.w3-content{
max-width:980px
}

.w3-section,.w3-code{
margin-top:0px!important;
margin-bottom:0px!important
}

.w3-animate-fading{
animation:fading 10s infinite
}

@-webkit-fading{
0%{opacity:0}50%{opacity:1}100%{opacity:0}
}

@keyframes fading{
0%{opacity:0}50%{opacity:1}100%{opacity:0}
}