nav {
  /* border: 1px solid black; */
  border-radius: 15px;
  background-color: #D3D3D3;
  backdrop-filter: blur(0.75rem);
  opacity: 0.95;

  position: fixed;
  top: 0;
  /* left:0; */

  width: 80%;
  z-index: 3;
}

ul {
  list-style-type: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: row;
  justify-content: space-evenly;
}

nav li a {
  display: block;
  color: black;
  padding: 1rem 1rem;
  text-align: center;
  text-decoration: none;
}

nav li a:hover{
  background-color: #929292;
}

.center-container {
  /*border: 1px solid black;*/
  border-radius: 15px;

  /* display flex properties*/
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;

  z-index: 2;
}

.center-container h1 p {
  color: black;
}

.center-container h1 {
  font-size: 4vw;
  margin-bottom: 0.5rem;
}

.center-container p {
  font-size: 1.5vw;
}

a.button {
  border: 3px solid #FF9800;
  border-radius: 15px;

  display: flex;
  align-items: center;
  justify-content: center;

  width: 8rem;
  height: 3rem;
  margin-top: 1rem;
  padding: 0.50rem;
}

a.button:link,
a.button:visited {
  color: black;
  text-decoration: none;
}

a.button:hover {
  background-color: #FF9800;
  opacity:0.9;
}

#particles-js {
  position: absolute;
  width: 100%;
  height: 80%;
  background-color: #fff;
  background-image: url("");
  background-repeat: no-repeat;
  background-size: cover;
  background-position: 50% 50%;
}