*{
    margin: 0;
    padding: 0;
    border: 0;
    outline: 0;
    text-decoration: none;
    list-style: none;
    box-sizing: border-box;
}
:root{
    --color-primary: #6c63ff;
    --color-success: #00bf8e;
    --color-warning: #f7c94b;
    --color-danger: #f75842;
    --color-danger-variant: rgba(247, 88, 66, 0.4);
    --color-white: #fff;
    --color-light: rgba(255, 255, 255, 0.7);
    --color-black: #000;
    --color-bg: #1f2641;
    --color-bg1: #2e3267;
    --color-bg2: #424890;

    --container-width-lg: 80%;
    --container-width-md: 90%;
    --container-width-sm: 95%;
    --container-width-xs:100%;

    --transition: all 400ms ease;

}
body{
    font-family: 'Montserrat', sans-serif;
    line-height: 1.7;
    color: var(--color-white);
    background: var(--color-bg);
}
.container{
    width: var(--container-width-lg);
    margin: 0 6rem ;
}
.container .header-container{
    grid-template-columns: 60% 40%;
}
section{
    padding: 6rem 0;
}
section h2{
    text-align: center;
    margin-bottom: 4rem;
}
h1,
h2,
h3,
h4,
h5{
    line-height: 1;
}
h1{
    font-size: 2.4rem;
}
h2{
    font-size: 2rem;
}
h3{
    font-size: 1.6rem;
}
h4{
    font-size: 1.3rem;
}
a{
    color: var(--color-white);
}
.nav-container span{
    color: var(--color-danger);
}

img{
    width: 100vh;
margin-left: 20%;
    object-fit: cover;
    ;
}

/*********** navbar **********/
nav{
    background: transparent;
    width: 100vw;
    height: 5rem;
    position: fixed;
    top: 0;
    z-index: 11;
}
/* change navbar styles on scroll using javascript */

.window-scroll{
    background: var(--color-primary);
    box-shadow: 0 1rem 2rem rgba(0, 0, 0, 0.2);
}
.nav-container{
    height: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
}
nav button{
    display: none;
}
.nav-menu{
    display: flex;
    align-items: center;
    gap: 4rem;
}.nav-menu a{
    font-size: 0.9rem;
    transition:var(--transition) ;
}
.nav-menu a:hover{
color: var(--color-bg);
}

/**************** header**************/

header{
    position: relative;
    top:5rem;
    overflow: hidden;
    height: 70vh;
    margin-bottom: 5rem;
}
.header-container{
    display: grid;
    grid-template-columns: 1fr 1fr;
    align-items: flex-start;
    height: 100%;
}
.header-left p{
    margin: 2rem 0 3.4rem;
}
.header-left h2{
    margin-top: 3rem;
}

/******** categories *********/

.categories{
    background: var(--color-bg1);


}
.categories h1{
    line-height: 1;
    margin-bottom: 3rem;
}
.categories-container{
    display: grid;
    grid-template-columns: 40% 60%;
    gap: 4rem;
}
.categories-left{
    margin-right: 4rem;
}
.categories-left p{
    margin: 1rem 0 3rem;
}
.categories-right{
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.2rem;
}
.category{
    background: var(--color-bg2);
    padding: 1rem;
    border-radius: 2rem;
    transition: var(--transition);
}
.category:hover{
    box-shadow:0 3rem 3rem rgba(0, 0, 0, 0.3) ;
    z-index: 1;
}
.category:nth-child(2) .category-icon{
    background: var(--color-danger);
}
.category:nth-child(3) .category-icon{
    background: var(--color-success);
}
.category:nth-child(4) .category-icon{
    background: var(--color-warning);
}
.category:nth-child(5) .category-icon{
    background: var(--color-success);
}
.category-icon{
    background: var(--color-primary);
    padding: 0.7rem;
    border-radius: 0.9rem; 
}
.category h5{
    margin: 2rem 0 1rem;
}
.category p{
    font-size: 0.85rem;
}


/******* product ********/

.courses{
    background: var(--color-bg);
    margin-top: 10rem;
    

  }
  .courses .box-container{
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    margin-right: 50px;
    margin-left: 50px;
    
  }
  .courses .box-container .box{
    background: var(--color-bg1);
    border-radius: .5rem;
    border: 1px solid transparent;
    position: relative;
    overflow: hidden;
    text-align: center;
    
