board.css

body {
  background-color: black;
}

.game-container {
  margin: 0 auto;
  width: 424px;
  border: 2px solid #dadada;
  /* margin-left: auto; */
  /* margin-right: auto; */
}

input#message {
  border: 2px solid #dadada;
  border-radius: 7px;
}

input#message:focus {
  outline: none;
  border-color: #9ecaed;
  box-shadow: 0 0 10px #9ecaed;
}

.encoding {
  /* text-shadow: 0 0 10px rgba(255,255,255,1) , 0 0 20px rgba(255,255,255,1) , 0 -6px 30px rgba(255,255,255,1) , 0 0 40px #ff00de , 0 0 70px #ff00de , 0 0 80px #ff00de , 0 0 100px #ff00de ; */
  border: 2px solid #73ad21;
  padding: 2px;
}
.code-popup {
  visibility: hidden;
  display: inline-block;
  width: 5em;
  text-align: center;
  background: black;
  border:solid 2px #73ad21;
  border-radius: 6px;
  position: absolute;
  bottom: -1em;
  z-index: 1;
  color: #b44f47;
  padding: .2em;
}
.encoded-token:hover .code-popup {
  visibility: visible;
}

.highlight-token {
  color: #b44f47;
}

.encoded-token {
  cursor: pointer;
  position: relative;
}

#board {
  height: 800px;
  width: 416px;
  background-color: black;
  position: relative;
  touch-action: manipulation;
}

.move-button {
  touch-action: manipulation;
  cursor: pointer;
}

@media (pointer:fine){
  .hint-message.mobile {
    display: none;
  }
  .move-button.mobile {
    display: none;
  }
}

@media (pointer:none), (pointer:coarse) {
  .hint-message.desktop {
    display: none;
  }
}