@charset "UTF-8";
   :root {
  --bg: #171a1c;
  --panel: #262c2f;
  --menu: #282828;
  --border: #1a1a1a;
  --text: #e4e7ea;
  --heading: #e6e6e6;
  --link: #389cff;
  --link-hover: #20a8d8;
  --tree-line: #8d8d8d;
  --toggle-bg: #171a1c; /* box with plus sign background color*/
  --toggle-border: #fff;
  --toggle-text: #fff;
  --toggle-size: 18px; /* box with plus sign box size*/
  --toggle-gap: 5px; /* space between nav link and connector line*/
}

html,
body {
  background-color: var(--bg);
  color: var(--text);
  font-family: "Segoe UI", "Helvetica Neue", Helvetica, Arial, "Noto Sans", sans-serif;
  font-size: 0.98rem;
  margin: 0;
}

a {
  color: var(--link);
  text-decoration: none;
}

a:hover,
.left_nav_list label:hover {
  color: var(--text);
}

h1 { font-size: 130%; }
h2 { font-size: 120%; }
h3 { font-size: 115%; }
h4 { font-size: 110%; }

h1, h2, h3, h4, h5, h6 {
  color: var(--heading);
  display: inline;
}

.wrapper {
  width: 100%;
}

.crumb {
  background-color: var(--panel);
  border-bottom: 1px solid var(--border);
  color: var(--text);
  margin: 0;
  padding: 10px 10px 10px 25px;
}

.crumb a {
  color: var(--text);
  margin-right: 8px;
}

.crumb a:hover {
  color: var(--link-hover);
}

.left_nav_div,
.main {
  box-sizing: border-box;
  float: left;
}

.left_nav_div {
  padding: 0 30px 5px 10px;
  width: 25%;
}

.main {
  background-color: var(--bg);
  border: 1px solid var(--border);
  margin-top: 25px;
  padding: 0 15px 15px 20px;
  width: 700px;
}

.menubar {
  align-items: center;
  background: var(--menu);
  border-bottom: 1px solid #222;
  box-sizing: border-box;
  color: #fff;
  display: flex;
  font-size: 80%;
  height: 20px;
  padding: 0 10px;
  width: 70px;
}

#menu-toggle,
.left_nav_list input[type="checkbox"] {
  display: none;
}

.toggle-btn,
.left_nav_list label {
  cursor: pointer;
}

#menu-toggle:checked ~ .left_nav_links {
  display: none;
}

.left_nav_links {
  margin-top: 10px;
}

.left_nav_list,
.left_nav_sub_list {
  list-style: none;
  margin: 2px;/* sub menu move entire sub nav with line connector*/
  padding-left: 6px;/* sub menu move entire sub nav with line connector*/
  position: relative;
}

.left_nav_sub_list {
  display: none;
  margin-left: 22px;
  padding-left: 14px;
}

.left_nav_list input[type="checkbox"]:checked + label + .left_nav_sub_list {
  display: block;
}

.left_nav_list li,
.left_nav_sub_list li {
  padding-left: 6px;
  padding-top: 6px; /* spacing  between links*/
  position: relative;
}

.left_nav_list li::before,
.left_nav_sub_list li::before {
  background: var(--tree-line);
  content: "";
  height: 100%;
  left: 8px;
  position: absolute;
  top: 0;
  width: 1px;
}

.left_nav_list li::after,
.left_nav_sub_list li::after {
  background: var(--tree-line);
  content: "";
  height: 1px;
  left: 8px;
  position: absolute;
  top: 13px;
  width: 12px;
}

.left_nav_list li:last-child::before,
.left_nav_sub_list li:last-child::before {
  height: 14px;
}

.left_nav_list a,
.left_nav_list label {
  align-items: center;
  color: var(--link);
  display: inline-flex;
  gap: var(--toggle-gap);
  padding-left: 0;
  position: relative;
  z-index: 1;
}

/* Reserve the same space for regular links so all text aligns. */
.left_nav_list a::before {
  background: transparent;
  content: "";
  display: inline-block;
  flex: 0 0 var(--toggle-size);
  height: var(--toggle-size);
  width: var(--toggle-size);
}

