CSS/pixel.html at main · sanskarsingh77/CSS · GitHub

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<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
        <title>Document</title>
<style>
    #div1{
        background-color: blue;
        height: 100px;
        width: 500px;
        }
        #div2{
            background-color: blueviolet;
            width: 10%;
            height:10%;
            /* isko percentage unit kehte hai */
            /* yaha pe width humne 10% rakhi iska mtlb yeh hai ke iski width iske parent element ke width ki 10% hogi  */
         margin: 10px;
         padding: 10px;
         }
        /* relative unit to font size
        ->em- reletae to parent tag font size
        -> rem- relative to root tag font size root element html tah hota hai uska default size 16px hota ha☻i
          */
          /* relative unit to  viewport -jitna areea displayt me visible hota hai usse viewport kehte hai
        1-vw-is 1/100 *width of viewport
        2-vh-1/100 *height of viewport
                       */
                       #firstpara{
                        background-color: chartreuse;
                       }
</style>
</head>
<body>
    <!-- <div id="div1">
        <div id="div2" ></div>
    </div> -->
<p id="firstpara">this is a paragraph</p>
</body>
</html>