* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;

    --color-primary: #336666;
    --color-primary-1: #2B6F6F;
    --color-primary-2: #023D3D;
    --color-primary-3: #6CA3A3;
    --color-primary-4: #E3EEEE;

    --white-color: #FFFFFF;
    --gray-color: #F9F9F9;
    --gray-color-1: #8F8F8F;
    --gray-color-2: #111111;
    --gray-color-3: #C9C9C9;
}

html {
    font-size: 10px;
    font-family: "Barlow Condensed";
    scroll-behavior: smooth;
}

::selection {
    color:var(--white-color);
    background: var(--color-primary-3);
}

/* CUSTOM SCROLLBAR */
/* Begin */
/* width */
::-webkit-scrollbar {
    width: 15px;
}

/* Track */
::-webkit-scrollbar-track {
    background: var(--gray-color-2);
    border-left: 1px solid var(--color-primary-1);
}

/* Handle */
::-webkit-scrollbar-thumb {
    background: var(--color-primary-2);
}

/* Handle on hover */
::-webkit-scrollbar-thumb:hover {
    background: var(--color-primary-2);
}
/* End */


section {
    padding: 120px;
}

@media(max-width: 600px) {
    section {
        padding: 50px 30px;
    }
}

@media(max-width: 370px) {
    section {
        padding: 50px 30px;
    }
}

.center {
    text-align: center;
}

.mt-1 {
    margin-top: 10px;
}
.mt-2 {
    margin-top: 20px;
}

.btn {
    display: inline-block;
    padding: 8px 15px;
    font-size: 1.7rem;
    color: var(--white-color);
    background-color: var(--color-primary);
    text-decoration: none;
    border-radius: 3px;
    transition: 0.3s;
}

.btn:hover {
    background-color: var(--color-primary-2);
}

button.btn {
    border: none;
    font-family: "Barlow Condensed";
}

h2.title {
    font-size: 5rem;
    color: var(--color-primary);
    transition: 0.3s;
}

@media(max-width: 400px) {
    h2.title {
        font-size: 3.5rem;
    }
}

.app {
    display: grid;
    grid-template-columns: 260px 1fr;
}

/* NAVIGATION */
/* Begin */
nav {
    position: sticky;
    top: 0;
    left: 0;
    height: 100vh;
    color: var(--white-color);
    background-color: var(--gray-color-2);
    text-align: center;
}

nav img.my-photo {
    width: 112px;
    border: 4px solid var(--color-primary);
    border-radius: 100%;
    margin-top: 70px;
}

nav h2 {
    font-size: 2.8rem;
    font-weight: 400;
    margin-top: 30px;
}

nav h2 span {
    font-weight: 700;
}

nav p {
    font-size: 1.4rem;
    color: var(--gray-color-1);
}

nav ul {
    margin-top: 50px;
}

nav ul li a {
    font-size: 2.2rem;
    line-height: 40px;
    color: var(--white-color);
    text-decoration: none;
    transition: 0.3s;
}

nav ul li a:hover {
    color: var(--color-primary);
}

nav .social-media {
    position: absolute;
    bottom: 70px;
    left: 50%;
    transform: translateX(-50%);
}

nav .social-media a {
    position: relative;
    display: inline-block;
    border-radius: 100%;
    /* background-color: var(--color-primary); */
    width: 30px;
    height: 30px;
    color: var(--white-color);
    text-decoration: none;
    font-size: 1.5rem;
    margin: 1px;
}

nav .social-media a img {
    width: 30px;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    transition: 0.3s;
}

nav .social-media a img:hover {
    margin-top: -5px;
    /* filter: grayscale(0.75) contrast(1.5); */
}

.menu-toggle {
    display: none;
    cursor: pointer;
    position: fixed;
    top: 20px;
    left: 20px;
    padding: 2px 8px;
    background-color: var(--color-primary-2);
    border-radius: 6px;
}

@media only screen and (max-width: 994px) {
    .app {
        display: grid;
        grid-template-columns: 1fr;
    }

    nav {
        display: none;
    }

    .menu-toggle {
        display: block;
        position: fixed;
        top: 20px;
        left: 20px;
        z-index: 10000;
    }

    nav.show-menu img.my-photo {
        width: 100px;
        margin-top: 70px;
    }
    
    nav.show-menu h2 {
        font-size: 2.5rem;
        margin-top: 15px;
    }

    nav.show-menu p {
        font-size: 1.2rem;
    }

    nav.show-menu {
        display: block;
        position: fixed;
        top: 0;
        left: 0;
        height: 100vh;
        width: 65%;
        background-color: var(--gray-color-2);
        z-index: 1000;
        padding-top: 0;
        text-align: center;
    }

    nav.show-menu ul {
        margin-top: 15px;
    }

    nav.show-menu ul li a {
        font-size: 2.2rem;
        line-height: 35px;
    }
}

@media only screen and (max-width: 700px) {
    nav.show-menu {
        width: 100%;
    }
}

.bar {
    width: 25px;
    height: 3px;
    background-color: var(--white-color);
    margin: 6px 0;
}
/* End */