  }
  .courses .box-container .box:hover{
         background: transparent;
         border-color: var(--color-primary);
  }
  
  .courses .box-container .box .image img{
    height: 20%;
    width: 90%;
    margin-left: 12px;
    border-radius: .5rem;
    object-fit: cover;
  }
  .courses h1{
    margin-left: 25%;
    font-size: 50px;
  }
  
  .course .box-container .box .content p{
    margin: 1.2rem 0 2rem;
    font-size: 0.9rem;
  }

  /*********** faqs ***********/

  .faqs{
    background: var(--color-bg1);
    box-shadow: inset 0 0 3rem rgba(0, 0, 0, 0.5);
  }
  .faqs-container{
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
  }
  .faq{
    padding: 2rem;
    display: flex;
    align-items: center;
    gap: 1.4rem;
    height: fit-content;
    background: var(--color-primary);
    cursor: pointer;
  }
  .faq h4{
    font-size: 1rem;
    line-height: 2.2;
  }
  .faq-icon{
    align-items: flex-start;
    font-size: 1.2rem;
  }
  .faq p{
    margin-top: 0.8rem;
    display: none;
  }
  .faq.open p{
    display: block;
  }

  /************ testimonials ************/

  .testimonials-container{
    overflow: hidden;
    position: relative;
    margin-bottom: 5rem;

  }
  .testimonial{
    padding-top: 2rem;
    text-align: center;
  }
  
  .avatar{
    width: 150px;
    height: 150px;
    border: 1rem solid var(--color-bg1);
    border-radius: 50%;
    overflow: hidden;
    align-items: center;
    margin-top: 1rem;
    margin-left: 42%;
    
 }
 .avatar img{
    width: 100%;
    height: 100%;
    object-fit: cover;
    
 }
 .testimonial-info{
    text-align: center;
 }
 .testimonial-body{
    background: var(--color-primary);
    padding: 2rem;
    margin-top: 3rem;
    position: relative;
 }
.testimonial-body::before{
    content: "";
    display: block;
    background: linear-gradient(135deg, transparent, var(--color-primary), var(--color-primary), var(--color-primary));
    width: 3rem;
    height: 3rem;
    position: absolute;
    left:  48%;
    top: -1.5rem;
    transform: rotate(45deg);
}  

.swiper-wrapper .swiper-pagination-bullet-active{
background: #fff;
color: #fff;
}

/********** footer ***********/

footer{
    background: var(--color-bg1);
    padding-top: 5rem;
    font-size: 0.9rem;
}
.footer-container{
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 5rem;
}
.footer-container > div h4{
margin-bottom: 1.2rem;
}
.footer-1 p{
    margin: 0 0 2rem;
}
footer ul li{
    margin-bottom: 0.7rem;
}
footer ul li a:hover{
    text-decoration: underline;
}
.footer-socials{
    display: flex;
    gap: 1rem;
    font-size: 1.2rem;
    margin-top: 2rem;
}
.footer-copyright{
    text-align: center;
    margin-top: 4rem;
    padding: 1.2rem;
    border-top: 1px solid var(--color-bg2);
}


/******** media queries for tablets ************/

  @media (max-width: 1024px){

    .container{
        width: var(--container-width-md);
    }
    h1{
        font-size: 2.2rem;
    }
    h2{
        font-size: 1.7rem;
    }
    h3{
        font-feature-settings: 1.4rem;
    }
    h4{
        font-size: 1.2rem;
    }
    



    /********* navbar *************/
    nav button{
        display: inline-block;
        background: transparent;
        font-size: 1.8rem;
        color: var(--color-white);
        cursor: pointer;
    }
    nav button#close-menu-btn{
        display: none;
    }
    .nav-menu{
        position: fixed;
        top: 5rem;
        right: 5%;
        height: fit-content;
        width: 18rem;
        flex-direction: column;
        gap: 0;
        display: none;
    }

    .nav-menu li{
        width: 60%;
        height: 3.5rem;
        animation: animateNavItems is linear forwards;
        transform-origin: top right;
    }
    .nav-menu li:nth-child(2){
        animation-delay: 2s;
    }
    .nav-menu li:nth-child(3){
        animation-delay: 3s;
    }
    .nav-menu li:nth-child(4){
        animation-delay: 4s;
    }
    

