style.css

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;
}
article, aside, details, figcaption, figure, 
footer, header, hgroup, menu, nav, section {
	display: block;
}
body {
	line-height: 1;
}
ol, ul {
	list-style: none;
}
blockquote, q {
	quotes: none;
}
blockquote:before, blockquote:after,
q:before, q:after {
	content: '';
	content: none;
}
table {
	border-collapse: collapse;
	border-spacing: 0;
}
body {
  background: #1f1f1f url(bg.jpg) repeat;
  font-family: sans-serif;
  color: #fff
}

.hi {
  min-height: 100vh;
}

.social a {
  color: #fff;
}

.ssd {
  width: 80vw;
  max-width: 356px;
  height: 374px;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

.rotate {
  display: none;
  position: absolute;
  left: 50%;
  bottom: 50%;
  transform: translate(-50%, -50%);
}

@media (max-width: 767px) and (orientation: portrait) {
  .social {
    width: 80vw;
    text-align: center;
    position: absolute;
    left: 50%;
    bottom: 50px;
    transform: translateX(-50%);
  }

  .social a {
    margin: 0 9px;
  }
}

@media (max-width: 767px) and (orientation: landscape) {
  .social, .ssd {
    display: none;
  }

  .rotate {
    display: initial;
  }
}

@media (min-width: 768px) {
  .hi {
    background: url(pp.jpg) right center no-repeat;
    background-size: contain;
  }

  .social {
    display: flex;
    text-align: center;
    flex-direction: column;
    align-content: center;
    width: 30px;
    position: absolute;
    left: 40px;
    bottom: 50px;
  }

  .social a {
    margin: 9px 0;
  }
}