body {
  padding: 0;
  margin: 0;
  background: linear-gradient(to right, #363636, #a3a3a3);
  overflow-x:hidden;
}

.left .right {  
  position: relative;
}


.abTitle h1{
  color: white;
  text-align: center;
  font-family: 'Segoe UI', sans-serif;
  font-style: bolder;
  font-size: 40px;
}

.left h1 {
  color: rgb(0, 0, 0);
  margin: 0;
  position: absolute;
  top: 20%;
  left: 50%;
  -ms-transform: translate(-50%, -50%);
  transform: translate(-50%, -50%);
  object-fit: cover;
}

.right h1 {
  color: rgb(0, 0, 0);
  margin: 0;
  position: absolute;
  top: 53%;
  left: 50%;
  -ms-transform: translate(-50%, -50%);
  transform: translate(-50%, -50%);
  object-fit: cover;
}

.left h2 {
  margin: 0;
  font-size: 250%;
  position: absolute;
  top: 36%;
  left: 50%;
  -ms-transform: translate(-50%, -50%);
  transform: translate(-50%, -50%);
  object-fit: cover;
}

.right h2 {
  margin: 0;
  font-size: 250%;
  position: absolute;
  top: 69%;
  left: 49%;
  -ms-transform: translate(-50%, -50%);
  transform: translate(-50%, -50%);
  object-fit: cover;
}

.left a, .right a {
  color: rgb(200, 0, 0);
}

ul {
  list-style-type: none;
  margin: 0;
  padding: 0;
  overflow: hidden;
  margin: auto;

}

li {
  float: left;
  margin: auto;
  border: 3px solid #000000;
  background-color: rgb(58, 58, 58);
}

li a, .dropbtn {
  display: inline-block;
  color: white;
  text-align: center;
  padding: 14px 16px;
  text-decoration: none;
}

li a:hover, .dropdown:hover .dropbtn {
  background-color: rgb(68, 68, 68);
}

li.dropdown {
  display: inline-block;
}

.dropdown-content {
  display: none;
  position: absolute;
  background-color: rgb(116, 116, 116);
  min-width: 160px;
  box-shadow: 0px 8px 16px 0px rgba(0,0,0,0.2);
  z-index: 1;
}

.dropdown-content a {
  color: black;
  padding: 12px 16px;
  text-decoration: none;
  display: block;
  text-align: left;
  margin: auto;
  border: 2px solid #000000;
}

.dropdown-content a:hover {
  background-color: rgb(133, 133, 133);
}

.dropdown:hover .dropdown-content {
  display: block;
}

button {
  position: relative;
  left: 30%;
  display: inline-block;
  font-size: 2rem;
  cursor: pointer;
  border: 1px solid rgb(0, 0, 0);
  outline: none;
  background-color: rgb(100, 100, 100);
  border-radius: 5px;
}

button:hover {
  background-color: rgb(44, 44, 44);
}

button:active {
  background-color: rgb(44, 44, 44);
  transform: translateY(5px);
}

input {
  position: relative;
  left: 30%;
  display: inline-block;
  font-size: 2rem;
  border: 1px solid rgb(0, 0, 0);
  outline: none;
  background-color: rgb(100, 100, 100);
  border-radius: 5px;
}

.result h2 {
  color: rgb(0, 0, 0);
  position: fixed;
  left: 30%;
}

.TitlePrograms h1 {
  position: relative;
  left: 20%;
  color: white;
  font-family: 'Segoe UI', sans-serif;
  font-style: bolder;
  font-size: 50px;
}

.result {
  position: relative;
  left: 21%;
  display: inline-block;
  cursor: pointer;
}

.result .popuptext {
  visibility: hidden;
  width: 160px;
  background-color: rgb(58, 58, 58);
  color: #fff;
  text-align: center;
  border-radius: 6px;
  padding: 8px 0;
  position: absolute;
  z-index: 1;
  bottom: 125%;
  left: 50%;
  margin-left: -80px;
}

.result .popuptext::after {
  content: "";
  position: absolute;
  top: 100%;
  left: 50%;
  margin-left: -5px;
  border-width: 5px;
  border-style: solid;
  border-color: rgb(58, 58, 58) transparent transparent transparent
}
.result .show {
  visibility: visible;
  animation: fadeIn 1s;
  animation: fadeOut 3s

}

@keyframes fadeIn {
  from {opacity: 0;}
  to {opacity:1 ;}
}

@keyframes fadeOut {
  from {opacity: 1;}
  to {opacity:0 ;}
}

.XC2x2 p {
  position: fixed;
  font-size: 2rem;
  top: 278px;
  left: 790px;
  color: rgb(0, 0, 0);
}

