.header {
  padding: 60px;
  text-align: center;
  color: white;
  font-size: 30px;
  font-family: monospace;
  background-color: rgb(120,120,120)
}

.footer {
  padding: 60px;
  text-align: center;
  color: white;
  font-size: 30px;
  font-family: monospace;
  background-color: rgb(120,120,120)

}

footer:a {
  color:red;
}

body {
  background-color: rgb(80,80,80)
}

ul {
  list-style-type: none;
  margin: 0;
  padding: 0;
  overflow: hidden;
  background-color: rgb(50,50,50);
}

li {
  float: left;
}

li a {
  padding: 16px;
  font-family: monospace;
  display: block;
  text-align: center;
}

a {
  text-decoration: none;
  color: white;
}

a:hover {
  color: gray;
  background-color: rgb(10,10,10);
}

#Impressum {
  text-decoration: none;
  font-family: monospace;
  font-size: 120%;
  text-align: left;
  color: white;
  display: block;
  padding: 50px;
}
#Impressum:hover {
  text-decoration: underline;
  background-color: rgb(80,80,80);
}
#Datenschutz {
  text-decoration: none;
  font-family: monospace;
  font-size: 120%;
  text-align: right;
  color: white;
  display: block;
  padding: 50px;
}
#Datenschutz:hover {
  text-decoration: underline;
  background-color: rgb(80,80,80);
}




#photos {
  /* Prevent vertical gaps */
  line-height: 0;

  -webkit-column-count: 3;
  -webkit-column-gap:   0px;
  -moz-column-count:    3;
  -moz-column-gap:      0px;
  column-count:         3;
  column-gap:           0px;
}

#photos img {
  /* Just in case there are inline attributes */
  width: 100% !important;
  height: auto !important;
}

@media (max-width: 1200px) {
  #photos {
  -moz-column-count:    3;
  -webkit-column-count: 3;
  column-count:         3;
  }
}
@media (max-width: 1000px) {
  #photos {
  -moz-column-count:    3;
  -webkit-column-count: 3;
  column-count:         3;
  }
}
@media (max-width: 800px) {
  #photos {
  -moz-column-count:    2;
  -webkit-column-count: 2;
  column-count:         2;
  }
}
@media (max-width: 400px) {
  #photos {
  -moz-column-count:    1;
  -webkit-column-count: 1;
  column-count:         1;
  }
}