body{
    background-color:#121212;
    color: #f2f2f2;
    font-family: 'Arial', sans-serif;
    margin: 0;
    padding: 0;
    background-image: url('bg.png');
    background-size: cover;
    background-attachment: fixed;
    width: 100%;
}
#maintext{
    font-size: 100px;
    font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    margin-top: 50%;
}
#tagline{
    display: flex;
    font-size: 50px;
    font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
    justify-content: center;
    align-items: center;
    opacity: 0; 
    transition: opacity 1s ease-in-out; 
}
#tagline2{
    display: flex;
    font-size: 50px;
    font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
    justify-content: center;
    align-items: center;
    margin-top: 40%;
    margin-left: 60%;
}
#tagline3{
    display: flex;
    font-size: 50px;
    font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
    justify-content: center;
    align-items: center;
    margin-top: 40%;
    margin-left: 0%;
}

#info{
    margin-top: 30%;
    display: flex;
    font-size: 25px;
    font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
    justify-content: center;
    align-items: center;
}
#topics{
    display: flex;
    font-size: 50px;
    font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
    justify-content: center;
    align-items: center;
    margin-left: 0%;
}
#topic1 {
    opacity: 0;
}
#topic2 {
    opacity: 0;
    margin-top: 10%;
    margin-left: 20%; 
}
#topic3 {
    opacity: 0;
    margin-top: 40%;
    margin-left: 20%; 
}
#topic4 {
    opacity: 0;
    position: absolute;
    margin-top: 45%;
    margin-left: -50%;
}
#topic5 {
    opacity: 0;
    margin-top: 15%;
}
#topic6 {
    opacity: 0;
    display: block;
    margin-top: 30%;
    position: absolute;
}
#topic7 {
    opacity: 0;
    display: block;
    margin-top: 60%;
    margin-left: 0%;
    position: absolute;
}
#pagend{
    margin-top: 100000%;
}
#gamifiedimage{
    position:relative;
    margin-left: 3%;
    margin-top: -15%;
}
#dlimg{
    position:absolute;
    margin-top:75.65%;
    width: 5%;
    margin-left: 3%;
    margin-bottom: 50%;
    z-index: 1001;
}
#dlbutton{
    background-color: #FC4005;
    font-family: Arial, Helvetica, sans-serif; 
    overflow: hidden; 
    border-radius: 30px;
    z-index: 1000; 
    margin-top: 20%;
    width: 25%;
    transform: translateX(150%);

}
#dlbutton a {
    float: left;
    color: #121212;
    text-align: center;
    padding: 14px 16px;
    text-decoration: none;
    font-size: 30px;
  }
.topnav {
    position: fixed; 
    top: 0;          
    left: 50%;        
    transform: translateX(-50%); 
    transition: background-color 2s; 
    background-color: #FC4005;
    font-family: Arial, Helvetica, sans-serif; 
    overflow: hidden; 
    border-radius: 30px; 
    z-index: 1000;
    margin-top: 1%;
    box-sizing: border-box; 
}

  
  .topnav a {
    float: left;
    color: #121212;
    text-align: center;
    padding: 14px 16px;
    text-decoration: none;
    font-size: 17px;
  }