:root {
    --primary-color: #4a90e2;
    --secondary-color: #50e3c2;
    --accent-color: #f5a623;
    --bg-color: #f9f9f9;
    --bg-secondary-color: #ffffff;
    --bg-tertiary-color: #f1f8ff;
    --text-color: #333333;
    --text-secondary-color: #666666;
    --border-color: #e0e0e0;
    --text-color-light: #ffffff;
    --link-color: var(--primary-color);
    --link-hover-color: #357abd;

    --font-family-base: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
    --border-radius: 6px;
    --box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    --transition-base: all 0.25s ease-in-out;
}

*,
*::before,
*::after {
    box-sizing: border-box;
}

/* ==========================================================================
   Base & Global Styles
   ========================================================================== */

body {
    font-family: var(--font-family-base);
    margin: 0;
    padding: 0;
    overflow-x: hidden;
    /* 防止 100vw 导致的 가로 스크롤 방지 */
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.7;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    transition: background-color 0.3s ease, color 0.3s ease;
}

h2 {
    font-size: 1.2rem;
}

a {
    color: var(--link-color);
    text-decoration: none;
    transition: var(--transition-base);
}

a:hover {
    color: var(--link-hover-color);
    text-decoration: none;
}

button {
    cursor: pointer;
    transition: var(--transition-base);
    border-radius: var(--border-radius);
    padding: 0.6rem 1.2rem;
    font-size: 0.9rem;
    font-weight: 500;
    border: 1px solid transparent;
    line-height: 1.5;
}

button.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    vertical-align: middle;
    user-select: none;
}

button.btn-primary {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    color: var(--text-color-light);
    box-shadow: 0 2px 4px rgba(74, 144, 226, 0.2);
}

button.btn-primary:hover {
    background-color: var(--link-hover-color);
    border-color: var(--link-hover-color);
    transform: translateY(-2px);
    box-shadow: 0 5px 10px rgba(74, 144, 226, 0.3);
}

button.btn-outline-primary {
    background-color: transparent;
    border-color: var(--primary-color);
    color: var(--primary-color);
}

button.btn-outline-primary:hover {
    background-color: var(--primary-color);
    color: var(--text-color-light);
}

button.btn-link {
    background-color: transparent;
    border-color: transparent;
    color: var(--link-color);
    padding: 0;
    text-decoration: underline;
}

button.btn-link:hover {
    color: var(--link-hover-color);
    text-decoration: none;
}

table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    margin-top: 2rem;
    margin-bottom: 2rem;
    background-color: var(--bg-secondary-color);
    box-shadow: var(--box-shadow);
    border-radius: var(--border-radius);
    overflow: hidden;
    border: 1px solid var(--border-color);
}

th,
td {
    border: none;
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 1.2rem;
    text-align: left;
    vertical-align: middle;
    font-size: 0.9rem;
    color: var(--text-color);
}

th {
    background-color: #f8f9fa;
    font-weight: 600;
    color: var(--text-secondary-color);
    border-bottom-width: 1px;
}

tbody tr:last-child td {
    border-bottom: none;
}

tbody tr {
    transition: background-color 0.15s ease-in-out;
}

tbody tr:hover {
    background-color: var(--bg-tertiary-color);
}

td button {
    padding: 0.4rem 0.8rem;
    font-size: 0.8rem;
    margin-right: 0.3rem;
}

td button:last-child {
    margin-right: 0;
}

/* ==========================================================================
   Header Styles
   ========================================================================== */

/* ==========================================================================
   Header Styles
   ========================================================================== */

.site-header {
    background-color: rgba(255, 255, 255, 0.85);
    /* Translucent light */
    backdrop-filter: blur(12px);
    /* Glassmorphism */
    -webkit-backdrop-filter: blur(12px);
    color: var(--text-color);
    box-shadow: 0 1px 0 rgba(0, 0, 0, 0.05);
    /* Subtle separator */
    position: sticky !important;
    top: 0 !important;
    z-index: 1000;
    transition: background-color 0.3s ease, color 0.3s ease, box-shadow 0.3s ease, transform 0.3s ease-in-out;
    transform: none !important;
    /* 항상 고정 보장 (JS버그 방어) */
}

/* --- Top Bar --- */
.top-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 1.5rem;
    /* More breathing room */
    min-height: 60px;
    /* Fixed height for consistency */
    flex-wrap: wrap;
}

.site-logo-h1 {
    margin: 0;
    padding: 0;
    font-size: 1.5rem;
    line-height: 1;
}

/* ==========================================================================
   Responsive Hybrid Ad Banner Styles (1200x280 + Flexible Fillers)
   ========================================================================== */
.ad-banner-container {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 15px;
    width: 100%;
    margin: 10px auto;
    z-index: 10;
    flex-wrap: nowrap;
    overflow: hidden;
}

/* 모든 광고 슬롯 공통 */
.ad-slot {
    border-radius: 8px;
    /* 모서리 둥글게 */
    display: block;
    /* 애드센스가 크기를 계산할 수 있도록 block 유지 */
    overflow: hidden;
    /* 영역 밖으로 나가는 광고 숨김 */
    background-color: var(--bg-secondary-color);
    /* 빈 공간일때 배경색 */
    box-shadow: inset 0 0 10px rgba(0, 0, 0, 0.05);
    /* 약간의 음영 */
}

