/* ===== CSS 리셋 및 기본 설정 ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* 색상 변수 */
    --primary-color: #2c3e50;
    --secondary-color: #3498db;
    --accent-color: #e74c3c;
    --success-color: #27ae60;
    --warning-color: #f39c12;
    --text-color: #2c3e50;
    --text-light: #7f8c8d;
    --bg-color: #ffffff;
    --bg-light: #f8f9fa;
    --border-color: #e9ecef;
    
    /* 그라데이션 */
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-secondary: linear-gradient(135deg, #74b9ff 0%, #0984e3 100%);
    --gradient-accent: linear-gradient(135deg, #ff6b6b 0%, #ee5a24 100%);
    
    /* 폰트 */
    --font-primary: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    
    /* 간격 */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    
    /* 그림자 */
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.1);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 15px rgba(0,0,0,0.1);
    --shadow-xl: 0 20px 25px rgba(0,0,0,0.1);
    
    /* 반응형 브레이크포인트 */
    --breakpoint-sm: 640px;
    --breakpoint-md: 768px;
    --breakpoint-lg: 1024px;
    --breakpoint-xl: 1280px;
}

body {
    font-family: var(--font-primary);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--bg-light);
    overflow-x: hidden;
}

/* ===== 헤더 및 네비게이션 ===== */
.header {
    background: white;
    color: var(--text-color);
    padding: var(--spacing-md) 0;
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    box-shadow: var(--shadow-lg);
    backdrop-filter: blur(10px);
    transition: all 0.3s ease;
    border-bottom: 1px solid var(--border-color);
}

.header.scrolled {
    padding: var(--spacing-sm) 0;
    box-shadow: var(--shadow-xl);
}

.navbar {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-xl);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    min-height: 70px;
}

.nav-logo {
    display: flex;
    align-items: center;
    z-index: 1001;
}

.logo-container {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    transition: transform 0.3s ease;
}

.logo-container:hover {
    transform: scale(1.05);
}

.english-logo {
    height: 45px;
    width: auto;
    transition: transform 0.3s ease;
}

.korean-logo {
    height: 45px;
    width: auto;
    transition: transform 0.3s ease;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--spacing-xs);
    align-items: center;
    background: var(--bg-light);
    padding: var(--spacing-sm);
    border-radius: 50px;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
}

.nav-item {
    position: relative;
}

.nav-link {
    color: var(--text-color);
    text-decoration: none;
    font-weight: 500;
    font-size: var(--font-size-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: 25px;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    white-space: nowrap;
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 80px;
    text-align: center;
}

.nav-link::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: var(--gradient-primary);
    transition: left 0.3s ease;
    z-index: -1;
    border-radius: 25px;
}

.nav-link:hover::before {
    left: 0;
}

.nav-link:hover {
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    padding: var(--spacing-sm);
    z-index: 1001;
}

.bar {
    width: 25px;
    height: 3px;
    background-color: var(--text-color);
    margin: 3px 0;
    transition: 0.3s;
    border-radius: 2px;
}

.hamburger.active .bar:nth-child(1) {
    transform: rotate(-45deg) translate(-5px, 6px);
}

.hamburger.active .bar:nth-child(2) {
    opacity: 0;
}

.hamburger.active .bar:nth-child(3) {
    transform: rotate(45deg) translate(-5px, -6px);
}

/* ===== 메인 콘텐츠 ===== */
main {
    margin-top: 70px;
}

/* ===== 히어로 섹션 ===== */
.hero {
    background: var(--gradient-primary);
    color: white;
    padding: calc(var(--spacing-3xl) * 2) 0;
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grain" width="100" height="100" patternUnits="userSpaceOnUse"><circle cx="50" cy="50" r="1" fill="rgba(255,255,255,0.1)"/></pattern></defs><rect width="100" height="100" fill="url(%23grain)"/></svg>');
    opacity: 0.1;
    z-index: 1;
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-xl);
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: calc(var(--spacing-3xl) * 1.5);
    align-items: center;
    position: relative;
    z-index: 2;
}

