* {
    line-height: 1.5;
    letter-spacing: 0.05em;
    font-family: Arial;
}

main {
  background: url("background.jpg") no-repeat center center fixed;
  background-size: cover;
}

body {
  background-color: black;
}

h1 {
  font-size: 28px;
  color: white;
}

h2 {
  font-size: 26px;
}

h2.firstMainHeader.lastHeader {
  color: white;
}

h3 {
  font-size: 24px;
}

h4 {
  font-size: 22px;
}

h1, h2, h3, h4 {
  text-align: center;
  font-weight: bold;
}

h2, h3, h4 {
    background-color: white;
}

p {
  font-size: 20px;
  text-align: center;
  color: white;
  padding-left: 50px;
  padding-right: 50px;
}

a {
  display: block;
  color: lightblue;
  transition: color 0.5s ease;
}

a.inlineLink {
  display: inline;
  color: lightblue;
  transition: color 0.5s ease;
}

p, a {
    font-size: 20px;
    text-align: center;
}

a:hover {
  color: blue;
}

video {
  display: block;
  margin: 0 auto;
  padding-bottom: 5px;
}

video, iframe.youtubeLandscape {
  width: 720px;
  height: 480px;
}

video, iframe.youtubeVertical {
  width: 480px;
  height: 720px;
}

iframe {
    display: block;
    margin: 0 auto;
    padding-bottom: 5px;
}

img.trello2 {
    display: block;
    margin: 0 auto;
    height: 450px;
    width: 500px;
}

img.trello4 {
    display: block;
    margin: 0 auto;
    height: 400px;
    width: 500px;
}

img.verticalImage {
    display: block;
    height: 500px;
    width: 300px;
}

img {
    display: block;
    height: 250px;
    width: 500px;
}

table {
    margin-left: auto;
    margin-right: auto;
}

label {
    color: white;
}

form {
    display: block;
    text-align: center;
    margin: 0 auto;
}

input {
    width: 250px;
}

button {
    width: 75px;
}

#certificate {
    margin-left: auto;
    margin-right: auto;
    height: 480px;
    width: 720px;
}