html {
  box-sizing: border-box;
  font-size: 62.5%;
}
*, *:before, *:after {
  box-sizing: inherit;
}

/*CUSTOM PROPERTIES*/

:root {
	--ff-primary: 'Source Sans Pro', sans-serif;
	--ff-secondary: 'Source Code Pro', monospace;

	--fw-regular: 300;
	--fw-bold: 900;

	--clr-light: #fff;/*WHITE*/
	--clr-dark: #303030;
	--clr-accent: #16e0bd;

	/*--clr-accent: #FACF5A;
	--clr-dark: #455D7A;*/

	--fs-h1: 4.8rem;
	--fs-h2: 2.7rem;
	--fs-h3: 2rem;
	--fs-body: 1.4rem;

	--bsw: 0.25em 0.25em 0.75em rgba(0, 0, 0, .25), 
		   0.125em 0.125em 0.25em rgba(0, 0, 0, .15);
}

@media (min-width: 768px) {
	:root {
	--fs-h1: 7.2rem;
	--fs-h2: 3.8rem;
	--fs-h3: 2.4rem;
	--fs-body: 1.8rem;
	}
}


/*GENERAL STYLES*/

html {
	scroll-behavior: smooth;
}

body {
	background-color: var(--clr-light);
	color: var(--clr-dark);
	font-family: var(--ff-primary);
	font-size: var(--fs-body);
	line-height: 1.6;
	margin: 0;
}

img {
	display: block;
	max-width: 100%;
}

section {
	padding: 5em 2em;
}

strong { font-weight: var(--fw-bold); }

/*BUTTONS*/

.select-clr {
	border-radius: 50%;
	border: solid 2px;
	background-image: linear-gradient(45deg, #455D7A 50%, #FACF5A 50%);
	height: 2.5rem;
	width: 2.5rem;
	cursor: pointer;
	margin-left: 1.2rem;
}

.original-color {
	background-image: linear-gradient(45deg, #303030 50%, #16e0bd 50%);
}

.btn {
	background-color: var(--clr-accent);
	color: var(--clr-dark);
	cursor: pointer;
	display: inline-block;
	font-size: .8em;
	font-weight: var(--fw-bold);
	letter-spacing: 2px;
	padding: .5em 2.5em;
	text-decoration: none;
	text-transform: uppercase;
	transition: transform 200ms ease-in-out;
}

.btn:hover {
	transform: scale(1.1);
}

/*TYPOGRAPHY*/

h1, h2, h3 {
	line-height: 1;
	margin: 0;
}

h1 { font-size: var(--fs-h1); }
h2 { font-size: var(--fs-h2); }
h3 { font-size: var(--fs-h3); }


.section__title {
	margin-bottom: .25em;
}

.section__title--intro {
	font-weight: var(--fw-regular);
}

.section__title--intro strong {
	display: block;
}

.section__subtitle {
	font-size: var(--fs-h3);
	margin: 0;
}

.section__subtitle--intro,
.section__subtitle--about {
	background-color: var(--clr-accent);
	font-family: var(--ff-secondary);
	margin-bottom: 1em;
	padding: .25em 1em;
}

/*NAVBAR SECTION BEGINS HERE*/

header {
	display: flex;
	justify-content: space-between;
	padding: 1em;
}

.clr-picker-container {
	position: absolute;
	right: 5.5em;
	display: flex;
	justify-content: space-between;
}

.nav {
	background-color: var(--clr-dark);
	color: var(--clr-light);
	position: fixed;
	top: 0;
	bottom: 0;
	left: 0;
	right: 0;
	z-index: 100;

	transform: translateX(100%);
	transition: transform 250ms cubic-bezier(.5, 0, .5, 1);
}

.nav__list {
	list-style: none;
	display: flex;
	flex-direction: column;
	height: 100%;
	justify-content: space-evenly;
	align-items: center;
	margin: 0;
	padding: 0;
}

.nav__link {
	color: inherit;
	font-weight: var(--fw-bold);
	font-size: var(--fs-h3);
	text-decoration: none;
}

.nav__link:hover {
	color: var(--clr-accent);
}

.logo {
	max-width: 150px;
}

.nav-toogle {
	background: transparent;
	border: 0;
	cursor: pointer;
	padding: .5em;
	position: fixed;
	right: 1em;
	top: 1em;
	z-index: 1000;
}

