style.css

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

html,body{
    width: 100%;
    height: 100%;
}

h2{
    color: limegreen;
    font-size: 50px;
    font-family: Cambria, Cochin, Georgia, Times, 'Times New Roman', serif;
}

#hMsg-id{
    padding-top: 10px;
    margin-bottom: 20px;
}

#main{
    width: 100%;
    height: 100%;
    background-color: green;
}

#prc{
    margin-right: 7px;
}

.inp-field{
    margin-left: 5px;
}

.headings{
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    color: yellow;
    font-size: 20px;
    margin-bottom: 8px;
    
}

.field-heads{
    color: skyblue;
    font-size: 18px;
    font-family: 'Lucida Sans', 'Lucida Sans Regular', 'Lucida Grande', 'Lucida Sans Unicode', Geneva, Verdana, sans-serif;
    

}

.field-item1{
    margin-bottom: 6px;
    margin-left: 6px;
}

.field-item2{
    margin-bottom: 15px;
    margin-left: 6px;
}

.buttons{
    text-align: center;
    
}

.addButton{
    background-color: rgb(171, 6, 6);
    color: white;
    margin-right: 20px;
    margin-bottom: 7px;
    padding: 5px;
    width: 60px;
    cursor: pointer;
    border-radius: 5px;
    border: none;
}

.clearButton{
    background-color: rgb(147, 41, 247);
    color: white;
    margin-right: 50px;
    margin-bottom: 7px;
    padding: 5px;
    width: 60px;
    cursor: pointer;
    border-radius: 5px;
    border: none;
}

#midAddButton{
    background-color: rgb(171, 6, 6);
    color: white;
    margin-left: 80px;
    margin-bottom: 5px;
    margin-top: 15px;
    padding: 5px;
    width: 60px;
    cursor: pointer;
    border-radius: 5px;
    border: none;
}

#midClearButton{
    background-color: rgb(147, 41, 247);
    color: white;
    margin-left: 120px;
    margin-bottom: 5px;
    margin-top: 15px;
    padding: 5px;
    width: 60px;
    cursor: pointer;
    border-radius: 5px;
    border: none;
}

.row-heads{
    color: white;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    font-weight: normal;
    font-size: 18px;
    padding: 6px;
}

.dynamic-row td{
    font-family: sans-serif;
    color: white;
    text-align: center;
    padding: 5px;
    font-weight: bold;
}