index.css

body {
  font-family: Arial, Helvetica, sans-serif;
  background: rgba(0, 0, 0, 0.3) url("/images/welcome_bg.jpg");
  background-blend-mode: darken;
  background-size: cover;
}

nav {
  box-sizing: border-box;
  border: 2px solid rgb(245, 15, 249);
  background-color: #fff;
  position: fixed;
  display: flex;
  top: 0;
  left: 0;
  width: 100%;
  align-items: center;
}

nav h2 {
  margin-left: 11px;
  cursor: pointer;
  color: #000;
}

nav h2 span {
  font-style: italic;
  color: rgb(245, 15, 249);
}

nav ul {
  flex: 1;
  text-align: center;
}

nav ul li {
  display: inline-block;
  margin: 10px 20px;
  padding: 4px;
}

nav ul li a {
  padding: 15px;
  text-decoration: none;
  color: #000;
  transition: 2s;
}

nav ul li a:hover {
  box-shadow: 0 5px 20px rgb(131, 28, 172) inset,
    0 5px 20px rgb(131, 28, 172) inset, 0 5px 20px rgb(131, 28, 172) inset,
    0 5px 20px rgb(131, 28, 172) inset;
}

nav .btn {
  color: #000;
  text-decoration: none;
  margin-right: 25px;
  padding: 10px;
  box-sizing: border-box;
  border-radius: 20px;
  padding: 12px;
  background-color: rgb(245, 15, 249);
}

.content {
  position: absolute;
  margin-top: 5%;
  margin-left: 5%;
  color: #fff;
  font-size: 40px;
}

.content p {
  margin-top: -20px;
  font-size: 30px;
}

.play {
  position: absolute;
  margin-left: 16%;
  margin-top: 32%;
  font-size: 30px;
}

.play a {
  text-decoration: none;
  color: #fff;
  background-color: rgb(42, 6, 75);
  padding: 20px;
  padding-left: 50px;
  padding-right: 50px;
  border: 4px solid hsl(0, 0%, 100%);
}

.card {
  position: absolute;
  left: 58%;
  top: 31%;
  /* background-color: #fff; */
  width: 400px;
  height: 400px;
  border-radius: 200px;
  filter: grayscale(100%);
  animation-name: ani;
  animation-duration: 5s;
  animation-iteration-count: infinite;
}

.card img {
  object-fit: cover;
  height: 100%;
  object-position: 68%;
  /* left: 68px; */
}
@keyframes ani {
  from {
    /* background-color: #fff; */
    cursor: pointer;
    transition: all 0.5s ease-in-out;
    transform: scale(0.5);
  }
  to {
    filter: grayscale(0);
  }
}

/*.card:hover{
 /*   background-color: #fff; 
    filter: grayscale(0);
}

.card:hover.card img{
    cursor: pointer;
    transition: all 0.5s ease-in-out;
    transform: scale(1.4);
}  */