body {
  min-height: 100vh;
  display: flex;
  align-items: center;
  margin: 0;
}

.container {
  background-color: #5a5c68;
  min-width: 320px;
  padding: 20px;
  border-radius: 5px;
  margin: auto;
}

.symbols {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr 1fr;
  grid-column-gap: 20px;
  grid-row-gap: 20px;
  text-align: center;
}

.symbols > div {
  background-color: #3d4049;
  border-radius: 5px;
  color: #fff;
  font-size: 2em;
  padding: 5px;
  line-height: 2em;
  cursor: pointer;
}

.symbols > .symbol {
  background-color: #bcc0c7;
}

.result {
  margin-bottom: 1em;
  line-height: 45px;
  height: 45px;
  background-color: #c1d798;
  border-radius: 5px;
  font-size: 26px;
  padding: 0 10px;
  color: #fff;
}