/*
 * 술술 UI foundation
 * 기존 PHP 동작과 선택자를 유지하면서 브랜드와 핵심 학습 화면을 점진적으로 전환한다.
 */

:root {
    --ss-primary: #167a63;
    --ss-primary-deep: #0e5b49;
    --ss-primary-soft: #e8f5f0;
    --ss-accent: #ffb84d;
    --ss-accent-soft: #fff2d7;
    --ss-ink: #16201d;
    --ss-text: #34423d;
    --ss-muted: #66736e;
    --ss-line: #d9e1dd;
    --ss-paper: #fffdf7;
    --ss-canvas: #f7f5ee;
    --ss-sky: #edf5ff;
    --ss-danger: #c8424d;
    --ss-radius-sm: 10px;
    --ss-radius-md: 16px;
    --ss-radius-lg: 24px;
    --ss-shadow-sm: 0 8px 22px rgba(30, 57, 48, 0.08);
    --ss-shadow-md: 0 18px 48px rgba(30, 57, 48, 0.12);

    /* 기존 컴포넌트가 새 브랜드 색을 자연스럽게 상속하도록 연결한다. */
    --ss-color-primary: var(--ss-primary);
    --ss-color-primary-strong: var(--ss-primary-deep);
    --ss-color-primary-soft: var(--ss-primary-soft);
    --ss-color-primary-active: #26967b;
    --ss-color-accent: var(--ss-accent);
    --ss-color-text: var(--ss-text);
    --ss-color-text-strong: var(--ss-ink);
    --ss-color-text-muted: var(--ss-muted);
}

html {
    scroll-behavior: smooth;
}

body {
    color: var(--ss-text);
    background: #fff;
    font-family: Pretendard, -apple-system, BlinkMacSystemFont, system-ui, "Segoe UI", "Apple SD Gothic Neo", "Noto Sans KR", "Malgun Gothic", sans-serif;
}

::selection {
    color: var(--ss-ink);
    background: rgba(255, 184, 77, 0.45);
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible,
[tabindex]:focus-visible {
    outline: 3px solid var(--ss-accent) !important;
    outline-offset: 3px;
}

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

/* 공통 헤더와 브랜드 워드마크 */
.sulsul-wordmark {
    display: inline-flex;
    align-items: center;
    gap: 0.8rem;
    min-height: 48px;
    color: var(--ss-primary-deep);
    font-size: 3.4rem;
    font-weight: 900;
    line-height: 1;
    white-space: nowrap;
}

.sulsul-logo-mark {
    display: block;
    flex: 0 0 auto;
    width: 4.8rem;
    height: 4.8rem;
    object-fit: contain;
}

.sulsul-wordmark-text {
    display: block;
    letter-spacing: -0.08em;
}

.header-topbar {
    color: var(--ss-muted);
    background: var(--ss-paper);
    border-bottom: 1px solid rgba(22, 32, 29, 0.06);
}

.header-contents,
.header-sticky {
    background: rgba(255, 255, 255, 0.97);
    border-bottom: 1px solid var(--ss-line);
    box-shadow: 0 8px 28px rgba(22, 32, 29, 0.05);
}

.header-contents .wrapper,
.header-sticky .wrapper {
    min-height: 76px;
}

.header-contents .gnb,
.header-sticky .gnb {
    gap: 3.2rem;
}

.header-contents .gnb > li > a,
.header-sticky .gnb > li > a {
    position: relative;
    color: var(--ss-ink);
    font-weight: 650;
}

.header-contents .gnb > li > a::after,
.header-sticky .gnb > li > a::after {
    position: absolute;
    right: 0;
    bottom: -12px;
    left: 0;
    height: 3px;
    border-radius: 999px;
    background: var(--ss-primary);
    content: "";
    opacity: 0;
    transform: scaleX(0.4);
    transition: opacity 160ms ease, transform 160ms ease;
}

