/* https://github.com/sefyudem/Responsive-And-Animated-Navbar-With-Multi-level-Drodown */

@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@100;200;300;400;500;600;700;800;900&display=swap');

*{
    padding: 0;
    margin: 0;
    box-sizing: border-box;
}

body{
    font-family: 'Poppins', sans-serif;
    overflow: hidden;
}

ul{
    list-style: none;
}

a{
    text-decoration: none;
}

header{
    position: sticky;
    top: 0px;
    background-color: #60b4df;
    width: 100%;
    z-index: 1000;
}

section{
    position: relative;
    height: 100vh;
    /* width: 100%; */
    background: url('IMG/BrainandNuts1.jpg') no-repeat top center / cover;
    overflow: hidden;
    opacity: 0.65;
}

/* .overlay {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    background-color: rgb(56, 165, 238, 0.5);
} */

/* https://www.divinectorweb.com/2022/06/animated-header-using-css-animation.html */
.banner-area h1 {
	font-size: 100px;
	margin-top: -4vh;
	/* color: #262626; */
    color: #fff;
    text-align: center;
}

.banner-area h3 {
	/* color: #262626; */
    color: white;
	width: 40%;
	text-align: center;
	animation: animate 5s 1;
    text-align: left;
    /* margin: 1vh; */
    margin-left: 5vh;
    /* margin-top: -1vh; */

}
.banner-area {
	width: 100%;
	/* height: 100vh; */
	/* background: url(1.jpg); */
	-webkit-background-size: cover;
	background-size: cover;
	background-position: center center;
	display: flex;
	/* align-items: center; */
	/* justify-content: center; */
	flex-direction: column;
	color: #fff;
}
h1 {
	animation: animate 2s 1;
}

@keyframes animate {
	0% {
		transform: scale(0);
	}
	100% {
		transform: scale(1);
	}
}

/*  background slide show
https://unused-css.com/blog/css-only-background-slider/#slider-generator
https://www.youtube.com/watch?v=mBdQnQbJWHc
*/
/* .slider {
    overflow: hidden;
    width: 100vw;
    height: 100vh;
    position: relative;
   }
    
   .slider .slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    animation: slider 12.5s infinite;
   }
    
   .slider .slide:nth-child(1) {
      background-image: url('/IMG/BrainandNuts.jpg');
      animation-delay: 0s;
   }
   
   .slider .slide:nth-child(2) {
      background-image: url('/IMG/artificial-intelligence-g0dbcd0415_1920.jpg');
      animation-delay: -2.5s;
   }
   
   .slider .slide:nth-child(3) {
      background-image: url('/IMG/finance-financial-performance-concept-illustration.jpg');
      animation-delay: -5s;
   }
   
   .slider .slide:nth-child(4) {
      background-image: url('/IMG/macroeconomics\ economy\ flat\ illustration.jpg');
      animation-delay: -7.5s;
   }
   
   .slider .slide:nth-child(5) {
      background-image: url('/IMG/computer-g3a1a14f12_1920.jpg');
      animation-delay: -10s;
   }
   
   @keyframes slider {
    0%, 16%, 100% {
      transform: translateX(0);
      animation-timing-function: ease;
    }
    20% {
      transform: translateX(-100%);
      animation-timing-function: step-end;
    }
    96% {
      transform: translateX(100%);
      animation-timing-function: ease;
    }
   } */

.container{
    max-width: 65rem;
    padding: 0 2rem;
    margin: 0 auto;
    display: flex;
    position: relative;
}

.logo-container{
    flex: 1;
    display: flex;
    align-items: center;
}

/* תמונה למעלה */
#avatar {
    /*vertical-align: middle;*/
    border-radius: 100%;
    width: 50px;
    height: 50px;
    background-image: url("IMG/DoMathLikeAGirl.jpg");
    cursor: pointer;
    background-size: cover;
    background-position: center;
}