/* Solid toggle box: only submenu labels get the visible plus/minus box. */
.left_nav_list label .nav_menu_box {
  background-color: var(--toggle-bg);
  border: 1px solid var(--toggle-border);
  box-sizing: border-box;
  color: var(--toggle-text);
  display: inline-block;
  flex: 0 0 var(--toggle-size);
  font-size: 12px;
  height: var(--toggle-size);
  line-height: calc(var(--toggle-size) - 2px);
  opacity: 1;
  position: relative;
  text-align: center;
  width: var(--toggle-size);
  z-index: 2;
}

.left_nav_list label .nav_menu_box::before {
  content: "+";
  font-size: 16px;
  font-weight: bold;
}

.left_nav_list input[type="checkbox"]:checked + label .nav_menu_box::before {
  content: "−";
  font-size: 16px;
  font-weight: bold;
}

/*end left nav  */

/* start topic_menu_tree */
ul.topic_menu_tree,
ul.topic_menu_tree ul {
  list-style: none;
  margin: 0;
  padding: 0;
  font-weight: bold;
}

ul.topic_menu_tree {
  padding-left: 16px;
}

ul.topic_menu_tree ul {
  margin-left: 8px;
  padding-left: 28px;
  border-left: 1px solid #a1a1a1;
}

ul.topic_menu_tree li {
  position: relative;
  padding-left: 2px; /* change how far text link is next to line on left */
  margin: 0;
  padding-bottom: 6px;
}

/* horizontal connector lines */
ul.topic_menu_tree li::before {
  content: "";
  position: absolute;
  top: 0.75em;
  left: -28px;
  width: 18px; /* change line length */
  height: 1px;
  background: #a1a1a1;
}

/* remove root connector if desired */
ul.topic_menu_tree > li::before {
  left: -18px;
  width: 18px;
}

/* stop vertical line after the last item */
ul.topic_menu_tree ul li:last-child::after {
  content: "";
  position: absolute;
  left: -29px;
  top: calc(0.75em + 1px);
  width: 1px;
  height: 100%;
  background: #171a1c;
}

/* end topic_menu_tree */

.foot { 
    float: left;
    padding: 0px 15px 15px 20px;
    width: 100%;
  }


/* start auio player styles */
.audio_single { /* was previously button_text */
  background-color: #20a8d8; 
  border: 1px solid #0f7194; 
  border-radius: 3px;
  color: white;
  padding-top: 4px;
  padding-right: 9px;
  padding-bottom: 4px;
  padding-left: 9px;
  margin: 5px;
  margin-left: 0px;
  margin-right: 0px;
  text-align: center;
  text-decoration: none;
  display: inline-block;
  font-size: 100%;
}

.audio_single:hover {
  background-color: rgb(216, 216, 216); 
  color: #425b74;
  border: 1px solid rgb(161, 161, 161); 
  box-shadow: 3px 3px 5px #b3b3b3;
}

/* start audio rewind play pause forward  */

.audio_control_buttons { /* was previously button_phrases*/
  background-color: #20a8d8; 
  border: 1px solid #0f7194; 
  border-radius: 3px;
  color: white;
  padding-top: 4px;
  padding-right: 9px;
  padding-bottom: 4px;
  padding-left: 9px;
  margin: 5px;
  margin-left: 0px;
  margin-right: 0px;
  text-align: center;
  text-decoration: none;
  display: inline-block;
  font-size: 100%;
}

.audio_control_buttons:hover {
  background-color: rgb(216, 216, 216); 
  color: #425b74;
  border: 1px solid rgb(161, 161, 161); 
  box-shadow: 3px 3px 5px #b3b3b3;
}

/* end audio rewind play pause forward  */

/* start audio player box  */

.player-container {
    background-color: #303030;
    border: 1px solid #ddd;
    border-radius: 10px;
    display: inline-block;
    padding-top: 0px;
    padding-left: 5px;
    padding-bottom: 10px;
    padding-right: 10px;
    width: 390px;
 }
 
