* {
  margin: 0;
  padding: 0;
  border: none;
  text-transform: uppercase;
  font-family: "Courier", sans-serif;
  box-sizing: border-box;
  color: white;
  font-weight: bold;
  font-size: 32px;
}

html,
body,
.layer {
  position: absolute;
  width: 100%;
  height: 100%;
  overflow: hidden;
  display: block;
  top: 0;
  text-align: center;
}

body {
  min-width: 1490px;
}

.back-layer {
  object-fit: cover;
}

body > .layer:not(.current) {
  display: none;
}

.wrapper {
  height: 1014px;
  width: 1050px;
  margin: auto;
  position: relative;
  background-color: rgba(0, 0, 0, 0.72);
}

.start-layer .wrapper {
  padding-top: 260px;
}

form {
  margin-top: 100px;
  text-align: center;
}

input,
button {
  height: 54px;
  border: none;
  color: white;
  font-size: 28px;
  line-height: 53px;
  display: block;
  margin: auto;
  width: 300px;
  outline: none;
}

input {
  border-bottom: 1px solid #0073ef;
  background-color: transparent;
  text-align: center;
}

button {
  background-color: #0073ef;
  margin-top: 54px;
  cursor: pointer;
}

.formation {
  width: 677px;
  height: 386px;
  position: absolute;
  top: 120px;

  animation: animate-formation 20s linear infinite alternate 6s;
}
@keyframes animate-formation {
  0% {
    transform: translate(0, 0);
  }
  25% {
    transform: translate(180px, 0);
  }
  50% {
    transform: translate(180px, 300px);
  }
  75% {
    transform: translate(0, 300px);
  }
  100% {
    transform: translate(-180px, 300px);
  }
}

.bee-ctn {
  width: 100px;
  height: 100px;
  position: absolute;
  margin: auto;
}

.bee-img {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  right: 0;
  margin: auto;
}
.current .bee-img {
  animation: bee-img-intro 5s linear forwards;
}
@keyframes bee-img-intro {
  0% {
    transform: translateY(-450px);
  }
  100% {
    transform: translateY(0);
  }
}

.player {
  position: absolute;
  width: 100px;
  height: 100px;
  bottom: 80px;
  line-height: 100px;
  text-align: center;
}

.player img {
  margin: auto;
  left: 0;
  right: 0;
  top: 0;
  bottom: 0;
  display: block;
  position: absolute;
}
.current .player {
  animation: player-intro 2s linear forwards;
}
@keyframes player-intro {
  0% {
    transform: translateY(150px);
  }
  100% {
    transform: translateY(0);
  }
}

.bullet,
.player-bullet,
.player-bullet-fired,
.green-alien-bullet-fired,
.purple-alien-bullet-fired,
.red-alien-bullet-fired,
.yellow-alien-bullet-fired {
  width: 3px;
  height: 12px;
  position: absolute;
  background-color: orange;
  z-index: 1;
}
.player-bullet-fired {
  animation: player-bullet-fired-animate 5s linear forwards;
}
.green-alien-bullet-fired {
  animation: alien-bullet-fired-animate 5s linear forwards;
  background-color: #019696;
}
.purple-alien-bullet-fired {
  animation: alien-bullet-fired-animate 4s linear forwards;
  background-color: #ff00dd;
}
.red-alien-bullet-fired {
  animation: alien-bullet-fired-animate 3s linear forwards;
  background-color: #ff0100;
}
.yellow-alien-bullet-fired {
  animation: alien-bullet-fired-animate 2s linear forwards;
  background-color: #ffff00;
}
@keyframes player-bullet-fired-animate {
  0% {
    transform: translateY(0);
  }
  100% {
    transform: translateY(-1000px);
  }
}
@keyframes alien-bullet-fired-animate {
  0% {
    transform: translateY(0);
  }
  100% {
    transform: translateY(1500px);
  }
}
.player-bullet {
  visibility: hidden;
}
.player-bullet {
  left: 49px;
  top: 23px;
  z-index: 1;
  animation: player-bullet-intro 2.5s linear forwards;
}
@keyframes player-bullet-intro {
  0% {
    visibility: hidden;
  }
  99% {
    visibility: hidden;
  }
  100% {
    visibility: visible;
  }
}

.ui-layer {
  height: 100%;
  width: 220px;
}

.info-container {
  height: 100%;
  display: flex;
  background-color: rgba(0, 0, 0, 0.72);
  flex-direction: column;
  padding-top: 60px 0;
  justify-content: space-around;
}

.info-box {
  flex: 0 0 100px;
}

.info-box > span {
  height: 50px;
  display: block;
  color: white;
  line-height: 50px;
}

.info-box > span:last-child {
  color: orange;
}

.life {
  margin-right: 12px;
}

.end-layer {
  background-color: rgba(0, 0, 0, 0.8);
}

.rank-list {
  min-height: 640px;
}

.rank-list table {
  margin: 100px auto;
  width: 700px;
}

th {
  color: orange;
}

tr {
  line-height: 54px;
}

td {
  color: inherit;
}

.explosion {
  position: absolute;
  height: 60px;
  width: 60px;
  background: url("../images/explosion_1.png");
  background-size: contain;
  animation: animate-explosion 1s linear forwards;
}
@keyframes animate-explosion {
  0% {
    visibility: hidden;
  }
  5% {
    visibility: visible;
    background: url("../images/explosion_1.png");
    background-size: contain;
  }
  25% {
    background: url("../images/explosion_2.png");
    background-size: contain;
  }
  50% {
    background: url("../images/explosion_3.png");
    background-size: contain;
  }
  75% {
    background: url("../images/explosion_4.png");
    background-size: contain;
  }
  100% {
    background: url("../images/explosion_4.png");
    background-size: contain;
    visibility: hidden;
  }
}