body {
  font-family: "Lato", sans-serif;
  font-size: 16px;
  background: #ddd;
  color: #222;
  margin: 0;
}

h1, h2 {
  font-family: "Aller", sans-serif;
}

header {
  text-align: center;
  background: #222;
  color: white;
  border-bottom: 5px solid #63d297;
  border-top: 1px solid transparent;
  margin-bottom: 20px;
  padding: 0;
}

header h1 {
  margin: 20px;
  font-weight: 200;
}

main {
  max-width: 800px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  grid-gap: 20px;
  margin-bottom: 10em;
}

section {
  height: 400px;
  padding: 10px;
  vertical-align: middle;
}

section#color {
  background-color: white;
  box-shadow: -5px 5px 0 #63d297;
  color: #222;
}

section#color,
section#color h2,
section#color p.second {
  transition: background-color 1s, color 1s, box-shadow 1s;
}

section#color h2,
section#color p.second {
  text-align: center;
  color: #080;
}

section#color p.second {
  font-size: 20px;
}

section#color.clicked {
  background-color: #222;
  color: white;
  box-shadow: -5px 5px dodgerblue;
}

section#color.clicked h2,
section#color.clicked p.second {
  color: #acf;
}

section#font-size {
  text-align: center;
  display: flex;
  flex-direction: column;
  justify-content: center;
  color: #222;
  font-family: "Aller", sans-serif;
  font-weight: bold;
}

section#font-size p {
  transition: font-size 1s;
  font-size: 25px;
}

section#font-size.clicked p.makebig {
  font-size: 40px;
}

section#font-size.clicked p.makesmall {
  font-size: 10px;
}

section#transform {
  text-align: center;
  display: flex;
  align-items: center;
  justify-content: center;
}

section#transform img {
  width: 300px;
  height: 200px;
  transition: transform 1s;
}

section#transform.clicked img {
  transform: rotate(90deg) scale(0.5, 2);
}

section#height-width {
  display: flex;
  justify-content: center;
}

section#height-width p {
  background: #fff;
  box-shadow: -5px 5px 0 #63d297;
  padding: 10px;
  width: 200px;
  height: 350px;
  transition: height 1s .25s, width 1s;
}

section#height-width.clicked p {
  width: 350px;
  height: 175px;
}

footer {
  text-align: center;
  position: fixed;
  bottom: 0;
  width: 100%;
  padding: 20px;
  background: #ccc;
}

footer input[type=button] {
  font-size: 25px;
}