.timeline {
    width: 100%;
    background: #ddd;
    height: 5px;
    border-radius: 5px;
    cursor: pointer;
    margin-top: 20px;
    background: #FFF;
}

.progress {
    width: 0%;
    background: #4CAF50;
    height: 5px;
    border-radius: 5px;
 }
 
.audio_time_line {
    width: 100%;
    background: #FFF;
    height: 5px;
    border-radius: 5px;
 }

.audio_time_row:after {
  content: "";
  display: table;
  clear: both;
  width: 100%;
}

.audio_time_column_l {
  float: left;
  width: 50%;
}

.audio_time_column_r {
  float: left;
  width: 50%;
  text-align: right;
}

.blinking-text {
  color: red;
  font-weight: bold;
  animation: blink 1s infinite;
}

 /* Style all audio control buttons */
  .controls button {
    padding: 8px 14px;
    margin: 2px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 13px;

    /* Unified color scheme */
    background-color: #007bff; /* Blue */
    color: white;
    transition: background-color 0.2s ease, transform 0.1s ease;
  }

  /* Hover and active effects */
  .controls button:hover {
    background-color: #0056b3; /* Darker blue */
  }

  .controls button:active {
    transform: scale(0.97);
  }

@keyframes blink {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0;
  }
}

/* end audio player box  */

/* audio button for test quizz */


.button_test_large {
  background-color: #007acc;
  border: 1px solid #5b84a5; 
   border-radius: 5px;
  color: white;
  padding: 28px 40px;
  margin: 8px;
  text-align: center;
  text-decoration: none;
  font-weight: bold;
  display: inline-block;
  font-size: 160%;
}

.button_test_large:hover {
    background-color: #4e84b1; 
    border: 1px solid #white;
}

.button_show_answer {
  background-color: #000;
  border: 1px solid #eab82e; 
   border-radius: 8px;
  color: #eab82e;
  padding: 15px 20px;
  margin: 5px;
  text-align: center;
  text-decoration: none;
  font-weight: bold;
  display: inline-block;
  font-size: 230%;
}
/* end audio button for test quizz */

/* end auio player styles */

.text-red { color: #f63c3c; }

.text-blue { color: #20a8d8; }

.text-blue2 { color: #20a8d8; }

.text-green { color: #4dbd74; }

.text-green2 { color: #779933; }

.text-yellow { color: #ffc107; }

.text-orange { color: #e69704; }

.text-link { color: #4d94ff; }

.text-grey { color: #aaaaaa; }

.text-dark-grey { color: #535353; }

.text-purple {color: #bb86fc;}

.text-turquoise   {color: #59ac90;}

.text-beige   {color: #ffcda2;}

.text-tan   {color: #d2b48c;}

.text-olive   {color: #94964b;}

.text-brown   {color: #a76e5d;}

.text-rustic   {color: #a05220;}

/****  start media styles for Mobile Media Change the size width etc.. .based on the screen size **/

@media screen and (max-width: 900px) {
  .main { 
      width: 75%;
    }
}

@media screen and (max-width: 736px) {
  .left_nav_div { 
      width: 98%;
      padding: 0px 5px 0px 10px;
      border-bottom: #394247 solid 1px;
    }
}


@media screen and (max-width: 578px) { /****   Media 578px ################### **/
  .main { grid-area: main; 
    width: auto;
  }
  .main { 
      width: 100%;
    }

  .wrapper {
    display: grid;
    grid-template-areas:
      "crumb"
      "left_nav"
      "main"
      "foot";
    grid-gap: 0px;
    padding: 0px;
    height: fit-content;
  }

  .crumb { padding: 5px 10px 5px 15px;}


} /****  End Media 578px ################### **/


@media screen and (max-width: 420px) { /****   Media 420px ################### **/
  .main { grid-area: main; 
    width: 415px;
  }

  .wrapper {
    display: grid;
    grid-template-areas:
      "crumb"
      "left_nav"
      "main"
      "foot";
    grid-gap: 0px;
    padding: 0px;
    height: fit-content;
  }

  .crumb { padding: 5px 10px 5px 15px;}

} /****  End Media 412px ################### **/