*{
    margin: 0;
    padding: 0;
    font-family: 'Poppins', sans-serif;
    box-sizing: border-box;
}
body,html{
    color: #090909;
	background: #ffffff;
	margin: 0;
    padding: 0;
	overflow-x: hidden;
    scroll-behavior: smooth;
}

#openNav {
  width: 35px;
  height: 35px;
  top: 5vh;
  right: 5%;
  border: none;
  outline: none;
  background-color: #00fff0;
  color: #000000;
  cursor: pointer;
  padding: auto;
  border-radius: 50%;
  font-size: 25px;
  z-index: 99;
}

#goToHome {
  display: none;
  width: 35px;
  height: 35px;
  position: fixed;
  top: 15px;
  right: 15px;
  border: none;
  outline: none;
  background-color: #00fff0;
  color: #000000;
  cursor: pointer;
  padding: auto;
  border-radius: 50%;
  font-size: 25px;
  z-index: 99;
}
#goToHome:hover {
  background-color: #00fff0;
  color: #262626;
}
.sidenav {
  height: 100%;
  width: 0;
  position: fixed;
  z-index: 999;
  top: 0;
  right: 0;
  background-color: #262626;
  overflow-x: hidden;
  transition: 1s;
  padding-top: 60px;
  overflow-y: scroll;
  scrollbar-width: none;
  
}
.sidenav>a {
	width: 300px;
}

.sidenav a {
  padding: 5px 8px 5px 32px;
  text-decoration: none;
  font-size: 12px;
  font-weight: 600;
  color: #ffffff;
  display: block;
  transition: 0.1s;
}
.sidenav a:hover {
  color: #ababab;
}
.sidenav .closebtn {
  position: absolute;
  top: 0;
  right: 25px;
  font-size: 30px;
  margin-left: 50px;
}
 .sidenav-subjects {
		width: 150px;
        height: 30px;
       color: #ffffff;
        background: #101010;
        margin: 3px 0 10px 140px;
        font-size: 70%;
        border: none;
        border-radius: 50px;
        cursor: pointer;
        transition: background 0.5s, transform 0.5s;
    }	
	.sidenav-contacts {
		width: 175px;
        height: 25px;
        color: #ababab;
        background: transparent;
        margin: 5px 0 5px 110px;
        font-size: 70%;
        text-align: right;
        border: none;
        border-radius: 50px;
        cursor: pointer;
        transition: background 0.5s, transform 0.5s;
		display: flex;
		align-items: center;
		justify-content: space-between;
		flex-wrap: wrap;
    }
	.sidenav-lines{
		border: 1px solid #101010;
	}
	
	.subsidiary {
		width: 300px;
        height: auto;
		margin: 3vh 0;
	}
	.subsidiary-logo {
		width: 300px;
        height: auto;
        background: #101010;
	}
	
	.subsidiary-logo img {
		padding: 0 24px 0 0;
	}


@media only screen and (min-width: 1024px) {
	
	
.tablet ,.mobile ,.small-screens{
	display: none;
}	

#over{
	    background: rgba(0,0,0,0.8);
		height: auto;
}
#landing{
    width: 100%;
    height: 60vh;
}
#header{
    height: 20vh;
    margin: 0 5%;
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
}
.logo{
    height: auto;
    width: 150px;
    margin-top: 5vh;
}

#header ul{
   margin-top: 5vh;
}

#header ul li {
    display: inline-block;
    list-style: none;
    margin: 10px 15px;
}

#header ul li a {
    color: #ababab;
    text-decoration: none;
    font-size: 12px;
    font-weight: 600;
    position: relative;
}

#header ul li a::after {
    content: '';
    width: 0;
    height: 3px;
    background: #00fff0;
    position: absolute;
    left: 0;
    bottom: -6px;
    transition: 0.5s;
}

#header ul li a:hover {
    color: #00fff0;
}

#header ul li a:hover::after {
    width: 100%;
}

.user{ 
    display: inline-block;
    list-style: none;
    margin: 10px 0;
}

.login{
    margin-top: 5vh;
    width: 100px;
    height: 40px;
    font-size: 12px;
    font-weight: 600;
    border-radius: 50px;
    border: none;
    background: #090909;
    color: #00fff0;
}
.register{
    margin-top: 5vh;
     width: 150px;
    height: 40px;
    font-size: 12px;
    font-weight: 600;
    border-radius: 50px;
    border: 1px solid #00fff0;
   background: #090909;
    color: #00fff0;
	 cursor: pointer;
}
.register:hover{
    color: #090909;
	 background: #00fff0;
}

.background{
    width: 100%;
    height: 60vh;
    background-image: url(../Images/Hero.jpg);
    background-size: cover;
    background-position: center;  
	background-attachment: fixed;	
    animation: breath 30s linear infinite;
}



@keyframes breath {
    0%   { background-size: 100% 100vh; }
    50% { background-size: 125% 125vh; }
    100% { background-size: 100% 100vh; }
  }

.background #hero{
    height: 40vh;
    color: #ffffff;
    display: block;
    padding: 13vh 5% 0 5%;
}

#hero h1{
    font-size: 45px;
}

span{
    color: #00fff0;
}
.span{
    color: #cc5500;
}

.span-2{
    color: #008080;
}

#hero p{
    font-size: 14px;
    margin-top: 2vh;
	color: #ababab;
}

#load-1{
	margin-left: -10%;
	opacity: 0;
	transition-delay: 0.5s;
	transition-duration: 0.75s;
}
#load-2{
	margin-left: -10%;
	opacity: 0;
	transition-delay: 0.65s;
	transition-duration: 0.75s;
}
#load-3{
	margin-left: -10%;
	opacity: 0;
	position: relative;
	z-index: 99;
	transition-delay: 0.8s;
	transition-duration: 0.75s;
}
#load-4{
	margin-left: -10%;
	opacity: 0;
	position: relative;
	transition-delay: 1.5s;
	transition-duration: 0.75s;
}

#load-5{
	transform: translateY(0);
	opacity: 0;
	transition-delay: 0.10s;
	transition-duration: 0.25s;
}
#load-6{
	transform: translateY(0);
	opacity: 0;
	transition-delay: 0.20s;
	transition-duration: 0.25s;
}
#load-7{
	transform: translateY(0);
	opacity: 0;
	transition-delay: 0.30s;
	transition-duration: 0.25s;
}
#load-8{
	transform: translateY(0);
	opacity: 0;
	transition-delay: 0.40s;
	transition-duration: 0.25s;
}
#load-9{
	transform: translateY(0);
	opacity: 0;
	transition-delay: 0.50s;
	transition-duration: 0.25s;
}

.button-fill, .button-no-fill{
    margin: 20px 5px 0 0 ;
    font-size: 12px;
    font-weight: 600;
    width:150px;
    height: 40px;
    border: none;
    border-radius: 50px;
    cursor: pointer;
}

.button-fill{
    color: #000000;
    background: #00fff0;
}
.button-no-fill{
    color: #00fff0;
    border: 1px solid #00fff0;
    background: transparent;
}

/******************************** ABOUT US **********************************************/

#about{
	width: 1000px;
    margin: 5vh auto;
}

.chapter-img{
        width: auto;
        height: 20vh;
        margin: -10vh 0 7vh 0;
		border-radius: 50%;
    }
	
	
.about-img{
    width: 30%;
    height: auto;
	display: none;
}
.heading-2{
    font-size: 15px;
    text-align: center;
    font-weight: lighter;
}

.tab-links{
    margin: 0 5px 0 0 ;
    font-size: 13px;
    font-weight: 600;
    width:190px;
    height: 50px;
    border: none;
    border-radius: 3px;
    cursor: pointer;
    color: #ffffff;
    background: #090909;
	  position: relative;
}
    .tab-links:hover {
        color: #00fff0;
    }
    .tab-links.active-link {
         color: #090909;
    background: #00fff0;
    }
	.tab-contents {
        display: none;
		width: 800px;
		margin: 0 auto;
    }
	.tab-contents .example{
		width: 800px;
		height: auto;
		padding: 5vh 5%;
		margin: 5vh 0;
		background: #090909;
		color: #00fff0;
		border-radius: 5px;
    }

    .tab-contents.active-tab {
        display: block;
    }

.tab-contents h1{
    font-size: 30px;
	margin-bottom: 5vh;

}

.tab-contents h2{
    font-size: 17px;
	margin-bottom: 1vh;
}

.tab-contents p{
    font-size: 13px;
	margin-bottom: 1vh;
}
.tab-contents h3{
    font-size: 12px;
	margin-bottom: 5vh;
}
.tab-contents h5{
    font-size: 12px;
	margin: 1vh 2%;
}
.tab-contents ul li{
    font-size: 12px;
}


