html,
body {
  font-family: Helvetica;
  margin: 0;
  padding: 0 0 30px 0;
  text-align: center;
}

h1,
#message-panel,
#tile-board,
#visual-keyboard {
  text-align: center;
}

#message-panel {
  line-height: 1em;
  min-height: 1em;
}

.row {
  display: flex;
  justify-content: center;
}

.tile {
  align-items: center;
  border: 2px solid lightgray;
  display: flex;
  font-size: 32px;
  font-weight: 700;
  justify-content: center;
  margin: 3px;
  min-height: 62px;
  min-width: 62px;
  transition: background-color 0.5s;
}

.letter-green {
  background-color: #6aaa64;
  color: white;
}

.letter-yellow {
  background-color: #c9b458;
  color: white;
}

.letter-gray {
  background-color: #86888a;
  color: white;
}

#visual-keyboard {
  margin-top: 20px;
}

button {
  background-color: rgb(211,214,218);
  border: 0;
  border-radius: 5px;
  display: inline-block;
  font-weight: 700;
  height: 58px;
  margin: 4px 1px 4px 1px;
  width: 43px;
  outline: 0;
}