#simon-card {
  background-color: #fff;
  border: 2px solid #000;
  padding: 30px;
  margin: 40px auto;
  width: max-content;
  text-align: center;
  transition: transform 0.3s, background-color 0.3s;
}

#simon-card:hover {
  background-color: #eee;
}

#game {
  display: grid;
  grid-template-columns: repeat(2, 100px);
  grid-template-rows: repeat(2, 100px);
  gap: 15px;
  justify-content: center;
  margin: 20px auto;
}

.tile {
  width: 100px;
  height: 100px;
  border-radius: 12px;
  border: 2px solid #000;
  font-size: 22px;
  font-weight: bold;
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: transform 0.2s, filter 0.2s;
}

#green    { background-color: #28a745; }
#red      { background-color: #dc3545; }
#yellow   { background-color: #ffc107; color: #222; }
#blue     { background-color: #007bff; }

.tile.highlight {
  filter: brightness(1.5);
  transform: scale(1.1);
}

#message, #level {
  margin-top: 15px;
  font-size: 18px;
  color: #555;
}

  #fluid-canvas {
    position: fixed;
    top: 0;
    left: 0;
    z-index: 0;
    width: 100vw;
    height: 100vh;
  }

  body, main, header, footer {
    position: relative;
    z-index: 1;
  }

nav a button {
  position: relative;
  z-index: 2;
}