:root {
    --bg-color: #033a12;
    --bg-color2: #303030;
    --text-color: #FFFBDB;
    --link-color: #fff39c;
    --text-color-heavy: #f75e38;
}

* {
    box-sizing: border-box;
}

body {
    background-color: var(--bg-color);
    max-width: 1000px;
    color: var(--text-color);
    font-family: Helvetica, Verdana, Geneva, Tahoma, sans-serif;
    margin-top: 0;
    margin: auto;
    text-align: center;
}

a {
    color: var(--link-color);
}

button {
    display: inline-block;
    text-align: center;
    background-color: var(--text-color);
    color: var(--bg-color2);
    font-size: 1.2em;
    border-radius: 8px;
    border: none;
    margin: 10px;
    padding-left: 30px;
    padding-right: 30px;
    cursor: pointer;
    width: 180px;
}

.fehler {
    color: var(--text-color-heavy);
    font-weight: bold;
    margin-left: 4em;
    text-align: left;
}

button > span {
    display: inline-block;
    position: relative;
    transition: 0.5s;
}

button span:after {
  content: '\00bb';
  position: absolute;
  right: -20px;
  opacity: 0;
  transition: 0.5s;
}

button:hover span {
  padding-right: 15px;
}

button:hover span:after {
  opacity: 1;
  right: 0;
}