/* A타입: 1200x280 고정형 프리미엄 슬롯 */
.ad-slot-large {
    width: 1200px;
    min-width: 1200px;
    height: 280px;
    flex-shrink: 0;
}

/* B타입: 남는 공간을 채우는 가변형 슬롯 */
.ad-slot-flexible {
    flex: 1 1 auto;
    min-width: 250px;
    width: 100%;
    /* Add explicit full width for flex container */
    max-width: 100%;
    /* Prevent overflow */
    height: 280px;
    flex-shrink: 1;
    display: block;
    /* Force block context for AdSense */
    overflow: hidden;
}

/* --- 해상도별 광고 가시성 제어 (Media Queries) --- */

/* 
 * 1. 3600px 이상 (초광각 모니터)
 * l1, l2, l3 대형 배너 3개 + f1 가변 배너 1개 모두 노출
 * (이 구간은 아래 미디어 쿼리에 걸리지 않으므로 전부 노출됨)
 */

/* 
 * 2. 2400px ~ 3599px
 * l1, l2 대형 배너 2개 + f1 가변 배너 1개 노출 (l3 숨김)
 */
@media screen and (max-width: 3599px) {
    .hide-below-3600 {
        display: none !important;
    }
}

/* 
 * 3. 1200px ~ 2399px
 * l1 대형 배너 1개 + f1 가변 배너 1개 노출 (l2, l3 숨김)
 */
@media screen and (max-width: 2399px) {
    .hide-below-2400 {
        display: none !important;
    }
}

/* 
 * 4. 1199px 이하 (모바일/태블릿)
 * l1 대형 배너 노출하되 화면 너비에 맞게 반응형 축소 (f1, l2, l3 전부 숨김)
 * 사용자의 요구사항: "1200 이하는 디스플레이 반응형 나오면 되겠지?" 
 * -> l1(디스플레이 반응형)을 노출하고 f1(멀티플렉스)을 숨김
 */
@media screen and (max-width: 1199px) {

    /* 기존: l1을 숨겼으나, 이제 l1을 살리고 반응형으로 크기 조정 */
    .ad-slot-large.hide-below-desktop {
        width: 100%;
        min-width: 0;
        height: auto;
        min-height: 120px;
    }

    /* f1 가변 배너 숨김 */
    .flex-filler-1 {
        display: none !important;
    }
}

@media screen and (max-width: 767px) {
    .ad-banner-container {
        padding: 0 5px;
    }

    .ad-slot-large.hide-below-desktop {
        min-height: 90px;
    }
}

.site-logo {
    display: inline-block;
    font-weight: 800;
    /* Extra bold */
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    /* Gradient text */
    text-decoration: none !important;
    margin-right: 2rem;
    letter-spacing: -0.5px;
    flex-shrink: 0;
    transition: opacity 0.3s ease;
}

.site-logo:hover {
    opacity: 0.8;
    text-decoration: none !important;
}

.header-content {
    flex-grow: 1;
    margin: 0 1rem;
    min-width: 0;
    display: flex;
    justify-content: flex-start;
    /* Align slider to left if needed, or center */
    align-items: center;
    overflow: hidden;
}

/* Dark mode tweaks for header */
body.dark-mode .site-header {
    background-color: rgba(30, 30, 30, 0.85);
    /* Translucent dark */
    box-shadow: 0 1px 0 rgba(255, 255, 255, 0.05);
}

/* --- Fixed Category Menu (Header) --- */
/* --- Fixed Category Menu (Header) --- */
.fixed-category-container {
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
    margin-left: 0;
    margin-right: 1.5rem;
    padding: 0;
    overflow: visible;
    position: relative;
    z-index: 10;
}

.fixed-category-container .category-info-row {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex-wrap: wrap;
}

/* Current Category Link (below fixed categories) */
.current-category-link {
    display: inline;
    font-size: 0.9rem;
    font-weight: 500;
}

.current-category-link a {
    color: var(--text-color);
    text-decoration: none;
    transition: color 0.2s ease;
}

.current-category-link a:hover {
    color: var(--primary-color);
}

body.dark-mode .current-category-link a {
    color: var(--text-color);
}

body.dark-mode .current-category-link a:hover {
    color: var(--secondary-color);
}

/* Sibling Categories (same level categories) */
.sibling-categories {
    display: inline;
    font-size: 0.85rem;
    opacity: 0.8;
}

.sibling-categories a {
    color: var(--text-color);
    text-decoration: none;
    transition: color 0.2s ease;
}

.sibling-categories a:hover {
    color: var(--primary-color);
}

.sibling-separator {
    margin: 0 0.25rem;
    color: var(--text-color);
    opacity: 0.5;
}

body.dark-mode .sibling-categories a {
    color: var(--text-color);
}

body.dark-mode .sibling-categories a:hover {
    color: var(--secondary-color);
}

/* Child Categories (subcategories) */
.child-categories {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.3rem;
    font-size: 0.75rem;
    margin-top: 0.15rem;
    padding-left: 0.5rem;
}

