/* Shared selector used by plan controls and Results choices.
   Markup is a <fieldset class="segmented"> with a visually hidden legend,
   followed by alternating radio inputs and their labels. The adjacent-sibling
   selector deliberately out-specifies the shared field-label presentation. */
.segmented {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 4px;
  margin: var(--space-3) 0 0;
  padding: 4px;
  background: var(--color-surface);
  border: var(--border-thin);
  border-radius: var(--radius-md);
}

.segmented.segmented-3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.segmented input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.segmented input + label {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 36px;
  margin: 0;
  padding: 7px 8px;
  border-radius: var(--radius-xs);
  color: var(--color-text-muted);
  font-family: var(--font-ui);
  font-size: var(--font-size-supporting);
  font-weight: 700;
  line-height: 1.25;
  text-align: center;
  cursor: pointer;
  transition: background var(--transition-fast), color var(--transition-fast), box-shadow var(--transition-fast);
}

.segmented input:checked + label {
  background: var(--color-action);
  color: #fff;
  box-shadow: var(--shadow-subtle);
}

/* The radio is transparent and absolutely positioned, so draw its keyboard
   focus ring on the visible label. */
.segmented input:focus-visible + label {
  outline: 2px solid var(--color-focus);
  outline-offset: 2px;
}

.segmented input:not(:checked) + label:hover {
  background: var(--color-action-subtle);
}

.segmented input:disabled + label {
  opacity: 0.5;
  cursor: not-allowed;
}

/* The Results basis selector belongs to the heading shared by all four Results
   pages. A fixed split prevents label weight and caption changes from moving
   either option. The always-present mount must disappear while empty. */
[data-basis-toggle] {
  width: min(360px, 100%);
  margin-left: auto;
}

[data-basis-toggle]:empty {
  display: none;
}

.segmented.results-basis {
  flex-shrink: 0;
  width: 280px;
  max-width: 100%;
  margin: 0 0 0 auto;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.basis-caption {
  margin: var(--space-2) 0 0;
  font-size: var(--font-size-supporting);
  line-height: var(--line-height-supporting);
  text-align: right;
  color: var(--color-text-muted);
}

.page-heading:has(.results-basis) {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

@media (max-width: 767px) {
  .page-heading:has(.results-basis) > [data-basis-toggle] {
    width: 100%;
    margin-left: 0;
  }

  .segmented.results-basis {
    margin-right: auto;
    margin-left: auto;
  }

  .basis-caption {
    text-align: center;
  }
}