html, body {
  width: 100vw;
  height: 100vh;
  margin: 0;
  padding: 0;
  overflow: hidden;
}
body {
  background: #746958 url(../images/wood.svg) center/cover no-repeat;
  font-family: helvetica, arial, sans-serif;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
  -webkit-user-select: none;
  -webkit-tap-highlight-color: transparent;
  -webkit-text-size-adjust: 100%;
  -webkit-touch-callout: none;
}

header {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 8vh;
  background: #928776;
  border-bottom: 2px #222 solid;
}
header h1 { /* Score */
  -webkit-box-sizing: border-box;
  box-sizing: border-box;
  display: inline-block;
  height: 100%;
  margin: 0 5px;
  color: #fff;
  font-size: 6vh;
  line-height: 8vh;
}
header div { /* Lives */
  -webkit-box-sizing: border-box;
  box-sizing: border-box;
  position: absolute;
  top: 0;
  right: 5px;
  height: 100%;
}
header div img { /* Hearts */
  width: 5vh;
  height: 5vh;
  margin: 1.5vh 0;
}

main img:first-child { /* Cat */
  position: absolute;
  width: 75px;
  height: 75px;
}
main img:not(:first-child) { /* Mice */
  position: absolute;
  width: 40px;
  height: 25px;
}

body>div:not(:last-of-type) { /* Popups */
  -webkit-box-sizing: border-box;
  box-sizing: border-box;
  position: absolute;
  left: calc(50% - 40vmin);
  width: 80vmin;
  padding: 4vmin;
  background: #fff;
  border: 1.5vmin #222 solid;
  border-radius: 5vmin;
  font-weight: bold;
  text-align: center;
  text-transform: uppercase;
}
body>div:nth-of-type(1) {
  top: calc(50% - 35vmin);
  height: 70vmin;
}
body>div:nth-of-type(2) {
  top: calc(50% - 32vmin);
  height: 64vmin;
}
body>div:nth-of-type(3) {
  top: calc(50% - 29vmin);
  height: 58vmin;
}
body>div:nth-of-type(4) {
  top: calc(50% - 24vmin);
  height: 48vmin;
}
body>div div:nth-child(1) {
  margin-bottom: 4vmin;
  font-size: 8vmin;
}
body>div:nth-of-type(2) div:nth-child(1),
body>div:nth-of-type(3) div:nth-child(1) {
  margin-bottom: 2vmin;
}
body>div:nth-of-type(4) div:nth-child(1) {
  margin-bottom: 1vmin;
}
body>div:nth-of-type(1) div:not(:nth-child(1)),
body>div:nth-of-type(2) div:not(:nth-child(1)),
body>div:nth-of-type(3) div:nth-child(3),
body>div:nth-of-type(4) div:nth-child(4) {
  margin: 2vmin 0;
  padding: 2vmin;
  border: 1vmin #222 solid;
  font-size: 5vmin;
}
body>div:nth-of-type(1) div:not(:nth-child(1)):active,
body>div:nth-of-type(2) div:not(:nth-child(1)):active,
body>div:nth-of-type(3) div:nth-child(3):active,
body>div:nth-of-type(4) div:nth-child(4):active {
  background: #222;
  color: #fff;
}
body>div:nth-of-type(1) div:nth-child(2) {
  padding: 5vmin 2vmin;
  font-size: 15vmin;
}
body>div:nth-of-type(3) div:nth-child(2) {
  font-size: 4vmin;
  text-align: justify;
  text-align-last: center;
}
body>div:nth-of-type(4) div:nth-child(2) {
  font-size: 4vmin;
}
body>div:nth-of-type(4) div:nth-child(3) {
  font-size: 5vmin;
}

body>div:last-of-type {
  display: none;
  width: 100%;
  height: 100%;
  padding: 30vh 0;
  color: #fff;
  font-size: 20vh;
  font-weight: bold;
  line-height: 20vh;
  text-align: center;
  text-transform: uppercase;
}
@media screen and (orientation: landscape) and (max-height: 450px) {
  body>* { display: none }
  body>div:last-of-type { display: block }
}