body {
    margin: 0 0 0 0;
    padding: 0 0 0 0;
    background: #f3f3f3;
    font-family: Arial, Helvetica, sans-serif;
    font-size: 16px;
}

.container {
    width: 70%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0px;
    margin: 0 auto;
}

h1 {
    font-size: 40px;
    text-align: center;
    padding: 30px;
    background: rgb(20, 20, 20);
    color: #FFF;
    display: block;
    margin: 30% 0 20px 0;
}

h2 {
    margin-top: 100px;
    font-size: 25px;
    text-align: center;
}

p {
    text-align: center;
    margin: 0 0 10px 0;
}

a {
    color:rgb(20, 20, 20);
    text-decoration: none;
}



footer {
    width: calc(100% - 40px);
    text-align: center;
    padding: 20px;
    background-color: rgb(20, 20, 20);
    color: #fff;
    position: absolute;
    bottom: 0px;
  }

  footer a {
    color: #fff;
  }

  footer a:hover {
    text-decoration: underline;
}

  .inhalt {
    width: 70%;
    margin: 0 auto;
    margin-bottom: 100px;
}

.btn
{
padding: 10px 20px;
background: none;
border: rgb(20, 20, 20) solid 2px;
}

.btn:hover{
    padding: 10px 20px;
    background: rgb(20, 20, 20);
    border: rgb(20, 20, 20) solid 2px;
    color: #fff;    
}