/* ============================================
   HI-ABC Website - Main Stylesheet
   첨단바이오융합연구소 (Advanced Bio-Convergence Institute)
   ============================================ */

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* ============================================
   CSS Variables & Theme
   ============================================ */
:root {
    --color-primary: #0a2850;
    --color-primary-light: #1450b6;
    --color-primary-dark: #051a33;
    --color-secondary: #5014a8;
    --color-accent: #00bcd4;
    --color-accent-light: #2db887;
    --color-text: #333333;
    --color-text-light: #666666;
    --color-text-lighter: #999999;
    --color-bg: #ffffff;
    --color-bg-light: #f5f7fa;
    --color-bg-dark: #1a1a1a;
    --color-border: #e0e0e0;
    --color-border-light: #f0f0f0;
    --color-shadow: rgba(0, 0, 0, 0.1);
    --color-shadow-dark: rgba(0, 0, 0, 0.2);

    --font-family: 'Noto Sans KR', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-weight-light: 300;
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    --font-weight-extrabold: 900;

    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    --spacing-3xl: 6rem;

    --border-radius-sm: 0.5rem;
    --border-radius-md: 1rem;
    --border-radius-lg: 1.5rem;
    --border-radius-xl: 2rem;

    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;

    --shadow-sm: 0 1px 3px var(--color-shadow);
    --shadow-md: 0 4px 12px var(--color-shadow);
    --shadow-lg: 0 12px 32px var(--color-shadow-dark);
    --shadow-xl: 0 20px 48px rgba(0, 0, 0, 0.15);
}

/* ============================================
   Base Styles
   ============================================ */
html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: 16px;
    font-weight: var(--font-weight-normal);
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-bg);
    overflow-x: hidden;
}

a {
    color: var(--color-primary-light);
    text-decoration: none;
    transition: color var(--transition-normal);
}

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

img {
    max-width: 100%;
    height: auto;
}

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

/* ============================================
   Navigation Bar
   ============================================ */
.navbar-main {
    position: sticky;
    top: 0;
    z-index: 1000;
    background-color: rgba(255, 255, 255, 0.97);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    box-shadow: 0 1px 0 rgba(0,0,0,0.06);
    transition: box-shadow var(--transition-normal);
}

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

.navbar-main .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}

.navbar-brand {
    flex-shrink: 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    transition: transform var(--transition-normal);
}

.logo:hover {
    transform: translateY(-1px);
}

.logo-icon {
    flex-shrink: 0;
}

.logo-text-group {
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 0;
    border-left: 1.5px solid var(--color-border);
    padding-left: 0.75rem;
    margin-left: 0.15rem;
    height: 44px;
}

.logo-text {
    font-size: 14px;
    font-weight: var(--font-weight-semibold);
    color: var(--color-primary);
    letter-spacing: 1.5px;
    line-height: 1.3;
}

.logo-subtitle {
    font-size: 9px;
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-lighter);
    letter-spacing: 2px;
    text-transform: uppercase;
    line-height: 1.2;
    margin-bottom: 2px;
    padding-bottom: 3px;
    border-bottom: 0.5px solid var(--color-border-light);
}

.navbar-menu {
    display: flex;
    list-style: none;
    gap: 0;
    margin: 0;
    padding: 0;
}

.nav-item {
    position: relative;
}

.nav-link {
    display: block;
    padding: var(--spacing-sm) 1.1rem;
    font-weight: var(--font-weight-medium);
    font-size: 15px;
    color: var(--color-text);
    transition: color var(--transition-normal);
    position: relative;
}

.nav-link:after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--color-primary-light), var(--color-accent));
    transform: translateX(-50%);
    transition: width var(--transition-normal);
}

.nav-link:hover {
    color: var(--color-primary-light);
}

.nav-link:hover:after,
.nav-link:focus:after {
    width: 70%;
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    background-color: var(--color-bg);
    border: 1px solid var(--color-border-light);
    border-radius: var(--border-radius-sm);
    min-width: 180px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: all var(--transition-normal);
    list-style: none;
    box-shadow: var(--shadow-lg);
    margin-top: 0;
    overflow: hidden;
}

.nav-item:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-menu li {
    border-bottom: 1px solid var(--color-border-light);
}

.dropdown-menu li:last-child {
    border-bottom: none;
}

.dropdown-menu a {
    display: block;
    padding: 0.75rem 1.2rem;
    color: var(--color-text);
    font-size: 14px;
    transition: all var(--transition-fast);
}

.dropdown-menu a:hover {
    background-color: var(--color-bg-light);
    color: var(--color-primary-light);
    padding-left: 1.5rem;
}

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

.navbar-toggle span {
    width: 24px;
    height: 2.5px;
    background-color: var(--color-primary);
    border-radius: 2px;
    transition: all var(--transition-normal);
}

.navbar-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

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

.navbar-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* ============================================
   Hero Slider - with Background Images
   ============================================ */
.hero-slider {
    position: relative;
    width: 100%;
    height: 100vh;
    min-height: 600px;
    overflow: hidden;
}

.hero-slide {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    opacity: 0;
    transition: opacity 1s ease-in-out;
    display: flex;
    align-items: center;
    justify-content: center;
}

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

.hero-bg-image {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    background-size: cover;
    background-position: center;
    transition: transform 8s ease-out;
}

.hero-slide.active .hero-bg-image {
    transform: scale(1.05);
}

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

.hero-overlay-blue {
    background: linear-gradient(135deg, rgba(5, 26, 51, 0.82) 0%, rgba(20, 80, 182, 0.65) 50%, rgba(0, 188, 212, 0.45) 100%);
}

