body {
  background-image: url("https://cdn.pixabay.com/photo/2022/03/21/02/08/land-7082135__340.jpg");
}

.Subheading {
  font-family: Cursive;
  text-align: center;
  text-decoration: underline;
  text-shadow: 0 0 3px #FF0000, 0 0 5px #0000FF;
  font-size: x-large;
  border-style: solid;
  border-color: purple;
  border-width: auto;
  background-color: yellow;
  height: 90%;
  border-radius: 10px 50px;
  padding: 4px;
}
.p1 {
  border-style: solid;
  border-color: blue;
  border-radius: 20px;
  padding: 4px;
  text-align: left;
  background-color: yellow;
  border-width: auto;

}
div {
  border-radius: 12px;
  width: auto;
  height: auto;
  text-align: center;
}
.introSection {
  font-family: Fantasy;
  border-style: solid;
  text-align: center;
  font-size: xx-large;
  text-shadow: 0 0 3px #FF0000, 0 0 5px #0000FF;
}
img{
  width: 100%;
  height: 105%;
  border-radius: 50%
}
.twoColumnGrid {
display: grid;
width: 100%;
grid-gap: 1%;
grid-template-columns: 30% 69%;
}
a:link{
  color: red;
}
a:visited{
  color: green;
}
a:hover{
  color: hotpink;
}
a:active{
  color: blue;
}
#Image1 {
  display: block;
}
#Image3 {
  display: none;
}
#Image2 {
  display: none;
}
#collapsibleText{
  display: none;
}
button{
  color: yellow;
  background-color: red;
  border-radius: 10%;
  cursor: pointer;
  font-weight: bold;
}
#demo{
  color:red;
  border:red;
  background-color:blue;
}
section {
  position: relative;
  width: 100%;
  height: 100vh;
  overflow:hidden;
  display: flex;
  justify-content:center;
  align-items: center;
}
section h4 {
  font-size: 4em;
  color: gold;
}
section span{
  position: absolute;
  bottom: -50px;
  background: transparent;
  border-radius: 50%;

  pointer-events:none;
  box-shadow: inset 0 0 10px rgba(255,255,255,0.5);
  animation: animate 4s linear infinite;
}
section span:before{
  content:'';
  position: absolute;
  width:100%;
  height:100%;
  transform: scale(0.25) translate(-70%,-70%);
  background: radial-gradient(#fff,transparent);
  border-radius: 50%;
}
@keyframes animate{
  0%{
    transform: translateY(0%);
    opacity:1;
  }
  99%
  {
    opacity:1;
  }
  100%{
    transform: translateY(-1200%);
    opacity:0;
  }
}