html, body {
    margin: 0;
    padding: 0;
    width: 100%;
    height: 100%;
}

body {
    font-weight: bold;
    font-size: 30px;
    margin: 10px;
}

#color-input {
    z-index: 1;
    cursor: pointer;
    opacity: 0;
    position: absolute;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
}

.message {
    font-weight: bold;
    font-size: 30px;
    text-align: center;
    margin-top: 30px;
}

#gallery {
    z-index: 10;
    position: absolute;
    width: 100px;
    height: 100%;
    top: 0px;
    left: 0px;
}

.gallery-item {
    cursor: pointer;
    width: 100px;
    height: 100px;
}

.add {
    visibility: hidden;
}

body:hover .add {
    visibility: visible;
    font-size: 80px;
    color: white;
}