html{
    height: 100%;
}
 body {
        font-family: Arial, sans-serif;
        margin: 0;
        padding: 0;
        height: 100%;
     
       
    }

    .letterhead {
        
        padding: 20px;
        margin: 0;
      
        width: 50%;
        margin: auto;
        box-sizing: border-box;
        box-shadow: 0px 2px 9px 3px #848282;
     
       
    }

    .header, .footer {
        text-align: center;
    }

    .content {
        margin-top: 20px;
    }

    table {
        width: 100%;
        border-collapse: collapse;
        margin-top: 20px;
    }

    table, th, td {
        border: 1px solid #000;
        text-align: center;
    }

    th, td {
        padding: 8px;
        text-align: center;
    }
            .test_name{
                text-align: center;
    font-weight: 600;
    width: 100% !important;
    display: block;
    margin-top: 20px;
    font-size: 24px;
}

.sidebar  {
    width: 20%;
    height: 100% !important;
    position: absolute;
    left: 0;
    box-shadow: 3px -4px 6px 0px darkgrey;
}
.sidebar input{
    display: block;
    height: 28px;
    border:1px solid darkcyan;
    border-radius: 6px;
    width: 90%;
    margin: auto;
}
.btn-group{
    display: flex;
    justify-content: space-evenly;
    margin-top: 20px;
}
.btn{
    background: #dddddd;
    border:none;
    padding-left: 20px;
    padding-right: 20px;
    padding-top: 10px;
    padding-bottom: 10px;
    border-radius: 6px;
    color: black;
    cursor: pointer;
    transition: .3s;
    width: 50%;
    border: 1px solid;
}
.btn:hover{
    background: #857c88;
}