body{
    width: 100%;
    height: 100vh;
    /*display: flex;*/
    justify-content: center;
    align-items: center;
    /*background: linear-gradient(45deg, #0a0a0a, #3a4452);*/
    background-color: lightyellow;
    font-size: 1.5rem;
}
.pagehead{
  display: block;
  text-align: center;
  border-top: 2px solid lightseagreen;
  background: linear-gradient(yellow, lightseagreen);
  padding: 0.2rem 0.2rem 0.2rem 0.2rem;
  float:center;
  margin: 0.5rem;
  font-size: 32px;
}
.eqn{
    width: 3rem;
}
.container{
    /*border: 1px solid #717377;*/
    padding: 1rem;
    border-radius: 1.2rem;
    background-color: whitesmoke;
    margin-left: 25%;
    margin-right: 25%;
    margin-top: 2rem;
    /*background: transparent;
    background: linear-gradient(45deg, #0a0a0a, #3a4452);*/
    box-shadow: 0px 3px 15px rgba(133, 115, 119, 0.5);
}
.container:hover{
    border-radius: 0.5rem;
    box-shadow: 0px 3px 15px rgba(133, 115, 119, 1.0);
}
.subbtn{
    height:auto;
    width:auto;
    background-color:#81cdc6;
    font-size: 1.5rem;
    border: 1px solid teal;
    margin: 0.5rem 0.2rem 0.2rem 0.2rem;
}
.subbtn:hover{
    background: linear-gradient(90deg, #81cdc6);
    color: white;
    box-shadow: 0px 3px 15px rgba(10, 11, 19, 0.5);
}
.subbtn2{
   background-color: none;
}
input{
    font-size: 20px;
}
.secont {
display: flex;
flex-wrap: wrap;
justify-content: space-between;

}

.section {
flex-basis: calc(50% - 20px);

box-sizing: border-box;
}

@media (max-width: 768px) {
.section {
  flex-basis: 100%;
  width: 100%;
}
.eqn{
    width: 30px;
}
.container{
  margin: 10px;
}
.mat3{
  font-size: 17px;
}

}
ul{
margin: 0;
}

.next{
background-color: #04AA6D;
color: white;
font-size: 18px;
margin-top: 0.5rem;
align-content: center;
text-align: center;
padding: 8px 16px;
text-decoration: none;
width:8rem;
float:right;
}
.next:hover {
background-color: #ada;
color: black;
}
.previous{
display: block;
float:left;
background-color: #04AA6D;
color: white;
font-size: 18px;
margin-top: 0.5rem;
align-content: center;
text-align: center;
padding: 8px 16px;
text-decoration: none;
width:5rem;
}
.previous:hover {
background-color: #ada;
color: black;
}