.oo-experiment-shell {
  display: grid;
  gap: 18px;
}

.oo-exp-grid {
  display: grid;
  grid-template-columns: minmax(250px, 0.34fr) minmax(0, 1fr);
  gap: 18px;
}

.oo-exp-controls,
.oo-exp-board,
.oo-tree-visual {
  display: grid;
  gap: 12px;
  padding: 16px;
  border: 1px solid rgba(190, 202, 222, 0.78);
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.92);
}

.oo-expression {
  padding: 14px;
  border-radius: 14px;
  color: #111827;
  font-size: 1.8rem;
  font-weight: 950;
  text-align: center;
  background: linear-gradient(180deg, #fff7ed, #fff);
}

.oo-exp-objects,
.oo-tree {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  align-items: center;
}

.oo-token,
.oo-tree span {
  display: grid;
  place-items: center;
  min-height: 92px;
  padding: 12px;
  border: 2px solid rgba(190, 202, 222, 0.8);
  border-radius: 16px;
  color: #334155;
  font-size: 1.25rem;
  font-weight: 950;
  background: #f8fbff;
}

.oo-token.group,
.oo-tree span:nth-child(3) {
  background: #ecfeff;
}

.oo-token.answer,
.oo-tree span:first-child {
  background: #f0fdf4;
}

.oo-token.is-on,
.oo-tree .is-on {
  border-color: #f59e0b;
  box-shadow: 0 0 0 4px rgba(245, 158, 11, 0.16);
}

.oo-token small {
  display: block;
  color: #0f766e;
  font-size: 0.82rem;
}

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

.oo-case {
  display: grid;
  gap: 12px;
  padding: 14px;
  border: 1px solid rgba(190, 202, 222, 0.78);
  border-radius: 16px;
  background: #fff;
}

.oo-case-head {
  display: grid;
  gap: 6px;
}

.oo-case-head span {
  color: #2563eb;
  font-size: 0.82rem;
  font-weight: 950;
}

.oo-case-head strong {
  color: #111827;
  font-size: 1.05rem;
}

.oo-case-head em {
  width: fit-content;
  padding: 5px 9px;
  border-radius: 999px;
  color: #92400e;
  background: #fef3c7;
  font-style: normal;
  font-weight: 950;
}

.oo-case-visual {
  min-height: 180px;
  padding: 12px;
  border-radius: 14px;
  background: linear-gradient(180deg, #f8fbff, #fff);
}

.oo-case-visual > div {
  min-height: 156px;
}

.oo-case-metrics {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.oo-case-metrics span {
  display: grid;
  gap: 4px;
  padding: 10px;
  border: 1px solid rgba(99, 102, 241, 0.18);
  border-radius: 12px;
  color: #64748b;
  background: #f8fafc;
  font-size: 0.82rem;
}

.oo-case-metrics b {
  color: #0f172a;
}

.oo-shop,
.oo-recipe,
.oo-fund,
.oo-score,
.oo-budget {
  display: grid;
  gap: 10px;
}

.oo-shop section,
.oo-recipe section,
.oo-fund section,
.oo-score section,
.oo-budget section {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  align-items: center;
}

.oo-shop strong,
.oo-receipt strong,
.oo-recipe strong,
.oo-route strong,
.oo-fund strong,
.oo-build strong,
.oo-score strong,
.oo-data strong,
.oo-time strong,
.oo-budget strong,
.oo-story strong,
.oo-formula strong {
  display: block;
  width: fit-content;
  padding: 8px 10px;
  border-radius: 12px;
  color: #0f172a;
  background: #e0f2fe;
}

.oo-pen,
.oo-eraser,
.oo-flour,
.oo-sugar,
.oo-student,
.oo-hit,
.oo-bag {
  display: inline-block;
  width: 18px;
  height: 26px;
  border-radius: 5px;
  background: #4c83f0;
}

.oo-eraser {
  width: 34px;
  height: 18px;
  background: #fb7185;
}

.oo-flour {
  border-radius: 50% 50% 45% 45%;
  background: #f5e6c8;
}

.oo-sugar {
  width: 16px;
  height: 16px;
  border-radius: 4px;
  background: #bae6fd;
}

.oo-student {
  width: 16px;
  height: 24px;
  border-radius: 999px 999px 5px 5px;
  background: #22c55e;
}

.oo-hit {
  width: 20px;
  height: 20px;
  border: 4px solid #ef4444;
  border-radius: 999px;
  background: #fff;
}

.oo-bag {
  width: 22px;
  height: 24px;
  border-radius: 6px 6px 10px 10px;
  background: #f59e0b;
}

.oo-receipt,
.oo-story,
.oo-formula {
  display: grid;
  gap: 8px;
  padding: 12px;
  border: 1px dashed rgba(71, 85, 105, 0.32);
  border-radius: 12px;
  background: #fffdf7;
}

.oo-receipt b,
.oo-story b,
.oo-formula b {
  color: #475569;
}

.oo-receipt span,
.oo-story span,
.oo-formula span {
  color: #b45309;
  font-weight: 900;
}

.oo-route {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
}

.oo-route span {
  min-width: 56px;
  padding: 10px;
  border-radius: 12px;
  color: #fff;
  font-weight: 950;
  text-align: center;
}

.oo-route .walk {
  background: #16a34a;
}

.oo-route .ride {
  background: #2563eb;
}

.oo-build {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 8px;
}

.oo-build section {
  min-height: 62px;
  padding: 8px;
  border-radius: 10px;
  color: #475569;
  font-weight: 900;
  background: #eef2ff;
}

.oo-data section {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 6px;
}

.oo-data span,
.oo-time span {
  display: grid;
  place-items: center;
  min-height: 34px;
  border-radius: 10px;
  color: #075985;
  font-weight: 900;
  background: #e0f2fe;
}

.oo-time {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
}

.oo-time i {
  padding: 8px 10px;
  border-radius: 999px;
  color: #92400e;
  font-style: normal;
  font-weight: 900;
  background: #fef3c7;
}

.oo-steps {
  grid-template-columns: repeat(5, minmax(0, 1fr));
}