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 {
  margin: 0 10%;
  display: grid;
  grid-template-columns: 1fr 1fr 1fr 1fr;
  grid-gap: 20px;
  height: auto;
}

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

.button-group {
  display: grid;
  height: 7em;
}

.radios {
  vertical-align: center;
}

input[type="button"] {
  align-self: center;
  grid-column: 5/6;
  width: 10em;
  height: 5em;
  font-size: 16px;
}

#demonstration {
  grid-column: 1/-1;
  margin: 0 auto;
  padding: 0;
}

#demonstration p {
  box-shadow: -5px 5px 0 #63d297;
  background: #eee;
  padding: 10px;
  width: 700px;
}

#demonstration p {
  transition-property: all;
}
#demonstration.property-1.clicked p {
  color: white;
  background: #222;
}
#demonstration.property-2.clicked p {
  width: 400px;
}
#demonstration.property-3.clicked p {
  font-size: 20px;
}
#demonstration.property-4.clicked p {
  box-shadow: 0 0 10px 5px magenta;
}

#demonstration.duration-1 p {
  transition-duration: 0s;
}
#demonstration.duration-2 p {
  transition-duration: .5s;
}
#demonstration.duration-3 p {
  transition-duration: 1s;
}
#demonstration.duration-4 p {
  transition-duration: 2s;
}

#demonstration.timing-1 p {
  transition-timing-function: linear;
}
#demonstration.timing-2 p {
  transition-timing-function: ease;
}
#demonstration.timing-3 p {
  transition-timing-function: cubic-bezier(.5,1,1,0);
}
#demonstration.timing-4 p {
  transition-timing-function: steps(6, end);
}

#demonstration.delay-1 p {
  transition-delay: 0s;
}
#demonstration.delay-2 p {
  transition-delay: .5s;
}
#demonstration.delay-3 p {
  transition-delay: 1s;
}
#demonstration.delay-4 p {
  transition-delay: 2s;
}