/* general rules & my own library */
:root {
  --mainColor:#673ab7;
  --white:#fff;
  --backgroundGrey:#f2f2f2;
  --paragraphGrey:#888;
  --border:2px solid #673ab7;
  --boxShadow:0 0 20px 0 rgba(34, 34, 34, 0.2);
  --transition:.3s ease-in-out;
}

*{margin: 0;padding: 0;font-family: "Montserrat", sans-serif;scroll-behavior: smooth;}

::-webkit-scrollbar {width: 15px;}

::-webkit-scrollbar-track {background: var(--mainColor);}

::-webkit-scrollbar-thumb {background: #222;border-radius: 5px;}

::-webkit-scrollbar-thumb:hover {background: #555;}

::selection{color: var(--white);background-color: var(--mainColor) ;}

h1,h2,h3,h4,h5,h6{text-transform: uppercase;text-align: center;}

section{padding: 100px 0;text-align: center;}

section:nth-child(odd) {background-color:var(--backgroundGrey)}

section h2 + p {font-weight: 300;line-height: 20px;margin: 20px;}

h2{font-size: 2rem;font-weight: 600;color: var(--mainColor);}

ul , li , a{text-decoration: none;list-style: none;}

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

@media (max-width:991px) {.container{max-width: 92%;}}

.centering{position: absolute;top: 50%;left: 50%;transform: translate(-50%,-50%);}

.row{
  display: grid;
  grid-template-columns: repeat(3,auto);
  gap:20px;
  margin: 5%;
  width: 90%;
}

@media (max-width: 1024px){.row{grid-template-columns: auto;}}

.hero-btn{
  color: var(--white);
  border: 2px solid var(--white);
  padding: 20px 30px;
  text-transform: uppercase;
  transition: var(--transition);
}

.hero-btn:hover{color: var(--mainColor);background-color: var(--white);}
/* general rules & my own library */
/* scroll to top button */
.scroll-to-top{
  position: fixed;
  bottom: 20px;
  right: 20px;
  padding: 10px;
  border-radius: 50%;
  color: var(--mainColor);
  background-color: var(--white);
  width:20px;
  height:20px;
  text-align: center;
  z-index: 10000;
  transition: var(--transition);
}

.scroll-to-top:hover{background-color: var(--mainColor);color: var(--white);}
/* scroll to top button */
/* header */
header{
  position: relative;
  width: 100%;
  min-height: 100vh;
  background: linear-gradient(rgba(103, 58, 183, .5)), url("./imgs/banner.png") center/cover;
}

/* nav */
header nav{
  display: grid;
  gap: 10px;
  grid-template-columns: auto 1fr;
  padding: 25px;
  background: rgba(34, 34, 34,.85) ;
  height: fit-content;
}

header nav .img img{margin: 0 20px;width: 200px;}

header nav .link ul.links{
  display: grid;
  grid-auto-flow: column;
  justify-content: end;
  align-items: center;
  position: relative;
  top: 10px;
}

header nav .link ul.links li{margin: 0 10px;text-transform: uppercase;}

header nav .link ul.links li a{color:var(--white);font-size: 20px;transition: var(--transition);}

header nav .link ul.links li:hover a{color:var(--mainColor)}

header nav .link ul.links li a::after , header nav .link ul.links li a::before{
  content: '';
  width: 0;
  height: 2px;
  background: var(--mainColor);
  transition: var(--transition);
  display: block;
}

header nav .link ul.links li a:hover::after , header nav .link ul.links li a:hover::before{width: 100%;}

header nav .link .fa-bars{display: none;}

@media (max-width: 1024px) {
  header nav .link .fa-bars{
    display: block;
    color: var(--white);
    margin: 10px;
    font-size: 30px;
    cursor: pointer;
    position: absolute;
    right: 30px;
    top: 20px;
  }
  
  header nav .link ul.links{
    z-index: 10;
    background-color:var(--white);
    color: var(--mainColor);
    position: absolute;
    right: 40px;
    top: 85px;
    min-width: 200px;
    transition: var(--transition);
    display: block;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
  }

  header nav .link ul.links::before{
    content: '';
    border-width: 10px; 
    border-style:solid;
    border-color: transparent transparent var(--white) transparent;
    position: absolute;
    right: 5px;
    top: -20px;
  }
  
