body::before {
    background-size: cover;
    background-attachment: fixed;
    content: '';
    will-change: transform;
    z-index: -1;
    left: 0;
    right: 0;
    bottom: 0;
    top: 0;
    position: fixed;
    font-family: 'Roboto';
    background-color: #C4C4C4;
}

@media (max-width: 512px)  and (-webkit-min-device-pixel-ratio: 1.5),
       (max-width: 512px)  and (min-resolution: 1.5dppx),
       (max-width: 1024px) and (-webkit-max-device-pixel-ratio: 1.5),
       (max-width: 1024px) and (max-resolution: 1.5dppx) {
  body::before {
    background-image: url('images/bg_nb_1024.jpg');
  }
}
@media (min-width: 513px)  and (max-width: 1024px) and (-webkit-min-device-pixel-ratio: 1.5),
       (min-width: 513px)  and (max-width: 1024px) and (min-resolution: 1.5dppx),
       (min-width: 1025px) and (max-width: 2048px) and (-webkit-max-device-pixel-ratio: 1.5),
       (min-width: 1025px) and (max-width: 2048px) and (max-resolution: 1.5dppx)  {
  body::before {
    background-image: url('images/bg_nb_2048.jpg');
  }
}
@media (min-width: 1025px) and (-webkit-min-device-pixel-ratio: 1.5),
       (min-width: 1025px) and (min-resolution: 1.5dppx),
       (min-width: 2049px) and (-webkit-max-device-pixel-ratio: 1.5),
       (min-width: 2049px) and (max-resolution: 1.5dppx) {
  body::before {
    background-image: url('images/bg_nb_2880.jpg');
  }
}

h1 {
  letter-spacing: 12px;
  margin: 0 0 0 4px;
  color: white;
  font-family: inherit;
  font-weight: 500;
  line-height: 1.2;
  margin: 40px;
}

.list-inline li {
  display: inline-block;
  margin-right: 20px;
  margin-bottom: 30px;
  z-index: 400;
}

#contact {
  position: fixed;
  display: block;
  right: 0;
  bottom: 0;
  margin-right: 40px;
  margin-bottom: 40px;
  z-index: 900;
}

#content {
  margin: 0px;
}