.hero-content {
    text-align: left;
    animation: fadeInUp 1s ease-out;
}

.hero-title {
    font-size: var(--font-size-4xl);
    margin-bottom: var(--spacing-lg);
    font-weight: 700;
    line-height: 1.2;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
}

.hero-subtitle {
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-lg);
    opacity: 0.9;
    font-weight: 300;
    line-height: 1.4;
}

.hero-welcome {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-xl);
    opacity: 0.8;
    font-style: italic;
    color: #ffd700;
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.hero-image {
    display: flex;
    justify-content: center;
    align-items: center;
    animation: fadeInRight 1s ease-out 0.5s both;
}

.hero-main-image {
    max-width: 120%;
    height: auto;
    border-radius: 20px;
    box-shadow: var(--shadow-xl);
    transition: transform 0.3s ease;
    transform: scale(1.2);
}

.hero-main-image:hover {
    transform: scale(1.25);
}

/* ===== 버튼 스타일 ===== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-xl);
    background: var(--gradient-accent);
    color: white;
    text-decoration: none;
    border-radius: 50px;
    font-weight: 600;
    font-size: var(--font-size-base);
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left 0.5s ease;
}

.btn:hover::before {
    left: 100%;
}

.btn:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-xl);
}

.btn:active {
    transform: translateY(-1px);
}

.btn-primary {
    background: var(--gradient-accent);
}

.btn-secondary {
    background: var(--gradient-secondary);
}

.btn-outline {
    background: transparent;
    border: 2px solid white;
    color: white;
}

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

/* ===== 섹션 공통 스타일 ===== */
.section {
    padding: calc(var(--spacing-3xl) * 1.5) 0;
    position: relative;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-xl);
}

.section-header {
    text-align: center;
    margin-top: calc(var(--spacing-3xl) * 1.5);
    margin-bottom: calc(var(--spacing-3xl) * 1.2);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.section-header h2 {
    font-size: var(--font-size-3xl);
    margin-bottom: var(--spacing-md);
    color: var(--primary-color);
    font-weight: 700;
    position: relative;
    display: inline-block;
}

.section-header h2::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: var(--gradient-accent);
    border-radius: 2px;
}

.section-header p {
    font-size: var(--font-size-lg);
    color: var(--text-light);
    line-height: 1.6;
    white-space: nowrap;
}

/* ===== 소개 섹션 ===== */
.about {
    background: var(--bg-color);
    position: relative;
}

.about .section-header {
    margin-top: calc(var(--spacing-3xl) * 2);
}

.about::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.05) 0%, rgba(118, 75, 162, 0.05) 100%);
    z-index: 1;
}

.about .container {
    position: relative;
    z-index: 2;
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    align-items: center;
}

.about-text {
    font-size: var(--font-size-lg);
    line-height: 1.8;
    color: var(--text-color);
}

.about-text h3 {
    font-size: var(--font-size-2xl);
    margin-bottom: var(--spacing-lg);
    color: var(--primary-color);
    font-weight: 600;
}

.about-text p {
    margin-bottom: var(--spacing-lg);
}

.about-features {
    list-style: none;
    margin-top: var(--spacing-lg);
}

.about-features li {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    font-size: var(--font-size-base);
}

.about-features i {
    color: var(--success-color);
    font-size: var(--font-size-lg);
}

.about-image {
    position: relative;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: var(--shadow-xl);
    transition: transform 0.3s ease;
}

.about-image:hover {
    transform: translateY(-10px);
}

.about-main-image {
    width: 100%;
    height: auto;
    display: block;
    transition: transform 0.3s ease;
}

.about-image:hover .about-main-image {
    transform: scale(1.05);
}

/* ===== 서비스 섹션 ===== */
.services {
    background: var(--bg-light);
    position: relative;
}

