body {
  color: white;
  /* background-color: #06b; */
  background: radial-gradient(#06b, #000);
  font-family: 'Rubik', sans-serif;
  background-repeat: no-repeat;
  background-attachment: fixed;
}

h1 {
  text-align: center;
  margin: 20px 0 0 0;
  padding: 4px 4px 10px 10px;
  background-color: rgba(0, 0, 0, 0.5);
  border: 5px solid rgba(0, 0, 255, 0.3);
}

.center {
  display: block;
  margin: 0 auto;
  width: 650;
}

p, ul {
  padding: 5px 5em 5px 5em;
}

ul {
  margin-left: 2em;
}

p::first-letter {
  font-size: 150%;
}

button {
  -webkit-transition-duration: 0.4s; /* Safari */
  transition-duration: 0.4s;
  color: black;
  background-color: white;
  padding: 5px;
  box-shadow: 0 4px 8px 0 rgba(255, 255, 255, 0.2), 0 6px 20px 0 rgba(255, 255, 0255, 0.19);
  margin: 10px 0px 20px 6em;
  cursor: pointer;
}

button:hover {
  box-shadow: 0 4px 8px 0 rgba(255, 255, 0, 1), 0 6px 20px 0 rgba(255, 255, 0, 0.19);
}

a {
  color: inherit;
  text-decoration: none;
  padding-right: 5em;
  padding-left: 5em;
  margin-bottom: 5em;
}

a:hover {
  text-decoration: underline;
}

::-moz-selection {
  background-color: white; color: black;
}

::selection {
  background-color: white; color: black;
}