.child-label {
    color: var(--text-color);
    opacity: 0.4;
    margin-right: 0.3rem;
    font-size: 0.7rem;
}

.child-categories a {
    color: var(--text-color);
    text-decoration: none;
    opacity: 0.65;
    transition: all 0.2s ease;
}

.child-categories a:hover {
    color: var(--primary-color);
    opacity: 1;
}

.child-separator {
    margin: 0 0.15rem;
    color: var(--text-color);
    opacity: 0.4;
}

body.dark-mode .child-categories a {
    color: var(--text-color);
}

body.dark-mode .child-categories a:hover {
    color: var(--secondary-color);
    opacity: 1;
}

.fixed-category-menu {
    display: flex;
    flex-wrap: nowrap;
    gap: 1.5rem;
    /* Spacious gap */
    list-style: none;
    padding: 0;
    margin: 0;
    align-items: center;
}

.fixed-category-menu li a {
    display: inline-block;
    text-decoration: none;
    color: var(--text-color);
    font-weight: 600;
    font-size: 1rem;
    padding: 0.5rem 0;
    /* Vertical padding only */
    border-radius: 0;
    background-color: transparent;
    border: none;
    position: relative;
    transition: color 0.3s ease;
    white-space: nowrap;
}

.fixed-category-menu li a::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: 0;
    left: 0;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    transition: width 0.3s ease;
}

.fixed-category-menu li a:hover {
    background-color: transparent;
    color: var(--text-color);
    /* Keep text color or slight highlight */
    transform: none;
    box-shadow: none;
}

.fixed-category-menu li a:hover::after {
    width: 100%;
}

/* Fix standard property lint */
.site-logo {
    display: inline-block;
    font-weight: 800;
    /* Extra bold */
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    background-clip: text;
    /* Standard property */
    -webkit-text-fill-color: transparent;
    /* Gradient text */
    text-decoration: none !important;
    margin-right: 2rem;
    letter-spacing: -0.5px;
    flex-shrink: 0;
    transition: opacity 0.3s ease;
}

/* 다크모드 지원 */
/* 다크모드 지원 */
body.dark-mode .fixed-category-menu li a {
    background-color: transparent;
    color: var(--text-color);
}

body.dark-mode .fixed-category-menu li a:hover {
    background-color: rgba(255, 255, 255, 0.1);
    color: var(--primary-color);
}

/* Active Category Highlight (Current Category) - Simple & Consistent */
.fixed-category-menu li a.active-category {
    color: var(--secondary-color);
    opacity: 0.7;
}

body.dark-mode .fixed-category-menu li a.active-category {
    color: var(--secondary-color);
    opacity: 0.7;
}

/* --- Category History Slider --- */
.category-history-slider-container {
    position: relative;
    display: flex;
    align-items: center;
    overflow: hidden;
    min-width: 0;
    width: 100%;
    padding: 0 25px;
    /* 버튼 공간 확보 */
}

.category-history-scroll-wrapper {
    flex-grow: 1;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    -ms-overflow-style: none;
    scroll-behavior: smooth;
}

.category-history-scroll-wrapper::-webkit-scrollbar {
    display: none;
}

.category-history-slider-container .history-links {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    white-space: nowrap;
    font-size: 0.8rem;
}

.category-history-slider-container .history-links li {
    display: flex;
    align-items: center;
    flex-shrink: 0;
}

.category-history-slider-container .history-links a {
    color: var(--text-secondary-color);
    text-decoration: none;
    padding: 0.2rem 0.4rem;
    border-radius: var(--border-radius);
    transition: background-color 0.2s ease, color 0.2s ease;
    display: inline-block;
}

.category-history-slider-container .history-links a:hover {
    background-color: var(--bg-tertiary-color);
    color: var(--primary-color);
}

.category-history-slider-container .history-separator {
    margin: 0 0.3rem;
    color: var(--text-secondary-color);
    font-size: 0.7rem;
    flex-shrink: 0;
}

.history-slider-button {
    display: none;
    /* 기본 숨김 */
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background-color: rgba(255, 255, 255, 0.7);
    border: 1px solid var(--border-color);
    border-radius: 50%;
    width: 24px;
    height: 24px;
    font-size: 0.8rem;
    font-weight: bold;
    color: var(--text-secondary-color);
    cursor: pointer;
    z-index: 10;
    transition: background-color 0.2s ease, box-shadow 0.2s ease;
    padding: 0;
    line-height: 22px;
    text-align: center;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
}

.history-slider-button.prev {
    left: 0;
}

.history-slider-button.next {
    right: 0;
}

.history-slider-button:hover {
    background-color: rgba(255, 255, 255, 0.9);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.15);
}

.history-slider-button.hidden {
    display: none;
}

/* --- User Info Area (Header) --- */
.user-info {
    display: flex;
    align-items: center;
    flex-shrink: 0;
    margin-left: auto;
    /* 우측 끝으로 밀기 */
    white-space: nowrap;
}

