.core-area-item {
  padding: 6px 10px;
  margin-bottom: 10px;
  border-radius: var(--bl-border-radius);
  background: #ececec;
  font-size: 16px;
  transition: background-color 0.3s ease;
}
.core-area-item.active {
  font-weight: 500;
  background-color: var(--bl-light-color);
}

.about-us-container {
  position: absolute;
  display: block;
  margin: auto;
  width: 100%;
  padding: 20px;
  bottom: -100px;
  left: 50%;
  right: 50%;
  transform: translate(-50%, 0);
  border-radius: var(--bl-border-radius);
  background-color: var(--bl-light-color);
}

@media (min-width: 768px) {
  .about-us-container {
    width: 550px;
  }
}