body {
  background-color: thistle;
}
h1 {
  color: #4A3267;
  font-size: 40px;
  font-family: sans-serif;
  text-align: center;
}

.stranka {
  background-color: #F3D9E5;
  max-width: 80%;
  margin-right: auto;
  margin-left: auto;
  padding: 20px;
}
p {
  text-align: center;
  max-width: 70%;
  margin-right: auto;
  margin-left: auto; 
}

.galerie img {
  max-width: 300px;
  height: auto;
  display: block;
  margin-right: auto;
  margin-left: auto; 
  margin-top: 30px;
}