/* .user-info .user-details span (사용자 이름 등 - 현재 사용 안 함) */

/* Login/Logout SVG Icons (Header) */
#login-button,
#logout-button {
    margin-right: 0;
    color: var(--text-secondary-color);
    transition: transform 0.2s ease, color 0.2s ease;
}

#login-button:hover,
#logout-button:hover {
    color: var(--primary-color);
    transform: scale(1.1);
}

/* --- Tablet & Mobile Positioning for User Info --- */
@media (max-width: 992px) {
    .site-header {
        position: sticky;
        top: 0;
        z-index: 1000;
    }

    .top-bar {
        position: relative;
        padding-top: 15px;
        padding-right: 150px;
    }

    .user-info {
        position: absolute;
        top: 15px;
        right: 15px;
        margin-left: 0;
        gap: 10px !important;
    }

    .user-avatar-circle {
        width: 28px !important;
        height: 28px !important;
        font-size: 14px !important;
    }
}

/* Theme Toggle Button (Header - 제거됨) */
/* #theme-toggle-button 관련 스타일 제거 */


/* --- Main Navigation --- */
.main-nav {
    background-color: var(--bg-secondary-color);
    padding: 0 1.5rem;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.03);
    border-bottom: none;
    transition: background-color 0.3s ease, box-shadow 0.3s ease;
}

#topCategory,
#adminCategory {
    padding: 0.5rem 0;
}

#adminCategory {
    border-top: 1px dashed var(--border-color);
    padding-top: 0.5rem;
    margin-bottom: 0;
    transition: border-color 0.3s ease;
}

#topCategory .nav-links,
/* 메인 카테고리 슬라이더 */
#adminCategory ul {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    align-items: center;
}

#topCategory .nav-links li,
#adminCategory li {
    margin-right: 1.5rem;
}

#topCategory .nav-links li:last-child,
#adminCategory li:last-child {
    margin-right: 0;
}

#topCategory .nav-links a,
#adminCategory a {
    color: var(--text-secondary-color);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    padding: 0.2rem 0;
    /* 상하 패딩 줄임 */
    border-bottom: 2px solid transparent;
    transition: var(--transition-base), color 0.3s ease;
    position: relative;
}

#adminCategory a {
    font-size: 0.85rem;
    color: var(--secondary-color);
    font-weight: 500;
    margin-left: 0;
    /* adminCategory 내부 링크 간격은 li에서 처리 */
}

#adminCategory li>a {
    margin-right: 1rem;
}

#adminCategory li>a:last-child {
    margin-right: 0;
}

#topCategory .nav-links a::after,
#adminCategory a::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: -1px;
    left: 0;
    background-color: var(--primary-color);
    transition: width 0.3s ease;
    transform: none;
}

#adminCategory a::after {
    background-color: var(--secondary-color);
}

#topCategory .nav-links a:hover::after,
#topCategory .nav-links li.active a::after,
#adminCategory a:hover::after {
    width: 100%;
}

#topCategory .nav-links a:hover,
#topCategory .nav-links li.active a,
#adminCategory a:hover {
    color: var(--primary-color);
    border-bottom-color: transparent;
    text-decoration: none;
}

#adminCategory a:hover {
    color: var(--secondary-color);
}

/* --- End Header Styles --- */


/* ==========================================================================
   Content Area Styles
   ========================================================================== */

.content-container {
    flex: 1;
    max-width: 3740px;
    width: 100%;
    margin: 0.1rem auto;
    padding: 0 1.5rem;
    box-sizing: border-box;
}

.middle-area {
    background-color: var(--bg-secondary-color);
    padding: 3rem;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    text-align: left;
    margin: 0;
    max-width: none;
    flex: none;
    border: 1px solid var(--border-color);
    transition: background-color 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

.middle-area h1,
.middle-area h2 {
    color: var(--text-color);
    margin-top: 0;
    margin-bottom: 1.2rem;
    font-weight: 600;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0.5rem;
    letter-spacing: -0.5px;
    transition: color 0.3s ease, border-color 0.3s ease;
}

.middle-area h1 {
    font-size: 1.8rem;
}

.middle-area h2 {
    font-size: 1.2rem;
}

.middle-area p {
    font-size: 1rem;
    color: var(--text-secondary-color);
    margin-bottom: 1.3rem;
    line-height: 1.8;
    transition: color 0.3s ease;
}

.middle-area hr {
    border: none;
    border-top: 1px solid var(--border-color);
    margin: 2.5rem 0;
    transition: border-color 0.3s ease;
}

.category-details-section {
    background-color: var(--bg-secondary-color);
    padding: 0.3rem 2.5rem 0.5rem 2.5rem;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    border: 1px solid var(--border-color);
    margin-bottom: 0;
    margin-top: 12px;
    transition: background-color 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

.category-details-section h1 {
    margin-top: 0;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
    font-size: 1.7rem;
    font-weight: 600;
    color: var(--text-color);
    transition: color 0.3s ease, border-color 0.3s ease;
}

.node-description-content {
    line-height: 1.8;
    color: var(--text-secondary-color);
    transition: color 0.3s ease;
}

.node-description-content h3 {
    margin-top: 1.5rem;
    margin-bottom: 0.8rem;
    font-size: 1.2rem;
    color: var(--text-color);
    font-weight: 600;
}

