.semester-history {
  position: relative;
  flex-shrink: 0;
  font-family: -apple-system, sans-serif;
}

.semester-badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  border: 1px solid #A8D5B5;
  border-radius: 20px;
  padding: 4px 8px;
  background: #E8F5EE;
  color: #1A6E3A;
  font-size: 9px;
  font-weight: 700;
  letter-spacing: .05em;
  line-height: 1;
  text-transform: uppercase;
  cursor: pointer;
  transition: border-color .15s ease, box-shadow .15s ease, transform .15s ease;
}

.semester-badge:hover,
.semester-badge:focus-visible,
.semester-history.is-open .semester-badge {
  border-color: currentColor;
  box-shadow: 0 2px 8px rgba(22, 32, 43, .12);
  outline: none;
  transform: translateY(-1px);
}

.semester-badge-upcoming { background: #FFF7DF; border-color: #E6C86A; color: #735711; }
.semester-badge-previous { background: #F0F2F4; border-color: #CDD2D8; color: #59636F; }

/* In course banners, use the course palette so the badge complements its banner. */
.course-banner-side .semester-badge,
.course-banner-side .semester-badge-upcoming,
.course-banner-side .semester-badge-previous {
  background: var(--course-accent-soft);
  border-color: var(--semester-badge-ink, var(--course-accent));
  color: var(--semester-badge-ink, var(--course-accent));
}

.course-banner-side .semester-badge:hover,
.course-banner-side .semester-badge:focus-visible,
.course-banner-side .semester-history.is-open .semester-badge {
  border-color: var(--semester-badge-ink, var(--course-accent));
  box-shadow: 0 2px 10px rgba(0, 0, 0, .2);
}
.semester-badge-code { letter-spacing: .07em; }
.semester-badge-status { font-weight: 600; }
.semester-badge-status::before { content: "\00b7"; margin-right: 5px; }
.history-icon { flex: none; margin-left: 1px; }

.semester-popover {
  position: absolute;
  z-index: 30;
  top: calc(100% + 8px);
  right: 0;
  width: 230px;
  padding: 12px;
  border: 1px solid #D8DDE3;
  border-radius: 10px;
  background: white;
  box-shadow: 0 12px 30px rgba(22, 32, 43, .16);
  color: #2F3740;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-4px);
  pointer-events: none;
  transition: opacity .14s ease, transform .14s ease, visibility .14s;
}

.semester-popover::before {
  content: "";
  position: absolute;
  right: 18px;
  top: -5px;
  width: 8px;
  height: 8px;
  border-left: 1px solid #D8DDE3;
  border-top: 1px solid #D8DDE3;
  background: white;
  transform: rotate(45deg);
}

.semester-history:hover .semester-popover,
.semester-history:focus-within .semester-popover,
.semester-history.is-open .semester-popover {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
  pointer-events: auto;
}

.semester-popover-title {
  display: block;
  margin-bottom: 8px;
  color: #68727E;
  font-size: 9px;
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
}

.semester-popover ul { display: grid; gap: 7px; margin: 0; padding: 0; list-style: none; }
.semester-popover li { display: grid; grid-template-columns: 42px 1fr auto; align-items: center; gap: 7px; }
.history-term { font-size: 10px; font-weight: 800; letter-spacing: .05em; }
.history-status { font-size: 10px; font-weight: 650; }
.history-status-current { color: #1A6E3A; }
.history-status-upcoming { color: #8A6710; }
.history-status-previous { color: #7A8491; }
.history-first {
  border-radius: 10px;
  padding: 2px 5px;
  background: #F3E8ED;
  color: #9E1745;
  font-size: 8px;
  font-weight: 700;
  white-space: nowrap;
}

@media (max-width: 440px) {
  .semester-badge-status { display: none; }
  .semester-popover { width: 210px; }
}