.c-mec {
  position: fixed;
  z-index: 1990;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  overflow-y: auto;
  perspective: 800px;
  transition: opacity 0.3s ease-in-out;
}
.c-mec .is-firstItem,
.c-mec .is-lastItem {
  display: block;
  opacity: 0;
  height: 0;
}
.c-mec.is-opened .c-mec__content {
  transform: scale(1);
  transition-duration: 0s;
}
.c-mec__content {
  position: relative;
  background-color: #fff;
  overflow-y: auto;
  width: 100%;
  height: 100%;
  max-width: 100%;
  min-height: 300px;
  transform: scale(0.8);
  transition: transform 0.3s ease-in-out;
  transform-origin: center;
}