*{
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-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: 1.8;
    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;
    border-radius: 15px 15px 0px 0px;

 }

 .btn {
    display: inline-block;
    background-color: var(--color-danger);
    color: var(--color-white);
    padding: 0.5rem 2rem;
    border: 1px solid transparent;
    font-weight: 500;
    transition: var(--transition);
    border-radius: 15px; 
 }

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

 .btn-primary {
    background: var(--color-danger);
    color: var(--color-white);
    border-radius: 10px;
 }
 

 /*  ######################### NAVBAR ######################### */

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

/* change navbar styles on scroll using js */
.window-scroll {
   background: var(--color-primary);
   box-shadow: o 1rem 2rem rgba(0, 0, 0, 0.1);
}

 .nav_container {
    height: 100%;
    display: flex;   
    justify-content: space-between;
    align-items: center;
}
.nav_menu {
    display: flex;
    align-items: center;
    gap: 4rem;
}
nav button {
    display: none;
 }

 .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: 75vh;
   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 1.5rem;
 }
 /*  ######################### NAVBAR ######################### */

 .categories {
   background-color: var(--color-bg1);
   height: 28rem;
 }

 .categories h1 {
   line-height: 1;
   margin-bottom: 2rem;
 }

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

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

.categories_left{
   margin-right: 4rem;

}
.categories_right {
   display: grid;
   grid-template-columns: repeat(3, 1fr);
   gap: 1.2rem;
}
.category {
   background: var(--color-bg2);
   padding: 9px;
   border-radius: 2rem;
   transition: var(--transition);
}

.category:nth-child(1) .categoery_icon {
   background: var(--color-danger); 
}
.category:nth-child(2) .categoery_icon {
   background: chartreuse; 
}
.category:nth-child(3) .categoery_icon {
   background: var(--color-success); 
}
.category:nth-child(4) .categoery_icon {
   background: var(--color-warning); 
}
.category:nth-child(5) .categoery_icon {
   background: var(--color-success); 
}
.category:nth-child(6) .categoery_icon {
   background: var(--color-bg1); 
}
.category:hover {
   box-shadow: 1rem 1rem  white ;
   z-index: 1;
}
.categoery_icon {
   background-color:var(--color-primary);
   padding: 10px;
   border-radius: 2rem;
}
.category h5 {
   margin-top: 16px;;
}
.category p {
   font-size: 0.85rem;
}

/*  ######################### POPULAR COURSES ######################### */

.courses {
   margin-top: 4rem;
}
.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);
   border-radius: 15px;
}

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

}

.course_Info {
   padding: 2rem;
}
.course_Info p {
   margin: 0.5rem 0 1rem;
   font-size: 0.9rem;

}


/*  ######################### FAQS  ######################### */

.faqs {
   background: var(--color-bg1);
   box-shadow: inset 0 0 3rem rgba(0, 0, 0, 0.5);
}
.fqas_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: 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;
}

.faq.open p{
   display: block;
}

/*  ######################### testmonials end  ######################### */

.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:46%;
   top: -1.5rem;
   transform: rotate(45deg);
}

/*  ######################### testmonials end  ######################### */
footer{
   background: var(--color-bg1);
   padding: 2.5rem;
   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: 1rem;
}

.footer_copyright {
   text-align: center;
   margin-top: 1rem;
   padding: 1.2rem 0;
   border-top: 1px solid var(--color-bg);
}







/* ############## media quaries (tab) ############*/
@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 500ms linear;
   transform-origin: top right;
}

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

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

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

 /* ============ FAQS================== */
.fqas_container {
   grid-template-columns: 1fr;
}
.faq {
   padding: 1rem;
}
/* ============ Footer ================== */
.footer_container {
   grid-template-columns: 1fr 1fr;
}
}
/*media queray phone*/
@media screen and (max-width: 600px) {
.container {
      width: var(--container-width-sm);
   }
.nav_menu {
      right: 3%;
   }
 header {
      height: 100vh;
   }
.header_container {
      grid-template-columns: 1fr;
      text-align: center;
      margin-top: 0;
   }
.header__left p {
      margin-bottom: 1.3rem;
   }
.categories_right {
      grid-template-columns: 1fr 1fr;
      gap: 0.7rem;
   }
.category {
      padding: 1rem;
      border-radius: 1rem;
   }
.categoery_icon {
      margin-top: 4px;
      display: inline-block;
   }
.courses_container {
      grid-template-columns: 1fr;
   }
 .testimonial_body {
      padding: 1.2rem;
   }
.footer_container {
      grid-template-columns: 1fr;
      text-align: center;
      gap: 2rem;
   }
.footer_1 p {
      margin: 1rem auto;
   }
.footer_socials {
      justify-content: center;
   }
}


#loading{
   position: fixed;
   top: 50;
   left: 0;
   width: 100vw;
   height: 100vw;
   display: flex;
   justify-content: center ;
   align-items: center;
   background-color: aliceblue;
   transform: translateX(-50%);
   transform: translateY(-25%);
   transition: opacity 0.75s, visibility 0.75s;
 }

 #loading-hidden{
   opacity: 0;
   visibility: hidden;

 }
 
 #loading::after{
   content: "";
   width: 75px;
   height: 75px;
   border: 15px solid #dddddd;
   border-top-color: #7449f5 ;
   border-radius: 50% ;
   animation: loading 0.75s ease infinite;
 }
 
 @keyframes loading {
   from{
       transform: rotate(0turn);
   }
   to{
       transform: rotate(1turn);
   }
   
 }