/* HEADER */
/* Begin */
header {
    position: relative;
}

header.jumbotron {
    width: 100%;
    height: 100vh;
    background-color: var(--color-primary);
    background: linear-gradient(135deg, rgba(2,61,61,1) 0%, rgba(51,102,102,1) 100%);
}

header.jumbotron .container {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 100%;
    padding: 30px;
}

header.jumbotron h1 {
    color: var(--white-color);
    font-weight: 400;
    font-size: 8rem;
    width: 100%;
    text-align: center;
}

header.jumbotron h1 span {
    font-weight: 700;
}

header.jumbotron p {
    display: none;
    color: var(--gray-color);
    font-size: 3rem;
    text-align: center;
}

header.jumbotron h2 {
    position: absolute;
    bottom: 10px;
    right: 70px;
    transform: translate(50%, 100%);
    color: var(--color-primary-1);
    rotate: -90deg;
    font-size: 11rem;
    font-weight: 400;
}

@media(max-width: 1350px) {
    header.jumbotron h2 {
        top: 50px;
        bottom: 0;
        right: 80px;
        transform: translate(0, 0);
        rotate: 0deg;
        font-size: 9rem;
    }
}

@media(max-width: 994px) {
    header.jumbotron p {
        display: block;
    }

    header.jumbotron h2 {
        top: 70%;
        right: 50%;
        transform: translate(50%, 0);
        rotate: 0deg;
        font-size: 9rem;
    }
}

@media(max-width: 550px) {
    header.jumbotron h1 {
        font-size: 6rem;
    }

    header.jumbotron h2 {
        font-size: 7rem;
    }
}

@media(max-width: 420px) {
    header.jumbotron h1 {
        font-size: 5rem;
    }

    header.jumbotron p {
        font-size: 2.2rem;
    }

    header.jumbotron h2 {
        font-size: 7rem;
    }
}
/* End */



/* ABOUT ME */
/* Begin */
.about-me {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
}

.about-me img {
    width: 350px;
}

.about-me p {
    color: var(--gray-color-2);
    font-size: 2rem;
    margin-top: 35px;
}

@media(max-width: 1300px) {
    .about-me {
        grid-template-columns: 1fr 2fr;
    }

    .about-me img {
        width: 200px;
    }
}

@media(max-width: 1200px) {
    .about-me {
        grid-template-columns: 1fr;
    }

    .about-me img {
        display: none;
    }
}
/* End */

/* PORTFOLIO - GALLERY */
/* Begin */
.gallery {
    background-color: var(--gray-color);
}

.gallery .items {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    margin-top: 50px;
}

.gallery .items .item {
    border: 1px solid var(--color-primary-3);
    border-radius: 3px;
    padding: 55px 140px;
    background-color: var(--white-color);
}

h3.title {
    font-weight: 600;
    font-size: 2.2rem;
    color: var(--color-primary);
}

.gallery .item img {
    width: 60px;
}

.gallery .item p {
    font-size: 2.2rem;
}

@media(max-width: 1700px) {
    .gallery .items .item {
        padding: 55px 80px;
    }
}

@media(max-width: 1410px) {
    .gallery .items .item {
        padding: 50px;
    }
}

@media(max-width: 1200px) {
    .gallery .items {
        grid-template-columns: 1fr;
        gap: 20px;
    }
}
/* End */

/* TECHNOLOGIE, OPROGRAMOWANIE */
/* Begin */
.gallery-skills .items {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 15px;
    margin-top: 50px;
    justify-content: center;
}

.gallery-skills .item {
    background-color: var(--color-primary-4);
    padding: 30px;
    border-radius: 3px;
}

.gallery-skills .item img {
    max-width: 50px;
    max-height: 50px;
    margin-bottom: 10px;
    /* filter: grayscale(1) contrast(1.5); */
    transition: 0.3s;
}

/* .gallery-skills .item img:hover {
    filter: grayscale(0) contrast(1);
} */

.gallery-skills .item h3 {
    font-size: 2.5rem;
    color: var(--gray-color-2);
}

.software {
    background-color: var(--gray-color);
}

@media(max-width: 1600px) {
    .gallery-skills .items {
        grid-template-columns: repeat(4, 1fr);
    }
}

@media(max-width: 1320px) {
    .gallery-skills .items {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media(max-width: 1200px) {
    .gallery-skills .items {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media(max-width: 600px) {
    .gallery-skills .items {
        grid-template-columns: repeat(1, 1fr);
    }
}
/* End */

/* CONTACT */
/* Begin */
.contact-form {
    width: 870px;
    margin: 0 auto;
}

.contact-form form {
    margin-top: 40px;
}

.contact-form label {
    display: inline-block;
    font-size: 2rem;
    margin-top: 10px;
}

.contact-form input,
.contact-form textarea {
    width: 100%;
    padding: 13px 13px;
    font-family: "Barlow Condensed";
    margin-top: 10px;
    border: 1px solid var(--gray-color-3);
    border-radius: 3px;
    background-color: var(--gray-color);
}

.contact-form input:hover,
.contact-form input:focus,
.contact-form textarea:hover,
.contact-form textarea:focus {
    background-color: #fff;
    border-color: var(--color-primary-3);
    outline: 0;
    padding: 12px 12px;
    border-width: 2px;
}

.contact-form textarea {
    height: 150px;
}

@media(max-width: 1200px) {
    .contact-form {
        width: 100%;
    }
}
/* End */


/* Begin */
/* End */


/* Begin */
/* End */

/* Begin */
footer {
    padding: 30px;
    text-align: center;
    font-size: 2rem;
    border-top: 1px solid var(--gray-color-3);
}
/* End */