: var(--color-primary);
  border-color: var(--color-primary);
  background: var(--color-bg-1);
}

.persistent-navbar__toggle:focus-visible,
.persistent-navbar__mobile-menu:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

.persistent-navbar__toggle--active {
  color: var(--color-primary);
  border-color: var(--color-primary);
  background: var(--color-bg-1);
}

/* Toggle Icon */
.persistent-navbar__toggle-icon {
  display: flex;
  flex-direction: column;
  gap: 2px;
  width: 16px;
  height: 12px;
}

.persistent-navbar__toggle-icon span {
  display: block;
  height: 2px;
  background: currentColor;
  border-radius: 1px;
  transition: all var(--duration-fast) var(--ease-standard);
}

.persistent-navbar__toggle--active .persistent-navbar__toggle-icon span:nth-child(1) {
  transform: rotate(45deg) translate(3px, 3px);
}

.persistent-navbar__toggle--active .persistent-navbar__toggle-icon span:nth-child(2) {
  opacity: 0;
}

.persistent-navbar__toggle--active .persistent-navbar__toggle-icon span:nth-child(3) {
  transform: rotate(-45deg) translate(3px, -3px);
}

/* Hamburger Icon */
.persistent-navbar__hamburger {
  display: flex;
  flex-direction: column;
  gap: 3px;
  width: 18px;
  height: 14px;
}

.persistent-navbar__hamburger span {
  display: block;
  height: 2px;
  background: currentColor;
  border-radius: 1px;
  transition: all var(--duration-normal) var(--ease-standard);
}

.persistent-navbar--expanded .persistent-navbar__hamburger span:nth-child(1) {
  transform: rotate(45deg) translate(4px, 4px);
}

.persistent-navbar--expanded .persistent-navbar__hamburger span:nth-child(2) {
  opacity: 0;
  transform: translateX(-20px);
}

.persistent-navbar--expanded .persistent-navbar__hamburger span:nth-child(3) {
  transform: rotate(-45deg) translate(4px, -4px);
}

/* Current Activity Indicator */
.persistent-navbar__current-activity {
  display: none;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-4) var(--space-8);
  background: var(--color-bg-2);
  border-radius: var(--radius-sm);
  font-size: var(--font-size-xs);
  color: var(--color-text-secondary);
  border: 1px solid rgba(var(--color-warning-rgb), 0.2);
  position: absolute;
  right: var(--space-16);
  top: 50%;
  transform: translateY(-50%);
  z-index: 1;
}

.persistent-navbar__activity-label {
  font-weight: var(--font-weight-medium);
}

.persistent-navbar__activity-name {
  font-weight: var(--font-weight-semibold);
  color: var(--color-warning);
}

/* State Variations */

/* Hidden State */
.persistent-navbar--hidden {
  transform: translateY(-100%);
  opacity: 0;
  pointer-events: none;
}

/* Compact State */
.persistent-navbar--compact {
  height: 40px;
}

.persistent-navbar--compact .persistent-navbar__logo {
  height: 28px;
}

.persistent-navbar--compact .persistent-navbar__title {
  font-size: var(--font-size-sm);
}

.persistent-navbar--compact .persistent-navbar__subtitle {
  display: none;
}

.persistent-navbar--compact .persistent-navbar__link {
  padding: var(--space-4) var(--space-8);
  font-size: var(--font-size-xs);
}

.persistent-navbar--compact .persistent-navbar__text {
  display: none;
}

.persistent-navbar--compact .persistent-navbar__toggle,
.persistent-navbar--compact .persistent-navbar__mobile-menu {
  width: 28px;
  height: 28px;
}

/* Auto-hide State */
.persistent-navbar--auto-hide {
  transition: all var(--duration-normal) var(--ease-standard);
}

.persistent-navbar--auto-hide:not(:hover):not(:focus-within) {
  transform: translateY(-80%);
  opacity: 0.8;
}

.persistent-navbar--auto-hide:not(:hover):not(:focus-within) .persistent-navbar__container {
  padding-top: var(--space-4);
}

/* Fullscreen State */
.persistent-navbar--fullscreen {
  display: none;
}

.persistent-navbar--fullscreen.persistent-navbar--visible {
  display: flex;
  position: absolute;
  top: 0;
  background: rgba(var(--color-surface-rgb, 255, 255, 253), 0.95);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

