@keyframes tilt-shaking {
  0% {
    transform: rotate(0deg);
  }
  25% {
    transform: rotate(5deg);
  }
  50% {
    transform: rotate(0eg);
  }
  75% {
    transform: rotate(-5deg);
  }
  100% {
    transform: rotate(0deg);
  }
}

@keyframes blink {
  0% {
    color: red;
  }
  20% {
    color: green;
  }
  40% {
    color: yellow;
  }
  60% {
    color: blue;
  }
  80% {
    color: orange;
  }
  100% {
    color: red;
  }
}

.puzzle-letter.selected, .puzzle-letter:hover {
  color: #fff;
}

.puzzle-letter {
  display: inline-block;
  cursor: pointer;
  transition: font-size .2s ease-out;
}

.puzzle-letter.selected {
  background-color: #f91f1f;
}

.puzzle-letter:hover {
  background-color: #bbb;
}

.puzzle-letter:hover.possible {
  background-color: #00c851;
}

#xmas-puzzle-title {
  transition: background-color .2s linear;
  display: none;
  padding: 0.5em;
  font-size: 3em;
  color: #fff;
  background-color: rgba(249, 31, 31, 0.2);
  position: absolute;
  top: 10px;
  left: calc(50% - 100px);
  border-radius: 5px;
}

#xmas-puzzle-title .current-flags {
  margin-left: 1em;
}

#xmas-puzzle-title .possible-flags {
  margin-left: 1em;
  opacity: 0.3;
}

#xmas-puzzle-title.success {
  cursor: pointer;
  color: #00a4e4;
  background-color: rgba(0, 200, 81, 0.2);
  animation: blink 1s infinite;
}

#xmas-puzzle-title.success-animation {
  animation: tilt-shaking .3s;
}

#iframe-container {
  position: absolute;
  top: 200px;
  left: calc(50% - 300px);
}