.fixTableHead { 
      overflow-y: auto; 
      table-layout: fixed;
      border-collapse: collapse;
      display: block;
    } 
.fixTableHead thead {
        background: black;
        color: #fff;
	font-size: 1em;
      }
.fixTableHead thead th { 
      position: sticky; 
      top: 0px; 
      text-align: center;
    } 

.fixTableHead tbody {
     
     overflow: auto;
     display: block;
 }

.fixTableHead tbody tr:nth-child(even){background-color:#e8e8e8;}

 table { 
      border-collapse: collapse;         
    } 
 th, 
 td { 

      border: 2px solid #529432; 
      text-align: center;
    } 
 th { 
      background: #ABDD93; 
    } 
/* ------------------------------------------------
                        button 
---------------------------------------------------*/
.btn {
    display: inline-block;
    position: relative;
    z-index: 1;
    min-width: 200px;
    background: #FFFFFF;
    border: 2px solid goldenrod;
    border-radius: 4px;
    color: goldenrod;
    font-size: 1rem;
    text-transform: uppercase;
    font-weight: bold;
    text-align: center;
    text-decoration: none;
    overflow: hidden;
    transition: 0.5s;
    padding: 10px 20px;
}
.btn span {
    position: absolute;
    width: 25%;
    height: 100%;
    background-color: goldenrod;
    transform: translateY(150%);
    border-radius: 50%;
    left: calc((var(--n) - 1) * 25%);
    transition: 0.5s;
    transition-delay: calc((var(--n) - 1) * 0.1s);
    z-index: -1;
}
.btn:hover,
.btn:focus {
    color: black;
}
.btn:hover span {
    transform: translateY(0) scale(2);
}
.btn span:nth-child(1) {
    --n: 1;
}
.btn span:nth-child(2) {
    --n: 2;
}
.btn span:nth-child(3) {
    --n: 3;
}
.btn span:nth-child(4) {
    --n: 4;
}

/* ------------------------------------------------
                        schedule 
---------------------------------------------------*/
.schedule_week{
     width:100px;
}
.schedule_date{
     width:100px;
}
.schedule_title{
     width:500px;
     text-align: left;
}
.schedule_description{
     width:400px;
     text-align: left;

}

/* ------------------------------------------------
                        score
---------------------------------------------------*/

 .failed {
     border: 2px solid #529432; 
     text-align: center;
     color: red;

   }
 .student_name{
     width:80px;
     font-size: 1em;
   }
 .student_score{
     text-align: center;
     font-size: 0.775em;
   }
  
}
/* ------------------------------------------------
                        list
---------------------------------------------------*/
ul li::marker{
     color: #D2228C;
}
/* ------------------------------------------------
                        content
---------------------------------------------------*/
.container{
    display: flex;
    justify-content: start;
    flex-wrap: wrap;
    margin: auto;
    max-width: 100%
}
.item{
    margin: 30px;
}

/* ------------------------------------------------
                        login 
---------------------------------------------------*/
#popupbox{
    margin: 0; 
    margin-left: 40%; 
    margin-right: 40%;
    margin-top: 50px; 
    padding-top: 10px; 
    width: 20%; 
    height: 150px; 
    position: absolute; 
    background: #FBFBF0; 
    border: solid #000000 2px; 
    z-index: 9; 
    font-family: arial; 
}