.services .section-header {
    margin-top: calc(var(--spacing-3xl) * 1.8);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-xl);
}

.service-card {
    background: var(--bg-color);
    padding: var(--spacing-2xl);
    border-radius: 20px;
    text-align: center;
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    border: 1px solid var(--border-color);
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.service-card:hover::before {
    transform: scaleX(1);
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-xl);
    border-color: var(--secondary-color);
}

.service-icon {
    font-size: 3.5rem;
    color: var(--secondary-color);
    margin-bottom: var(--spacing-lg);
    transition: all 0.3s ease;
}

.service-card:hover .service-icon {
    transform: scale(1.1);
    color: var(--primary-color);
}

.service-title {
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-md);
    color: var(--primary-color);
    font-weight: 600;
}

.service-description {
    color: var(--text-light);
    line-height: 1.6;
    font-size: var(--font-size-base);
}

/* ===== 조직도 섹션 ===== */
.organization {
    background: var(--bg-color);
    position: relative;
}

.organization .section-header {
    margin-top: calc(var(--spacing-3xl) * 1.8);
}

.organization-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: var(--spacing-3xl);
    align-items: start;
}

.organization-info {
    padding: var(--spacing-xl);
    background: var(--bg-light);
    border-radius: 20px;
    box-shadow: var(--shadow-md);
}

.organization-info h3 {
    font-size: var(--font-size-2xl);
    margin-bottom: var(--spacing-lg);
    color: var(--primary-color);
    font-weight: 600;
}

.organization-info p {
    color: var(--text-light);
    line-height: 1.6;
    margin-bottom: var(--spacing-xl);
}

.organization-actions {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.organization-chart {
    background: var(--bg-color);
    border-radius: 20px;
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-lg);
    overflow-x: auto;
    border: 1px solid var(--border-color);
    display: flex;
    justify-content: center;
    align-items: center;
}

.org-chart-image {
    max-width: 100%;
    height: auto;
    border: none;
    outline: none;
    box-shadow: none;
    transition: transform 0.3s ease;
}

.org-chart-image:hover {
    transform: scale(1.02);
}

.org-chart-container {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100%;
    max-width: 100%;
}

/* 로고 섹션 제거됨 */

/* 조직 레벨 */
.org-level {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 1rem;
    width: 100%;
    position: relative;
}

/* 메인 조직 박스 (시안색) */
.org-box {
    background: #00bcd4;
    color: white;
    border: 2px solid #00bcd4;
    border-radius: 6px;
    padding: 0.6rem 1rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 2px 6px rgba(0,0,0,0.1);
    min-width: 100px;
    max-width: 120px;
    position: relative;
}

/* 보조 조직 박스 (연한 녹색) */
.org-side-box {
    background: #c8e6c9;
    color: #2c3e50;
    border: 2px solid #c8e6c9;
    border-radius: 6px;
    padding: 0.5rem 0.8rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 2px 6px rgba(0,0,0,0.1);
    min-width: 80px;
    max-width: 100px;
    position: absolute;
}

/* 부서 박스 (보라색) */
.org-level-4 .org-box {
    background: #9c27b0;
    color: white;
    border: 2px solid #9c27b0;
    min-width: 90px;
    max-width: 110px;
    padding: 0.5rem 0.8rem;
}

.org-box:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.15);
    border-color: #667eea;
}

/* 기존 h4, p 스타일 제거됨 - 아래에서 재정의됨 */

/* 호버 효과 */
.org-box:hover,
.org-side-box:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(0,0,0,0.15);
    opacity: 0.9;
}

/* 연결선 */
.org-connector {
    width: 2px;
    height: 1rem;
    background: #333;
    position: relative;
    margin: 0 auto;
}

.org-connector::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 4px;
    height: 4px;
    background: #333;
    border-radius: 50%;
}