.hero-overlay-purple {
    background: linear-gradient(135deg, rgba(30, 10, 60, 0.82) 0%, rgba(80, 20, 168, 0.65) 50%, rgba(20, 80, 182, 0.45) 100%);
}

.hero-overlay-teal {
    background: linear-gradient(135deg, rgba(5, 26, 51, 0.82) 0%, rgba(0, 100, 80, 0.65) 50%, rgba(0, 188, 212, 0.45) 100%);
}

.hero-content {
    text-align: center;
    color: white;
    z-index: 2;
    padding: 0 var(--spacing-lg);
    max-width: 900px;
}

.hero-tag {
    display: inline-block;
    font-size: 0.85rem;
    font-weight: var(--font-weight-medium);
    letter-spacing: 2px;
    text-transform: uppercase;
    color: var(--color-accent);
    margin-bottom: 1.5rem;
    padding: 6px 20px;
    border: 1px solid rgba(0, 188, 212, 0.4);
    border-radius: 30px;
    backdrop-filter: blur(4px);
}

.hero-title {
    font-size: 3.2rem;
    font-weight: var(--font-weight-bold);
    margin-bottom: 1.2rem;
    line-height: 1.25;
    text-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
    letter-spacing: -0.5px;
}

.hero-subtitle {
    font-size: 1.15rem;
    font-weight: var(--font-weight-light);
    margin-bottom: var(--spacing-lg);
    opacity: 0.9;
    line-height: 1.6;
}

.slider-controls {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 10px;
    z-index: 100;
}

.slider-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background-color: rgba(255, 255, 255, 0.3);
    border: 2px solid rgba(255, 255, 255, 0.6);
    cursor: pointer;
    transition: all var(--transition-normal);
}

.slider-dot:hover {
    background-color: rgba(255, 255, 255, 0.5);
}

.slider-dot.active {
    background-color: white;
    width: 36px;
    border-radius: 6px;
    border-color: white;
}

.scroll-indicator {
    position: absolute;
    bottom: 40px;
    right: 40px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    z-index: 100;
    color: rgba(255, 255, 255, 0.6);
    font-size: 10px;
    letter-spacing: 2px;
}

.scroll-line {
    width: 1px;
    height: 40px;
    background: linear-gradient(to bottom, rgba(255,255,255,0.6), transparent);
    animation: scrollPulse 2s ease-in-out infinite;
}

@keyframes scrollPulse {
    0%, 100% { opacity: 0.3; transform: scaleY(1); }
    50% { opacity: 1; transform: scaleY(1.2); }
}

/* ============================================
   Buttons
   ============================================ */
.btn {
    display: inline-block;
    padding: 0.75rem 1.75rem;
    border-radius: var(--border-radius-sm);
    font-weight: var(--font-weight-medium);
    text-decoration: none;
    cursor: pointer;
    border: none;
    transition: all var(--transition-normal);
    font-family: var(--font-family);
    font-size: 15px;
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-primary-light), var(--color-primary));
    color: white;
    border: 2px solid transparent;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(20, 80, 182, 0.35);
    color: white;
}

.btn-secondary {
    background-color: var(--color-primary);
    color: white;
    border: 2px solid var(--color-primary);
}

.btn-secondary:hover {
    background-color: var(--color-primary-dark);
    border-color: var(--color-primary-dark);
    color: white;
    transform: translateY(-2px);
}

.btn-outline {
    background: transparent;
    color: var(--color-primary-light);
    border: 2px solid var(--color-primary-light);
}

.btn-outline:hover {
    background: var(--color-primary-light);
    color: white;
    transform: translateY(-2px);
}

.btn-outline-white {
    background: transparent;
    color: white;
    border: 2px solid rgba(255, 255, 255, 0.6);
}

.btn-outline-white:hover {
    background: rgba(255, 255, 255, 0.15);
    color: white;
    border-color: white;
    transform: translateY(-2px);
}

.btn-hero {
    padding: 14px 32px;
    font-size: 16px;
    border-radius: var(--border-radius-sm);
}

/* ============================================
   Section Styles
   ============================================ */
.section {
    padding: var(--spacing-3xl) 0;
    position: relative;
}

.section-title {
    font-size: 2.2rem;
    font-weight: var(--font-weight-bold);
    text-align: center;
    margin-bottom: 1rem;
    color: var(--color-primary);
    position: relative;
    letter-spacing: -0.5px;
}

.section-title:after {
    content: '';
    display: block;
    width: 60px;
    height: 3px;
    background: linear-gradient(90deg, var(--color-primary-light), var(--color-accent));
    border-radius: 2px;
    margin: 1rem auto 0;
}

.section-title-left {
    text-align: left;
}

.section-title-left:after {
    margin: 1rem 0 0 0;
}

.section-title-white {
    color: white;
}

.section-title-white:after {
    background: linear-gradient(90deg, rgba(255,255,255,0.8), var(--color-accent));
}

.section-desc {
    text-align: center;
    color: var(--color-text-light);
    font-size: 1.05rem;
    max-width: 700px;
    margin: 0 auto var(--spacing-2xl);
    line-height: 1.7;
}

.section-cta {
    text-align: center;
    margin-top: var(--spacing-lg);
}

/* ============================================
   About Section - with Image
   ============================================ */
.section-about {
    background-color: white;
}

.about-content-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-2xl);
    align-items: center;
    margin-bottom: var(--spacing-3xl);
}

.about-image-wrapper {
    position: relative;
    border-radius: var(--border-radius-lg);
    overflow: hidden;
}

.about-main-image {
    width: 100%;
    height: 400px;
    object-fit: cover;
    border-radius: var(--border-radius-lg);
    transition: transform 0.6s ease;
}