.nav-open .nav {
	transform: translateX(0);
}

.nav-open .nav-toogle {
	position: fixed;
}

.nav-open .hamburger {
	transform: rotate(.625turn);
}

.nav-open .hamburger::before {
	transform: rotate(90deg) translateX(-6px);
}

.nav-open .hamburger::after {
	opacity: 0;
}

.hamburger {
	display: block;
	position: relative;
}

.hamburger,
.hamburger::before,
.hamburger::after {
	background-color: var(--clr-accent);
	border-radius: 1em;
	height: 3px;
	width: 2em;
	transition: transform 250ms ease-in-out;
}

.hamburger::before,
.hamburger::after {
	content: '';
	position: absolute;
	left: 0;
	right: 0;
}

.hamburger::before {top: 6px;}
.hamburger::after {bottom: 6px;}

/*INTRO SECTION BEGINS HERE*/

.intro {
	position: relative;
}

.intro__img {
	box-shadow: var(--bsw);
}

@media (min-width: 768px) {
	.intro {
		display: grid;
		grid-column-gap: 1em;
		grid-template-areas: 
			"img title"
			"img subtitle";
		grid-template-columns: min-content max-content;
		margin: 0 auto;
		width: min-content;
	}

	.intro__img {
		grid-area: img;
		min-width: 250px;
		position: relative;
	}

	.section__subtitle--intro {
		align-self: start;
		grid-column: -1 / 1;
		grid-row: 2;
		text-align: right;

		position: relative;
		left: -1.5em;
		width: calc(100% + 1.5em);
	}
}

/*SKILLS SECTION BEGINS HERE*/

.my-skills {
	background-color: var(--clr-dark);
	background-image: url(../images/skills_img2.jpg);
	background-size: cover;
	background-blend-mode: multiply;
	color: var(--clr-light);
	text-align: center;
}

.section__title--skills {
	color: var(--clr-accent);
	position: relative;
}

.section__title--skills::after {
	background-color: var(--clr-light);
	content: '';
	display: block;
	height: 1px;
	margin: 0.5em auto 2em;
	opacity: 0.25;
	width: 15%;
}

.skills {
	margin-bottom: 4em;
}

@media (min-width: 768px) {
	.skills {
		display: flex;
		max-width: 1000px;
		margin-left: auto;
		margin-right: auto;
	}

	.skill + .skill {
		margin-left: 2em;
	}
}

/*ABOUT ME SECTION BEGINS HERE*/

.about-me {
	max-width: 1000px;
	margin: 0 auto;
}

.about-me__img {
	box-shadow: var(--bsw);
}

@media (min-width: 768px) {
	.about-me {
		display: grid;
		grid-template-columns: 2fr 1fr;
		grid-template-areas: 
			"title img"
			"subtitle img"
			"text img";
		grid-column-gap: 2em;
	}

	.section__title--about {
		grid-area: title;
	}

	.section__subtitle--about {
		grid-area: subtitle;
		grid-column: 1 / -1;
		left: -1em;
		position: relative;
		padding-left: 1em;
		padding-top: .5em;
		width: calc(100% + 1em)
	}

	.about-me__img {
		grid-area: img;
		position: relative;
	}
}

/*PROJECTS SECTION BEGINNS HERE*/

.projects {
	background-color: var(--clr-dark);
	color: var(--clr-light);
	text-align: center;
}

.section__subtitle--projects {
	color: var(--clr-accent);
	font-weight: var(--fw-bold);
	margin-bottom: 2em;
}

.portafolio {
	display: grid;
	grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
	grid-row-gap: 2em;
}

.portafolio__item {
	background-color: var(--clr-accent);
	margin: 0 auto;
	overflow: hidden;
}

.portafolio__img {
	transition: transform 750ms cubic-bezier(.5, 0, .5, 1),
	opacity: 200ms linear;
}

.portafolio__img:hover {
	transform: scale(1.2);
	opacity: .75;
}

/*FOOTER SECTION BEGINNS HERE*/

.footer {
	background: #111;
	color: var(--clr-accent);
	font-size: var(--fs-h3);
	text-align: center;
	padding: 2em 0;
}

.footer a { 
	color: inherit;
	text-decoration: none;
}

.footer__link {
	font-weight: var(--fw-bold);
	margin-bottom: 2em;
}

.footer__link:hover, 
.social-links__link:hover {
	opacity: .7;
}

.footer_link:hover {
	text-decoration: underline;
}

.social-links {
	display: flex;
	list-style: none;
	justify-content: center;
	gap: 2em;
	margin: 3em 0 0;
	padding: 0;
}

/*PORTAFOLIO ITEMS*/

.portafolio-item-individual {
	padding: 0 2em 2em;
	max-width: 1000px;
	margin: 0 auto;
}