#toggle_checkbox
{
    display: none;
}

label
{
    display: block;
    position: absolute;
    top: 50%;
    right: 0;
    left: 0;
    width: 116px;
    height: 56px;
    margin: 0 auto;
    background-color: #03a9f4;
    border-radius: 56px;
    transform: translateY(-50%);
    cursor: pointer;
    transition: 0.3s ease background-color;
    overflow: hidden;
}

#star
{
    position: absolute;
    top: 13px;
    left: 13px;
    width: 30px;
    height: 30px;
    background-color: #fff;
    transform: scale(1);
    border-radius: 50%;
    transition: 0.3s ease top, 0.3s ease left, 0.3s ease transform, 0.3s ease background-color;
    z-index: 1;
}

#star-1
{
    position: relative;
}

#star-2
{
    position: absolute;
    transform: rotateZ(36deg);
}

.star
{
    top: 0;
    left: -7px;
    font-size: 54px;
    line-height: 28px;
    color: #fff;
    transition: 0.3s ease color;
}

#moon
{
    position: absolute;
    bottom: -52px;
    right: 8px;
    width: 40px;
    height: 40px;
    background-color: #fff;
    border-radius: 50%;
    transition: 0.3s ease bottom;
}

#moon:before
{
    content: "";
    position: absolute;
    top: -12px;
    left: -17px;
    width: 40px;
    height: 40px;
    background-color:#03a9f4;
    border-radius: 50%;
    transition: 0.3s ease background-color;
}

#toggle_checkbox:checked + label
{
    background-color: #000;
}

#toggle_checkbox:checked + label #star
{
    top: 3px;
    left: 64px;
    transform: scale(0.3);
    background-color: yellow;
}

#toggle_checkbox:checked + label .star
{
    color: yellow;
}

#toggle_checkbox:checked + label #moon
{
    bottom: 8px;
}

#toggle_checkbox:checked + label #moon:before
{
    background-color: #000;
}