.card {
  box-shadow: 0 12px 12px 0 rgba(0, 0, 0, 0.5);
  max-width: 300px;
  margin: auto;
  text-align: center;
  font-family: arial;
  border-radius: 25px;    
}
       
button {
  border: none;
  outline: 0;
  display: inline-block;
  padding: 8px;
  color: white;
  background-color: #000;
  text-align: center;
  cursor: pointer;
  width: 100%;
  font-size: 18px;
}

a {
  text-decoration: none;
  font-size: 22px;
  color: black;
}

button:hover, a:hover {
  opacity: 0.7;
}

a { -webkit-tap-highlight-color: rgba(0,0,0,0); }