/* =========================================================
   Common CSS
   ========================================================= */

/* ---------------------------------------------------------
   Root
   --------------------------------------------------------- */

:root {
    --color-black: #111;
    --color-white: #fff;
    --color-gray: #636363;
    --color-point: #FF5500;
    --color-brown: #8A6F4F;
    --color-blue: #0877c9;
    --color-green: #009b12;

    --font-main: "Roboto Mono", "SUIT", sans-serif;
    --font-suit: "SUIT", sans-serif;
    --font-roboto: "Roboto Mono", sans-serif;

    --content-width: 1840px;
    --content-padding: 40px;

    --header-height: 78px;
}


/* ---------------------------------------------------------
   Base
   --------------------------------------------------------- */

html {
    scroll-behavior: smooth;
}

body {
    overflow-x: hidden;
    background: var(--color-white);
    color: var(--color-gray);
    font-family: var(--font-main);
    font-size: 16px;
    font-weight: 400;
    line-height: 1.5;
    letter-spacing: 0.02em;
    word-spacing: -0.3em;
    word-break: keep-all;
    padding-top: var(--header-height);
}

body.scroll-lock {
    overflow: hidden;
}

.font-suit {    
    letter-spacing: 0;
    word-spacing: 0.1em;    
}
::selection {
    background: var(--color-black);
    color: var(--color-white);
}

* { transition: all 0.3s ease; }

/* ---------------------------------------------------------
   Accessibility
   --------------------------------------------------------- */

/* 화면에는 보이지 않지만 스크린리더에서는 읽히는 요소 */

.sr-only {
    overflow: hidden;
    position: absolute;
    width: 1px;
    height: 1px;
    margin: -1px;
    padding: 0;
    border: 0;
    clip: rect(0, 0, 0, 0);
    clip-path: inset(50%);
    white-space: nowrap;
}


/* 키보드 포커스 */

:focus-visible {
    outline: 2px solid currentColor;
    outline-offset: 3px;
}


/* ---------------------------------------------------------
   Layout
   --------------------------------------------------------- */

.inner {
    width: min(
        calc(100% - (var(--content-padding) * 2)),
        var(--content-width)
    );
    margin: 0 auto;
}

.section {
    position: relative;
}

.section__inner {
    width: min(
        calc(100% - (var(--content-padding) * 2)),
        var(--content-width)
    );
    margin: 0 auto;
}


/* ---------------------------------------------------------
   Header
   --------------------------------------------------------- */

.header {
    position: fixed;
    top: 0;
    left: 0;
    z-index: 1000;
    width: 100%;
    box-shadow: none;
    transition: box-shadow 0.2s ease;
}

.header.is-scrolled {
    box-shadow: 0px 4px 4px 0px rgba(0, 0, 0, 0.25);
}

.header__inner {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    padding: 0 var(--content-padding);
    box-sizing: border-box;
    height: var(--header-height);
    margin: 0 auto;
    background: #fff;
}

.header__logo {
    flex-shrink: 0;
    max-width: 220px;
}

.header__logo a {
    display: block;
}


/* ---------------------------------------------------------
   Navigation
   --------------------------------------------------------- */

.gnb {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.gnb__list {
    display: flex;
    align-items: center;
    gap: 60px;
}

.gnb__item {
    position: relative;
}

.gnb__link {
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    font-weight: 800;
    color: var(--color-gray);
    transition: color .3s ease;
}

.gnb__link:hover {
    color: var(--color-point);
    transition: color .3s ease;
}


/* ---------------------------------------------------------
   MOBILE MENU BUTTON
   --------------------------------------------------------- */

.header__menu {
    display: none;
    position: relative;
    width: 32px;
    height: 32px;
    margin-left: 20px;
    padding: 0;
    border: 0;
    background: transparent;
    cursor: pointer;
}

/* 햄버거 선 */
.header__menu span {
    position: absolute;
    left: 4px;
    width: 24px;
    height: 2px;
    background: var(--color-gray);
    transition:
        transform 0.3s ease,
        top 0.3s ease,
        opacity 0.2s ease;
}

.header__menu span:nth-child(1) {
    top: 8px;
}

.header__menu span:nth-child(2) {
    top: 15px;
}

.header__menu span:nth-child(3) {
    top: 22px;
}


/* ==================================================
   햄버거 → X
================================================== */

.header__menu[aria-expanded="true"] span {
    background: var(--color-point);
}

.header__menu[aria-expanded="true"] span:nth-child(1) {
    top: 15px;
    transform: rotate(45deg);
}

.header__menu[aria-expanded="true"] span:nth-child(2) {
    opacity: 0;
}

.header__menu[aria-expanded="true"] span:nth-child(3) {
    top: 15px;
    transform: rotate(-45deg);
}

/* ---------------------------------------------------------
   MOBILE NAV
   --------------------------------------------------------- */