.header-contents .gnb > li > a:hover::after,
.header-sticky .gnb > li > a:hover::after {
    opacity: 1;
    transform: scaleX(1);
}

.header-search {
    background: var(--ss-primary-soft);
    border-bottom: 1px solid rgba(22, 122, 99, 0.12);
}

.header-search-input input {
    border-color: rgba(22, 122, 99, 0.35);
    background: #fff;
}

.topbar-logout button,
.topbar-logout a,
.topbar-menu a {
    min-height: 40px;
    display: inline-flex;
    align-items: center;
}

footer {
    color: var(--ss-muted);
    background: var(--ss-paper);
    border-top: 1px solid var(--ss-line);
}

.footer1,
.footer2 {
    background: transparent !important;
}

.footer1 .cs_contact span[style] {
    color: var(--ss-primary) !important;
}

/* 콘텐츠 목록: Tonggle의 명확한 탐색 구조를 술술 브랜드로 재구성 */
body.sulsul-content-list-page {
    background: var(--ss-canvas);
}

.sulsul-content-list-page .header-search,
.sulsul-reader-page .header-search {
    display: none;
}

.sulsul-content-list-page .sub-contents_area {
    margin: 0;
    padding: 0 0 9.6rem;
    background:
        radial-gradient(circle at 12% 5%, rgba(255, 184, 77, 0.14), transparent 26rem),
        radial-gradient(circle at 88% 14%, rgba(22, 122, 99, 0.11), transparent 30rem),
        var(--ss-canvas);
}

.sulsul-content-list-page .sub-contents_area > .wrapper {
    max-width: 1280px;
    padding: 0 24px;
}

.sulsul-content-hero {
    max-width: 840px;
    margin: 0 auto;
    padding: 8.8rem 0 5.6rem;
    text-align: center;
}

.sulsul-eyebrow,
.sulsul-book-kicker {
    display: inline-flex;
    align-items: center;
    min-height: 32px;
    padding: 6px 13px;
    border-radius: 999px;
    color: var(--ss-primary-deep);
    background: var(--ss-primary-soft);
    font-size: 1.3rem;
    font-weight: 800;
    letter-spacing: 0.04em;
}

.sulsul-content-hero .sub-title {
    margin: 1.8rem 0 1.2rem;
    padding: 0;
    border: 0;
    color: var(--ss-ink);
    font-size: clamp(3.4rem, 5vw, 5.4rem);
    font-weight: 850;
    line-height: 1.18;
    letter-spacing: -0.045em;
}

.sulsul-content-hero .seo-page-intro {
    max-width: 650px;
    margin: 0 auto;
    color: var(--ss-muted);
    font-size: 1.8rem;
    line-height: 1.7;
}

.sulsul-content-search {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 10px;
    max-width: 720px;
    margin: 3.2rem auto 0;
    padding: 8px;
    border: 1px solid rgba(22, 122, 99, 0.32);
    border-radius: 20px;
    background: rgba(255, 255, 255, 0.96);
    box-shadow: var(--ss-shadow-sm);
}

.sulsul-content-search input[type="search"] {
    width: 100%;
    min-width: 0;
    min-height: 52px;
    padding: 0 18px;
    border: 0;
    border-radius: 14px;
    color: var(--ss-ink);
    background: transparent;
    font-size: 1.6rem;
}

.sulsul-content-search button {
    min-width: 104px;
    min-height: 52px;
    padding: 0 22px;
    border-radius: 14px;
    color: #fff;
    background: var(--ss-primary);
    font-size: 1.6rem;
    font-weight: 750;
    transition: background 160ms ease, transform 160ms ease;
}

.sulsul-content-search button:hover {
    background: var(--ss-primary-deep);
    transform: translateY(-1px);
}

.sulsul-content-list-page .articles_container {
    display: block;
}

.sulsul-content-list-page .articles_container .category {
    width: 100%;
    min-width: 0;
    margin-bottom: 2.4rem;
}

