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

}
:root{
--color-primary:#6c63ff;
--color-success:#00bfbe;
--color-warning:#f7c94b;
--color-danger:#f75842;
--color_danger-rgba: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: 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,h6{
    line-height: 1.2;
    text-transform: capitalize;
}
h1{
    font-size: 2.4rem;

}
h2{
    font-size: 2rem;
}
h3{
    font-size: 1.6rem;
}
h4{
    font-size: 1.3rem;
}

a{
    color: var(--color-white);
    text-transform: capitalize;
}
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 start here */
nav{
    background:transparent;
    width: 100vw;
    height: 5rem;
    position: fixed;
    top:0;
    z-index: 11;
}
/* IT CHANGR THE NAVBAR ON SCROLL WE USE JS TO TOGGLE TO THIS STYLE */
.windowScroll{
    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{
    text-transform: capitalize;
    font-size: 0.9rem;
    transition:var(--transition);
}
.nav-menu a:hover{
    color: var(--color-bg2);
}


/* header style start here */
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 STYLE */
.categories {
    background: var(--color-bg1);
    height: 29rem;
}
.categories h1{
    line-height: 1;
    margin-bottom: 3rem;
}
.categories-cont{
    display: grid;
    grid-template-columns:40% 60% ;
  
}
.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: 2rem;
    border-radius: 2rem;
    transition: var(--transition);
}
.category:hover{
    box-shadow: 0.3rem 3rem rgba(0, 0, 0, 0.3);
    z-index: 1;
}
.category-icon {
    background: var(--color-primary);
    padding: 0.7rem;
    border-radius: 0.9rem;
}
.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 h5{
    margin: 2rem 0 1rem;
}
.category p{
    font-size: 0.90rem;
}


/* POPULAR COURSES STYLE */
.courses{
    margin-top: 10rem;
}
.courses-cont{
    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{
    background: var(--color-bg1);
    box-shadow: inset 0 0 3rem  rgba(0,0,0,0.5);
}
.faqs-cont{
    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-self: flex-start;
    font-size: 1.2rem;
}
.faq p{
    margin-top: 0.8rem;
    display: none;

}
/* we use javascript to toggle to this class */
.faq.open p{
display: block;
}

/* reviw stylw */
.review-cont{
    overflow-x: hidden;
    position: relative;
    margin-bottom: 5rem;
}
.review{
    padding-top: 2rem;
}
.student-img{
    width: 6rem;
    height: 6rem;
    border-radius: 50%;
    overflow: hidden;
    margin: 0 auto 1rem;
    border: 5px solid var(--color-bg1);
}
.review-info{
    text-align: center;
}
.review-content{
    background: var(--color-primary);
    padding: 2rem;
    margin-top: 3rem;
    position: relative;
}
.review-content::before{
    content: "";
    display: block;
    background: linear-gradient(135deg,transparent,
    var(--color-primary),
    var(--color-primary)
    );
    width: 3rem;
    height: 3rem;
    position:absolute;
    left: 44%;
    /* the half of the height that what is going to give you the top */
    top: -1.5rem;
    transform: rotate(45deg);
}
/*  FOOTER STYLE*/
.footer{
    background: var(--color-bg1);
    padding: 5rem;
    font-size: 0.9rem;
}
.footer_cont{
    display: grid;
    grid-template-columns: repeat(4,1fr);
}
.footer_cont > div h4{
 margin-bottom: 1.2rem;
}
.footer1 p{
    margin: 0 0 2rem;
}
.footer ul li{
    margin-bottom: 0.7rem;
}
.footer ul li a:hover{
    text-decoration: underline;
}
.socials-media{
    display: flex;
    gap: 1rem;
    font-size: 1.2rem;
    margin-top: 2rem;
}
.footer-copyright {
  
     text-align: center;
    margin-bottom: 0;
    padding: 1.2rem 0;
    border-top: 1px solid var(--color-bg2);
}