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, 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,
article, aside, canvas, details, embed, 
figure, figcaption, footer, header, hgroup, 
menu, nav, output, ruby, section, summary,
time, mark, audio, video {
    margin: 0;
    padding: 0;
    border: 0;
    font-size: 100%;
    font: inherit;
    vertical-align: baseline;
}
body{
    background-color: black;
}
.main{
    position: relative;
    max-width: 880px;
    width: 100%;
    margin: 0 auto;
}

.img{
    display: block;
    width: 100%;
}

.btn1{
    position: absolute;
    width: 80%;
    height: 5.7%;
    top: 80%;
    left: 10%;
}
.btn2{
    position: absolute;
    width: 80%;
    height: 5.7%;
    top: 86%;
    left: 10%;
}