/* ===========================================
   Modern KSCI Website Styles
   건국대학교 스포츠융복합연구소
   =========================================== */

/* CSS Variables */
:root {
    /* Primary Colors */
    --primary-blue: #2563eb;
    --primary-blue-dark: #1e40af;
    --primary-blue-light: #3b82f6;
    --secondary-green: #10b981;
    --accent-cyan: #06b6d4;

    /* Neutral Colors */
    --text-dark: #1f2937;
    --text-gray: #6b7280;
    --text-light: #9ca3af;
    --bg-white: #ffffff;
    --bg-light: #f9fafb;
    --bg-gray: #f3f4f6;

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);

    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;

    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-full: 9999px;
}

/* Dark Mode Variables */
[data-theme="dark"] {
    --text-dark: #f9fafb;
    --text-gray: #d1d5db;
    --text-light: #9ca3af;
    --bg-white: #1f2937;
    --bg-light: #111827;
    --bg-gray: #374151;
}

/* Reset & Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    border: none;
}

section {
    border: none;
    outline: none;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: 'Noto Sans KR', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--bg-white);
    overflow-x: hidden;
    transition: background-color var(--transition-base), color var(--transition-base);
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

@media (max-width: 768px) {
    .container {
        padding: 0 var(--spacing-md);
    }
}

/* Loader */
.loader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--primary-blue-light) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10000;
    transition: opacity 0.5s ease, visibility 0.5s ease;
}

.loader.hidden {
    opacity: 0;
    visibility: hidden;
}

.loader-content {
    text-align: center;
    color: white;
}

.spinner {
    width: 60px;
    height: 60px;
    border: 4px solid rgba(255, 255, 255, 0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 1rem;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.loader-content p {
    font-size: 1.125rem;
    font-weight: 500;
    letter-spacing: 2px;
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
    transition: all var(--transition-base);
}

[data-theme="dark"] .navbar {
    background: rgba(31, 41, 55, 0.95);
}

.navbar.scrolled {
    box-shadow: var(--shadow-md);
}

.navbar .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: var(--spacing-sm);
    padding-bottom: var(--spacing-sm);
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.nav-logo {
    height: 50px;
    width: auto;
}

.nav-brand-text h1 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-blue);
    margin: 0;
}

.nav-brand-text p {
    font-size: 0.75rem;
    color: var(--text-gray);
    margin: 0;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--spacing-lg);
    align-items: center;
}

.nav-link {
    color: var(--text-dark);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
    position: relative;
}

.nav-link:hover, .nav-link.active {
    color: var(--primary-blue);
}

.mobile-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-xs);
}

.mobile-toggle span {
    width: 25px;
    height: 3px;
    background: var(--text-dark);
    border-radius: var(--radius-full);
    transition: all var(--transition-base);
}

.mobile-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(6px, 6px);
}

.mobile-toggle.active span:nth-child(2) {
    opacity: 0;
}

.mobile-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(6px, -6px);
}

.theme-toggle {
    background: var(--bg-light);
    border: 2px solid var(--bg-gray);
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition-base);
    color: var(--text-dark);
}

.theme-toggle:hover {
    background: var(--primary-blue);
    color: white;
    border-color: var(--primary-blue);
    transform: rotate(15deg);
}

/* Hero Section */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    border: none;
    outline: none;
}

/* Hero Slider */
.hero-slider {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
}

.hero-slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    opacity: 0;
    transition: opacity 1s ease-in-out;
}

.hero-slide.active {
    opacity: 1;
}

.hero-slide::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(31, 41, 55, 0.7) 0%, rgba(55, 65, 81, 0.6) 50%, rgba(75, 85, 99, 0.7) 100%);
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('data:image/svg+xml,<svg width="100" height="100" xmlns="http://www.w3.org/2000/svg"><circle cx="2" cy="2" r="1" fill="white" opacity="0.1"/></svg>');
    opacity: 0.2;
    z-index: 1;
}

.hero-particles {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

/* Slider Controls */
.slider-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    border: 2px solid rgba(255, 255, 255, 0.3);
    color: white;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: 1.25rem;
    transition: all var(--transition-base);
    z-index: 10;
    opacity: 0.7;
}

.slider-btn:hover {
    background: rgba(255, 255, 255, 0.3);
    opacity: 1;
    transform: translateY(-50%) scale(1.1);
}

.slider-btn-prev {
    left: 2rem;
}

.slider-btn-next {
    right: 2rem;
}

/* Slider Dots */
.slider-dots {
    position: absolute;
    bottom: 3rem;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 1rem;
    z-index: 10;
}

.slider-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.5);
    border: 2px solid rgba(255, 255, 255, 0.8);
    cursor: pointer;
    transition: all var(--transition-base);
}

.slider-dot:hover {
    background: rgba(255, 255, 255, 0.8);
    transform: scale(1.2);
}

.slider-dot.active {
    background: white;
    width: 30px;
    border-radius: 6px;
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    color: white;
    padding: var(--spacing-2xl) 0;
}

.hero-title {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 900;
    margin-bottom: var(--spacing-md);
    line-height: 1.2;
}

.hero-title-line {
    display: block;
    animation: fadeInUp 0.8s ease forwards;
    opacity: 0;
}