.center {
    display: block;
    /*margin-left: 0.1rem;*/
    margin-right: 0.5rem;
    margin-top: 0.2rem;
    margin-bottom: 0.2rem;
  }

.nav-btn{
    flex: 3;
    display: flex;
}

.nav-links{
    flex: 2;
}

.log-sign{
    display: flex;
    justify-content: center;
    align-items: center;
    flex: 1;
}

.logo{
    color: #fff;
    font-size: 1.1rem;
    font-weight: 600;
    letter-spacing: 2px;
    text-transform: uppercase;
    line-height: 3rem;
}

.logo span{
    font-weight: 300;
}

.btn{
    display: inline-block;
    padding: .5rem 1.3rem;
    font-size: .8rem;
    border: 2px solid #fff;
    border-radius: 2rem;
    line-height: 1;
    margin: 0 .2rem;
    transition: .3s;
    text-transform: uppercase;
}

.btn.solid, .btn.transparent:hover{
    background-color: #fff;
    color: #69bde7;
}

.btn.transparent, .btn.solid:hover{
    background-color: transparent;
    color: #fff;
}

.nav-links > ul{
    display: flex;
    justify-content: center;
    align-items: center;
}

.nav-link{
    position: relative;
    text-align: right;
}

.nav-link > a{
    line-height: 3rem;
    color: #fff;
    padding: 0 .8rem;
    letter-spacing: 1px;
    font-size: .95rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    transition: .5s;
}

.nav-link > a > i{
    margin-left: .2rem;
}

.nav-link:hover > a{
    transform: scale(1.1);
}

.dropdown{
    position: absolute;
    top: 100%;
    left: 0;
    width: 10rem;
    transform: translateY(10px);
    opacity: 0;
    pointer-events: none;
    transition: .5s;
}

.dropdown ul{
    position: relative;
}

.dropdown-link > a{
    display: flex;
    background-color: #fff;
    color: #3498db;
    padding: .5rem 1rem;
    font-size: .9rem;
    align-items: center;
    justify-content: space-between;
    transition: .3s;
}

.dropdown-link:hover > a{
    background-color: #3498db;
    color: #fff;
}

.dropdown-link:not(:nth-last-child(2)){
    border-bottom: 1px solid #efefef;
}

.dropdown-link i{
    transform: rotate(-90deg);
}

.arrow{
    position: absolute;
    width: 11px;
    height: 11px;
    top: -5.5px;
    left: 32px;
    background-color: #fff;
    transform: rotate(45deg);
    cursor: pointer;
    transition: .3s;
    z-index: -1;
}

.dropdown-link:first-child:hover ~ .arrow{
    background-color: #3498db;
}

.dropdown-link{
    position: relative;
}

.dropdown.second{
    top: 0;
    left: 100%;
    padding-left: .8rem;
    cursor: pointer;
    transform: translateX(10px);
}

.dropdown.second .arrow{
    top: 10px;
    left: -5.5px;
}

.nav-link:hover > .dropdown,
.dropdown-link:hover > .dropdown{
    transform: translate(0, 0);
    opacity: 1;
    pointer-events: auto;
}

.hamburger-menu-container{
    flex: 1;
    display: none;
    align-items: center;
    justify-content: flex-end;
}

.hamburger-menu{
    width: 2.5rem;
    height: 2.5rem;
    display: flex;
    align-items: center;
    justify-content: flex-end;
}

.hamburger-menu div{
    width: 1.6rem;
    height: 3px;
    border-radius: 3px;
    background-color: #fff;
    position: relative;
    z-index: 1001;
    transition: .5s;
}

.hamburger-menu div:before,
.hamburger-menu div:after{
    content: '';
    position: absolute;
    width: inherit;
    height: inherit;
    background-color: #fff;
    border-radius: 3px;
    transition: .5s;
}

