*{
    padding: 0;
    margin: 0;
    box-sizing: border-box;
    border: 0;
    outline: 0;
    text-decoration: none;
    list-style: none;
}

:root{
    --color-primary: #a863f3;
    --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: 94%;

    --transition: all 400ms ease;
}

body{
    font-family: 'Montserrat', sans-serif;
    line-height: 1.7;
    color: var(--color-white);
    background-color: var(--color-bg);
}

.container{
    width: var(--container-width-lg);
    margin: 0 auto;
}

.logo{
    font-weight: bold;
    font-size: 1.5rem;
}

section{
    padding: 6rem 0;
}

section h2{
    text-align: center;
    margin-bottom: 4rem;
}

h1,h2,h3,h4,h5{
    line-height: 1.2;
}

h1{
    font-size: 2.4rem;
}

h2{
    font-size: 2rem;
}

h3{
    font-size: 1.6rem;
}

h4{
    font-size: 1.3rem;
}

a{ color: var(--color-white);}

img{
    width: 100%;
    display: block;
    object-fit: cover;
}

.btn{
    display: inline-block;
    background-color: var(--color-white);
    color: var(--color-black);
    padding: 1rem 2rem;
    border: 1px solid transparent;
    font-weight: 500;
    transition: var(--transition);
}

.btn:hover{
    color: var(--color-white);
    background-color: transparent;
    border-color: var(--color-white);
}

.btn-primary{
    background-color: var(--color-danger);
    color: var(--color-white);
}


/* navbar */

nav{
    background: transparent;
    width: 100%;
    height: 5rem;
    position: sticky;
    top: 0;
    z-index: 11;
}

.window-scroll{
    background-color: 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: rgb(136, 22, 106);
}


/* header */

header{
    height: 88vh;
    /* background: #000; */
    overflow: hidden;
    margin-bottom: -40px;
}

.header_container{
    display: grid;
    grid-template-columns: 1fr 1fr;
    align-items: center;
    height: 100%;
}

.header_left p{
    margin: 1rem 0 2.4rem;
}


/* categories */



.categories{
    background-color: var(--color-bg1);
    height: 29rem;
}

.categories h1{
    line-height: 1;
    margin-bottom: 3rem;
}

.categories_container{
    display: grid;
    grid-template-columns: 40% 60%;
}

.categories_left p{
    margin: 1rem 0 3rem;
}

.categories_left{
    margin-right: 4rem;
}

.categories_right{
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.2rem;
}

.category {
    background-color: var(--color-bg2);
    padding: 2rem;
    border-radius: 2rem;
    transition: var(--transition);
}

.category:hover{
    box-shadow: 0 3rem 3rem rgba(0, 0, 0, 0.3);
    z-index: 1;
}

.categories_icon{
    display: block;
    background-color: var(--color-primary);
    padding: 1rem;
    border-radius: 0.9rem;
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.category h5{
    margin: 2rem 0 1rem;
}

.categories_icon img{
    width: 40px;
    height: 40px;
}

.category p{
    font-size: 0.85rem;
}

.category:nth-child(2) .categories_icon{
    background-color: var(--color-danger);
}

.category:nth-child(3) .categories_icon{
    background-color: var(--color-warning);
}

.category:nth-child(4) .categories_icon{
    background-color: var(--color-success);
}

.category:nth-child(5) .categories_icon{
    background-color: var(--color-black);
}

.category:nth-child(6) .categories_icon{
    background-color: var(--color-white);
}



/* courses */
.courses{
    margin-top: 200px;
}

.courses_container{
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.course{
    background-color: var(--color-bg1);
    text-align: center;
    border: 1px solid transparent;
    transition: var(--transition);
}

.course:hover{
    background: transparent;
    border-color: var(--color-primary);
}

.course_info{
    padding: 2rem;
}

.course_info p{
    margin: 1.2rem 0 2rem;
    font-size: 0.9rem;
}

.course_image img{
    height: 250px;
    object-fit: cover;

}




/* faq */

.faqs>h2{
    text-align: center;
    margin-bottom: 50px;
}

.faqs{
    background-color: var(--color-bg1);
    box-shadow: inset 0 0 3rem rgba(0, 0, 0, 0.6);
    padding: 80px 0;
}

.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: linear-gradient(-45deg,var(--color-primary), var(--color-success));
    cursor: pointer;
}

