.bg-dark {
     background-color: #2b4162;
     background-image: linear-gradient(315deg, #2b4162 0%, #12100e 74%);
 }

 .frame {
     min-height: 275px;

     /* background-color :#e7eff9;
background-image: linear-gradient(315deg, #e7eff9 0%, #cfd6e6 74%); */
     /* background-color: #6a93cb;
background-image: linear-gradient(315deg, #6a93cb 0%, #a4bfef 74%); */
     background-color: #537895;
     background-image: linear-gradient(315deg, #537895 0%, #09203f 74%);
     /* background-color: #4c4177;
background-image: linear-gradient(315deg, #4c4177 0%, #2a5470 74%); */
     /* background-color: #000000;
background-image: linear-gradient(147deg, #000000 0%, #434343 74%); 
/* background-color: #000000;
background-image: linear-gradient(147deg, #000000 0%, #2c3e50 74%); */
     margin-bottom: 15px;

 }

 .dropdown,
 .dropleft,
 .dropright,
 .dropup {
     border-right: 1px dotted #a0a5a7;
     min-width: 50px;
 }

 .iframe,.oframe {
     min-widthx: 800px;
 }
 
 .navbar {
     min-widthx: 800px;
     border-bottom: 1px solid #ecf0f1;
     background-color: transparent !important;

 }


 
 .dropdown-menu {
     max-width: 250px;
     max-height: 245px;
     overflow: auto;
     box-shadow: 0 2px 4px 0 rgba(0, 0, 0, .2);

 }

 .output {
     -moz-appearance: textfield-multiline;
     -webkit-appearance: textarea;

     /* height: 30px; */
     box-shadow: inset 0px 1px 2px #666;
     overflow: auto;
 }

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

 ::-webkit-scrollbar-track {
     -webkit-box-shadow: inset 0 0 6px rgba(200, 200, 200, 1);
     border-radius: 10px;
 }

 ::-webkit-scrollbar-thumb {
     border-radius: 10px;
     background-color: #fff;
     -webkit-box-shadow: inset 0 0 6px rgba(90, 90, 90, 0.7);
 }

 .navbar-dark .navbar-nav .nav-link {
     color: white;
 }

 .dropdown-divider {

     border-top: 1px solid #3f3f3f !important;
 }

 .bg-white {
     /* background-color: #000000;
background-image: linear-gradient(147deg, #000000 0%, #434343 74%); */
     /*background-color: #637081;
background-image: linear-gradient(315deg, #637081 0%, #7c98b3 74%); */
     /* background-color: #5b6467;
background-image: linear-gradient(315deg, #5b6467 0%, #8b939a 74%); */
     /* background: linear-gradient(to top, #09203f 0%, #6f9abc 100%);  */
     /* background:radial-gradient(at right center, rgba(9, 33, 63, 1.0), rgba(112, 155, 188, 1.0))  */
     /* background: conic-gradient(from 315deg, rgba(9, 33, 63, 1.0), rgba(112, 155, 188, 1.0)); */
     background: radial-gradient(at right center, rgba(9, 33, 63, 1.0), rgb(93 145 186));

 }

 .navmenufont {

     font-size: 18pt;
     min-width: 60px;
     padding-top: 12px;

 }

 .borderstyle {
     border-bottom: 1px solid #dbdbdb;
 }

 .borderstyle:last-child {
     border-bottom: 0px;
 }

 /* .borderstyle:nth-last-child(2){
    border-bottom: 0px;
} */


 .menugrd {
     background-image: linear-gradient(to right, #3a7bd5 0%, #3a6073 51%, #3a7bd5 100%);
     margin: 4px;
     padding: 15px 5px;
     text-align: center;
     text-transform: uppercase;
     transition: 0.5s;
     background-size: 200% auto;

 }

 .menugrd:hover {
     background-position: right center;
     /* change the direction of the change here */
     color: black;
     text-decoration: none;
 }

 .dropdown-item {
     color: white !important;
     font-size: 20px !important;
 }

 .dropdown-item:hover {
     color: #3090ff !important;

 }

 .dropdown-item:last-child {
     box-shadow: none !important;
 }

 .bg-custom {
     /* background-image:linear-gradient(to right, #141E30 0%, #243B55  51%, #141E30  100%) !important; */
     background-image: linear-gradient(to top, #09203f 0%, #537895 100%)
 }

 .greekmath {
     text-wrap: wrap;
     min-width: 225px;
 }

 .greekmathanchor {
     display: inline !important;
     border-bottom: 1px solid #dbdbdb !important
 }

 .greekmathanchor mi {
     padding-bottom: 11px;
 }

 .btnpopup {
     /* background: radial-gradient(at right center, rgba(9, 33, 63, 1.0), rgb(93 145 186)) !important; */
     background-color: #213c54 !important;
     border-color: #ffffff !important;
 }

 .btnpopup:hover {
     background: linear-gradient(270deg, #09213F, #709BBC) !important;
 }

 .modallabel {
     color: #1c678c;
     font-family: math;
 }

 img.logo {
     cursor: pointer;
     width: 70px;
 }

 .screen_shot {
     max-width: 400px;
 }

 .msword {
     padding: 1em;
 }

 .katex_div {
     display: none;
 }

 #katex_display {
     margin-left: 1em;
     padding: 1em;
 }

 #insmath {
     display: none;
 }

 .output {
     font-size: 20pt !important;
 }


 .misc-buttons * {
     background-color: #224488 !important;
     color: white !important;
     vertical-align: baseline;
 }
 
 .misc-buttons button:hover {
     background-color: #3355aa !important;
     color: white !important;
 }

 nav math * {
     color: white !important;
 }

 div.output {
     min-width: 5em;
     margin-bottom: 1em;
 }

 div.keywords {
     display: none;
 }

 #nextmath, #prevmath {
     font-size: 24pt;
 }

 #mathid {
     max-width: 4em;
 }
 
 @media only screen and (max-device-width: 600px) {
     .katex_div {
         display: block;
     }

     body>.editor {
         display: none;
     }
 }

 

label.label input[type="file"] {
  position: absolute;
  top: -1000px;
}
.label {
  cursor: pointer;
  border: 1px solid #cccccc;
  border-radius: 5px;
  padding: 5px 15px;
  margin: 5px;
  background: #dddddd;
  display: inline-block;
}
.label:hover {
  background: #5cbd95;
}
.label:active {
  background: #9fa1a0;
}
.label:invalid+span {
  color: #000000;
}
.label:valid+span {
  color: #ffffff;
}

#solution_text {
    padding: 1em !important;
}

textarea {
    width: 90%;
    height: 100px;
}