.hero-title-line:nth-child(1) {
    animation-delay: 0.2s;
}

.hero-title-line:nth-child(2) {
    animation-delay: 0.4s;
}

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

.hero-subtitle {
    font-size: clamp(1.5rem, 3vw, 2rem);
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    opacity: 0;
    animation: fadeInUp 0.8s ease 0.6s forwards;
}

.hero-description {
    font-size: clamp(1rem, 2vw, 1.25rem);
    margin-bottom: var(--spacing-xl);
    opacity: 0.95;
    line-height: 1.8;
    opacity: 0;
    animation: fadeInUp 0.8s ease 0.8s forwards;
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
    opacity: 0;
    animation: fadeInUp 0.8s ease 1s forwards;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 1rem 2rem;
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
    cursor: pointer;
    border: none;
    position: relative;
    overflow: hidden;
    outline: none;
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.btn:hover::before {
    width: 300px;
    height: 300px;
}

.btn span, .btn i {
    position: relative;
    z-index: 1;
}

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

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

.btn-secondary {
    background: rgba(255, 255, 255, 0.2);
    color: white;
    border: none;
}

.btn-secondary:hover {
    background: white;
    color: var(--primary-blue);
    transform: translateY(-3px);
}

.btn-outline {
    background: transparent;
    color: var(--primary-blue);
    border: none;
}

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

.btn-block {
    width: 100%;
    justify-content: center;
}

/* Scroll Indicator */
.scroll-indicator {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    text-align: center;
    color: white;
    opacity: 0;
    animation: fadeIn 1s ease 1.5s forwards, bounce 2s ease-in-out 2s infinite;
}

@keyframes fadeIn {
    to { opacity: 1; }
}

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

.mouse {
    width: 25px;
    height: 40px;
    border: 2px solid white;
    border-radius: var(--radius-xl);
    margin: 0 auto 0.5rem;
    position: relative;
}

.wheel {
    width: 3px;
    height: 8px;
    background: white;
    border-radius: var(--radius-full);
    position: absolute;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    animation: scroll 2s ease-in-out infinite;
}

@keyframes scroll {
    0% { opacity: 1; top: 8px; }
    100% { opacity: 0; top: 20px; }
}

.scroll-indicator p {
    font-size: 0.75rem;
    letter-spacing: 2px;
    text-transform: uppercase;
}

/* Stats Section */
.stats-section {
    padding: var(--spacing-2xl) 0;
    background: var(--bg-white);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-xl);
}

.stat-card {
    text-align: center;
    padding: var(--spacing-xl);
    background: var(--bg-light);
    border-radius: var(--radius-xl);
    transition: all var(--transition-base);
    border: 2px solid transparent;
}

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

.stat-icon {
    font-size: 3rem;
    color: var(--primary-blue);
    margin-bottom: var(--spacing-md);
    transition: all var(--transition-base);
}

.stat-card:hover .stat-icon {
    transform: scale(1.2) rotate(10deg);
}

.stat-number {
    font-size: 3.5rem;
    font-weight: 900;
    color: var(--primary-blue);
    line-height: 1;
    margin-bottom: var(--spacing-xs);
}

.stat-label {
    font-size: 1.125rem;
    color: var(--text-gray);
    font-weight: 600;
}

/* Section Headers */
.section-header {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
}

.section-tag {
    display: inline-block;
    padding: 0.5rem 1rem;
    background: linear-gradient(135deg, var(--primary-blue), var(--accent-cyan));
    color: white;
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    border-radius: var(--radius-full);
    margin-bottom: var(--spacing-md);
}

.section-title {
    font-size: clamp(2rem, 4vw, 2.5rem);
    font-weight: 900;
    color: var(--text-dark);
    margin-bottom: var(--spacing-sm);
}

.section-description {
    font-size: 1.125rem;
    color: var(--text-gray);
}

/* About Section */
.about-section {
    padding: var(--spacing-2xl) 0;
    background: var(--bg-light);
}

.about-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-xl);
}

.about-card {
    background: var(--bg-white);
    padding: var(--spacing-xl);
    border-radius: var(--radius-xl);
    text-align: center;
    transition: all var(--transition-base);
    border: 2px solid transparent;
}

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

.about-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--spacing-md);
    background: linear-gradient(135deg, var(--primary-blue), var(--accent-cyan));
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    color: white;
    transition: all var(--transition-base);
}

.about-card:hover .about-icon {
    transform: rotateY(360deg);
}

.about-card h3 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: var(--spacing-md);
}

.about-card p {
    color: var(--text-gray);
    line-height: 1.8;
}

/* Research Section */
.research-section {
    padding: var(--spacing-2xl) 0;
    background: var(--bg-white);
}

.research-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-xl);
}

.research-card {
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--accent-cyan) 100%);
    padding: var(--spacing-xl);
    border-radius: var(--radius-xl);
    color: white;
    position: relative;
    overflow: hidden;
    transition: all var(--transition-base);
    cursor: pointer;
}

.research-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, 0.1);
    transform: translateX(-100%);
    transition: transform var(--transition-slow);
}

.research-card:hover::before {
    transform: translateX(0);
}

.research-card:hover {
    transform: translateY(-10px) scale(1.02);
    box-shadow: var(--shadow-2xl);
}