.sulsul-content-list-page .articles_container .category ul {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    max-width: none;
    padding: 0;
    border: 0;
}

.sulsul-content-list-page .articles_container .category ul li {
    margin: 0;
    padding: 0;
    color: var(--ss-muted);
    font-size: 1.4rem;
}

.sulsul-content-list-page .articles_container .category ul li a {
    display: inline-flex;
    align-items: center;
    min-height: 42px;
    padding: 0 16px;
    border: 1px solid var(--ss-line);
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.82);
    transition: border-color 160ms ease, color 160ms ease, background 160ms ease;
}

.sulsul-content-list-page .articles_container .category ul li a:hover,
.sulsul-content-list-page .articles_container .category ul li.active a {
    color: #fff;
    border-color: var(--ss-primary);
    background: var(--ss-primary);
}

.sulsul-content-list-page .articles {
    min-width: 0;
}

.sulsul-content-list-page .articles-header {
    min-height: 72px;
    padding: 10px 0;
    border-top: 1px solid var(--ss-line);
    border-bottom: 1px solid var(--ss-line);
}

.sulsul-content-list-page .tab_btn1 ul {
    gap: 8px;
}

.sulsul-content-list-page .tab_btn1 li a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 92px;
    min-height: 44px;
    border: 1px solid var(--ss-line);
    border-radius: 999px;
    color: var(--ss-muted);
    background: #fff;
    font-weight: 700;
}

.sulsul-content-list-page .tab_btn1 li a.active {
    color: #fff;
    border-color: var(--ss-primary);
    background: var(--ss-primary);
}

.sulsul-content-list-page .articles-list {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 28px;
    margin: 3.2rem 0 0;
}

.sulsul-content-list-page .articles-list .articles-list-item {
    width: auto;
    margin: 0;
    padding: 0;
    display: block;
}

.sulsul-content-list-page .articles-list-item::before {
    display: none;
}

.sulsul-content-list-page .articles-list-item > a {
    position: relative;
    display: flex;
    flex-direction: column;
    height: 100%;
    min-height: 430px;
    overflow: hidden;
    border: 1px solid rgba(22, 122, 99, 0.16);
    border-radius: var(--ss-radius-lg);
    color: var(--ss-text);
    background: var(--ss-paper);
    box-shadow: var(--ss-shadow-sm);
    transform: translateY(0);
    transition: border-color 180ms ease, box-shadow 180ms ease, transform 180ms ease;
}

.sulsul-content-list-page .articles-list-item > a::before {
    position: absolute;
    z-index: 3;
    top: 0;
    bottom: 0;
    left: 0;
    width: 7px;
    background: linear-gradient(180deg, var(--ss-primary), var(--ss-accent));
    content: "";
}

.sulsul-content-list-page .articles-list-item > a:hover {
    border-color: rgba(22, 122, 99, 0.42);
    box-shadow: var(--ss-shadow-md);
    transform: translateY(-6px);
}

.sulsul-content-list-page .articles-list-item-thumbsarea {
    width: 100%;
    height: auto;
    padding-top: 58%;
    overflow: hidden;
    border: 0;
    border-radius: 0;
    background: var(--ss-primary-soft);
    box-shadow: none;
}

.sulsul-content-list-page .articles-list-item-thumbsarea .thumbs {
    width: 100%;
    height: 100%;
    border-radius: 0;
    transition: transform 260ms ease;
}

.sulsul-content-list-page .articles-list-item > a:hover .thumbs {
    transform: translate(-50%, -50%) scale(1.045);
}

.sulsul-content-list-page .articles-list-item-thumbsarea .lv {
    top: 14px;
    left: 14px;
    margin: 0;
    padding: 7px 12px;
    border: 0;
    border-radius: 999px;
    color: #fff;
    background: var(--ss-primary-deep);
    box-shadow: 0 4px 12px rgba(14, 91, 73, 0.25);
    font-size: 1.2rem;
}

