.grid-main {
    height: 100vh;
}

.form-elements-group {
    /** 78px btn-navigation height */
    height: calc(100% - 106px);

}

.btn-container {

}


/*
    desktop max-width 980px
 */
@media only screen and (min-width: 980px){
    .grid-content {
        max-width: 980px;
        margin: 0 auto;
    }
}