*{
    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(244,88,86.0.4);
   --color-white:#fff;
   --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: 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: 3.2rem;
}
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: var(--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: 4rem;
    position: fixed;
    top: 0;
    z-index: 11;
}

/* change navbar style scrolling 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-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 ;
}

/* ====================== CATOGARIES ========================= */

.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 p{
    margin: 1rem 0 3rem;
}
.categories__right {
    display: grid;
    grid-template-columns: repeat(3,1fr);
    gap: 1.2rem;
}

.category{
    background: 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;
}
.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;
} 


/* ====================== CATOGARIES ========================= */

.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;
    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 ========================= */

.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: 1rem;
    display: flex;
    align-items: center;
    gap: 1.4rem;
    height: fit-content;
    background: var(--color-primary);
    cursor: pointer;
}
.faq h4{
    font-size: 1rem;
    line-height: 2.2rem;
}
.faq__icon{
    align-self: flex-start;
    font: 1.2rem;
}
.faq p{
    margin-top: 0.8rem;
    display: none;
}
.faq.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: 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;
    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 1s 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(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: 52vh;
    margin-bottom: 4rem;
}

.header__container{
    gap: 0;
    padding-bottom: 3rem;

}
/*================== CATEGORISE ============ */

.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 QUERIES (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;
    }
    .header__left p{
        margin-bottom: 1.3rem;
    }

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

    .categories__right{
        grid-template-columns: 1fr 1fr;
    }
    .category{
        padding: 1rem;
        border-radius: 1rem;
    }
    .category__icon{
        margin-top: 4px;
        display: inline-block;
    }
    /* =========================== POPULAR 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;  
    }
}

}