body {
    color :black;
    background: no-repeat url("https://www.wallpaperflare.com/static/268/327/607/cortana-windows-phone-minimalism-round-wallpaper.jpg");
    background-size: 100%;
}
h1 { text-align: center;
    margin:+20px;
    font-weight: bold;
    color : darkred;
    font-size: 36px;}

h2 {font-size: 28px;margin:+2px;}
h3 {font-size: 26px;margin:+15px;}
h4 {font-size: 21px;margin:+15px;}
p  {font-size: 16px;margin:+5px;}
div {font-size: 16px;margin:+5px;}
ul {font-size: 16px;margin:+5px;}

em {
    text-align: center;
    font-size: 21px;
    margin:+15px;
}


button {
    background-color: Transparent;
    background-repeat:no-repeat;
    border: none;
    cursor:pointer;
    overflow: hidden;
    outline:none;
}

.gif_panel{
    float:center;
    display: block;
    text-align: center;
    margin-left: auto;
    margin-right: auto;
    width: 100%;
  }
.center{
    text-align: center
}
.left{
    text-align: left;
}
.right{
    text-align: right;
}