html,
body {
    width: 100%;
    height: 100%;
    display: flex;
    background: #e4e4e4;
}

.container {
    position: relative;
    width: 140px;
    margin: auto;
}

.battery {
    height: 220px;
    box-sizing: border-box;
    border-radius: 15px 15px 5px 5px;
    filter: drop-shadow(0 1px 3px rgba(0,0,0,0.22));
    background: #fff;
    z-index: 1;
    
    &::before {
        content: "";
        position: absolute;
        width: 26px;
        height: 10px;
        left: 50%;
        top: 0;
        transform: translate(-50%, -10px);
        border-radius: 5px 5px 0 0;
        background: rgba(240, 240, 240, .88);
    }
    
    &::after {
        content: "";
        position: absolute;
        left: 0;
        right: 0;
        bottom: 0;
        top: 90%;
        background: linear-gradient(to bottom, #7abcff 0%, #00BCD4 44%, #2196F3 100%);
        border-radius: 0px 0px 5px 5px;
        box-shadow: 0 14px 28px rgba(33, 150, 243, 0), 0 10px 10px rgba(9, 188, 215, 0.08);
        animation: charging 6s linear infinite;
        filter: hue-rotate(90deg);
    }
}

@keyframes charging {
  50% {
        box-shadow: 0 14px 28px rgba(0, 150, 136, 0.83), 0px 4px 10px rgba(9, 188, 215, 0.4);
    }
    
    95% {
        top: 5%;
        filter: hue-rotate(0deg);
        border-radius: 0 0 5px 5px;
        box-shadow: 0 14px 28px rgba(4, 188, 213, .2), 0 10px 10px rgba(9, 188, 215, 0.08);
    }
    100% {
        top: 0%;
        filter: hue-rotate(0deg);
        border-radius: 15px 15px 5px 5px;
        box-shadow: 0 14px 28px rgba(4, 188, 213, 0), 0 10px 10px rgba(9, 188, 215, 0.4);
    }
}