.about-image-wrapper:hover .about-main-image {
    transform: scale(1.03);
}

.about-image-accent {
    position: absolute;
    bottom: -15px;
    right: -15px;
    width: 120px;
    height: 120px;
    border: 4px solid var(--color-accent);
    border-radius: var(--border-radius-lg);
    z-index: -1;
}

.intro-text {
    font-size: 1.05rem;
    line-height: 1.8;
    color: var(--color-text);
}

.intro-text-left {
    text-align: left;
}

.intro-text strong {
    color: var(--color-primary);
}

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

.stat-card {
    background-color: white;
    border-radius: var(--border-radius-md);
    padding: var(--spacing-lg) var(--spacing-md);
    text-align: center;
    box-shadow: 0 2px 12px rgba(0,0,0,0.06);
    transition: all var(--transition-normal);
    border-bottom: 3px solid transparent;
}

.stat-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-bottom-color: var(--color-primary-light);
}

.stat-icon {
    margin-bottom: 0.75rem;
}

.stat-number {
    font-size: 2.8rem;
    font-weight: var(--font-weight-bold);
    color: var(--color-primary);
    display: inline;
}

.stat-unit {
    font-size: 1.2rem;
    color: var(--color-accent);
    font-weight: var(--font-weight-semibold);
}

.stat-label {
    font-size: 0.9rem;
    color: var(--color-text-light);
    margin-top: 0.5rem;
    font-weight: var(--font-weight-medium);
}

/* ============================================
   Research Areas - Image Cards
   ============================================ */
.section-research-areas {
    background-color: var(--color-bg-light);
}

.research-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
}

.research-card {
    background: white;
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    transition: all 0.4s ease;
    box-shadow: 0 2px 12px rgba(0,0,0,0.06);
}

.research-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 16px 40px rgba(0,0,0,0.12);
}

.research-card-image {
    position: relative;
    height: 200px;
    overflow: hidden;
}

.research-card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s ease;
}

.research-card:hover .research-card-image img {
    transform: scale(1.08);
}

.research-card-image-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 60%;
    background: linear-gradient(to top, rgba(0,0,0,0.3), transparent);
}

.research-card-body {
    padding: 1.75rem;
}

.research-card-icon {
    margin-bottom: 1rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 56px;
    height: 56px;
    border-radius: 14px;
    background: var(--color-bg-light);
}

.research-card-body h3 {
    font-size: 1.25rem;
    color: var(--color-primary);
    margin-bottom: 0.75rem;
    font-weight: var(--font-weight-semibold);
}

.research-card-body p {
    color: var(--color-text-light);
    line-height: 1.7;
    font-size: 0.93rem;
    margin-bottom: 1rem;
}

.research-card-link {
    color: var(--color-primary-light);
    font-weight: var(--font-weight-medium);
    font-size: 0.9rem;
    transition: color var(--transition-normal);
    cursor: pointer;
}

.research-card:hover .research-card-link {
    color: var(--color-accent);
}

/* ============================================
   Publications Section
   ============================================ */
.section-publications {
    background: white;
}

.publications-table-wrapper {
    overflow-x: auto;
    margin-bottom: var(--spacing-lg);
    border-radius: var(--border-radius-md);
    box-shadow: 0 2px 12px rgba(0,0,0,0.06);
}

.publications-table {
    width: 100%;
    border-collapse: collapse;
    background-color: white;
}

.publications-table thead {
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
    color: white;
}

.publications-table th {
    padding: 1rem 1.25rem;
    text-align: left;
    font-weight: var(--font-weight-semibold);
    font-size: 0.9rem;
    letter-spacing: 0.3px;
}

.publications-table td {
    padding: 1rem 1.25rem;
    border-bottom: 1px solid var(--color-border-light);
    font-size: 0.93rem;
    vertical-align: top;
}

.publications-table tbody tr {
    transition: background-color var(--transition-normal);
}

.publications-table tbody tr:hover {
    background-color: rgba(20, 80, 182, 0.03);
}

.impact-factor {
    display: inline-block;
    background: linear-gradient(135deg, var(--color-primary-light), var(--color-secondary));
    color: white;
    padding: 2px 10px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: var(--font-weight-semibold);
    margin-top: 4px;
}

.year-badge {
    display: inline-block;
    background: var(--color-bg-light);
    color: var(--color-primary);
    padding: 4px 12px;
    border-radius: 20px;
    font-weight: var(--font-weight-semibold);
    font-size: 0.85rem;
}

.text-muted {
    color: var(--color-text-lighter);
    font-size: 0.8rem;
}

/* ============================================
   Activities Section - Image Cards
   ============================================ */
.section-activities {
    background-color: var(--color-bg-light);
}

.activities-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
}

.activity-card {
    background: white;
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    transition: all 0.4s ease;
    box-shadow: 0 2px 12px rgba(0,0,0,0.06);
}

.activity-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 16px 40px rgba(0,0,0,0.12);
}

.activity-card-image {
    position: relative;
    height: 180px;
    overflow: hidden;
}

.activity-card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s ease;
}

.activity-card:hover .activity-card-image img {
    transform: scale(1.08);
}

.activity-card-badge {
    position: absolute;
    top: 12px;
    left: 12px;
    background: linear-gradient(135deg, var(--color-primary-light), var(--color-secondary));
    color: white;
    padding: 4px 14px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: var(--font-weight-semibold);
    z-index: 2;
}

.activity-card-body {
    padding: 1.5rem;
}

.activity-date-tag {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--color-primary-light);
    font-size: 0.85rem;
    font-weight: var(--font-weight-medium);
    margin-bottom: 0.75rem;
}

.activity-card-body h3 {
    font-size: 1.15rem;
    color: var(--color-primary);
    margin-bottom: 0.5rem;
    font-weight: var(--font-weight-semibold);
    line-height: 1.4;
}