.node-description-content p {
    margin-bottom: 1rem;
}

.content-container>.btn-secondary {
    margin-top: 1rem;
}

/* ==========================================================================
   Footer Styles
   ========================================================================== */

.bottom-area {
    display: flex;
    /* Flexbox 사용 */
    flex-wrap: wrap;
    /* 내용 많을 시 줄바꿈 허용 */
    justify-content: center;
    /* 기본 중앙 정렬 */
    align-items: center;
    /* 수직 중앙 정렬 */
    padding: 2rem 1.5rem;
    /* 패딩 조정 */
    font-size: 0.85rem;
    color: var(--text-secondary-color);
    background-color: var(--bg-color);
    border-top: 1px solid var(--border-color);
    margin-top: auto;
    border-radius: 0;
    transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease;
}

.bottom-area>* {
    /* 푸터 직계 자식 요소들 간 간격 */
    margin: 0.5rem 0.75rem;
}

.bottom-area a {
    color: var(--secondary-color);
    text-decoration: none;
    /* margin 제거 (부모에서 처리) */
    font-weight: 500;
}

.bottom-area a:hover {
    color: #8cf0d9;
    text-decoration: underline;
}

.bottom-area #languageSelect {
    /* 기본 브라우저 스타일 사용 또는 커스텀 스타일 추가 */
    padding: 0.2rem 0.4rem;
    font-size: 0.8rem;
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    background-color: var(--bg-secondary-color);
    color: var(--text-color);
}

/* Footer User Controls (Profile Pic & Theme Toggle) */
.footer-user-controls {
    display: flex;
    align-items: center;
    margin-left: auto;
    /* 오른쪽 끝으로 이동 (Flexbox 컨테이너 내에서) */
}

.footer-profile-picture {
    margin-right: 0.5rem;
    /* 프로필 사진과 테마 버튼 사이 간격 */
}

/* Footer 내의 Theme Toggle Button 스타일 */
.bottom-area #theme-toggle-button {
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1rem;
    /* 아이콘 크기 조정 */
    color: var(--text-secondary-color);
    padding: 0;
    transition: opacity 0.2s ease;
    /* margin 제거 (부모에서 처리) */
    width: auto;
    /* 자동 너비 */
    height: auto;
    /* 자동 높이 */
}

.bottom-area #theme-toggle-button:hover {
    opacity: 0.7;
}


/* ==========================================================================
   Dark Mode Styles
   ========================================================================== */

body.dark-mode {
    --bg-color: #1e1e1e;
    --bg-secondary-color: #2d2d2d;
    --bg-tertiary-color: #3c3c3c;
    --text-color: #f0f0f0;
    --text-secondary-color: #c5c5c5;
    --border-color: #4a4a4a;
    --link-color: #6bb8ff;
    --link-hover-color: #91ceff;
    --primary-color: #6bb8ff;
    --secondary-color: #70e0c8;
    --accent-color: #ffd580;
    --text-color-light: #0a0a0a;

    background-color: var(--bg-color);
    color: var(--text-color);
}

/* Dark Mode - Header */
body.dark-mode .site-header,
body.dark-mode .main-nav {
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.25);
}

body.dark-mode .dark-mode-select {
    background-color: var(--bg-secondary-color) !important;
    color: var(--text-color) !important;
    border-color: var(--border-color) !important;
}

body.dark-mode .category-history-slider-container .history-links a {
    color: var(--text-secondary-color);
}

body.dark-mode .category-history-slider-container .history-links a:hover {
    background-color: var(--bg-tertiary-color);
    color: var(--link-color);
}

body.dark-mode .category-history-slider-container .history-separator {
    color: var(--text-secondary-color);
}

body.dark-mode .history-slider-button {
    background-color: rgba(45, 45, 45, 0.7);
    border-color: var(--border-color);
    color: var(--text-secondary-color);
}

body.dark-mode .history-slider-button:hover {
    background-color: rgba(60, 60, 60, 0.9);
}

body.dark-mode #login-button:hover,
body.dark-mode #logout-button:hover {
    background-color: var(--link-hover-color);
    /* Consider a darker hover for buttons */
}

body.dark-mode #adminCategory a:hover {
    color: #8cf0d9;
}

/* Dark Mode - Content & Table */
body.dark-mode .middle-area,
body.dark-mode table {
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.25);
}

body.dark-mode button.btn-primary {
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

body.dark-mode button.btn-primary:hover {
    box-shadow: 0 5px 10px rgba(0, 0, 0, 0.3);
}

body.dark-mode button.btn-secondary {
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

body.dark-mode button.btn-secondary:hover {
    box-shadow: 0 5px 10px rgba(0, 0, 0, 0.3);
}

body.dark-mode button.btn-outline-primary:hover {
    background-color: var(--primary-color);
    color: var(--text-color-light);
}

body.dark-mode table th {
    background-color: #333;
}

body.dark-mode .middle-area h1,
body.dark-mode .middle-area h2 {
    color: #ffffff !important;
}

body.dark-mode .category-details-section {
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.25);
}

