talk_arena/styles.css

@media (max-width: 768px) {
    .lam-response-box {
        max-height: 230px;
    }

    .lam-response-box > label {
        max-height: 100%;
    }
    
    .lam-response-box > label > div > textarea{
        max-height: 100%;
        height: 100% !important;
    }
}

@media (min-width: 769px) {
    .lam-response-box {
        max-height: 40vh;
    }

    .lam-response-box > label > div > textarea{
        max-height: calc(40vh - 50px) !important;
    }
}