#kalkulacka-wrapper {
  max-width: 700px;
  margin: auto;
  font-family: 'Segoe UI', sans-serif;
  background: #1a1a1a;
  padding: 20px;
  border-radius: 12px;
  color: #facc15;
  box-shadow: 0 0 15px rgba(255, 255, 0, 0.2);
}
.kalkulacka-section {
  margin-bottom: 20px;
}
.kalkulacka-section h2 {
  color: #facc15;
}
.kalkulacka-section button,
.kalkulacka-section input,
.kalkulacka-section span {
  margin: 5px;
  padding: 10px;
  font-size: 16px;
}
.kalkulacka-section button {
  background: #facc15;
  color: #1a1a1a;
  border: none;
  cursor: pointer;
  border-radius: 6px;
}
.kalkulacka-section button.active-btn,
#farbyWrapper span.active-btn {
  background: #fff200;
  font-weight: bold;
  border: 2px solid #facc15;
}
.kalkulacka-section input {
  border: 2px solid #facc15;
  background: #111;
  color: #facc15;
  border-radius: 6px;
}
#farbyWrapper span {
  background: #facc15;
  color: #1a1a1a;
  cursor: pointer;
  padding: 6px 10px;
  margin-right: 6px;
  border-radius: 6px;
  display: inline-block;
}