.sulsul-content-list-page .articles-list-item-thumbsarea + div {
    flex: 1;
    display: flex;
    flex-direction: column;
    margin: 0;
    padding: 20px 22px 22px 26px;
}

.sulsul-content-list-page .articles-list-item-info {
    margin: 0;
}

.sulsul-content-list-page .articles-list-item .category_title {
    display: inline-flex;
    align-items: center;
    min-height: 28px;
    padding: 4px 10px;
    border: 0;
    border-radius: 999px;
    color: var(--ss-primary-deep);
    background: var(--ss-primary-soft);
    font-size: 1.2rem;
    font-weight: 750;
}

.sulsul-content-list-page .articles-list-item-info button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: #fff;
}

.sulsul-content-list-page .articles-list-item-title {
    display: -webkit-box;
    margin: 1.2rem 0 0;
    overflow: hidden;
    color: var(--ss-ink);
    font-size: 2rem;
    font-weight: 800;
    line-height: 1.45;
    letter-spacing: -0.025em;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
}

.sulsul-card-summary {
    display: -webkit-box;
    margin: 1rem 0 0;
    overflow: hidden;
    color: var(--ss-muted);
    font-size: 1.4rem;
    line-height: 1.65;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
}

.sulsul-card-cta {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    margin-top: auto;
    padding-top: 2rem;
    color: var(--ss-primary-deep);
    font-size: 1.45rem;
    font-weight: 800;
}

/* 책형 콘텐츠 보기 */
body.sulsul-reader-page {
    background: var(--ss-canvas);
}

.sulsul-reader-page .sub-contents_area {
    margin: 0;
    background: var(--ss-canvas);
}

.sulsul-reader-page .article_view {
    margin: 0;
    padding: 3.2rem 0 8rem;
    background:
        radial-gradient(circle at 8% 8%, rgba(255, 184, 77, 0.12), transparent 28rem),
        radial-gradient(circle at 94% 20%, rgba(22, 122, 99, 0.11), transparent 30rem),
        var(--ss-canvas);
}

.sulsul-reader-page .article_view > .wrapper-s {
    width: calc(100% - 48px);
    max-width: 1360px !important;
}

.sulsul-reader-page .article_view-header {
    min-height: 72px;
    height: auto;
    margin-bottom: 1.6rem;
    padding: 10px 16px;
    border: 1px solid var(--ss-line);
    border-radius: var(--ss-radius-md);
    background: rgba(255, 255, 255, 0.9);
    box-shadow: var(--ss-shadow-sm);
}

.sulsul-reader-page .article_view-header .bookmark {
    border-color: var(--ss-primary);
    background: var(--ss-primary-soft);
}

.sulsul-reader-page .article_view-header .btn_list,
.sulsul-reader-page .article_view-header .zoom button {
    min-width: 44px;
    min-height: 44px;
    border-color: var(--ss-line);
    border-radius: 12px;
    background: #fff;
}

.sulsul-reader-page .learning-mission-card {
    max-width: 1360px;
    margin: 0 auto 2rem;
    border-color: rgba(22, 122, 99, 0.22);
    border-radius: var(--ss-radius-lg);
    background: rgba(255, 255, 255, 0.92);
    box-shadow: var(--ss-shadow-sm);
}

.sulsul-reader-page .learning-mission-step.done {
    border-color: var(--ss-primary);
    background: var(--ss-primary-soft);
}

.sulsul-reader-page .learning-mission-step.current {
    border-color: var(--ss-accent);
    background: var(--ss-accent-soft);
    box-shadow: 0 0 0 3px rgba(255, 184, 77, 0.18);
}

.sulsul-reader-page .article_view-body.sulsul-book-reader {
    max-width: none;
    padding: 0;
    overflow: visible;
    border-radius: 28px;
    color: var(--ss-text);
    background: transparent;
    box-shadow: none;
    font-size: 1.7rem;
    line-height: 1.85;
}

.sulsul-reader-page .article_view-body.sulsul-book-reader::after {
    display: none;
}

