.main-container {
  display: -webkit-box;
  display: -webkit-flex;
  display: -ms-flexbox;
  display: flex;
  width: 100vw;
  height: 100vh;
  -webkit-box-orient: vertical;
  -webkit-box-direction: normal;
  -webkit-flex-direction: column;
  -ms-flex-direction: column;
  flex-direction: column;
  background-image: url('../images/ventilation-01-1920-1200.jpg');
  background-position: 50% 50%;
  background-size: cover;
  background-repeat: no-repeat;
}

.header {
  height: 24vh;
}

.content {
  display: -webkit-box;
  display: -webkit-flex;
  display: -ms-flexbox;
  display: flex;
  -webkit-justify-content: space-around;
  -ms-flex-pack: distribute;
  justify-content: space-around;
  -webkit-box-align: stretch;
  -webkit-align-items: stretch;
  -ms-flex-align: stretch;
  align-items: stretch;
  -webkit-box-flex: 1;
  -webkit-flex: 1;
  -ms-flex: 1;
  flex: 1;
}

.logo {
  margin-top: 0px;
  margin-bottom: 0px;
  border-bottom: 1px solid #fff;
  font-family: 'Changa One', Impact, sans-serif;
  color: #fff;
  font-size: 23vh;
  line-height: 24vh;
  text-align: center;
  text-shadow: 1px 1px 6px #000;
}

.logo-text {
  margin-top: -9vh;
  font-family: 'Changa One', Impact, sans-serif;
  color: #fff;
  font-size: 5vh;
  line-height: 6vh;
  text-align: center;
  letter-spacing: 3px;
  text-shadow: 1px 1px 6px #000;
}

.image-block {
  padding: 4vw 2vw;
}

.image {
  width: 55vh;
  height: 65vh;
  border: 3px solid #fff;
  background-image: url('../images/bild-wisen-667x1000-resolution.jpg');
  background-position: 50% 50%;
  background-size: cover;
  background-repeat: no-repeat;
}

.text-block {
  width: 55vh;
  height: 65vh;
  padding: 2vw;
  border: 3px solid #fff;
  background-color: #000;
}

.text-div-block {
  padding: 4vw 2vw;
}

.mytitle {
  font-family: 'Changa One', Impact, sans-serif;
  color: #fff;
  font-size: 5.3vh;
  line-height: 8vh;
}

.mytext {
  font-family: Exo, sans-serif;
  color: #fff;
  font-size: 3.5vh;
  line-height: 5.5vh;
}

.mytext.ett {
  margin-bottom: 1vw;
  font-size: 3.5vh;
  line-height: 6vh;
}

.body {
  height: 100vh;
}

@media (max-width: 991px) {
  .header {
    height: 22vh;
    -webkit-box-flex: 0;
    -webkit-flex: 0 auto;
    -ms-flex: 0 auto;
    flex: 0 auto;
  }
  .logo {
    font-size: 20vw;
    line-height: 20vw;
  }
  .logo-text {
    margin-top: -7.5vh;
    font-size: 4vh;
    line-height: 5vh;
  }
  .image {
    width: 40vw;
    height: 55vw;
  }
  .text-block {
    width: 40vw;
    height: 55vw;
  }
  .mytitle {
    font-size: 3.5vw;
    line-height: 5vw;
  }
  .mytext {
    font-size: 2vw;
    line-height: 3.5vw;
  }
  .mytext.ett {
    margin-bottom: 4vw;
    font-size: 2.2vw;
    line-height: 3vw;
  }
}

@media (max-width: 767px) {
  .main-container {
    -webkit-box-orient: vertical;
    -webkit-box-direction: normal;
    -webkit-flex-direction: column;
    -ms-flex-direction: column;
    flex-direction: column;
  }
  .header {
    height: 18vh;
  }
  .logo {
    margin-left: 0vw;
    font-size: 31vh;
    line-height: 26vh;
  }
  .logo-text {
    margin-top: -7.5vh;
    font-size: 5.5vh;
    line-height: 6vh;
  }
  .image-block {
    width: 50vw;
    padding-right: 1vw;
    padding-left: 1vw;
  }
  .image {
    height: 60vh;
    margin-top: 3vw;
  }
  .text-block {
    width: 90%;
    height: 60vh;
    margin-top: 3vw;
    margin-left: 2vw;
    padding-top: 3vw;
  }
  .text-div-block {
    width: 50vw;
    padding-right: 1vw;
    padding-left: 1vw;
  }
  .mytitle {
    font-size: 6.5vh;
    line-height: 9vh;
  }
  .mytext {
    font-size: 4.5vh;
    line-height: 6.5vh;
  }
  .mytext.ett {
    margin-bottom: 2vh;
    font-size: 5vh;
    line-height: 6vh;
  }
}

@media (max-width: 479px) {
  .main-container {
    height: 100vh;
  }
  .header {
    height: 30vw;
    -webkit-box-flex: 0;
    -webkit-flex: 0 auto;
    -ms-flex: 0 auto;
    flex: 0 auto;
  }
  .logo {
    margin-top: 0vw;
    font-size: 35vw;
    line-height: 29vw;
  }
  .logo-text {
    margin: -6.7vh -1vh -1vh;
    font-size: 5vh;
    line-height: 7vh;
  }
  .image-block {
    padding-top: 6vw;
  }
  .image {
    width: 45vw;
    height: 60vw;
  }
  .text-block {
    width: 45vw;
    height: 60vw;
  }
  .text-div-block {
    padding-top: 6vw;
  }
  .mytitle {
    font-size: 4.7vw;
    line-height: 9.5vw;
  }
  .mytext {
    font-size: 3.7vw;
    line-height: 7vw;
  }
  .mytext.ett {
    margin-bottom: 4vw;
    font-size: 4vw;
    line-height: 5vw;
  }
}