:root {
  --height: 0;
  --primary: deeppink;
  --secondary: purple;
  --tertiary: gold;
}

body {
  font-size: 1.5em;
  font-family: open sans;
  margin: 0 auto;
  width: 60vw;
  background-color: var(--primary);
  color: #fff;

  transition: all 0.25s;
}

body.animate {
  background-color: var(--secondary);
}
header {
  position: relative;
  z-index: 10;
  padding: 1em 2em;
  background-color: var(--primary);
  border-bottom: 0.25em solid var(--secondary);
  transition: all 0.25s;
  margin: 0 -2em;
}
body.animate header {
  background-color: var(--secondary);
}
h1 {
  margin: 0;
  white-space: nowrap;
}

article {
  padding: 0 2em;
  margin: 0 -2em 2em;
  position: relative;
  z-index: 5;
  height: 20em;
  overflow: hidden;
  border-bottom: 0.25em solid var(--secondary);
}
article div {
  transition: all 0.25s 0.5s ease-in;
  transform: translateY(calc(var(--height) - 1em));
}

p {
  transition: all 0.25s ease-in;
  padding: 1em;
  background-color: rgba(0, 0, 0, 0.3);
  position: relative;
  cursor: hand;
}

p:after {
  content: 'x';
  position: absolute;
  top: -0.5em;
  right: -0.5em;

  background-color: var(--secondary);
  width: 1em;
  height: 1em;
  line-height: 1em;
  border-radius: 50%;
  text-align: center;
  padding: 0.25em;
}
p:hover:after {
  background-color: var(--tertiary);
}

body.animate p {
  transform: scale(1.1);
  background-color: rgba(0, 0, 0, 0.1);
}
footer {
}
button {
  background-color: var(--tertiary);
  border-radius: 0.25em;
  font-size: inherit;
  padding: 0.25em 0.5em;
  border: 0;
  box-shadow: 0 0 2px 5px rgba(0, 0, 0, 0.25);
  transition: 0.25s;
  margin-left: 1em;
}
button:focus {
  box-shadow: none;
  transform: scale(0.9);
}
button:nth-of-type(2) {
  opacity: 0;
  transition: all 0.25s 0.25s ease-out;
}
button:nth-of-type(2).show {
  opacity: 1;
}