#container {
  display: flex;
  flex-wrap: wrap;
  max-height: 80vh;
  max-width: 60vw;
  justify-content: center;
  align-items: center;
}

.card {
  background-color: transparent;
  border-style: none;
  margin: 1em;
  width: 8vw;
  height: 8vh;
  perspective: 1000px;
  border-radius: 1em;
  transition: ease;
  transition-duration: 0.1s;
  z-index: 3;
}

.card-inner {
  border-radius: 1em;
  transition: ease;
  transition-duration: 0.8s;
  transition-property: transform;
}

.lives {
  pointer-events: none;
  position: absolute;
  top: 4%;
  left: 30%;
}

.life {
  transition: ease;
  transition-duration: 0.3s;
  transition-property: transform;
  float: left;
  margin: 0.3em;
}

.bi {
  transform: scale(1.5);
}

.bi-star {
  color: red !important;
}

.bi-star-fill {
  color: yellow !important;
}

.scale {
  transform: scale(3);
}

.card-inner.flip {
  transform: rotateY(180deg);
  -webkit-transform-style: preserve-3d;
  transform-style: preserve-3d;
}

.front>img,
.back>img {
  border-radius: 1em;
  height: 8vh;
  width: 8vw;
  box-shadow: 0.3em 0.3em 0.3em rgba(70, 70, 70, 0.3);
  -webkit-backface-visibility: hidden;
  /* Safari */
  backface-visibility: hidden;
}

.card:hover {
  cursor: pointer;
  transform: scale(110%);
}

.disabled {
  pointer-events: none !important;
}

.front>img:hover {
  opacity: 0.9;
}

.front.prev {
  filter: hue-rotate(50deg);
}

.front,
.back {
  cursor: pointer;
  border-radius: 1em;
  position: absolute;
  width: 100%;
  height: 100%;
  box-shadow: 0.3em 0.3em 0.3em rgba(70, 70, 70, 0.3);
  -webkit-backface-visibility: hidden;
  /* Safari */
  backface-visibility: hidden;
}


.hide {
  display: none !important;
}

.front {
  background-color: var(--lblue-1);
  color: black;
}

.back {
  background-color: var(--lblue-1);
  color: white;
  text-align: center;
  transform: rotateY(180deg);
  height: 8vh;
  width: 8vw;
  display: table;
  transition: ease;
  transition-duration: 0.8s;
}

.card-text {
  display: table-cell;
  vertical-align: middle;
  font-size: 1.75em;
  font-weight: 900;
}

.bg {
  position: absolute;
  z-index: 1;
  top: 0;
  left: 0;
  overflow: hidden;
  max-height: 100%;
}

.bg-img {
  height: 100%;
  width: 100%;

}

.memory-frame {
  overflow: hidden;
  min-height: 50vh;
  max-height: 50vh;
}

.native {
  background: rgb(146, 193, 255);
  color: white;
  text-shadow: 1px 1px black;
}

.foreign {
  background: rgb(255, 160, 154);
  color: white;
  text-shadow: 1px 1px black;
}

.invisible {
  visibility: hidden;
}

.main-menu {
  position: absolute;
  bottom: 1%;
  left: 1%;
  z-index: 50;
  overflow: hidden;
}

.main-menu-title {
  position: fixed;
  top: 15%;
  left: 2%;
  font-size: 5em;
  font-family: JobberWackyNF;
  color: red;
  text-shadow: 0.1em 0.1em 0.1em black;
  pointer-events: none;

  transition: ease-in-out;
  transition-duration: 0.3s;
}

.info {
  position: fixed;
  right: 5%;
  top: 20%;
  max-width: 30vw;
}

.translate-y {
  transform: translateY(100%);
}

.floater {
  float: left;
}

.floating {
  animation-name: floating;
  animation-duration: 2s;
  animation-iteration-count: infinite;
  animation-timing-function: ease-in-out;
}

@keyframes floating {
  0% {
    transform: translate(0, 0px);
  }

  50% {
    transform: translate(0, 5px);
  }

  100% {
    transform: translate(0, -0px);
  }
}

.floating:nth-child(2) {
  animation-delay: 0.1s;
  animation-duration: 3s;
}

.floating:nth-child(3) {
  animation-delay: 0.2s;
  animation-duration: 4s;
}

.floating:nth-child(4) {
  animation-delay: 0.3s;
  animation-duration: 1s;
}

.floating:nth-child(5) {
  animation-delay: 0.4s;
  animation-duration: 3s;
}

.floating:nth-child(6) {
  animation-delay: 0.5s;
}

@media screen and (min-width: 900px) {
  .menu{
    width: 10vw;
  }
}

.menu-object {
  border-style: solid;
  border-color: black;
  background-color: var(--lblue-1);
  color: white;
  font-size: 1.25em;
  font-weight: bold;
  margin: 1%;
  border-radius: 1em;
  padding: 0.5em;
  transition: ease;
  transition-duration: 0.3s;
}