.activity-card-body p {
    color: var(--color-text-light);
    margin-bottom: 1rem;
    font-size: 0.9rem;
    line-height: 1.6;
}

.activity-link {
    display: inline-block;
    color: var(--color-primary-light);
    font-weight: var(--font-weight-medium);
    font-size: 0.9rem;
    transition: all var(--transition-normal);
}

.activity-link:hover {
    color: var(--color-accent);
}

/* ============================================
   Timeline Section - with Background Image
   ============================================ */
.section-timeline {
    position: relative;
    overflow: hidden;
    padding: var(--spacing-3xl) 0;
}

.timeline-bg-image {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
}

.timeline-bg-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(5, 26, 51, 0.92) 0%, rgba(10, 40, 80, 0.88) 100%);
}

.timeline {
    position: relative;
    padding: var(--spacing-xl) 0;
}

.timeline:before {
    content: '';
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    width: 2px;
    height: 100%;
    background: linear-gradient(180deg, var(--color-accent), var(--color-primary-light), var(--color-secondary));
}

.timeline-item {
    margin-bottom: var(--spacing-xl);
    position: relative;
    width: 45%;
}

.timeline-item:nth-child(odd) {
    margin-left: 0;
    text-align: right;
    padding-right: var(--spacing-lg);
}

.timeline-item:nth-child(even) {
    margin-left: 55%;
    text-align: left;
    padding-left: var(--spacing-lg);
}

.timeline-date {
    font-size: 1.1rem;
    font-weight: var(--font-weight-bold);
    color: var(--color-accent);
    margin-bottom: var(--spacing-xs);
}

.timeline-content {
    background: rgba(255, 255, 255, 0.08);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    padding: 1.25rem;
    border-radius: var(--border-radius-md);
    border: 1px solid rgba(255, 255, 255, 0.12);
    transition: all var(--transition-normal);
}

.timeline-content:hover {
    background: rgba(255, 255, 255, 0.14);
    transform: translateY(-3px);
}

.timeline-content h4 {
    font-size: 1.05rem;
    color: white;
    margin-bottom: 0.5rem;
    font-weight: var(--font-weight-semibold);
}

.timeline-content p {
    color: rgba(255, 255, 255, 0.75);
    font-size: 0.9rem;
    line-height: 1.6;
}

.timeline-item:before {
    content: '';
    position: absolute;
    top: 8px;
    width: 16px;
    height: 16px;
    background: var(--color-accent);
    border: 3px solid var(--color-primary);
    border-radius: 50%;
    transition: all var(--transition-normal);
    z-index: 2;
}

.timeline-item:nth-child(odd):before {
    right: -39px;
}

.timeline-item:nth-child(even):before {
    left: -39px;
}

.timeline-item:hover:before {
    background: white;
    transform: scale(1.3);
    box-shadow: 0 0 20px rgba(0, 188, 212, 0.5);
}

/* ============================================
   Directors Section
   ============================================ */
.section-directors {
    position: relative;
    padding: var(--spacing-3xl) 0;
    overflow: hidden;
}

.directors-bg-image {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    z-index: 0;
}

.directors-bg-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(10, 40, 80, 0.85) 0%, rgba(84, 20, 168, 0.75) 100%);
    z-index: 1;
}

.section-directors .section-title-white {
    color: white;
    margin-bottom: var(--spacing-2xl);
}

/* Current Director - Large Card */
.current-director-card {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-2xl);
    align-items: center;
    background: rgba(255, 255, 255, 0.08);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    padding: var(--spacing-2xl);
    border-radius: var(--border-radius-xl);
    border: 1px solid rgba(255, 255, 255, 0.15);
    margin-bottom: var(--spacing-3xl);
    transition: all var(--transition-normal);
}

.current-director-card:hover {
    background: rgba(255, 255, 255, 0.12);
    border-color: rgba(255, 255, 255, 0.25);
    transform: translateY(-5px);
}

.director-card-image {
    position: relative;
    overflow: hidden;
    border-radius: var(--border-radius-lg);
    aspect-ratio: 1;
}

.director-card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-normal);
}

.current-director-card:hover .director-card-image img {
    transform: scale(1.05);
}

.director-card-content {
    color: white;
}

.director-badge {
    display: inline-block;
    background: var(--color-accent);
    color: var(--color-primary);
    padding: 0.4rem 0.8rem;
    border-radius: var(--border-radius-sm);
    font-size: 0.75rem;
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--spacing-sm);
}

.director-name {
    font-size: 2.2rem;
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--spacing-xs);
}

.director-title {
    font-size: 0.95rem;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: var(--spacing-xs);
}

.director-period {
    font-size: 0.9rem;
    color: var(--color-accent);
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--spacing-md);
}

.director-divider {
    width: 40px;
    height: 2px;
    background: var(--color-accent);
    margin-bottom: var(--spacing-md);
}

.director-section-title {
    font-size: 0.85rem;
    font-weight: var(--font-weight-semibold);
    color: rgba(255, 255, 255, 0.7);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: var(--spacing-xs);
}

.director-research {
    font-size: 0.95rem;
    color: rgba(255, 255, 255, 0.9);
    line-height: 1.6;
}

/* Previous Directors - Grid */
.previous-directors-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-lg);
}

.director-card-small {
    background: rgba(255, 255, 255, 0.08);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-radius: var(--border-radius-lg);
    border: 1px solid rgba(255, 255, 255, 0.15);
    overflow: hidden;
    transition: all var(--transition-normal);
}

.director-card-small:hover {
    background: rgba(255, 255, 255, 0.14);
    border-color: rgba(255, 255, 255, 0.25);
    transform: translateY(-5px);
}

