style.css

html {
  height: 100%
}

#center {
  margin-left: 25%;
  margin-right: 25%;
  margin-top: 15%;
  margin-bottom: 10em;
  text-align: center;
}

#bottom {
  margin-left: 25%;
  margin-right: 25%;
  text-align: center;
}

.slogan {
  
}

.value {
  
}

.contact {
  
}