Set up Hugo

Set up the Hugo static site generator with a new custom theme,
generating exactly what we have right now.

public/css/style.css

@@ -0,0 +1,91 @@
+* {
+  margin: 0;
+  padding: 0;
+}
+
+body, html {
+  box-sizing: border-box;
+  height: 100%;
+  font-size: 16px;
+}
+
+*, *:before, *:after {
+  box-sizing: inherit;
+}
+
+body {
+  background-color: #fff;
+  color: #232323;
+  font-family: 'Open Sans', sans-serif;
+  text-rendering: optimizeLegibility;
+  text-align: center;
+}
+
+html, body, #wrapper {
+  min-height: 100%;
+}
+
+#wrapper {
+  min-height: 100%;
+  margin: 0 auto;
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+  justify-content: center;
+}
+
+header {
+  height: 100%;
+  max-width: 90%;
+  margin: 0 auto 10vh;
+  text-align: center;
+}
+
+header h1 {
+  display: inline-block;
+  margin-bottom: 2rem;
+  margin-right: -0.25em; /* fix trailing space from letter-spacing */
+  font-size: 7vw;
+  font-weight: 700;
+  letter-spacing: 0.5em;
+  text-transform: uppercase;
+  background: #232323 url(https://kredits.kosmos.org/img/bg-947d3bf6bb15a1a3b07afcba4c307690.jpg);
+  background-size: cover;
+  background-repeat: no-repeat;
+  -webkit-text-fill-color: transparent;
+  -webkit-background-clip: text;
+}
+
+header h2 {
+  font-weight: 300;
+  font-size: 1.4rem;
+}
+
+main {
+  width: 768px;
+  max-width: 90%;
+  text-align: left;
+}
+
+main p {
+  line-height: 1.6em;
+  margin-bottom: 1em;
+}
+
+.hidden {
+  display: none !important;
+}
+
+@media screen and (max-width: 760px) {
+  header {
+    margin-top: 4rem;
+  }
+
+  header h1 {
+    font-size: 8vw;
+  }
+
+  footer {
+    margin-bottom: 4rem;
+  }
+}