/* ===================================
   CSS RESET & BASE STYLES
   =================================== */

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

:root {
    /* Color Palette - Academic Green & Off-white */
    --primary-green: #2d5f3f;
    --primary-green-dark: #1f4430;
    --primary-green-light: #3a7350;
    --accent-gold: #b8945f;
    --accent-gold-light: #d4ad75;
    
    --off-white: #f9f7f4;
    --cream: #f4f1ed;
    --warm-white: #fdfcfa;
    
    --text-primary: #1a1a1a;
    --text-secondary: #4a4a4a;
    --text-muted: #6b6b6b;
    
    --border-light: #e4dfd7;
    --border-medium: #d0c9bd;
    --shadow-subtle: rgba(45, 95, 63, 0.08);
    --shadow-medium: rgba(45, 95, 63, 0.15);
    
    /* Typography */
    --font-serif: 'Crimson Pro', 'Georgia', serif;
    --font-sans: 'IBM Plex Sans', 'Helvetica Neue', sans-serif;
    
    --font-size-base: 18px;
    --line-height-base: 1.75;
    --line-height-heading: 1.3;
    
    /* Spacing */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2.5rem;
    --space-xl: 4rem;
    
    /* Layout */
    --container-max: 1200px;
    --content-max: 820px;
    --sidebar-width: 300px;
    
    /* Transitions */
    --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-fast: all 0.2s ease;
}

html {
    font-size: var(--font-size-base);
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-serif);
    line-height: var(--line-height-base);
    color: var(--text-primary);
    background-color: var(--off-white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ===================================
   TYPOGRAPHY
   =================================== */

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-sans);
    line-height: var(--line-height-heading);
    font-weight: 600;
    margin-bottom: var(--space-md);
    color: var(--text-primary);
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; margin-top: var(--space-lg); }
h4 { font-size: 1.25rem; }
h5 { font-size: 1.1rem; }
h6 { font-size: 1rem; }

p {
    margin-bottom: var(--space-md);
}

.lead {
    font-size: 1.25rem;
    font-weight: 300;
    line-height: 1.6;
    color: var(--text-secondary);
    margin-bottom: var(--space-lg);
}

a {
    color: var(--primary-green);
    text-decoration: none;
    transition: var(--transition-fast);
}

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

strong {
    font-weight: 600;
}

em {
    font-style: italic;
}

/* ===================================
   LAYOUT CONTAINERS
   =================================== */

.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--space-md);
}

.content-layout {
    display: grid;
    grid-template-columns: 1fr var(--sidebar-width);
    gap: var(--space-xl);
    margin-top: var(--space-lg);
}

.main-content {
    max-width: var(--content-max);
}

/* ===================================
   HEADER & NAVIGATION
   =================================== */

.site-header {
    background-color: var(--warm-white);
    border-bottom: 1px solid var(--border-light);
    padding: var(--space-md) 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 8px var(--shadow-subtle);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo h1 {
    font-family: var(--font-sans);
    font-size: 1.75rem;
    font-weight: 600;
    color: var(--primary-green);
    margin: 0;
    letter-spacing: -0.02em;
}

.logo-subtitle {
    font-family: var(--font-sans);
    font-size: 0.75rem;
    color: var(--text-muted);
    margin: 0;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.main-nav ul {
    display: flex;
    list-style: none;
    gap: var(--space-md);
}

.main-nav a {
    font-family: var(--font-sans);
    font-size: 0.95rem;
    color: var(--text-secondary);
    padding: var(--space-xs) var(--space-sm);
    border-radius: 4px;
    transition: var(--transition-fast);
}

.main-nav a:hover,
.main-nav a.active {
    color: var(--primary-green);
    background-color: rgba(45, 95, 63, 0.05);
}

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

.mobile-menu-toggle span {
    display: block;
    width: 25px;
    height: 2px;
    background-color: var(--primary-green);
    transition: var(--transition-fast);
}

/* ===================================
   HERO SECTIONS
   =================================== */

.hero {
    background: linear-gradient(135deg, var(--primary-green) 0%, var(--primary-green-dark) 100%);
    color: var(--warm-white);
    padding: var(--space-xl) 0;
    margin-bottom: var(--space-xl);
}

.hero-content {
    max-width: 800px;
    text-align: center;
    margin: 0 auto;
}

