#image-container {
  top: 0;
  left: 0;
  width: 100%;
  height: 500px;
  background-image: url('/img/bg.jpg');
  background-size: cover;
  background-position: center;
}
.trix-button--icon-increase-nesting-level,
.trix-button--icon-decrease-nesting-level,
.trix-button--icon-strike,
.trix-button--icon-code,
.trix-button--icon-attach { display:none; }