.sticker {
  transform: rotate(45deg);
  transform-origin: center;
  right: 0;
  top: 0;
  position: absolute;
  text-align: center;
  width: 160px;
  height: 160px;
  color: #FFF;
  font-size: 15px;
  padding: 0 40px;
  line-height: 1;
}

.sticker-label {
  display: block;
  position: relative;
  padding-bottom: 3px;
}

.sticker-label:before {
  content: '';
  position: absolute;
  top: 7px;
  width: 100vw;
  height: 100%;
  z-index: -1;
  left: calc(-50vw + 50%);
  background-color: inherit;
}

.sticker-background {
  position: absolute;
  display: block;
  bottom: calc(100% - 1px);
  left: 0;
  right: 0;
  margin: auto;
  z-index: 10;
  width: 100%;
  height: 200%;
}