body{
  background-color: rgb(189, 189, 189);
margin: 0%;
padding: 0%;
}
span{
color: darkslategray;
}
header{
  padding-top: 15px;
  padding-bottom: 15px;
  margin-top: 1.5%;
  text-align: center;
  color: darkslategray;
  font-family:'Gill Sans', 'Gill Sans MT', Calibri, 'Trebuchet MS', sans-serif;
  text-decoration:dotted;
  background-color:rgb(232, 238, 232);

}
/* Style the navigation menu */
.topnav{
  overflow: hidden;
  background-color:white;
  position: relative;
}

/* Hide the links inside the navigation menu (except for logo/home) */
.topnav #links {
  display: none;
}

/* Style navigation menu links */
.topnav a {
  background-color: darkslategray;
  color: white;
  padding: 14px 16px;
  text-decoration: none;
  font-size: 17px;
  display: block;
}

/* Style the hamburger menu */
.topnav a.icon {
  background:darkslategray;
  display: block;
  position: absolute;
  right: 0;
  top: 0;
}

/* Add a grey background color on mouse-over */
.topnav a:hover {
  background-color: green;
  color: white;
}

/* Style the active link (or home/logo) */
.active {
  background-color:darkgray;
 color:white;
}  

strong{
  padding-left: 40%;
}
.students-info{
  margin-top: 2%;
  background-color: whitesmoke;
}
.head{
  background-color: white;
  word-spacing: 3px;
  color: darkslategray;
  box-shadow: black 2px 1px 2.3px;
}
.check{
  padding-left:35%;
  /*background-color: rgb(145, 118, 118);*/
overflow:hidden ;
left: 50%;
}
#num-check{
  background-color: black;
  color: white;
  outline: 0;
  border: 0;

}
.dis-lab{
  display: inline-flex;
}

#boox{
background-color: transparent;
color: black;

}
.row{
display: flex;
margin-left: 5%;
margin-top: 5%;

}
.row2{
word-spacing: 25px;
padding-left: 121px;
}
.reset{
color: white;
background-color: red;
border-radius: 5px;
outline: 0;
border: 0;
}
.reset:hover{
background-color: red;

}
.submit{
background-color: green;
color: white;
border-radius: 5px;
border: 0;
outline: 0;
}
.reg-no{
outline: 0;
border: 0;
color: black;
text-align: center;
border-bottom:2px solid darkslategray;
}