button {
  display: block;
  position: relative;
  background: #fff;
  border: none;
  cursor: pointer;
  color: #000000;
  transition: all 0.25s;
  font: inherit;
  line-height: 1;
  margin: 0.5em;
  padding: 1em 2em;
  border-radius: 0.4em;
  text-transform: uppercase;
  font-size: 1.05em;
  font-weight: 600;
  letter-spacing: 0.04em;
  mix-blend-mode: screen;
  box-shadow: 0.2em 0.2em 0 0 #d62828, inset 0.2em 0.2em 0 0 #003049;
}
button:hover, button:focus {
  color: #fff;
  box-shadow: 0 0 0 0 #d62828, inset 6em 3.5em 0 0 #003049;
}

html {
  height: 100%;
  display: flex;
}

body {
  position: relative;
  margin: auto;
  font-family: "Exo 2";
  background: #003049;
  background: linear-gradient(90deg, #003049 0%, #d62828 100%);
  color: white;
  text-align: center;
}

h1 {
  margin-top: 60px;
  padding-bottom: 5px;
}

h2, h3 {
  font-weight: 500;
}

a {
  color: white;
  text-decoration: none;
}

main {
  display: flex;
  flex-direction: column;
}

img {
  border-radius: 50%;
  margin: 0.5em;
}

footer {
  padding: 2rem;
}