style.css

/*Global*/
:root {
    /*Color*/
    --color-white: #ffffff;
    --color-light-white: #eeeeee;
    --color-dart-white: #bdbdbd;
    --color-orange: #e65100;
    --color-dark-orange: #ac1900;
    --color-black: #000000;
    --color-dark-grey: #4d4d4d;
    --color-grey: #616161;
    --color-light-grey: #7c7979;
    --color-light-orange: #ff833a;
    --color-light-yellow: #ffffb1; 
    --color-lemon: #FAFA33;
    ;

    /*Font size*/
    --font-large: 38px;
    --font-medium: 28px;
    --font-regular: 18px;
    --font-small: 16px;
    --font-micro: 14px;
    
    /*Font weight*/
    --weight-bold: 700;
    --weight-semi-bold: 600;
    --weight-regular: 400;

    /*Size*/
    --size-border-radius: 4px;

/*Animation*/
    --animation-duration: 300ms;
}

/*Universal tags*/
    * {
        box-sizing: border-box;
    }

    body {
        margin: 0;
        font-family: 'Open Sans';
        cursor: default;
    }

    a {
        text-decoration: none;
        color: var(--color-dark-grey);
    }

    ul {
        padding-left: 0spx; 
        
    }

    li {
        list-style: none;
        
    }

    button {
        background-color: transparent;
        cursor: pointer;
        border: none;
        outline: none;
    }

/*Typography*/
    h1 {
        font-size: var(--font-medium);
        font-weight: var(--weight-bold);
        color: var(--color-dark-grey);
        margin: 16px 0;
    }

    h2 {
        font-size: var(--font-regular);
        font-weight: var(--weight-semi-bold);
        color: var(--color-black);
        margin: 8px 0;
    }

    h3 {
        font-size: var(--font-small);
        font-weight: var(--font-small);
        color: var(--color-dark-grey);
        margin: 8px 0;
    }

    p {
        font-size: var(--font-small);
        font-weight: var(--font-small);
        color: var(--color-black);
        margin: 4px 0;
    }

/*Navbar*/
    #navbar {
        position: fixed;
        width: 100%;
        display: flex;
        justify-content: space-between;
        background-color: transparent;
        align-items: center;
        padding: 0px;
        transition: all var(--animation-duration) ease-in-out;
        z-index: 1;
    }
    
    #navbar.navbar--dark {
        background-color: var(--color-lemon);
        padding: 0px;
    }

    .navbar__logo {
        font-size: var(--font-medium);
        font-weight: var(--weight-semi-bold);
        color: white;
    }

    .navbar__menu {
        display: flex;
        margin-right: 16px;
        padding-left: auto;
        
    }

    .navbar__menu.open {
        display: block;
    }

    .navbar__menu__item {
        padding: 8px 12px;
        margin: 0 4px;
        cursor: pointer;
        border-radius: var(--size-border-radius);
        float: right;
    }

    .navbar__menu__item:active {
        border: 1px solid white;
    }

    .navbar__menu__item:hover {
        border-color: var(--color-light-white);
        background-color: var(--color-lemon);
    }

    .navbar__toggle-btn {
        position: sticky;
        top: 24px;
        right: 32px;
        font-size: 24px;
        color: var(--color-light-grey);
        display: none;
    }

/*Home*/
    #home {
        background-color: var(--color-white);
        padding: 40px;
        padding-top: 100px;
        text-align: left;
    }
    
    .home__image {
        display: block;
        margin: 0 auto;
    }
    /*
    .home_avatar {
        width: 150px;
        height: 150px;
        border-radius: 50%;
        border: 2px solid var(--color-light-white);
    }
    */
    .home_title,
    .home_description {
        color: var(--color-dark-grey);
    }

    .home__contact {
        font-size: var(--font-regular);
        font-weight: var(--weight-bold);
        margin: 24px;
        padding: 8px 12px;
        border: 2px solid white;
        border-radius: var(--size-border-radius);
        color: var(--color-orange);
        background-color: var(--color-light-white);
    }

    .home__contact:hover {
        background-color: var(--color-dark-grey);
    }

/*Section common*/
    .section {
        text-align: center;
        padding: 50px;     
        margin: auto;
    }

    .section__container {
        max-width: 1200px;
        margin: auto;
    }

/*About*/
    .about__majors {
        display: flex;
        justify-content: center;
        margin: auto;
    }

    .major {
        width: 172px;
        height: 172px;
    }

    .major__icon {
        width: 170px;
        height: 170px;
        line-height: 170px;
        background-color: var(--color-light-orange);
        font-size: 70px;
        border-radius: 25%;
        border: 1px solid var(--color-dark-grey);
        margin-top: 16px;
        margin-bottom: 16px;
        color: var(--color-dark-grey);
    }

    .major__icon i {
        transition: var(--animation-duration);
    }

    .major__icon:hover i{
        color: var(--color-black);
        transform: rotate(-30deg) scale(1.5);
    }
    .major__title,
    .major__description {
        color: var(--color-dark-grey);
        text-align: center;
    }

    .major__description {
        font-size: var(--font-small);
        margin-top: 8px;
    }

