html,
body {
  background-color: #fff;
  font-family: "Helvetica", "Arial", "Verdana", sans-serif;
  margin: 0;
  padding: 0;
}

.app-container {
  max-width: 100%;
  overflow: hidden;
}

.header {
  background-color: #369;
  padding: 10px 0;
}

.header > h1 {
  color: #fff;
  font-size: 24px;
  font-weight: 400;
  margin: 0;
  text-align: center;
}

.container {
  margin: 0 auto;
  padding: 20px 0;
  text-align: center;
  user-select: none;
  width: 350px;
}

textarea {
  border-radius: 6px;
  font-size: 20px;
  padding: 10px;
  resize: none;
  text-align: center;
  width: calc(100% - 22px);
}

.letters {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 10px;
}

.letters > div {
  background-color: #369;
  border-radius: 6px;
  border: 1px solid #0005;
  color: #fff;
  cursor: pointer;
  width: 60px;
}

.letters > div:not(.on-board):hover {
  background-color: #47a;
}

.letters > div:not(.on-board):active {
  background-color: #258;
}

.letter {
  border-bottom: 1px solid #0005;
  font-size: 18px;
  line-height: 32px;
  text-transform: uppercase;
}

.probability {
  font-size: 13px;
  line-height: 24px;
}

.letters > div.on-board {
  cursor: default;
  opacity: 0.5;
}

.letters > div.crossed-off {
  background-color: #900;
}

.letters > div.crossed-off:hover {
  background-color: #a11;
}

.letters > div.crossed-off:active {
  background-color: #800;
}

.crossed-off > .letter {
  text-decoration: line-through;
}

.letters > div.suggested {
  background-color: #538d4e;
}

.letters > div.suggested:hover {
  background-color: #695;
}

.letters > div.suggested:active {
  background-color: #473;
}