body {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  margin: 0;
  font-family: Verdana, Geneva, Tahoma, sans-serif;
  color: #ffffff;
  background-color: hsl(227, 39%, 17%);
  text-align: center;
}

body > * {
  max-width: 1000px;
}

h1 {
  font-size: 5em;
  color: #3a84f5;
  vertical-align: middle;
}

h2 {
  color: #f4f4f4;
}

img {
  vertical-align: middle;
}

a {
  color: #47adfa;
}

a:hover {
  background-color: #47adfa;
  box-shadow: 0 0 10px rgba(71, 173, 250, 0.5);
}

.banner {
  background-color: #3ea8f981;
  border-radius: 15px;
  margin: 10px;
}

::selection,
::-moz-selection {
  background: #47adfa;
  color: black;
}

.link-button {
  font-weight: bold;
  color: #f4f4f4;
  background: linear-gradient(45deg, #47adfa, #4e76f1);
}

.link-button:hover {
  font-weight: bold;
  color: #f4f4f4;
  background: linear-gradient(45deg, #4e76f1, #47adfa);
  box-shadow: 0 0 10px rgba(71, 173, 250, 0.5);
}

.demo-video {
  width: 100%;
  height: auto;
  border-radius: 15px;
}