title: Margin, Padding, Height & width of html and body tags
body: <p>I wrote this code in order to understand what does it margin, padding and position for the below code. the question are between these <code>/* */</code>. Thanks again.</p>
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  <pre class="snippet-code-css lang-css prettyprint-override"><code>html {
    width: auto;
    /* Does auto apply the background-color automatically to the display screen */
    height: 100%;
    /* 100% means 100% of the display browser??*/
    margin-left: 1%;
    margin-right: 1%;
    /*does changing the value of the margin will change anything in the page*/
    margin-top: 1%;
    margin-bottom: 1%;
    padding-left: 1%;
    padding-right: 1%;
    padding-top: 1%;
    Padding-bottom: 0%;
    border: 1px solid black;
    background-color: red;
  }
  
  body {
    background-color: #00FF00;
    width: 50%;
    /* does it means 50% of the width stated above in the html (auto)*/
    height: 50%;
    /*does it means 50% of the height of the display browser or we have to add the padding-top(1%) in html*/
    position: fixed;
    top: 25%;
    /* does it mean that the body is shifted to below 25% of it's heigh or 25% of the display browser? */
    left: 25%;
    /*  what is the different if i give 0% to left and i changed the margin-left value to 25%*/
    border: 2px solid black;
    margin-top: 0px;
    margin-left: 0px;
  }
  
  header {
    width: 50%;
    height: auto;
    top: 25%;
    left: 25%;
    /* what does it mean here the value given to top and left??*/
    border: 2px solid black;
    margin-top: 10%;
    margin-left: 25%;
  }
  
  h1 {
    margin: 5px;
    color: blue;
  }</code></pre>
  <pre class="snippet-code-html lang-html prettyprint-override"><code>&lt;body&gt;
    &lt;header&gt;
      &lt;h1&gt; MY First webpage &lt;/h1&gt;
    &lt;/header&gt;
  &lt;/body&gt;</code></pre>
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