style.css dosyanızdaki kırmızı ile işaretlediğim yerleri silin.

/* RESET */
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, ins, kbd, q, s, samp,
small, strike, strong, sub, sup, tt, var,
dl, dt, dd, ol, ul, li,
fieldset, form, label, legend,
table, caption, tbody, tfoot, thead, tr, th, td {
border: 0;
font-style: inherit;
font-weight: inherit;
margin: 0;
outline: 0;
padding: 0;
vertical-align: baseline;
}