index.css

@font-face {
  font-family: "Pixelated MS Sans Serif";
  src: url(https://unpkg.com/98.css@0.1.16/dist/ms_sans_serif.woff) format("woff");
  src: url(https://unpkg.com/98.css@0.1.16/dist/ms_sans_serif.woff2) format("woff2");
  font-weight: 400;
  font-style: normal;
}

@font-face {
  font-family:"Pixelated MS Sans Serif";src:url(https://unpkg.com/98.css@0.1.16/dist/ms_sans_serif_bold.woff) format("woff");src:url(https://unpkg.com/98.css@0.1.16/dist/ms_sans_serif_bold.woff2) format("woff2");font-weight:700;font-style:normal;
}

body {
  font-family: "Pixelated MS Sans Serif",Arial !important;
  background-color: #008080;
  background-image: url('https://i.pinimg.com/originals/42/ab/b2/42abb28c017832576edfcd44b91fd683.gif') no-repeat center center fixed;
  image-rendering: pixelated;
  background-size: cover;
}

.posts {
	border-radius: 0 !important;
}

.post {
	box-shadow: inset -1px -1px #0a0a0a, inset 1px 1px #dfdfdf, inset -2px -2px grey, inset 2px 2px #fff !important;
	background: silver !important;
}

.post-text {
	color: #222 !important;
}

.nav-link {
	color: white !important;
};

.post-header {
	background:linear-gradient(90deg,navy,#1084d0);padding:3px 2px 3px 3px;display:flex;justify-content:space-between;
align-items:center
}

.header-link {
	color: white !important;
}

.react-calendar-heatmap text  {
	fill: white !important;
}

/*! Used code of Github repo jdan/98.css */