/* ── Course banner ── */
.course-banner {
  background: var(--teal);
  border-bottom: 1px solid rgba(0,0,0,0.15);
  padding: 18px 40px;
}
.course-banner-inner {
  max-width: var(--content-max-width); margin: 0 auto;
  display: flex; align-items: flex-start;
  justify-content: space-between; gap: 32px;
}
.course-banner-left { flex: 1; }
.course-banner-side {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 10px;
  flex-shrink: 0;
}
.course-desc-label {
  font-family: -apple-system, sans-serif; font-size: 9px; font-weight: 700;
  letter-spacing: .12em; text-transform: uppercase; color: rgba(255,255,255,0.5);
  margin-bottom: 6px;
}
.course-desc-label a {
  color: rgba(255,255,255,0.75); text-decoration: none;
  border-bottom: 0.5px solid rgba(255,255,255,0.45);
  transition: color .15s;
}
.course-desc-label a:hover { color: white; }
.course-desc-text {
  font-family: -apple-system, sans-serif; font-size: 13px;
  color: rgba(255,255,255,0.88); line-height: 1.65; max-width: 620px;
}
.course-meta-pills { display: flex; flex-wrap: wrap; gap: 7px; flex-shrink: 0; align-self: center; }
.course-banner-side .course-meta-pills { align-self: flex-end; justify-content: flex-end; }
.course-pill {
  display: inline-flex; align-items: center; gap: 5px;
  background: rgba(255,255,255,0.18); border: 0.5px solid rgba(255,255,255,0.4);
  border-radius: 20px; padding: 4px 11px;
  font-family: -apple-system, sans-serif; font-size: 10px; font-weight: 600;
  color: rgba(255,255,255,0.95); white-space: nowrap;
}

@media (max-width: 720px) {
  .course-banner-inner { flex-direction: column; gap: 14px; }
  .course-banner-side { width: 100%; align-items: flex-start; }
  .course-banner-side .course-meta-pills { align-self: flex-start; justify-content: flex-start; }
  .course-banner-side .semester-popover { right: auto; left: 0; }
  .course-banner-side .semester-popover::before { right: auto; left: 18px; }
}