:root {
  --calculator-input-padding: 10px 12px;
  --calculator-input-radius: 10px;
  --calculator-button-padding: 10px 12px;
  --calculator-button-radius: 10px;
}

.calculator-ui label {
  font-size: 14px;
  color: var(--muted-text);
  display: block;
  margin-bottom: 6px;
}

.calculator-ui input[type="number"] {
  width: 100%;
  padding: var(--calculator-input-padding);
  border-radius: var(--calculator-input-radius);
  border: 1px solid var(--border-color);
  font-size: 16px;
}

.calculator-ui .helper {
  color: var(--muted-text);
  margin-bottom: 16px;
  font-size: 14px;
}

.calculator-ui .input-stack {
  display: grid;
  gap: 16px;
  margin-bottom: 16px;
}

.calculator-ui .calculator-toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
  margin-bottom: 16px;
}

.calculator-ui .toolbar-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.calculator-ui .button-row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-top: 16px;
}

.calculator-ui .calculator-button {
  padding: var(--calculator-button-padding);
  border-radius: var(--calculator-button-radius);
  border: none;
  background: #2563eb;
  color: #fff;
  font-weight: 600;
  cursor: pointer;
}

.calculator-ui .calculator-button.secondary {
  background: #e2e8f0;
  color: #1f2937;
}

.calculator-ui .calculator-button:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.calculator-ui .result {
  margin-top: 18px;
  font-size: 18px;
  font-weight: 600;
  min-height: 60px;
}

.calculator-ui .result-detail {
  font-size: 14px;
  color: var(--muted-text);
  margin-top: 8px;
  font-weight: 400;
}

.calculator-ui .mode-selector {
  display: flex;
  gap: 8px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}

.calculator-ui .mode-button {
  padding: 8px 16px;
  border-radius: 8px;
  border: 1px solid var(--border-color);
  background: var(--panel-bg);
  color: #1f2937;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
}

.calculator-ui .mode-button:hover {
  background: #f1f5f9;
}

.calculator-ui .mode-button.active {
  background: #2563eb;
  color: #fff;
  border-color: #2563eb;
}

.calculator-ui .input-section {
  display: none;
  animation: calculatorFadeIn 0.3s;
}

.calculator-ui .input-section.active {
  display: block;
}

@keyframes calculatorFadeIn {
  from {
    opacity: 0;
  }

  to {
    opacity: 1;
  }
}

.calculator-ui .calculate {
  width: 100%;
}