body
{
    margin:0;
    padding:0;
}

div.attopdark
{
    /* border-style:solid; 
    border-color:dimgray;
    border-width:5px; */
    background-color: rgb(0, 0, 0);
    animation: divlighttodark 1s;
    position: sticky;
    /* line-height: 0px; */
    top: 0px;
    margin: 0px;
    height: 100px;
}

button.tolight {
    background-color: #ffffff; 
    border: none;
    color: rgb(0, 0, 0);
    padding: 15px 32px;
    text-align: center;
    text-decoration: none;
    display: inline-block;
    font-size: 16px;
}

p.attopdark
{
    margin: 0;
    color: rgb(255, 255, 255);
    font-family: Ubuntu;
    text-align: center;
    font-weight: 700;
    /* height: 100px; */
    font-size: 50px;
}
div.attoplight
{
    /* border-style:solid; 
    border-color:dimgray;
    border-width:5px; */
    background-color: rgb(255, 255, 255);
    animation: divdarktolight 1s;
    position: sticky;
    /* line-height: 0px; */
    top: 0px;
    margin: 0px;
    height: 100px;
}

p.attoplight
{
    margin: 0;
    color: rgb(0, 0, 0);
    font-family: Ubuntu;
    text-align: center;
    font-weight: 700;
    /* height: 100px; */
    font-size: 50px;
}

button.todark {
    background-color: #000000; 
    border: none;
    color: rgb(255, 255, 255);
    padding: 15px 32px;
    text-align: center;
    text-decoration: none;
    display: inline-block;
    font-size: 16px;
}
@keyframes divlighttodark
{
    0%{background-color: #ffffff;}
    100%{background-color: #000000;}
}

@keyframes divdarktolight
{
    0%{background-color: #000000;}
    100%{background-color: #ffffff;}
}