body{
    background-color: black;
    color: lime;
    background-image: url(bilder/matrix_backround.jpeg);
    background-size: cover;
    margin-top: 40px;
}
h1{
    text-align: center;
    font-size: 40px ;

}
.start_game{
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
    top: 300px;
    a{
        text-decoration: none;
        font-size: 50px;
        color: lime;
        padding: 50px;
        outline: 3px solid lime;
        background-color: black;
        background-image: url(bilder/enter_matrix.jpg);
        background-size: cover;
        transition: 0.3s;
    }
    a:hover{
        outline: 3px solid white;
        color: white;
    }
}
#topleft a{
  text-align: center;
  width: 150px;
  height: 20px;
  border: 3px solid black;
  padding-top: 5px;
  padding-bottom: 5px;
  background-color: gray;
  color: black;
  border-radius: 12px;
  font-size: 20px;
  text-decoration: none;
  transition: 0.3s;

}
#topleft{
    position: absolute;
    display: flex;
    z-index: 1;
    left: 10px;
    top: -15px;
    
}
#topleft a:hover{
    opacity: 0;
    text-decoration: none;
}