/* 레벨별 연결선 */
.connector-1 {
    height: 0.56rem; /* 70%로 줄임 (0.8 * 0.7) */
}

.connector-2 {
    height: 1.25rem; /* 50% 늘림 (0.8 * 1.5) */
}

.connector-3 {
    height: 0.8rem;
}

/* 보조 조직들 위치 */
.org-side-orgs {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

.org-side-orgs .org-side-box {
    pointer-events: all;
}

/* 고문 (총회보다 아래, 이사장보다 위, 우측 정렬) */
.org-advisor {
    top: 18%;
    right: 15%;
}

/* 이사회 (이사장보다 아래, 대표이사보다 위, 좌측 정렬) */
.org-board {
    top: 44%;
    left: 15%;
}

/* 감사 (이사장보다 아래, 대표이사보다 위, 우측 정렬) */
.org-auditor {
    top: 44%;
    right: 15%;
}

/* 자문위원회 (대표이사와 동일한 수평선상, 우측 정렬) */
.org-advisory {
    top: 58%;
    right: 15%;
}

/* 보조 조직 연결선 */
.org-side-box::before {
    content: '';
    position: absolute;
    background: #333;
    z-index: -1;
}

/* 이사회와 감사를 연결하는 직선 제거 - 실제 이미지와 다름 */

/* 고문 연결선 (총회에서 고문으로) */
.org-advisor::before {
    top: -20%;
    left: -20px;
    width: 20px;
    height: 2px;
}

/* 이사회 연결선 (이사장에서 이사회로) */
.org-board::before {
    top: -20%;
    left: -20px;
    width: 20px;
    height: 2px;
}

/* 감사 연결선 (이사장에서 감사로) */
.org-auditor::before {
    top: -20%;
    right: -20px;
    width: 20px;
    height: 2px;
}

/* 자문위원회 연결선 (대표이사에서 자문위원회로) */
.org-advisory::before {
    top: 50%;
    right: -20px;
    width: 20px;
    height: 2px;
}

/* 이사회와 감사를 연결하는 수평선 (실제 이미지에 맞춤) */
.org-board::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 100%;
    width: calc(200% + 100px);
    height: 2px;
    background: #333;
    z-index: 1; /* z-index를 양수로 변경 */
}

/* 레벨별 특별 스타일 */
.org-level-1 {
    margin-bottom: 0.3rem;
}

.org-level-2 {
    margin: 0.3rem 0;
}

.org-level-3 {
    margin: 0.3rem 0;
}

.org-level-4 {
    margin-top: 0.3rem;
    gap: 0.3rem;
}

/* 조직 박스 내 텍스트 크기 조정 */
.org-box h4,
.org-side-box h4 {
    font-size: 0.8rem;
    margin: 0;
    line-height: 1.2;
}

.org-box p,
.org-side-box p {
    font-size: 0.7rem;
    margin: 0;
    line-height: 1.1;
}

/* 조직도 상세 모달 */
.org-detail-content {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    max-width: 500px;
    width: 90%;
    max-height: 80vh;
    overflow-y: auto;
    position: relative;
    animation: slideInUp 0.3s ease;
}

.org-detail-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid #eee;
}

.org-detail-header h3 {
    color: #2c3e50;
    font-size: 1.5rem;
    margin: 0;
}

.close-org-detail {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: #666;
    padding: 0.5rem;
    border-radius: 50%;
    transition: background-color 0.3s ease;
}

.close-org-detail:hover {
    background-color: #f0f0f0;
}

.org-detail-body {
    color: #555;
    line-height: 1.6;
}

.org-detail-body h4 {
    color: #2c3e50;
    margin: 1rem 0 0.5rem 0;
    font-size: 1.1rem;
}

.org-detail-body p {
    margin-bottom: 0.5rem;
}

@keyframes slideInUp {
    from {
        transform: translateY(50px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

