.chip {
  display: inline-flex;
  align-items: center;
  position: relative;
}
.chip input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}
.chip span {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--surface);
  color: var(--fg);
  cursor: pointer;
  user-select: none;
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
}
.chip:hover span {
  border-color: var(--accent);
  transform: translateY(-1px);
}
.chip input:checked + span {
  background: var(--primary-bg);
  color: var(--primary-fg);
  border-color: var(--primary-bg);
}
.chip input:focus-visible + span {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}
.ie-fields {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 12px;
}
.ie-notice {
  margin-top: 12px;
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--surface);
}
.ie-notice--error {
  border-color: #d93025;
  color: #d93025;
  background: rgba(217, 48, 37, 0.06);
}
.ie-notice--warn {
  border-color: #b26a00;
  color: #8a4b00;
  background: rgba(246, 185, 0, 0.12);
}
:root.dark .ie-notice--warn {
  color: #ffcc80;
}
.ie-result-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 12px;
}

.ie-results {
  border-color: var(--accent);
}
.ie-result-item {
  padding: 12px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--surface);
}
.ie-result-item .result {
  font-size: 1.5rem;
}

.ie-venn-panel {
  margin-top: 12px;
  padding: 12px;
  border: 1px dashed var(--border);
  border-radius: 12px;
  background: var(--surface);
}
.ie-venn {
  display: flex;
  justify-content: center;
  align-items: center;
  margin-top: 10px;
}
.ie-venn svg {
  width: min(520px, 100%);
  height: auto;
}
.ie-venn-region {
  fill: var(--accent);
  opacity: 0.12;
  cursor: pointer;
  transition: opacity 0.15s ease;
}
.ie-venn-region:hover {
  opacity: 0.18;
}
.ie-venn-region.is-active {
  opacity: 0.28;
}
.ie-venn-outline {
  fill: none;
  stroke: var(--border);
  stroke-width: 2;
}
.ie-venn-label {
  font-size: 12px;
  fill: var(--muted);
  text-anchor: middle;
}
.ie-venn-value {
  font-size: 14px;
  font-weight: 700;
  fill: var(--fg);
  text-anchor: middle;
  dominant-baseline: middle;
}

details.ie-group {
  margin-top: 10px;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--surface);
}
details.ie-group summary {
  cursor: pointer;
  font-weight: 700;
}
details.ie-group[open] summary {
  margin-bottom: 10px;
}

.ie-label-hint {
  display: block;
  margin-top: 2px;
  font-weight: 400;
  font-size: 0.85rem;
  color: var(--muted);
}