.sulsul-book-pages {
    position: relative;
    display: grid;
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
    align-items: stretch;
    min-height: 720px;
    margin-bottom: 3.2rem;
    overflow: clip;
    border: 1px solid #d9d2bf;
    border-radius: 28px 22px 22px 28px;
    background:
        linear-gradient(90deg, rgba(210, 198, 169, 0.18), transparent 5%, transparent 95%, rgba(210, 198, 169, 0.16)),
        var(--ss-paper);
    box-shadow:
        0 24px 58px rgba(65, 58, 42, 0.16),
        0 4px 0 #d7cfba,
        0 8px 0 #eee8d8;
}

.sulsul-book-pages::before {
    position: absolute;
    z-index: 2;
    top: 0;
    bottom: 0;
    left: 45%;
    width: 28px;
    content: "";
    pointer-events: none;
    transform: translateX(-50%);
    background: linear-gradient(90deg, rgba(77, 66, 45, 0.1), rgba(255, 255, 255, 0.7) 42%, rgba(77, 66, 45, 0.08));
    filter: blur(1px);
}

.sulsul-book-cover,
.sulsul-book-page {
    position: relative;
    min-width: 0;
    padding: clamp(3.2rem, 5vw, 6.4rem);
}

.sulsul-book-cover {
    align-self: start;
    min-height: 720px;
    padding-right: clamp(3.6rem, 5vw, 7rem);
    background:
        radial-gradient(circle at 18% 16%, rgba(255, 184, 77, 0.16), transparent 19rem),
        linear-gradient(145deg, rgba(232, 245, 240, 0.54), transparent 55%);
}

.sulsul-book-cover::after {
    position: absolute;
    right: 28px;
    bottom: 24px;
    color: rgba(22, 91, 73, 0.48);
    content: "술술 · 읽기";
    font-size: 1.2rem;
    font-weight: 700;
    letter-spacing: 0.08em;
}

.sulsul-book-cover h1 {
    margin: 2.2rem 0 1.4rem !important;
    color: var(--ss-ink);
    font-family: Pretendard, -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
    font-size: clamp(3rem, 4vw, 4.8rem);
    font-weight: 850;
    line-height: 1.24;
    letter-spacing: -0.045em;
    word-break: keep-all;
}

.sulsul-book-cover h2 {
    margin: 0 0 2rem !important;
    color: var(--ss-ink);
    font-size: clamp(2.4rem, 3vw, 3.6rem);
    font-weight: 800;
    line-height: 1.34;
}

.sulsul-book-cover h3 {
    margin: 1.6rem 0 0;
    color: var(--ss-primary-deep);
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: 0.03em;
}

.sulsul-book-cover h5 {
    margin: 2rem 0 0;
    color: var(--ss-muted);
    font-size: 1.6rem;
    font-weight: 500;
    line-height: 1.75;
}

.sulsul-book-cover > img {
    display: block;
    width: 100%;
    max-height: 360px;
    margin: 3.2rem 0 0 !important;
    object-fit: cover;
    border: 1px solid rgba(22, 122, 99, 0.18);
    border-radius: 18px;
    box-shadow: 0 14px 30px rgba(30, 57, 48, 0.14);
}

.sulsul-book-page {
    padding-left: clamp(4rem, 6vw, 8rem);
    overflow: hidden;
    background: linear-gradient(90deg, rgba(205, 194, 167, 0.11), transparent 8%);
}

.sulsul-page-viewport {
    position: relative;
    width: 100%;
    max-width: 100%;
    overflow: visible;
    outline: none;
}

.sulsul-page-viewport.is-paginated {
    height: var(--sulsul-page-height, 680px);
    overflow: hidden;
    scroll-behavior: smooth;
    scroll-snap-type: x mandatory;
}

.sulsul-page-viewport.is-paginated .content-WYSIWYG-wrap {
    width: 100%;
    max-width: none;
    padding: 0 0 1.5rem;
    column-fill: auto;
    column-gap: var(--sulsul-column-gap, 48px);
    column-rule: 1px solid rgba(126, 111, 78, 0.14);
}