.research-number {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    font-size: 5rem;
    font-weight: 900;
    opacity: 0.2;
    line-height: 1;
}

.research-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
}

.research-card h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    position: relative;
    z-index: 1;
}

.research-card p {
    margin-bottom: var(--spacing-md);
    opacity: 0.9;
    position: relative;
    z-index: 1;
}

.research-btn {
    background: white;
    color: var(--primary-blue);
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-lg);
    font-weight: 600;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    transition: all var(--transition-base);
    position: relative;
    z-index: 1;
}

.research-btn:hover {
    transform: translateX(5px);
    box-shadow: var(--shadow-lg);
}

/* Members Section */
.members-section {
    padding: var(--spacing-2xl) 0;
    background: var(--bg-light);
}

.members-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-xl);
}

.member-card {
    background: var(--bg-white);
    padding: var(--spacing-xl);
    border-radius: var(--radius-xl);
    text-align: center;
    transition: all var(--transition-base);
    border: 2px solid transparent;
    position: relative;
}

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

.member-card.director {
    border-color: var(--primary-blue);
    background: linear-gradient(to bottom, var(--bg-white) 0%, rgba(37, 99, 235, 0.05) 100%);
}

.member-badge {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    background: linear-gradient(135deg, var(--primary-blue), var(--accent-cyan));
    color: white;
    padding: 0.5rem 1rem;
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: 600;
}

.member-photo {
    width: 150px;
    height: 150px;
    margin: 0 auto var(--spacing-md);
    border-radius: 50%;
    overflow: hidden;
    border: 4px solid var(--primary-blue);
    position: relative;
}

.member-photo img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: all var(--transition-base);
}

.member-card:hover .member-photo img {
    transform: scale(1.1);
}

.member-avatar {
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--primary-blue), var(--accent-cyan));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 4rem;
    color: white;
}

.member-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(37, 99, 235, 0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: all var(--transition-base);
}

.member-card:hover .member-overlay {
    opacity: 1;
}

.member-social {
    display: flex;
    gap: var(--spacing-sm);
}

.member-social a {
    width: 40px;
    height: 40px;
    background: white;
    color: var(--primary-blue);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    transition: all var(--transition-base);
}

.member-social a:hover {
    transform: scale(1.2);
}

.member-name {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: var(--spacing-xs);
}

.member-position {
    color: var(--text-gray);
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.member-major {
    color: var(--primary-blue);
    font-weight: 500;
    margin-bottom: var(--spacing-xs);
}

.member-degree {
    color: var(--text-light);
    font-size: 0.875rem;
}

/* Organization Section */
.organization-section {
    padding: var(--spacing-2xl) 0;
    background: var(--bg-light);
}

.org-chart {
    max-width: 800px;
    margin: 0 auto;
    padding: var(--spacing-xl);
}

.org-top {
    display: flex;
    justify-content: center;
    align-items: center;
    margin-bottom: 3rem;
    position: relative;
    gap: 3rem;
}

/* 소장 왼쪽 점선 (자문위원회) */
.org-top::before {
    content: '';
    position: absolute;
    left: calc(50% - 140px);
    top: 50%;
    width: 60px;
    height: 2px;
    background-image: linear-gradient(to right, var(--primary-blue) 50%, transparent 50%);
    background-size: 8px 2px;
    background-repeat: repeat-x;
}

/* 소장 오른쪽 점선 (운영위원회) */
.org-top::after {
    content: '';
    position: absolute;
    right: calc(50% - 140px);
    top: 50%;
    width: 60px;
    height: 2px;
    background-image: linear-gradient(to right, var(--primary-blue) 50%, transparent 50%);
    background-size: 8px 2px;
    background-repeat: repeat-x;
}

/* 소장에서 아래로 내려가는 수직선 */
.org-chart > .org-top + * {
    position: relative;
}

/* Removed vertical and horizontal lines */
/* .org-chart::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 180px;
    width: 2px;
    height: 50px;
    background: var(--primary-blue);
    transform: translateX(-50%);
    z-index: 1;
}

.org-chart::after {
    content: '';
    position: absolute;
    left: 20%;
    right: 20%;
    top: 230px;
    height: 2px;
    background: var(--primary-blue);
    z-index: 1;
} */

.org-middle {
    display: none;
}

.org-bottom {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
    position: relative;
    margin-top: 4rem;
}

/* 각 부서로 내려가는 수직선 */
.org-bottom .org-department {
    position: relative;
}

.org-bottom .org-department::before {
    content: '';
    position: absolute;
    left: 50%;
    top: -50px;
    width: 2px;
    height: 50px;
    background: var(--primary-blue);
    transform: translateX(-50%);
}

.org-department {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.org-node {
    background: white;
    padding: 1.25rem 1.5rem;
    border-radius: 12px;
    text-align: center;
    min-width: 140px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    border: none;
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.org-node::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-blue), var(--accent-cyan));
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

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

.org-node:hover {
    transform: translateY(-8px) scale(1.05);
    box-shadow: 0 12px 24px rgba(37, 99, 235, 0.15);
}

.org-director {
    background: linear-gradient(135deg, #2563eb 0%, #1e40af 100%);
    color: white;
    min-width: 160px;
    padding: 1.5rem 2rem;
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
}

