body {
  font-family:arial,helvetica,sans-serif;
  font-size:12px;
  background-image: url("time.gif"); 
  background-repeat: no-repeat; 
  background-attachment: fixed;
}

input[type=checkbox]{
  vertical-align: middle ;
  margin-left: 10px;
}

input[type=submit]{
  vertical-align: middle ;
  margin-left: 10px ;
  transition-duration: 0.4s;
  padding: 10px 45px;
}

input:hover[type=submit]{
  background-color: #A9A9A9;
  color: white;
  font-size: 20px;
}

table {
 margin: auto;
 text-align: center;
 max-width: 500px;
 border: 1px;
}

.btn-correx {
  text-align: right;
  transition-duration: 0.4s;
  float: right;
  padding: 3px 28px;
}

.btn-cal {
  text-align: right;
  transition-duration: 0.4s;
  float: right;
  padding: 3px 15px;
}

.btn:hover {
  background-color: #A9A9A9;
  color: white;
}

#bbody {
  margin: auto;
  text-align: center;
}

#content {
 text-align: center;
 table-layout: fixed;
 width: 70%;
 border: 1px solid black;
}

#headerr {
  height:40px;
  padding:0px;
  text-align: left;
  font-size:36px;
  font-weight:bold;
  margin-bottom: 0px;
}

#time {
  text-align: center;
  font-size:70px;
  font-weight: bold;
  margin-top: 0px;
  margin-bottom: 0px;
}

#wrapper {
  width:75%;
  margin:0px auto;
  padding:0px;
}

#xbuttonn {
 margin: 0px auto;
 text-align: center;
}