html,
body{
  height: 100%;
}



.memory-card-game{
  position: relative;
  display: flex;
  flex-wrap: wrap;
  height: 100%;
  background: #0c0079;
}



.timeline{
  position: absolute;
  z-index: 1;
  left: 0;
  top: 0;
  width: 100%;
  height: 0.8rem;
  pointer-events: none;
}

.timeline > div{
  height: 100%;
  background: #d12626;
  opacity: 0.9;
  box-shadow: 0 1px 5px rgba(0, 0, 0, 0.3);
  transform: translate3d(-100%, 0, 0);
  transition: transform 0.2s ease;
}



.card{
  position: relative;
  flex: 0 0 25%;
  overflow: hidden;
  background: #73b2fa;
  border: solid 2px #0c0079;
  cursor: pointer;
}

.card::before{
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  width: 101%;
  height: 101%;
  background: #0a2e58;
  opacity: 0;
  transform: translate3d(0, 0, 0);
  transition: opacity 0.3s ease;
}

.card.active::before,
.card.hidden::before{
  opacity: 1;
}

.card img{
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  bottom: 0;
  display: block;
  max-width: 100%;
  max-height: 100%;
  padding: 0.5rem;
  margin: auto;
  transition: opacity, transform 0.3s ease;
}

.card.active img{
  opacity: 1;
  transform: scale(1) translate3d(0, 0, 0);
}

.card img,
.card.hidden img{
  opacity: 0;
  transform: scale(0) translate3d(0, 0, 0);  
}



#pannel[data-succeed=true] .introduction,
#pannel[data-succeed=true] .failed{
  display: none;
}

#pannel[data-succeed=true] .succeed{
  display: block;
}

#pannel[data-succeed=false] .introduction,
#pannel[data-succeed=false] .succeed{
  display: none;
}

#pannel[data-succeed=false] .failed{
  display: block;
}

#pannel:not([data-succeed]) .introduction{
  display: block;
}

#pannel:not([data-succeed]) .succeed,
#pannel:not([data-succeed]) .failed{
  display: none;
}

.btn.btn-primary {
  color: rgba(255,255,255,.9);
  background: #73b2fa;
  border-color: transparent;
}

.btn.btn-primary:hover {
  color: rgba(255,255,255,.9);
  background: #00244d;
  border-color: transparent;
}

.overlay-body, .bc-dark {
  background-color: #0a2e58 !important;
}

.overlay {
  background-color: rgba(56,56,56,0.4);	
}