    @keyframes animateNavItems{
        from{
            transform: rotateZ(-90deg) rotate(90deg) scale(0.1);
        }
    to{
          transform: rotateZ(0) rotate(0) scale(1);
    }
    }
    .nav-menu li a{
        background: var(--color-primary);
        box-shadow: -2rem 3rem 5rem rgba(0, 0, 0, 0.6);
        width: 100%;
        height: 100%;
        display: grid;
        place-items: center;
    }
    .nav-menu li a:hover{
        background: var(--color-bg2);
        color: var(--color-white);
    }

    /********** header ************/
    header{
        height: 52vh;
        margin-bottom: 4rem;
        top: 4rem;
        
    }
    .header-container{
        gap: 0;
        padding-bottom: 3rem;
    }
    .header-left h1{
        font-size: 1.3rem;

    }
    .header-left p{
        font-size: 0.7rem;
    }
    .header-left p{
        margin: 0rem 0 0.5rem;
    }

    /* /************** categories **************/
    .categories{
        height: auto;

    }
    .categories-container{
        grid-template-columns: 1fr;
        gap: 3rem;
    }
    .categories-left{
        margin-right: 0;
    }

    /*************** popular courses **************/
    .courses{
        margin-top: 0;
    }
    .courses-container{
        grid-template-columns: 1fr 1fr;
    }
    /******** faqs ***********/
    .faqs-container{
        grid-template-columns: 1fr;
    }
    .faq{
        padding: 1.5rem;
    }
    /* footer */
    .footer-container{
        grid-template-columns: 1fr 1fr;
    }
  }

  /* media query on phones */
  @media screen and (max-width:600px) {
    .container{
        width: var(--container-width-sm);
    }
    /* navbar */
    .nav-menu{
        right: 3%;
    }
    /* header */
    header{
        height: 100vh;
    }
    .header-container{
        grid-template-columns: 1fr;
        text-align: center;
        margin-top: 0;
        margin-right: 2rem;
        margin-left: 1rem;
    }
    .header-left p{
        margin-bottom: 0.2rem;
        font-size: 0.9rem;

    }

    /* categories */
    .categories-right{
        grid-template-columns: 1fr 1fr;
        gap: 1rem;
    }
    .category{
        padding: 1rem;
    }
    .category-icon{
        margin-top: 4px;
        display: inline-block;
    }

    /* courses */
    .courses .box-container{
        grid-template-columns: 1fr;
    }
    /* testimonials */
    .testimonial-body{
        padding: 1.2rem;
        
    }
    /* footer */
    .footer-container{
        grid-template-columns: 1fr;
        text-align: center;
        gap: 2rem;
    }
    .footer-1 p{
        margin: 1rem auto;
    }
    .footer-socials{
        justify-content: center;
    }

  }

  .courses{
    margin-top: 0;
}
.courses-container{
    grid-template-columns: 1fr 1fr;
}
/******** faqs ***********/
.faqs-container{
    grid-template-columns: 1fr;
}
.faq{
    padding: 1.5rem;
}
/* footer */
.footer-container{
    grid-template-columns: 1fr 1fr;
}


/* media query on extra small */
@media screen and (max-width:400px) {
.container{
    width: var(--container-width-xs);
}
/* navbar */
.nav-menu{
    right: 2%;
}
/* header */
header{
    height: 100vh;
}
.header-container{
    grid-template-columns: 1fr;
    text-align: right;
    margin-top: 0;
    margin-right: 0;
    margin-left: 0;
    overflow: hidden;
}
.header-left p{
    margin-bottom: 1rem;
    font-size: 1rem;

}

/* categories */
.categories-right{
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}
.category{
    padding: 1rem;
}
.category-icon{
    margin-top:2px;
    display: inline-block;
}

/* courses */
.courses .box-container{
    grid-template-columns: 1fr;
}
/* testimonials */
.testimonial-body{
    padding: 1.2rem;
    
}
/* footer */
.footer-container{
    grid-template-columns: 1fr;
    text-align: center;
    gap: 1rem;
}
.footer-1 p{
    margin: 1rem auto;
}
.footer-socials{
    justify-content: center;
}

}