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

:root {
    --ff-primary: 'Lora', serif;
    --ff-secondary: 'Roboto Slab', serif;

    --fw-reg: 400;
    --fw-bold: 700;

    --clr-light: #fff;
    --clr-dark: #303030;
    --clr-accent: #528acf;

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

    --bs: 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: 800px){
    :root {
        --fs-h1: 4.5rem;
        --fs-h2: 3.75rem;
        --fs-h3: 1.5rem;
        --fs-body: 1.125rem;
    }
}

html{
    scroll-behavior: smooth;
}

/* General Styles */

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;
}

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;
    background: 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:hover{
    transform: scale(1.1);
}

/* 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);
    padding: .25em 1em;
    font-family: var(--ff-secondary);
    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: 200px;
}

.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: transform 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: 1000;
}

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

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

.nav-open .hamburger{
    transform: rotate(0.625turn);
}

.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);
}

.section__subtitle--intro{
    display: inline-block;
}

@media (min-width: 600px){
    .intro {
        display: grid;
        width: min-content;
        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);
    }
}

/* My services section */

.my-services {
    background-color: var(--clr-dark);
    background-image: url(../img/services-bg.png);
    background-size: cover;
    color: var(--clr-light);
    text-align: center;
}

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

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

.services{
    margin-bottom: 4em;
}

.service{
    max-width: 500px;
    margin: 0 auto;
}

@media (min-width: 800px) {
    .services {
        display: flex;
        max-width: 1000px;
        margin-left: auto;
        margin-right: auto;
    }
    .service + .service {
        margin-left: 2em;
    }
}

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

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

@media (min-width: 600px){
    .about-me{
        display: grid;
        grid-template-columns: 1fr 200px;
        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__img{
        grid-area: img;
        position: relative;
        z-index: 2;
    }
}

/* My Work */

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

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

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

.portfolio__img{
    transition: 
        transform 750ms cubic-bezier(0.5, 0, 0.5, 1),
        opacity 250ms linear;
}

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

.portfolio__img:hover,
.portfolio__item:focus .portfolio__img{
    transform: scale(1.2);
    opacity: .75;
}

/* footer */

.footer{
    background: #111;
    color: var(--clr-accent);
    text-align: center;
    padding: 2.5em;
    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;
    margin-left: auto;
    margin-right: auto;
}