/* Global */
    
     :root {
        /* Color */
        --color-white: #ffffff;
        --color-light-white: #eeeeee;
        --color-dark-white: #bdbdbd;
        --color-dark-grey: #1e272e;
        --color-grey: #8a8a8a;
        --color-light-grey: #d8d8d8;
        --color-mint: #34e7e4;
        --color-black: #0a0a0a;
        /* Font size */
        --font-large: 48px;
        --font-medium: 28px;
        --font-regular: 18px;
        --font-small: 16px;
        --font-micro: 14px;
        /* Font weight */
        --weight-bold: 700;
        --weight-semi-bold: 600;
        --weight-regular: 400;
        --weight-slim: 300;
        /*Size*/
        --size-border-radius: 4px;
        /*Animation*/
        --Animation-duration: 300ms;
        /*Universal tags*/
    }
    
    * {
        box-sizing: border-box;
    }
    
    a {
        text-decoration: none;
        color: var(--color-white);
    }
    
    ul {
        list-style: none;
        padding-left: 0px;
    }
    
    body {
        margin: 0px;
        font-family: 'Oswald', sans-serif;
        cursor: default;
    }
    
    a {
        text-decoration: none;
    }
    
    ul {
        list-style: none;
        padding-left: 0px;
    }
    
    button {
        background-color: transparent;
        cursor: pointer;
        border: none;
        outline: none;
    }
    /* Typography */
    
    h1 {
        color: var(--color-white);
        font-size: var(--font-large);
        font-weight: var(--weight-regular);
    }
    
    h2 {
        font-size: var(--font-medium);
        font-weight: var(--weight-regular);
        color: var(--color-black);
    }
    
    h3 {
        color: var(--color-black);
        font-size: var(--font-small);
        font-weight: var(--weight-regular);
        margin: 8px 0;
    }
    
    h4 {
        font-weight: var(--weight-regular);
    }
    
    p {
        font-size: var(--font-micro);
        font-weight: var(--weight-regular);
        color: var(--color-black);
        margin: 8px 0;
    }
    /* Section Common */
    
    section {
        padding: 60px 20px;
        margin: auto;
    }
    
    .section__container {
        max-width: 1200px;
    }
    /*Navbar*/
    
    #navbar {
        position: fixed;
        width: 100%;
        padding: 0px 40px;
        background-color: var(--color-black);
        display: flex;
        align-items: center;
        justify-content: space-between;
        color: white;
        z-index: 1;
        font-family: 'Oswald', sans-serif;
        border-bottom: 1px solid var(--color-dark-grey);
    }
    
    .menu__list {
        display: flex;
    }
    
    .navbar__menu__item {
        min-width: 75px;
        text-align: center;
        padding: 8px;
        margin: 0px;
        cursor: pointer;
        font-size: var(--font-micro);
    }
    
    .navbar__toggle-btn {
        position: absolute;
        right: 32px;
        top: 16px;
        font-size: 24px;
        color: var(--color-white);
        display: none;
    }
    
    .navbar__menu__item:hover {
        color: var(--color-mint);
    }
    
    .logo {
        width: 160px;
        position: relative;
        top: 4px;
    }
    /* Main */
    
    #main {
        background: url('./img/main/clients.png') center/cover no-repeat;
        text-align: center;
        padding: 160px 104px 30px 104px;
        color: var(--color-white);
    }
    
    #main .main--scroll {
        display: none;
    }
    
    .main__title {
        font-size: 60px;
        margin: 8px 0px;
    }
    
    .main__description {
        margin: 16px 0px 100px 0px;
        color: white;
        font-weight: lighter;
        font-size: 30px;
    }
    
    .main__category {
        max-width: 1000px;
        margin: auto;
    }
    
    .category__btn {
        color: var(--color-white);
        font-size: var(--font-regular);
        font-weight: var(--weight-slim);
        cursor: pointer;
        position: relative;
        padding: 10px 30px;
    }
    
    .category__btn:hover {
        color: var(--color-mint);
        bottom: 2px;
    }
    
    .category__item {
        padding: 8px 16px;
        font-weight: var(--weight-regular);
    }
    /* title */
    
    h2.index__title {
        margin: 0px;
        padding: 0px;
    }
    
    h4.index__title_kor {
        margin: 0px;
        padding: 0px;
    }
    
    #clients01 {
        background-color: var(--color-black);
        padding: 15px 24px;
    }
    
    #sec__2021,
    #sec__2020,
    #sec__2019,
    #sec__2018,
    #sec__2017,
    #sec__2016,
    #sec__2015,
    #sec__2014,
    #sec__2013 {
        max-width: 1000px;
    }
    
    .title {
        padding: 0px 100px;
        display: flex;
        flex-direction: column;
        justify-content: center;
        text-align: center;
    }
    
