.poll {
  background: #666;
  border: 1px solid black;
  border-radius: 5px;
  color: white;
  display: block;
  font-size: 15px;
  margin-top: 3px;
  padding: 5px 0;
  text-align: center;
  text-decoration: none;
  text-transform: uppercase;
  transition: background 0.3s linear;
  -webkit-transition: background 0.3s linear;
  -moz-transition: background 0.3s linear;
  -ms-transition: background 0.3s linear;
  -o-transition: background 0.3s linear;
}

.poll:hover{
  background: black;
  box-shadow: inset 0 2px 5px rgba(0, 0, 0, 0.4);
  color: white;
  text-decoration: none;
}

.completed, .completed:hover {
  background-color: lightgray;
  box-shadow: inset 0 2px 5px rgba(0, 0, 0, 0);
  color: grey;
  cursor: default;
}

.completed:before {
  color: green;
  content: "\2713\0020";
}

.current, .current:hover {
  background-color: white;
  box-shadow: inset 0 2px 5px rgba(0, 0, 0, 0);  
  color: black;
  font-weight: bold;
}