body { background-color: white;
       color: black;
       font-family: Arial, Helvetica, sans-serif;
       font-size: medium;
       font-weight: normal;
     }

ins { /*margin: 0 1em 0 1em;*/
      font-weight: bolder;
      text-decoration: none;
    }

h1 { text-align: center; 
     margin-bottom: 0}

p { text-align: justify; }

a { color: blue;
    background-color: white;
  }

code a { font-family: Courier, fixed-width; }

acronym { cursor: help; }

pre { background-color: #EEE;
      color: black;
      margin: 0 3em 0 3em; }

a:visited { color: purple;
            background-color: white;
}

a:hover { color: red;
          background-color: white;
}

a:active { color: red;
           background-color: white;
           text-decoration: none;}

.foot { font-size: smaller; }

img { vertical-align: middle;
      border-style: none;
    }

.invisible { color: white;
             background-color: white;
             font-size: 0%;
           }

#questions a { /* fake href */
           text-decoration: underline;
           cursor: pointer;
           }