#mainContainer {
    display: flex;
    gap: 8px;
    flex-direction: column;
    box-sizing: border-box;
}

#inputContainer {
    display: flex;
    gap: 10px;
}

    #inputContainer > div {
        display: flex;
        flex-direction: column;
        gap: 1px;
    }

input, select {
    padding: 3px;
    text-align: center;
}

#go {
    display: flex;
    align-self: flex-end;
    font-size: 24px;
}

#result {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 15px;
    padding: 15px 0;
    border-top: 3px solid;
    margin: 0;
}

    #result > li {
        display: flex;
        flex-direction: column;
        counter-reset: sequence;
        gap: 4px;
        border: 1px solid lightgray;
        border-radius: 5px;
        padding: 15px;
        margin: 0;
    }

        #result > li > strong {
            text-align: center;
            border-bottom: 1px solid;
        }

        #result > li > span {
            padding: 3px 0;
        }

            #result > li > span:before {
                counter-increment: sequence;
                content: "Step " counter(sequence) ":";
                margin-right: 10px;
            }

        #result > li.zero {
            outline: 3px solid red;
        }

        #result > li.final > span:last-child {
            background-color: green;
            border-radius: 3px;
            color: white;
            font-weight: 700;
        }