.exercise-container {
  background: url('/images/bg-blue-op.png') repeat !important;
  background-size: 200px 200px !important;
  opacity: 1 !important;
}

.exercise-container::before {
  content: '';
  position: absolute;
  inset: 0;
  z-index: 0;
  background: inherit;
  opacity: 0.75;
  pointer-events: none;
  display: block;
}

.exercise-container > * {
  position: relative;
  z-index: 1;
  opacity: 1 !important;
}