*{
  margin:0;
  padding:0;
  box-sizing:border-box;
}



.gpa-container{
    max-width:650px;
    margin:auto;
    background:#fff;
    padding:20px;
    border-radius:8px;
   box-shadow: rgba(99, 99, 99, 0.2) 0px 2px 8px 0px; }



.gpa-mode{
    text-align:center;
    margin-bottom:15px;
}

.gpa-mode select{
    padding:8px;
    width:200px;
    max-width:100%;
}

.gpa-table-wrapper{
    overflow-x:auto;
}

.gpa-container table{
    width:100%;
    border-collapse:collapse;
    min-width:600px;
}

.gpa-container th, .gpa-container td{
    padding:10px;
    border:1px solid #ddd;
    text-align:center;
}

.gpa-container input, .gpa-container select{
    padding:8px;
    width:100%;
    box-sizing:border-box;
}

.gpa-container button{
    padding:10px 15px;
    border:none;
    background:#007bff;
    color:#fff;
    cursor:pointer;
    border-radius:4px;
}

.gpa-container button:hover{
    background:#0056b3;
}

.gpa-buttons{
    margin-top:15px;
    text-align:center;
}

.gpa-buttons button{
    margin:5px;
}

.gpa-result{
    display:none;
    margin-top:20px;
    padding:15px;
    background:#e9f5ff;
    border-left:4px solid #007bff;
    font-size:18px;
}

/* Mobile Responsive */
@media(max-width:768px){

  .gpa-container   table{
        min-width:100%;
    }

    .gpa-container th, .gpa-container td{
        font-size:14px;
        padding:8px;
    }

    .gpa-buttons button{
        width:100%;
        margin:8px 0;
    }

    .gpa-mode select{
        width:100%;
    }
}