.ac{
  position: fixed;
  bottom: 0;
  left: 0;
  background: #f1f1f1; 
  width: 100%;  
  color: #000;
  padding: 10px;
  text-align: center;
}
.ac a{
  text-decoration: underline;
}
.ac .btn{
  color: #262628;
  font-weight: bold;
  text-decoration: none;
  border: solid 1px #262628;
}
.ac .btn:hover{
  color: #ffffff;
  background-color: #262628;
}