*::before,
*::after {
    box-sizing: border-box;
}

.signature-pad {
    position: relative;
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    -webkit-box-orient: vertical;
    -webkit-box-direction: normal;
    -ms-flex-direction: column;
    flex-direction: column;
    font-size: 10px;
    width: 100%;
    height: 100%;
    max-width: 700px;
    border: 1px solid #e8e8e8;
    background-color: #fff;
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.27), 0 0 40px rgba(0, 0, 0, 0.08) inset;
    border-radius: 4px;
    padding: 16px;
}

    .signature-pad::before,
    .signature-pad::after {
        position: absolute;
        z-index: -1;
        content: "";
        width: 40%;
        height: 10px;
        bottom: 10px;
        background: transparent;
        box-shadow: 0 8px 12px rgba(0, 0, 0, 0.4);
    }

    .signature-pad::before {
        left: 20px;
        -webkit-transform: skew(-3deg) rotate(-3deg);
        transform: skew(-3deg) rotate(-3deg);
    }

    .signature-pad::after {
        right: 20px;
        -webkit-transform: skew(3deg) rotate(3deg);
        transform: skew(3deg) rotate(3deg);
    }

.signature-pad--body {
    position: relative;
    -webkit-box-flex: 1;
    /*-ms-flex: 1;*/
    /*flex: 1;*/
    /*border: 1px solid #f4f4f4;*/
}

    .signature-pad--body canvas {
        left: 0;
        top: 0;
        width: 100%;
        height: 60px;
        border-radius: 4px;
        box-shadow: 0 0 5px rgba(0, 0, 0, 0.02) inset;
    }

.signature-pad--footer {
    color: #C3C3C3;
    text-align: center;
    font-size: 1.2em;
    margin-top: 8px;
}

.signature-pad--actions {
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    -webkit-box-pack: justify;
    -ms-flex-pack: justify;
    justify-content: space-between;
    margin-top: 8px;
}

#github img {
    border: 0;
}

.signature-pad--red {
    padding: 10px 10px;
    border: 3px solid red;
    border-radius: 4px;
}

    .signature-pad--red::after {
        color: red;
        font-size: 15px;
        font-weight: bolder;
        content: "Die Unterschrift ist nicht optional, bitte Unterschrift vornehmen.";
    }

@media (max-width: 940px) {
    #github img {
        width: 90px;
        height: 90px;
    }
}