.exbox{
  border:2px solid #eeeeee;
  padding:10px;
  border-radius:5px;
  background-color:white;
  margin:5px;
  box-shadow:2px 2px 4px 1px rgba(60,60,60,.25);
}
table{
  background-color: white;
  width:100%;
}
td,th{
  background-color: lightgreen;
  font-size: 20px;
  margin:3px;
  border-radius: 5px;
  padding: 10px;
}
.big_button{
  font-size:15px;
  width:50%;
  padding:20px;
  border:3px solid blue;
  border-radius:5px;
}
.timer {

  float:right;
  text-align:center;
  font-size: 20px;
  color: white;
  font-weight: bold;
  background: #0066ff;
  padding: 10px 10px;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
}
#submit{
  font-size:25px;
  border-radius:5px;
  padding:10px;
  color:white;
  background:#0066ff;
  margin:auto;
}
#time_left_info{
  background-color:
}