.root-normal mroot{
	 font-size: 23px;
	font-weight: 600;
	 color: #090909;
}

.root-fraction mroot{
	 font-size: 35px;
	font-weight: 600;
	 color: #090909;
}

.ex-root-normal mroot{
	 font-size: 23px;
	font-weight: 600;
	 color: #00fff0;
}

.ex-root-fraction mroot{
	 font-size: 40px;
	font-weight: 600;
	 color: #00fff0;
}

mroot mtext{
	 font-size: 14px;
}
mroot mtext .nth-root{
	 font-size: 11px;
	 color: #090909;
}
mroot mtext .ex-nth-root{
	 font-size: 11px;
	 color: #00fff0;
}
mfrac{
	 font-size: 20px;
	 font-weight: 600;
}
h6{
	 font-size: 12px;
	 margin: 2vh 0;
}

.question-example {
	 color: #00fff0;
	 font-weight: 600;
}
.normal-example {
	 color: #090909;
	 font-weight: 600;
}
.completing-square {
	 color: #00fff0;
	 font-weight: 600;
	 font-size: 12px;
}
.normal-exponent-900 {
	 color: #090909;
	 font-weight: 900;
}

.fraction-bracket {
	font-size: 40px;
	 color: #090909;
	 font-weight: 300;
}
.fraction-bracket sup{
	font-size: 11px;
	 color: #090909;
	  font-weight: 900;
}

.ex-fraction-bracket {
	font-size: 40px;
	 color: #00fff0;
	 font-weight: 300;
}
.ex-fraction-bracket sup{
	font-size: 11px;
	 color: #00fff0;
	  font-weight: 900;
}
.tab-contents .bodmas{
    font-size: 13px;
	font-weight: 300;
	color: #090909;
	margin-bottom: 1vh;
}



.the-end{
	display: flex;
	flex-wrap: wrap;
	justify-content: space-between;
	align-items: center;
	margin: 25vh 0;
}
.quiz{
    width:200px;
    height: auto;
	padding: 5vh 0;
	font-weight: 600;
    border: none;
    border-radius: 3px;
    cursor: pointer;
    color: #090909;
    background: #00fff0;
	  position: relative;
}
.summary{
    width:200px;
    height: auto;
	padding: 5vh 0;
	font-weight: 600;
    border: none;
    border-radius: 3px;
    cursor: pointer;
    color: #00fff0;
    background: #090909;
	  position: relative;
}
.previous, .next{
    margin: 0 5px 0 0 ;
    font-size: 11px;
    font-weight: 600;
    width:175px;
    height: 40px;
    border: none;
    border-radius: 3px;
    cursor: pointer;
    color: #00fff0;
    background: #090909;
	  position: relative;
}

.the-end h4{
	font-size: 20px;
	font-weight: 900;

}
.the-end h5{
	font-size: 13px;	
	margin-bottom: 2vh;
}

.quiz-nav{
    width:200px;
    height: auto;
	padding: 3vh 0;
	font-weight: 600;
    border: none;
    border-radius: 3px;
    cursor: pointer;
    color: #00fff0;
    background: #090909;
	  position: relative;
}
.quiz-nav p{
    color: #ababab;
    font-size: 10px;
	margin: 0 auto 2vh auto;
}
.quiz-nav img{
    width:50px;
    height: 50px;
    border-radius: 50%;
	margin: 1vh auto 2vh auto;
}




.reveal {
    position: relative;
    transform: translateY(50px);
    opacity: 0;
    transition: all 1s ease;
}

.reveal.active {
    transform: translateY(0);
    opacity: 1;
}

.reveal2 {
    position: relative;
    margin-left: -10%;
    opacity: 0;
    transition: all 1s ease;
}

.reveal2.active2 {
     margin-left: 0;
    opacity: 1;
}

.reveal3 {
    position: relative;
    margin-left: -10%;
    opacity: 0;
    transition: all 1s ease;
}

.reveal3.active3 {
     margin-left: 0;
    opacity: 1;
}

	.step{
		font-size: 11px;
		font-weight: 300;
		color: #ababab;
	}
	
.inequality {
  width: 300px;
  height: 80px;
  display: block;
  margin: 5vh 50px;
}
.numberLine {
position: relative;
  width: 300px;
  height: 40px;
  display: block;
}
.horizontal {
  position: relative;
  padding-top: 20px;
  width: 300px;
  height: 20px;
}

.horizontal hr {
  width: 300px;
  border: 1px solid #cc5500;
}
.vertical {
  position: absolute;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  width: 300px;
  height: 20px;
   margin-top: -10px;
}
.vertical span{
  color: #cc5500;
  font-weight: 600;
}
.signs{
  width: 200px;
  height: 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  margin: 0 50px;
}
.signs span{
  color: #cc5500;
   font-size: 15px;
   font-weight: 600;
}
.numbers{
  width: 300px;
  height: 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
}
.numbers span{
  color: #cc5500;
  font-size: 12px;
}

.number-line-unvisible {
	opacity: 0;
	pointer-events: none;
}

.simulteneous {
	
	font-size: 12px;
	font-weight: 300;
	background: #090909;
	color: #ffffff;
	border-radius: 50%;
	padding: 5px;
}

.simulteneous-example {
	
	font-size: 12px;
	font-weight: 300;
	background: #00fff0;
	color: #090909;
	border-radius: 50%;
	padding: 5px;
}

.graphs-container {
	width: 670px;
	height: 250px;
	display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
}

.roots {
	flex-basis: 200px;
	height: 200px;
	padding-top: 25px;
	
}

.left-graph, .right-graph {
	flex-basis: 200px;
	height: 200px;
	color: #cc5500;
	display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
	margin-top: 50px;
}

.left-graph .horizontal {
	position: absolute;
  width: 200px;
  height: 200px;
  display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
}

.left-graph .horizontal hr {
  width: 200px;
  border: 1px solid #cc5500;
}

.left-graph .vertical {
	position: absolute;
  max-width: 200px;
  height: 200px;
  display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
  rotate: 90deg;
}

.left-graph .vertical hr{
  width: 200px;
  border: 1px solid #cc5500;
}

.left-graph .curve {
  position: absolute;
  width: 100px;
  height: 100px;
  border: none;
  margin-bottom: 80px;
  z-index: 99;
}


.right-graph .horizontal {
	position: absolute;
  width: 200px;
  height: 200px;
  display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
}

.right-graph .horizontal hr {
  width: 200px;
  border: 1px solid #cc5500;
}

.right-graph .vertical {
	position: absolute;
  max-width: 200px;
  height: 200px;
  display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
  rotate: 90deg;
}

.right-graph .vertical hr{
  width: 200px;
  border: 1px solid #cc5500;
}

.right-graph .curve {
   position: absolute;
  width: 100px;
  height: 100px;
  border: none;
  margin-top: 120px;
  z-index: 99;
  rotate: 180deg;
}

/*---------------- FOOTERS --------------*/
    footer {
        background: #090909;
		margin-top: -1vh;
		padding: 10vh 0;
    }
    .top-footer{
        margin: 0 auto;
		width: 900px;
        color: #ababab;
        display: flex;
        justify-content: space-between;
        flex-wrap: wrap;
    }
    .bottom-footer {
        margin: 10vh auto 0 auto;
		width: 900px;
        color: #ababab;
        display: flex;
        justify-content: space-between;
        flex-wrap: wrap;
    }
	footer .footer-contact i{
	color: #ffffff;
	font-size: 12px;	
}
	footer .top-footer .column1 {
		flex-basis: 400px;
		margin-top: 5vh;
	}
	
	footer .top-footer .column2,
	footer .top-footer .column3{
		flex-basis: 250px;
		margin-top: 5vh;
	}
    footer .top-footer h4 {
        font-size: 15px;
        font-weight: 600;
        color: #ffffff;
    }
    footer .top-footer .column2 ul {
        list-style: none;
        font-size: 13px;
        margin-top: 5vh;
    }
    footer .top-footer .column2 ul li {
        margin-top: 1vh;
    }
    footer .top-footer .column2 ul li a {
        color: #ababab;
        text-decoration: none;
        font-size: 13px;
        cursor: pointer;
    }
    footer .top-footer .column2 ul li a:hover {
        color: #00fff0;
    }
    footer .top-footer .column2 ul li .icon {
        width: 30px;
        height: 30px;
        display: flex;
        align-items: center;
        justify-content: center;
        background: #ababab;
        border-radius: 50%;
        cursor: pointer;
        margin-top: 10px;
    }
    footer .top-footer .column2 ul li .icon:hover {
        background: #00fff0;
    }
    footer .top-footer .column2 ul li .icon img {
        width: 20px;
        height: 20px;
        margin: auto;
    }	
footer .top-footer .social-links a {
  display: inline-block;
  text-align: center;
  height: 35px;
  width: 35px;
  background-color: #018098;
  opacity: 0.99;
  margin: 5vh 10px 10px 0;
  line-height: 35px;
  border-radius: 10%;
  color: #ffffff;
  transition: all 0.5s ease;
}
footer .top-footer .social-links a:hover {
  color: blue;
  background-color: #ffffff;
}

	footer .bottom-footer .column1 {
		flex-basis: 400px;
		
	}
	
	footer .bottom-footer .column2 {
		flex-basis: 500px;
		background: #00fff0;
		border-radius: 5px;
		display: flex;
		align-items: center;
        justify-content: center;
        flex-wrap: wrap;
	}
	footer .bottom-footer h4 {
		width: 100%;
        font-size: 20px;
        font-weight: 600;
        color: #000000;		
		text-align: center;
		margin-bottom:3vh;
    }
	
	footer .bottom-footer .column2 .column-1 button,
	footer .bottom-footer .column2 .column-2 button{
		padding: 10px;
		width: 140px;
		border-radius: 5px;
		background: #262626;
		color: #ffffff;
		border: none;
		cursor: pointer;
		transition: 0.25s;
	}
	footer .bottom-footer .column2 .column-1 button:hover,
	footer .bottom-footer .column2 .column-2 button:hover{
		background: #ffffff;
		color: #262626;
	}
footer .bottom-footer .column1 .copyright {
        font-size: 11px;
        margin-top: 2vh;
    }
    footer .bottom-footer .column1 .copyright a {
        font-size: 11px;
        font-weight: 600;
        color: #ababab;
    }
    footer .bottom-footer .column1 .copyright:hover a {
        color: #00fff0;
    }
	.footer-contact{
		font-size: 13px;
		margin-top: 1vh;
	}

}

@media only screen and (min-width: 683px) and (max-width: 1023px) {
	
.desktop ,.mobile {
	display: none;
}

#over{
	    background: rgba(0,0,0,0.8);
		height: auto;
}
#landing{
    width: 100%;
    height: 60vh;
}
#header{
    height: 20vh;
    margin: 0 5%;
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
}
.logo{
    height: auto;
    width: 150px;
    margin-top: 5vh;
}

#header ul{
   margin-top: 5vh;
}

#header ul li {
    display: inline-block;
    list-style: none;
    margin: 10px 15px;
}

#header ul li a {
    color: #ababab;
    text-decoration: none;
    font-size: 12px;
    font-weight: 600;
    position: relative;
}

#header ul li a::after {
    content: '';
    width: 0;
    height: 3px;
    background: #00fff0;
    position: absolute;
    left: 0;
    bottom: -6px;
    transition: 0.5s;
}

#header ul li a:hover {
    color: #00fff0;
}

#header ul li a:hover::after {
    width: 100%;
}

.user{ 
    display: inline-block;
    list-style: none;
    margin: 10px 0;
}

.login{
    margin-top: 5vh;
    width: 100px;
    height: 40px;
    font-size: 12px;
    font-weight: 600;
    border-radius: 50px;
    border: none;
    background: #090909;
    color: #00fff0;
}
.register{
    margin-top: 5vh;
     width: 150px;
    height: 40px;
    font-size: 12px;
    font-weight: 600;
    border-radius: 50px;
    border: 1px solid #00fff0;
   background: #090909;
    color: #00fff0;
	 cursor: pointer;
}
.register:hover{
    color: #090909;
	 background: #00fff0;
}

.background{
    width: 100%;
    height: 60vh;
    background-image: url(../Images/Hero.jpg);
    background-size: cover;
    background-position: center;  
	background-attachment: fixed;	
    animation: breath 30s linear infinite;
}



@keyframes breath {
    0%   { background-size: 100% 100vh; }
    50% { background-size: 125% 125vh; }
    100% { background-size: 100% 100vh; }
  }

.background #hero{
    height: 40vh;
    color: #ffffff;
    display: block;
    padding: 13vh 5% 0 5%;
}

#hero h1{
    font-size: 35px;
}

span{
    color: #00fff0;
}
.span{
    color: #cc5500;
}

.span-2{
    color: #008080;
}

#hero p{
    font-size: 14px;
    margin-top: 2vh;
	color: #ababab;
}

#load-1{
	margin-left: -10%;
	opacity: 0;
	transition-delay: 0.5s;
	transition-duration: 0.75s;
}
#load-2{
	margin-left: -10%;
	opacity: 0;
	transition-delay: 0.65s;
	transition-duration: 0.75s;
}
#load-3{
	margin-left: -10%;
	opacity: 0;
	position: relative;
	z-index: 99;
	transition-delay: 0.8s;
	transition-duration: 0.75s;
}
#load-4{
	margin-left: -10%;
	opacity: 0;
	position: relative;
	transition-delay: 1.5s;
	transition-duration: 0.75s;
}

#load-5{
	transform: translateY(0);
	opacity: 0;
	transition-delay: 0.10s;
	transition-duration: 0.25s;
}
#load-6{
	transform: translateY(0);
	opacity: 0;
	transition-delay: 0.20s;
	transition-duration: 0.25s;
}
#load-7{
	transform: translateY(0);
	opacity: 0;
	transition-delay: 0.30s;
	transition-duration: 0.25s;
}
#load-8{
	transform: translateY(0);
	opacity: 0;
	transition-delay: 0.40s;
	transition-duration: 0.25s;
}
#load-9{
	transform: translateY(0);
	opacity: 0;
	transition-delay: 0.50s;
	transition-duration: 0.25s;
}

.button-fill, .button-no-fill{
    margin: 20px 5px 0 0 ;
    font-size: 12px;
    font-weight: 600;
    width:150px;
    height: 40px;
    border: none;
    border-radius: 50px;
    cursor: pointer;
}

.button-fill{
    color: #000000;
    background: #00fff0;
}
.button-no-fill{
    color: #00fff0;
    border: 1px solid #00fff0;
    background: transparent;
}

/******************************** ABOUT US **********************************************/

#about{
	width: 650px;
    margin: 5vh auto;
}

.chapter-img{
        width: auto;
        height: 20vh;
        margin: -10vh 0 7vh 0;
		border-radius: 50%;
    }

.about-img{
    width: 30%;
    height: auto;
	display: none;
}
.heading-2{
    font-size: 15px;
    text-align: center;
    font-weight: lighter;
}

.tab-links{
    margin: 0 3px 0 0 ;
    font-size: 10px;
    font-weight: 600;
    width:120px;
    height: 50px;
    border: none;
    border-radius: 3px;
    cursor: pointer;
    color: #ffffff;
    background: #090909;
	  position: relative;
}
    .tab-links:hover {
        color: #00fff0;
    }
    .tab-links.active-link {
         color: #090909;
    background: #00fff0;
    }
	.tab-contents {
        display: none;
		width: 633px;
		margin: 0 auto;
    }
	.tab-contents .example{
		width: 643px;
		height: auto;
		padding: 5vh 2%;
		margin: 5vh 0;
		background: #090909;
		color: #00fff0;
		border-radius: 5px;
    }

    .tab-contents.active-tab {
        display: block;
    }

.tab-contents h1{
    font-size: 25px;
	margin-bottom: 5vh;

}

.tab-contents h2{
    font-size: 13px;
	margin-bottom: 1vh;
}

.tab-contents p{
    font-size: 11px;
	margin-bottom: 1vh;
}
.tab-contents h3{
    font-size: 12px;
	margin-bottom: 5vh;
}
.tab-contents h5{
    font-size: 12px;
	margin: 1vh 2%;
}
.tab-contents ul li{
    font-size: 11px;
}


.root-normal mroot{
	 font-size: 21px;
	font-weight: 600;
	 color: #090909;
}

.root-fraction mroot{
	 font-size: 32px;
	font-weight: 600;
	 color: #090909;
}

.ex-root-normal mroot{
	 font-size: 21px;
	font-weight: 600;
	 color: #00fff0;
}

.ex-root-fraction mroot{
	 font-size: 35px;
	font-weight: 600;
	 color: #00fff0;
}

mroot mtext{
	 font-size: 12px;
}
mroot mtext .nth-root{
	 font-size: 10px;
	 color: #090909;
}
mroot mtext .ex-nth-root{
	 font-size: 10px;
	 color: #00fff0;
}
mfrac{
	 font-size: 18px;
	 font-weight: 600;
}
h6{
	 font-size: 11px;
	 margin: 2vh 0;
}

.question-example {
	 color: #00fff0;
	 font-weight: 600;
}
.normal-example {
	 color: #090909;
	 font-weight: 600;
}
.completing-square {
	 color: #00fff0;
	 font-weight: 600;
	 font-size: 11px;
}
.normal-exponent-900 {
	 color: #090909;
	 font-weight: 900;
}

.fraction-bracket {
	font-size: 35px;
	 color: #090909;
	 font-weight: 300;
}
.fraction-bracket sup{
	font-size: 10px;
	 color: #090909;
	  font-weight: 900;
}

.ex-fraction-bracket {
	font-size: 32px;
	 color: #00fff0;
	 font-weight: 300;
}
.ex-fraction-bracket sup{
	font-size: 10px;
	 color: #00fff0;
	  font-weight: 900;
}
.tab-contents .bodmas{
    font-size: 12px;
	font-weight: 300;
	color: #090909;
	margin-bottom: 1vh;
}



.the-end{
	display: flex;
	flex-wrap: wrap;
	justify-content: space-between;
	align-items: center;
	margin: 25vh 0;
}
.quiz{
    width:150px;
    height: auto;
	padding: 3vh 0;
	font-weight: 600;
    border: none;
    border-radius: 3px;
    cursor: pointer;
    color: #090909;
    background: #00fff0;
	  position: relative;
}
.summary{
    width:150px;
    height: auto;
	padding: 5vh 0;
	font-weight: 600;
    border: none;
    border-radius: 3px;
    cursor: pointer;
    color: #00fff0;
    background: #090909;
	  position: relative;
}
.previous, .next{
    margin: 0 5px 0 0 ;
    font-size: 11px;
    font-weight: 600;
    width:150px;
    height: 40px;
    border: none;
    border-radius: 3px;
    cursor: pointer;
    color: #00fff0;
    background: #090909;
	  position: relative;
}

.the-end h4{
	font-size: 20px;
	font-weight: 900;

}
.the-end h5{
	font-size: 12px;	
	margin-bottom: 2vh;
}

.quiz-nav{
    width:150px;
    height: auto;
	padding: 2vh 0;
	font-weight: 600;
    border: none;
    border-radius: 3px;
    cursor: pointer;
    color: #00fff0;
    background: #090909;
	  position: relative;
}
.quiz-nav p{
    color: #ababab;
    font-size: 10px;
	margin: 0 auto 1vh auto;
}
.quiz-nav img{
    width:30px;
    height: 30px;
    border-radius: 50%;
	margin: 1vh auto;
}




.reveal {
    position: relative;
    transform: translateY(50px);
    opacity: 0;
    transition: all 1s ease;
}

.reveal.active {
    transform: translateY(0);
    opacity: 1;
}

.reveal2 {
    position: relative;
    margin-left: -10%;
    opacity: 0;
    transition: all 1s ease;
}

.reveal2.active2 {
     margin-left: 0;
    opacity: 1;
}

.reveal3 {
    position: relative;
    margin-left: -10%;
    opacity: 0;
    transition: all 1s ease;
}

.reveal3.active3 {
     margin-left: 0;
    opacity: 1;
}
	
	.step{
		font-size: 11px;
		font-weight: 300;
		color: #ababab;
	}

.inequality {
  width: 300px;
  height: 80px;
  display: block;
  margin: 5vh 50px;
}
.numberLine {
position: relative;
  width: 300px;
  height: 40px;
  display: block;
}
.horizontal {
  position: relative;
  padding-top: 20px;
  width: 300px;
  height: 20px;
}

.horizontal hr {
  width: 300px;
  border: 1px solid #cc5500;
}
.vertical {
  position: absolute;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  width: 300px;
  height: 20px;
   margin-top: -10px;
}
.vertical span{
  color: #cc5500;
  font-weight: 600;
}
.signs{
  width: 200px;
  height: 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  margin: 0 50px;
}
.signs span{
  color: #cc5500;
   font-size: 15px;
   font-weight: 600;
}
.numbers{
  width: 300px;
  height: 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
}
.numbers span{
  color: #cc5500;
  font-size: 12px;
}

.number-line-unvisible {
	opacity: 0;
	pointer-events: none;
}

.simulteneous {
	
	font-size: 12px;
	font-weight: 300;
	background: #090909;
	color: #ffffff;
	border-radius: 50%;
	padding: 5px;
}

.simulteneous-example {
	
	font-size: 12px;
	font-weight: 300;
	background: #00fff0;
	color: #090909;
	border-radius: 50%;
	padding: 5px;
}

.graphs-container {
	width: 670px;
	height: 250px;
	display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
}

.roots {
	flex-basis: 200px;
	height: 200px;
	padding-top: 25px;
	
}

.left-graph, .right-graph {
	flex-basis: 200px;
	height: 200px;
	color: #cc5500;
	display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
	margin-top: 50px;
}

.left-graph .horizontal {
	position: absolute;
  width: 200px;
  height: 200px;
  display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
}

.left-graph .horizontal hr {
  width: 200px;
  border: 1px solid #cc5500;
}

.left-graph .vertical {
	position: absolute;
  max-width: 200px;
  height: 200px;
  display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
  rotate: 90deg;
}

.left-graph .vertical hr{
  width: 200px;
  border: 1px solid #cc5500;
}

.left-graph .curve {
  position: absolute;
  width: 100px;
  height: 100px;
  border: none;
  margin-bottom: 80px;
  z-index: 99;
}


.right-graph .horizontal {
	position: absolute;
  width: 200px;
  height: 200px;
  display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
}

.right-graph .horizontal hr {
  width: 200px;
  border: 1px solid #cc5500;
}

.right-graph .vertical {
	position: absolute;
  max-width: 200px;
  height: 200px;
  display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
  rotate: 90deg;
}

.right-graph .vertical hr{
  width: 200px;
  border: 1px solid #cc5500;
}

.right-graph .curve {
   position: absolute;
  width: 100px;
  height: 100px;
  border: none;
  margin-top: 120px;
  z-index: 99;
  rotate: 180deg;
}

/*---------------- FOOTERS --------------*/
    footer {
        background: #090909;
		margin-top: -1vh;
		padding: 10vh 0;
    }
    .top-footer{
        margin: 0 auto;
		width: 94%;
        color: #ababab;
        display: flex;
        justify-content: space-between;
        flex-wrap: wrap;
    }
    .bottom-footer {
        margin: 10vh auto 0 auto;
		width: 94%;
        color: #ababab;
        display: flex;
        justify-content: space-between;
        flex-wrap: wrap;
    }
	footer .footer-contact i{
	color: #ffffff;
	font-size: 12px;	
}
	footer .top-footer .column1 {
		flex-basis: 30%;
		margin-top: 5vh;
	}
	
	footer .top-footer .column2 {
		flex-basis: 35%;
		margin-top: 5vh;
		text-align: center;
	}
	
	footer .top-footer .column3{
		flex-basis: 35%;
		margin-top: 5vh;
	}
    footer .top-footer h4 {
        font-size: 15px;
        font-weight: 600;
        color: #ffffff;
    }
    footer .top-footer .column2 ul {
        list-style: none;
        font-size: 13px;
        margin-top: 5vh;
    }
    footer .top-footer .column2 ul li {
        margin-top: 1vh;
    }
    footer .top-footer .column2 ul li a {
        color: #ababab;
        text-decoration: none;
        font-size: 13px;
        cursor: pointer;
    }
    footer .top-footer .column2 ul li a:hover {
        color: #00fff0;
    }
    footer .top-footer .column2 ul li .icon {
        width: 30px;
        height: 30px;
        display: flex;
        align-items: center;
        justify-content: center;
        background: #ababab;
        border-radius: 50%;
        cursor: pointer;
        margin-top: 10px;
    }
    footer .top-footer .column2 ul li .icon:hover {
        background: #00fff0;
    }
    footer .top-footer .column2 ul li .icon img {
        width: 20px;
        height: 20px;
        margin: auto;
    }	
footer .top-footer .social-links a {
  display: inline-block;
  text-align: center;
  height: 35px;
  width: 35px;
  background-color: #018098;
  opacity: 0.99;
  margin: 5vh 10px 10px 0;
  line-height: 35px;
  border-radius: 10%;
  color: #ffffff;
  transition: all 0.5s ease;
}
footer .top-footer .social-links a:hover {
  color: blue;
  background-color: #ffffff;
}

	footer .bottom-footer .column1 {
		flex-basis: 48%;
		
	}
	
	footer .bottom-footer .column2 {
		flex-basis: 50%;
		background: #00fff0;
		border-radius: 5px;
		display: flex;
		align-items: center;
        justify-content: center;
        flex-wrap: wrap;
	}
	footer .bottom-footer h4 {
		width: 100%;
        font-size: 18px;
        font-weight: 600;
        color: #000000;		
		text-align: center;
		margin-bottom:3vh;
    }
	
	footer .bottom-footer .column2 .column-1 button,
	footer .bottom-footer .column2 .column-2 button{
		padding: 10px;
		width: 140px;
		border-radius: 5px;
		background: #262626;
		color: #ffffff;
		border: none;
		cursor: pointer;
		transition: 0.25s;
	}
	footer .bottom-footer .column2 .column-1 button:hover,
	footer .bottom-footer .column2 .column-2 button:hover{
		background: #ffffff;
		color: #262626;
	}
footer .bottom-footer .column1 .copyright {
        font-size: 11px;
        margin-top: 2vh;
    }
    footer .bottom-footer .column1 .copyright a {
        font-size: 11px;
        font-weight: 600;
        color: #ababab;
    }
    footer .bottom-footer .column1 .copyright:hover a {
        color: #00fff0;
    }
	.footer-contact{
		font-size: 13px;
		margin-top: 1vh;
	}

}

@media only screen and (min-width: 400px) and (max-width: 682px) {
	
.desktop ,.tablet {
	display: none;
}

#over{
	    background: rgba(0,0,0,0.8);
		height: auto;
}
#landing{
    width: 100%;
    height: 60vh;
}
#header{
    height: 20vh;
    margin: 0 5%;
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
}
.logo{
    height: auto;
    width: 150px;
    margin-top: 5vh;
}

#header ul{
   margin-top: 5vh;
}

#header ul li {
    display: inline-block;
    list-style: none;
    margin: 10px 15px;
}

#header ul li a {
    color: #ababab;
    text-decoration: none;
    font-size: 12px;
    font-weight: 600;
    position: relative;
}

#header ul li a::after {
    content: '';
    width: 0;
    height: 3px;
    background: #00fff0;
    position: absolute;
    left: 0;
    bottom: -6px;
    transition: 0.5s;
}

#header ul li a:hover {
    color: #00fff0;
}

#header ul li a:hover::after {
    width: 100%;
}

.user{ 
    display: inline-block;
    list-style: none;
    margin: 10px 0;
}

.login{
    margin-top: 5vh;
    width: 100px;
    height: 40px;
    font-size: 12px;
    font-weight: 600;
    border-radius: 50px;
    border: none;
    background: #090909;
    color: #00fff0;
}
.register{
    margin-top: 5vh;
     width: 150px;
    height: 40px;
    font-size: 12px;
    font-weight: 600;
    border-radius: 50px;
    border: 1px solid #00fff0;
   background: #090909;
    color: #00fff0;
	 cursor: pointer;
}
.register:hover{
    color: #090909;
	 background: #00fff0;
}

.background{
    width: 100%;
    height: 60vh;
    background-image: url(../Images/Hero.jpg);
    background-size: cover;
    background-position: center;  
	background-attachment: fixed;	
    animation: breath 30s linear infinite;
}



@keyframes breath {
    0%   { background-size: 100% 100vh; }
    50% { background-size: 125% 125vh; }
    100% { background-size: 100% 100vh; }
  }

.background #hero{
    height: 40vh;
    color: #ffffff;
    display: block;
    padding: 13vh 5% 0 5%;
}

#hero h1{
    font-size: 35px;
}

span{
    color: #00fff0;
}
.span{
    color: #cc5500;
}

.span-2{
    color: #008080;
}

#hero p{
    font-size: 14px;
    margin-top: 2vh;
	color: #ababab;
}

#load-1{
	margin-left: -10%;
	opacity: 0;
	transition-delay: 0.5s;
	transition-duration: 0.75s;
}
#load-2{
	margin-left: -10%;
	opacity: 0;
	transition-delay: 0.65s;
	transition-duration: 0.75s;
}
#load-3{
	margin-left: -10%;
	opacity: 0;
	position: relative;
	z-index: 99;
	transition-delay: 0.8s;
	transition-duration: 0.75s;
}
#load-4{
	margin-left: -10%;
	opacity: 0;
	position: relative;
	transition-delay: 1.5s;
	transition-duration: 0.75s;
}

#load-5{
	transform: translateY(0);
	opacity: 0;
	transition-delay: 0.10s;
	transition-duration: 0.25s;
}
#load-6{
	transform: translateY(0);
	opacity: 0;
	transition-delay: 0.20s;
	transition-duration: 0.25s;
}
#load-7{
	transform: translateY(0);
	opacity: 0;
	transition-delay: 0.30s;
	transition-duration: 0.25s;
}
#load-8{
	transform: translateY(0);
	opacity: 0;
	transition-delay: 0.40s;
	transition-duration: 0.25s;
}
#load-9{
	transform: translateY(0);
	opacity: 0;
	transition-delay: 0.50s;
	transition-duration: 0.25s;
}

.button-fill, .button-no-fill{
    margin: 20px 5px 0 0 ;
    font-size: 12px;
    font-weight: 600;
    width:150px;
    height: 40px;
    border: none;
    border-radius: 50px;
    cursor: pointer;
}

.button-fill{
    color: #000000;
    background: #00fff0;
}
.button-no-fill{
    color: #00fff0;
    border: 1px solid #00fff0;
    background: transparent;
}

/******************************** ABOUT US **********************************************/

#about{
	width: 80%;
    margin: 5vh 10%;
}

.chapter-img{
        width: auto;
        height: 20vh;
        margin: -10vh 0 7vh 0;
		border-radius: 50%;
    }

.about-img{
    width: 30%;
    height: auto;
	display: none;
}
.heading-2{
    font-size: 15px;
    text-align: center;
    font-weight: lighter;
}

.tab-links{
    margin: 0 2px 0 0 ;
    font-size: 12px;
    font-weight: 600;
    width:100%;
    height: 50px;
    border: none;
    border-radius: 3px;
    cursor: pointer;
    color: #ffffff;
    background: #090909;
	  position: relative;
}
    .tab-links:hover {
        color: #00fff0;
    }
    .tab-links.active-link {
         color: #090909;
    background: #00fff0;
    }
	.tab-contents {
        display: none;
		width: 95%;
		margin: 0 auto;
    }
	.tab-contents .example{
		width: 100%;
		height: auto;
		padding: 5vh 2%;
		margin: 5vh 0;
		background: #090909;
		color: #00fff0;
		border-radius: 5px;
    }

    .tab-contents.active-tab {
        display: block;
    }

.tab-contents h1{
    font-size: 20px;
	margin-bottom: 5vh;

}

.tab-contents h2{
    font-size: 13px;
	margin-bottom: 1vh;
}

.tab-contents p{
    font-size: 11px;
	margin-bottom: 1vh;
}
.tab-contents h3{
    font-size: 11px;
	margin-bottom: 5vh;
}
.tab-contents h5{
    font-size: 11px;
	margin: 1vh 2%;
}
.tab-contents ul li{
    font-size: 11px;
}


.root-normal mroot{
	 font-size: 21px;
	font-weight: 600;
	 color: #090909;
}

.root-fraction mroot{
	 font-size: 32px;
	font-weight: 600;
	 color: #090909;
}

.ex-root-normal mroot{
	 font-size: 21px;
	font-weight: 600;
	 color: #00fff0;
}

.ex-root-fraction mroot{
	 font-size: 35px;
	font-weight: 600;
	 color: #00fff0;
}

mroot mtext{
	 font-size: 12px;
}
mroot mtext .nth-root{
	 font-size: 10px;
	 color: #090909;
}
mroot mtext .ex-nth-root{
	 font-size: 10px;
	 color: #00fff0;
}
mfrac{
	 font-size: 18px;
	 font-weight: 600;
}
h6{
	 font-size: 11px;
	 margin: 2vh 0;
}

.question-example {
	 color: #00fff0;
	 font-weight: 600;
}
.normal-example {
	 color: #090909;
	 font-weight: 600;
}
.completing-square {
	 color: #00fff0;
	 font-weight: 600;
	 font-size: 11px;
}
.normal-exponent-900 {
	 color: #090909;
	 font-weight: 900;
}

.fraction-bracket {
	font-size: 35px;
	 color: #090909;
	 font-weight: 300;
}
.fraction-bracket sup{
	font-size: 10px;
	 color: #090909;
	  font-weight: 900;
}

.ex-fraction-bracket {
	font-size: 32px;
	 color: #00fff0;
	 font-weight: 300;
}
.ex-fraction-bracket sup{
	font-size: 10px;
	 color: #00fff0;
	  font-weight: 900;
}
.tab-contents .bodmas{
    font-size: 12px;
	font-weight: 300;
	color: #090909;
	margin-bottom: 1vh;
}



.the-end{
	width:100%;
	margin: 10vh auto;
}
.quiz{
    width:100%;
    height: auto;
	padding: 3vh 0;
	font-weight: 600;
    border: none;
    border-radius: 3px;
    cursor: pointer;
    color: #090909;
    background: #00fff0;
	  position: relative;
}
.summary{
    width:90%;
    height: auto;
	padding: 5vh 0;
	font-weight: 600;
    border: none;
    border-radius: 3px;
    cursor: pointer;
    color: #00fff0;
    background: #090909;
	  position: relative;
}
.previous, .next{
    margin: 0 5px 0 0 ;
    font-size: 11px;
    font-weight: 600;
    width:90%;
    height: 40px;
    border: none;
    border-radius: 3px;
    cursor: pointer;
    color: #00fff0;
    background: #090909;
	  position: relative;
}

.the-end h4{
	font-size: 20px;
	font-weight: 900;

}
.the-end h5{
	font-size: 12px;	
	margin-bottom: 2vh;
}

.quiz-nav{
    width:100%;
    height: auto;
	padding: 2vh 0;
	font-weight: 600;
    border: none;
    border-radius: 3px;
    cursor: pointer;
    color: #00fff0;
    background: #090909;
	  position: relative;
}
.quiz-nav p{
    color: #ababab;
    font-size: 10px;
	margin: 0 auto 1vh auto;
}
.quiz-nav img{
    width:30px;
    height: 30px;
    border-radius: 50%;
	margin: 1vh auto;
}




.reveal {
    position: relative;
    transform: translateY(50px);
    opacity: 0;
    transition: all 1s ease;
}

.reveal.active {
    transform: translateY(0);
    opacity: 1;
}

.reveal2 {
    position: relative;
    margin-left: -10%;
    opacity: 0;
    transition: all 1s ease;
}

.reveal2.active2 {
     margin-left: 0;
    opacity: 1;
}

.reveal3 {
    position: relative;
    margin-left: -10%;
    opacity: 0;
    transition: all 1s ease;
}

.reveal3.active3 {
     margin-left: 0;
    opacity: 1;
}
	
	.step{
		font-size: 11px;
		font-weight: 300;
		color: #ababab;
	}

.inequality {
  width: 300px;
  height: 80px;
  display: block;
  margin: 5vh 50px;
}
.numberLine {
position: relative;
  width: 300px;
  height: 40px;
  display: block;
}
.horizontal {
  position: relative;
  padding-top: 20px;
  width: 300px;
  height: 20px;
}

.horizontal hr {
  width: 300px;
  border: 1px solid #cc5500;
}
.vertical {
  position: absolute;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  width: 300px;
  height: 20px;
   margin-top: -10px;
}
.vertical span{
  color: #cc5500;
  font-weight: 600;
}
.signs{
  width: 200px;
  height: 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  margin: 0 50px;
}
.signs span{
  color: #cc5500;
   font-size: 15px;
   font-weight: 600;
}
.numbers{
  width: 300px;
  height: 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
}
.numbers span{
  color: #cc5500;
  font-size: 12px;
}

.number-line-unvisible {
	opacity: 0;
	pointer-events: none;
}

.simulteneous {
	
	font-size: 12px;
	font-weight: 300;
	background: #090909;
	color: #ffffff;
	border-radius: 50%;
	padding: 5px;
}

.simulteneous-example {
	
	font-size: 12px;
	font-weight: 300;
	background: #00fff0;
	color: #090909;
	border-radius: 50%;
	padding: 5px;
}

.graphs-container {
	width: 90%;
	height: auto;
	display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
}

.roots {
	flex-basis: 100%;
	height: 200px;
	padding-top: 25px;
	
}

.left-graph, .right-graph {
	flex-basis: 100%;
	height: 200px;
	color: #cc5500;
	display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
	margin-top: 20px;
}

.left-graph .horizontal {
	position: absolute;
  width: 200px;
  height: 200px;
  display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
}

.left-graph .horizontal hr {
  width: 200px;
  border: 1px solid #cc5500;
}

.left-graph .vertical {
	position: absolute;
  max-width: 200px;
  height: 200px;
  display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
  rotate: 90deg;
}

.left-graph .vertical hr{
  width: 200px;
  border: 1px solid #cc5500;
}

.left-graph .curve {
  position: absolute;
  width: 100px;
  height: 100px;
  border: none;
  margin-bottom: 80px;
  z-index: 99;
}


.right-graph .horizontal {
	position: absolute;
  width: 200px;
  height: 200px;
  display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
}

.right-graph .horizontal hr {
  width: 200px;
  border: 1px solid #cc5500;
}

.right-graph .vertical {
	position: absolute;
  max-width: 200px;
  height: 200px;
  display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
  rotate: 90deg;
}

.right-graph .vertical hr{
  width: 200px;
  border: 1px solid #cc5500;
}

.right-graph .curve {
   position: absolute;
  width: 100px;
  height: 100px;
  border: none;
  margin-top: 120px;
  z-index: 99;
  rotate: 180deg;
}

/*---------------- FOOTERS --------------*/
    footer {
        background: #090909;
		margin-top: -1vh;
		padding: 5vh 0;
    }
    .top-footer{
        margin: 0 5%;
		width: 90%;
        color: #ababab;
        display: flex;
        justify-content: space-between;
        flex-wrap: wrap;
    }
    .bottom-footer {
       margin: 5vh 5%;
		width: 90%;
        color: #ababab;
        display: flex;
        justify-content: space-between;
        flex-wrap: wrap;
    }
	footer .footer-contact i{
	color: #ffffff;
	font-size: 12px;	
}
	footer .top-footer .column1 {
		flex-basis: 100%;
		margin-top: 5vh;
	}
	
	footer .top-footer .column2 {
		flex-basis: 100%;
		margin-top: 5vh;
		text-align: center;
	}
	
	footer .top-footer .column3{
		flex-basis: 100%;
		margin-top: 5vh;
	}
    footer .top-footer h4 {
        font-size: 15px;
        font-weight: 600;
        color: #ffffff;
    }
    footer .top-footer .column2 ul {
        list-style: none;
        font-size: 13px;
        margin-top: 5vh;
    }
    footer .top-footer .column2 ul li {
        margin-top: 1vh;
    }
    footer .top-footer .column2 ul li a {
        color: #ababab;
        text-decoration: none;
        font-size: 13px;
        cursor: pointer;
    }
    footer .top-footer .column2 ul li a:hover {
        color: #00fff0;
    }
    footer .top-footer .column2 ul li .icon {
        width: 30px;
        height: 30px;
        display: flex;
        align-items: center;
        justify-content: center;
        background: #ababab;
        border-radius: 50%;
        cursor: pointer;
        margin-top: 10px;
    }
    footer .top-footer .column2 ul li .icon:hover {
        background: #00fff0;
    }
    footer .top-footer .column2 ul li .icon img {
        width: 20px;
        height: 20px;
        margin: auto;
    }	
footer .top-footer .social-links a {
  display: inline-block;
  text-align: center;
  height: 35px;
  width: 35px;
  background-color: #018098;
  opacity: 0.99;
  margin: 5vh 10px 10px 0;
  line-height: 35px;
  border-radius: 10%;
  color: #ffffff;
  transition: all 0.5s ease;
}
footer .top-footer .social-links a:hover {
  color: blue;
  background-color: #ffffff;
}

	footer .bottom-footer .column1 {
		flex-basis: 100%;
		
	}
	
	footer .bottom-footer .column2 {
		flex-basis: 100%;
		padding: 5vh 0;
		margin: 3vh 0;
		background: #00fff0;
		border-radius: 5px;
		display: flex;
		align-items: center;
        justify-content: center;
        flex-wrap: wrap;
	}
	footer .bottom-footer h4 {
		width: 100%;
        font-size: 18px;
        font-weight: 600;
        color: #000000;		
		text-align: center;
		margin-bottom:3vh;
    }
	
	footer .bottom-footer .column2 .column-1 button,
	footer .bottom-footer .column2 .column-2 button{
		padding: 10px;
		width: 140px;
		border-radius: 5px;
		background: #262626;
		color: #ffffff;
		border: none;
		cursor: pointer;
		transition: 0.25s;
	}
	footer .bottom-footer .column2 .column-1 button:hover,
	footer .bottom-footer .column2 .column-2 button:hover{
		background: #ffffff;
		color: #262626;
	}
footer .bottom-footer .column1 .copyright {
        font-size: 11px;
        margin-top: 2vh;
    }
    footer .bottom-footer .column1 .copyright a {
        font-size: 11px;
        font-weight: 600;
        color: #ababab;
    }
    footer .bottom-footer .column1 .copyright:hover a {
        color: #00fff0;
    }
	.footer-contact{
		font-size: 13px;
		margin-top: 1vh;
	}

}

@media only screen and (max-width: 399px) {
	
.desktop ,.tablet {
	display: none;
}

#over{
	    background: rgba(0,0,0,0.8);
		height: auto;
}
#landing{
    width: 100%;
    height: 53vh;
}
#header{
    height: 20vh;
    margin: 0 5%;
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
}
.logo{
    height: auto;
    width: 125px;
    margin-top: 3vh;
}

#header ul{
   margin-top: 4vh;
}

#header ul li {
    display: inline-block;
    list-style: none;
    margin: 10px 15px;
}

#header ul li a {
    color: #ababab;
    text-decoration: none;
    font-size: 12px;
    font-weight: 600;
    position: relative;
}

#header ul li a::after {
    content: '';
    width: 0;
    height: 3px;
    background: #00fff0;
    position: absolute;
    left: 0;
    bottom: -6px;
    transition: 0.5s;
}

#header ul li a:hover {
    color: #00fff0;
}

#header ul li a:hover::after {
    width: 100%;
}

.user{ 
    display: inline-block;
    list-style: none;
    margin: 10px 0;
}

.login{
    margin-top: 5vh;
    width: 100px;
    height: 40px;
    font-size: 12px;
    font-weight: 600;
    border-radius: 50px;
    border: none;
    background: #090909;
    color: #00fff0;
}
.register{
    margin-top: 5vh;
     width: 150px;
    height: 40px;
    font-size: 12px;
    font-weight: 600;
    border-radius: 50px;
    border: 1px solid #00fff0;
   background: #090909;
    color: #00fff0;
	 cursor: pointer;
}
.register:hover{
    color: #090909;
	 background: #00fff0;
}

.background{
    width: 100%;
    height: 53vh;
    background-image: url(../Images/Hero.jpg);
    background-size: cover;
    background-position: center;  
	background-attachment: fixed;	
    animation: breath 30s linear infinite;
}



@keyframes breath {
    0%   { background-size: 100% 100vh; }
    50% { background-size: 125% 125vh; }
    100% { background-size: 100% 100vh; }
  }

.background #hero{
    height: 33vh;
    color: #ffffff;
    display: block;
    padding: 13vh 5% 0 5%;
}

#hero h1{
    font-size: 25px;
}

span{
    color: #00fff0;
}
.span{
    color: #cc5500;
}

.span-2{
    color: #008080;
}

#hero p{
    font-size: 14px;
    margin-top: 2vh;
	color: #ababab;
}

#load-1{
	margin-left: -10%;
	opacity: 0;
	transition-delay: 0.5s;
	transition-duration: 0.75s;
}
#load-2{
	margin-left: -10%;
	opacity: 0;
	transition-delay: 0.65s;
	transition-duration: 0.75s;
}
#load-3{
	margin-left: -10%;
	opacity: 0;
	position: relative;
	z-index: 99;
	transition-delay: 0.8s;
	transition-duration: 0.75s;
}
#load-4{
	margin-left: -10%;
	opacity: 0;
	position: relative;
	transition-delay: 1.5s;
	transition-duration: 0.75s;
}

#load-5{
	transform: translateY(0);
	opacity: 0;
	transition-delay: 0.10s;
	transition-duration: 0.25s;
}
#load-6{
	transform: translateY(0);
	opacity: 0;
	transition-delay: 0.20s;
	transition-duration: 0.25s;
}
#load-7{
	transform: translateY(0);
	opacity: 0;
	transition-delay: 0.30s;
	transition-duration: 0.25s;
}
#load-8{
	transform: translateY(0);
	opacity: 0;
	transition-delay: 0.40s;
	transition-duration: 0.25s;
}
#load-9{
	transform: translateY(0);
	opacity: 0;
	transition-delay: 0.50s;
	transition-duration: 0.25s;
}

.button-fill, .button-no-fill{
    margin: 20px 5px 0 0 ;
    font-size: 12px;
    font-weight: 600;
    width:150px;
    height: 40px;
    border: none;
    border-radius: 50px;
    cursor: pointer;
}

.button-fill{
    color: #000000;
    background: #00fff0;
}
.button-no-fill{
    color: #00fff0;
    border: 1px solid #00fff0;
    background: transparent;
}

/******************************** ABOUT US **********************************************/

#about{
	width: 90%;
    margin: 5vh 5%;
}

.chapter-img{
        width: auto;
        height: 10vh;
        margin: -5vh 0 0 0;
		border-radius: 50%;
    }

.about-img{
    width: 30%;
    height: auto;
	display: none;
}
.heading-2{
    font-size: 15px;
    text-align: center;
    font-weight: lighter;
}

.tab-links{
    margin: 0 2px 0 0 ;
    font-size: 12px;
    font-weight: 600;
    width:100%;
    height: 7vh;
    border: none;
    border-radius: 3px;
    cursor: pointer;
    color: #ffffff;
    background: #090909;
	  position: relative;
}
    .tab-links:hover {
        color: #00fff0;
    }
    .tab-links.active-link {
         color: #090909;
    background: #00fff0;
    }
	.tab-contents {
        display: none;
		width: 95%;
		margin: 0 auto;
    }
	.tab-contents .example{
		width: 100%;
		height: auto;
		padding: 5vh 2%;
		margin: 5vh 0;
		background: #090909;
		color: #00fff0;
		border-radius: 5px;
    }

    .tab-contents.active-tab {
        display: block;
    }

.tab-contents h1{
    font-size: 20px;
	margin-bottom: 5vh;

}

.tab-contents h2{
    font-size: 13px;
	margin-bottom: 1vh;
}

.tab-contents p{
    font-size: 11px;
	margin-bottom: 1vh;
}
.tab-contents h3{
    font-size: 11px;
	margin-bottom: 5vh;
}
.tab-contents h5{
    font-size: 11px;
	margin: 1vh 2%;
}
.tab-contents ul li{
    font-size: 11px;
}


.root-normal mroot{
	 font-size: 21px;
	font-weight: 600;
	 color: #090909;
}

.root-fraction mroot{
	 font-size: 32px;
	font-weight: 600;
	 color: #090909;
}

.ex-root-normal mroot{
	 font-size: 21px;
	font-weight: 600;
	 color: #00fff0;
}

.ex-root-fraction mroot{
	 font-size: 35px;
	font-weight: 600;
	 color: #00fff0;
}

mroot mtext{
	 font-size: 12px;
}
mroot mtext .nth-root{
	 font-size: 10px;
	 color: #090909;
}
mroot mtext .ex-nth-root{
	 font-size: 10px;
	 color: #00fff0;
}
mfrac{
	 font-size: 18px;
	 font-weight: 600;
}
h6{
	 font-size: 11px;
	 margin: 2vh 0;
}

.question-example {
	 color: #00fff0;
	 font-weight: 600;
}
.normal-example {
	 color: #090909;
	 font-weight: 600;
}
.completing-square {
	 color: #00fff0;
	 font-weight: 600;
	 font-size: 11px;
}
.normal-exponent-900 {
	 color: #090909;
	 font-weight: 900;
}

.fraction-bracket {
	font-size: 35px;
	 color: #090909;
	 font-weight: 300;
}
.fraction-bracket sup{
	font-size: 10px;
	 color: #090909;
	  font-weight: 900;
}

.ex-fraction-bracket {
	font-size: 32px;
	 color: #00fff0;
	 font-weight: 300;
}
.ex-fraction-bracket sup{
	font-size: 10px;
	 color: #00fff0;
	  font-weight: 900;
}
.tab-contents .bodmas{
    font-size: 12px;
	font-weight: 300;
	color: #090909;
	margin-bottom: 1vh;
}



.the-end{
	width:100%;
	margin: 10vh auto;
}
.quiz{
    width:100%;
    height: auto;
	padding: 3vh 0;
	font-weight: 600;
    border: none;
    border-radius: 3px;
    cursor: pointer;
    color: #090909;
    background: #00fff0;
	  position: relative;
}
.summary{
    width:90%;
    height: auto;
	padding: 5vh 0;
	font-weight: 600;
    border: none;
    border-radius: 3px;
    cursor: pointer;
    color: #00fff0;
    background: #090909;
	  position: relative;
}
.previous, .next{
    margin: 0 5px 0 0 ;
    font-size: 11px;
    font-weight: 600;
    width:90%;
    height: 40px;
    border: none;
    border-radius: 3px;
    cursor: pointer;
    color: #00fff0;
    background: #090909;
	  position: relative;
}

.the-end h4{
	font-size: 20px;
	font-weight: 900;

}
.the-end h5{
	font-size: 12px;	
	margin-bottom: 2vh;
}

.quiz-nav{
    width:100%;
    height: auto;
	padding: 2vh 0;
	font-weight: 600;
    border: none;
    border-radius: 3px;
    cursor: pointer;
    color: #00fff0;
    background: #090909;
	  position: relative;
}
.quiz-nav p{
    color: #ababab;
    font-size: 10px;
	margin: 0 auto 1vh auto;
}
.quiz-nav img{
    width:30px;
    height: 30px;
    border-radius: 50%;
	margin: 1vh auto;
}




.reveal {
    position: relative;
    transform: translateY(50px);
    opacity: 0;
    transition: all 1s ease;
}

.reveal.active {
    transform: translateY(0);
    opacity: 1;
}

.reveal2 {
    position: relative;
    margin-left: -10%;
    opacity: 0;
    transition: all 1s ease;
}

.reveal2.active2 {
     margin-left: 0;
    opacity: 1;
}

.reveal3 {
    position: relative;
    margin-left: -10%;
    opacity: 0;
    transition: all 1s ease;
}

.reveal3.active3 {
     margin-left: 0;
    opacity: 1;
}
	
	.step{
		font-size: 11px;
		font-weight: 300;
		color: #ababab;
	}

.inequality {
  width: 280px;
  height: 80px;
  display: block;
  margin: 5vh auto;
}
.numberLine {
position: relative;
  width: 280px;
  height: 40px;
  display: block;
}
.horizontal {
  position: relative;
  padding-top: 20px;
  width: 280px;
  height: 20px;
}

.horizontal hr {
  width: 280px;
  border: 1px solid #cc5500;
}
.vertical {
  position: absolute;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  width: 280px;
  height: 20px;
   margin-top: -10px;
}
.vertical span{
  color: #cc5500;
  font-weight: 600;
}
.signs{
  width: 200px;
  height: 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  margin: 0 auto;
}
.signs span{
  color: #cc5500;
   font-size: 15px;
   font-weight: 600;
}
.numbers{
  width: 280px;
  height: 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
}
.numbers span{
  color: #cc5500;
  font-size: 12px;
}

.number-line-unvisible {
	opacity: 0;
	pointer-events: none;
}

.simulteneous {
	
	font-size: 10px;
	font-weight: 300;
	background: #090909;
	color: #ffffff;
	border-radius: 50%;
	padding: 5px;
}

.simulteneous-example {
	
	font-size: 10px;
	font-weight: 300;
	background: #00fff0;
	color: #090909;
	border-radius: 50%;
	padding: 5px;
}

.graphs-container {
	width: 90%;
	height: auto;
	display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
}

.roots {
	flex-basis: 100%;
	height: 200px;
	padding-top: 25px;
	
}

.left-graph, .right-graph {
	flex-basis: 100%;
	height: 200px;
	color: #cc5500;
	display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
	margin-top: 20px;
}

.left-graph .horizontal {
	position: absolute;
  width: 200px;
  height: 200px;
  display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
}

.left-graph .horizontal hr {
  width: 200px;
  border: 1px solid #cc5500;
}

.left-graph .vertical {
	position: absolute;
  max-width: 200px;
  height: 200px;
  display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
  rotate: 90deg;
}

.left-graph .vertical hr{
  width: 200px;
  border: 1px solid #cc5500;
}

.left-graph .curve {
  position: absolute;
  width: 100px;
  height: 100px;
  border: none;
  margin-bottom: 80px;
  z-index: 99;
}


.right-graph .horizontal {
	position: absolute;
  width: 200px;
  height: 200px;
  display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
}

.right-graph .horizontal hr {
  width: 200px;
  border: 1px solid #cc5500;
}

.right-graph .vertical {
	position: absolute;
  max-width: 200px;
  height: 200px;
  display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
  rotate: 90deg;
}

.right-graph .vertical hr{
  width: 200px;
  border: 1px solid #cc5500;
}

.right-graph .curve {
   position: absolute;
  width: 100px;
  height: 100px;
  border: none;
  margin-top: 120px;
  z-index: 99;
  rotate: 180deg;
}

/*---------------- FOOTERS --------------*/
    footer {
        background: #090909;
		margin-top: -1vh;
		padding: 5vh 0;
    }
    .top-footer{
        margin: 0 5%;
		width: 90%;
        color: #ababab;
        display: flex;
        justify-content: space-between;
        flex-wrap: wrap;
    }
    .bottom-footer {
       margin: 5vh 5%;
		width: 90%;
        color: #ababab;
        display: flex;
        justify-content: space-between;
        flex-wrap: wrap;
    }
	footer .footer-contact i{
	color: #ffffff;
	font-size: 12px;	
}
	footer .top-footer .column1 {
		flex-basis: 100%;
		margin-top: 5vh;
	}
	
	footer .top-footer .column2 {
		flex-basis: 100%;
		margin-top: 5vh;
		text-align: center;
	}
	
	footer .top-footer .column3{
		flex-basis: 100%;
		margin-top: 5vh;
	}
    footer .top-footer h4 {
        font-size: 15px;
        font-weight: 600;
        color: #ffffff;
    }
    footer .top-footer .column2 ul {
        list-style: none;
        font-size: 13px;
        margin-top: 5vh;
    }
    footer .top-footer .column2 ul li {
        margin-top: 1vh;
    }
    footer .top-footer .column2 ul li a {
        color: #ababab;
        text-decoration: none;
        font-size: 13px;
        cursor: pointer;
    }
    footer .top-footer .column2 ul li a:hover {
        color: #00fff0;
    }
    footer .top-footer .column2 ul li .icon {
        width: 30px;
        height: 30px;
        display: flex;
        align-items: center;
        justify-content: center;
        background: #ababab;
        border-radius: 50%;
        cursor: pointer;
        margin-top: 10px;
    }
    footer .top-footer .column2 ul li .icon:hover {
        background: #00fff0;
    }
    footer .top-footer .column2 ul li .icon img {
        width: 20px;
        height: 20px;
        margin: auto;
    }	
footer .top-footer .social-links a {
  display: inline-block;
  text-align: center;
  height: 35px;
  width: 35px;
  background-color: #018098;
  opacity: 0.99;
  margin: 5vh 10px 10px 0;
  line-height: 35px;
  border-radius: 10%;
  color: #ffffff;
  transition: all 0.5s ease;
}
footer .top-footer .social-links a:hover {
  color: blue;
  background-color: #ffffff;
}

	footer .bottom-footer .column1 {
		flex-basis: 100%;
		
	}
	
	footer .bottom-footer .column2 {
		flex-basis: 100%;
		padding: 5vh 0;
		margin: 3vh 0;
		background: #00fff0;
		border-radius: 5px;
		display: flex;
		align-items: center;
        justify-content: center;
        flex-wrap: wrap;
	}
	footer .bottom-footer h4 {
		width: 100%;
        font-size: 18px;
        font-weight: 600;
        color: #000000;		
		text-align: center;
		margin-bottom:3vh;
    }
	
	footer .bottom-footer .column2 .column-1 button,
	footer .bottom-footer .column2 .column-2 button{
		padding: 10px;
		width: 140px;
		border-radius: 5px;
		background: #262626;
		color: #ffffff;
		border: none;
		cursor: pointer;
		transition: 0.25s;
	}
	footer .bottom-footer .column2 .column-1 button:hover,
	footer .bottom-footer .column2 .column-2 button:hover{
		background: #ffffff;
		color: #262626;
	}
footer .bottom-footer .column1 .copyright {
        font-size: 10px;
        margin-top: 2vh;
    }
    footer .bottom-footer .column1 .copyright a {
        font-size: 10px;
        font-weight: 600;
        color: #ababab;
    }
    footer .bottom-footer .column1 .copyright:hover a {
        color: #00fff0;
    }
	.footer-contact{
		font-size: 10px;
		margin-top: 1vh;
	}
}