.UC2x2 p {
  position: fixed;
  font-size: 2rem;
  top: 278px;
  left: 940px;
  color: rgb(0, 0, 0);
}

.XC3x3 p {
  position: fixed;
  font-size: 2rem;
  top: 335px;
  left: 888px;
  color: rgb(0, 0, 0);
}

.UC3x3 p {
  position: fixed;
  font-size: 2rem;
  top: 335px;
  left: 1036px;
  color: rgb(0, 0, 0);
}

.DDU1 select {
  position: fixed;
  font-size: 1.5rem;
  top: 255px;
  left: 700px;
}

.DDU1R select {
  position: fixed;
  font-size: 1.5rem;
  top: 255px;
  left: 850px;
}

.DDU2 select {
  position: fixed;
  font-size: 1.5rem;
  top: 425px;
  left: 700px;
}

.DDU2R select {
  position: fixed;
  font-size: 1.5rem;
  top: 425px;
  left: 850px;
}

.DDU3 select {
  position: fixed;
  font-size: 1.5rem;
  top: 600px;
  left: 700px;
}

.DDU3R select {
  position: fixed;
  font-size: 1.5rem;
  top: 600px;
  left: 850px;
}


.UEQ1 p {
  position: fixed;
  font-size: 2rem;
  top: 220px;
  left: 790px;
  color: rgb(0, 0, 0);
}

.UEQ2 p {
  position: fixed;
  font-size: 2rem;
  top: 390px;
  left: 790px;
  color: rgb(0, 0, 0);
}

.UEQ3 p {
  position: fixed;
  font-size: 2rem;
  top: 565px;
  left: 790px;
  color: rgb(0, 0, 0);
}

.CALC1 button {
  top: -70px;
  left: 400px;
}

.CALC2 button {
  top: -70px;
  left: 400px;
}

.CALC3 button {
  top: -70px;
  left: 400px;
}

.result .REQ1 h2 {
  color: rgb(0, 0, 0);
  top: 230px;
  left: 950px;
}

.result .REQ2 h2 {
  color: rgb(0, 0, 0);
  top: 400px;
  left: 950px;
}

.result .REQ3 h2 {
  color: rgb(0, 0, 0);
  top: 575px;
  left: 950px;
}

.CALC_SIN button {
  top: 10px;
  left: 575px;
}

.CALC_COS button {
  top: 10px;
  left: 575px;
}

.CALC_TAN button {
  top: 10px;
  left: 575px;
}

.result .R_SIN h2 {
  color: rgb(0, 0, 0);
  top: 230px;
  left: 750px;
}

.result .R_COS h2 {
  color: rgb(0, 0, 0);
  top: 400px;
  left: 750px;
}

.result .R_TAN h2 {
  color: rgb(0, 0, 0);
  top: 575px;
  left: 750px;
}

.angle_sin h2 {
  position: fixed;
  font-size: 2rem;
  color: rgb(0, 0, 0);
  top: 180px;
  left: 690px;
}

.angle_cos h2 {
  position: fixed;
  font-size: 2rem;
  color: rgb(0, 0, 0);
  top: 360px;
  left: 690px;
}

.angle_tan h2 {
  position: fixed;
  font-size: 2rem;
  color: rgb(0, 0, 0);
  top: 540px;
  left: 690px;
}

.DDM select {
  position: fixed;
  font-size: 1.5rem;
  top: 255px;
  left: 700px;
}

.DDT select {
  position: fixed;
  font-size: 1.5rem;
  top: 255px;
  left: 800px;
}

.DIV p {
  position: fixed;
  font-size: 2rem;
  top: 220px;
  left: 780px;
  color: rgb(0, 0, 0);
}

.U_CV p {
  position: fixed;
  font-size: 2rem;
  top: 220px;
  left: 890px;
  color: rgb(0, 0, 0);
}

.DDMR select {
  position: fixed;
  font-size: 1.5rem;
  top: 255px;
  left: 950px;
}

.DDTR select {
  position: fixed;
  font-size: 1.5rem;
  top: 255px;
  left: 1050px;
}

.DIVR p {
  position: fixed;
  font-size: 2rem;
  top: 220px;
  left: 1030px;
  color: rgb(0, 0, 0);
}

.DDV select {
  position: fixed;
  font-size: 1.5rem;
  top: 227px;
  left: 1000px;
}