.memory-btn {
  display: inline-block;
  background: none;
  border: none;
  color: white;
  text-align: center;
  text-decoration: none;
  font-size: 1.25em;
  font-weight: bold;
  font-family: 'Comic Sans MS', 'Chalkboard SE', 'Comic Neue', sans-serif;
  border-radius: 1em !important;
  margin: 2%;
  padding: 0.5em;
  background-color: var(--blue-2);
  box-shadow: 0.2em 0.2em black;
  text-shadow: 0.1em 0.1em black;

  transition: ease;
  transition-duration: 0.1s;
}


.memory-btn:hover {
  background-color: #4c85b7;
  border-radius: 0.75em !important;
  transform: scale(1.02);
}

.memory-btn:active {
  background-color: #3b658a;
  transform: scale(0.9);
}

.moveup {
  transform: translateY(calc(100vh));
}

.blank_row {
  height: 2.5vh !important;
  /* overwrites any other rules */
}

.game-over {
  position: absolute;
  background-color: var(--lblue-1);
  z-index: 60;
  border-radius: 1em;
  min-height: 45vh;
  min-width: 40vw;
  transform: translate(25%, 5%);
  border: solid;
  box-shadow: 0.5em 0.5em 0.5em;
}

.game-over-table {
  position: absolute;
  table-layout: fixed;
  color: black;
  top: 5%;
  left: 3%;
  text-align: center;
}

.game-over-title {
  color: red;
  font-size: 4em;
  font-family: JobberWackyNF;
  text-shadow: 0.1em 0.1em black;
  text-align: center;
  display: inline-block;
  position: relative;
  left: 10vw;
}

.game-over-td {
  font-family: JobberWackyNF;
  text-align: left;
  width: 50%;
  font-size: 1.70em;
  text-shadow: 0.1em 0.1em white;
}

.game-over-difficulty {
  font-family: JobberWackyNF;
  position: absolute;
  font-size: 2.15em;
  color: white;
  top: 25%;
  left: 2%;
  border-style: solid;
  padding: 0.2em;
  border-radius: 0.5em;
  border-color: darkslategray;
  text-shadow: 0.1em 0.1em black;
}

.game-over-highscore {
  position: absolute;
  right: 1%;
  top: 25%;
  color: white;
  border-style: solid;
  padding: 0.3em;
  border-radius: 0.5em;
  border-color: white;
  text-shadow: 0.1em 0.1em black;
  box-shadow: 0.1em 0.1em black;
  font-family: JobberWackyNF;
}

.game-over-buttons {
  width: 80%;
  position: absolute;
  bottom: 5%;
  left: 20%
}

.highscore-table {
  table-layout: fixed;
  font-size: 1.5em;
  text-align: center;
}

.highscore-title {
  font-size: 2em;
}

.highscore-th {
  margin-right: 0.1em;
}

.correct {
  background: rgb(80, 250, 0);
  color: white;
  transition-duration: 0.2s;
  transition-property: all;
}

.tries {
  color: black;
  font-size: 1.5em;
  font-weight: bolder;
  text-align: center;
  margin-left: 25%;
}

@keyframes firework {
  0% {
    transform: translate(var(--x), var(--initialY));
    width: var(--initialSize);
    opacity: 1;
  }