.director-card-small-image {
    position: relative;
    width: 100%;
    aspect-ratio: 1;
    overflow: hidden;
    background: rgba(0, 0, 0, 0.2);
}

.director-card-small-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-normal);
}

.director-card-small:hover .director-card-small-image img {
    transform: scale(1.1);
}

.director-card-small-content {
    padding: var(--spacing-md);
    color: white;
}

.director-badge-small {
    display: inline-block;
    background: var(--color-accent);
    color: var(--color-primary);
    padding: 0.25rem 0.6rem;
    border-radius: var(--border-radius-sm);
    font-size: 0.65rem;
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--spacing-xs);
}

.director-name-small {
    font-size: 1.1rem;
    font-weight: var(--font-weight-bold);
    margin-bottom: 0.25rem;
}

.director-info-small {
    font-size: 0.8rem;
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 0.25rem;
}

.director-period-small {
    font-size: 0.75rem;
    color: var(--color-accent);
    font-weight: var(--font-weight-semibold);
    margin-bottom: 0.5rem;
}

.director-research-small {
    font-size: 0.8rem;
    color: rgba(255, 255, 255, 0.85);
    line-height: 1.4;
}

/* ============================================
   CTA Banner Section
   ============================================ */
.section-cta-banner {
    position: relative;
    padding: var(--spacing-3xl) 0;
    overflow: hidden;
}

.cta-bg-image {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
}

.cta-bg-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(20, 80, 182, 0.9) 0%, rgba(80, 20, 168, 0.85) 100%);
}

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

.cta-banner-content h2 {
    font-size: 2rem;
    font-weight: var(--font-weight-bold);
    margin-bottom: 1rem;
    letter-spacing: -0.3px;
}

.cta-banner-content p {
    font-size: 1.05rem;
    opacity: 0.9;
    margin-bottom: 2rem;
}

.cta-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

/* ============================================
   Footer
   ============================================ */
.footer {
    background: linear-gradient(180deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: white;
    padding: var(--spacing-3xl) 0 var(--spacing-lg);
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 0.8fr 1fr;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.footer-column h4 {
    font-size: 0.95rem;
    margin-bottom: var(--spacing-md);
    font-weight: var(--font-weight-semibold);
    letter-spacing: 0.5px;
    text-transform: uppercase;
    color: rgba(255, 255, 255, 0.6);
}

.footer-about .logo-text {
    color: white;
    font-size: 16px;
}

.footer-about .logo-subtitle {
    color: rgba(255, 255, 255, 0.5);
    font-size: 12px;
}

.footer-logo {
    display: flex;
    flex-direction: column;
    gap: 4px;
    margin-bottom: 1rem;
}

.footer-description {
    font-size: 0.9rem;
    line-height: 1.7;
    opacity: 0.75;
}

.address {
    font-size: 0.9rem;
    line-height: 1.8;
    opacity: 0.8;
    margin-bottom: var(--spacing-sm);
}

.phone {
    font-size: 0.9rem;
    opacity: 0.8;
}

.footer-links ul {
    list-style: none;
}

.footer-links li {
    margin-bottom: 0.6rem;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.7);
    transition: all var(--transition-normal);
    font-size: 0.9rem;
}

.footer-links a:hover {
    color: white;
    padding-left: 4px;
}

.footer-ext-links {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-top: 0.5rem;
}

.footer-ext-links a {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.9rem;
    transition: all var(--transition-normal);
}

.footer-ext-links a:hover {
    color: var(--color-accent);
}

.footer-affiliation p {
    font-size: 0.9rem;
    margin-bottom: var(--spacing-sm);
    opacity: 0.8;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: var(--spacing-lg);
    text-align: center;
}

.copyright {
    font-size: 0.8rem;
    opacity: 0.5;
}

/* ============================================
   Sub-page Navigation (about, research, etc.)
   ============================================ */
.navbar {
    position: sticky;
    top: 0;
    z-index: 1000;
    background-color: rgba(255, 255, 255, 0.97);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    box-shadow: 0 1px 0 rgba(0,0,0,0.06);
    transition: box-shadow var(--transition-normal);
}

.navbar .navbar-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 72px;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.navbar .navbar-brand a {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    color: var(--color-primary);
    font-weight: var(--font-weight-bold);
    font-size: 16px;
    transition: transform var(--transition-normal);
}

.navbar .navbar-brand a:hover {
    transform: translateY(-1px);
    color: var(--color-primary);
}

.navbar .navbar-brand span {
    font-size: 15px;
    font-weight: var(--font-weight-bold);
    color: var(--color-primary);
}

.navbar .navbar-menu {
    display: flex;
    list-style: none;
    gap: 0;
    margin: 0;
    padding: 0;
}

.navbar .navbar-menu li a {
    display: block;
    padding: var(--spacing-sm) 1.1rem;
    font-weight: var(--font-weight-medium);
    font-size: 15px;
    color: var(--color-text);
    transition: color var(--transition-normal);
    position: relative;
}

.navbar .navbar-menu li a:hover,
.navbar .navbar-menu li a.active {
    color: var(--color-primary-light);
}

.navbar .navbar-menu li a.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 70%;
    height: 2px;
    background: linear-gradient(90deg, var(--color-primary-light), var(--color-accent));
    transform: translateX(-50%);
}

/* ============================================
   Breadcrumb
   ============================================ */
.breadcrumb {
    background-color: transparent;
    border-bottom: none;
    padding: 0.75rem 0;
    font-size: 0.85rem;
}

.breadcrumb-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.breadcrumb a {
    color: var(--color-text-lighter);
    transition: color var(--transition-normal);
}

