header {
 font-family: Futura; Trebuchet MS;
 font-weight: bold condensed;
 color: #008080; 
 font-size: 50px;
}

body {
 font-family: Verdana, sans-serif;
 color: #000000;
 font-size: 20px;
}

h1 {
 font-family: Courier; Monospace;
 font-weight: bold condensed;
 color: #000; 
 font-size: 30px;
}

#content{
 padding: 3px;
}


#main_nav ul { padding: 0; margin: 0; }

#main_nav li  {
  list-style-type: none; /* remove bullet points */ 
}

#main_nav li a {
   display: block;
   text-decoration: none; /* remove underline */
   border-radius: 5px;  /* rounded corners */
   margin: 5px;
   padding: 10px;
   font-weight: bold;
   background-color: #666;

   /* nice gradient shade on the buttons */
   background-image: linear-gradient(to bottom, rgba(255,255,255,0), rgba(255,255,255,1));

   border: 1px solid #000; /* dark outline */
}

nav li:active {
  background-color: #ccc;
  background-image: none;
  box-shadow: inset 0 3px 3px rgba(0, 0, 0, .2);
}

footer{
 font-family: Futura; Trebuchet MS;
 color: #008080; 
 font-size: 20px;
}


header.secondary{   
   padding-left: 75px;
}

button {
   /*center the button*/
   display: block;
   width: 50%;
   margin-left: auto;
   margin-right: auto;
 
   /* add your code to set top and bottom margins */
   margin-top: 6px;
   margin-bottom: 6px;

   /*add an image to your button*/
 
   /*set width and height for the button*/
   width:80px;
   height: 40px;
}

button.back{
    /*These lines override the previous styling of buttons*/
   width:60px;
   height: 30px;
 
   /*These lines position the back button inside the header*/
   position:absolute;
   left:16px;
   top:8px; 
}

ul{
  list-style-type: square; 
  list-style-poistion: outside;
  margin: 5px;
  padding: 10px;
}

li{
  padding: 5px;
  margin-left: 35px;
}