* {
	box-sizing: border-box;
	font-family: "Fira Sans", sans-serif;
	font-weight: 400;
	font-style: normal;
}

html {
	scroll-behavior: smooth;
	scroll-padding-top: 80px;
}

body {
	margin: 0;
	padding: 0;
}

.navigation {
	display: flex;
	justify-content: center;
	align-items: center;
	width: 100%;
	padding: 10px;
	background: #f9f9f9;
	position: sticky;
	top: 0;
	z-index: 1000;
}

.hamburger {
    display: none;
    font-size: 2rem;
    cursor: pointer;
    color: #000;
    padding: 10px;
}

.close {
	display: none;
	font-size: 2rem;
	cursor: pointer;
	color: #000;
	padding: 20px;
}

.nav-list {
	padding: 15px;
	margin-left: 30%;
	margin-right: auto;
	text-align: center;
}

.nav-list ul {
	display: flex;
	flex-direction: row;
	list-style-type: none;
	margin: 0;
	padding: 0;
	gap: 4rem;
}

.nav-list ul li {
	margin: 0;
}

li a {
	font-family: "Alan Sans", sans-serif;
	font-optical-sizing: auto;
	font-weight: 400;
	font-style: normal;
	letter-spacing: 1px;
	text-align: center;
	text-decoration: none;
	font-size: 1.2rem;
  	padding: 6px 9px;
  	color: black;
  	transition: 0.2s ease-in-out;
}

li a:hover {
  	background-color: black;
  	color: white;
}

.header {
  	display: flex;
  	flex-direction: row;
  	justify-content: space-between;
  	align-items: center;
  	margin: 2.5rem auto;
  	width: 60%;
  	gap: 2rem;
}

.header h1 {
  	margin-top: 25px;
  	font-weight: 600;
}

.header p {
  	margin: 2px 0;
  	line-height: 1.5;
}

.header img {
  	width: 30%;
  	box-shadow: 2px 4px 6px rgba(0, 0, 0, 0.2);
  	border-radius: 6px;
}

.intro .intro-con {
  	margin: 15px 0;
}

.intro p a {
  	text-decoration: none;
  	padding: 5px;
}

.intro p a:hover {
	background-color: black;
	color: white;
}

h2 {
	text-align: center;
}

.bold {
	font-weight: bold;
	margin: 2px 0;
}

.work-experience ul {
	padding-left: 1em;
	margin-bottom: 2.5rem;
}

.work-experience ul li {
	list-style-position: outside;
}

.section-title {
	text-align: left;
}

.about, .education, .work-experience, .research, .contact {
	width: 60%;
	margin: 3.5rem auto;
}

.photo-gallery {
	width: 75%;
	margin: 1.5rem auto 5rem auto;
	display: flex;
	flex-direction: column;
  	border-bottom: 1px solid #2a2d36;
}

.photo-gallery .photos {
	width: 100%;
	display: flex;
	flex-direction: row;
	flex-wrap: wrap;
	justify-content: space-evenly;
	align-items: center;
}

.social {
	justify-content: flex-start;
	padding-left: 2rem;
}

.photo-gallery .photo-card {
	width: 30%;
	display: flex;
	justify-content: center;
	align-items: center;
	padding: 15px;
}

.photo-gallery .photo-card img {
	width: 100%;
}

.gallery-description {
	padding-left: 2.3rem;
}

.gallery-description .title {
	font-weight: bold;
	margin-top: 1rem;
	margin-bottom: 3px;
}

.gallery-description ul {
	padding-left: 1em;
}

.gallery-description ul li {
	list-style-position: outside;
}

.conference {
	width: 65%;
	margin: 0 auto;
}

.icons {
	display: flex;
	flex-direction: column;
	justify-content: space-evenly;
}

.icons a {
	display: flex;
	align-items: center;
	text-decoration: none;
	color: black;
	padding: 5px;
	transition: 0.2s ease-in-out;
}

.icons a:hover {
	color: white;
	background-color: black;
}

.icons a i {
    font-size: 30px;
    margin: 10px;
    margin-right: 15px;
}

.fa-facebook {
	color: blue;
}

.fa-linkedin {
	color: blue
}

.fa-whatsapp {
	color: green;
}

@media (max-width: 768px) {

	.navigation {
		position: fixed;
		height: 100%;
		right: -500px;
		transition: right 0.3s ease-in;
	}

	.close {
		display: block;
		position: absolute;
		top: 5px;
		right: 10px;
	}

	.navigation.active {
		right: 0;
	}

	.hamburger {
		display: flex;
		position: sticky;
		top: 0;
		right: 0;
		padding: 25px;
		justify-content: flex-end;
		background-color: #fff;
	}

	.nav-list {
		margin-left: unset;
		margin: 0 auto;
	}

	.nav-list ul {
		display: flex;
		flex-direction: column;
		width: 100%;
		justify-content: flex-start;
		align-items: center;
	}

  .nav-list ul li {
  		margin: 2px auto;
  }

  .about, .education, .work-experience, .research, .contact {
		width: 85%;
		margin: 2.5rem auto;
	}

  .header {
    	flex-direction: column;
    	width: 90%;
    	text-align: center;
    	margin-top: 5.5rem;
  }

  .header img {
    	width: 85%;
    	margin: 1.5rem auto;
  }

  .header h1 {
    	margin-top: 15px;
    	font-size: 1.6rem;
  }

  .header p {
    	font-size: 1rem;
  }

  .photo-gallery {
  		flex-direction: column-reverse;
  		justify-content: space around;
  		align-items: center;
  		gap: 1rem;
		width: 95%;
  }

  .photo-gallery .photo-card {
  		width: 95%;
  }

  	.photo-gallery .photo-card img {
  		width: 100%;
  	}

  	.gallery-description {
		padding-left: 0;
		padding: 0.2rem 1rem;
		margin: 0.2rem auto;;
	}

	.social {
		justify-content: space-evenly;
		align-items: center;
		padding: unset;
	}

  	.conference, .others {
  		font-size: 1.2rem;
  		padding: 0.5rem;
  		width: 85%;
  		margin: 0 auto;
  	}
}

@media (max-width: 480px) {

  	li a {
    	font-size: 1rem;
    	padding: 4px 7px;
  	}

  	.header h1 {
   		 font-size: 1.4rem;
  	}

  h2 {
  	font-size: 1.2rem;
  }
}