*,
    *::before,
    *::after {
        box-sizing:border-box;
    }
/* Custom Properties */

:root {
    --ff-primary: 'Forum', serif;
    --ff-secondary: 'Encode Sans', sans-serif;

    --fw-reg: 300;
    --fw-bold: 900;

    --clr-light: #fff;
    --clr-dark: #19353a;
    --clr-accent: #800000;

    --fs-h1: 3rem;
    --fs-h2: 2.25rem;
    --fs-h3: 1.25rem;
    --fs-body: 1rem;

    --bs: 0.25em 0.25em 0.75em rgba(148, 107, 107, 0.25),
          0.125em 0.125em 0.375em rgba(0,0,0,.15);

}

@media (min-width: 800px) {
    :root {
        --fs-h1: 4.5rem;
        --fs-h2: 3.75rem;
        --fs-h3: 1.5rem;
        --fs-body: 1.25rem;
    }
}

/* General Styles */

html {
    scroll-behavior: smooth;
}


body {
    background: var(--clr-light);
    color: var(--clr-dark);
    margin: 0;
    font-family: var(--ff-primary);
    font-size: var(--fs-body);
    line-height: 1.6;
    padding: 1em 1em;
}

section {
    padding: 5em 2em;
}

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

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

:focus{
    outline: 3px solid var(--clr-accent);
    outline-offset: 3px;
}

/* Buttons */

.btn {
    display: inline-block;
    padding: .5em 2.5em;
    border: 3px solid;
    border-color: var(--clr-accent);
    background-blend-mode: var(--clr-accent);
    color: var(--clr-dark);
    text-decoration: none;
    cursor: pointer;
    font-size: .8rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    font-weight: var(--fw-bold);
    transition: transform 200ms ease-in-out;
}
.btn a {
    color: var(--clr-accent);
}



/* Typography */

h1,
h2,
h3 {
    line-height: 1.1;
    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-reg);
}

section__title--intro strong {
    display: block;
}

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

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

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


/* Header */

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

.logo {
    max-width: 50px;
}

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

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

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

.nav__link {
    color: inherit;
    font-weight: var(--fw-bold);
    font-size: var(--fs-h2);
    text-decoration: none;
}

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

.nav-toggle {
    padding: .5em;
    background: transparent;
    border: 0;
    cursor: pointer;
    position: absolute;
    right: 1em;
    top: 1em;
    z-index: 200;
}

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

.nav-open .nav-toggle {
    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: var(--clr-accent);
    width: 2em;
    height: 3px;
    border-radius: 1em;
    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 */

.intro {
    position: relative;
}

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

@media (min-width: 1000px) {
    .intro {
        display: grid;
        min-width: min-content;
        max-width: 600px;
        background-color: var(--clr-dark);
        color: var(--clr-light);
        margin: 0 auto;
        grid-column-gap: 1em;
        grid-template-areas: 
            "img title"
            "img subtitle";
            grid-template-columns: min-content max-content;
    }

    .intro__img {
        grid-area: img;
        min-width: 250px;
        position: relative;
        z-index: 2;
    }

    .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);
    } 
}

/* Research Interests */

.my-services {
    background-color: var(--clr-light);
    background-size: fill;
    color: black;
/*    text-shadow: -1px 0 black, 0 1px black, 1px 0 black, 0 -1px black;*/
    background-blend-mode:multiply;
    text-align: center;
}

.section__title--services {
    color: var(--clr-dark);
    text-shadow: -1px 0 white, 0 1px white, 1px 0 white, 0 -1px white;
    position: relative;
}

.section__title--services::after {
    content: '';
    display: block;
    width: 25%;
    height: 1px;
    margin: 0.5em auto 1em;
    background: var(--clr-dark);
}

.services {
    margin-bottom: 4em;
}

.service {
    max-width: 502px;
    margin: 0 auto;
}

@media (min-width:800px) {
    .services {
        display: flex;
        max-width: 1000px;
        margin-left: auto;
        margin-right: auto;
    }

    .service + .service {
        margin-left: 2em;
    }
}
.right-align {
    text-align: right;
  }
.left-align {
    text-align: left;
  }
.center-align {
    text-align: center;
  }

/* Bio */

.about-me {
    max-width: 1000px;
    margin: auto;
    font-size: smaller;
}

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

@media (min-width: 600px) {
    .about-me {
    	margin-bottom: 2cm;
    	background-color: var(--clr-dark);
    	color: var(--clr-light);
        display: grid;
        grid-template-columns: 1fr 350px;
        grid-template-areas: 
            "title img"
            "subtitle img"
            "text img";
        grid-column-gap: 2em;
    }

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

    .section__subtitle--about {
        grid-column: 1/-1;
        grid-row: 2;
        position: relative;
        left: -1em;
        width: calc(100% + 2em);
        padding-left: 1em;
        padding-right: calc(200px + 4em);
    }

    .about-me__image {
        grid-area: img;
        position: relative;
        z-index: 2;
    }
}

/* My Work */

.my-work {
    color: var(--clr-dark);
    max-width: 1000px;
    text-align: center;
    margin: 0 auto;
}

.portfolio {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    margin: 0 auto;
}

.portfolio__item {
    background: var(--clr-accent);
    overflow: hidden;
    text-align: left;
}

.portfolio__image {
    transition: 
    transform (750ms cubic-bezier(.5, 0, .5, 1)),
    opacity (250ms linear);
}

.portfolio__item:focus {
    position: relative;
    z-index: 2;
}

.portfolio__image:hover,
.portfolio__item:focus .portfolio__image {
    transform: scale(1,2);
    opacity: .75;
}

/* My research */

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

.section__title--research {
    color: var(--clr-dark);
} 

.section__subtitle--research {
    color: var(--clr-accent);
}

.portfolio {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    margin: 0 auto;
}

.portfolio__item {
    background: var(--clr-light);
    overflow: hidden;
}

.portfolio__image {
    transition: 
    transform (750ms cubic-bezier(.5, 0, .5, 1)),
    opacity (250ms linear);
}

.portfolio__item:focus {
    position: relative;
    z-index: 2;
}

.portfolio__image:hover,
.portfolio__item:focus .portfolio__image {
    transform: scale(1,2);
    opacity: .75;
}

/* Footer */

.footer {
    background: #111;
    color: var(--clr-accent);
    text-align: center;
    padding: 2.5em 0;
    font-size: var(--fs-h3);
}

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

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

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

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

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

.social-list__item {
    margin: 0 .5em;
}

.social-list__link {
    padding: .5em;
}

/* Individual portfolio item styles */

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

.portfolio-item-individual p {
    max-width: 600px;
    
}