body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, 
      'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell,
      'Open Sans', 'Helvetica Neue', sans-serif;
}
.heading {
    position: absolute;
    text-align: center;
    top: 30%;
    width: 100%;
}
.heading h1 {
    color: limegreen;
    font-size: 70px;
}
.heading h3 {
    color: wheat;
    font-size: 20px;
}
#particles-js {
    background: black;
    height: 100vh;
}


/*--------------------------------------------------------------
# mainPage Section
--------------------------------------------------------------*/
#mainPage {
  width: 100%;
  height: 100vh;
  background: url("../img/mainPage-bg.jpg") top right no-repeat;
  background-size: cover;
  position: relative;
  z-index:-1;
}

@media (min-width: 992px) {
  #mainPage {
    padding-left: 0px;
  }
}

#mainPage:before {
  content: "";
  position: absolute;
  bottom: 0;
  top: 0;
  left: 0;
  right: 0;
}

#mainPage h1 {
  margin: 0;
  font-size: 64px;
  font-weight: 700;
  line-height: 56px;
  color: #45505b;
}

#mainPage p {
  color: #45505b;
  margin: 15px 0 0 0;
  font-size: 26px;
  font-family: "Poppins", sans-serif;
}

#mainPage p span {
  color: #0563bb;
  letter-spacing: 1px;
}

#mainPage .social-links {
  margin-top: 30px;
}

#mainPage .social-links a {
  font-size: 24px;
  display: inline-block;
  color: #45505b;
  line-height: 1;
  margin-right: 20px;
  transition: 0.3s;
}

#mainPage .social-links a:hover {
  color: #0563bb;
}

@media (max-width: 992px) {
  #mainPage {
    text-align: center;
  }
  #mainPage h1 {
    font-size: 32px;
    line-height: 36px;
  }
  #mainPage p {
    margin-top: 10px;
    font-size: 20px;
    line-height: 24px;
  }
}