/* Mobile Responsive */
.persistent-navbar--mobile {
  height: 56px;
}

.persistent-navbar--mobile .persistent-navbar__nav {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-card-border);
  box-shadow: var(--shadow-lg);
  transform: translateY(-100%);
  opacity: 0;
  visibility: hidden;
  transition: all var(--duration-normal) var(--ease-standard);
  z-index: -1;
}

.persistent-navbar--mobile.persistent-navbar--expanded .persistent-navbar__nav {
  transform: translateY(0);
  opacity: 1;
  visibility: visible;
}

.persistent-navbar--mobile .persistent-navbar__menu {
  flex-direction: column;
  align-items: stretch;
  gap: 0;
  padding: var(--space-8);
  overflow-x: visible;
}

.persistent-navbar--mobile .persistent-navbar__item {
  width: 100%;
}

.persistent-navbar--mobile .persistent-navbar__link {
  justify-content: flex-start;
  padding: var(--space-12) var(--space-16);
  border-radius: var(--radius-base);
  width: 100%;
}

.persistent-navbar--mobile .persistent-navbar__link--active::after {
  display: none;
}

.persistent-navbar--mobile .persistent-navbar__text {
  display: block;
}

.persistent-navbar--mobile .persistent-navbar__toggle {
  display: none;
}

.persistent-navbar--mobile .persistent-navbar__current-activity {
  display: none;
}

/* Desktop Responsive */
.persistent-navbar--desktop .persistent-navbar__mobile-menu {
  display: none;
}

.persistent-navbar--desktop .persistent-navbar__current-activity {
  display: flex;
}

/* Activity Context */
.activity-context .persistent-navbar {
  position: relative;
  z-index: 999;
}

.activity-context .persistent-navbar__current-activity {
  display: flex;
}

/* Responsive Breakpoints */
@media (max-width: 768px) {
  .persistent-navbar__brand-text {
    display: none;
  }
  
  .persistent-navbar__container {
    padding: 0 var(--space-12);
  }
  
  .persistent-navbar__controls {
    gap: var(--space-4);
  }
}

@media (max-width: 480px) {
  .persistent-navbar {
    height: 48px;
  }
  
  .persistent-navbar--mobile {
    height: 48px;
  }
  
  .persistent-navbar__logo {
    height: 32px;
  }
  
  .persistent-navbar__container {
    padding: 0 var(--space-8);
  }
  
  .persistent-navbar__toggle,
  .persistent-navbar__mobile-menu {
    width: 32px;
    height: 32px;
  }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
  .persistent-navbar {
    border-bottom: 2px solid var(--color-text);
  }
  
  .persistent-navbar__link {
    border: 1px solid var(--color-text);
  }
  
  .persistent-navbar__toggle,
  .persistent-navbar__mobile-menu {
    border: 2px solid var(--color-text);
  }
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
  .persistent-navbar,
  .persistent-navbar__nav,
  .persistent-navbar__link,
  .persistent-navbar__toggle-icon span,
  .persistent-navbar__hamburger span {
    transition: none !important;
    animation: none !important;
  }
  
  .persistent-navbar__link:hover {
    transform: none;
  }
  
  .persistent-navbar--auto-hide:not(:hover):not(:focus-within) {
    transform: none;
  }
}

/* Print styles */
@media print {
  .persistent-navbar {
    display: none !important;
  }
}

/* Dark mode adjustments */
@media (prefers-color-scheme: dark) {
  .persistent-navbar {
    background: var(--color-surface);
    border-bottom-color: var(--color-card-border);
  }
  
  .persistent-navbar--fullscreen {
    background: rgba(var(--color-surface-rgb, 38, 40, 40), 0.95);
  }
}

/* Focus management for accessibility */
.persistent-navbar:focus-within {
  z-index: 1001;
}

.persistent-navbar__link:focus {
  z-index: 1;
}

/* Screen reader announcements */
.persistent-navbar .sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Loading state for navbar */
.persistent-navbar--loading {
  pointer-events: none;
}

.persistent-navbar--loading .persistent-navbar__link {
  opacity: 0.6;
}

/* Error state */
.persistent-navbar--error {
  background: rgba(var(--color-error-rgb), 0.1);
  border-bottom-color: var(--color-error);
}

/* Success state */
.persistent-navbar--success {
  background: rgba(var(--color-success-rgb), 0.1);
  border-bottom-color: var(--color-success);
}