.site-group-section {
  padding: 96px 24px;
  background: var(--color-surface-container-low);
}

.site-group-heading {
  margin-bottom: 40px;
}

.site-group-note {
  margin-top: 14px;
  color: var(--color-on-surface-variant);
  font-size: 14px;
}

.site-group-toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 24px;
  font-size: 13px;
}

.site-group-count {
  color: var(--color-on-surface-variant);
}

.site-group-expand {
  min-height: 44px;
  padding: 9px 16px;
  border: 1px solid #d9e4f1;
  border-radius: 999px;
  background: #fff;
  color: var(--color-primary);
  cursor: pointer;
  font-weight: 600;
}

.site-group-expand:hover {
  background: #eef6ff;
}

.site-assignment-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  align-items: start;
  gap: 24px;
}

.site-assignment-card {
  min-width: 0;
  overflow: hidden;
  border: 1px solid #e5e5ea;
  border-radius: 18px;
  background: #fff;
  scroll-margin-top: 120px;
}

.site-assignment-card[open] {
  border-color: #aecff1;
}

.site-assignment-summary {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 28px 24px 24px;
  text-align: center;
  list-style: none;
  cursor: pointer;
}

.site-assignment-summary::-webkit-details-marker {
  display: none;
}

.site-assignment-unit {
  margin-bottom: 20px;
  padding: 5px 12px;
  border-radius: 999px;
  background: #eef6ff;
  color: var(--color-primary);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .06em;
}

.site-assignment-summary h3 {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 56px;
  margin-bottom: 12px;
  font-size: 20px;
  font-weight: 650;
  line-height: 1.4;
  letter-spacing: -.025em;
}

.site-assignment-overview {
  min-height: 69px;
  margin-bottom: 18px;
  color: var(--color-on-surface-variant);
  font-size: 14px;
  line-height: 1.65;
}

.site-assignment-disclosure {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  color: var(--color-primary);
  font-size: 13px;
  font-weight: 600;
}

.site-assignment-hide,
.site-assignment-card[open] .site-assignment-show {
  display: none;
}

.site-assignment-card[open] .site-assignment-hide {
  display: inline;
}

.site-assignment-card[open] .site-assignment-arrow {
  transform: rotate(180deg);
}

.site-assignment-content {
  margin: 0 24px;
  padding: 24px 0;
  border-top: 1px solid #ececf0;
  font-size: 14px;
  line-height: 1.7;
}

.site-assignment-tasks {
  list-style: disc;
  padding-left: 18px;
  text-align: left;
}

.site-assignment-tasks li + li {
  margin-top: 12px;
}

.site-assignment-tasks li::marker {
  color: var(--color-primary);
}

.site-assignment-resources {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 20px;
}

.site-assignment-resources a,
.site-assignment-documentation,
.site-group-course-resources a {
  color: var(--color-primary);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.site-assignment-pending {
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid #ececf0;
  color: var(--color-on-surface-variant);
  font-size: 12px;
  text-align: center;
}

.site-group-course-resources {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px 24px;
  margin-top: 40px;
  padding-top: 28px;
  border-top: 1px solid #e0e0e6;
  text-align: center;
  font-size: 13px;
}

.site-group-course-resources p {
  width: 100%;
  color: var(--color-on-surface-variant);
}

.site-group-section a:focus-visible,
.site-group-expand:focus-visible,
.site-assignment-summary:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: -3px;
  border-radius: 6px;
}

@media (max-width: 1099px) {
  .site-assignment-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 679px) {
  .site-group-section {
    padding: 64px 24px;
  }

  .site-assignment-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .site-assignment-summary h3,
  .site-assignment-overview {
    min-height: 0;
  }

  .site-group-toolbar {
    justify-content: center;
  }
}

/* Published documentation is a direct link; requirements stay expandable. */
.site-assignment-summary--linked {
  color: inherit;
  text-decoration: none;
}
.site-assignment-summary--linked:hover { background: #f8fbff; }
.site-assignment-summary--linked:hover h3 { color: var(--color-primary); }
.site-assignment-card--documented { border-color: #b9d6f4; }
.site-assignment-requirements > summary {
  border-top: 1px solid #e5eaf1;
  padding: 12px 24px;
  cursor: pointer;
  text-align: center;
  color: var(--color-on-surface-variant);
  font-size: 12px;
  font-weight: 600;
}
.site-assignment-requirements > summary:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: -3px;
}