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

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

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

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

    --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: 900px) {
    :root {
        --fs-h1: 4.5rem;
        --fs-h2: 3.75rem;
        --fs-h3: 1.5rem;
        --fs-body: 1.125rem;
    }
}

/* General styles */

html {
    scroll-behavior: smooth;
    overscroll-behavior: none;
}

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: 1em 2em;
}

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

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

/* 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;
    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;
}

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

.logo {
    max-width: 100px;
}

.logo-title {
    font-family: "Poppins", system-ui, sans-serif;
    font-size: 1.5rem;
    font-weight: var(--fw-reg);
    letter-spacing: 0.08em;
    color: var(--clr-dark);
}


.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: 2em;
    z-index: 1000;
}

.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: 900px) {
    .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: 300px;
        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.jpg);
    background-size: cover;
    background-blend-mode: overlay;
    color: var(--clr-light);
    text-align: center;
}

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

.section__title--services::after {
    content: '';
    display: block;
    width: 3em;
    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;
}

.tech-list {
    list-style: none;
    padding: 0;
    margin: 0;
    margin-top: 1em;
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.tech-list li {
    padding: 0.2rem 0.6rem;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.15);
    font-size: 0.85rem;
    letter-spacing: 0.03em;
}


@media (min-width: 900px) {
    .services {
        display: flex;
        max-width: 1000px;
        gap: 2em;
        margin-left: auto;
        margin-right: auto;
    }
}

/* About me section */

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

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

@media (min-width: 900px) {
    .about-me {
        display: grid;
        grid-template-columns: 1fr 280px;
        grid-template-areas:
            "title img"
            "subtitle img"
            "text img";
            grid-column-gap: 2em;
    }

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

    .section__subtitle--about {
        align-self: start;
        grid-column: 1 / -1;
        grid-row: 2;
        position: relative;
        left: -1em;
        width: calc(100% + 2em);
        padding-left: 2em;
        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;    
}

.section__subtitle--work {
    color: var(--clr-accent);
    font-weight: var(--fw-bold);
    margin-bottom: 1em;
}

.portfolio {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 10px;
}


.portfolio__item {
    background: #555;
    overflow: hidden;
}

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

.portfolio__img:hover {
    transform: scale(1.2);
    opacity: .5;
}

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

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

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

.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;
    gap: 1.5em;
}

.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 img {
    display: block;
    margin: 0 auto;
}

.portfolio-item-individual p,
.portfolio-item-individual ul {
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.creators,
.play-game {
    padding-top: .5em;
}

.creators__list {
    display: flex;
    justify-content: center;
    gap: 1.5em;
    list-style: none;
    padding: 0;
    margin: 1em auto 0;
    max-width: 600px;
}

.creators__list li {
    margin-bottom: 0.25em;
}

.creators__list a {
    color: var(--clr-dark);
    text-decoration: none;
    font-weight: var(--fw-bold);
}

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

/* Center the play section content like the text above */
.play-game, .action-btn {
    text-align: center;
    padding: 0;
}

.play-game p, .action-btn p {
    max-width: 600px;
    margin: 0.5em auto;
}

/* Mobile Apps Section */
.my-mobile-apps {
    background-color: var(--clr-dark);
    color: var(--clr-light);
    text-align: center;
    padding: 3em 2em;
}

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

.section__title--mobile::after {
    content: '';
    display: block;
    width: 3em;
    height: 1px;
    margin: 0.5em auto 1em;
    background: var(--clr-light);
    opacity: 0.25;
}

.section__subtitle--mobile {
    color: var(--clr-accent);
    font-weight: var(--fw-bold);
    margin-bottom: 2em;
    font-size: var(--fs-h3);
}

.mobile-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5em;
    max-width: 1100px;
    margin: 0 auto 2em;
    text-align: left;
}

.mobile-card {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    padding: 1.5em;
    transition: transform 250ms ease, background 250ms ease;
    display: flex;
    flex-direction: column;
    gap: 0.75em;
}

.mobile-card:hover {
    transform: translateY(-4px);
    background: rgba(22, 224, 189, 0.08);
}

.mobile-card__icon {
    font-size: 1.75rem;
}

.mobile-card__title {
    font-size: var(--fs-h3);
    font-weight: var(--fw-bold);
    color: var(--clr-light);
    margin: 0;
}

.mobile-card__desc {
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.974);
    line-height: 1.6;
    margin: 0;
    flex-grow: 1;
}

.mobile-card__tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4em;
    list-style: none;
    padding: 0;
    margin: 0;
}

.mobile-card__tags li {
    padding: 0.15rem 0.55rem;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.15);
    /* background: rgba(22, 224, 189, 0.12);
    border: 1px solid rgba(22, 224, 189, 0.25); */
    font-size: 0.78rem;
    color: white;
    letter-spacing: 0.02em;
}

.mobile-card__link {
    display: inline-flex;
    align-items: center;
    gap: 0.4em;
    color: var(--clr-accent);
    text-decoration: none;
    font-size: 0.85rem;
    font-weight: var(--fw-bold);
    letter-spacing: 0.05em;
    text-transform: uppercase;
    transition: opacity 200ms ease;
}

.mobile-card__link + .mobile-card__link {
    margin-top: 0.35em;
}

.mobile-card__link:hover {
    opacity: 0.7;
}