style.css

.footer {
    color: white; background: rgba(0, 0, 0, 0.99);
    position: fixed; top: 90%;
    text-align:center; width:100%;
}

.exclaim .reveal .state-background {
  background: black;
} 

.exclaim .reveal h1,
.exclaim .reveal h2,
.exclaim .reveal p {
  color: white;
}
.reveal pre {   
  margin-top: 0;
  max-width: 100%;
  border: 1px solid #ccc;
  white-space: pre-wrap;
  margin-bottom: 1em; 
}

body {
  background: white;
  background-color: white; }

.reveal pre code {
  display: block; padding: 0.5em;
  font-size: 1.6em;
  line-height: 1.1em;
  background-color: white;
  overflow: visible;
  max-height: none;
  word-wrap: normal;
}

.reveal code {
  overflow: visible;
  max-height: none;
}

.reveal code.r {
  background-color: #F8F8F8;
}

.reveal code.cpp {
  background-color: #F8F8F8;
}
.reveal h1,
.reveal h2,
.reveal h3,
.reveal h4,
.reveal h5,
.reveal h6 {
  margin: 0 0 20px 0;
  color: purple;
  line-height: 0.9em;
  letter-spacing: 0.02em;
  text-transform: none;
  text-shadow: none; }

.section .reveal .state-background {
   background: #96A2B6;
}

.section .reveal h1 {
   color: white;
   margin-top: 250px;
   margin-left: 350px;
   font-size: 4em;
}



.section .reveal p {
   color: white;
   margin-top: 50px;
   margin-left: 350px;
}

.reveal h1 {
  text-shadow: 0px 0px 6px rgba(0, 0, 0, 0.2); }