  header nav .link:hover ul.links{opacity: 1;visibility: visible;transform: translateY(0);}
  
  header nav .link ul.links li{padding: 25px 0;transition: var(--transition);}

  header nav .link ul.links li:hover{padding-left:20px;}

  header nav .link ul.links li:not(:last-child){border-bottom: var(--border);}

  header nav .link ul.links li a{color: var(--mainColor);}

  header nav .link ul.links li a:hover::after , header nav .link ul.links li a:hover::before{width:0;}
}
/* nav */
/* preface */
header .preface{color: var(--white);}

header .preface h1{font-size: 3rem;}

header .preface p{line-height: 2;margin: 50px 0;}
/* preface */
/* courses */
.course .row .course-col{
  background-color:  var(--white);
  border-radius: 10px;
  padding: 25px;
  box-sizing: border-box;
  transition: var(--transition);
}

.course .row .course-col:hover{box-shadow:var(--boxShadow);}

.course .row .course-col h3{font-weight: 600;margin: 10px 0;}

.course .row .course-col p{color: var(--paragraphGrey);}
/* courses */
/* header */
/* campus */
.campus .row .campus-col{border-radius: 10px;position: relative;overflow: hidden;}

.campus .row .campus-col img{border-radius: 10px;width: 100%;height: 100%;object-fit: cover;}

.campus .row .campus-col .layer{
  width: 100%;
  background:transparent;
  height: 100%;
  position: absolute;
  top: 0;
  left: 0;
  transition: var(--transition);
}

.campus .row .campus-col .layer:hover{background: rgba(103, 58, 183, .7);}

.campus .row .campus-col .layer h3{
  width: 100%;
  color: var(--white);
  font-weight: 500;
  font-size: 25px;
  opacity: 0;
  bottom: 0;
  transition: var(--transition);
}

.campus .row .campus-col .layer:hover h3{opacity: 1;bottom: 50%;}
/* campus */
/* facilities */
.facilities .facilities-col{
  border-radius: 10px;
  text-align: left;
  background-color: var(--white);
  padding: 25px;
  transition: var(--transition);
}

.facilities .facilities-col:hover{box-shadow: var(--boxShadow);}

.facilities .facilities-col img{border-radius: 5px;width: 100%;height: 400px;border:var(--border)}

.facilities .facilities-col h3{margin: 15px 0;text-align: left;font-weight: 500;}

.facilities .facilities-col p{color: var(--paragraphGrey);}
/* facilities */
/* testimonials */
.testimonials .row .testimonials-col{
  background-color: var(--backgroundGrey);
  border-radius: 10px;
  text-align: left;
  padding: 25px;
  cursor: pointer;
  display: flex;
  transition: var(--transition);
}

.testimonials .row .testimonials-col:hover{box-shadow: var(--boxShadow);}

.testimonials .row .testimonials-col img{border-radius: 50%;width: 50px;height: 50px;border: var(--border)}

.testimonials .row .testimonials-col .testimonials-container{margin:0 15px;}

.testimonials .row .testimonials-col .testimonials-container p{margin:0 0 15px;color:var(--paragraphGrey);line-height: 1.5;}

.testimonials .row .testimonials-col .testimonials-container h3{font-weight: 600;text-align: left;}

.testimonials .row .testimonials-col .testimonials-container i{color: var(--mainColor);font-size: 20px;margin-top: 10px;}
/* testimonials */
/* call to action */
.call-to-action{
  background: linear-gradient(rgba(34, 34, 34, .6)), url("./imgs/banner2.png") center/cover;
  border-radius: 20px;
  width: 75%;
  margin:100px auto;
}

.call-to-action h2{color: var(--white);margin: 50px 0;}

@media (max-width:768px) {.call-to-action h2{font-size: 1.5rem;}}
/* call to action */
/*footer */
footer{text-align: center;padding: 50px 25px;background-color: var(--backgroundGrey);}

footer p{color: var(--paragraphGrey);margin: 10px;}

footer .about{margin: 25px 0;line-height: 1.5}

footer i{color: var(--mainColor);}

footer .icons{margin: 10px 0;}

footer .icons i{
  border-radius: 50%;
  border: var(--border);
  width: 16px;
  height: 16px;
  padding: 10px;
  cursor: pointer;
}
/*footer */