BODY {
  box-sizing: content-box;
  margin: 0;
  padding: 0;
  font-family: Times, serif;
  background-color: #000;
  color: #aaa;
  overflow: hidden;
}
#result {
  font-family: monospace;
}

#pairsboard {
  position: relative;
  width: 960px;
  height: 600px;
}

#pairsboard #background {
  position: absolute;
  top: 65px;
  left: 225px;
  width: calc(7 * 60px);
  height: calc(600px - 170px);
  pointer-events: none;
  background-position: center center;
  background-size: contain;
  background-repeat: no-repeat;

  opacity: 0.5;
  transition-property: opacity, width, height, top, left;
  transition-duration: 1s;
  transition-timing-function: ease-out;
}

#main.win #pairsboard #background {
  top: calc(65px - 55px);
  left: calc(225px - 215px);
  width: calc(7 * 60px + 215px * 2);
  height: calc(600px - 170px + 110px);
  opacity: 1;
}

#main.lose #pairsboard #background {
  opacity: 0.2;
}

#pairsboard .sprite {
  position: absolute;
  width: 60px;
  height: 60px;
  pointer-events: none;
  transition-property: filter, opacity;
  transition-duration: 0.2s;
}

#pairsboard .sprite.contents {
  width: 50px;
  height: 50px;
  margin-left: 5px;
  margin-top: 5px;
  background-image: url(pairs/images/sprites36.png);
  background-size: 450px 200px;
  overflow: hidden;
}

#pairsboard .sprite.open.hover.contents {
  filter: brightness(120%);
}

#pairsboard .sprite.open.hover.globe {
  filter: brightness(120%) drop-shadow(0 0 10px #fff);
}

#pairsboard .sprite.selected.globe {
  filter: brightness(110%) sepia(100%) hue-rotate(20deg) drop-shadow(0 0 20px #ffd);
}

#pairsboard .sprite.selected.hover.globe {
  filter: brightness(130%) sepia(100%) hue-rotate(20deg) drop-shadow(0 0 20px #fff);
}

#pairsboard .sprite.hidden,#pairsboard .sprite.glint.hidden {
  opacity: 0;
  pointer-events: none;
}

#main.showopen .sprite.open.contents {
  filter: brightness(120%);
}

#main.showopen .sprite.open.globe {
  filter: brightness(120%) drop-shadow(0 0 6px #fe4);
}

#pairsboard .sprite.globe {
  width: 60px;
  height: 60px;
  background-image: url(pairs/images/globe-under.png);
}

#pairsboard .sprite.glint {
  width: 60px;
  height: 60px;
  opacity: 0.6;
  background-image: url(pairs/images/globe-over.png);
  pointer-events: auto;
}

#pairsboard .sprite.shadow {
  position: absolute;
  margin-left: -20px;
  margin-top: -20px;
  width: 110px;
  height: 110px;
  background: radial-gradient(black, black, black, #0000, #0000, #0000);
}

#messages {
  position: absolute;
  width: calc(7 * 60px + 215px * 2);
  height: 30px;
  left: 0px;
  top: 560px;
  z-index: 100;
  filter: drop-shadow(0 0 5px #000);

  color: #fff;
  font-weight: bold;
  font-style: italic;
  font-size: 25px;
  text-align: center;

  opacity: 1;
  transition-property: opacity;
  transition-duration: 0.5s;
}

#messages.hidden {
  pointer-events: none;
  opacity: 0;
}

BUTTON#newgame {
  box-sizing: border-box;
  position: absolute;
  height: 35px;
  left: 10px;
  top: calc(600px - 35px - 10px);
  width: 130px;
  z-index: 200;
  padding: 0 5px 0 5px;
  opacity: 0.6;

  background-color: #fff3;
  border: 0;
  color: #fff;

  font-family: Times, serif;
  font-weight: bold;
  font-style: italic;
  font-size: 20px;
  text-align: center;
  line-height: 20px;

