code {
  background-color: #f8f8f8;
  font-size: 0.94em;
  padding: 0 3px;
}

input, select, button {
  font-size: 1.1rem;
}

input {
  text-align: center;
}

.marker {
  position: absolute;
  left: -1.2em;
  font-size: 1.3em;
}

.result {
  margin-top: 20px;
}

.step {
  color: #333;
  list-style: none;
  opacity: 0.6;
  position: relative;
}

.step.executed {
  opacity: 1;
}

.error {
  color: red;
  text-align: center;
}

.operation {
  border: 2px solid;
  padding: 0.5em;
  text-align: center;
  font-size: 1.2em;
  margin-top: .7em;
  font-family: Consolas, "Liberation Mono", Menlo, Courier, monospace !important;
}

.operation input {
  border: 1px solid #00000033;
  min-width: 15em;
}

.operation.yes {
  border-color: green;
}

.operation.no {
  border-color: red;
}

.operation.yes input,
.operation.yes {
  background-color: #90ee90;
}

.operation.no input,
.operation.no {
  background-color: #ffb6c1;
}