  50% {
    width: 3vmin;
    opacity: 1;
  }

  100% {
    width: var(--finalSize);
    opacity: 0;
  }
}

/* @keyframes fireworkPseudo {
  0% { transform: translate(-50%, -50%); width: var(--initialSize); opacity: 1; }
  50% { width: 0.5vmin; opacity: 1; }
  100% { width: var(--finalSize); opacity: 0; }
}
 */
.firework,
.firework::before,
.firework::after {
  --initialSize: 3vmin;
  --finalSize: 50vmin;
  --particleSize: 0.5vmin;
  --color1: yellow;
  --color2: khaki;
  --color3: white;
  --color4: lime;
  --color5: gold;
  --color6: mediumseagreen;
  --y: -30vmin;
  --x: -50%;
  --initialY: 0;
  content: "";
  animation: firework 2s infinite;
  position: absolute;
  z-index: 100;
  overflow: hidden;
  pointer-events: none;
  top: 50%;
  left: 50%;
  transform: translate(-50%, var(--y));
  width: var(--initialSize);
  aspect-ratio: 1;
  background:
    /*
    radial-gradient(circle, var(--color1) var(--particleSize), #0000 0) 0% 0%,
    radial-gradient(circle, var(--color1) var(--particleSize), #0000 0) 100% 0%,
    radial-gradient(circle, var(--color1) var(--particleSize), #0000 0) 100% 100%,
    radial-gradient(circle, var(--color1) var(--particleSize), #0000 0) 0% 100%,
    */

    radial-gradient(circle, var(--color1) var(--particleSize), #0000 0) 50% 0%,
    radial-gradient(circle, var(--color2) var(--particleSize), #0000 0) 100% 50%,
    radial-gradient(circle, var(--color3) var(--particleSize), #0000 0) 50% 100%,
    radial-gradient(circle, var(--color4) var(--particleSize), #0000 0) 0% 50%,

    /* bottom right */
    radial-gradient(circle, var(--color5) var(--particleSize), #0000 0) 80% 90%,
    radial-gradient(circle, var(--color6) var(--particleSize), #0000 0) 95% 90%,
    radial-gradient(circle, var(--color1) var(--particleSize), #0000 0) 90% 70%,
    radial-gradient(circle, var(--color2) var(--particleSize), #0000 0) 100% 60%,
    radial-gradient(circle, var(--color3) var(--particleSize), #0000 0) 55% 80%,
    radial-gradient(circle, var(--color4) var(--particleSize), #0000 0) 70% 77%,

    /* bottom left */
    radial-gradient(circle, var(--color5) var(--particleSize), #0000 0) 22% 90%,
    radial-gradient(circle, var(--color6) var(--particleSize), #0000 0) 45% 90%,
    radial-gradient(circle, var(--color1) var(--particleSize), #0000 0) 33% 70%,
    radial-gradient(circle, var(--color2) var(--particleSize), #0000 0) 10% 60%,
    radial-gradient(circle, var(--color3) var(--particleSize), #0000 0) 31% 80%,
    radial-gradient(circle, var(--color4) var(--particleSize), #0000 0) 28% 77%,
    radial-gradient(circle, var(--color5) var(--particleSize), #0000 0) 13% 72%,

    /* top left */
    radial-gradient(circle, var(--color6) var(--particleSize), #0000 0) 80% 10%,
    radial-gradient(circle, var(--color1) var(--particleSize), #0000 0) 95% 14%,
    radial-gradient(circle, var(--color2) var(--particleSize), #0000 0) 90% 23%,
    radial-gradient(circle, var(--color3) var(--particleSize), #0000 0) 100% 43%,
    radial-gradient(circle, var(--color4) var(--particleSize), #0000 0) 85% 27%,
    radial-gradient(circle, var(--color5) var(--particleSize), #0000 0) 77% 37%,
    radial-gradient(circle, var(--color6) var(--particleSize), #0000 0) 60% 7%,

    /* top right */
    radial-gradient(circle, var(--color1) var(--particleSize), #0000 0) 22% 14%,
    radial-gradient(circle, var(--color1) var(--particleSize), #0000 0) 45% 20%,
    radial-gradient(circle, var(--color1) var(--particleSize), #0000 0) 33% 34%,
    radial-gradient(circle, var(--color1) var(--particleSize), #0000 0) 10% 29%,
    radial-gradient(circle, var(--color1) var(--particleSize), #0000 0) 31% 37%,
    radial-gradient(circle, var(--color1) var(--particleSize), #0000 0) 28% 7%,
    radial-gradient(circle, var(--color1) var(--particleSize), #0000 0) 13% 42%;
  background-size: var(--initialSize) var(--initialSize);
  background-repeat: no-repeat;
}

.firework::before {
  --x: -50%;
  --y: -50%;
  --initialY: -50%;
  /*   transform: translate(-20vmin, -2vmin) rotate(40deg) scale(1.3) rotateY(40deg); */
  transform: translate(-50%, -50%) rotate(40deg) scale(1.3) rotateY(40deg);
  /*   animation: fireworkPseudo 2s infinite; */
}

.firework::after {
  --x: -50%;
  --y: -50%;
  --initialY: -50%;
  /*   transform: translate(44vmin, -50%) rotate(170deg) scale(1.15) rotateY(-30deg); */
  transform: translate(-50%, -50%) rotate(170deg) scale(1.15) rotateY(-30deg);
  /*   animation: fireworkPseudo 2s infinite; */
}