.breadcrumb a:hover {
    color: var(--color-primary-light);
}

.breadcrumb .separator {
    color: var(--color-text-lighter);
    font-size: 0.75rem;
}

.breadcrumb .current {
    color: var(--color-primary);
    font-weight: var(--font-weight-medium);
}

/* ============================================
   Sub-page Hero Section
   ============================================ */
.hero-section {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 50%, var(--color-secondary) 100%);
    padding: var(--spacing-3xl) var(--spacing-md);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(0, 188, 212, 0.15) 0%, transparent 70%);
    border-radius: 50%;
}

.hero-section::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -10%;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(80, 20, 168, 0.15) 0%, transparent 70%);
    border-radius: 50%;
}

.hero-section .hero-content {
    position: relative;
    z-index: 2;
    max-width: 800px;
    margin: 0 auto;
}

.hero-section .hero-content h1 {
    font-size: 2.5rem;
    font-weight: var(--font-weight-bold);
    color: white;
    margin-bottom: 0.75rem;
    letter-spacing: -0.5px;
    text-shadow: 0 2px 20px rgba(0, 0, 0, 0.2);
}

.hero-section .hero-content p {
    font-size: 1.05rem;
    color: rgba(255, 255, 255, 0.85);
    font-weight: var(--font-weight-light);
}

.hero-breadcrumb {
    position: relative;
    z-index: 2;
    max-width: 1200px;
    margin: 0 auto var(--spacing-lg);
    padding: 0 var(--spacing-md);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.6);
}

.hero-breadcrumb a {
    color: rgba(255, 255, 255, 0.7);
    transition: color var(--transition-normal);
}

.hero-breadcrumb a:hover {
    color: white;
}

.hero-breadcrumb span {
    color: rgba(255, 255, 255, 0.5);
}

/* ============================================
   About Page Container & Section Styles
   ============================================ */
.about-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.about-container .section-header {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
}

.about-container .section-header h2 {
    font-size: 2rem;
    font-weight: var(--font-weight-bold);
    color: var(--color-primary);
    margin-bottom: 0.75rem;
    letter-spacing: -0.3px;
}

.about-container .header-line {
    width: 60px;
    height: 3px;
    background: linear-gradient(90deg, var(--color-primary-light), var(--color-accent));
    border-radius: 2px;
    margin: 0 auto;
}

/* ============================================
   Greeting Section
   ============================================ */
.greeting-section {
    padding: var(--spacing-3xl) 0;
    background: white;
}

.greeting-content {
    max-width: 800px;
    margin: 0 auto;
}

.director-greeting {
    margin-bottom: var(--spacing-xl);
}

.director-greeting p {
    font-size: 1.05rem;
    line-height: 1.9;
    color: var(--color-text);
    margin-bottom: 1rem;
}

.director-greeting p:first-child {
    font-size: 1.15rem;
    font-weight: var(--font-weight-medium);
    color: var(--color-primary);
}

.director-signature {
    text-align: right;
    padding-top: var(--spacing-lg);
}

.signature-line {
    width: 60px;
    height: 2px;
    background: linear-gradient(90deg, var(--color-primary-light), var(--color-accent));
    margin-left: auto;
    margin-bottom: var(--spacing-sm);
}

.director-signature .director-name {
    font-size: 0.9rem;
    color: var(--color-text-light);
    margin-bottom: 0.25rem;
    font-weight: var(--font-weight-normal);
}

.director-signature .director-title {
    font-size: 1.4rem;
    font-weight: var(--font-weight-bold);
    color: var(--color-primary);
}

/* ============================================
   Purpose Section
   ============================================ */
.purpose-section {
    padding: var(--spacing-3xl) 0;
    background-color: var(--color-bg-light);
}

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

.purpose-card {
    background: white;
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-xl) var(--spacing-lg);
    text-align: center;
    box-shadow: 0 2px 12px rgba(0,0,0,0.06);
    transition: all 0.4s ease;
    border-top: 3px solid transparent;
}

.purpose-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 16px 40px rgba(0,0,0,0.1);
    border-top-color: var(--color-primary-light);
}

.purpose-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 64px;
    height: 64px;
    border-radius: 16px;
    background: linear-gradient(135deg, rgba(20, 80, 182, 0.1), rgba(0, 188, 212, 0.1));
    margin-bottom: var(--spacing-md);
}

.purpose-icon svg {
    width: 32px;
    height: 32px;
    color: var(--color-primary-light);
}

.purpose-card h3 {
    font-size: 1.1rem;
    font-weight: var(--font-weight-semibold);
    color: var(--color-primary);
    margin-bottom: 0.75rem;
}

.purpose-card p {
    font-size: 0.93rem;
    color: var(--color-text-light);
    line-height: 1.7;
}

/* ============================================
   History / Timeline Section (About Page)
   ============================================ */
.history-section {
    padding: var(--spacing-3xl) 0;
    background: white;
}

.about-container .timeline {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
    padding-left: 40px;
}

.about-container .timeline::before {
    content: '';
    position: absolute;
    left: 8px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(180deg, var(--color-primary-light), var(--color-accent), var(--color-secondary));
}

.timeline-year {
    margin-bottom: var(--spacing-xl);
}

.timeline-year h3 {
    font-size: 1.5rem;
    font-weight: var(--font-weight-bold);
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
    position: relative;
    padding-left: 0;
}

.timeline-year h3::before {
    content: '';
    position: absolute;
    left: -40px;
    top: 50%;
    transform: translateY(-50%);
    width: 18px;
    height: 18px;
    background: var(--color-primary);
    border: 3px solid white;
    border-radius: 50%;
    box-shadow: 0 0 0 3px var(--color-primary-light);
    z-index: 2;
}

