@import url("https://cdn.jsdelivr.net/gh/orioncactus/pretendard@v1.3.9/dist/web/variable/pretendardvariable-dynamic-subset.min.css");
@import "reset.css";
@import "nice-select.css";

*, *::before, *::after {box-sizing: border-box;}
html {
    -webkit-touch-callout: none;
     user-select: none;
     -moz-user-select: none;
     -ms-user-select: none;
}
body {
    margin-top: 80px;
	padding: 0;
    
    font-size: 10px;
	font-family: 'Pretendard Variable', Pretendard, sans-serif;
	text-decoration: none;
    letter-spacing: -0.7px;

    overflow-x: hidden;
}
a, button, ul, li {
    background: none;
    margin: 0;
    padding: 0;
    border: 0px;
    list-style: none;

    color: var(--main-black);
	text-decoration: none;
	font-family: 'Pretendard Variable', Pretendard, sans-serif;
}
[hidden] {display: none;}
.scroll::-webkit-scrollbar {display: none;}
.scroll {
  -ms-overflow-style: none;
  scrollbar-width: none;
}
:root {
    --main-yellow: #ffcc33;
    --main-black: #0e0e0e;

    --bgGray: #f7f7f7;
    --lineGray: #cccccc;
    --midGray: #aaaaaa;
    --darkGray: #666666;

    --main-blue: #338BFF;
    --literacy-blue: #1E2C5F;
    --math-green: #2E8526;
}
main {
    position: relative;
    color: var(--main-black);
}

/* header */
header {
    position: fixed;
    top: 0;
    z-index: 99;

    width: 100%;
    background-color: #fff;
    transition: background-color .25s ease, backdrop-filter .25s ease, box-shadow .25s ease;
}
header.is-scrolled {
    background-color: rgba(255, 255, 255, 0.8);
    backdrop-filter: saturate(180%) blur(12px);
    -webkit-backdrop-filter: saturate(180%) blur(12px);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.03);
}
header .inner {
    display: flex;
    justify-content: space-between;
    align-items: center;

    max-width: 1316px;
    padding: 20px;
    margin: 0 auto;
    
    font-size: 1rem;
}
header .inner a.title {
    display: block;
    width: 76px;
    height: 40px;
    cursor: pointer;
}
header .inner a.title h1 {
    width: 100%;
    height: 100%;

    background-position: center;
    background-repeat: no-repeat;
    background-size: contain;
    background-image: url(../img/main/logo_useprep.svg);

    text-indent: -9999px;
}
header .inner .gnb ul {
    display: flex;
    gap: 20px;

    text-align: center;
}
header .inner .gnb ul li {
    padding: 8px 20px;
    font-weight: 600;
}
header .inner .gnb ul li:hover {cursor: pointer;}
header .inner .mypage {
    padding: 8px 20px;
    transition: 0.2s ease-in-out;
    color: var(--main-black);
}
header .inner .mypage:hover {
    color: var(--main-yellow);
    font-weight: 500;
}

/* footer */
footer {
    width: 100%;
    max-width: 1316px;
    margin: 0 auto 40px;

    background: var(--bgGray);
    border-radius: 20px;
}
footer .inner {
    padding: 40px 40px 28px;
    font-size: 16px;
}
footer .inner a.title {
    display: block;
    width: 76px;
    height: 40px;
    cursor: pointer;
}
footer .inner a.title h1 {
    width: 100%;
    height: 100%;

    background-position: center;
    background-repeat: no-repeat;
    background-size: contain;
    background-image: url(../img/main/logo_useprep.svg);