.firework:nth-child(2) {
  --x: 30vmin;
}

.firework:nth-child(2),
.firework:nth-child(2)::before,
.firework:nth-child(2)::after {
  --color1: pink;
  --color2: violet;
  --color3: fuchsia;
  --color4: orchid;
  --color5: plum;
  --color6: lavender;
  --finalSize: 40vmin;
  left: 30%;
  top: 60%;
  animation-delay: -0.25s;
}

.firework:nth-child(3) {
  --x: -30vmin;
  --y: -20vmin;
}

.firework:nth-child(3),
.firework:nth-child(3)::before,
.firework:nth-child(3)::after {
  --color1: cyan;
  --color2: lightcyan;
  --color3: lightblue;
  --color4: PaleTurquoise;
  --color5: SkyBlue;
  --color6: lavender;
  --finalSize: 35vmin;
  left: 10%;
  top: 60%;
  animation-delay: -0.4s;
}

.firework:nth-child(4) {
  --x: -60vmin;
  --y: -25vmin;
}

.firework:nth-child(4),
.firework:nth-child(4)::before,
.firework:nth-child(4)::after {
  --color1: rgb(0, 255, 76);
  --color2: rgb(224, 255, 230);
  --color3: rgb(173, 230, 187);
  --color4: rgb(191, 238, 175);
  --color5: rgb(180, 235, 135);
  --color6: rgb(230, 239, 250);
  --finalSize: 35vmin;
  left: 50%;
  top: 30%;
  animation-delay: -0.65s;
}

.firework:nth-child(5) {
  --x: 60vmin;
  --y: -15vmin;
}

.firework:nth-child(5),
.firework:nth-child(5)::before,
.firework:nth-child(5)::after {
  --color1: rgb(255, 0, 0);
  --color2: rgb(255, 224, 224);
  --color3: rgb(230, 173, 173);
  --color4: rgb(238, 178, 175);
  --color5: rgb(235, 135, 135);
  --color6: rgb(230, 239, 250);
  --finalSize: 35vmin;
  left: 40%;
  top: 30%;
  animation-delay: -0.7s;
}

.mobile-note {
  display: none;
}

@media screen and (orientation:portrait) {
  .memory-frame {
    display: none;
  }

  .mobile-note {
    display: flex;
    flex-direction: column;
    font-weight: bold;
    font-size: 1.5em;
    text-align: center;
  }

  .bi-phone {
    margin-top: 1em;
    font-size: 4em;
    animation: rot 3s ease-in-out;
    animation-iteration-count: infinite;
    -webkit-animation: rot 3s ease-in-out;
    -webkit-animation-iteration-count: infinite;
  }

  .theme-lb.modal-content{
    width: 100vw !important;
    height: 100vh !important;
  }
}

@keyframes rot {
  from {
    transform: rotate(0);
  }
  30%{
    transform: rotate(0);
  }
  50% {
    transform: rotate(90deg);
  }
  70% {
    transform: rotate(90deg);
  }
  to {
    transform: rotate(0);
  }
}

@media screen and (orientation:landscape) and (min-device-width: 810px){
  .memory-frame {
    display: block;
    width: 100vw;
    height: 100vh;
    max-height: 100vh;
  }

  .mobile-note {
    display: none;
  }

  .theme-lb.modal-content {
    height: 90vh !important;
    width: 100vw !important;
  }

  #container {
    max-width: 100vw;
    max-height: 100vh;
    font-size: 0.75em;
  }

  .card {
    width: 10vw !important;
    height: 15vh !important;
  }

  .front>img,
  .back>img {
    width: 10vw;
    height: 15vh;
  }

  .back{
    width: 10vw;
    height: 15vh;
  }

  #controller{
    position: fixed;
    top: 60%;
  }

  .game-over{
    width: 90vw;
    position: fixed;
    top: 20vh;
    left: 6vw;
    transform: none;
  }

  #game-over-btn{
    position: relative;
    left: -30%;
  }

  #exit-btn{
    position: relative;
    left: 10%;
  }

  .exercise-finish-modal {
    position: absolute !important;
    max-height: 80vh !important;
    left: -16vw !important;
    width: 97vw !important;
    top: -5vh !important;
    overflow-y: scroll;
  }

  .menu{
    width: 40%;
  }

  .info {
    top: 20vh;
    height: 60vh;
  }
}