body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
  background-image: url(https://images.pexels.com/photos/1695052/pexels-photo-1695052.jpeg?auto=compress&cs=tinysrgb&w=1260&h=750&dpr=1);
  height: auto;
}

table {
  border-collapse: separate;
  border-spacing: 15px;
}


#menu {
  font-size: large;
  position: fixed;
  top: 0;
  left: 0;
  color: rgb(0, 0, 0);
}


#menu button {
  font-size: xx-large;
  background-color: white;
  color: rgb(0, 0, 0);
  padding: 20%;
  border-top-right-radius: 15%;
  border-bottom-right-radius: 15%;
  border: none;
  animation: pulse 5s infinite;
}

#menu-list {
  list-style-type: none;
  margin: 0;
  padding: 0;
}

#menu-list li {
  position: relative;
  left: -300%;
  transition: all .5s ease-in-out;
}

#menu-list li.visible {
  left: 0;
  opacity: 1;
}

#menu-list li a {
  font-size: xx-large;
  display:block; 
  text-decoration:none; 
  padding: top 20%; 
  padding: bottom 20%; 
  animation: pulse 5s infinite;
  background-color:#ffffff;
  
}

button {
  animation: pulse 5s infinite;
  width: 150px;
}

#menu-list li button {
  display:block; 
  text-decoration:none; 
  padding: top 20%; 
  padding: bottom 20%;; 
}

#menu-list li button span {
    display:flex;
    width: 60%;
}

.zettel {
  margin-left: 25%;
}

span {
  font-size: 70%;
}



@media screen and (max-width: 600px) {
  .zettel {
    width: 500px;
  }
}

@keyframes pulse {
  0% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.1);
  }
  100% {
    transform: scale(1);
  }
}