/* 프로젝트 섹션 */
.projects {
    background: #f8f9fa;
}

.projects .section-header {
    margin-top: calc(var(--spacing-3xl) * 1.8);
}

.projects-filter {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 3rem;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 0.8rem 1.5rem;
    background: white;
    border: 2px solid #667eea;
    color: #667eea;
    border-radius: 25px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-weight: 600;
}

.filter-btn:hover,
.filter-btn.active {
    background: #667eea;
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(102, 126, 234, 0.3);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
    align-items: start;
    justify-items: stretch;
}

.project-card {
    background: white;
    padding: 1rem;
    border-radius: 12px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    animation: fadeInUp 0.5s ease forwards;
}

.project-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0,0,0,0.15);
}

.project-card.hidden {
    display: none;
}

.project-title {
    font-size: 1rem;
    font-weight: 600;
    color: #2c3e50;
    margin-bottom: 0.5rem;
}

.project-overview {
    font-size: 0.85rem;
    color: #666;
    line-height: 1.4;
    margin-bottom: 0.5rem;
}

.project-client {
    font-size: 0.8rem;
    color: #667eea;
    font-weight: 500;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 연락처 섹션 */
.contact {
    background: white;
}

.contact .section-header {
    margin-top: calc(var(--spacing-3xl) * 1.8);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
}

.contact-info {
    padding: 2rem;
    background: #f8f9fa;
    border-radius: 15px;
}

.contact-info h3 {
    color: #2c3e50;
    margin-bottom: 1.5rem;
    font-size: 1.5rem;
}

.contact-item {
    display: flex;
    align-items: center;
    margin-bottom: 1rem;
    color: #555;
}

.contact-item i {
    color: #667eea;
    margin-right: 1rem;
    width: 20px;
}

.map-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    margin-top: 12px;
    padding: 8px 16px;
    background: var(--gradient-primary);
    color: white;
    text-decoration: none;
    border-radius: 25px;
    font-size: var(--font-size-sm);
    font-weight: 500;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-sm);
}

.map-link:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    background: var(--primary-color);
    color: white;
    text-decoration: none;
}

.map-link i {
    font-size: var(--font-size-base);
    color: #ffd700;
}

/* 챗봇 스타일 */
.chatbot-container {
    background: white;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    overflow: hidden;
    height: 500px;
    display: flex;
    flex-direction: column;
}

.chatbot-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 1rem;
    text-align: center;
}

.chatbot-header h3 {
    margin: 0;
    font-size: 1.2rem;
}

.chatbot-messages {
    flex: 1;
    padding: 1rem;
    overflow-y: auto;
    background: #f8f9fa;
}

.message {
    margin-bottom: 1rem;
    display: flex;
    align-items: flex-start;
}

.message.user {
    justify-content: flex-end;
}

.message.bot {
    justify-content: flex-start;
}

.message-content {
    max-width: 70%;
    padding: 0.8rem 1rem;
    border-radius: 15px;
    font-size: 0.9rem;
    line-height: 1.4;
}

.message.user .message-content {
    background: #667eea;
    color: white;
    border-bottom-right-radius: 5px;
}

.message.bot .message-content {
    background: white;
    color: #333;
    border: 1px solid #e0e0e0;
    border-bottom-left-radius: 5px;
}

.chatbot-input {
    padding: 1rem;
    background: white;
    border-top: 1px solid #e0e0e0;
}

.input-group {
    display: flex;
    gap: 0.5rem;
}

.chatbot-input input {
    flex: 1;
    padding: 0.8rem;
    border: 1px solid #ddd;
    border-radius: 25px;
    outline: none;
    font-size: 0.9rem;
}

.chatbot-input input:focus {
    border-color: #667eea;
}

.send-btn {
    padding: 0.8rem 1.5rem;
    background: #667eea;
    color: white;
    border: none;
    border-radius: 25px;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

