Overleaf/services/web/frontend/stylesheets/app/error-pages.less

.full-height {
  height: 100%;
  padding: 0;
}

.error-container {
  display: flex;
  align-items: center;
}

.error-container.full-height {
  margin-top: -(@header-height + @content-margin-vertical) / 2;
}

.error-details {
  flex: 1 1 50%;
  padding: @line-height-computed * 2;
}

.error-status {
  font-family: @font-family-serif;
  margin-bottom: (@line-height-computed / 4);
  color: @gray-dark;
  font-size: @font-size-h1;
}
.error-description {
  font-family: @font-family-serif;
  font-size: @font-size-h3;
  color: @gray;
  margin-bottom: @line-height-computed * 2;
}

.error-btn {
  .btn;
  .btn-primary;
  display: block;
  @media (min-width: @screen-sm-min) {
    display: inline-block;
  }
}