html {
  font-size: 14px;
}

@media (min-width: 768px) {
  html {
    font-size: 16px;
  }
}

html {
  position: relative;
  min-height: 100%;
}

body {
  margin-bottom: 60px;
}

.card {
    background-color: white;
    padding: 20px;
    margin-top: 20px;
}

.css-ampel {
    display: inline-block;
    width: 30px;
    height: 90px;
    border-radius: 6px;
    position: relative;
    background-color: black;
    zoom: 1.7;
}

    .css-ampel span,
    .css-ampel:before,
    .css-ampel:after {
        content: "";
        color: white;
        position: absolute;
        border-radius: 15px;
        width: 22px;
        height: 22px;
        left: 4px;
    }

    .css-ampel:before {
        top: 6px;
        background-color: red;
        background-color: dimgrey;
    }

    .css-ampel:after {
        top: 34px;
        background-color: yellow;
        background-color: dimgrey;
    }

    .css-ampel span {
        top: 62px;
        background-color: green;
        background-color: dimgrey;
    }

.ampelrot:before {
    background-color: red;
    box-shadow: 0 0 20px red;
}

.ampelgelb:after {
    background-color: yellow;
    box-shadow: 0 0 20px yellow;
}

.ampelgruen span {
    background-color: limegreen;
    box-shadow: 0 0 20px limegreen;
}