* {
  padding: 0;
  margin: 0;
  box-sizing: border-box;
  overflow: hidden;
}

body {
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  height: 100svh;
  background: linear-gradient(90deg, #395492, #0099c0, #3dd5a8);
  font-family: Arial, Helvetica, sans-serif;
  user-select: none;
}

.grid {
  display: grid;
  grid-template-columns: repeat(10, auto);
  grid-template-rows: repeat(20, auto);
  padding: 0.6vh;
  gap: 0.3vh;
  border-radius: 0.6vh;
  background-color: rgba(1, 8, 89, 0.5);
}

.grid>div {
  --cell-size: min(4.5vh, 7.5vw);
  height: var(--cell-size);
  width: var(--cell-size);
  border-radius: 0.3vh;
  background-color: rgba(126, 150, 221, 0.2);
}

.grid>div.ghost {
  background-color: rgba(255, 255, 255, 0.2);
}

.grid>div.I {
  background-color: #6be1ec;
}

.grid>div.J {
  background-color: #5eb0f3;
}

.grid>div.L {
  background-color: #f2c35b;
}

.grid>div.O {
  background-color: #f7e562;
}

.grid>div.S {
  background-color: #7be17b;
}

.grid>div.Z {
  background-color: #de5c6b;
}

.grid>div.T {
  background-color: #b276f3;
}

.grid>div.I,
.grid>div.J,
.grid>div.L,
.grid>div.O,
.grid>div.S,
.grid>div.T,
.grid>div.Z,
.grid>div.ghost,
.grid>div.sad {
  box-shadow: inset 2px 2px 2px rgba(255, 255, 255, 0.2),
    inset -2px -2px 2px rgba(1, 8, 89, 0.2);
}

.grid>div.sad {
  background-color: #f2c35b;
  transition: background-color 0.5s, box-shadow 0.5s;
}

.grid>div.hide {
  animation: hide 0.5s;
}

@keyframes hide {
  0% {
    transform: scale(0.8) rotate(30deg);
  }

  45% {
    transform: scale(0.8) rotate(-30deg);
  }

  90% {
    transform: scale(1) rotate(0);
  }
}