body {
  background-color: #cecece;
  color: #191919;
  font-family: Arial;
  
  padding: 0;
  margin: 0;
  display: block;
  }
a {
  color: #191919;
  }
/* header css */
div.headers {
  position:fixed;
  }
div.header {
  text-align: center;
  width:100%;
  color:#e3e3e3;
  background-color: #292929;
  text-decoration: none;
  padding-top: 10px;
  padding-bottom: 10px;
  top: 0;
  }
a.header, a.header:visited {
  color:#e3e3e3;
  text-decoration: none;
  }
.headers + .main {
  padding-top: 70px;
  }
/* main */
div.main {
  margin-left: 5%;
  margin-right: 5%;
  }
/* headers */
h1,h2,h3,h4,h5,h6 {
  text-align: center;
  }
/* Sentence template */  
.sen {
  font-weight: bold;
  color: red;
  }
/* importance marking */
.i0 {
  text-decoration: underline;
  }
.i1 {
  text-decoration: underline;
  text-decoration-color: red;
  }
.i2 {
  text-decoration: underline;
  text-decoration-color: orange;
  }
.i3 {
  text-decoration: underline;
  text-decoration-color: yellow;
  }
.i4 {
  text-decoration: underline;
  text-decoration-color: cyan;
  }
.i5 {
  text-decoration: underline;
  text-decoration-color: blue;
  }
.i6 {
  text-decoration: underline;
  text-decoration-color: purple;
  }
/* table of contents */
.toc {
  text-decoration: none;
  display:block;
  text-align: center;
  margin-left: auto;
  margin-right: auto;
  }
a.toc {
  text-decoration: none;
  color: #191919;
  }
.ls {border-collapse:collapse;border-spacing:0;border-style:solid;text-align:center;margin-left:auto;margin-right:auto;}
.th {background-color:#333333;color:#ffffff;border-color:black;border-style:solid;border-width:1px;font-size:14px;font-weight:bold;overflow:hidden;padding:10px 5px;word-break:normal;}
.td {border-color:black;border-style:solid;border-width:1px;font-size:14px;overflow:hidden;padding:10px 5px;word-break:normal;text-align:center;background-color:#c0c0c0;}