html, body {
  max-width: 100%;
  overflow-x: hidden;
}

@media (max-width:991px) {
    body.poster {
        margin-top: 60vh;
    }
}

body.poster {
    background-attachment: fixed;
}

.top-5 {
    top: 5px;
}

@media (max-width: 768px) {
  .display-4 {
    font-size: 2rem !important;
  }
}