html, body, #app {
    width: 100%;
    height: 100%;
}

:root {
    --radius: 40px;
}

#app {
    height: calc(100% - 30px);
}

.circle {
    position: relative;

    width: var(--radius, 20px);
    height: var(--radius, 20px);

    color: #8a64eb;
    border: 2px solid currentColor;
    border-radius: 50%;
    background-color: rgba(255, 255, 255, 0.7);

    transform: translate(-50%, -50%);
}

.circle-content {
    position: absolute;
    top: 50%;
    left: 50%;

    display: flex;
    justify-content: center;
    align-items: center;

    width: 70%;
    height: 70%;

    border-radius: 50%;
    background-color: currentColor;

    transform: translate3d(-50%, -50%, 0);
}

.circle-text {
    font-size: 0.9em;

    color: #fff;
}

.pin {
    transform: translate(-50%, -100%);
}