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

.about-container .timeline-item {
    position: relative;
    width: 100%;
    margin-left: 0;
    margin-bottom: 0;
    padding: 0;
    text-align: left;
}

.about-container .timeline-item::before {
    display: none;
}

.timeline-marker {
    position: absolute;
    left: -36px;
    top: 50%;
    transform: translateY(-50%);
    width: 10px;
    height: 10px;
    background: var(--color-accent);
    border: 2px solid white;
    border-radius: 50%;
    box-shadow: 0 0 0 2px var(--color-accent);
    z-index: 2;
    transition: all var(--transition-normal);
}

.about-container .timeline-item:hover .timeline-marker {
    transform: translateY(-50%) scale(1.4);
    background: var(--color-primary-light);
    box-shadow: 0 0 0 3px var(--color-primary-light), 0 0 12px rgba(20, 80, 182, 0.3);
}

.about-container .timeline-content {
    display: flex;
    align-items: baseline;
    gap: var(--spacing-sm);
    background: var(--color-bg-light);
    padding: 0.85rem 1.25rem;
    border-radius: var(--border-radius-sm);
    border: 1px solid var(--color-border-light);
    transition: all var(--transition-normal);
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
}

.about-container .timeline-content:hover {
    background: white;
    box-shadow: 0 4px 16px rgba(0,0,0,0.08);
    transform: translateX(4px);
}

.about-container .timeline-content .timeline-date {
    font-size: 0.85rem;
    font-weight: var(--font-weight-semibold);
    color: var(--color-primary-light);
    white-space: nowrap;
    min-width: 90px;
}

.about-container .timeline-content p {
    font-size: 0.95rem;
    color: var(--color-text);
    line-height: 1.5;
    margin: 0;
}

/* ============================================
   Organization Chart
   ============================================ */
.organization-section {
    padding: var(--spacing-3xl) 0;
    background-color: var(--color-bg-light);
}

.org-chart {
    max-width: 900px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0;
}

.org-level-1,
.org-level-2,
.org-level-3,
.org-level-4 {
    display: flex;
    justify-content: center;
    gap: var(--spacing-lg);
    width: 100%;
}

.org-box {
    background: white;
    border-radius: var(--border-radius-md);
    padding: var(--spacing-md) var(--spacing-lg);
    text-align: center;
    box-shadow: 0 2px 12px rgba(0,0,0,0.06);
    transition: all var(--transition-normal);
    border-top: 3px solid transparent;
    min-width: 160px;
}

.org-box:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(0,0,0,0.1);
}

.org-box.director {
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
    color: white;
    border-top: none;
    min-width: 200px;
    padding: var(--spacing-lg) var(--spacing-xl);
}

.org-box.director .org-title {
    color: white;
    font-size: 1.2rem;
}

.org-director-name {
    color: rgba(255, 255, 255, 0.9);
    font-size: 1rem;
    font-weight: var(--font-weight-medium);
    margin-top: 0.25rem;
}

.org-box.committee {
    border-top-color: var(--color-primary-light);
    flex: 1.2;
}

.org-box.secretary {
    border-top-color: var(--color-accent);
    flex: 0.6;
}

.org-box.researcher {
    border-top-color: var(--color-secondary);
    flex: 0.8;
}

.org-box.participants {
    border-top-color: var(--color-accent-light);
    background: linear-gradient(135deg, rgba(0, 188, 212, 0.05), rgba(45, 184, 135, 0.05));
    min-width: 250px;
}

.org-title {
    font-size: 1rem;
    font-weight: var(--font-weight-bold);
    color: var(--color-primary);
    margin-bottom: 0.5rem;
}

.org-subtitle {
    font-size: 0.8rem;
    color: var(--color-text-lighter);
    margin-bottom: 0.75rem;
    font-weight: var(--font-weight-medium);
}

.org-members {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
    justify-content: center;
}

.org-members span {
    display: inline-block;
    background: var(--color-bg-light);
    color: var(--color-text);
    padding: 0.25rem 0.65rem;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: var(--font-weight-medium);
}

.org-count {
    font-size: 1.8rem;
    font-weight: var(--font-weight-bold);
    color: var(--color-accent);
    margin-top: 0.25rem;
}

/* Org Chart Connectors */
.org-connector-1,
.org-connector-2,
.org-connector-3 {
    width: 2px;
    height: 30px;
    background: linear-gradient(180deg, var(--color-primary-light), var(--color-accent));
    margin: 0 auto;
    position: relative;
}

.org-connector-1::after,
.org-connector-2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80%;
    max-width: 700px;
    height: 2px;
    background: linear-gradient(90deg, var(--color-primary-light), var(--color-accent));
}

.org-connector-3::after {
    display: none;
}

/* ============================================
   Sub-page Footer
   ============================================ */
.footer .footer-container {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1fr;
    gap: var(--spacing-xl);
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.footer .footer-section h4 {
    font-size: 0.95rem;
    margin-bottom: var(--spacing-md);
    font-weight: var(--font-weight-semibold);
    letter-spacing: 0.3px;
    color: rgba(255, 255, 255, 0.7);
}

.footer .footer-section p {
    font-size: 0.9rem;
    line-height: 1.7;
    opacity: 0.8;
    margin-bottom: 0.25rem;
}

.footer .footer-section .footer-address {
    margin-top: 0.5rem;
    font-size: 0.85rem;
    opacity: 0.6;
}

.footer .footer-section .footer-copyright {
    margin-top: var(--spacing-sm);
    font-size: 0.8rem;
    opacity: 0.5;
}

.footer .footer-section ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.footer .footer-section ul li {
    margin-bottom: 0.5rem;
}

.footer .footer-section ul li a {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.9rem;
    transition: all var(--transition-normal);
}

