body {
  margin: 0px;
  background-color: black;
  background: url("../Barvy/abstract-1780386_1920\ -\ kopie.png") no-repeat center center fixed;

}
article.stromecek {
  background-image: url(stromecek.png);
  background-size: contain;
  background-repeat: no-repeat;
  background-position: center;
  height: 840px;
  box-sizing: border-box;
  padding-top: 100px;
}
article.stromecek section {
  display: flex;
  flex-direction: row;
  justify-content: center;
  padding: 0px;
}
.material-icons {
  color: white;
  font-size: 50px;
  padding: 30px 10px;
}