Demo CSS file for Modal system tutorial article at Medium

Modal.css

.modal {
  position: fixed;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 100%;
  top: 0;
  left: 0;
  z-index: 1;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s;
}

.modal::before {
  position: absolute;
  content: '';
  background-color: rgba(0, 0, 0, 0.15);
  height: inherit;
  width: inherit;
}

.modal-visible .modal {
  opacity: 1;
  pointer-events: all;
}

.modal-visible .modal-contents {
  transform: scale(1);
}

.modal-contents {
  background-color: #fff;
  color: #000;
  padding: 0.75rem;
  width: 400px;
  z-index: 2;
  text-align: center;
  box-shadow: 0 0 35px 0 rgba(0, 0, 0, 0.2);

  transform: scale(0.8);
  transition: transform 0.2s;
}

.modal-header,
.modal-body {
  padding: 0.75rem;
}

.modal-footer {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem;
}

.modal-btn {
  padding: 0.55rem 1.25rem;
  margin: 0 0.55rem;
  border: none;
  outline: none;
  cursor: pointer;
}

.modal-btn:hover {
  opacity: 0.5;
}

.modal-confirm {
  background-color: teal;
  color: #fff;
}

.modal-cancel {
  background-color: #efefef;
}