прыгающий мячик

by Ksenia Polyakova

HTML

<div class="box">
  <div class="ball"></div>  
</div>

CSS

@keyframes shadow {
  100% {
    transform: scale(1.5, 0.5);
  }
}

@keyframes ball {
  0% {
    transform: translateY(0);
  } 
  70% {
    width: 50px;
    height: 50px;
  }
  100% {
    transform: translateY(150px);
    width: 60px;
    height: 40px;
  }
}

.box {
  height: 200px;
  width: 100px;
  text-align: center;
  position: relative;
}

.ball, .box::before {
  animation-duration: 1s;
  animation-iteration-count: infinite;
  animation-direction: alternate;
  animation-timing-function: ease-in;
  width: 50px;
  height: 50px;
  border-radius: 50%;
}


.ball {
  display: inline-block;
  animation-name: ball;
  background-color: white;
  box-shadow: inset 0 -10px 20px 12px lime, inset 0 0 3px 3px green;
}

.box::before {
  position: absolute;
  bottom: 0;
  left: 25px;
  animation-name: shadow;
  content: '';
  display: block;
  background: radial-gradient(circle at 50% 50%, rgba(0, 0, 0, 0.9), rgba(0, 0, 0, 0.1) 40%, rgba(0, 0, 0, 0) 50%);
  transform: scale(2.5, 0.5);
}

/* <сдвиг по x> <сдвиг по y> <размытие> <растяжение> <цвет> */