#puzzle-container {
  display: none;
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(8px) grayscale(0.5);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 1001;
  font-family: 'Creepster', cursive;
}

#puzzle-box {
  display: flex;
  gap: 50px;
  padding: 30px;
  background: #0d0d0d;
  border: 1px solid #333;
  box-shadow: 0 0 30px rgba(0,0,0,0.8);
  position: relative;
  overflow: hidden;
}

#puzzle-box::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: repeating-linear-gradient(0deg, transparent, transparent 2px, rgba(0,0,0,0.5) 3px);
  pointer-events: none;
  z-index: 1;
}

#puzzle-board {
  display: flex;
  flex-wrap: wrap;
  /* width: 550px; 
  height: 550px; */
  gap: 2px;
  align-content: flex-start; 
  border: 2px solid #ff0000;
  padding: 10px;
  background: #1a1a1a;
  box-shadow: 0 0 15px rgba(255, 0, 0, 0.5);
}

.puzzle-tile {
  /* Calculate the size of each tile based on the container width and number of columns.
    The 'calc' function lets us do math right in the CSS.
    var(--grid-cols) is the variable we set in JavaScript.
  */
  flex-basis: calc((100% / var(--grid-cols, 8)) - 2px); /* Subtract the gap size */
  aspect-ratio: 1 / 1;
  cursor: pointer;
  transition: all 0.1s;
  position: relative;
  overflow: hidden;
  transition: all 0.1s, transform 0.2s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.tile-pop {
  transform: scale(1.2);
}

.puzzle-tile::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: repeating-linear-gradient(0deg, rgba(0,0,0,0.2), rgba(0,0,0,0.2) 1px, transparent 1px, transparent 3px);
  pointer-events: none;
}

.puzzle-tile:hover {
  transform: scale(1.05);
  box-shadow: 0 0 15px rgba(255, 255, 255, 0.8);
  z-index: 2;
}

#puzzle-controls {
  display: flex;
  flex-direction: column;
  align-items: center;
  color: #fff;
  text-align: center;
  width: 280px;
}

/* Styling of the objective text and effect*/
#puzzle-objective {
  font-size: 2.2em;
  color: #5a0404;
  text-shadow: 2px 2px #000000, -2px -2px #ffffff;
}

#puzzle-controls p {
  font-family: 'Courier New', Courier, monospace;
  font-size: 1.1em;
  color: #aaa;
  letter-spacing: 1px;
}

#puzzle-timer {
  font-family: 'Courier New', Courier, monospace;
  font-size: 1.5em;
  color: #ff0000;
  margin-top: 20px;
  text-shadow: 0 0 8px #ff0000;
}

#color-palette {
  display: flex;
  justify-content: center;
  flex-wrap: wrap; 
  gap: 15px;
  margin: 30px 0;
}

.color-option {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  cursor: pointer;
  transition: all 0.2s ease;
  border: 3px solid #444;
  box-shadow: inset 0 0 10px #000;
}

.color-option:hover {
  border-color: #fff;
  transform: scale(1.1);
}

.color-option.selected {
  transform: scale(1.1);
  border-color: #00ffff;
  box-shadow: 0 0 20px #00ffff, inset 0 0 10px #000;
  animation: pulse 1.5s infinite;
}

.puzzle-buttons {
  margin-top: auto;
  display: flex;
  gap: 15px;
}

#color-palette.locked {
  pointer-events: none;
  opacity: 0.5;
  transition: opacity 0.3s ease-out;
}

#reset-puzzle-btn,
#close-puzzle-btn {
  font-family: 'Courier New', Courier, monospace;
  font-size: 1em;
  text-transform: uppercase;
  color: #aaa;
  background: transparent;
  border: 2px solid #555;
  padding: 8px 15px;
  cursor: pointer;
  transition: all 0.3s;
}

#reset-puzzle-btn:hover,
#close-puzzle-btn:hover {
  color: #fff;
  background: #300;
  border-color: #f00;
  text-shadow: 0 0 5px #f00;
}

@keyframes pulse {
  0% {
    box-shadow: 0 0 10px #00ffff, inset 0 0 10px #000;
  }
  50% {
    box-shadow: 0 0 25px #00ffff, inset 0 0 10px #000;
  }
  100% {
    box-shadow: 0 0 10px #00ffff, inset 0 0 10px #000;
  }
}