koodiklinikka.fi/styles/_header.scss

$headerHeight: 400px;
.header {
  background: url("/static/images/jumbo.jpg");
  background-position: bottom center;
  background-size: cover;
  height: $headerHeight;
  overflow: hidden;
  position: relative;
  width: 100%;
  transform: translateZ(0);

  @media screen and (max-width: 1030px) {
    height: 300px;

    video {
      display: none;
    }
  }
}
.header__container {
  background: #3e7394;
  background: linear-gradient(
    120deg,
    rgba(#085078, 0.8) 10%,
    rgba(#85d8ce, 0.7) 90%
  );
  display: table;
  height: 100%;
  text-align: center;
  vertical-align: middle;
  width: 100%;
}
.header__nav {
  position: absolute;
  left: 90px;
  top: 40px;

  @media screen and (max-width: 810px) {
    left: auto;
    right: auto;
    width: 100%;
  }

  a {
    display: block;
    max-width: 180px;

    @media screen and (max-width: 810px) {
      margin-left: auto;
      margin-right: auto;
    }

    img {
      width: 100%;
    }
  }
}
.header__headline {
  display: table-cell;
  padding: 0 1em;
  vertical-align: middle;
}
.header__title {
  color: #fff;
  display: inline-block;
  font-size: 2.75em;
  letter-spacing: -1px;
  line-height: 1.4em;
  margin: auto;
  max-width: 780px;
  font-family: "Lato", sans-serif;
  font-weight: 900;
  text-align: center;
  text-shadow: 0 2px 0 rgba(#000, 0.1);
  vertical-align: middle;

  @media screen and (max-width: 1030px) {
    font-size: 2em;
    max-width: 640px;
  }

  @media screen and (max-width: 810px) {
    display: block;
    font-size: 1.6em;
    max-width: 440px;
    text-align: center;
  }

  @media screen and (max-width: 410px) {
    font-size: 1.4em;
  }

  a {
    color: inherit;
    text-decoration: underline;
  }
}
.header__video-bg {
  height: 100%;
  position: absolute;
  bottom: 0;
  z-index: -2;

  @media (min-aspect-ratio: 1 / 2) {
    width: 100%;
    height: auto;
  }
}

@-webkit-keyframes spin {
  0% {
    top: 0;
  }
  50% {
    top: -($headerHeight);
  }
  50.0001% {
    top: $headerHeight;
  }
  100% {
    top: 0;
  }
}

@-moz-keyframes spin {
  0% {
    top: 0;
  }
  50% {
    top: -($headerHeight);
  }
  50.0001% {
    top: $headerHeight;
  }
  100% {
    top: 0;
  }
}

@-ms-keyframes spin {
  0% {
    top: 0;
  }
  50% {
    top: -($headerHeight);
  }
  50.0001% {
    top: $headerHeight;
  }
  100% {
    top: 0;
  }
}

@-o-keyframes spin {
  0% {
    top: 0;
  }
  50% {
    top: -($headerHeight);
  }
  50.0001% {
    top: $headerHeight;
  }
  100% {
    top: 0;
  }
}

@keyframes spin {
  0% {
    top: 0;
  }
  50% {
    top: -($headerHeight);
  }
  50.0001% {
    top: $headerHeight;
  }
  100% {
    top: 0;
  }
}

@-webkit-keyframes spin2 {
  0% {
    top: $headerHeight;
  }
  50% {
    top: 0;
  }
  99.99999% {
    top: -($headerHeight);
  }
  100% {
    top: $headerHeight;
  }
}

@-moz-keyframes spin2 {
  0% {
    top: $headerHeight;
  }
  50% {
    top: 0;
  }
  99.99999% {
    top: -($headerHeight);
  }
  100% {
    top: $headerHeight;
  }
}

@-ms-keyframes spin2 {
  0% {
    top: $headerHeight;
  }
  50% {
    top: 0;
  }
  99.99999% {
    top: -($headerHeight);
  }
  100% {
    top: $headerHeight;
  }
}

@-o-keyframes spin2 {
  0% {
    top: $headerHeight;
  }
  50% {
    top: 0;
  }
  99.99999% {
    top: -($headerHeight);
  }
  100% {
    top: $headerHeight;
  }
}

@keyframes spin2 {
  0% {
    top: $headerHeight;
  }
  50% {
    top: 0;
  }
  99.99999% {
    top: -($headerHeight);
  }
  100% {
    top: $headerHeight;
  }
}
.header__members {
  width: 100%;
  height: 100%;
  z-index: -1;
  position: absolute;
  top: 0;
  left: 0;
  .member {
    margin: 0;
    border-radius: 0;
    width: calc(100% / 18);

    @media screen and (min-width: 2000px) {
      width: 5%;
    }
    @media screen and (max-width: 1200px) {
      width: calc(100% / 15);
    }
    @media screen and (max-width: 810px) {
      width: 10%;
    }
    @media screen and (max-width: 450px) {
      width: 20%;
    }
  }
  .members {
    position: absolute;
    overflow: hidden;
    top: 0;
    left: 0;
    right: 0;
    height: $headerHeight;
    animation: spin 40s infinite linear;
    &:first-child {
      z-index: 1;
    }
    &:last-child {
      animation: spin2 40s infinite linear;
    }
  }
}