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

body {
    width: 100vw;
    height: 100vh;
}

#object {
    position: absolute;
    width: 50px;
    height: 50px;
    background-color: tomato;
    border-radius: 50%;
    top: calc(50% - 25px);
    left: calc(50% - 25px);
}

#btn_ctn {
    margin: 10px;
    width: 150px;
    height: 150px;
    
    display: flex;
    flex-wrap: wrap;

    /* display: grid;
    grid-template-rows: 1fr 1fr 1fr;
    grid-template-columns: 1fr 1fr 1fr; */
}

.action, #setup_ctn {
    width: 50px;
    height: 50px;
}

#setup_ctn input {
    width: 50px;
    height: 25px;
}