.lc-topic-layout {
  gap: 18px;
}

.lc-topic-head {
  background:
    radial-gradient(circle at 8% 0%, rgba(91, 141, 239, 0.2), transparent 30%),
    linear-gradient(135deg, rgba(255, 255, 255, 0.95), rgba(240, 246, 255, 0.9));
}

.lc-deep-dive {
  display: grid;
  gap: 16px;
}

.lc-head,
.lc-band {
  border: 1px solid rgba(190, 202, 222, 0.72);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.9);
  box-shadow: 0 18px 42px rgba(29, 54, 93, 0.08);
}

.lc-head {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 18px;
  align-items: center;
  padding: 24px;
}

.lc-head h2 {
  margin: 6px 0 10px;
  color: #111827;
  font-size: clamp(1.8rem, 3vw, 3rem);
  letter-spacing: 0;
}

.lc-head p,
.lc-band p {
  margin: 0;
  color: #667085;
  line-height: 1.75;
}

.lc-badge {
  display: grid;
  place-items: center;
  min-width: 128px;
  min-height: 128px;
  border-radius: 24px;
  color: #fff;
  background: linear-gradient(135deg, #4c83f0, #6aa9ff);
  box-shadow: 0 18px 36px rgba(76, 131, 240, 0.28);
}

.lc-badge strong {
  font-size: 3.2rem;
  line-height: 1;
}

.lc-badge span {
  font-weight: 800;
}

.lc-nav {
  position: sticky;
  top: 84px;
  z-index: 20;
  display: grid;
  grid-template-columns: repeat(8, minmax(0, 1fr));
  gap: 8px;
  padding: 10px;
  border: 1px solid rgba(190, 202, 222, 0.72);
  border-radius: 16px;
  background: rgba(245, 249, 255, 0.92);
  backdrop-filter: blur(14px);
}

.lc-nav button,
.lc-route button,
.lc-options button {
  min-height: 44px;
  border: 1px solid rgba(190, 202, 222, 0.9);
  border-radius: 12px;
  color: #1f2937;
  font-weight: 900;
  background: linear-gradient(180deg, #fff, #f7faff);
  box-shadow: 0 8px 18px rgba(29, 54, 93, 0.06);
  cursor: pointer;
}

.lc-nav button:hover,
.lc-route button:hover,
.lc-options button:hover {
  border-color: rgba(76, 131, 240, 0.7);
  color: #2f6ee9;
}

.lc-band {
  padding: 20px;
  scroll-margin-top: 150px;
}

.lc-route {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 12px;
  margin-top: 16px;
}

.lc-route button {
  display: grid;
  gap: 8px;
  justify-items: start;
  padding: 16px;
  text-align: left;
}

.lc-route span {
  display: grid;
  place-items: center;
  width: 30px;
  height: 30px;
  border-radius: 999px;
  color: #fff;
  background: #4c83f0;
}

.lc-lab-grid {
  display: grid;
  grid-template-columns: minmax(250px, 0.6fr) minmax(0, 1.4fr);
  gap: 18px;
  align-items: stretch;
  margin-top: 16px;
}

.lc-figure {
  width: 100%;
  min-height: 300px;
  border: 1px solid rgba(212, 222, 237, 0.9);
  border-radius: 16px;
  background:
    linear-gradient(rgba(76, 131, 240, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(76, 131, 240, 0.05) 1px, transparent 1px),
    #fff;
  background-size: 32px 32px;
}

.lc-result {
  margin-top: 14px;
  padding: 14px 16px;
  border: 1px solid rgba(190, 202, 222, 0.8);
  border-radius: 14px;
  color: #334155;
  font-weight: 900;
  line-height: 1.65;
  background: rgba(248, 251, 255, 0.95);
}

.lc-items {
  display: grid;
  grid-template-columns: repeat(6, minmax(62px, 1fr));
  gap: 12px;
  min-height: 178px;
  margin: 16px 0;
}

.lc-items span,
.lc-items button {
  display: grid;
  place-items: center;
  min-height: 72px;
  border: 1px solid rgba(76, 131, 240, 0.22);
  border-radius: 18px;
  color: #245fc9;
  font-size: 1.5rem;
  font-weight: 950;
  background: linear-gradient(180deg, #ffffff, #edf5ff);
  box-shadow: inset 0 0 0 6px rgba(76, 131, 240, 0.06);
}

.lc-items button {
  cursor: pointer;
}

.lc-items button.is-counted {
  color: #0f766e;
  border-color: rgba(20, 184, 166, 0.45);
  background: rgba(20, 184, 166, 0.12);
}

.lc-items button.is-repeat {
  color: #b42318;
  border-color: rgba(239, 68, 68, 0.45);
  background: rgba(239, 68, 68, 0.12);
}

.lc-compare-cards {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-top: 16px;
}

.lc-compare-cards article {
  display: grid;
  gap: 8px;
  padding: 18px;
  border: 1px solid rgba(190, 202, 222, 0.8);
  border-radius: 16px;
  background: linear-gradient(180deg, #fff, #f7faff);
}

.lc-compare-cards strong {
  color: #4c83f0;
  font-size: 2.4rem;
}

.lc-compare-cards span {
  color: #667085;
  font-weight: 850;
}

.lc-example-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 12px;
  margin-top: 16px;
}

.lc-example-grid article,
.lc-mistake-grid article,
.lc-final article {
  border: 1px solid rgba(190, 202, 222, 0.76);
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.95);
}

.lc-example-grid article {
  display: grid;
  gap: 10px;
  min-height: 178px;
  padding: 16px;
}

