/* ============================================
   Calculator Styles — Forms, Results, Scoring
   ============================================ */

/* ---- Calculator Layout ---- */
.calculator {
  max-width: var(--max-width-narrow);
}

.calculator__description {
  color: var(--color-text-secondary);
  margin-bottom: var(--space-6);
  font-size: var(--text-base);
  line-height: var(--leading-relaxed);
}

.calculator__references {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-bottom: var(--space-8);
}

.calculator__ref-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  font-size: var(--text-xs);
  color: var(--color-accent-text);
  background: var(--color-accent-subtle);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  text-decoration: none;
  transition: background var(--transition-fast);
}

.calculator__ref-link:hover {
  background: var(--color-accent-light);
  color: var(--color-accent-hover);
}

.calculator__ref-link::before {
  content: '📋';
  font-size: var(--text-xs);
}

/* ---- Form Fields ---- */
.calc-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.calc-field {
  display: flex;
  align-items: center;
  padding: var(--space-4) var(--space-5);
  border-bottom: 1px solid var(--color-border-light);
  gap: var(--space-4);
  transition: background var(--transition-fast);
}

.calc-field:first-child {
  border-top: 1px solid var(--color-border-light);
}

.calc-field:hover {
  background: var(--color-bg-hover);
}

.calc-field__label {
  flex: 1;
  font-size: var(--text-base);
  font-weight: var(--weight-medium);
  color: var(--color-text-primary);
  min-width: 0;
}

.calc-field__label-hint {
  display: block;
  font-size: var(--text-xs);
  font-weight: var(--weight-normal);
  color: var(--color-text-tertiary);
  margin-top: var(--space-1);
}

.calc-field__input-wrap {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

/* Number Input */
.calc-field__number {
  width: 100px;
  padding: var(--space-2) var(--space-3);
  background: var(--color-bg-input);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-family: var(--font-sans);
  font-size: var(--text-base);
  color: var(--color-text-primary);
  text-align: right;
  outline: none;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  -moz-appearance: textfield;
}

.calc-field__number::-webkit-inner-spin-button,
.calc-field__number::-webkit-outer-spin-button {
  -webkit-appearance: none;
  margin: 0;
}

.calc-field__number:focus {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px var(--color-accent-subtle);
}

.calc-field__unit {
  font-size: var(--text-sm);
  color: var(--color-text-tertiary);
  min-width: 40px;
}

/* Select Input */
.calc-field__select {
  padding: var(--space-2) var(--space-8) var(--space-2) var(--space-3);
  background: var(--color-bg-input);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  color: var(--color-text-primary);
  outline: none;
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%236B6560' d='M6 8.5L1 3.5h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 10px center;
  max-width: 280px;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.calc-field__select:focus {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px var(--color-accent-subtle);
}

/* Checkbox */
.calc-field__checkbox-wrap {
  position: relative;
  display: flex;
  align-items: center;
}

.calc-field__checkbox {
  appearance: none;
  width: 22px;
  height: 22px;
  border: 2px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-bg-input);
  cursor: pointer;
  transition: all var(--transition-fast);
  position: relative;
}

.calc-field__checkbox:checked {
  background: var(--color-accent);
  border-color: var(--color-accent);
}

.calc-field__checkbox:checked::after {
  content: '';
  position: absolute;
  left: 6px;
  top: 2px;
  width: 6px;
  height: 11px;
  border: solid white;
  border-width: 0 2px 2px 0;
  transform: rotate(45deg);
}

.calc-field__checkbox:focus-visible {
  box-shadow: 0 0 0 3px var(--color-accent-subtle);
}

/* Radio Group */
.calc-field--radio {
  flex-direction: column;
  align-items: stretch;
}

.calc-field__radio-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  margin-top: var(--space-2);
}

.calc-field__radio-option {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: background var(--transition-fast);
}

.calc-field__radio-option:hover {
  background: var(--color-bg-hover);
}

.calc-field__radio {
  appearance: none;
  width: 20px;
  height: 20px;
  border: 2px solid var(--color-border);
  border-radius: 50%;
  background: var(--color-bg-input);
  cursor: pointer;
  transition: all var(--transition-fast);
  position: relative;
  flex-shrink: 0;
}

.calc-field__radio:checked {
  border-color: var(--color-accent);
}

.calc-field__radio:checked::after {
  content: '';
  position: absolute;
  top: 3px;
  left: 3px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--color-accent);
}