    text-indent: -9999px;
}
footer .inner .container {
    display: flex;
    justify-content: space-between; 
    align-items: center;
    gap: 40px;
    margin-bottom: 20px;
}
footer .inner .terms-box {margin: 30px 0px 20px;}
footer .inner .terms-box li {
    display: inline-block;
    margin-right: 20px;
    font-weight: 600;
}
footer .inner .terms-box li a {color: var(--main-black);}
footer .inner .terms-box li:last-child {margin-right: 0px;}
footer .inner .sns-box ul {
    display: flex;
    gap: 16px;
}
footer .inner .sns-box li {
    flex: 1;
    width: 40px;
    height: 40px;
    border-radius: 100px;
    text-indent: -9999px;

    background-color: rgba(0 0 0 / 5%);
    background-size: 22px 22px;
    background-position: center center;
    background-repeat: no-repeat;
}
footer .inner .sns-box li a {
    display: block;
    width: 100%;
    height: 100%;
    cursor: pointer;
}
footer .inner .sns-box li.cafe {background-image: url(../img/main/icon_info_cafe.png);}
footer .inner .sns-box li.instagram {background-image: url(../img/main/icon_info_instagram.png);}
footer .inner .sns-box li.youtube {background-image: url(../img/main/icon_info_youtube.png);}
footer .inner .sns-box li.blog {background-image: url(../img/main/icon_info_blog.png);}
footer .inner .info-box {word-break: keep-all;}
footer .inner .info-box span {
    position: relative;
    display: inline-block;
    margin: 0px 22px 10px 0px;
}
footer .inner .info-box span:after {
    position: absolute;
    display: inline-block;
    content: "";
    top: 3px;
    width: 1px;
    height: 12px;
    margin-left: 12px;
    background-color: rgba(0 0 0 / 20%);
}
footer .inner .info-box span:nth-child(5)::after,
footer .inner .info-box span:last-child::after {display: none;}

.back-to-top {
    display: none;
    position: fixed;
    right: 12%;
    bottom: 4%;
    width: 50px;
    height: 50px;
    z-index: 9;    
    border-radius: 25px;
    border: 1px solid #dbdbdb;

    background: url(/img/main/back_top.png);
    background-position: center;
    background-size: cover;

    font-size: 14px;
    font-weight: bold;
    color: #6e6e6e;
    text-align: center;
}
/* popup */
#promo-popup {
    position: fixed;
    inset: 0;
    overflow: auto;
    z-index: 9999;
}
.promo-popup__backdrop {
    position: absolute;
    inset: 0;
    background: rgba(0 0 0 / 70%);
}
.promo-popup__content {
    position: relative;
    z-index: 1;
    width: min(92vw, 480px);
    max-height: min(85svh, 680px);
    margin: 8vh auto;
    padding: 0px;
    border-radius: 16px;
    background: var(--bgGray);
    box-shadow: 0 10px 30px rgba(0 0 0 / 50%);
    overflow: auto;
}
.promo-popup__actions {
    display: flex;
    gap: 8px;
    padding: 8px;
}
.promo-popup__btn {
    flex: 1;
    padding: 16px 20px;
    border-radius: 100px;
    cursor: pointer;
    border: 0;

    font-size: 1rem;
}
.promo-popup__btn:hover {background: rgba(0 0 0 / 10%);}
.promo-popup__btn--primary {color: var(--main-black);}
.promo-popup__btn--ghost {color: var(--main-black);}
.popup_img {border-radius: 16px;}
.popup_img img {width: 100%;}

@media (min-width: 1024px) and (max-width: 1279px) {
    footer {
        width: auto;
        max-width: 100%;
        margin: 0px 20px 40px;
    }
    .back-to-top {right: 2%;}
}
@media (min-width: 768px) and (max-width: 1023px) {
    footer {
        width: auto;
        max-width: 100%;
        margin: 0px 20px 40px;
    }
    .back-to-top {right: 2%;}
}
@media (min-width: 480px) and (max-width: 767px) {
    header .inner .gnb ul,
    header .inner .mypage {display: none;}
    header .inner .hamburger {
        display: flex;
        flex-direction: column;
        justify-content: space-between;

        width: 24px;
        height: 16px;

