.seminar-tabs {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: stretch;
  gap: 6px;
  padding: 6px;
  margin: 32px auto;
  max-width: 1160px;
  background: #f1f8ff;
  border: 1px solid #eee;
  border-radius: 14px;
}
.seminar-tabs::before {
  content: "";
  position: absolute;
  top: 6px;
  bottom: 6px;
  left: 6px;
  width: calc((100% - 18px) / 2);
  background-color: #013364;
  border-radius: 10px;
  box-shadow: inset 0 4px 12px rgba(0, 0, 0, 0.5333333333);
  transform: translateX(0);
  transition: transform 0.35s cubic-bezier(0.22, 1, 0.36, 1);
  pointer-events: none;
}
.seminar-tabs:has(.seminar-tab:nth-child(2).is-active)::before {
  transform: translateX(calc(100% + 6px));
}
.seminar-tabs .seminar-tab {
  position: relative;
  z-index: 1;
  flex: 1;
  min-width: 0;
  padding: 18px 20px;
  border: none;
  border-radius: 10px;
  background-color: transparent;
  color: #43546a;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.5;
  text-align: center;
  cursor: pointer;
  transition: color 0.25s ease, background-color 0.25s ease;
}
.seminar-tabs .seminar-tab:hover:not(.is-active) {
  color: #0068b7;
  background-color: rgba(255, 255, 255, 0.6);
}
.seminar-tabs .seminar-tab.is-active {
  color: #fff;
  background-color: transparent;
  transition: none;
}
.seminar-tabs .seminar-tab:focus-visible {
  outline: 3px solid #78baff;
  outline-offset: 3px;
}

@media (max-width: 767px) {
  .seminar-tabs {
    gap: 4px;
    padding: 4px;
    margin-bottom: 24px;
    border-radius: 12px;
  }
  .seminar-tabs::before {
    top: 4px;
    bottom: 4px;
    left: 4px;
    width: calc((100% - 12px) / 2);
    border-radius: 8px;
  }
  .seminar-tabs:has(.seminar-tab:nth-child(2).is-active)::before {
    transform: translateX(calc(100% + 4px));
  }
  .seminar-tabs .seminar-tab {
    padding: 14px 8px;
    font-size: 13px;
    line-height: 1.5;
  }
}
@media (prefers-reduced-motion: reduce) {
  .seminar-tabs::before,
  .seminar-tabs .seminar-tab {
    transition: none;
  }
  .seminar-tab-content:not([hidden]) {
    animation: none;
  }
}