.lc-example-grid span {
  width: fit-content;
  padding: 5px 10px;
  border-radius: 999px;
  color: #2f6ee9;
  font-size: 0.78rem;
  font-weight: 950;
  background: rgba(76, 131, 240, 0.12);
}

.lc-example-grid h3,
.lc-mistake-grid h3,
.lc-final h3 {
  margin: 0;
  color: #111827;
}

.lc-example-grid p,
.lc-mistake-grid p {
  color: #667085;
}

.lc-case-card {
  align-content: start;
}

.lc-case-controls {
  display: grid;
  gap: 8px;
}

.lc-case-controls label {
  color: #344054;
  font-weight: 850;
}

.lc-case-visual {
  display: grid;
  gap: 6px;
  min-height: 74px;
  padding: 8px;
  border-radius: 12px;
  background: rgba(76, 131, 240, 0.06);
}

.lc-case-visual div {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
}

.lc-case-visual i {
  display: grid;
  place-items: center;
  min-width: 20px;
  height: 20px;
  border-radius: 999px;
  color: #fff;
  font-size: 0.72rem;
  font-style: normal;
  font-weight: 900;
  background: #98a2b3;
}

.lc-case-visual i[class^="lc-sem-"] {
  position: relative;
  background: var(--c);
}

.lc-sem-bowl {
  width: 24px;
  height: 14px;
  border-radius: 4px 4px 14px 14px;
}

.lc-sem-spoon {
  width: 8px;
  height: 26px;
  border-radius: 999px;
}

.lc-sem-spoon::before {
  content: "";
  position: absolute;
  top: -5px;
  left: -5px;
  width: 18px;
  height: 14px;
  border-radius: 999px;
  background: var(--c);
}

.lc-sem-person {
  width: 18px;
  height: 26px;
  border-radius: 999px 999px 7px 7px;
}

.lc-sem-card {
  width: 22px;
  height: 28px;
  border-radius: 5px;
}

.lc-sem-shoe {
  width: 28px;
  height: 14px;
  border-radius: 999px 12px 6px 6px;
}

.lc-sem-slot {
  width: 24px;
  height: 22px;
  border-radius: 6px;
  background: transparent !important;
  border: 3px solid var(--c);
}

.lc-sem-car {
  width: 30px;
  height: 18px;
  border-radius: 8px 8px 4px 4px;
}

.lc-sem-toy {
  width: 22px;
  height: 22px;
  border-radius: 7px;
  transform: rotate(8deg);
}

.lc-sem-fruit {
  width: 22px;
  height: 22px;
  border-radius: 999px 999px 999px 4px;
}

.lc-case-visual b {
  color: #344054;
  font-size: 0.82rem;
}

.lc-case-visual i.is-on {
  background: #4c83f0;
}

.lc-case-visual b {
  display: inline-grid;
  place-items: center;
  min-height: 42px;
  padding: 6px 10px;
  border-radius: 12px;
  background: #fff;
}

.lc-rollcall {
  display: grid !important;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 6px;
}

.lc-rollcall span {
  position: relative;
  display: grid;
  justify-items: center;
  gap: 2px;
  padding: 5px;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.72);
}

.lc-rollcall span.is-counted {
  background: rgba(76, 131, 240, 0.13);
  box-shadow: inset 0 0 0 2px rgba(76, 131, 240, 0.16);
}

.lc-rollcall small {
  color: #667085;
  font-size: 0.68rem;
  font-weight: 900;
}

.lc-block-groups,
.lc-bag-scene {
  display: grid !important;
  gap: 8px;
}

.lc-block-groups section,
.lc-bag-scene section {
  display: grid;
  gap: 5px;
  padding: 8px;
  border: 1px solid rgba(120, 139, 168, 0.16);
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.72);
}

.lc-block-groups strong,
.lc-bag-scene strong {
  color: #435268;
  font-size: 0.76rem;
  font-weight: 950;
}

.lc-bag-scene section {
  position: relative;
  border-radius: 8px 8px 14px 14px;
  background: linear-gradient(180deg, #fff 0 70%, rgba(76, 131, 240, 0.1) 70%);
}

.lc-bag-scene section.is-rest {
  background: rgba(245, 166, 35, 0.13);
}

.lc-case-result {
  padding: 10px;
  border-radius: 12px;
  color: #334155;
  font-weight: 900;
  background: rgba(22, 163, 148, 0.09);
}

.lc-mistake-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
  margin-top: 16px;
}

.lc-mistake-grid article {
  padding: 16px;
}

.lc-mistake-grid strong {
  color: #2f6ee9;
}

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

.lc-final article {
  padding: 16px;
}

.lc-options {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
  margin-top: 12px;
}

.lc-options button.is-selected {
  color: #fff;
  border-color: #4c83f0;
  background: #4c83f0;
}

.lc-options button.is-correct {
  color: #0f766e;
  border-color: rgba(20, 184, 166, 0.5);
  background: rgba(20, 184, 166, 0.12);
}

.lc-options button.is-wrong {
  color: #b42318;
  border-color: rgba(239, 68, 68, 0.42);
  background: rgba(239, 68, 68, 0.1);
}

.lc-error-list {
  display: grid;
  gap: 6px;
  margin-top: 8px;
  color: #b42318;
}

#lc-game-prompt {
  margin-top: 16px;
}

@media (max-width: 1180px) {
  .lc-nav {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

  .lc-mistake-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 760px) {
  .lc-head,
  .lc-lab-grid,
  .lc-final {
    grid-template-columns: 1fr;
  }

  .lc-nav,
  .lc-route,
  .lc-example-grid,
  .lc-mistake-grid,
  .lc-compare-cards,
  .lc-options {
    grid-template-columns: 1fr;
  }

  .lc-badge {
    width: 100%;
  }

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