.hamburger-menu div:before{
    transform: translateY(-7px);
}

.hamburger-menu div:after{
    transform: translateY(7px);
}

#check{
    position: absolute;
    top: 50%;
    right: 1.5rem;
    transform: translateY(-50%);
    width: 2.5rem;
    height: 2.5rem;
    z-index: 90000;
    cursor: pointer;
    opacity: 0;
    display: none;
}

#check:checked ~ .hamburger-menu-container .hamburger-menu div{
    background-color: transparent;
}

#check:checked ~ .hamburger-menu-container .hamburger-menu div:before{
    transform: translateY(0) rotate(-45deg);
}

#check:checked ~ .hamburger-menu-container .hamburger-menu div:after{
    transform: translateY(0) rotate(45deg);
}

@keyframes animation{
    from{
        opacity: 0;
        transform: translateY(15px);
    }
    to{
        opacity: 1;
        transform: translateY(0px);
    }
}

@media (max-width: 920px){
    .hamburger-menu-container{
        display: flex;
    }

    #check{
        display: block;
    }

    .nav-btn{
        position: fixed;
        height: calc(100vh - 3rem);
        top: 3rem;
        left: 0;
        width: 100%;
        background-color: #69bde7;
        flex-direction: column;
        align-items: center;
        justify-content: space-between;
        overflow-x: hidden;
        overflow-y: auto;
        transform: translateX(100%);
        transition: .65s;
    }

    #check:checked ~ .nav-btn{
        transform: translateX(0);
    }

    #check:checked ~ .nav-btn .nav-link,
    #check:checked ~ .nav-btn .log-sign{
        animation: animation .5s ease forwards var(--i);
    }

    .nav-links{
        flex: initial;
        width: 100%;
    }

    .nav-links > ul{
        flex-direction: column;
    }

    .nav-link{
        width: 100%;
        opacity: 0;
        transform: translateY(15px);
    }

    .nav-link > a{
        line-height: 1;
        padding: 1.6rem 2rem;
    }

    .nav-link:hover > a{
        transform: scale(1);
        background-color: #50a9d6;
    }

    .dropdown, .dropdown.second{
        position: initial;
        top: initial;
        left: initial;
        transform: initial;
        opacity: 1;
        pointer-events: auto;
        width: 100%;
        padding: 0;
        background-color: #3183ac;
        display: none;
    }
    
    .nav-link:hover > .dropdown,
    .dropdown-link:hover > .dropdown{
        display: block;
    }

    .nav-link:hover > a > i,
    .dropdown-link:hover > a > i{
        transform: rotate(360deg);
    }

    .dropdown-link > a{
        background-color: transparent;
        color: #fff;
        padding: 1.2rem 2rem;
        line-height: 1;
    }

    .dropdown.second .dropdown-link > a{
        padding: 1.2rem 2rem 1.2rem 3rem;
    }

    .dropdown.second .dropdown.second .dropdown-link > a{
        padding: 1.2rem 2rem 1.2rem 4rem;
    }

    .dropdown-link:not(:nth-last-child(2)){
        border-bottom: none;
    }

    .arrow{
        z-index: 1;
        background-color: #69bde7;
        left: 10%;
        transform: scale(1.1) rotate(45deg);
        transition: .5s;
    }

    .nav-link:hover .arrow{
        background-color: #50a9d6;
    }

    .dropdown .dropdown .arrow{
        display: none;
    }

    .dropdown-link:hover > a{
        background-color: #3a91bd;
    }

    .dropdown-link:first-child:hover ~ .arrow{
        background-color: #50a9d6;
    }

    .nav-link > a > i{
        font-size: 1.1rem;
        transform: rotate(-90deg);
        transition: .7s;
    }

    .dropdown i{
        font-size: 1rem;
        transition: .7s;
    }

    .log-sign{
        flex: initial;
        width: 100%;
        padding: 1.5rem 1.9rem;
        justify-content: flex-start;
        opacity: 0;
        transform: translateY(15px);
    }
}