/* Dark Mode - Footer */
body.dark-mode .bottom-area {
    background-color: var(--bg-color);
    border-top-color: var(--border-color);
    color: var(--text-secondary-color);
}

body.dark-mode .bottom-area a {
    color: var(--secondary-color);
}

body.dark-mode .bottom-area a:hover {
    color: #8cf0d9;
}

body.dark-mode .bottom-area #languageSelect {
    border-color: var(--border-color);
    background-color: var(--bg-secondary-color);
    color: var(--text-color);
}

body.dark-mode .bottom-area #theme-toggle-button {
    color: var(--text-secondary-color);
}

/* Dark Mode - Bootstrap Modal */
body.dark-mode .modal-content {
    background-color: var(--bg-secondary-color);
    /* 다크모드 부모 배경색과 유사하게 */
    color: var(--text-color);
    /* 다크모드 기본 텍스트 색상 */
    border-color: var(--border-color);
}

body.dark-mode .modal-header {
    border-bottom-color: var(--border-color);
}

body.dark-mode .modal-header .btn-close {
    filter: invert(1) grayscale(100%) brightness(200%);
    /* Bootstrap 다크모드 닫기 버튼 스타일 */
}

body.dark-mode .modal-footer {
    border-top-color: var(--border-color);
}

/* Dark Mode - Rendered Markdown in Modal */
body.dark-mode .rendered-markdown {
    color: var(--text-color);
    /* 기본 텍스트 색상 */
}

body.dark-mode .rendered-markdown h1,
body.dark-mode .rendered-markdown h2,
body.dark-mode .rendered-markdown h3,
body.dark-mode .rendered-markdown h4,
body.dark-mode .rendered-markdown h5,
body.dark-mode .rendered-markdown h6 {
    color: var(--text-color);
    /* 제목 색상 */
}

body.dark-mode .rendered-markdown p {
    color: var(--text-secondary-color);
    /* 본문 단락은 약간 더 어두운 텍스트 색상 */
}

body.dark-mode .rendered-markdown a {
    color: var(--link-color);
    /* 링크 색상 */
}

body.dark-mode .rendered-markdown a:hover {
    color: var(--link-hover-color);
}

body.dark-mode .rendered-markdown pre {
    background-color: var(--bg-color);
    /* 코드 블록 배경 */
    color: var(--text-color);
    /* 코드 블록 텍스트 */
    border: 1px solid var(--border-color);
}

body.dark-mode .rendered-markdown code {
    background-color: var(--bg-tertiary-color);
    /* 인라인 코드 배경 */
    color: var(--text-color);
    padding: 0.2em 0.4em;
    border-radius: 3px;
}

body.dark-mode .rendered-markdown blockquote {
    border-left-color: var(--border-color);
    color: var(--text-secondary-color);
}

body.dark-mode .rendered-markdown table th,
body.dark-mode .rendered-markdown table td {
    border-color: var(--border-color);
    color: var(--text-color);
}

body.dark-mode .rendered-markdown table th {
    background-color: var(--bg-tertiary-color);
}

/* Dark Mode - Raw Content Modal Pre Area */
body.dark-mode #viewRawContentModal .modal-body pre#rawContentDisplayArea {
    background-color: var(--bg-color) !important;
    /* 다크모드 기본 배경색, 인라인 스타일 덮어쓰기 위해 !important 사용 */
    color: var(--text-color) !important;
    /* 다크모드 기본 텍스트 색상 */
    border: 1px solid var(--border-color);
}


/* Dark Mode - D3 Graph */
body.dark-mode .chart-container {
    background-color: #2d2d2d;
    border-color: #4a4a4a;
}

body.dark-mode .chart-title {
    color: #f0f0f0;
}

body.dark-mode .axis path,
body.dark-mode .axis line {
    stroke: #777;
}

body.dark-mode .link-label {
    fill: var(--text-color);
}

body.dark-mode svg .node-label {
    fill: var(--text-color);
}

body.dark-mode .tooltip {
    background: #444;
    color: #eee;
    border: 1px solid #666;
}

body.dark-mode .date-picker-container label {
    color: #f0f0f0;
}

body.dark-mode input[type="date"] {
    background-color: #3c3c3c;
    color: #f0f0f0;
    border: 1px solid #4a4a4a;
}

/* Generated Blog Content Display */
#generatedContentDisplay {
    background-color: var(--bg-secondary-color);
    border-radius: var(--border-radius);
    /* padding, min-height, border는 blogWrite.html의 #generatedContentDisplay div 스타일에 유지 */
}

#generatedContentDisplay h4 {
    color: var(--text-color);
    margin-top: 0;
    margin-bottom: 0.75rem;
}

#generatedContentDisplay pre {
    background-color: var(--bg-color);
    color: var(--text-color);
    /* padding, border-radius, white-space, word-wrap은 blogWrite.html의 pre 태그 스타일에 유지 */
    border: 1px solid var(--border-color);
}

/* Dark Mode - Generated Blog Content Display */
body.dark-mode #generatedContentDisplay {
    background-color: var(--bg-secondary-color);
}

body.dark-mode #generatedContentDisplay h4 {
    color: var(--text-color);
}

body.dark-mode #generatedContentDisplay pre {
    background-color: var(--bg-color);
    color: var(--text-color);
    border-color: var(--border-color);
}

