body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  background-color: lightgrey;

}

.topnav {
  overflow: hidden;
  position: fixed;
  top: 0;
  background-color: #333;
  width: 100%;
  z-index: 1;
  height: 45px;
  overflow-x: hidden;
  box-shadow: 1px 1px 1px 1px darkgray;
}

.topnav .logo {
  overflow: hidden;
  width: 195px;
  height: 45px;
  padding-top: 0px;
  padding-left: 0px;
  padding-right: 0px;
  background-color: darkorange;
  text-align: center;
  color: black;
  font-family: 'Franklin Gothic Medium', 'Arial Narrow', Arial, sans-serif;
  font-size: 20px;
  font-weight: bold;
  vertical-align: auto;
  z-index: 2;
}

.topnav .topNavMenu {
  overflow: hidden;
  width: 197px;
  height: 45px;
  padding-top: 0px;
  padding-left: 0px;
  padding-right: 0px;
  background-color: black;
  text-align: center;
  color: white;
  font-family: 'Franklin Gothic Medium', 'Arial Narrow', Arial, sans-serif;
  font-size: 20px;
  font-weight: bold;
  z-index: 2;
}






.content {
  font-size: 12px;
  float: top;
  position: relative;
  text-align: left;
  overflow: hidden;
  margin: 10px;
  width: auto;
  height: 100%;
  background-color: white;
  box-shadow: 1px 1px 1px 1px darkgrey;
  padding: 10px;
  margin-left: 205px;
  line-height: 1.15;

}

.content a {
  font-size: inherit;
  text-decoration: none;
}

.content_sub {
  float: auto;
  position: relative;
  text-align: left;
  overflow-x: scroll;
  scroll-behavior: auto;
  margin: 10px;
  width: auto;
  height: auto;
  background-color: white;
  box-shadow: 1px 1px 1px 1px darkgrey;
  padding: 20px;
  line-height: 1.5;
}


.toc {

  float: auto;
  position: relative;
  text-align: left;
  overflow: hidden;
  margin: 10px;
  width: auto;
  height: auto;
  background-color: white;
  box-shadow: 1px 1px 1px 1px darkgrey;
  padding: 20px;
  margin-left: 205px;
  font-size: 10px;
}

.toc a {
  font-size: inherit;
  text-decoration: none;
  font-weight: bold;
}

.content_sub h2 {
  text-align: center;
  padding-top: 10px;

}

.img_50 {
  margin-right: 5px;
  width: 50%;
  border: solid;
  float: left;
}

.img_25 {
  margin-right: 5px;
  width: 20%;
  border: solid;
  float: left;
}

.img_95 {
  margin-left: 0%;
  width: 98%;
  float: left;
}

.img_100 {
  margin-right: 5px;
  width: 100%;
  border: solid;
}

.content_sub a {
  font-size: inherit;
  text-decoration: none;
  font-weight: bold;
}

.content_sub a:hover {
  text-decoration: underline;
}

.content_sub ul {
  text-decoration: none;
}

.main_content {
  margin-top: 55px;
  position: relative;

}



.sidenav {
  height: 100%;
  top: 45px;
  width: 197px;
  position: fixed;
  z-index: 1;
  left: 0;
  background-color: #333;
  color: white;
  box-shadow: 2px 2px 2px 2px darkgrey;
  z-index: 3;
  word-wrap: break-word;
  overflow-y: scroll;
  overflow-x: hidden;
}

.sidenav::-webkit-scrollbar {
  width: 12px;
}

.sidenav a {
  text-decoration: none;
  color: white;
}


.subnav {
  width: 197px;
  padding: 2px;
  color: white;
  background-color: #333;
  border-left: solid #333;
}

.subnav:hover {
  color: darkorange;
  border-left: solid darkorange;

}

.subnav a:hover {

  color: darkorange;


}

.topnavMobile {
  color: white;
  background-color: #333;
  position: fixed;
  width: 50px;
  height: 45px;
  top: 0;
  z-index: 1;
  text-align: center;
  line-height: 45px;
  visibility: hidden;

}

.topnavMobile a {
  text-decoration: none;
  color: white;
}

.topnavMobile a:hover {
  text-decoration: none;
  color: orange;
}

.topNavMobileDiv {
  position: relative;
  top: 45px;
  width: 100%;
  background-color: #333;
  color: darkorange;
  text-align: left;
  visibility: hidden;
  height: 0;