.org-director::before {
    background: linear-gradient(90deg, white, rgba(255, 255, 255, 0.5));
}

.org-director:hover {
    box-shadow: 0 16px 32px rgba(37, 99, 235, 0.4);
}

.org-advisory,
.org-committee {
    background: linear-gradient(135deg, #3b82f6 0%, #2563eb 100%);
    color: white;
    box-shadow: 0 3px 10px rgba(59, 130, 246, 0.25);
}

.org-advisory::before,
.org-committee::before {
    background: linear-gradient(90deg, white, rgba(255, 255, 255, 0.5));
}

.org-advisory:hover,
.org-committee:hover {
    box-shadow: 0 12px 24px rgba(59, 130, 246, 0.35);
}

.org-dept {
    background: linear-gradient(135deg, #60a5fa 0%, #3b82f6 100%);
    color: white;
    margin-bottom: 0.75rem;
    box-shadow: 0 3px 10px rgba(96, 165, 250, 0.25);
}

.org-dept::before {
    background: linear-gradient(90deg, white, rgba(255, 255, 255, 0.5));
}

.org-dept:hover {
    box-shadow: 0 12px 24px rgba(96, 165, 250, 0.35);
}

.org-icon {
    font-size: 1.75rem;
    margin-bottom: 0.5rem;
    opacity: 0.95;
}

.org-node h4 {
    font-size: 1rem;
    font-weight: 700;
    margin: 0;
    letter-spacing: -0.02em;
}

.org-sub-nodes {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    width: 100%;
}

.org-sub-node {
    background: rgba(255, 255, 255, 0.95);
    padding: 0.5rem 0.75rem;
    border-radius: 8px;
    font-size: 0.8rem;
    color: var(--text-dark);
    border: 1px solid rgba(37, 99, 235, 0.1);
    transition: all var(--transition-base);
    text-align: center;
    font-weight: 500;
}

.org-sub-node:hover {
    background: white;
    border-color: var(--primary-blue);
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(37, 99, 235, 0.1);
}

/* Timeline Section */
.timeline-section {
    padding: var(--spacing-2xl) 0;
    background: var(--bg-white);
}

.timeline {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(to bottom, var(--primary-blue), var(--accent-cyan));
    transform: translateX(-50%);
}

.timeline-item {
    display: flex;
    align-items: center;
    margin-bottom: var(--spacing-2xl);
    position: relative;
}

.timeline-item:nth-child(even) {
    flex-direction: row-reverse;
}

.timeline-dot {
    width: 20px;
    height: 20px;
    background: var(--primary-blue);
    border-radius: 50%;
    border: 4px solid var(--bg-white);
    box-shadow: var(--shadow-lg);
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    z-index: 1;
}

.timeline-content {
    background: var(--bg-light);
    padding: var(--spacing-xl);
    border-radius: var(--radius-xl);
    width: calc(50% - 40px);
    transition: all var(--transition-base);
    border: 2px solid transparent;
}

.timeline-item:nth-child(odd) .timeline-content {
    margin-right: auto;
    margin-left: 0;
}

.timeline-item:nth-child(even) .timeline-content {
    margin-left: auto;
    margin-right: 0;
}

.timeline-content:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-blue);
}

.timeline-year {
    display: inline-block;
    background: linear-gradient(135deg, var(--primary-blue), var(--accent-cyan));
    color: white;
    padding: 0.5rem 1rem;
    border-radius: var(--radius-full);
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.timeline-content h3 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: var(--spacing-xs);
}

.timeline-content p {
    color: var(--text-gray);
}

/* Achievements Section */
.achievements-section {
    padding: var(--spacing-2xl) 0;
    background: var(--bg-light);
}

.tabs {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    margin-bottom: var(--spacing-xl);
    flex-wrap: wrap;
}

.tab-btn {
    background: var(--bg-white);
    border: 2px solid var(--bg-gray);
    padding: 1rem 2rem;
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-base);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-weight: 600;
    color: var(--text-dark);
}

.tab-btn:hover {
    border-color: var(--primary-blue);
    transform: translateY(-3px);
}

.tab-btn.active {
    background: linear-gradient(135deg, var(--primary-blue), var(--accent-cyan));
    color: white;
    border-color: transparent;
}

.tab-badge {
    background: rgba(255, 255, 255, 0.3);
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-full);
    font-size: 0.875rem;
}

.tab-btn.active .tab-badge {
    background: rgba(255, 255, 255, 0.3);
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
    animation: fadeIn 0.5s ease;
}

.papers-list, .projects-list, .presentations-list {
    max-width: 900px;
    margin: 0 auto;
}

.paper-item {
    background: var(--bg-white);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-md);
    display: flex;
    gap: var(--spacing-md);
    align-items: start;
    transition: all var(--transition-base);
    border: 2px solid transparent;
}

.paper-item:hover {
    transform: translateX(10px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-blue);
}

.paper-number {
    flex-shrink: 0;
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--primary-blue), var(--accent-cyan));
    color: white;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.25rem;
}

.paper-content h4 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: var(--spacing-xs);
}

.paper-meta {
    color: var(--text-gray);
    font-size: 0.95rem;
    font-style: italic;
}

.project-item {
    background: var(--bg-white);
    padding: var(--spacing-xl);
    border-radius: var(--radius-xl);
    margin-bottom: var(--spacing-lg);
    transition: all var(--transition-base);
    border: 2px solid transparent;
}

