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

/* css variables  */
:root {
    --color-primary: #6c63ff;
    --color-success: #00bf8e;
    --color-warning: #f7c94b;
    --color-danger: #f75842;
    --color-danger-varient: 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: 76%;
    --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;

}

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: var(--color-white);
    color: var(--color-black);
    padding: 1rem 2rem;
    border: 1px solid transparent;
    font-weight: 500;
    transition: car(--transition);
}

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

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

/* ========NAVBAR========== */
nav {
    background: transparent;
    width: 100vw;
    height: 80px;
    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, 0.3);
}

.nav_container {
    height: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

nav button {
    display: none;
}

.nav_menu {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 4rem;
}

.nav_menu a {
    font-size: 0.9rem;
    transition: var(--transition);
}

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

/* ===========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: var(--color-bg1);
    height: 32rem;

}

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

}

.categories_container {
    display: grid;
    grid-template-columns: 40% 60%;
    /* gap: 4rem; */
}

.categories_left {
    margin-left: 2rem;
}

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

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

.category {
    background: var(--color-bg2);
    padding: 3rem;
    border-radius: 1rem;
    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;
}

/* =========Courses=========== */
.courses {
    margin-top: 10rem;

}

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

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

/* =====Faqs======= */
.faq {
    background: var(--color-bg1);
    box-shadow: inset 0 0 3rem rgba(0, 0, 0, 0.5);
    /* margin-top: 2rem;    */
}

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

.faqs {
    padding: 2rem;
    display: flex;
    gap: 1.4rem;
    cursor: pointer;
    background: var(--color-primary);
    align-items: center;
    height: fit-content;
}

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

.faq h4 {
    font-size: 1rem;
    line-height: 2;
}

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

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

.faqs.open p {
    display: block;
}

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

.testimonial {
    padding-top: 2rem;
}

.avatar {
    width: 6rem;
    height: 6rem;
    border-radius: 50%;
    overflow: hidden;
    margin: 0 auto 1rem;
    border: 1rem solid var(--color-bg1);
}

.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: 50%;
    top: -1.5rem;
    transform: rotate(45deg);
}
/* ========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 0;
    border-top: 1px solid var(--color-bg2);
}

/* =======Media Queries Tablets==== */
 @media screen and (max-width: 1024px){
    .container{
        width:var(--container-width-md)
    }
    h1{
        font-size: 2rem;
    }
    h2{
        font-size: 1.7rem;
    }
    h3{
        font-size: 1.3rem;
    }
    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: 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: 300ms;
}
.nav_menu li:nth-child(4){
    animation-delay: 400ms;
}

@keyframes animateNavItems{
    0%{
transform: rotateZ(-90deg) rotateX(90deg) scale(0.1);
    }
    100%{
transform: rotateZ(0) rotateX(0) scale( 1);
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;
}
.nav_menu li a:hover{
    background: var(--color-bg2);
    color: var(--color-white);
}
/* =========Header======== */
header{
    height: auto;
    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;
}
/* ======Courses========= */
.courses{
    margin-top: 0;

}
.courses_container{
    grid-template-columns: 1fr 1fr;
}
/* FAqs */
.faqs_container{
    grid-template-columns: 1fr;
}
.faqs{
    padding: 1.5rem;
}
/* ====Footer====== */
.footer_container{
    grid-template-columns: 1fr 1fr;

}
 }

 /* ===========Media Queries(Phones)======= */
@media screen and (max-width:600px){
    .container{
        /* background: red; */
        width:var(--container-width-sm)
    }
    /* ========NavbAr */
.nac_menu{
    right: 3%;
}
/* =======Header===== */
header{
    height: 100vh;
}
.header_container{
    grid-template-columns: 1fr;
    text-align: center;
    margin-top: 0; 
}
.header_left{
    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;         
}
/* ========Courses======== */
.courses_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;
    
}
}