header {
  margin: 0;
  position: relative;
  background-color: silver;
}

#block-jw-theme-site-branding {
  display: flex;
  flex-wrap: wrap;
}

.block-system-branding-block {
  /*display: flex;*/
  /*flex-direction: column;*/
  /*justify-content: center;*/
  margin-right: 70px;
}

.site-logo {
  margin: 0 2rem 0 0;
  flex: 0 1 50px;
  display: flex;
  align-items: center;
}

.site-logo img {
  width: 100%;
  height: auto;
}

.name-slogan {
  display: flex;
  flex-wrap: wrap;
  flex-direction: column;
  justify-content: center;
}

.site-name {
  font-size: 1.7rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.site-slogan {
  font-size: 1.6rem;
  font-weight: bold;
}

.burger {
  width: 33px;
  height: 29px;
  margin: 0 1rem 0 0;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: absolute;
  top: 20px;
  right: 10px;
}

.burger span {
  display: block;
  width: 100%;
  height: 5px;
  background-color: black;
  margin: 0 0 0 0;
  padding: 0;
  line-height: 100%;
}

@media screen and (min-width: 767px) {
  header {
    background-color: transparent;
  }

  .block-system-branding-block {
    width: 100%;
    margin: 0;
    padding: 1.5rem 0;
    display: flex;
    flex-direction: row;
    /*justify-content: center;*/
  }

  .site-logo {
    margin: 0 2rem 0.3rem 0;
    flex: 0 1 100px;
    display: flex;
    align-items: end;
  }


  .name-slogan {
    width: 100%;
  }

  .site-name {
    font-size: 3rem;
  }

  .site-slogan {
    font-size: 2rem;
  }

  .burger {
    display: none;
  }
}