.app {
    background: rgb(191,191,191);
    background: linear-gradient(135deg, rgba(191,191,191,1) 0%, rgba(175,175,175,1) 49%, rgba(227,227,227,1) 100%);
    color: black;
    padding: 10px;
    border-radius: 10px;
    margin-bottom: 40px;
}

.app button {
    padding: 3px;
    border-radius: 5px;
}