.subject-hero {
  background-size: cover;
  background-position: center;
  min-height: 350px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.subject-hub-card {
  border: none;
  border-radius: 0.75rem;
  transition:
    transform 0.3s ease,
    box-shadow 0.3s ease;
  text-align: center;
}

.subject-hub-card:hover {
  transform: translateY(-10px);
  box-shadow: 0 1rem 3rem rgba(0, 0, 0, 0.175) !important;
}

.subject-hub-card .card-body {
  padding: 2rem;
  display: flex;
  flex-direction: column;
}

.subject-hub-card .icon-container {
  font-size: 3rem;
  color: var(--kdb-navy-color, #01083a);
  margin-bottom: 1.5rem;
}

.subject-hub-card .card-title {
  color: var(--kdb-navy-color, #01083a);
  font-weight: 700;
  margin-bottom: 1rem;
}

.subject-hub-card .card-text {
  flex-grow: 1;
  color: #6c757d;
  margin-bottom: 1.5rem;
}

.subject-hub-card .btn {
  background-color: var(--kdb-navy-color, #01083a);
  border-color: var(--kdb-navy-color, #01083a);
  color: #fff;
  font-weight: 700;
  padding: 0.6rem 1.5rem;
  border-radius: 50px;
  transition:
    background-color 0.3s ease,
    border-color 0.3s ease;
}

.subject-hub-card .btn:hover {
  background-color: var(--kdb-orange-color, #ff4e03);
  border-color: var(--kdb-orange-color, #ff4e03);
}

.activity-link-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 1.5rem 1rem;
  border: 1px solid #e9ecef;
  border-radius: 0.5rem;
  text-decoration: none;
  color: var(--kdb-navy-color, #01083a);
  transition:
    transform 0.2s,
    box-shadow 0.2s,
    background-color 0.2s;
  height: 100%;
}

.activity-link-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.1);
  background-color: #f8f9fa;
}

.activity-link-card .icon {
  font-size: 2.5rem;
  margin-bottom: 1rem;
}

.activity-link-card .title {
  font-weight: 600;
  font-size: 1rem;
}

.subject-sidebar-nav {
  overflow: hidden;
}

.subject-sidebar-ad {
  margin-top: 1rem;
}

.subject-promo-band {
  background: linear-gradient(135deg, #eef5ff 0%, #f8fbff 100%);
  border: 1px solid #d8e5ff;
  border-radius: 0.75rem;
  padding: 1.25rem 1.25rem 1.35rem;
}

.subject-promo-band__eyebrow {
  display: inline-block;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: #2f66c5;
  font-weight: 700;
  margin-bottom: 0.45rem;
}

.subject-promo-band__title {
  font-size: 1.25rem;
  line-height: 1.35;
  margin-bottom: 0.55rem;
  color: #012050;
}

.subject-promo-band__text {
  margin-bottom: 0.9rem;
  color: #355070;
}

.subject-promo-band__cta {
  display: inline-block;
  text-decoration: none;
  background-color: #012a66;
  color: #ffffff;
  padding: 0.5rem 1rem;
  border-radius: 999px;
  font-weight: 600;
}

.subject-promo-band__cta:hover {
  background-color: #ff4e03;
  color: #ffffff;
}

.subject-articles {
  margin-top: 4rem;
}

@media (max-width: 991.98px) {
  .subject-hero {
    min-height: 280px;
  }

  .subject-articles {
    margin-top: 2rem;
  }
}