*{
    margin:0;
    padding:0;
    box-sizing:border-box;
}

body{
    background:#000;
    display:flex;
    justify-content:center;
    align-items:center;
    min-height:100vh;
}

.poster-section{
    position:relative;
    width:100%;
    max-width:640px;
}

.poster{
    width:100%;
    display:block;
}

/* Common style */
.btn{
    position:absolute;
    left:50%;
    transform:translateX(-50%);
    width:56%;
    display:block;
}

.btn img{
    width:100%;
    display:block;
    transition:.3s;
}

.btn:hover img{
    transform:scale(1.03);
}

/* Button Positions */
.join{
    top:38%;
    width:42%;
}

.buy{
    top:50%;
     width:50%;
}

.referral{
    top:63%;
    width:58%;
}

/* Mobile */
@media(max-width:768px){

    .poster-section{
        max-width:100%;
    }

    
}