.thanks .intro_txt{
    margin-bottom: 40px;
    text-align: center;
}
.thanks h2{
    margin-bottom: 20px;
}
@media only screen and (max-width: 960px) {
    main{
        height: 90vh;
    }

}
@media only screen and (max-width: 568px) {
    main{
        height: auto;
    }
    .thanks h2{
        line-height: 1.5;
    }
    .thanks .intro_txt{
        text-align: left;
    }

}