.send-btn:hover {
    background: #5a6fd8;
}

.chatbot-suggestions {
    padding: 1rem;
    background: #f8f9fa;
    border-top: 1px solid #e0e0e0;
}

.suggestions-title {
    font-size: 0.8rem;
    color: #666;
    margin-bottom: 0.5rem;
}

.suggestion-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.suggestion-btn {
    padding: 0.4rem 0.8rem;
    background: white;
    border: 1px solid #ddd;
    border-radius: 15px;
    cursor: pointer;
    font-size: 0.8rem;
    color: #666;
    transition: all 0.3s ease;
}

.suggestion-btn:hover {
    background: #667eea;
    color: white;
    border-color: #667eea;
}

/* 푸터 */
.footer {
    background: #2c3e50;
    color: white;
    text-align: center;
    padding: 2rem 0;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* ===== 반응형 디자인 ===== */
@media (max-width: 1200px) {
    .hero-container {
        grid-template-columns: 1fr;
        gap: var(--spacing-2xl);
        text-align: center;
    }
    
    .hero-content {
        text-align: center;
    }
    
    .hero-main-image {
        max-width: 100%;
        transform: scale(1.1);
    }
    
    .hero-main-image:hover {
        transform: scale(1.15);
    }
    
    .about-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-2xl);
    }
    
    .organization-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-2xl);
    }
}

@media (max-width: 1024px) {
    .projects-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .org-chart-container {
        width: 100%;
    }
    
    .org-chart-image {
        max-width: 100%;
        height: auto;
    }
    
    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .navbar {
        padding: 0 var(--spacing-md);
    }
    
    .hamburger {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background: white;
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: var(--shadow-xl);
        padding: var(--spacing-xl) 0;
        z-index: 999;
        border: 1px solid var(--border-color);
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .nav-menu li {
        margin: var(--spacing-md) 0;
    }
    
    .hero {
        padding: calc(var(--spacing-2xl) * 1.5) 0;
        min-height: 80vh;
    }
    
    .hero-title {
        font-size: var(--font-size-3xl);
    }
    
    .hero-subtitle {
        font-size: var(--font-size-lg);
    }
    
    .hero-buttons {
        justify-content: center;
        flex-direction: column;
        align-items: center;
    }
    
    .hero-main-image {
        max-width: 100%;
        transform: scale(1.05);
    }
    
    .hero-main-image:hover {
        transform: scale(1.1);
    }
    
    .section-header {
        margin-top: calc(var(--spacing-2xl) * 1.5);
    }
    
    .section-header h2 {
        font-size: var(--font-size-2xl);
    }
    
    .about-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .contact-content {
        grid-template-columns: 1fr;
    }
    
    .projects-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .services-grid {
        grid-template-columns: 1fr;
    }
    
    .org-chart-container {
        width: 100%;
    }
    
    .org-chart-image {
        max-width: 100%;
        height: auto;
    }
    
    .org-level {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
    
    .org-box,
    .org-side-box {
        min-width: 80px;
        max-width: 100px;
        padding: 0.4rem 0.6rem;
    }
    
    .org-box h4,
    .org-side-box h4 {
        font-size: 0.7rem;
    }
    
    .org-box p,
    .org-side-box p {
        font-size: 0.6rem;
    }
    
    .org-detail-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-sm);
    }
    
    .org-detail-content {
        width: 100%;
        margin: 0;
    }
    
    .org-detail-content ul {
        margin: 0;
    }
    
    .org-detail-content li {
        padding: var(--spacing-xs) 0;
        padding-left: 0;
        padding-right: -18px;
        margin-right: -18px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-md);
    }
    
    .hero {
        padding: calc(var(--spacing-xl) * 1.5) 0;
        min-height: 70vh;
    }
    