        cursor: pointer;
    }      
    header .hamburger span {
        display: block;
        width: 100%;
        height: 2px;
        background-color: var(--main-black);
        transition: all 0.3s ease;
    }      
    header .hamburger.active span:nth-child(1) {transform: rotate(45deg) translate(4px, 6px);}
    header .hamburger.active span:nth-child(2) {opacity: 0;}
    header .hamburger.active span:nth-child(3) {transform: rotate(-45deg) translate(4px, -6px);}
    .mobile-menu {
        display: block;
        position: fixed; inset: 0;
        background: #fff;
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        z-index: 10;

        margin-top: 56px;
    }
    .mobile-menu.open {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    .mobile-menu .menu-inner {padding: 80px 20px;}
    .mobile-menu ul {
        list-style: none;
        margin: 0;
        padding: 0;
    }
    .mobile-menu li {border-bottom: 1px solid #ededed;}
    .mobile-menu a {
        display: block;
        padding: 20px 4px;

        color: var(--main-black);
        font-size: 1.25rem;
        text-decoration: none;
    }
    footer {
        width: auto;
        max-width: 100%;
        margin: 0 auto;
        border-radius: 0px;
    }
    footer .inner {padding: 60px 20px;}
    footer .inner .terms-box {margin: 30px 0px 28px;}
    footer .inner .terms-box li a {display: block; margin-bottom: 16px;}
    footer .inner .terms-box li:last-child a {margin-bottom: 0px;}
    footer .inner .container {margin-bottom: 28px;}
    footer .inner .info-box span {margin: 0px 22px 16px 0px;}
    .back-to-top {right: 2%;}
}
@media (max-width: 479px) {
    body {margin-top: 56px;}
    header .inner {
        display: flex;
        justify-content: space-between;
        align-items: center;
    
        max-width: 1316px;
        padding: 12px 20px;
        margin: 0 auto;
        
        font-size: 1rem;
    }
    header .inner a.title {
        display: block;
        width: 60px;
        height: 32px;
        cursor: pointer;
    }
    header .inner .gnb ul,
    header .inner .mypage {display: none;}
    header .inner .hamburger {
        display: flex;
        flex-direction: column;
        justify-content: space-between;

        width: 24px;
        height: 16px;

        cursor: pointer;
    }      
    header .hamburger span {
        display: block;
        width: 100%;
        height: 2px;
        background-color: var(--main-black);
        transition: all 0.3s ease;
    }      
    header .hamburger.active span:nth-child(1) {transform: rotate(45deg) translate(4px, 6px);}
    header .hamburger.active span:nth-child(2) {opacity: 0;}
    header .hamburger.active span:nth-child(3) {transform: rotate(-45deg) translate(4px, -6px);}    
    .mobile-menu {
        display: block;
        position: fixed; inset: 0;
        background: #fff;
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        z-index: 10;
    }
    .mobile-menu.open {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    .mobile-menu .menu-inner {padding: 60px 20px;}
    .mobile-menu ul {
        list-style: none;
        margin: 0;
        padding: 0;
    }
    .mobile-menu li {border-bottom: 1px solid #ededed;}
    .mobile-menu a {
        display: block;
        padding: 20px 4px;

        color: var(--main-black);
        font-size: 1rem;
        text-decoration: none;
    }
    footer {
        width: auto;
        max-width: 100%;
        margin: 0 auto;
        border-radius: 0px;
    }
    footer .inner {padding: 40px 20px;}
    footer .inner .terms-box {margin: 30px 0px 12px;}
    footer .inner .terms-box li a {display: block; margin-bottom: 16px;}
    footer .inner .terms-box li:last-child a {margin-bottom: 0px;}
    footer .inner .container {
        flex-direction: column;
        align-items: flex-start;
        gap: 28px;
        margin-bottom: 28px;
    }
    footer .inner .info-box span {
        margin: 0px 22px 8px 0px;
        line-height: 1.5;
    }
    .back-to-top {right: 2%;}
}