}

.topNavMobileDiv a {
  text-decoration: none;
  color: white;
  left: 25px;
}

.topNavMobileDiv a:hover {
  text-decoration: none;
  background-color: #333;
  color: darkorange;
}

.mobileMenuSubDiv {
  width: 100%;
  background-color: #333;
  color: darkorange;
  margin-top: 1px;
  padding-left: 2px;
  text-align: left;
  border-left: solid #333;
  border-left: solid #333;
}

.mobileMenuSubDiv:hover {
  border-left: solid darkorange;
}

.mobileMenuSubDiv a:hover {
  color: darkorange;

}

.video_yt {
  border: #333 1px;
  width: 50%;
  height: 320px;
  float: left;
  position: relative;
  padding-right: 5px;
  padding-bottom: 5px;

}

@media screen and (max-width: 800px) {
  .video_yt {
    border: #333 1px;
    width: 100%;
    height: 320px;
    float: left;
  }
}

@media screen and (max-width: 10000px) {

  .topnav .logo {
    width: 100%;
    vertical-align: auto;
  }

  .topnav a {
    padding: 13px 0px;
    margin-left: 20px;
  }

  .sidenav {
    width: 0px;
    height: 0px;
    position: relative;
    background-color: #333;
    box-shadow: 0px 0px 0px 0px darkgrey;
    color: lightgrey;
    visibility: hidden;
    display: none;
  }

  .sidenav a {
    float: left;
    background-color: lightgrey;
    border: black;
    color: lightgrey;
    visibility: hidden;
    display: none;
  }

  .main_content {
    margin-left: 5px;
  }

  .content {
    margin-left: 0px;
  }

  .content_sub {
    margin-left: 0px;
  }

  .toc {
    margin-left: 0px;
  }

  .img_50 {
    margin-right: 5px;
    width: 50%;
    border: solid;
  }

  .topnavMobile {
    visibility: visible;
  }

  .topNavMobileDiv {
    position: relative;
    top: 45px;
    width: 100%;
    background-color: #333;
    color: darkorange;
    text-align: center;
    visibility: visible;
    height: auto;

    overflow-x: hidden;
    z-index: 0;
  }

}

.code {
  font-family: 'Courier New', Courier, monospace;
  font-size: 10px;
  font-weight: bold;
  border: #333;
  border-style: solid;
  padding: 2px;
  background-color: lightgray;
  margin: 5px;
  overflow-wrap: break-word;
}

.quote {
  font-family: 'Arial';
  font-size: 14px;
  font-style: italic;
  border: #333;
  border-style: solid;
  padding: 2px;
  background-color: lightgray;
  margin: 5px;
}

span.inline_code {
  font-family: 'Courier New', Courier, monospace;
  font-size: 10px;
  font-weight: bold;
  border: #333;
  border-style: solid;
  padding-top: 2px;
  padding-bottom: 1px;
  padding-left: 1px;
  padding-right: 1px;
  background-color: lightgray;

}

img.logo_img {
  max-height: 100%;
  max-width: 100%;
  margin-left: 25px;
  border: solid #333;
}

.summary_table {
  font-family: Arial, Helvetica, sans-serif;
  border-collapse: collapse;
  font-size: small;
}

.summary_table th {
  border: 1px solid #ddd;
  padding: 5px;
  text-align: center;
}

.summary_table td {
  border: 1px solid #ddd;
  padding: 5px;
}

.summary_table tr:nth-child(even) {
  background-color: #f2f2f2;
}

.summary_table tr:hover {
  background-color: #ddd;
}

.summary_table th {
  padding-top: 12px;
  padding-bottom: 12px;
  text-align: left;
  background-color: #333;
  color: white;
  overflow-x: scroll;
  font-size: small;
}

img.bookListIcon {
  width: 100%;
  border: solid #333;
}

.contact_input_form {
  width: 98%; 
  border: solid 1px;
  padding: 5px;
  display: table; 
}

.contact_input_form p {
  display: table-row; 
}

.contact_input_form label {
  width: 200px;
  display: table-cell;
}

.contact_input_form input {
  margin-left: 5px;
  border: none;
  border-bottom: #333 solid 1px;
  padding: 5px;
  display: table-cell;
  width: 95%;
}



.input_textarea {
  width: 97%;
  resize: vertical;
  height: 100px;
}