    .title__count {
        font-weight: var(--font-regular);
        margin-bottom: 30px;
        color: var(--color-white);
    }
    
    .title__eng {
        margin: 0px;
        color: var(--color-white);
        font-size: 33px;
        text-align: center;
    }
    
    .title__kor {
        color: var(--color-white);
    }
    
    .index__title {
        padding-bottom: 50px;
    }
    
    .btn-2021 {
        color: aqua;
    }
    /* clients*/
    
    .container {
        display: flex;
        margin-bottom: 40px;
        justify-content: center;
    }
    
    .container-2021 {
        margin-top: 20px;
    }
    
    .year {
        font-size: 60px;
        height: 672x;
        width: 250px;
        padding-left: 0;
        line-height: 72px;
    }
    
    .contents {
        width: 600px;
    }
    
    .contents__txt {
        display: flex;
        padding-top: 14px;
    }
    
    p.client {
        width: 140px;
        font-size: 18px;
        font-weight: var(--weight-semi-bold);
        line-height: 24px;
        margin-top: 0px;
        margin-bottom: 18px;
    }
    
    p.project-name {
        font-size: 16px;
        line-height: 24px;
        margin-top: 0px;
        margin-bottom: 18px;
    }
    /* winwaybar */
    
    .bar {
        max-width: 1000px;
        height: 1px;
        background-color: #EAEAEA;
        margin: 50px auto;
    }
    
    #winwaybar {
        background-color: var(--color-light-grey);
        padding: 10px 200px;
    }
    
    .winwaybar {
        display: flex;
    }
    
    .winway-logo {
        font-size: var(--font-regular);
        color: var(--color-grey);
        margin-right: 60px;
        line-height: 54px;
    }
    
    .winway-description {
        display: flex;
        flex-direction: column;
        justify-content: center;
    }
    
    .winway-description p {
        font-size: 12px;
        color: var(--color-grey);
        margin: 0px;
    }
    /*Scroll*/
    
    .arrowUp {
        position: fixed;
        z-index: 1;
        font-size: 50px;
        bottom: 60px;
        right: 50px;
        opacity: 0;
        color: var(--color-black);
        transition: all 300ms ease-in-out;
        pointer-events: none;
    }
    
    .arrowUp.visible {
        opacity: 1;
        pointer-events: auto;
    }
    /* For below 768px screen width */
    
    @media screen and (max-width:768px) {
        .navbar__toggle-btn {
            display: block;
        }
        #navbar {
            flex-direction: column;
            align-items: flex-start;
            padding: 8px 30px;
            padding-left: 12px;
            background-color: var(--color-black)
        }
        .logo {
            width: 118px;
            top: 4px;
        }
        .menu__list {
            flex-direction: column;
            display: none;
        }
        .navbar__menu__item {
            padding-bottom: 16px;
            text-align: left;
        }
        .menu__list.open {
            display: block;
        }
        /* title */
        #title {
            padding: 0px;
        }
        .title {
            padding: 0px;
            flex-direction: column;
        }
        .category__btn {
            font-size: 16px;
            padding: 12px 12px;
        }
        /* section */
        .section {
            padding: 20px;
        }
        .section__container {
            padding: 20px;
        }
        #main {
            padding: 120px 20px 10px 20px;
        }
        .main__category {
            width: 100%;
        }
        /* clients */
        .clients__lists__container {
            padding: 10px;
            flex-direction: column;
        }
        .clients__lists_1 {
            margin: 0px;
        }
        .clients__lists_2 {
            margin: 0px;
        }
        .clients__name {
            font-size: var(--font-micro);
            padding: 4px;
            min-width: 110px;
            min-height: 40px;
        }
        .clients__service {
            padding: 4px;
        }
        .container {
            display: inline;
        }
        .contents {
            margin-top: 20px;
            max-width: 100%;
            padding-left: 18px;
        }
        .contents__txt {
            padding: 0px;
        }
        .year {
            font-size: 52px;
            padding-left: 10px;
            margin-bottom: 18px;
        }
        p.client {
            min-width: 140px;
            font-size: 16px;
        }
        p.project-name {
            font-size: var(--font-micro);
        }
        /* winwaybar */
        #winwaybar {
            padding: 8px 20px;
        }
        .winwaybar {
            display: flex;
        }
        .winway-logo {
            font-size: var(--font-micro);
            line-height: 20px;
        }
        .winway-description p {
            font-size: 8px;
        }
        .bar {
            max-width: 1000px;
            height: 1px;
            background-color: var(--color-light-grey);
            margin: 20px 0px
        }
        .arrowUp {
            font-size: 40px;
            bottom: 60px;
            right: 24px;
        }
    }