.mobile-nav {
    display: none;
    width: 100%;
    overflow: hidden;
    max-height: 0;
    opacity: 0;
    background: var(--color-blue);
    transform: translateY(-10px);
    transition:
        max-height 0.4s ease,
        opacity 0.3s ease,
        transform 0.4s ease;
}


/* 메뉴 열림 */

.mobile-nav.is-open {
    display: block;
    opacity: 1;
    transform: translateY(0);
    max-height: 100%;
}

.mobile-nav__inner {
    width: 100%;
    height: calc(100vh - var(--header-height));
    display: flex;
    justify-content: center;
    align-items: center;
}

.mobile-nav__list {
    margin: 0;
    padding: 0;
    list-style: none;
}

.mobile-nav__list li {
    text-align: center;
}

.mobile-nav__list li+li {
    margin-top: 50px;
}

.mobile-nav__list a {
    color: var(--color-white);
    font-size: 20px;
    font-weight: 800;
    text-decoration: none;
    transition:
        background-color 0.2s ease,
        color 0.2s ease;
}

.mobile-nav__list a:hover {
    color: var(--color-point);
}


/* ---------------------------------------------------------
   Footer
   --------------------------------------------------------- */

.footer {
    color: #fff;
}

.deco--bottom {margin-bottom: 45px;}

.footer__wrap {
    width:100%;
    background: var(--color-blue);
}

.footer__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: 1380px;
    height: 300px;
    margin: 0 auto;
    padding: var(--content-padding);
    gap: 70px;
}

.footer__logo {
    width: 250px;
}

.footer__logo img {
    width: 100%;
}

.footer__date {
    width: 230px;
}

.footer__date img {
    width: 100%;
}

.footer__copyright {
    font-size: 15px;
    line-height: 20px;
}

.footer__copyright p {
    margin: 0;
}

.footer__top {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 51px;
    height: 51px;
    color: var(--color-blue);
    background: var(--color-white);
    border-radius: 100%;
    font-size: 15px;
    font-weight: 700;
}

.footer__top:hover {
    color: var(--color-white);
    background: var(--color-point);
}


/* ---------------------------------------------------------
   Page
   --------------------------------------------------------- */

#wrap {
    position: relative;
    min-width: 320px;
}

#container {
    position: relative;
}

#contents {
    position: relative;
}


/* ---------------------------------------------------------
   Page Title
   --------------------------------------------------------- */

.page-header {
    position: relative;
}

.page-header__title {
    margin: 0;
}

.page-header__description {
    margin-top: 10px;
}


/* ---------------------------------------------------------
   Buttons
   --------------------------------------------------------- */
/*
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    box-sizing: border-box;
    cursor: pointer;
    transition:
        background-color 0.2s ease,
        border-color 0.2s ease,
        color 0.2s ease;
}

.btn:disabled,
.btn.is-disabled {
    cursor: default;
    opacity: 0.5;
    pointer-events: none;
}

.btn--primary {
    background: var(--color-black);
    color: var(--color-white);
}

.btn--outline {
    border: 1px solid var(--color-black);
    background: var(--color-white);
    color: var(--color-black);
}
*/

/* ---------------------------------------------------------
   hover
   --------------------------------------------------------- */

.button .button-bg {
    opacity:1;
}

.button .button-bg__hover {
    opacity:0;
}

.button:hover .button-bg {
    opacity:0;
}

.button:hover .button-bg__hover {
    opacity:1;
}


/* ---------------------------------------------------------
   Form
   --------------------------------------------------------- */

.form-group {
    display: flex;
    flex-direction: column;
}

.form-label {
    display: block;
}

.form-control {
    box-sizing: border-box;
    width: 100%;
    border: 1px solid var(--color-gray-400);
    background: var(--color-white);
}

.form-control::placeholder {
    color: var(--color-gray-400);
}

.form-control:focus {
    border-color: var(--color-black);
}


/* ---------------------------------------------------------
   Image
   --------------------------------------------------------- */

.thumb {
    overflow: hidden;
    position: relative;
}

.thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}


/* ---------------------------------------------------------
   Link
   --------------------------------------------------------- */

.link {
    text-decoration: underline;
    text-underline-offset: 3px;
}

.link:hover {
    text-decoration-thickness: 2px;
}


/* ---------------------------------------------------------
   Text
   --------------------------------------------------------- */

.text-center {
    text-align: center;
}

.text-left {
    text-align: left;
}

.text-right {
    text-align: right;
}


/* ---------------------------------------------------------
   Display
   --------------------------------------------------------- */

.pc-only {
    display: block;
}

.mo-only {
    display: none;
}


/* ---------------------------------------------------------
   Skip Navigation
   --------------------------------------------------------- */

.skip-nav {
    position: fixed;
    top: -100px;
    left: 0;
    z-index: 9999;
    width: 100%;
}

