.kalkulator {
  margin: 20px 0;
}
.kalkulator label {
  display: block;
  margin-bottom: 8px;
}
.kalkulator input {
  width: 100%;
  padding: 8px;
  margin-top: 4px;
}
.kalkulator button {
  background-color: red;
  color: white;
  padding: 10px 20px;
  margin-top: 10px;
  border: none;
  cursor: pointer;
}
.kalkulator .info {
  margin-top: 16px;
  font-size: 0.9em;
  color: #555;
}

.kalkulator .opis {
  margin-bottom: 10px;
  font-style: italic;
  font-size: 0.95em;
  color: #444;
}