.calc-field__radio-label {
  font-size: var(--text-sm);
  color: var(--color-text-primary);
  cursor: pointer;
}

/* ---- Result Panel ---- */
.calc-result {
  background: var(--color-bg-surface);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  margin-top: var(--space-8);
  position: relative;
  overflow: hidden;
}

.calc-result::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--color-border);
  transition: background var(--transition-base);
}

.calc-result[data-severity="low"]::before {
  background: var(--color-severity-low);
}

.calc-result[data-severity="moderate"]::before {
  background: var(--color-severity-moderate);
}

.calc-result[data-severity="high"]::before {
  background: var(--color-severity-high);
}

.calc-result[data-severity="very-high"]::before {
  background: var(--color-severity-very-high);
}

.calc-result__header {
  display: flex;
  align-items: baseline;
  gap: var(--space-4);
  margin-bottom: var(--space-4);
}

.calc-result__label {
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  color: var(--color-text-tertiary);
}

.calc-result__topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  margin-bottom: var(--space-4);
}

.calc-result__actions {
  display: flex;
  gap: var(--space-2);
}

.calc-result__action {
  font-size: var(--text-xs);
  font-weight: var(--weight-medium);
  color: var(--color-text-secondary);
  background: var(--color-bg);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-md);
  padding: 4px 10px;
  cursor: pointer;
  transition: background var(--transition-base), color var(--transition-base);
}

.calc-result__action:hover {
  background: var(--color-bg-surface);
  color: var(--color-text-primary);
}

.calc-result__score {
  font-family: var(--font-serif);
  font-size: var(--text-4xl);
  font-weight: var(--weight-bold);
  color: var(--color-text-primary);
  line-height: 1;
}

.calc-result__unit {
  font-size: var(--text-lg);
  color: var(--color-text-tertiary);
  font-weight: var(--weight-normal);
}

/* ---- Interpretation List ---- */
.interpretations {
  margin-top: var(--space-6);
}

.interpretations__title {
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  color: var(--color-accent-text);
  margin-bottom: var(--space-4);
}

.interpretation {
  padding: var(--space-4);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-2);
  border: 1px solid transparent;
  transition: all var(--transition-base);
  opacity: 0.45;
}

.interpretation.active {
  opacity: 1;
  transform: scale(1.01);
}

.interpretation--low {
  border-color: var(--color-severity-low-border);
  background: var(--color-severity-low-bg);
}

.interpretation--low.active {
  border-color: var(--color-severity-low);
}

.interpretation--moderate {
  border-color: var(--color-severity-moderate-border);
  background: var(--color-severity-moderate-bg);
}

.interpretation--moderate.active {
  border-color: var(--color-severity-moderate);
}

.interpretation--high {
  border-color: var(--color-severity-high-border);
  background: var(--color-severity-high-bg);
}

.interpretation--high.active {
  border-color: var(--color-severity-high);
}

.interpretation--very-high {
  border-color: var(--color-severity-very-high-border);
  background: var(--color-severity-very-high-bg);
}

.interpretation--very-high.active {
  border-color: var(--color-severity-very-high);
}

.interpretation__header {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-2);
}

.interpretation__range {
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  color: var(--color-text-tertiary);
  font-family: var(--font-mono);
}

.interpretation__label {
  font-size: var(--text-sm);
  font-weight: var(--weight-semibold);
  color: var(--color-text-primary);
}

.interpretation__desc {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  line-height: var(--leading-normal);
  margin-bottom: var(--space-2);
}

.interpretation__recommendation {
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  color: var(--color-text-primary);
  background: rgba(255,255,255,0.5);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-sm);
  border-left: 3px solid currentColor;
}

/* ---- Back Button ---- */
.back-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-text-tertiary);
  text-decoration: none;
  margin-bottom: var(--space-6);
  transition: color var(--transition-fast);
  cursor: pointer;
}

.back-link:hover {
  color: var(--color-text-primary);
}

/* ---- Sticky Result on Mobile ---- */
@media (max-width: 768px) {
  .calc-field {
    flex-direction: column;
    align-items: stretch;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-4);
  }

  .calc-field__input-wrap {
    align-self: flex-end;
  }

  .calc-field__select {
    max-width: 100%;
    width: 100%;
  }

  .calc-field__number {
    width: 100%;
  }

  .calc-result {
    padding: var(--space-4);
  }

  .calc-result__score {
    font-size: var(--text-2xl);
  }
}