I have a problem with the header. I want this article to be close to the header and the header to move as it scrolls up and down.

<title>TITLE
            <h2>Title</h2>
        <p class="br"></p>
                <h2>TEXT</h2>
                <h3>text_2</h3>
                <p>
                   text text text text text 
                   text text text text text
                   text text text text text
                   text text text text text
                   text text text text text 
                </p>
                <h2>TEXT</h2>
                <h3>text_2</h3>
                <p>
                   text text text text text 
                   text text text text text
                   text text text text text
                   text text text text text
                   text text text text text 
                </p>
                <h2>TEXT</h2>
                <h3>text_2</h3>
                <p>
                   text text text text text 
                   text text text text text
                   text text text text text
                   text text text text text
                   text text text text text 
                </p>
                <h2>TEXT</h2>
                <h3>text_2</h3>
                <p>
                   text text text text text 
                   text text text text text
                   text text text text text
                   text text text text text
                   text text text text text 
                </p>
                <h2>TEXT</h2>
                <h3>text_2</h3>
                <p>
                   text text text text text 
                   text text text text text
                   text text text text text
                   text text text text text
                   text text text text text 
                </p>
                <h2>TEXT</h2>
                <h3>text_2</h3>
                <p>
                   text text text text text 
                   text text text text text
                   text text text text text
                   text text text text text
                   text text text text text 
                </p>
                <h2>TEXT</h2>
                <h3>text_2</h3>
                <p>
                   text text text text text 
                   text text text text text
                   text text text text text
                   text text text text text
                   text text text text text 
                </p>
                <h2>TEXT</h2>
                <h3>text_2</h3>
                <p>
                   text text text text text 
                   text text text text text
                   text text text text text
                   text text text text text
                   text text text text text 
                </p>
        <br>
        <br>
        <br>
        <br>
        <br>
        <br>
            <h2>© Copyright Reserved</h2>

body {
    background-color:white;
    font-family: Verdana, Geneva, Tahoma, sans-serif;
    min-height: 100vh;
    position: relative;
}
*
{
    margin:0;
    padding:0;
    list-style: none;
    text-decoration: none;
    box-sizing: border-box;
}

header , footer {
    position: absolute;
    background-color: #696969;
    width: 100%;
    color: white;
}

header {
    height: 9vh;
    top:0;
    position: sticky;
    margin-bottom: 10px;
}

footer {
    height: 10vh;
    bottom:0;
    font-size: 10px;
    position:absolute;
}

header h2 {
    position: absolute;
    margin-top: 20px;
    left: 10%;
}

footer h2 {
    position: absolute;
    right: 3%;
}

article {
    background-color: #6e6363;
    padding: 20px;
    margin-bottom: 20px;
    border-radius: 5px;
}

article p{
    margin-top: 16px;
    line-height: 24px;
}

main {
    width: 90vw;
    margin: 0 auto;
    padding: 30px 20px;
    min-height: calc(100vh - 211px - 58px);
}

article:last-child {
    margin-bottom: 0;
}


article h3 {
    margin: 10px 0 25px 0;
}

.br {margin-bottom: 10em}

/*#header {
    position: fixed;
  }
  
  #content {
    margin-top: 100px;
  }

*/

p {
    padding-bottom: 5px;
}