.research-groups {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: clamp(10px, 5cqw, 40px);
}

.research-group {
  --article-title-color: var(--color-primary);
  --article-background-color: var(--color-white);
  background-color: var(--article-background-color);
  border: 1px solid var(--article-title-color);
  display: flex;
  flex-direction: column;
}
.research-group::after {
  content: "";
  position: absolute;
  width: 0.5em;
  height: 0.5em;
  background-color: var(--article-title-color);
  border-radius: 50%;
  right: calc(0% - 0.25em - 1px);
  bottom: 3em;
  transition: var(--transition);
}
.research-group__thumbnail-wrapper {
  aspect-ratio: 4/3;
  overflow: hidden;
}
.research-group__thumbnail-person {
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  object-position: center 20%;
}
.research-group__thumbnail-organization {
  padding: 10px;
}
.research-group__thumbnail-organization[src$=".svg"] {
  width: 100%;
  height: 100%;
}
.research-group__thumbnail-link {
  display: flex;
  justify-content: center;
  align-items: center;
  width: 100%;
  height: 100%;
}
.research-group__content {
  padding: clamp(10px, 5cqw, 30px);
  color: var(--color-primary);
  display: flex;
  flex-direction: column;
  justify-items: space-between;
  flex-grow: 1;
}
.research-group__content-top {
  flex-grow: 1;
}
.research-group__title-link {
  font-size: var(--font-size-20);
  font-family: var(--font-heading);
  font-weight: var(--font-weight-bold);
  font-optical-sizing: auto;
  letter-spacing: var(--letter-spacing);
  color: var(--article-title-color);
  transition: var(--transition);
  line-height: 1.1;
  display: inline-block;
}
.research-group__title-link:hover {
  --article-title-color: var(--color-secondary);
}
.research-group__description {
  margin: 0;
  font-size: var(--font-size-16);
  line-height: var(--line-height);
}
.research-group__description p {
  margin: 0.25em 0;
}
.research-group__meta {
  display: flex;
  gap: 1em;
  align-items: center;
  margin-top: 1em;
  padding-top: 1.5em;
  border-top: 1px solid var(--article-title-color);
}
.research-group__meta-item {
  display: flex;
  align-items: center;
  gap: 0.5em;
  font-size: var(--font-size-16);
  color: var(--color-primary);
  font-weight: var(--font-weight-semibold);
}
.research-group__meta-item:hover {
  color: var(--color-secondary);
}
.research-group__meta-item:hover span {
  opacity: 1;
  pointer-events: auto;
  margin-bottom: 0;
}
.research-group__meta-item::before {
  content: "";
  width: 1em;
  height: 1em;
  mask: var(--icon-meta);
  background-color: var(--color-secondary);
}
.research-group__meta-item--web {
  --icon-meta: var(--icon-web);
}
.research-group__meta-item--email {
  --icon-meta: var(--icon-email);
}
.research-group__meta-item--phone {
  --icon-meta: var(--icon-phone);
}
.research-group__meta-item--linkedin {
  --icon-meta: var(--icon-linkedin);
}
.research-group__meta-item span {
  position: absolute;
  bottom: 100%;
  left: 50%;
  transform: translateX(-50%);
  min-width: max-content;
  z-index: 2;
  background-color: var(--color-primary);
  color: var(--color-white);
  padding: 0.25em 0.5em;
  font-size: var(--font-size-14);
  opacity: 0;
  pointer-events: none;
  transition: var(--transition);
  margin-bottom: -0.5em;
}
.research-group__meta-item span::after {
  content: "";
  position: absolute;
  bottom: -0.25em;
  left: 50%;
  transform: translateX(-50%);
  width: 1.5em;
  height: 0.5em;
  background-color: var(--color-primary);
  clip-path: polygon(0% 0%, 100% 0%, 50% 100%);
}