/* Dark Mode - Video Cards */
body.dark-mode .video-card {
    background-color: var(--bg-secondary-color);
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.3);
}

body.dark-mode .video-title a {
    color: var(--text-color);
}

body.dark-mode .video-title a:hover {
    color: var(--link-hover-color);
}

/* ==========================================================================
   Component Styles (Sliders, Cards, etc.)
   ========================================================================== */

/* --- Video Card Styles (YouTube-like) --- */
.video-grid-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 24px;
    padding: 0 20px;
}

@media (max-width: 600px) {
    .video-grid-container {
        grid-template-columns: 1fr;
        padding: 0 16px;
        gap: 20px;
    }
}

.video-card {
    background-color: transparent;
    border-radius: 0;
    box-shadow: none;
    overflow: visible;
    display: flex;
    flex-direction: column;
    height: auto;
    transition: none;
    border: none;
}

.video-card:hover {
    transform: none;
    /* YouTube doesn't lift cards */
    box-shadow: none;
}

/* Autocomplete Dropdown Styles */
.autocomplete-dropdown {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    border: 1px solid var(--border-color);
    border-top: none;
    z-index: 1050;
    /* Higher than typical overlay */
    max-height: 200px;
    overflow-y: auto;
    background-color: var(--bg-secondary-color);
    border-radius: 0 0 4px 4px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.autocomplete-item {
    padding: 8px 12px;
    cursor: pointer;
    border-bottom: 1px solid var(--border-color);
    font-size: 0.9rem;
    color: var(--text-color);
    transition: background-color 0.2s;
}

.autocomplete-item:last-child {
    border-bottom: none;
}

.autocomplete-item:hover {
    background-color: var(--bg-tertiary-color);
    /* Highlight color */
    color: var(--primary-color);
}

.video-thumbnail {
    position: relative;
    width: 100%;
    padding-top: 56.25%;
    /* 16:9 */
    overflow: hidden;
    border-radius: 12px;
    /* YouTube style rounded corners */
    background-color: #000;
}

.video-thumbnail img,
.video-thumbnail .youtube-player-placeholder,
.video-thumbnail iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.video-thumbnail:hover img {
    transform: none;
    /* Remove zoom effect for cleaner look */
    border-radius: 0;
    /* Keep valid check */
}

/* Pagination custom styles */
/* .custom-pagination 및 .inline-pagination-controls 관련 스타일 제거 또는 주석 처리 */
/* Bootstrap 자체 클래스로 최대한 제어 시도 */

.play-icon {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 48px;
    color: #FF0000;
    /* YouTube Red */
    pointer-events: none;
    opacity: 0.9;
    transition: opacity 0.2s ease;
    background: white;
    border-radius: 50%;
    width: 48px;
    height: 48px;
    display: flex;
    justify-content: center;
    align-items: center;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
}

.video-thumbnail a:hover .play-icon {
    opacity: 1;
    transform: translate(-50%, -50%) scale(1.1);
}

.video-info {
    padding: 12px 0 0 0;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.video-title {
    font-size: 1rem;
    font-weight: 600;
    margin: 0 0 6px 0;
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    text-overflow: ellipsis;
    height: auto;
    max-height: 2.8em;
}

.video-title a {
    color: var(--text-color);
    text-decoration: none;
    transition: color 0.2s ease;
}

.video-title a:hover {
    text-decoration: none;
    color: var(--text-color);
}

.video-channel {
    font-size: 0.9rem;
    color: var(--text-secondary-color);
    margin: 0;
    line-height: 1.2;
}

.news-date {
    font-size: 0.9rem;
    color: var(--text-secondary-color);
    margin: 0;
    line-height: 1.2;
}

/* --- Category Slider (Main Nav) --- */
.category-slider-container {
    position: relative;
    display: flex;
    align-items: center;
    overflow: hidden;
    padding: 0.5rem 0;
}

.category-scroll-wrapper {
    flex-grow: 1;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    -ms-overflow-style: none;
    white-space: nowrap;
}

.category-scroll-wrapper::-webkit-scrollbar {
    display: none;
}

.category-scroll-wrapper .nav-links {
    display: inline-block;
    padding: 0;
    margin: 0;
    vertical-align: middle;
}

.category-scroll-wrapper .nav-links li {
    display: inline-block;
    margin-right: 1.5rem;
    vertical-align: middle;
}

.category-scroll-wrapper .nav-links li:last-child {
    margin-right: 0;
}

.category-scroll-wrapper .nav-links a {
    white-space: nowrap;
    display: inline-block;
    padding: 0.5rem 0;
}

/* --- General Slider Buttons (for Main Nav Category Slider) --- */
.slider-button {
    display: flex;
    justify-content: center;
    align-items: center;
    /* Hide by default */
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background-color: rgba(255, 255, 255, 0.8);
    border: 1px solid var(--border-color);
    border-radius: 50%;
    width: 30px;
    height: 30px;
    font-size: 1rem;
    font-weight: bold;
    color: var(--text-secondary-color);
    cursor: pointer;
    z-index: 10;
    transition: background-color 0.2s ease, box-shadow 0.2s ease;
    padding: 0;
    line-height: 28px;
    text-align: center;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.slider-button.prev {
    left: 5px;
}