.project-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-blue);
}

.project-badge {
    display: inline-block;
    padding: 0.5rem 1rem;
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

.project-badge.ongoing {
    background: linear-gradient(135deg, var(--secondary-green), #34d399);
    color: white;
}

.project-item h4 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: var(--spacing-md);
}

.project-desc {
    color: var(--text-gray);
    margin-bottom: var(--spacing-md);
    line-height: 1.8;
}

.project-agency {
    color: var(--primary-blue);
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.presentation-item {
    background: var(--bg-white);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-md);
    display: flex;
    gap: var(--spacing-md);
    align-items: center;
    transition: all var(--transition-base);
    border: 2px solid transparent;
}

.presentation-item:hover {
    transform: translateX(10px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-blue);
}

.presentation-item i {
    font-size: 2rem;
    color: var(--primary-blue);
    flex-shrink: 0;
}

.presentation-item p {
    color: var(--text-dark);
    margin: 0;
}

.load-more-container {
    text-align: center;
    margin-top: var(--spacing-xl);
}

/* Director Section */
.director-section {
    padding: var(--spacing-2xl) 0;
    background: linear-gradient(to bottom, rgba(37, 99, 235, 0.03) 0%, var(--bg-white) 100%);
    position: relative;
}

.director-content {
    display: grid;
    grid-template-columns: 300px 1fr;
    gap: var(--spacing-2xl);
    align-items: start;
}

.director-image {
    position: sticky;
    top: 100px;
}

.director-image img {
    width: 100%;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
}

.director-label {
    background: linear-gradient(135deg, var(--primary-blue), var(--accent-cyan));
    color: white;
    padding: var(--spacing-md);
    border-radius: var(--radius-lg);
    text-align: center;
    margin-top: var(--spacing-md);
}

.director-label h4 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 0.25rem;
}

.director-label p {
    margin: 0;
    opacity: 0.9;
}

.director-text h3 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: var(--spacing-lg);
}

.director-message p {
    color: var(--text-gray);
    line-height: 2;
    margin-bottom: var(--spacing-md);
    text-align: justify;
    font-size: 1.125rem;
}

.director-signature {
    margin-top: var(--spacing-xl);
    padding-top: var(--spacing-lg);
    border-top: 2px solid var(--bg-gray);
    text-align: right;
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: var(--spacing-md);
}

.director-name {
    font-weight: 700;
    color: var(--primary-blue);
    margin: 0;
}

.director-sign {
    height: 60px;
    width: auto;
    opacity: 0.9;
}

/* Contact Section */
.contact-section {
    padding: var(--spacing-2xl) 0;
    background: var(--bg-light);
}

.static-map-wrapper {
    position: relative;
    margin-bottom: var(--spacing-xl);
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    cursor: pointer;
    transition: all var(--transition-base);
}

.static-map-wrapper:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.15);
}

.static-map-image {
    width: 100%;
    height: 450px;
    object-fit: cover;
    display: block;
}

.map-overlay {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: rgba(37, 99, 235, 0.95);
    color: white;
    padding: var(--spacing-xl) var(--spacing-2xl);
    border-radius: var(--radius-xl);
    text-align: center;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    pointer-events: none;
}

.map-overlay i {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
    display: block;
}

.map-overlay p {
    font-size: 1.25rem;
    font-weight: 600;
    line-height: 1.6;
    margin: 0;
}

.location-info-box {
    background: var(--bg-white);
    padding: var(--spacing-xl);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    margin-bottom: var(--spacing-lg);
}

.location-info-item {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.location-info-item:last-child {
    margin-bottom: 0;
}

.location-info-item i {
    font-size: 1.5rem;
    color: var(--primary-blue);
    width: 30px;
    flex-shrink: 0;
}

.location-info-item strong {
    display: block;
    font-size: 1.1rem;
    color: var(--text-dark);
    margin-bottom: 0.25rem;
}

.location-info-item p {
    color: var(--text-gray);
    margin: 0;
}

.location-info-item a {
    color: var(--primary-blue);
    text-decoration: none;
    transition: all var(--transition-base);
}

.location-info-item a:hover {
    text-decoration: underline;
}

.map-action-buttons {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
}

.map-action-btn {
    padding: 1rem 2rem;
    border: none;
    border-radius: var(--radius-lg);
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    font-weight: 600;
    font-size: 1rem;
    transition: all var(--transition-base);
    min-width: 200px;
}

.map-action-btn:hover {
    transform: translateY(-3px);
}

.map-action-btn.kakao-btn {
    background: #FEE500;
    color: #000000;
}

.map-action-btn.kakao-btn:hover {
    background: #f5dc00;
    box-shadow: 0 8px 20px rgba(254, 229, 0, 0.3);
}

.map-action-btn.copy-address-btn {
    background: var(--primary-blue);
    color: white;
}

.map-action-btn.copy-address-btn:hover {
    background: var(--primary-blue-dark);
    box-shadow: 0 8px 20px rgba(37, 99, 235, 0.3);
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

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

.info-item {
    background: var(--bg-white);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    display: flex;
    gap: var(--spacing-md);
    transition: all var(--transition-base);
    border: 2px solid transparent;
}