.skip-nav a {
    display: block;
    width: 100%;
    padding: 15px;
    background: var(--color-black);
    color: var(--color-white);
    text-align: center;
}

.skip-nav:focus-within {
    top: 0;
}


/* ---------------------------------------------------------
   Sponsor
   --------------------------------------------------------- */
.main-sponsor {
    padding: 180px 0;
}

.main-sponsor__inner {
    display: flex;
    align-items: flex-start;
    justify-content: center;
    gap: 80px;
    width: min(1400px, calc(100% - 80px));
    margin: 0 auto;
}

.sponsor {
    display: block;
}

.sponsor:first-child {
    flex: 0 0 35%;
}

.sponsor:last-child {
}

.sponsor__title {
    width: auto;
    margin: 0 0 20px;
    color: var(--color-brown);
    font-size: 20px;
    font-weight: 800;
    line-height: 1.4;
}

.sponsor__logos {
    display: flex;
    align-items: center;
    gap: 20px;
}

.sponsor__logos img {
    display: block;
    width: auto;
    max-width: 150px;
    height: 40px;
    object-fit: contain;
}


/* ---------------------------------------------------------
   Responsive
   --------------------------------------------------------- */

/* ==================================================
   TABLET
================================================== */

@media (max-width: 1200px) {

    .header__inner {
        
    }
    
    .gnb {
        display: none;
    }

    .header__menu {
        display: block;
        margin-left: auto;
    }

    .mobile-nav {
        display: block;
    }
    
    .section__inner {
        width: calc(100% - (var(--content-padding) * 2));
    }
    
    .main-sponsor {
        padding: 120px var(--content-padding);
    }
    
    .main-sponsor__inner {
        display: block;
        width: 100%;
    }

    .sponsor {
        display: block;
        text-align: center;
    }

    .sponsor + .sponsor {
        margin-top: 45px;
    }

    .sponsor:first-child {
        width: 100%;
    }

    .sponsor:last-child {
        width: 100%;
    }

    .sponsor__title {
        width: auto;
        font-size: 16px;
    }

    .sponsor__logos {
        display: flex;
        align-items: center;
        justify-content: center;
        flex-wrap: wrap;
        gap: 25px 20px;
    }

    .sponsor:first-child .sponsor__logos {
        gap: 0;
    }

    .sponsor:last-child .sponsor__logos {
        display: flex;
        align-items: center;
        flex-wrap: wrap;
        gap: 25px 20px;
    }

    .sponsor:last-child .sponsor__logos img {
        width: auto;
        max-width: 120px;
        height: 40px;
        margin: 0;
        display: block;
    }
    
    .deco--bottom {
        margin: 0 auto;
        padding: 60px 0 20px;
    }    
    
    .footer__inner {
        height: auto;
        flex-wrap: wrap;
        justify-content: flex-start;
        align-items: flex-end;
        gap: 0;
        padding: 25px var(--content-padding) 40px;
    }

    .footer__logo,
    .footer__date {
        width: 50%;
        margin: 0;
    }

    .footer__logo img {
        display: block;
        width: 70%;
        max-width: 240px;
    }

    .footer__date img {
        display: block;
        width: 65%;
        max-width: 200px;
    }

    .footer__copyright {
        flex-basis: 100%;
        margin-top: 40px;
        font-size: 14px;
        line-height: 20px;
    }
    
    .footer__copyright p {
        display: inline-block;
    }
    
    .footer__copyright p:last-child {
        display: block;
    }

    .footer__top {
        display: none;
    }
}


/* ==================================================
   MOBILE
================================================== */

@media (max-width: 767px) {

    :root {
        --content-padding: 20px;
        --header-height: 65px;
    }

    body {
        font-size: 14px;
    }

    .pc-only {
        display: none !important;
    }

    .mo-only {
        display: block !important;
    }

    .header__inner {
        height: var(--header-height);
        padding: 0 20px;
    }

    .header__logo {
        font-size: 14px;
    } 
    
    .header__logo img {
        max-height: 15px;
    }
    
    .main-sponsor {
        padding: 0px 20px 0;
    }
    
    .sponsor {
        text-align: left;
    }

    .sponsor__logos {
        justify-content: flex-start;
        max-width: 400px;
    }

    .sponsor:last-child .sponsor__logos {
        margin: 0;
        justify-items: start;
    }
    
    .sponsor:last-child .sponsor__logos img {
        width: auto;   
    }
    
    .footer__copyright {
        margin-top: 25px;
        font-size: 9px;
    }
    
}

@media (max-width: 400px) {
    
    .sponsor__title {
        width: auto;
        margin-bottom: 10px;
        font-size: 11px;
    }

    .sponsor:last-child .sponsor__logos {
        width: 100%;
    }

    .sponsor__logos img {
        max-width: 120px;
        height: 25px;
    }
    
    .sponsor:last-child .sponsor__logos img {
        height: 25px;
    }
}