    .job {
        align-items: center;
        margin-top: 175px;
    }

    .job__explanation, .job__name, .job__period {
        color: var(--color-dark-grey);
        margin-top: 16px;
    }

    .job__name {
        font-size: var(--font-small);
    }

    .job__period {
        font-size: var(--font-micro);
    }

    .job__explanation {
        font-size: var(--font-small);
    }


/*Skill*/
    #skills {
        background-color: var(--color-light-white);
    }

    .skillset {
        display: flex;
        background-color: var(--color-light-grey);
        color: var(--color-light-white);
        margin: 20px 0;
    }

    .skillset__title, .skillset__etc {
        color: var(--color-light-white)
    }

    .skillset__left {
        flex-basis: 60%;
        background-color: var(--color-dark-grey);
        padding: 20px 40px;
    }

    .skillset__right {
        flex-basis: 40%;
    }

    .skill__description {
        display: flex;
        justify-content: space-between;
        margin: 10px 10px 0 0;
    }

    .skill__bar {
        width: 100%;
        height: 3px;
        background-color: var(--color-grey);
    }

    .skill__value {
        width: 70%;
        height: 3px;
        background-color: var(--color-lemon);
    }

    .skill {
        margin-bottom: 32px;
    }

    .tools {
        background-color: var(--color-grey);
    }

    .tools, .etc {
        padding: 20px;
    }

    .etc__list {
        padding-right: 50px;
    }

/*Work*/
    .category__btn {
        border: 1px solid var(--color-dark-white);
        border-radius: var(--size-border-radius);
        font-size: var(--font-regular);
        padding: 8px 48px;
        background-color: var(--color-light-white);
        position: relative;
    }

    .category__btn.selected,
    .category__btn:hover {
        background-color: var(--color-lemon);
        color: var(--color-dark-white);
    }

    .category__btn.selected .category__count,
    .category__btn:hover .category__count {
        opacity: 1;
        top: 0;
    }

    .category__count {
        border: 1px solid;
        background-color: var(--color-lemon);
        border-radius: 50%;
        color: var(--color-dark-white);
        width: 22px;
        height: 22px;
        display: inline-block;
        line-height: 24px;
        position: absolute;
        top: -20px;
        right:16px;
        opacity: 0;
        animation: all var(--animation-duration) ease-in;
    }

    .work__projects {
        display: flex;
        flex-wrap: wrap;
        justify-content: center;
        opacity: 1;
        transition: all var(--animation-duration) ease-out;
    }

    .work__projects.anim-out {
        opacity: 0.6;
        transform: scale(0.9) translateY(40px);
    }

    .project {
        position: relative;
        display: flex;
        justify-content: center;
        align-items: center;
        width:280px;
        height: 250px;  
        margin: 2px;
        background-color: var(--color-light-white);
    }

    .project.invisible {
        display: none;
    }

    .project_img {
        max-width: 100%;
        max-height: 100%;
    }

    .project__description {
        position: absolute;
        background-color: var(--color-black);
        width: 100%;
        height: 100%;
        top: 0;
        left: 0;
        display: flex;
        flex-direction: column;
        justify-content: center;
        opacity: 0;
        animation: all var(--animation-duration) ease-in;
    }

    .project:hover .project__description {
        opacity: 0.8;
        transform: translateY(10px);
    }

    .project__description h3 {
        color: var(--color-orange);
    }

    .project__description h3:after {
        content: '';
        display: block;
        position: relative;
        left: 50%;
        width: 50px;
        height: 2px;
        transform: translateX(-50%);
        margin-top: 8px;
        background-color: var(--color--orange);
    }

    .work__categories {
        margin: 40px;
    }


/*Contact*/
    #contact {
        background-color: var(--color-light-white);
    } 

    .contact__email,
    .contact__title,
    .contact__rights {
        color: var(--color-dark-grey);
    }

    .contact__title {
        margin: 32px 0;
    }

    .contact__links {
        font-size: var(--font-large);
        margin: 24px 0;
        transition: all var(--animation-duration) ease-in;
    }

    .contact__links i:hover {
        transform: scale(1.1);
        color: var(--color-lemon);
    }

/*For below 768px screen width*/
    @media screen and (max-width: 768px) {
    :root {
        /*Font size*/
        --font-large: 32px;
        --font-medium: 16px;
        --font-regular: 14px;
        --font-small: 12px;
        --font-micro: 10px;
    }

    .navbar__toggle-btn {
        display: block;
        top: 16px;
        right: 16px;
        font-size: var(--font-medium);
        
    }

    #navbar {
        flex-direction: column;
        align-items: flex-start;
    }

    #navbar.navbar--dark {
        padding: 8px;
    }

    .navbar__menu {
        flex-direction: column;
        text-align: center;
        width: 100%;
        display: none;
        color: var(--color-black);
        justify-content: center;
    }

    .navbar__menu.open {
        display: block;
    }

    .section {
        padding: 16px;
        padding-top: 40px;
    }

    .about__majors {
        margin-top: 30px;
        margin-bottom: 0px;
    }

    .major {
        margin-top: 30px;
    }

    .job {
        padding: 16px;
    }

    .skillset {
        flex-direction: column;
    }

    .category__btn {
        margin: 4px 0;
        width: 100%;
    }

    .project {
        flex-grow: 1;
    }
}