hs-aerial  {
    position: absolute;
    display: block;
    left: 50%; top: 50%; width: 100%; height: 100%;
    transform: translate(-50%,-50%) scale(1);
    transform-origin: center;
    opacity: 1;
    transition: transform var(--transition-duration), opacity var(--transition-duration);
}

hs-aerial .spot {
    position: absolute;
    left: 50%; top: 50%; width: 30px; height: 30px;
    transform: translate(-50%,-50%) scale(1);
    border-radius: 100px;
    background-color: rgba(255,255,255,1);
    transition: opacity calc(var(--transition-duration) / 2), transform calc(var(--transition-duration) / 2);
    opacity: 1;
    pointer-events: none;
    z-index: 0;
}

hs-aerial .ring-big {
    position: absolute;
    left: 50%; top: 50%; width: 40px; height: 40px;
    transform: translate(-50%,-50%) scale(1);
    border-radius: 100px;
    border: 2px solid rgba(255,255,255,1);
    pointer-events: none;
    opacity: 0.5;
    transition: opacity var(--transition-duration);
    z-index: 0;
    animation: hs_aerial_ring_pulse 2s infinite  linear;
}

hs-aerial:hover .ring-big {
    opacity: 1;
}

hs-aerial .ring-small {
    position: absolute;
    left: 50%; top: 50%; width: 20px; height: 20px;
    transform: translate(-50%,-50%) scale(1);
    border-radius: 100px;
    border: 2px solid rgb(0, 0, 0);
    pointer-events: none;
    z-index: 0;
    font-family: Arial, Helvetica, sans-serif;
    font-size: 16px; line-height: 20px;
    text-align: center;
}

hs-aerial .popup {
    position: absolute;
    left: 50%; bottom: 100%; width: 30rem; height: auto;
    transform: translate(-50%,-10px) scale(0.5);
    transform-origin: bottom;
    border-radius: 8px;
    background-color: rgba(0,0,0,0.9); /* C Gratiot - Darker popup */
    padding: 2rem;
    transition: opacity calc(var(--transition-duration) / 2), transform calc(var(--transition-duration) / 2);
    transition-delay: 0.2s;
    opacity: 0;
    pointer-events: none;
    z-index: 0;
    /* white-space: pre-line; */
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
}

hs-aerial .popup::before {
    content: '';
    position: absolute;
    left: 50%; top: 100%; transform: translate(-50%,0);
    width: 0px; height: 0px;
    border-style: solid;
    border-width: 10px 7px 0px 7px;
    border-color: rgba(0,0,0,0.9) transparent transparent transparent;
}

hs-aerial:hover .popup,
hs-aerial.open .popup {
    transition-delay: 0.0s;
    transform: translate(-50%,-10px) scale(1);
    opacity: 1;
    pointer-events: all;
}


hs-aerial .popup hs-aerial-title,
hs-aerial .popup hs-aerial-dist,
hs-aerial .popup hs-aerial-descr,
hs-aerial .popup hs-aerial-hint {
    position: relative; 
    display: block; width: auto;
    font-family: Verdana, Geneva, Tahoma, sans-serif;
    text-align: center;
    color: #ffffff;
    margin-bottom: 1rem;
}

hs-aerial .popup hs-aerial-title { font-size: 1.6rem; font-weight: bold; }
hs-aerial .popup hs-aerial-dist { font-size: 1.2rem; padding-left: 3rem; }
hs-aerial .popup hs-aerial-descr { font-size: 1.2rem; }
hs-aerial .popup hs-aerial-hint { font-size: 1.2rem; margin-bottom: 0rem; font-style: italic; }

hs-aerial .popup hs-aerial-dist::before {
    content: '';
    position: absolute;
    left: 0; top: 0; width: 3rem; height: 100%; 
    background-size: contain;
    background-repeat: no-repeat;
    background-position: center;
    background-image: url(images/figurewalk.png);
}



body.hs-scale-down hs-aerial {
    opacity: 0.7;
    transform: translate(-50%,-50%) scale(0.7);
}



@keyframes hs_aerial_ring_pulse {
    0% {
        opacity: 0;
        transform: translate(-50%, -50%) scale(1);
    }

    50% {
        opacity: 0.5;
        transform: translate(-50%, -50%) scale(1.2);
    }

    100% {
        transform: translate(-50%, -50%) scale(1.4);
        opacity: 0
    }
}