.collaboration-card {
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 40px), calc(100% - 40px) 100%, 0 100%);
}

.collaboration-card::before {
  content: "";
  position: absolute;
  inset: 0;
  border: 6px solid transparent;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 40px), calc(100% - 40px) 100%, 0 100%);
}

.collaboration-card:hover::before {
  border-color: #00B4B4;
}

.collaboration-card::after {
  clip-path: polygon(100% 0, 0 100%, 100% 100%);
}