  transition-property: opacity;
  transition-duration: 0.3s;
  cursor: pointer;
}

BUTTON#newgame:hover {
  opacity: 1;
  background-color: #fff6;
}

#openbutton {
  position: absolute;
  width: 60px;
  height: 60px;
  top: 530px;
  left: 890px;

  background-image: url(pairs/images/showopens.png);
  opacity: 0.6;
  cursor: pointer;

  transition-property: opacity, filter;
  transition-duration: 0.3s;
}

#openbutton:hover {
  opacity: 1;
}

#helpbutton {
  position: absolute;
  width: 60px;
  height: 60px;
  top: 530px;
  left: 820px;

  background-image: url(pairs/images/helpicon.png);
  opacity: 0.6;
  cursor: pointer;

  transition-property: opacity, filter;
  transition-duration: 0.3s;
}

#helpbutton:hover {
  opacity: 1;
}

#copybutton {
  position: absolute;
  width: 60px;
  height: 60px;
  top: 530px;
  left: 750px;

  background-image: url(pairs/images/copyicon.png);
  opacity: 0.6;
  cursor: pointer;

  transition-property: opacity, filter;
  transition-duration: 0.3s;
}

#copybutton:hover {
  opacity: 1;
}

#main.showopen #openbutton {
  filter: brightness(120%) drop-shadow(0 0 6px #fe4);
}

#main.win BUTTON#newgame,#main.lose BUTTON#newgame {
  opacity: 1;
  animation: buttonpulse 3s linear infinite;
}

@keyframes buttonpulse {
  60% {
    filter: drop-shadow(0 0 10px #fff0);
    box-shadow: 0 0 10px #fff0;
    background-color: #fff3;
  }
  70% {
    filter: drop-shadow(0 0 10px #fff7);
    box-shadow: 0 0 10px #fff7;
    background-color: #fff7;
  }
  80% {
    filter: drop-shadow(0 0 10px #fff0);
    box-shadow: 0 0 10px #fff0;
    background-color: #fff3;
  }
  90% {
    filter: drop-shadow(0 0 10px #fff7);
    box-shadow: 0 0 10px #fff7;
    background-color: #fff7;
  }
  100% {
    filter: drop-shadow(0 0 10px #fff0);
    box-shadow: 0 0 10px #fff0;
    background-color: #fff3;
  }
}

/* portrait orientation */

BODY.portrait #pairsboard .sprite {
  transform: rotate(-90deg);
}

BODY.portrait BUTTON#newgame {
  transform: rotate(-90deg);
  transform-origin: 0 0;
  left: calc(960px - 35px - 5px);
  top: 595px;
}

BODY.portrait #messages {
  transform: rotate(-90deg);
  transform-origin: 0 0;
  width: 600px;
  height: 35px;
  left: 925px;
  top: 600px;

  font-size: 20px;
}

BODY.portrait #pairsboard #background {
  transform: rotate(-90deg);
  transform-origin: 0 0;

  top: calc(65px + 600px - 170px);
  left: 225px;
  height: calc(7 * 60px);
  width: calc(600px - 170px);

  background-size: cover;
  background-position: center center;
}

BODY.portrait #main.win #pairsboard #background {
  top: 600px;
  left: calc((960px - 600px) / 2);
  height: 600px;
  width: 600px;
}

BODY.portrait #openbutton {
  position: absolute;
  top: 10px;
}

BODY.portrait #helpbutton {
  position: absolute;
  top: 140px;
  left: 890px;
  transform: rotate(-90deg);
  transform-origin: 0 0;
}

BODY.portrait #copybutton {
  position: absolute;
  top: 210px;
  left: 890px;
  transform: rotate(-90deg);
  transform-origin: 0 0;
}

/*****************************************************************************************************/
/* HELP */

#help {
  color: #fff;
  padding: 20px;
  width: 800px;
}

#help H1,#help H3 {
  margin-bottom: 2px;
}