    .hero-title {
        font-size: var(--font-size-2xl);
    }
    
    .hero-subtitle {
        font-size: var(--font-size-base);
    }
    
    .hero-main-image {
        max-width: 100%;
        transform: scale(1.0);
    }
    
    .hero-main-image:hover {
        transform: scale(1.05);
    }
    
    .section-header {
        margin-top: calc(var(--spacing-xl) * 1.5);
    }
    
    .section-header h2 {
        font-size: var(--font-size-xl);
    }
    
    .section-header p {
        font-size: var(--font-size-base);
    }
    
    .projects-grid {
        grid-template-columns: 1fr;
    }
    
    .projects-filter {
        flex-direction: column;
        align-items: center;
    }
    
    .filter-btn {
        width: 200px;
    }
    
    .org-chart-container {
        width: 100%;
    }
    
    .org-chart-image {
        max-width: 100%;
        height: auto;
    }
    
    .service-card {
        padding: var(--spacing-lg);
    }
    
    .btn {
        padding: var(--spacing-sm) var(--spacing-lg);
        font-size: var(--font-size-sm);
    }
    
    .org-detail-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-md);
    }
    
    .org-detail-card {
        padding: var(--spacing-md);
    }
    
    .org-detail-header h4 {
        font-size: var(--font-size-base);
    }
    
    .org-detail-header i {
        font-size: var(--font-size-lg);
    }
    
    .org-detail-content {
        width: 100%;
        margin: 0;
    }
    
    .org-detail-content ul {
        margin: 0;
    }
    
    .org-detail-content li {
        padding: var(--spacing-xs) 0;
        padding-left: 0;
        padding-right: -18px;
        margin-right: -18px;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .footer-section a {
        padding: 8px 16px;
        font-size: 0.95rem;
    }
    
    .footer-section ul {
        flex-direction: column;
        gap: 0.3rem;
    }
}

/* ===== 애니메이션 ===== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes fadeInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideInUp {
    from {
        opacity: 0;
        transform: translateY(50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
}

@keyframes float {
    0%, 100% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(-10px);
    }
}

/* 애니메이션 클래스 */
.animate-fadeInUp {
    animation: fadeInUp 0.8s ease-out;
}

.animate-fadeInRight {
    animation: fadeInRight 0.8s ease-out;
}

.animate-fadeInLeft {
    animation: fadeInLeft 0.8s ease-out;
}

.animate-pulse {
    animation: pulse 2s infinite;
}

.animate-float {
    animation: float 3s ease-in-out infinite;
}

/* 스크롤 애니메이션 */
.scroll-animate {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease-out;
}

.scroll-animate.animate {
    opacity: 1;
    transform: translateY(0);
}

/* ===== 모달 기본 스타일 ===== */
.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0,0,0,0.5);
    animation: fadeIn 0.3s ease;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.modal.show {
    display: block;
    opacity: 1;
    visibility: visible;
}

.modal-content {
    background-color: white;
    margin: 5% auto;
    padding: 2rem;
    border-radius: 15px;
    width: 90%;
    max-width: 800px;
    max-height: 80vh;
    overflow-y: auto;
    animation: slideInUp 0.3s ease;
    position: relative;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid #eee;
}

.modal-header h3 {
    color: var(--primary-color);
    font-size: 1.5rem;
    margin: 0;
}

.close {
    color: #aaa;
    float: right;
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
    transition: color 0.3s ease;
    background: none;
    border: none;
    padding: 0;
    line-height: 1;
}

.close:hover {
    color: #000;
}

.modal-body {
    padding: 0;
}

/* ===== 조직도 상세보기 모달 ===== */
.org-modal-content {
    max-width: 1200px;
    width: 95%;
    max-height: 90vh;
    overflow-y: auto;
}

.org-detail-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-md);
    padding: var(--spacing-md);
}

.org-detail-card {
    background: var(--bg-color);
    border-radius: 15px;
    padding: var(--spacing-sm);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

