header .pageTitle {
  position: absolute;
  top: 20px;
  left: 548px;
  display: none;
  width: 100%;
  height: 28px;
  font-size: 1em;
  font-weight: bold;
  color: #fff;
  text-align: left;
}

.CourseTitle-TT {
  top: 80px;
  display: none;
}

.PageTitle-TT {
  position: absolute;
  top: 40px;
  left: 96px;
  width: auto;
  padding-left: 6px;
  font-size: 1.5em;
  color: black;
}

.CourseTitle-TT::before,
.PageTitle-TT::before {
  position: absolute;
  width: 0;
  height: 0;
  content: "";
  border-width: 0 7.5px 10px 7.5px;
}

.CourseTitle-TT::before {
  top: -10px;
  left: 90px;
}

.PageTitle-TT::before {
  top: -10px;
  left: 457px;
}

.courseTitle {
  position: absolute;
  top: 6px;
  left: 96px;
  width: 610px;
  height: auto;
  padding-left: 6px;
  font-size: 2em;
  font-weight: bold;
  color: #20883e;
}

.moduleTitle {
  position: absolute;
  top: 39px;
  left: 80px;
  display: none;
  width: 620px;
  height: 28px;
  font-size: 1em;
  font-weight: bold;
  color: #fff;
  text-transform: none;
}

header.main {
  position: relative;
  top: 0;
  z-index: 20000;
  width: 100%;
  height: 77px;
  border-bottom: 2px solid #666;
}

.chapterNumber {
  position: absolute;
  left: 0;
  float: left;
  width: 10px;
  height: 10px;
}

.ChapterText {
  position: absolute;
  width: 100%;
  height: auto;
  margin-top: 2px;
  font-size: 0.563em;
  color: white;
  text-align: center;
}

.ChapterNum {
  position: absolute;
  width: 100%;
  height: auto;
  margin-top: 12px;
  font-size: 1.125em;
  color: white;
  text-align: center;
}

#calcyIcon {
  position: absolute;
  top: 0;
  right: 74px;
  width: 66px;
  height: 78px;
  cursor: pointer;
  background-image: url(../images/calc.svg);
  background-repeat: no-repeat;
  background-position-x: 10px;

  /* background-size: 100% 100%; */
}

#periodicTableIcon {
  position: absolute;
  top: 0;
  right: 2px;
  width: 56px;
  height: 78px;
  cursor: pointer;
  background-image: url(../images/pt.svg);
  background-repeat: no-repeat;

  /* background-size: 100% 100%; */
}

#calc {
  position: absolute;
  top: 137px;
  left: 326px;
  z-index: 1;
  display: none;
  width: 146px;
  height: 226px;
  border: transparent;
}

/* #periodicTable {
  position: absolute;
  top: 79px;
  left: 10px;
  z-index: 1;
  display: none;
  width: 1024px;
  height: 614px;
  background-color: white;
  border: transparent;
} */

#menu_Icon {
  position: absolute;
  top: 2px;
  left: 516px;
  display: none;
  width: 28px;
  height: 28px;
  cursor: pointer;
  background-image: url(../images/menu.svg);
  background-repeat: no-repeat;
  background-size: 100% 100%;
}

#resource_Icon {
  position: absolute;
  top: 2px;
  left: 426px;
  display: none;
  width: 28px;
  height: 28px;
  cursor: pointer;
  background-image: url(../images/resources.svg);
  background-repeat: no-repeat;
  background-size: 100% 100%;
}

#gadgetsButn.lines-button {
  position: absolute;
  top: 0;
  left: 0;
  width: 84px;
  height: 78px;
  cursor: pointer;
  background-color: #20883e;
  background-repeat: no-repeat;
  background-position: center;
  background-size: 50% 30%;
}