/* Fullscreen Controls */
.fullscreen-controls {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 10000;
}

.fullscreen-btn {
  background: linear-gradient(135deg, #4ecdc4, #2a9d8f);
  border: none;
  border-radius: 25px;
  padding: 12px 20px;
  color: white;
  font-weight: bold;
  cursor: pointer;
  box-shadow: 0 4px 15px rgba(0,0,0,0.2);
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  gap: 8px;
  z-index: 10001;
}

.fullscreen-btn:hover {
  transform: scale(1.05);
  box-shadow: 0 6px 20px rgba(0,0,0,0.3);
}

.fullscreen-icon {
  font-size: 1.2em;
}

/* Fullscreen styles */
body:fullscreen {
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

body:-webkit-full-screen {
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

body:-moz-full-screen {
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

body:-ms-fullscreen {
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

/* Enhanced fullscreen canvas wrapper */
.canvas-wrapper:fullscreen {
  width: 100vw;
  height: 100vh;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  padding: 40px;
  overflow-y: auto;
}

.canvas-wrapper:-webkit-full-screen {
  width: 100vw;
  height: 100vh;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  padding: 40px;
  overflow-y: auto;
}

.canvas-wrapper:-moz-full-screen {
  width: 100vw;
  height: 100vh;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  padding: 40px;
  overflow-y: auto;
}

.canvas-wrapper:-ms-fullscreen {
  width: 100vw;
  height: 100vh;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  padding: 40px;
  overflow-y: auto;
}

/* Fullscreen content scaling */
:fullscreen .MainShape-container,
:fullscreen .lesson-container,
:fullscreen .lesson3D,
:fullscreen #quizSection {
  transform: scale(1.1);
  max-width: 90vw;
  margin: 0 auto;
}

:-webkit-full-screen .MainShape-container,
:-webkit-full-screen .lesson-container,
:-webkit-full-screen .lesson3D,
:-webkit-full-screen #quizSection {
  transform: scale(1.1);
  max-width: 90vw;
  margin: 0 auto;
}

/* Enhanced fullscreen shapes */
:fullscreen .shape-container {
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 25px;
}

:fullscreen .shape {
  transform: scale(1.15);
  transition: transform 0.3s ease;
}

:fullscreen .shape:hover {
  transform: scale(1.25);
}

/* Fullscreen quiz enhancements */
:fullscreen #quizSection {
  max-width: 80vw;
  padding: 30px;
  background: rgba(255, 255, 255, 0.95);
  border-radius: 20px;
  margin: 20px auto;
}

:fullscreen .quiz-type {
  padding: 30px;
  font-size: 1.1em;
}

/* Mobile fullscreen optimizations */
@media (max-width: 768px) {
  .fullscreen-controls {
    top: 10px;
    right: 10px;
  }
  
  .fullscreen-btn {
    padding: 10px 16px;
    font-size: 0.9em;
  }
  
  .fullscreen-text {
    display: none; /* Hide text on mobile, show only icon */
  }
  
  :fullscreen .canvas-wrapper {
    padding: 20px;
  }
  
  :fullscreen .MainShape-container,
  :fullscreen .lesson-container,
  :fullscreen .lesson3D,
  :fullscreen #quizSection {
    transform: scale(1);
    max-width: 95vw;
  }
  
  :fullscreen .shape-container {
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 15px;
  }
}

/* Exit fullscreen button styling */
body:fullscreen .fullscreen-btn,
body:-webkit-full-screen .fullscreen-btn,
body:-moz-full-screen .fullscreen-btn,
body:-ms-fullscreen .fullscreen-btn {
  background: linear-gradient(135deg, #ff6b6b, #ff8e53);
}

body:fullscreen .fullscreen-icon,
body:-webkit-full-screen .fullscreen-icon,
body:-moz-full-screen .fullscreen-icon,
body:-ms-fullscreen .fullscreen-icon {
  content: "⛶";
}

body:not(:fullscreen) .fullscreen-icon {
  content: "⛶";
}

/* Fullscreen animation */
@keyframes fullscreenEnter {
  0% {
    opacity: 0;
    transform: scale(0.9);
  }
  100% {
    opacity: 1;
    transform: scale(1);
  }
}

:fullscreen .canvas-wrapper {
  animation: fullscreenEnter 0.5s ease-out;
}

/* Scrollbar styling for fullscreen */
:fullscreen ::-webkit-scrollbar {
  width: 12px;
}

:fullscreen ::-webkit-scrollbar-track {
  background: rgba(255, 255, 255, 0.1);
  border-radius: 10px;
}

:fullscreen ::-webkit-scrollbar-thumb {
  background: linear-gradient(135deg, #4ecdc4, #2a9d8f);
  border-radius: 10px;
}

:fullscreen ::-webkit-scrollbar-thumb:hover {
  background: linear-gradient(135deg, #ff6b6b, #ff8e53);
}