body{
    text-align: center;
    background-color: aliceblue;
    color: green;
    font-family: 'Rowdies';
    margin: 15px;
    position: relative;
}
nav{
    text-align: right;
}
button, #filter{
    font-size: 20px;
    margin: 7px;
    padding: 7px;
    font-family: 'Rowdies';
    color: green;
    background-color: white;
}
button{
    border-radius: 25px;
}
button:hover{
    opacity: 50%;
}
#filter option[disabled] {
    color: gray;
}
#filter{
    float: left;
}
p{
    display: inline-block;
}
#addStudentPopup{
    display: flex;
    background-color: rgba(255, 255, 255, 1);
    border: 5px green solid;
    height: 650px;
    width: 1000px;
    border-radius: 50px;
    display: none;
    position: fixed;
    z-index: 1000;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}
#overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 999;
    background-color: rgba(255, 255, 255, 0.5);
}
#addStudentPopupContent{
    display: inline-block;
    width: 100%;
}
input[type="text"]{
    font-family: 'Rowdies';
}
#calender{
    align-content: center;
}
table{
    display: inline-table;
}
.tdpopup{
   border: 1px gray solid; 
   margin: 0px;
   padding: 20px;
   /*padding: 10px 20px 10px 20px;*/
}
#cancel{
    color: gray;
}
.desc{
    font-style: italic;
    color: rgb(170, 170, 170);
    margin: 0px;
}
h3{
    margin-bottom: 0px;
}
.Student{
    border-top: 2px gainsboro solid;
    border-bottom: 2px gainsboro solid;
    margin: 0px;
    color: gray;
    font-size: 20px;
    height: 25px;
}
th:hover{
    opacity: 70%;
}
.optionsButton{
    font-weight: bolder;
    padding: 0px;
    padding-inline: 3px;
    border: none;
    background-color: transparent;
    color: black;
}
.optionsButton:hover{
    border-radius: 0;
    background-color: gainsboro;
}