.footer .footer-section ul li a:hover {
    color: white;
    padding-left: 4px;
}

/* ============================================
   Sub-page Responsive
   ============================================ */
@media (max-width: 1024px) {
    .purpose-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .footer .footer-container {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    .navbar .navbar-container {
        height: 60px;
    }

    .navbar .navbar-menu {
        display: none;
    }

    .hero-section .hero-content h1 {
        font-size: 1.8rem;
    }

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

    .about-container .timeline {
        padding-left: 30px;
    }

    .about-container .timeline::before {
        left: 4px;
    }

    .timeline-year h3::before {
        left: -30px;
        width: 14px;
        height: 14px;
    }

    .timeline-marker {
        left: -26px;
        width: 8px;
        height: 8px;
    }

    .about-container .timeline-content {
        flex-direction: column;
        gap: 0.25rem;
    }

    .org-level-2 {
        flex-direction: column;
        align-items: center;
    }

    .org-box.committee,
    .org-box.secretary,
    .org-box.researcher {
        max-width: 100%;
        width: 100%;
    }

    .org-connector-1::after,
    .org-connector-2::after {
        width: 60%;
    }

    .footer .footer-container {
        grid-template-columns: 1fr;
    }

    .about-container .section-header h2 {
        font-size: 1.6rem;
    }
}

@media (max-width: 480px) {
    .hero-section {
        padding: var(--spacing-2xl) var(--spacing-md);
    }

    .hero-section .hero-content h1 {
        font-size: 1.5rem;
    }

    .greeting-section {
        padding: var(--spacing-2xl) 0;
    }

    .purpose-section,
    .history-section,
    .organization-section {
        padding: var(--spacing-2xl) 0;
    }

    .org-box {
        min-width: auto;
        padding: var(--spacing-sm) var(--spacing-md);
    }

    .org-box.director {
        min-width: auto;
        padding: var(--spacing-md);
    }
}

/* ============================================
   Animation Classes
   ============================================ */
.animate-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.7s cubic-bezier(0.4, 0, 0.2, 1);
}

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

.animate-card {
    transition: all 0.4s ease;
}

/* ============================================
   Responsive Design
   ============================================ */
@media (max-width: 1024px) {
    .about-content-grid {
        gap: var(--spacing-xl);
    }

    .hero-title {
        font-size: 2.6rem;
    }

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

@media (max-width: 768px) {
    .navbar-main .container {
        height: 64px;
    }

    .navbar-toggle {
        display: flex;
    }

    .navbar-menu {
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        flex-direction: column;
        background-color: var(--color-bg);
        box-shadow: var(--shadow-lg);
        max-height: 0;
        overflow: hidden;
        transition: max-height var(--transition-normal);
        gap: 0;
    }

    .navbar-menu.active {
        max-height: 600px;
    }

    .nav-item {
        border-bottom: 1px solid var(--color-border-light);
    }

    .dropdown-menu {
        position: static;
        opacity: 0;
        visibility: hidden;
        transform: none;
        box-shadow: none;
        background-color: var(--color-bg-light);
        max-height: 0;
        overflow: hidden;
        transition: max-height var(--transition-normal);
        margin: 0;
        border: none;
        border-radius: 0;
    }

    .nav-item.active .dropdown-menu {
        opacity: 1;
        visibility: visible;
        max-height: 500px;
    }

    .hero-title {
        font-size: 2rem;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

    .hero-tag {
        font-size: 0.75rem;
    }

    .section-title {
        font-size: 1.8rem;
    }

    .about-content-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }

    .about-main-image {
        height: 280px;
    }

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }

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

    .timeline:before {
        left: 20px;
    }

    .timeline-item {
        width: 100%;
        margin-left: 0 !important;
        padding-left: 60px !important;
        text-align: left !important;
        padding-right: 0 !important;
    }

    .timeline-item:before {
        left: 12px !important;
        right: auto !important;
    }

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

    .publications-table {
        font-size: 0.85rem;
    }

    .publications-table th,
    .publications-table td {
        padding: 0.75rem;
    }

    .scroll-indicator {
        display: none;
    }

    .timeline-bg-image {
        background-attachment: scroll;
    }

    .current-director-card {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }

    .previous-directors-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-md);
    }
}

@media (max-width: 480px) {
    .logo-text {
        font-size: 14px;
    }

    .logo-icon svg {
        width: 28px;
        height: 28px;
    }

    .hero-title {
        font-size: 1.6rem;
    }

    .hero-subtitle {
        font-size: 0.9rem;
    }

    .btn-hero {
        padding: 12px 24px;
        font-size: 14px;
    }

    .section {
        padding: var(--spacing-2xl) 0;
    }

    .stats-grid {
        grid-template-columns: 1fr 1fr;
        gap: var(--spacing-sm);
    }

    .stat-card {
        padding: 1rem 0.75rem;
    }

    .stat-number {
        font-size: 2rem;
    }

    .section-title {
        font-size: 1.5rem;
    }

    .cta-banner-content h2 {
        font-size: 1.5rem;
    }

    .current-director-card {
        padding: var(--spacing-lg);
        margin-bottom: var(--spacing-2xl);
    }

    .director-name {
        font-size: 1.6rem;
    }

    .previous-directors-grid {
        grid-template-columns: 1fr;
    }
}

/* ============================================
   Print Styles
   ============================================ */
@media print {
    .navbar-main,
    .footer,
    .slider-controls,
    .scroll-indicator,
    .hero-slider,
    .section-cta-banner {
        display: none;
    }

    body {
        background: white;
    }

    .section {
        page-break-inside: avoid;
    }

    .animate-on-scroll {
        opacity: 1;
        transform: none;
    }
}