.section-transition{
  position:relative;

  width:100%;
  height:90px;

  background:#020617;

  overflow:visible;

  z-index:2;
}

.section-transition::before{
  content:"";

  position:absolute;
  top: -10px;
  bottom:0;
  left:50%;

  transform:translateX(-50%);

  width:120px;
  height:60px;

  background: #F8FAFC; 

  clip-path:polygon(
    0 0,
    100% 0,
    50% 100%
  );
}