* {
  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;
  }
}