.faq h4{
    font-size: 1rem;
    line-height: 2.2;
}

.faq_icon{
    align-self: flex-start;
    font-size: 1.2rem;
}

.faq p {
    margin-top: 0.8rem;
    display: none;
}

.faq.open p{
    display: block;
}



/* testimonial */

.testimonials_container{
    overflow-x: hidden;
    position: relative;
    margin-bottom: 5rem;
}

.testimonial{
    padding-top: 2rem;
}

.avtar{
    width: 6rem;
    height: 6rem;
    border-radius: 50%;
    overflow: hidden;
    margin: 0 auto 1rem;
    border:  1rem solid var(--color-primary);
}

.testimonial_info{
    text-align: center;
}

.testimonial_body{
    background-color: var(--color-primary);
    background: linear-gradient(to top,#5132ff, var(--color-primary), 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));
    width: 3rem;
    height: 3rem;
    position: absolute;
    left: 50%;
    top: -1.5rem;
    transform: rotate(45deg) ; */

        content: "";
        position: absolute;
        top: -4.55rem;
        left: 50%;
        transform: translateX(-50%) rotate(180deg);
        border: 3rem solid var(--color-primary);
        border-color: transparent;
        border-top-color: var(--color-primary);

    
}




/* footer */

footer{
    background-color: 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: 1.2rem 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 0;
    border-top: 1px solid var(--color-bg2);
}







@media screen and (max-width: 1024px) {
    .container{
        width: var(--container-width-md);
    }

    h1{
        font-size: 2.2rem;
    }

    h2{
        font-size: 1.7rem;
    }

    h3{
        font-size: 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;
        margin-top: 1rem;
        top: 5rem;
        right: 5%;
        height: fit-content;
        width: 18rem;
        flex-direction: column;
        gap: 10px;
        display: none;
    }

    .nav_menu li{
        width: 100%;
        height: 5.8rem;
        animation: animateNavItem 1s forwards;
        opacity: 0;
    }

    .nav_menu li:nth-child(2){
        animation-delay: 0.5s;
    }
    .nav_menu li:nth-child(3){
        animation-delay: 1s;
    }
    .nav_menu li:nth-child(4){
        animation-delay: 1.5s;
    }

    @keyframes animateNavItem {
        0%{
            transform: translateX(-100vw);
        }
        50%{
            transform: translateX(-30vw);
            opacity: 0;
        }
        100%{
            transform: translateX(0);
            opacity: 1;
        }
    }
    
    .nav_menu li a{
        background: var(--color-primary);
        box-shadow: -4rem 6rem 10rem rgba(0, 0, 0, 0.6);
        width: 100%;
        height: 100%;
        display: grid;
        place-items: center;
        border-radius: 5px;
        font-size: 2rem;
    }

    .nav_menu li a:hover{
        background: var(--color-bg2);
        color: var(--color-white);
    }



    /* header */

    header {
        
    }

    .header_container{
        gap: 0;

    }



    /* categories */

    .categories{
        height: auto;
    }

    .categories_container{
        grid-template-columns: 1fr;
        gap: 3rem;
    }

    .categories_left{
        margin-right: 0;
    }


    /* popular courses */

    .courses{
        margin-top: 0rem;
    }

    .courses_container{
        grid-template-columns: repeat(2, 1fr);
    }



    /* faq */

    .faqs_container{
        grid-template-columns: 1fr;
    }

    .faq{
        padding: 1.5rem;
    }


    /* footer */

    .footer_container{
        grid-template-columns: 1fr 1fr;
    }


}


/* for phones */

@media screen and (max-width: 600px) {
    .container{
        width: var(--container-width-sm);
    }

    /* navbar */
    .nav_menu{
        right: 3%;
    }

    /* header */
    header{
        height: fit-content;
    }

    .header_container{
        grid-template-columns: 1fr;
        gap: 2rem;
        text-align: center;
        margin-top: 5rem;
    }

    .header_left p{
        margin-bottom: 1.3rem;
    }


    /* categories */
    .categories_right{
        grid-template-columns: 1fr 1fr;
        gap: 0.7rem;
    }

    .category{
        padding: 1rem;
        border-radius: 1rem;
    }

    .categories_icon{
        margin-top: 4px;
    }

    /* courses */
    .courses_container{
        grid-template-columns: 1fr;
    }

    /* footer */
    .footer_container{
        grid-template-columns: 1fr;
        gap: 2rem;
    }
}