.sulsul-page-viewport.is-paginated .content-WYSIWYG-wrap > * {
    break-inside: avoid;
}

.sulsul-page-viewport.is-turning::after {
    position: absolute;
    inset: 0;
    content: "";
    pointer-events: none;
    background: linear-gradient(90deg, transparent, rgba(128, 110, 74, 0.08), transparent);
    animation: sulsul-page-sheen 360ms ease both;
}

@keyframes sulsul-page-sheen {
    0% { opacity: 0; transform: translateX(25%); }
    50% { opacity: 1; }
    100% { opacity: 0; transform: translateX(-25%); }
}

.sulsul-book-page::after {
    position: absolute;
    right: 28px;
    bottom: 24px;
    color: rgba(102, 115, 110, 0.62);
    content: "본문";
    font-size: 1.2rem;
    font-weight: 700;
    letter-spacing: 0.08em;
}

.sulsul-book-page .content-WYSIWYG-wrap {
    margin: 0;
    padding-bottom: 3.2rem;
    color: #2d3834;
    font-size: 1.7rem;
    line-height: 1.9;
}

.sulsul-book-page .content-WYSIWYG-wrap p,
.sulsul-book-page .content-WYSIWYG-wrap h4 + p,
.sulsul-book-page .content-WYSIWYG-wrap h5 + p {
    margin-bottom: 1.8rem;
    font-family: Pretendard, -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
    line-height: 1.9;
    letter-spacing: -0.012em;
    text-align: left;
    word-break: keep-all;
}

.sulsul-book-page .content-WYSIWYG-wrap p::first-letter {
    margin-left: 0;
}

.sulsul-book-page .content-WYSIWYG-wrap h3,
.sulsul-book-page .content-WYSIWYG-wrap h4,
.sulsul-book-page .content-WYSIWYG-wrap h5 {
    color: var(--ss-ink);
    font-family: Pretendard, -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
}

.sulsul-book-page .content-WYSIWYG-wrap h3 {
    color: var(--ss-primary-deep);
}

.sulsul-book-page .content-WYSIWYG-wrap blockquote {
    padding: 22px 24px;
    border: 0;
    border-left: 4px solid var(--ss-accent);
    border-radius: 0 14px 14px 0;
    background: var(--ss-accent-soft);
}

.sulsul-book-page .content-WYSIWYG-wrap img {
    max-height: 460px;
    object-fit: contain;
    border-radius: 14px;
}

.sulsul-reader-controls {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 2rem;
    width: fit-content;
    margin: -1.2rem auto 3.6rem;
    padding: 0.8rem;
    border: 1px solid rgba(22, 122, 99, 0.18);
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.94);
    box-shadow: var(--ss-shadow-sm);
}

.sulsul-reader-controls[hidden] {
    display: none;
}

.sulsul-page-button {
    min-width: 8.8rem;
    min-height: 4.4rem;
    padding: 0 1.8rem;
    border: 0;
    border-radius: 999px;
    color: #fff;
    background: var(--ss-primary);
    font-size: 1.4rem;
    font-weight: 800;
    cursor: pointer;
    transition: transform 160ms ease, background-color 160ms ease, opacity 160ms ease;
}

.sulsul-page-button:hover:not(:disabled) {
    transform: translateY(-1px);
    background: var(--ss-primary-deep);
}

.sulsul-page-button:disabled {
    opacity: 0.34;
    cursor: not-allowed;
}

.sulsul-page-status {
    min-width: 6rem;
    color: var(--ss-muted);
    font-size: 1.4rem;
    font-variant-numeric: tabular-nums;
    font-weight: 800;
    text-align: center;
}

.sulsul-book-reader > h5,
.sulsul-book-reader > .board-view-content,
.sulsul-book-reader > div[style*="저작권자"],
.sulsul-book-reader > .row {
    max-width: 920px;
    margin-right: auto !important;
    margin-left: auto !important;
}

