body {
  background: url('poezija images/bthrm.jpg') center/cover no-repeat fixed;
  font-family: 'Libre Baskerville', serif;
}

.note {
  box-shadow: 0 4px 20px rgba(0,0,0,0.4);
  transform: rotate(calc(var(--random-angle, 0deg)));
}

/* if you want a colored overlay on the wall */
#wall::before {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0.3);
  pointer-events: none;
}