moz-box-shadow: inset 0px 0px 5px #c1c1c1 webkit-box-shadow: inset 0px 0px 5px #c1c1c1 Related: Simple CSS Code Examples You Can Learn in 10 Minutes url('') īox-shadow: rgba(0, 0, 0, 0.19) 0px 10px 20px, rgba(0, 0, 0, 0.23) 0px 6px 6px Open the styles.css file and paste the following code: Each tag contains tags (Table Data) which holds the display screen and buttons of the calculator. The structure of the calculator is created using the tag. The tag contains five rows which represent five horizontal sections of the calculator. Simple Calculator using HTML, CSS and JavaScript Related: Steps to Understanding Basic HTML Code Open the index.html file and paste the following code: