*{
    background-color: black;        
    
color: white;
font-family: Tahoma;
box-sizing: border-box;
scroll-behavior: smooth;
padding: 0;
margin: 0;
}

header, section, footer{
    text-align: center;
}

.banner{
width: 100%;
margin-bottom: 65px;
}

.logo1{
height: 180px;
}

.slogan{
color: yellow;
font-weight: bold;  


}

.d-slogan{
    margin: 15px auto 35px;
width: 600px;

}

.tabs{

display: inline-block;
background-color: navy;
text-align: center;
width: 100%;
font-size: 30px;
border-radius: 50px;
margin-bottom: 55px;
}

.tab-btn{
background-color: navy;
border: none;
padding: 10px 30px;
font-size: 18px;
transition: 0.2s ease;
font-weight: bold;
text-transform: uppercase;
}

.tab-btn:active, .tab-btn:hover, .tab-btn:focus{
    border-bottom: 2px solid white;
cursor: pointer;
}

.border{
    border-bottom: 2px solid white;
}

section{
margin-bottom: 50px;

}


.c-container1 h2{
    margin-bottom: 90px;
 font-size: 30px;
 display: inline-block;
 width: 300px;
padding: 10px;
 background-color: navy;
border-radius: 50px;
}

.cards-big-container{
    display: flex;

justify-content: space-around;
flex-wrap: wrap;
}

.cards img{
height: 230px;
width: fit-content;
margin-bottom: 10px;
}

.cards{
    margin-bottom: 50px;
    background-color: navy;    
 padding-bottom: 10px;
border-radius: 50px;

}

.cards h3{

font-size: 30px;
background-color: navy;
width: 380px;
}

.cards a{
    text-decoration: none;
    display: inline-block;
    font-size: 20px;
    margin-top: 15px;
    padding: 8px 20px;
    background-color: red;
border-radius: 50px;
transition: 1s ease;
}

.cards a:hover, .cards a:focus{
    transform: scale(1.1);
border: 1px solid white;
}




footer{
    text-align: center;
}

.f-big-container{
    display: flex;
    justify-content: space-around;
margin-bottom: 100px;
}

footer img{
    height: 250px;
}

footer h3{
    font-size: 35px;
}

.form input{
    display: block;
    text-align: left;
    padding: 10px 10px;
    height: 40px;
    width: 400px;
background-color: white;
color: black;
margin-top: 40px;
}

.submit{
    background-color: navy;
    text-align: center;
    color: white;
    padding: 10px 10px;
font-size: 20px;
height: 50px;
width: 200px;
border-radius: 50px;
transition: 1s ease;
}

.submit:hover, #submit:focus{
    transform: scale(1.1);
border: 2px solid;
}



/* This is for mobiles
.form{
    display: inline-block;
    margin: auto;
margin-top: 80px;
}

.submit{
    margin: auto;
margin-top: 40px;
} */ 

footer span{
    padding-bottom: 30px;
font-size: 20px;
}

#about-container{
    height: 100vh;
    background-image: url(../IMG/Background.png);
    background-size: cover;
    text-align: left;
    


}


.about{
    background-color:rgba(0, 0, 0, 0);
margin-left: 150px;    
margin-top: 20px;
}


.a-heading{
  margin-top: 100px;  
  display: inline-block;  
  background-color:rgba(0, 0, 0, 0);

    font-size: 35px;
color: yellow;
}

.a-heading span{
font-size: 65px;
background-color:rgba(0, 0, 0, 0);
}

.a-p span{
    background-color:rgba(0, 0, 0, 0);
}

.a-p{
    background-color:rgba(0, 0, 0, 0);
margin-top: 1px;
font-size: 30px;
background-color:rgba(0, 0, 0, 0);
}

.a-btns{
    
    margin-top: 20px;
    background-color:rgba(0, 0, 0, 0);
}

.a-btns button{
 background-color: navy;   
padding: 10px 20px;
border-radius: 50px;
 font-size: 20px;
transition: 0.4s ease;
}

.me{
    margin-right: 15px;
}

.a-btns button:hover, .a-btns button:focus{
transform: scale(1.1);
border: 1px solid;
cursor: pointer;
}

.socialicons{
    margin-left: 50px;
    background-color:rgba(0, 0, 0, 0);
    margin-top: 20px;
text-decoration: none;
    
}

.socialicons a{
    margin-right: 25px;
}

.s-links{
    transition: 0.4 ease;
}

.s-links:hover, .s-links:focus{
    transform: scale(1.1);
}

.a-big-container{
    margin-bottom: 100px;
}

#topics-container, #courses-container, #about-container{
    display: none;
    
    
}



.active{    
display: block !important;

}

.active2{
    display: none !important;
    
}