html, body { 
    margin: 0; 
    padding: 0; 
    border: 0; 
}
body {
  font-family: Montserrat, sans-serif;
  font-size: .9em;
}
p, ul {
  margin: 0.5em 0;
}
a {
  color: black;
}
h1, h2, h3 {
  margin: 0;
}
h1 {
  font-size: 4em;
  line-height: 120%;
}
h2 {
  font-family: "Oswald", sans-serif;
  font-weight: bold; 
  font-size: 2em;
  padding: 1em 0 1em 0;
}
h3 {
  font-family: "Oswald", sans-serif;
  font-weight: bold; 
  font-size: 1em;
}
#romke {
  text-align: center;
}
#header {
  font-family: "Oswald", sans-serif;
  text-align: center;
  font-weight: bold; 
  background-color: #3bb75f;
  padding: 2em 0 2em 0;
}
#header-body {
  max-width: 800px;
  margin: auto;
}
#header-body h1 {
  padding-bottom: .3em;
}
#header-body p {
  font-size: 1.5em;
  margin: 0;
}
#buttons {
  max-width: 800px;
  margin: auto;
  display: flex;
}
#buttons div {
  width: 50%;
  flex-grow: 1;
}
#buttons div:last-child {
  width: 50%;
  flex-grow: 1;
  text-align: right;
}
#intro {
  background-color: #e9e9e9;
}
#intro h2 {
  text-align: center;
}
#intro-body {
  max-width: 800px;
  margin: auto;
  display: flex;
}
#intro-text {
  width: 50%;
  padding-right: 1em;
}
#intro-text p:first-child {
  margin-top: 0;
}
#intro-body {
  padding-bottom: 2em;
}
#intro-image {
  flex: 2;
  width: 50%;
  padding-left: 5em;
  position: relative;
}
#intro-image img {
  width: 300px;
  position: absolute;
  top: 0;
  bottom: 0;
  margin: auto;
}
#small-download-buttons-text {
  float: left;
  padding-right: 1em;
  font-family: "Oswald", sans-serif;
}
#small-download-buttons-buttons {
  display: grid; 
  grid-template-columns: repeat(2, 1fr);
}
#about {
  background-color: #009fe3;
}
#about-body {
  max-width: 800px;
  margin: auto;
  display: flex;
}
#about-text {
  overflow: auto;
  flex-grow: 1;
  width: 50%;
  padding-right: 2em;
  padding-bottom: 2em;
}
#about-stripes {
  width: 50%;
  background-image: url(stripes.png);
}
#footer {
  background-color: black;
  text-align: center;
  color: white;
  padding: .7em 0;
  font-size: .8em;
}
#footer a {
  color: white;
  text-decoration: none;
}
.download {
  font-family: "Oswald", sans-serif;
  font-weight: bold;
  color: black;
  text-decoration: none;
}
.download:hover {
  color: #009fe3;
}
.download.small {
  font-size: 1em;
  padding-left: 1em;
}
.download.large {
  font-size: 2em;
  padding: .8em 0;
  display: inline-block;
}

@media only screen and (max-width: 800px) {
  #intro-body {
    display: block;
  }
  #intro-text {
    width: 100%;
  }
  #intro-image {
    width: 100%;
    text-align: center;
    padding-left: 2em;
  }
  #intro-image img {
    width: 200px;
    position: static;
    margin-top: 1.5em;
  }
  #about-text {
    width: 100%;
  }
  #about-stripes {
    display: none;
  }
  #romke, #header-body, #buttons, #intro-body, #about-body {
    padding-left: 2em;
    padding-right: 2em;
  }
  #buttons div {
    text-align: center !important;
  }
}
@media only screen and (max-width: 600px) {
  h1 {
    font-size: 3em;
  }
  h2 {
    font-size: 1.5em;
  }
  .download.large {
    font-size: 1.3em;
  }
  #header-body p { 
    font-size: 1em;
  }
}
@media only screen and (max-width: 450px) {
  #small-download-buttons-buttons {
    display: grid; 
    grid-template-columns: repeat(1, 1fr);
  }
}
@media only screen and (max-width: 400px) {
  h1 {
    font-size: 2em;
  }
  h2 {
    font-size: 1.3em;
  }
  .download.large {
    font-size: 1em;
  }
  #header-body p { 
    font-size: 1em;
  }
  #intro-image img {
    width: 70%;
  }
  #romke, #header-body, #buttons, #intro-body, #about-body {
    padding-left: 1em;
    padding-right: 1em;
  }
  .download.small {
    padding-left: .5em;
  }
  #intro-image {
    padding-left: 1em;
  }
}