.info-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-blue);
}

.info-icon {
    width: 60px;
    height: 60px;
    flex-shrink: 0;
    background: linear-gradient(135deg, var(--primary-blue), var(--accent-cyan));
    color: white;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

.info-content h4 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: var(--spacing-xs);
}

.info-content p {
    color: var(--text-gray);
    margin-bottom: 0.25rem;
}

.info-content a {
    color: var(--primary-blue);
    text-decoration: none;
    transition: all var(--transition-base);
}

.info-content a:hover {
    text-decoration: underline;
}

.map-buttons {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.map-btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    font-weight: 600;
    font-size: 0.95rem;
    transition: all var(--transition-base);
    width: 100%;
}

.naver-btn {
    background: #03C75A;
    color: white;
}

.naver-btn:hover {
    background: #02b350;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(3, 199, 90, 0.3);
}

.kakao-btn {
    background: #FEE500;
    color: #000000;
}

.kakao-btn:hover {
    background: #f5dc00;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(254, 229, 0, 0.3);
}

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

.copy-btn:hover {
    background: var(--primary-blue-dark);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
}

.map-container {
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    height: 400px;
}

.map-placeholder {
    width: 100%;
    height: 100%;
}

.map-placeholder iframe {
    width: 100%;
    height: 100%;
}

.contact-form-container {
    background: var(--bg-white);
    padding: var(--spacing-2xl);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
}

.contact-form-container h3 {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: var(--spacing-lg);
    text-align: center;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
}

.form-group {
    position: relative;
    margin-bottom: var(--spacing-lg);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 1rem;
    border: 2px solid var(--bg-gray);
    border-radius: var(--radius-md);
    font-family: inherit;
    font-size: 1rem;
    transition: all var(--transition-base);
    background: var(--bg-light);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-blue);
    background: var(--bg-white);
}

.form-group label {
    position: absolute;
    left: 1rem;
    top: 1rem;
    color: var(--text-gray);
    transition: all var(--transition-base);
    pointer-events: none;
}

.form-group input:focus + label,
.form-group input:not(:placeholder-shown) + label,
.form-group textarea:focus + label,
.form-group textarea:not(:placeholder-shown) + label {
    top: -0.75rem;
    left: 0.75rem;
    font-size: 0.875rem;
    background: var(--bg-white);
    padding: 0 0.5rem;
    color: var(--primary-blue);
}

/* Footer */
.footer {
    background: var(--text-dark);
    color: white;
    padding: var(--spacing-2xl) 0 var(--spacing-md);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.footer-section h4 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
}

.footer-section p {
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 0.5rem;
}

.footer-section a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: all var(--transition-base);
}

.footer-section a:hover {
    color: white;
}

.footer-established {
    color: var(--accent-cyan) !important;
    font-weight: 600;
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--spacing-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-bottom p {
    color: rgba(255, 255, 255, 0.5);
    margin: 0;
}

.footer-social {
    display: flex;
    gap: var(--spacing-md);
}

.footer-social a {
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    text-decoration: none;
    transition: all var(--transition-base);
}

.footer-social a:hover {
    background: var(--primary-blue);
    transform: translateY(-3px);
}

/* Scroll to Top */
.scroll-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--primary-blue), var(--accent-cyan));
    color: white;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
    z-index: 999;
}

.scroll-top.visible {
    opacity: 1;
    visibility: visible;
}

.scroll-top:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

/* Modal */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 9999;
    display: none;
}

.modal.active {
    display: block;
}

.modal-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(5px);
}

.modal-content {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: var(--bg-white);
    border-radius: var(--radius-xl);
    padding: var(--spacing-2xl);
    max-width: 600px;
    width: 90%;
    max-height: 80vh;
    overflow-y: auto;
    box-shadow: var(--shadow-2xl);
}

.modal-close {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    width: 40px;
    height: 40px;
    background: var(--bg-light);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    color: var(--text-dark);
    transition: all var(--transition-base);
}

.modal-close:hover {
    background: var(--primary-blue);
    color: white;
    transform: rotate(90deg);
}

.modal-body h2 {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: var(--spacing-lg);
}

.modal-body p {
    color: var(--text-gray);
    line-height: 1.8;
}

/* Success Message */
.success-message {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0);
    background: white;
    padding: var(--spacing-xl);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-2xl);
    text-align: center;
    z-index: 10000;
    transition: all var(--transition-base);
}

.success-message.show {
    transform: translate(-50%, -50%) scale(1);
}

.success-message i {
    font-size: 4rem;
    color: var(--secondary-green);
    margin-bottom: var(--spacing-md);
}

.success-message p {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-dark);
    margin: 0;
}

/* Responsive Design */
@media (max-width: 1024px) {
    .director-content {
        grid-template-columns: 1fr;
    }

    .director-image {
        max-width: 300px;
        margin: 0 auto;
        position: static;
    }

    .timeline::before {
        left: 0;
    }

    .timeline-item {
        flex-direction: column !important;
        align-items: flex-start;
    }

    .timeline-dot {
        left: 0;
        transform: none;
    }

    .timeline-content {
        width: 100%;
        margin-left: 40px !important;
        margin-right: 0 !important;
    }

