*{
    margin: 0;
    padding: 0;
}
  .header{
      min-height: 100vh;
      width: 100%;
      background-image: linear-gradient(rgba(4,9,30,0.7),rgba(4,9,30,0.7)),url(images/banner3.png);
      background-position: center;
      background-size: cover;
      position: relative;
}
html{
    scroll-behavior: smooth;
}

nav{
    display: flex;
    padding: 2% 6%;
    justify-content: space-between;
    align-items: center;
}
nav img{
    width: 200px;
}
.nav-links{
    flex: 1;
    text-align: right;
    
}
.nav-links ul li{
    list-style: none;
    display: inline-block;
    padding: 8px 12px;
    position: relative;
}
.nav-links ul li a{
    color: #fff;
    text-decoration: none;
    font-size: 13px;
}
.nav-links ul li::after{
    content: '';
    width: 0%;
    height: 2PX;
    background: #f44336;
    display: block;
    margin: auto;
    transition: 0.5%
}
.nav-links ul li:hover::after{
    width: 100%;
}
.text-box{
    width: 90%;
    color: #fff;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%,-50%);
    text-align: center;
}
.text-box h1{
    font-size: 62px;
}
.text-box p{
    margin: 10px 0 40px;
    font-size: 14px;
    color: #fff;
}
.hero-btn{
    display: inline-block;
    text-decoration: none;
    color: #fff;
    border: 1px solid #fff;
    padding: 12px 34px;
    font-size: 13px;
    background: transparent;
    position: relative;
    cursor: pointer;
}
.red-btn{
    border: 1px solid #f44336;
    background: transparent;
    color: #f44336;
}
.red-btn:hover{
    color: white;
}
.hero-btn:hover{
    border: 1px solid #f44336;
    background: #f44336;
    transition: 1s;
}

nav .fa{
    display: none;
}

@media(max-width: 700px){
    .text-box h1{
    font-size: 20px;
  }
    .nav-links ul li{
        display: block;
    } 
    .nav-links{
        position: fixed;
        background: #f44336;
        height: 100vh;
        width: 200px;
        top: 0;
        right: -200px;
        text-align: left;
        z-index: 2;
        transition: 1s;
        
    }
    nav .fa{
        display: block;
        color: #fff;
        margin: 10px;
        font-size: 22px;
        cursor: pointer;
    }
    .nav-links ul{
        padding: 30px;
        
    }
}

/*------ course ------*/

.course{
    width: 80%;
    margin: auto;
    text-align: center;
    padding-top: 100px;
}
h1{
    font-size: 39px;
    font-weight: 600;
    
}
p{
    color: #777;
    font-size: 14px;
    font-weight: 300;
    line-height: 22px;
    padding: 10px;
}

.row{
    margin-top: 5%;
    display: flex;
    justify-content:space-between;
}
.course-col{
    flex-basis: 31%;
    background: #fff3f3;
    border-radius: 10px;
    margin-bottom: 15%;
    padding: 20px 12px;
    box-sizing: border-box;
    transition: 0.5s;
}
h3{
    text-align: center;
    font-weight: 600;
    margin: 20px 0;
}
.course-col:hover{
    box-shadow: 0 0 20px 0px rgba(0,0,0,0.2);
}
@media(max-width: 700px){
    .row{
        flex-direction: column;
    }
}

/*-------------footer----------*/

.footer{
    width: 100%;
    text-align: center;
    padding: 30px 0;
}

.footer h4{
    margin-bottom: 25px;
    margin-top: 20px;
    font-weight: 600;
    
}

/*------------- About page-----------*/

.sub-header{
    height: 60vh;
    width: 100%;
    background-image: linear-gradient(rgba(4,9,30,0.7),rgba(4,9,30,0.7)),url(images/aboutbg.jpg);
    background-position: center;
    background-size: cover;
    text-align: center;
    color: #fff;
}
.sub-header h1{
    margin-top: 100px;
}
.about-us{
    width: 80%;
    margin: auto;
    padding: 80px;
    padding-bottom: 50px;
}
.about-col img{
    float: left;
    width: 300px;
    height: 300px;
    padding: 0 10px 0 0 ;
    
}

/*-----------------case-studies------*/
.sub-header1{
    height: 60vh;
    width: 100%;
    background-image: linear-gradient(rgba(4,9,30,0.7),rgba(4,9,30,0.7)),url(images/aboutbg.jpg);
    background-position: center;
    background-size: cover;
    text-align: center;
    color: #fff;
}
.sub-header1 h1{
    margin-top: 100px;
}
.case-studies{
    width: 80%;
    margin: auto;
    padding: 80px;
    padding-bottom: 50px;
    box-sizing: border-box;
}
.case-studies img{
    float: left;
    width: 400px;
    height: 300px;
    padding: 0 10px 0 0 ;
    
}
/*-------reviews--------*/
.location{
    width: 80%;
    margin: auto;
    padding: 80px 0;
}
.location iframe{
    width: 100%
}


.sub-header2{
    height: 60vh;
    width: 100%;
    background-image: linear-gradient(rgba(4,9,30,0.7),rgba(4,9,30,0.7)),url(images/aboutbg.jpg);
    background-position: center;
    background-size: cover;
    text-align: center;
    color: #fff;
}
.sub-header2 h1{
    margin-top: 100px;
}
.REVIEWS{
    width: 80%;
    margin: auto;
    padding: 80px;
    padding-bottom: 50px;
}
.REVIEWS img{
    float: right;
    width: 400px;
    height: 400px;
    padding: 0 10px 0 0 ;
    
}
/*-------contact us----*/

.contact-us{
    width: 80%;
    margin: auto;
}
.contact-col{
    flex-basis: 48%;
    margin-bottom: 30px;
}
contact-col div{
    display: flex;
    align-items: center;
    margin-bottom: 40px;
    
}
.contact-col div .fa{
    font-size: 28px;
    color: #f44336;
    margin: 10px;
    margin-right: 30px;
}
.contact-col div p{
    padding: 0;
}
.contact-col div h5{
    font-size: 20px;
    margin-bottom: 5px;
    color: #555;
    font-weight: 400;
}
.contact-col input, .contact-col textarea{
    width: 100%;
    padding: 15px;
    margin-bottom: 17px;
    outline: none;
    border: 1px solid #ccc;
    box-sizing: border-box;
    

}
.contact-us img{
    float:center;
    width: 700px;
    height: 600px;
    padding: 10 10px 0 0 ;
}
.location img{
    float:center;
    width: 200px;
    height: 200px;
    padding: 10 10px 0 600 ;
}
/*----arrow----*/
.arrow-btn{
    position:fixed;
    bottom: 40px;
    right: 20px;
    z-index: 10;
    
}
.arrow-btn a{
    height: 39px;
    width: 37px;
    text-align: center;
    background: aqua;
    display: block;
    border-radius: 3px;
    cursor: pointer;
    
}
.arrow-btn a span{
    color: lemonchiffon;
    line-height: 39px;
    font-size: 25px;
}