.sulsul-reader-page .relation_article {
    padding: 6.4rem 0;
    background: #fff;
}

.sulsul-reader-page .relation_article .wrapper-s {
    max-width: 1280px !important;
}

@media (max-width: 1024px) {
    .sulsul-content-list-page .articles-list {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 20px;
    }

    .sulsul-content-list-page .articles-list .articles-list-item,
    .sulsul-content-list-page .articles-list-item > a {
        width: auto;
    }

    .sulsul-content-list-page .articles-list-item > a {
        display: flex;
        flex-direction: column;
    }

    .sulsul-content-list-page .articles-list-item-thumbsarea {
        width: 100%;
        padding-top: 58%;
    }

    .sulsul-content-list-page .articles-list-item-thumbsarea + div {
        margin: 0;
    }

    .sulsul-content-list-page .articles_container .category {
        display: block;
    }

    .sulsul-book-pages {
        grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.08fr);
    }
}

@media (max-width: 767px) {
    body.sulsul-home-page .header-mobile {
        height: 5.6rem;
        background: rgba(255, 255, 255, 0.98);
        border-bottom: 1px solid rgba(22, 91, 73, 0.08);
        box-shadow: 0 4px 12px rgba(22, 32, 29, 0.1);
    }

    body.sulsul-home-page .header-mobile .wrapper {
        gap: 0;
        padding: 0 1.6rem;
    }

    body.sulsul-home-page #mobile-menu-label > img {
        width: 2rem;
        height: auto;
    }

    body.sulsul-home-page .header-mobile .wrapper > a[href*="index.php"] {
        margin-left: 1.6rem;
    }

    body.sulsul-home-page .header-mobile .sulsul-wordmark {
        gap: 0.3rem;
        min-height: 3.8rem;
        font-size: 2.4rem;
    }

    body.sulsul-home-page .header-mobile .sulsul-logo-mark {
        width: 3.5rem;
        height: 3.5rem;
    }

    body.sulsul-home-page .header-mobile .header-util {
        display: flex;
        align-items: center;
        justify-content: flex-end;
        gap: 1rem;
    }

    body.sulsul-home-page .header-mobile .header-util > label > img {
        width: 2.2rem;
        height: auto;
    }

    body.sulsul-home-page .header-mobile .btn_7 {
        min-width: 5.8rem;
        min-height: 3rem;
        padding: 0.3rem 1rem !important;
        color: var(--ss-primary) !important;
        border: 1px solid var(--ss-primary) !important;
        border-radius: 999px !important;
        background: #fff !important;
        font-size: 1.4rem;
        font-weight: 800;
    }

    body.sulsul-home-page .gnb-mobile {
        z-index: 100;
        min-height: 6.4rem;
        padding-bottom: 0;
        border-top: 1px solid rgba(22, 91, 73, 0.08);
        box-shadow: 0 -2px 8px rgba(22, 32, 29, 0.06);
    }

    body.sulsul-home-page .gnb-mobile a {
        height: 6.4rem;
        color: #83918c;
        font-size: 1.1rem;
        font-weight: 700;
    }

    body.sulsul-home-page .gnb-mobile a > img {
        width: 2.4rem;
        height: 2.4rem;
        object-fit: contain;
    }

    body.sulsul-home-page .gnb-mobile a > p {
        margin-top: 0.35rem;
        color: inherit;
    }

    body.sulsul-home-page .gnb-mobile a.active,
    body.sulsul-home-page .gnb-mobile a.active > p {
        color: var(--ss-primary);
    }

    .sulsul-wordmark {
        gap: 0.5rem;
        min-height: 40px;
        font-size: 2.7rem;
    }

    .sulsul-logo-mark {
        width: 3.8rem;
        height: 3.8rem;
    }

    .sulsul-content-list-page .sub-contents_area > .wrapper,
    .sulsul-reader-page .article_view > .wrapper-s {
        width: 100%;
        padding-right: 16px;
        padding-left: 16px;
    }