.slider-button.next {
    right: 5px;
}

.slider-button:hover {
    background-color: rgba(255, 255, 255, 1);
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.15);
}

.slider-button.hidden {
    /* display: none; */
    opacity: 0.3;
    pointer-events: none;
    cursor: default;
}

/* Pagination Styles */
.pagination-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
    /* mb-3 */
    padding: 0.5rem 0;
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

.page-size-selector label {
    margin-right: 0.5rem;
    font-size: 0.9rem;
    color: var(--text-secondary-color);
}

.page-size-selector select {
    display: inline-block;
    width: auto;
    padding: 0.375rem 1.75rem 0.375rem 0.75rem;
    /* Bootstrap form-select-sm padding */
    font-size: 0.875rem;
    /* Bootstrap form-select-sm font-size */
    font-weight: 400;
    line-height: 1.5;
    color: var(--text-color);
    background-color: var(--bg-secondary-color);
    background-clip: padding-box;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    transition: border-color .15s ease-in-out, box-shadow .15s ease-in-out;
}

.pagination-nav {
    white-space: nowrap;
    overflow-x: auto;
    /* 내용이 넘칠 경우 스크롤 (필요시) */
    text-align: right;
}

.pagination-nav span {
    margin-right: 5px;
    display: inline-block;
    /* span도 inline-block으로 */
}

.pagination-nav span:last-child {
    margin-right: 0;
}

.pagination-link {
    padding: 0.375rem 0.75rem;
    text-decoration: none;
    color: var(--link-color);
    border: 1px solid transparent;
    border-radius: var(--border-radius);
    transition: var(--transition-base);
}

.pagination-link:hover {
    background-color: var(--bg-tertiary-color);
    border-color: var(--border-color);
    color: var(--link-hover-color);
}

.pagination-nav .active-page-span .pagination-link {
    font-weight: bold;
    color: var(--text-color-light);
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

.pagination-nav .active-page-span .pagination-link:hover {
    color: var(--text-color-light);
    background-color: var(--link-hover-color);
    border-color: var(--link-hover-color);
}


.pagination-nav .disabled-link-span .pagination-link {
    color: var(--text-secondary-color);
    pointer-events: none;
    cursor: default;
    opacity: 0.6;
}

.pagination-nav .disabled-link-span .pagination-link:hover {
    background-color: transparent;
    border-color: transparent;
}

/* Dark mode pagination adjustments if needed */
body.dark-mode .page-size-selector select {
    color: var(--text-color);
    background-color: var(--bg-secondary-color);
    border-color: var(--border-color);
}

body.dark-mode .pagination-link {
    color: var(--link-color);
}

body.dark-mode .pagination-link:hover {
    background-color: var(--bg-tertiary-color);
    border-color: var(--border-color);
    color: var(--link-hover-color);
}

body.dark-mode .pagination-nav .active-page-span .pagination-link {
    color: var(--text-color-light);
    /* Or a specific dark mode active text color */
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

body.dark-mode .pagination-nav .active-page-span .pagination-link:hover {
    background-color: var(--link-hover-color);
    border-color: var(--link-hover-color);
}

body.dark-mode .pagination-nav .disabled-link-span .pagination-link {
    color: var(--text-secondary-color);
}


/* ==========================================================================
   Media Queries & Responsive Adjustments
   ========================================================================== */

/* Mobile & Landscape Header Scroll Effect */
@media (max-width: 992px),
screen and (max-height: 600px) {
    .site-header {
        position: sticky !important;
        top: 0 !important;
        transition: transform 0.3s ease-in-out !important;
        z-index: 1000;
        transform: none !important;
        /* 모바일/가로모드 평소 상태 */
    }

    .site-header.header-hidden {
        transform: translateY(-100%) !important;
    }
}

/* Narrow Screens - Show Slider Buttons, Adjust Layouts */
@media (max-width: 1024px) {

    /* History Slider Buttons */
    .history-slider-button {
        display: block;
    }
}

@media (max-width: 768px) {

    /* Main Nav Category Slider Buttons */
    .category-slider-container {
        padding: 0.5rem 40px;
        /* Add padding for buttons */
    }

    .category-scroll-wrapper .nav-links li {
        margin-right: 1rem;
        /* Adjust spacing */
    }

    /* Stack Admin Links */
    .main-nav {
        padding: 0;
        /* Remove nav padding */
    }

    #adminCategory {
        display: flex;
        flex-direction: column;
        align-items: flex-start;
        padding: 0.5rem 1rem;
        border-top: 1px solid var(--border-color);
    }

    #adminCategory a {
        margin-left: 0;
        margin-bottom: 0.5rem;
        padding: 0.2rem 0;
        font-size: 0.9rem;
    }

    #adminCategory a:last-child {
        margin-bottom: 0;
    }

    #adminCategory a::after {
        bottom: -3px;
    }
}