html,
body {
  height: 100%;
  overflow: hidden;
}

body {
  margin: 0;
  font: 16px sans-serif;
}

.wrap {
  display: flex;
  flex-direction: column;
  height: 100%;
}

.game-wrapper {
  flex: 1;
  display: flex;
  justify-content: center;
  align-items: center;
  background: #222;
}
.game {
  width: 800px;
  height: 600px;
  background: url(../Images/background-blue.png);
  animation: scroll-background 5s linear infinite;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
  position: relative;
}

@keyframes scroll-background {
  from {
    background-position-y: 0px;
  }
  to {
    background-position-y: 256px;
  }
}

.game .enemy {
  position: absolute;
  margin-left: -20px;
  margin-top: -18px;
  width: 40px;
}

.game .explosion {
  position: absolute;
  margin-left: -20px;
  margin-top: -18px;
  width: 40px;
}

.game .present {
  position: absolute;
  margin-left: -11px;
  width: 30px;
}

.game .player {
  position: absolute;
  margin-left: -20px;
  width: 40px;
}

.game .laser {
  position: absolute;
  margin-left: -2.5px;
  height: 30px;
}

.game .enemy-laser {
  position: absolute;
  margin-left: -2.5px;
  height: 25px;
  width: 25px;
}

.congratulations {
  display: none;
  position: absolute;
  background: #c7a526;
  color: white;
  padding: 20px 50px;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
  border-radius: 10px;
  text-align: center;
  animation: pop-in 1s;
  left: 30%;
  top: 20%;
  z-index: 999;
}

#next-level img {
  height: 100px;
  width: 100px;
  display: block;
  margin-left: auto;
  margin-right: auto;
}

#restart img {
  height: 100px;
  width: 100px;
  display: block;
  margin-left: auto;
  margin-right: auto;
}

.game-over {
  display: none;
  position: absolute;
  background: white;
  color: #6b1818;
  padding: 20px 50px;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
  border-radius: 10px;
  text-align: center;
  animation: pop-in 1s;
  left: 30%;
  top: 5%;
  z-index: 999;
}
.game-over img {
  border: none;
  height: 260px;
  width: 200px;
  display: block;
  margin-left: auto;
  margin-right: auto;
}
.btn {
  border: 2px solid #36bbf5;
  border-radius: 3px;
  box-shadow: 0 2px rgba(0, 0, 0, 0.15);
  background: linear-gradient(
    to bottom,
    #fff 0%,
    #fff 49%,
    #f5f5f5 50%,
    #eee 100%
  );
  padding: 10px 40px;
  font: 14px sans-serif;
}
@keyframes pop-in {
  0% {
    opacity: 0;
    transform: translate(0, -100px);
  }
  10% {
    opacity: 1;
  }
  50% {
    transform: translate(0, 30px);
  }
  100% {
    transform: translate(0, 0);
  }
}

.game .mute {
  height: 5px;
  margin-left: 750px;
  margin-top: 5px; /*without it player disappear*/
}
.game #mute_icon {
  height: 5px;
  margin-left: 750px;
  margin-top: -5px; /*without it player disappear*/
  display: none;
}

.game .score {
  color: rgb(0, 183, 255);
  width: 200px;
  height: 5px;
}
.game .lives {
  color: rgb(0, 183, 255);
  width: 200px;
  height: 5px;
  margin-left: 100px;
  margin-top: -5px;
}
.game .lives img,
.game .score img {
  margin-left: 20px;
  margin-top: 12px;
  margin-right: 10px;
}
.game .mute img,
.game #mute_icon img,
.game .lives img,
.game .score img {
  width: 30px;
  height: 30px;
}

#lives {
  color: red;
}

* {
  box-sizing: border-box;
}

.modal button {
  font: inherit;
  background: transparent;
  border: 1px solid #fff;
  border-radius: 5px;
  padding: 0.5rem 1rem;
  cursor: pointer;
  font-weight: bold;
  color: #fff;
  display: inline-block;
  margin: 10px;
}

.modal {
  position: fixed;
  z-index: 200;
  top: 10%;
  left: 50%;
  transform: translate(-50%, 0);
  text-align: center;
  width: 35%;
  border-radius: 8px;
  background: #6b1818;
  color: white;
  padding: 20px 50px;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
  animation-name: animatetop;
  animation-duration: 0.7s;
  z-index: 9999;
}

.modal img {
  max-width: 100%;
  border-radius: 8px;
}

@keyframes animatetop {
  from {
    top: -300px;
    opacity: 0;
  }
  to {
    top: 10%;
    opacity: 1;
  }
}
.modal h1 {
  margin: 0.5rem 0;
  font-size: 1.2rem;
}

.modal-input {
  margin: 0.5rem 0;
}

.backdrop {
  position: fixed;
  width: 100%;
  height: 100%;
  top: 0;
  left: 0;
  background: rgba(0, 0, 0, 0.7);
  z-index: 100;
}

.open {
  display: block;
}