:root {
    --stepMargin: 20px;
    --stepSize: 50px;
    --stepColor: #5d95fe;
}

#app {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
}

.setting-area {
    position: absolute;
    top: 30px;
    z-index: 1;
}

#progress_step::before {
    content: '';
    background-color: #ebebed;
    position: absolute;
    width: calc(100% - var(--stepMargin) - var(--stepMargin));
    height: 5px;
    left: var(--stepMargin);
}

#progress_step {
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: relative;
    width: calc(100% - var(--stepMargin));
    height: 300px;
}

.progress-bar {
    position: absolute;
    height: 5px;
    background-color: var(--stepColor);
    transition: 0.1s ease;
    left: var(--stepMargin);
}

.step {
    width: var(--stepSize);
    height: var(--stepSize);
    margin: var(--stepMargin);
    border-radius: 50%;
    border: 5px solid #ebebed;
    background-color: white;
    text-align: center;
    line-height: var(--stepSize);
    font-weight: bolder;
    font-size: calc(var(--stepSize) / 2.5);
    z-index: 2;
}

.step.active {
    background-color: var(--stepColor);
    border-color: var(--stepColor);
    color: white;
}