.step-list {
    width: 35%;
    margin: 20px auto;
}
/* リストの番号 */
ol {
    counter-reset: my-counter;
    list-style: none;
    padding: 0;
    margin: 0;
}
ol li {
    font-size: 16px;
    line-height: 2.5;
    padding-left: 30px;
    position: relative;
}
ol li:before {
    content: counter(my-counter);
    counter-increment: my-counter;
    background-color: dodgerblue;;
    border: 1px solid;
    border-radius: 50%;
    box-sizing: border-box;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 2.5em;
    width: 2.5em;
    color: #fbfbfbfb;
    line-height: 2.5;
    position: absolute;
    left: -1%;
    transform: scale(.68);
    transform-origin: 0 50%;
}

.button-area {
    justify-content: flex-end;
}