* {
  box-sizing: border-box;
}
  
body {
  font-family: Arial;
  padding: 10px;
  background: #555555;
}

/* Header/Blog Title */
.header {
  padding: 30px;
  text-align: center;
  background: rgb(26, 26, 26);
  background-image: url(./Bilder/BannerText.png);
  background-repeat: no-repeat;
  background-size: 420px;
  position: relative;
  text-indent: -999999999px;
  background-position: center;
  height: 200px;
}

.header h1 {
  font-size: 50px;
  color: white;
}

div {
  color: white;
}
  
  /* Linkleiste */
.topnav {
  overflow: hidden;
  background-color: rgb(55, 55, 55);
 }
  
  /* Linkleiste Sytle*/
.topnav a {
  float: left;
  display: block;
  color: #ffffff;
  padding: 20px;
  text-decoration: none;
}

  /* Linkleiste Liste */
li {
  position: relative;
  float: left;
  right: 50%;
  margin-right: 10px;
  padding: 0px 40px;
  list-style: none;
}
  
ul.Nav {
  position: relative;
  float: left;
  left: 50%;
  margin: 0 auto;
  padding: 0;
}

  /* Linkleiste Hover */
.topnav a:hover {
  background-color: #ddd;
  color: rgb(0, 0, 0);
}
  
  /* Create two unequal columns that floats next to each other */
  /* Left column */
.leftcolumn {   
  float: left;
  width: 75%;
}
  
  /* Right column */
.rightcolumn {
  float: left;
  width: 25%;
  background-color: #555555;
  padding-left: 20px;
}
  
  /* Add a card effect for articles */
.card {
  background-color: rgb(46, 46, 46);
  padding: 20px;
  margin-top: 20px;
}
  
  /* Clear floats after the columns */
.row:after {
 content: "";
 display: table;
 clear: both;
}
  
  /* Footer */
.footer {
  padding: 20px;
  text-align: center;
  background: rgb(26, 26, 26);
  margin-top: 20px;
  color: rgb(255, 255, 255);
}
  
  /* Responsive layout - when the screen is less than 800px wide, make the two columns stack on top of each other instead of next to each other */
@media screen and (max-width: 800px) {
  .leftcolumn, .rightcolumn {   
    width: 100%;
    padding: 0;
  }
}
  
  /* Responsive layout - when the screen is less than 400px wide, make the navigation links stack on top of each other instead of next to each other */
@media screen and (max-width: 400px) {
  .topnav a {
    float: none;
    width: 100%;
  }
}