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

:root {
    --color-primary: #6c63ff;

}

body {
    font-family: 'Montserrat', sans-serif;
    line-height: 1.7;
    color: white;
    background-color: rgb(68, 68, 197);
}

.container {
    width: 80%;
    margin: 0 auto;
}

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: white;
}

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

.btn {
    display: inline-block;
    background-color: white;
    color: black;
    padding: 1rem 2rem;
    border: 1px solid transparent;
    font-weight: 500;
    transition: all 400ms ease;
    margin: 2rem;
}

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

.btn-primary {
    background: aquamarine;
    color: white;
    /* width: 166px; */
}

/* ========================NAVBAR===================*/ 

nav {
    background: transparent;
     width: 100vw;
    height: 5rem;
    position: fixed;
    top: 0;
    z-index: 11;
}
/* ===========to change navebar====== */
.window-scroll{
    background-color: rgb(18, 16, 141);
    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;
}

.nav_menu a:hover {
    color: rgb(157, 236, 232);
}



/* ========================Header==================== */

header {
    position: relative;
    top: 5rem;
    overflow: hidden;
    height: 70vh;
    margin-bottom: 5rem;
}

.header_container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    align-items: center;
    gap: 5rem;
    height: 100%;

}

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



/* ===================================================Categories========================= */

.categories{
    background-color: rgb(27, 116, 189);
    height: 30rem;
}

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

.categories_container{
    display: grid;
    grid-template-columns: 40% 60%;
    gap: 4rem;
}
.categories_left{
margin-right: 2rem;
}

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

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

.category{
    background-color: rgb(56, 40, 207);
    padding: 2rem;
    border-radius: 2rem;
    transition: all 400ms ease;
}


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

.category:nth-child(2) .category_icon{
    background-color: rgb(45, 216, 131);
}

.category:nth-child(3) .category_icon{
    background-color: rgb(25, 153, 89);
}

.category:nth-child(4) .category_icon{
    background-color: rgba(12, 128, 46, 0.685);
}

.category:nth-child(5) .category_icon{
    background-color: rgb(189, 163, 15);
}

.category:nth-child(6) .category_icon{
    background-color: rgb(209, 25, 185);
}


.category_icon{
    background-color: rgba(14, 148, 201, 0.822);
    padding: 0.7rem;
    border-radius: 00.9rem;
}

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

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





/* ======================================Courses==================================================== */



.courses{
    margin-top: 10rem;
}

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

.course{
    background-color: rgb(16, 38, 160);
    text-align: center;
    border: 1px solid transparent;
    transition: all 800ms ease;
}

.course:hover{
    background: transparent;
    border-color: burlywood;

}

.course_info{
    padding: 2rem;
}

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



/* ===================================FAQ=========================================== */


.faqs{
    background-color: rgb(59, 37, 207);
    box-shadow:inset 0 0 3rem rgba(0, 0, 0, .5);
}

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

.faq{
    padding: 2rem;
    display: flex;
    align-items: center;
    gap: 1.4;
    height: fit-content;
    background-color: #6c63ff;
    cursor: pointer;
}

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

.faq_icon{
    align-self: flex-start;
    font-size: 1.2rem;
    margin-right: 1rem;
}

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

.faq.open p{
    display: block;
}


/* ===============================testimonial====================== */


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

.testmonial{
    padding-top: 2rem;
    
}

.avatar{
    width: 6rem;
    height: 6rem;
    border-radius: 50%;
    overflow: hidden;
    margin: 0 auto 1rem;
    border:1rem solid rgba(103, 179, 16, 0.418)  ;
    
}

.testimonial_info{
    text-align: center;
    
}

.testimonial_body{
    background-color:rgb(45, 28, 204);
    padding: 2rem;
    margin-top: 3rem;
    position: relative;
    
}

.testimonial_body::before{
    content:"";
    display: block;
    background: linear-gradient(135deg, transparent, rgb(45, 28, 204), rgb(45, 28, 204), rgb(45, 28, 204)) ;
    width: 3rem;
    height: 3rem;
    position: absolute;
    left: 50%;
    top: -1.5rem;
    transform: rotate(45deg);
    
}



/* ===============================footer=============================== */


footer{
    background: rebeccapurple;
    padding-top: 5rem;
    font-size: 0.9rem;
    box-shadow:inset 0 0 3rem rgba(22, 21, 22, 0.5);
}


.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 0;
    border-top: 1px solid rgb(81, 13, 95);
}





/* =========================MEDIA Queries============ */

@media screen and (max-width : 1024px){
    
.container{
    width: 90%;
}
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: aliceblue;
    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: 100%;
    height: 5.8rem;
    animation: animateNavItems 400ms linear forwards ;
    transform-origin: top right;
    opacity: 0;
}

.nav_menu li:nth-child(2){
    animation-delay: 200ms;
}

.nav_menu li:nth-child(3){
    animation-delay: 400ms;
}

.nav_menu li:nth-child(4){
    animation-delay: 600ms;
}



@keyframes animateNavItems {
    0% {
        transform: rotateZ(-90deg) rotateX(90deg) scale(0.1);
    }
    100% {
        transform: rotateZ(0)   rotateX(0deg) scale(1);
        opacity: 1;
    }
}

.nav_menu li a{
    background: rgb(142, 173, 172);
    box-shadow: -4rem 6rem 10rem rgba(0, 0, 0, .6);
    width: 100%;
    height: 100%;
    display: grid;
    place-items: center;
}

.nav_menu li a:hover{
    background: turquoise;
    color: rgb(61, 124, 179);
}

/* ===================header========================== */
header {
    height: 72vh;
    margin-bottom: 4rem;
}
.header_container{
    gap: 0;
    padding-bottom: 3rem;
}

/* ====================categories===================== */

.categories {
    height: auto;
}
.categories_container{
    grid-template-columns: 1fr;
    gap: 3rem;
}
.categories_left {
    margin-right: 0;
}

/* ===================popular course ======== */
.course {
    margin-top: 0;
}
.course_container{
    grid-template-columns: 1fr 1fr ;
}

/* =====================faq============= */
.faqs_container {
    grid-template-columns: 1fr;
}

.faq {
    padding: 1.5rem;
}

/* ========================footer============== */

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

}


/* ===========================================================
================================MEDIA queries for MOBILE ====
*/

@media screen and (max-width: 600px) {

    .container{
        width: 94%;

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

    /* ==========Header====== */
    header {
        height: 100vh;
    }

    .header_container {
        grid-template-columns: 1fr ;
        text-align: center;
        margin-top: 0;
    }
    .header_left p {
        margin-bottom: 1.3rem;
    }

    /* ==========================CATEGORIES===== */

    .categories_right{
        grid-template-columns: 1fr 1fr;
        gap: 0.7rem;
    }
    
    .category {
        padding: 1rem;
        border-radius: 1rem;
    }
    .category_icon {
        margin-top: 4px;
        display: inline-block;
    }


    /* =========================popular courses=========== */

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

    /* =========================testmonial=================== */

    .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;
}
}