body {
  font-size: 120%;
  font-family: "Helvetica Neue", Arial, sans-serif;
  line-height: 1.4;
  color: #263238;
  background-color: #ffffff;
  margin: 0;
}
h1 {
  font-size: 3rem;
  font-weight: normal;
  text-align: center;
  padding: 2rem;
  margin: 0;
}
h2 {  font-size: 2rem;
  font-weight: normal;
  text-align: center;
  margin: 0}
  h3{  font-size: 1.5rem;
    font-weight: normal;
    text-align: center;
    margin: 0}
nav {
  background-color: #bbbbbb;
  color: white;
}
nav a.aktuell {font-weight: bold; color: yellow;}
.navi ul {
  max-width: auto;
  margin: auto;
  padding: 0;
  background: #bbbbbb;
  list-style: none;
  border-radius: 0.2rem;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
}
/* .navi li {
border: 1px solid black;
border-radius: 0.2em;
} */
.navi a {
  text-decoration: none;
  color: #ffffff;
  text-align: center;
  padding: 0.5rem 1rem;
  display: block;
}
.navi a:hover {
  color: #ffffff;
background-color: #111111;
}
main {
  max-width: 100rem;
  margin: auto;
  display: flex;
}
/*article {
  width: 25%;
  margin: 1rem;
} */
img {
  max-width: 100%;
  height: auto;
}
@media screen and (min-width: 1px) {
article {max-width: 100%;}
.einespalte {font-size: 120%; line-height: 1.4; color: #263238; width: auto; margin: 1rem; display: block;}
.zweispalten {font-size: 0%; line-height: 0; color: #ffffff; width: 0%; margin: 0rem; display: flex;}
.dreispalten {font-size: 0%; line-height: 0; color: #ffffff; width: 0%; margin: 0rem; display: flex;}
.vierspalten {font-size: 0%; line-height: 0; color: #ffffff; width: 0%; margin: 0rem; display: flex;}

}
@media screen and (min-width: 500px) {
  article {max-width: 50%;}
.einespalte {font-size: 0%; line-height: 0; color: #ffffff; width: 0%; margin: 0rem; display: flex;}
.zweispalten {font-size: 120%; line-height: 1.4; color: #263238; width: auto; margin: 1rem; display: block;}
.dreispalten {font-size: 0%; line-height: 0; color: #ffffff; width: 0%; margin: 0rem; display: flex;}
.vierspalten {font-size: 0%; line-height: 0; color: #ffffff; width: 0%; margin: 0rem; display: flex;}
}
@media screen and (min-width: 2300px) {
  article {max-width: 33%;}
.einespalte {font-size: 0%; line-height: 0; color: #ffffff; width: 0%; margin: 0rem; display: flex;}
.zweispalten {font-size: 0%; line-height: 0; color: #ffffff; width: 0%; margin: 0rem; display: flex;}
.dreispalten {font-size: 120%; line-height: 1.4; color: #263238; width: auto; margin: 1rem; display: block;}
.vierspalten {font-size: 0%; line-height: 0; color: #ffffff; width: 0%; margin: 0rem; display: flex;}
}
@media screen and (min-width: 3500px) {
  article {max-width: 25%;}
.einespalte {font-size: 0%; line-height: 0; color: #ffffff; width: 0%; margin: 0rem; display: flex;}
.zweispalten {font-size: 0%; line-height: 0; color: #ffffff; width: 0%; margin: 0rem; display: block;}
.dreispalten {font-size: 0%; line-height: 0; color: #ffffff; width: 0%; margin: 0rem; display: flex;}
.vierspalten {font-size: 120%; line-height: 1.4; color: #263238; width: 25%; margin: 1rem; display: block;}
}
footer {
  background-color: #263238;
  color: #ffffff;
  padding: 2rem;
  margin-top: 1rem;
}