.bannera {
  position: absolute;
  left: 50%;
  display: block;
  margin: 100px -200px;
  width: 400px;
  height: 60px;
  border: 1px solid #8a1;
  font: normal 30px/60px 'Rye';
  text-align: center;
  color: #451;
  background: #9b2;
  border-radius: 4px;
  box-shadow: 0 0 30px rgba(0,0,0,.15) inset,
                    0 6px 10px rgba(0,0,0,.15);
}

.bannera::before,
.bannera::after {
  content: '';
  position: absolute;
  z-index: -1;
  left: -70px;
  top: 24px;
  display: block;
  width: 40px;
  height: 0px;
  border: 30px solid #9b2;
  border-right: 20px solid #791;
  border-bottom-color: #94b81e;
  border-left-color: transparent;
  transform: rotate(-5deg);
}

.bannera::after {
  left: auto;
  right: -70px;
  border-left: 20px solid #791;
  border-right: 30px solid transparent;
  transform: rotate(5deg);
}