:root {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  line-height: 1.5;
  font-weight: 400;
  color-scheme: light dark;
  color: rgba(255, 255, 255, 0.87);
  background-color: #242424;
}

body {
  margin: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  background-color: #1a1a1a;
}

.animate-fade-in {
  animation: fadeIn 0.6s cubic-bezier(0.22, 1, 0.36, 1) forwards;
}

.animate-pop-in {
  animation: popIn 0.4s cubic-bezier(0.34, 1.56, 0.64, 1) forwards;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }

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

@keyframes popIn {
  from {
    opacity: 0;
    transform: scale(0.9);
  }

  to {
    opacity: 1;
    transform: scale(1);
  }
}

/* Level Buttons */
.level-btn {
  color: rgba(255, 255, 255, 0.6);
  cursor: pointer;
}

.level-btn:hover {
  color: white;
  background: rgba(255, 255, 255, 0.05);
}

.level-btn.active {
  background: #3b82f6;
  color: white;
  box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
}

.puzzle-piece {
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
  border-radius: 12px;
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.2);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.puzzle-piece:hover {
  transform: scale(1.02);
  z-index: 10;
  box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.2), 0 10px 10px -5px rgba(0, 0, 0, 0.1);
  filter: brightness(1.1);
}

.puzzle-piece.empty {
  background: rgba(255, 255, 255, 0.05);
  box-shadow: inset 0 2px 4px 0 rgba(0, 0, 0, 0.06);
  cursor: default;
}

.puzzle-piece.empty:hover {
  transform: none;
  filter: none;
}

/* Modal Animation */
#original-modal.show {
  display: flex !important;
  opacity: 1;
}

#original-modal.show>div {
  transform: scale(1);
}

#puzzle-board {
  transition: all 0.5s ease-in-out;
}

/* Glassmorphism Effect */
#game-container {
  background: rgba(42, 42, 42, 0.85);
  backdrop-filter: blur(25px);
  -webkit-backdrop-filter: blur(25px);
  border: 1px solid rgba(255, 255, 255, 0.1);
}