.hero-title {
    font-size: 2.75rem;
    color: var(--warm-white);
    margin-bottom: var(--space-md);
    font-weight: 600;
}

.hero-description {
    font-size: 1.2rem;
    line-height: 1.6;
    margin-bottom: var(--space-lg);
    opacity: 0.95;
}

.hero-actions {
    display: flex;
    gap: var(--space-md);
    justify-content: center;
}

.page-hero {
    background-color: var(--cream);
    padding: var(--space-xl) 0 var(--space-lg);
    margin-bottom: var(--space-xl);
    border-bottom: 3px solid var(--primary-green);
}

.page-title {
    font-size: 2.5rem;
    margin-bottom: var(--space-sm);
    text-align: center;
}

.page-subtitle {
    font-family: var(--font-serif);
    font-size: 1.25rem;
    color: var(--text-secondary);
    text-align: center;
    font-weight: 300;
    margin: 0;
}

/* ===================================
   BUTTONS
   =================================== */

.btn {
    display: inline-block;
    font-family: var(--font-sans);
    font-size: 1rem;
    padding: 0.75rem 1.75rem;
    border-radius: 4px;
    cursor: pointer;
    transition: var(--transition-smooth);
    text-align: center;
    border: 2px solid transparent;
    font-weight: 500;
}

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

.btn-primary:hover {
    background-color: var(--primary-green-dark);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px var(--shadow-medium);
}

.btn-secondary {
    background-color: var(--accent-gold);
    color: var(--warm-white);
}

.btn-secondary:hover {
    background-color: #a07d4d;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px var(--shadow-medium);
}

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

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

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.9rem;
}

/* ===================================
   SECTIONS
   =================================== */

.content-section {
    padding: var(--space-xl) 0;
}

.featured-section,
.highlights-section,
.research-areas-preview {
    padding: var(--space-xl) 0;
    background-color: var(--warm-white);
}

.section-header {
    text-align: center;
    margin-bottom: var(--space-xl);
}

.section-header h3 {
    font-size: 2rem;
    margin-bottom: var(--space-sm);
}

.divider {
    width: 60px;
    height: 3px;
    background-color: var(--accent-gold);
    margin: 0 auto;
}

.section-footer {
    text-align: center;
    margin-top: var(--space-xl);
}

.section-intro {
    max-width: 800px;
    margin: 0 auto var(--space-xl);
}

/* ===================================
   MISSION & VALUES
   =================================== */

.mission-content {
    max-width: 900px;
    margin: 0 auto;
}

.mission-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-lg);
    margin-top: var(--space-lg);
}

.mission-item {
    text-align: center;
    padding: var(--space-lg);
    background-color: var(--cream);
    border-radius: 8px;
    transition: var(--transition-smooth);
}

.mission-item:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px var(--shadow-subtle);
}

.mission-icon {
    font-size: 2.5rem;
    margin-bottom: var(--space-md);
}

.mission-item h4 {
    font-size: 1.25rem;
    margin-bottom: var(--space-sm);
}

.mission-item p {
    font-size: 0.95rem;
    color: var(--text-secondary);
    margin: 0;
}

.values-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-lg);
    margin-top: var(--space-lg);
}

.value-item {
    padding: var(--space-lg);
    background-color: var(--cream);
    border-left: 4px solid var(--primary-green);
    border-radius: 4px;
}

.value-item h4 {
    color: var(--primary-green);
    margin-bottom: var(--space-sm);
}

.value-item p {
    margin: 0;
    font-size: 0.95rem;
}

/* ===================================
   CARDS
   =================================== */

.highlights-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--space-lg);
}

.highlight-card {
    background-color: var(--warm-white);
    padding: var(--space-lg);
    border: 1px solid var(--border-light);
    border-radius: 8px;
    transition: var(--transition-smooth);
}

.highlight-card:hover {
    box-shadow: 0 8px 24px var(--shadow-subtle);
    transform: translateY(-4px);
}

.card-label {
    font-family: var(--font-sans);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--primary-green);
    font-weight: 600;
    margin-bottom: var(--space-sm);
}

.highlight-card h4 {
    font-size: 1.35rem;
    margin-bottom: var(--space-sm);
}

.highlight-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.card-meta {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    margin-top: var(--space-md);
    font-family: var(--font-sans);
    font-size: 0.85rem;
    color: var(--text-muted);
}