    .org-chart {
        padding: var(--spacing-md);
    }

    .org-chart::before,
    .org-chart::after {
        display: none;
    }

    .org-top {
        flex-direction: column;
        gap: 1rem;
        margin-bottom: 2rem;
    }

    .org-top::before,
    .org-top::after {
        display: none;
    }

    .org-bottom {
        grid-template-columns: 1fr;
        gap: 1rem;
        margin-top: 0;
    }

    .org-bottom .org-department::before {
        display: none;
    }

    .org-node {
        min-width: 120px;
        padding: 1rem 1.25rem;
    }

    .org-director {
        min-width: 140px;
        padding: 1.25rem 1.5rem;
    }

    .org-icon {
        font-size: 1.5rem;
    }

    .org-node h4 {
        font-size: 0.9rem;
    }

    .org-sub-node {
        font-size: 0.75rem;
        padding: 0.4rem 0.6rem;
    }
}

@media (max-width: 768px) {
    .mobile-toggle {
        display: flex;
    }

    .nav-menu {
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background: var(--bg-white);
        flex-direction: column;
        padding: var(--spacing-md) 0;
        box-shadow: var(--shadow-lg);
        display: none;
    }

    .nav-menu.active {
        display: flex;
    }

    .contact-grid,
    .form-row {
        grid-template-columns: 1fr;
    }

    .map-action-buttons {
        flex-direction: column;
    }

    .map-action-btn {
        width: 100%;
    }

    .static-map-image {
        height: 300px !important;
    }

    .map-overlay {
        padding: var(--spacing-md) var(--spacing-lg);
    }

    .map-overlay i {
        font-size: 2rem;
        margin-bottom: var(--spacing-sm);
    }

    .map-overlay p {
        font-size: 1rem;
    }

    .research-grid,
    .members-grid,
    .about-grid {
        grid-template-columns: 1fr;
    }

    .tabs {
        flex-direction: column;
    }

    .footer-bottom {
        flex-direction: column;
        gap: var(--spacing-md);
        text-align: center;
    }

    /* Slider buttons for mobile */
    .slider-btn {
        width: 40px;
        height: 40px;
        font-size: 1rem;
    }

    .slider-btn-prev {
        left: 1rem;
    }

    .slider-btn-next {
        right: 1rem;
    }

    .slider-dots {
        bottom: 2rem;
        gap: 0.75rem;
    }

    .slider-dot {
        width: 10px;
        height: 10px;
    }

    .slider-dot.active {
        width: 24px;
    }
}

/* ================================
   Regulations Section & Accordion
   ================================ */

.regulations-section {
    padding: var(--spacing-8xl) 0;
    background: var(--bg-light);
}

.accordion {
    max-width: 900px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.accordion-item {
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    border: 2px solid var(--border-color);
    overflow: hidden;
    transition: all var(--transition-normal);
}

.accordion-item:hover {
    border-color: var(--primary-blue-light);
    box-shadow: var(--shadow-lg);
}

.accordion-header {
    width: 100%;
    padding: var(--spacing-lg) var(--spacing-xl);
    background: transparent;
    border: none;
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    cursor: pointer;
    transition: all var(--transition-normal);
    text-align: left;
}

.accordion-header:hover {
    background: var(--bg-light);
}

.accordion-item.active .accordion-header {
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--primary-blue-light) 100%);
    color: white;
}

.accordion-number {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary-blue);
    background: linear-gradient(135deg, var(--primary-blue-light) 0%, var(--accent-cyan) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    min-width: 60px;
}

.accordion-item.active .accordion-number {
    background: white;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.accordion-title {
    flex: 1;
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
}

.accordion-item.active .accordion-title {
    color: white;
}

.accordion-icon {
    font-size: 1.25rem;
    color: var(--primary-blue);
    transition: transform var(--transition-normal);
}

.accordion-item.active .accordion-icon {
    transform: rotate(180deg);
    color: white;
}

.accordion-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.accordion-item.active .accordion-content {
    max-height: 5000px;
}

.accordion-content > div:first-child {
    padding: var(--spacing-xl);
    border-top: 1px solid var(--border-color);
}

.regulation-article {
    margin-bottom: var(--spacing-lg);
    padding: var(--spacing-md);
    background: var(--bg-light);
    border-radius: var(--radius-md);
    border-left: 4px solid var(--primary-blue-light);
}

.regulation-article:last-child {
    margin-bottom: 0;
}

.regulation-article h4 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--primary-blue);
    margin-bottom: var(--spacing-sm);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.regulation-article h4::before {
    content: "📋";
    font-size: 1rem;
}

.regulation-article p {
    color: var(--text-primary);
    line-height: 1.8;
    margin: 0;
}

.regulation-article ul {
    list-style: none;
    padding: 0;
    margin: var(--spacing-sm) 0 0 0;
}

.regulation-article ul li {
    color: var(--text-primary);
    line-height: 1.8;
    margin-bottom: var(--spacing-sm);
    padding-left: var(--spacing-md);
    position: relative;
}

.regulation-article ul li::before {
    content: "•";
    color: var(--primary-blue-light);
    font-weight: bold;
    position: absolute;
    left: 0;
}

.regulation-article ul li:last-child {
    margin-bottom: 0;
}

/* Dark mode for regulations */
[data-theme="dark"] .regulations-section {
    background: var(--bg-secondary);
}