    .sulsul-content-hero {
        padding: 5.6rem 0 3.6rem;
        text-align: left;
    }

    .sulsul-content-hero .sub-title {
        margin-top: 1.4rem;
        font-size: 3.4rem;
    }

    .sulsul-content-hero .seo-page-intro {
        font-size: 1.6rem;
    }

    .sulsul-content-search {
        grid-template-columns: minmax(0, 1fr) 78px;
        margin-top: 2.4rem;
    }

    .sulsul-content-search button {
        min-width: 78px;
        padding: 0 12px;
    }

    .sulsul-content-list-page .articles_container .category ul {
        flex-wrap: nowrap;
        margin-right: -16px;
        padding-right: 16px;
        overflow-x: auto;
        scrollbar-width: none;
    }

    .sulsul-content-list-page .articles_container .category ul::-webkit-scrollbar {
        display: none;
    }

    .sulsul-content-list-page .articles_container .category ul li {
        flex: 0 0 auto;
    }

    .sulsul-content-list-page .articles-list {
        grid-template-columns: 1fr;
        gap: 16px;
        padding: 0 !important;
    }

    .sulsul-content-list-page .articles-list .articles-list-item {
        padding: 0;
        border: 0;
    }

    .sulsul-content-list-page .articles-list-item > a {
        min-height: 0;
        border-radius: 20px;
    }

    .sulsul-content-list-page .articles-list-item-thumbsarea {
        height: auto;
        padding-top: 54%;
    }

    .sulsul-content-list-page .articles-list-item-thumbsarea + div {
        padding: 18px 18px 20px 22px;
    }

    .sulsul-card-cta {
        padding-top: 1.6rem;
    }

    .sulsul-reader-page .article_view {
        padding: 1.6rem 0 5.6rem;
    }

    .sulsul-reader-page .article_view-header {
        gap: 10px;
        padding: 12px;
    }

    .sulsul-reader-page .article_view-header > div {
        flex-wrap: wrap;
        gap: 8px;
    }

    .sulsul-reader-page .article_view-header .btn_list {
        margin: 0 !important;
        padding: 0 12px !important;
    }

    .sulsul-reader-page .learning-mission-card {
        border-radius: 18px;
    }

    .sulsul-book-pages {
        display: block;
        min-height: 0;
        overflow: visible;
        border-radius: 20px;
        box-shadow: 0 16px 36px rgba(65, 58, 42, 0.14), 0 3px 0 #ddd4bd;
    }

    .sulsul-book-pages::before {
        top: auto;
        right: 0;
        bottom: auto;
        left: 0;
        width: auto;
        height: 18px;
        transform: none;
        background: linear-gradient(180deg, rgba(77, 66, 45, 0.08), rgba(255, 255, 255, 0.82), rgba(77, 66, 45, 0.06));
    }

    .sulsul-book-cover,
    .sulsul-book-page {
        min-height: 0;
        padding: 3.2rem 2.4rem 4.8rem;
    }

    .sulsul-book-cover {
        padding-right: 2.4rem;
        border-bottom: 1px solid #ddd4bd;
    }

    .sulsul-book-page {
        padding-top: 4.8rem;
        padding-left: 2.4rem;
        background: linear-gradient(180deg, rgba(205, 194, 167, 0.12), transparent 5%);
    }

    .sulsul-book-cover h1 {
        font-size: 3.2rem;
    }

    .sulsul-book-cover h2 {
        font-size: 2.5rem;
    }

    .sulsul-book-page .content-WYSIWYG-wrap,
    .sulsul-book-page .content-WYSIWYG-wrap p {
        padding: 0 !important;
        font-size: 1.7rem;
        line-height: 1.88;
    }
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        scroll-behavior: auto !important;
        transition-duration: 0.01ms !important;
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
    }
}