/* Single Usecase (ユースケース) — not Case Study */
#usecase-single {
  background-color: #fff;
}

#usecase-single .usecase-article {
  margin-bottom: 30px;
}

#usecase-single .usecase-date {
  font-size: 0.85rem;
  color: #6c757d;
}

#usecase-single .usecase-title {
  font-size: 1.8rem;
  font-weight: 700;
  color: #212529;
  line-height: 1.4;
}

#usecase-single .usecase-article hr {
  border-top: 1px solid #dee2e6;
  margin-top: 0;
  opacity: 1;
}

#usecase-single .usecase-thumbnail img {
  width: 100%;
  border-radius: 8px;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
}

#usecase-single .usecase-content {
  line-height: 1.7;
  font-size: 1rem;
  color: #333;
}

#usecase-single .usecase-content p {
  margin-bottom: 1rem;
}

#usecase-single .usecase-content h2 {
  font-size: 1.5rem;
  margin: 1.5rem 0 1rem;
  font-weight: 600;
}

#usecase-single .usecase-content h3 {
  font-size: 1.25rem;
  margin: 1.25rem 0 0.75rem;
  font-weight: 600;
}

#usecase-single .usecase-content ul,
#usecase-single .usecase-content ol {
  margin-bottom: 1rem;
  padding-left: 1.5rem;
}

#usecase-single .usecase-content img {
  max-width: 100%;
  height: auto;
  border-radius: 6px;
  margin: 1rem 0;
}

#usecase-single .sidebar-usecase-list {
  position: sticky;
  top: 20px;
  margin-bottom: 30px;
}

#usecase-single .sidebar-usecase-list h5 {
  font-size: 1.1rem;
  font-weight: 600;
  color: #212529;
  border-color: #dee2e6 !important;
}

#usecase-single .sidebar-usecase-items li {
  border-color: #eee !important;
}

#usecase-single .sidebar-usecase-thumb {
  width: 60px;
  height: 60px;
  overflow: hidden;
  border-radius: 4px;
}

#usecase-single .sidebar-usecase-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

#usecase-single .sidebar-usecase-items h6 {
  font-size: 0.9rem;
  line-height: 1.35;
  font-weight: 600;
  overflow: hidden;
  text-overflow: ellipsis;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
}

#usecase-single .sidebar-usecase-items small {
  font-size: 0.75rem;
}

@media (max-width: 991.98px) {
  #usecase-single .usecase-title {
    font-size: 1.5rem;
  }

  #usecase-single .sidebar-usecase-list {
    position: static;
    margin-top: 2rem;
  }
}