Converting html to wordpress theme

yes i did but i dont know what to write in front of the url
/*
Theme Name: ImamTheme
Theme URI:
Description: A brief description.
Version: 1.0
Author: You
Author URI: Your website address.
*/

Thank you again im done it.
another problem i think is about the css reset.
i use this code:

html, body, div, span, applet, object, iframe,
h1, h2, h3, h4, h5, h6, p, blockquote, pre,
a, abbr, acronym, address, big, cite, code,
del, dfn, em, font, img, ins, kbd, q, s, samp,
small, strike, strong, sub, sup, tt, var,
b, u, i, center,
dl, dt, dd, ol, ul, li,
fieldset, form, label, legend,
table, caption, tbody, tfoot, thead, tr, th, td {
    margin: 0;
    padding: 0;
    border: 0;
    outline: 0;
    font-size: 100%;
    vertical-align: baseline;
    background: transparent;
	font-weight:100;
}
body {
    line-height: 1;
}
ol, ul {
    list-style: none;
}
blockquote, q {
    quotes: none;
}

:focus {
    outline: 0;
}

ins {
    text-decoration: none;
}
del {
    text-decoration: line-through;
}

table {
    border-collapse: collapse;
    border-spacing: 0;
}

but i dont know why in wordpress some of my element were changed. for
example all of my website is into a maincontent div element and it is (in html) stick to the top of the page but into the wordpress it has about 25px space to the top of the page.

i’m checked but both css and html hadn’t any problem.

Does wordpress changing the html tags or tags css default value!!. would you please to help me why this happen to me!!