[data-theme="dark"] .accordion-item {
    background: var(--bg-primary);
    border-color: rgba(59, 130, 246, 0.2);
}

[data-theme="dark"] .accordion-item:hover {
    border-color: var(--primary-blue-light);
}

[data-theme="dark"] .accordion-header:hover {
    background: var(--bg-secondary);
}

[data-theme="dark"] .regulation-article {
    background: var(--bg-secondary);
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }

    .hero-subtitle {
        font-size: 1.25rem;
    }

    .stats-grid {
        grid-template-columns: 1fr;
    }

    .accordion-header {
        padding: var(--spacing-md);
    }

    .accordion-number {
        font-size: 1rem;
        min-width: 50px;
    }

    .accordion-title {
        font-size: 1rem;
    }

    .accordion-content > div:first-child {
        padding: var(--spacing-md);
    }

    .regulation-article {
        padding: var(--spacing-sm);
    }

    .regulation-article h4 {
        font-size: 0.95rem;
    }
}

/* ========================================
   Director Profile Accordion
   ======================================== */

.member-card-wrapper {
    width: 100%;
}

.director-wrapper {
    grid-column: 1 / -1;
}

.member-card.director {
    position: relative;
}

.director-more-btn,
.member-more-btn {
    display: none;
    margin-top: var(--spacing-md);
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--primary-blue);
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 0.9rem;
    transition: all 0.3s ease;
    width: 100%;
}

.director-more-btn i,
.member-more-btn i {
    transition: transform 0.3s ease;
}

.director-more-btn:hover,
.member-more-btn:hover {
    background: var(--primary-blue-dark);
}

.member-card.director:hover .director-more-btn,
.member-card:hover .member-more-btn {
    display: block;
}

.director-details,
.member-details {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.5s ease;
    background: var(--bg-secondary);
    border-radius: 0 0 12px 12px;
    margin-top: -12px;
    padding-top: 12px;
}

.director-details.active,
.member-details.active {
    max-height: 3000px;
}

.director-accordion,
.member-accordion {
    border-bottom: 1px solid var(--border-color);
}

.director-accordion:last-child,
.member-accordion:last-child {
    border-bottom: none;
}

.director-accordion-header,
.member-accordion-header {
    width: 100%;
    padding: var(--spacing-md) var(--spacing-lg);
    background: transparent;
    border: none;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-primary);
    transition: all 0.3s ease;
}

.director-accordion-header:hover,
.member-accordion-header:hover {
    background: rgba(37, 99, 235, 0.05);
}

.director-accordion-header span,
.member-accordion-header span {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.director-accordion-header i:last-child,
.member-accordion-header i:last-child {
    transition: transform 0.3s ease;
}

.director-accordion.active .director-accordion-header i:last-child,
.member-accordion.active .member-accordion-header i:last-child {
    transform: rotate(180deg);
}

.director-accordion-content,
.member-accordion-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease;
}

.director-accordion.active .director-accordion-content,
.member-accordion.active .member-accordion-content {
    max-height: 3000px;
    padding: var(--spacing-md) var(--spacing-lg);
}

/* Career List */
.career-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.career-item {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    padding: var(--spacing-sm);
    background: white;
    border-radius: 6px;
    border-left: 3px solid var(--primary-blue);
}

.career-period {
    font-weight: 600;
    color: var(--primary-blue);
    min-width: 90px;
    font-size: 0.85rem;
    flex-shrink: 0;
}

.career-title {
    color: var(--text-primary);
    line-height: 1.5;
    font-size: 0.9rem;
}

/* Simple List */
.simple-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.simple-list li {
    padding: var(--spacing-sm) var(--spacing-md);
    background: white;
    border-radius: 6px;
    line-height: 1.6;
    font-size: 0.9rem;
    color: var(--text-primary);
}

/* Research Summary */
.research-summary {
    background: rgba(37, 99, 235, 0.05);
    padding: var(--spacing-md);
    border-radius: 8px;
    margin-bottom: var(--spacing-md);
    border-left: 3px solid var(--primary-blue);
}

.research-summary p {
    margin: 0 0 var(--spacing-xs) 0;
    line-height: 1.6;
    font-size: 0.9rem;
    color: var(--text-primary);
}

.research-summary p:last-child {
    margin-bottom: 0;
}

/* Dark mode */
[data-theme="dark"] .director-details,
[data-theme="dark"] .member-details {
    background: var(--bg-primary);
}

[data-theme="dark"] .director-accordion,
[data-theme="dark"] .member-accordion {
    border-color: rgba(59, 130, 246, 0.2);
}

[data-theme="dark"] .career-item,
[data-theme="dark"] .simple-list li {
    background: var(--bg-secondary);
}

[data-theme="dark"] .research-summary {
    background: rgba(59, 130, 246, 0.15);
}

/* Responsive */
@media (max-width: 768px) {
    .career-item {
        flex-direction: column;
        gap: var(--spacing-xs);
    }

    .career-period {
        min-width: auto;
    }

    .director-accordion-header {
        padding: var(--spacing-sm) var(--spacing-md);
        font-size: 0.9rem;
    }

    .director-accordion.active .director-accordion-content {
        padding: var(--spacing-sm) var(--spacing-md);
    }
}