/* 각 조직별 배경색 (파란색 계열) */
.org-detail-card:nth-child(1) { background: linear-gradient(135deg, #e3f2fd 0%, #bbdefb 100%); }
.org-detail-card:nth-child(2) { background: linear-gradient(135deg, #e1f5fe 0%, #b3e5fc 100%); }
.org-detail-card:nth-child(3) { background: linear-gradient(135deg, #e0f2f1 0%, #b2dfdb 100%); }
.org-detail-card:nth-child(4) { background: linear-gradient(135deg, #e8f5e8 0%, #c8e6c9 100%); }
.org-detail-card:nth-child(5) { background: linear-gradient(135deg, #f3e5f5 0%, #e1bee7 100%); }
.org-detail-card:nth-child(6) { background: linear-gradient(135deg, #fce4ec 0%, #f8bbd9 100%); }
.org-detail-card:nth-child(7) { background: linear-gradient(135deg, #fff3e0 0%, #ffcc80 100%); }
.org-detail-card:nth-child(8) { background: linear-gradient(135deg, #e0f7fa 0%, #b2ebf2 100%); }
.org-detail-card:nth-child(9) { background: linear-gradient(135deg, #e8eaf6 0%, #c5cae9 100%); }
.org-detail-card:nth-child(10) { background: linear-gradient(135deg, #f1f8e9 0%, #dcedc8 100%); }
.org-detail-card:nth-child(11) { background: linear-gradient(135deg, #fff8e1 0%, #ffecb3 100%); }
.org-detail-card:nth-child(12) { background: linear-gradient(135deg, #fafafa 0%, #e0e0e0 100%); }

.org-detail-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.org-detail-card:hover::before {
    transform: scaleX(1);
}

.org-detail-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: var(--secondary-color);
}

.org-detail-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-sm);
    border-bottom: 2px solid var(--bg-light);
}

.org-detail-header h4 {
    color: var(--primary-color);
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin: 0;
}

.org-detail-header i {
    color: var(--secondary-color);
    font-size: var(--font-size-xl);
}

.org-detail-content {
    color: var(--text-color);
    line-height: 1.6;
    width: 100%;
    margin: 0;
}

.org-detail-content p {
    margin-bottom: var(--spacing-sm);
    font-weight: 500;
}

.org-detail-content ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.org-detail-content li {
    padding: var(--spacing-xs) 0;
    position: relative;
    padding-left: 0;
    padding-right: -18px;
    margin-right: -18px;
    color: var(--text-light);
    font-size: var(--font-size-sm);
}

.org-detail-content li::before {
    content: '•';
    color: var(--secondary-color);
    font-weight: bold;
    position: absolute;
    left: -16px;
    margin-left: 0;
}

/* ===== 푸터 스타일 ===== */
.footer {
    background: #2c3e50;
    color: white;
    padding: 3rem 0 1rem;
    margin-top: 4rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h3,
.footer-section h4 {
    color: white;
    margin-bottom: 1rem;
    font-size: 1.2rem;
}

.footer-section:nth-child(2) {
    text-align: center;
}

.footer-section p {
    color: #bdc3c7;
    line-height: 1.6;
    margin-bottom: 0.5rem;
}

.footer-section ul {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    justify-content: center;
    align-items: center;
}

.footer-section li {
    margin-bottom: 0;
}

.footer-section a {
    color: #3498db;
    text-decoration: none;
    padding: 6px 12px;
    border-radius: 20px;
    background: rgba(52, 152, 219, 0.1);
    border: 1px solid rgba(52, 152, 219, 0.3);
    transition: all 0.3s ease;
    display: inline-block;
    font-size: 0.9rem;
}

.footer-section a:hover {
    background: #3498db;
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(52, 152, 219, 0.3);
}

.footer-bottom {
    border-top: 1px solid #34495e;
    padding-top: 1rem;
    text-align: center;
    color: #95a5a6;
    font-size: 0.9rem;
}