.gauge {
    width: 100%;
    max-width: 250px;
}

/*  mak the height half its width */
.gauge__body {
    width: 100%;
    height: 0;
    padding-bottom: 50%;
    /*background-color: #b4c0be;*/
    background-color: #87bdf6;
    /*background-color:white;*/
    position: relative;
    border-top-left-radius: 100% 200%;
    border-top-right-radius: 100% 200%;
    overflow: hidden;
}

.gauge__fill {
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    height: 100%;
    /*background-color: #009578;*/
    background-color: #4080c3;
    /*background-color: white;*/
    transform-origin: 50% 0%;
    transform: rotate(0.1turn);
    transition: transform 200ms ease-out;
}

.gauge__body:hover .gauge__fill {
    transform: rotate(0.50turn);
}

.gauge__cover {
    width: 75%;
    height: 150%;
    background-color: rgb(255, 255, 255);
    position: absolute;
    border-radius: 50%;
    top: 25%;
    left: 50%;
    transform: translateX(-50%);
    /*  text valeur jauge*/
    display: flex;
    justify-content: center;
    align-items: center;
    padding-bottom: 25%;
    box-sizing: border-box;
    font-weight: bold;
    font-size: 32px;
    color: #4080c3;
}