.meta-divider {
    color: var(--border-medium);
}

.card-link {
    display: inline-block;
    margin-top: var(--space-md);
    font-family: var(--font-sans);
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--primary-green);
}

.card-link:hover {
    color: var(--primary-green-dark);
}

/* ===================================
   RESEARCH AREAS
   =================================== */

.research-preview-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: var(--space-lg);
}

.research-preview-item {
    padding: var(--space-lg);
    background-color: var(--cream);
    border-radius: 8px;
    border-top: 3px solid var(--primary-green);
    transition: var(--transition-smooth);
}

.research-preview-item:hover {
    transform: translateY(-4px);
    box-shadow: 0 6px 20px var(--shadow-subtle);
}

.research-preview-item h4 {
    font-size: 1.15rem;
    margin-bottom: var(--space-sm);
    color: var(--primary-green-dark);
}

.research-preview-item p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin: 0;
}

.research-areas {
    display: flex;
    flex-direction: column;
    gap: var(--space-xl);
}

.research-area-card {
    background-color: var(--warm-white);
    padding: var(--space-xl);
    border: 1px solid var(--border-light);
    border-radius: 8px;
    position: relative;
}

.research-number {
    position: absolute;
    top: var(--space-lg);
    right: var(--space-lg);
    font-family: var(--font-sans);
    font-size: 3rem;
    font-weight: 700;
    color: rgba(45, 95, 63, 0.08);
    line-height: 1;
}

.research-area-card h3 {
    font-size: 1.75rem;
    margin-top: 0;
    margin-bottom: var(--space-md);
    color: var(--primary-green);
}

.research-summary {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: var(--space-lg);
}

.research-meta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
    margin-top: var(--space-lg);
}

.meta-tag {
    font-family: var(--font-sans);
    font-size: 0.8rem;
    padding: 0.35rem 0.75rem;
    background-color: var(--cream);
    border: 1px solid var(--border-light);
    border-radius: 20px;
    color: var(--text-secondary);
}

/* ===================================
   PUBLICATIONS
   =================================== */

.publication-item {
    margin-bottom: var(--space-xl);
    padding-bottom: var(--space-xl);
    border-bottom: 1px solid var(--border-light);
}

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

.publication-header {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    margin-bottom: var(--space-sm);
    flex-wrap: wrap;
    gap: var(--space-sm);
}

.publication-header h4 {
    margin: 0;
    font-size: 1.5rem;
    color: var(--primary-green-dark);
}

.publication-type {
    font-family: var(--font-sans);
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
}

.publication-description {
    color: var(--text-secondary);
    margin-bottom: var(--space-md);
}

.article-list {
    margin-top: var(--space-md);
}

.article-entry {
    margin-bottom: var(--space-lg);
    padding: var(--space-md);
    background-color: var(--cream);
    border-radius: 6px;
}

.article-entry h5 {
    font-size: 1.15rem;
    margin-bottom: var(--space-xs);
    color: var(--primary-green-dark);
}

.article-authors {
    font-family: var(--font-sans);
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-bottom: var(--space-sm);
}

.article-abstract {
    font-size: 0.95rem;
    color: var(--text-secondary);
    margin: 0;
}

.publication-access {
    margin-top: var(--space-md);
    font-family: var(--font-sans);
    font-size: 0.9rem;
    color: var(--text-muted);
}

.simple-list {
    list-style-position: inside;
    margin-top: var(--space-sm);
}

.simple-list li {
    margin-bottom: var(--space-sm);
    color: var(--text-secondary);
}

/* ===================================
   STRUCTURE & LEADERSHIP
   =================================== */

.structure-intro {
    max-width: 800px;
    margin: 0 auto var(--space-xl);
}

.org-chart {
    margin: var(--space-xl) 0;
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

.org-level {
    display: flex;
    justify-content: center;
    gap: var(--space-lg);
}

.org-level.multi {
    flex-wrap: wrap;
}

.org-card {
    padding: var(--space-lg);
    border-radius: 8px;
    text-align: center;
    min-width: 250px;
    transition: var(--transition-smooth);
}

.org-card.primary {
    background-color: var(--primary-green);
    color: var(--warm-white);
}

.org-card.secondary {
    background-color: var(--primary-green-light);
    color: var(--warm-white);
}

.org-card.tertiary {
    background-color: var(--cream);
    border: 2px solid var(--primary-green);
}

.org-title {
    font-family: var(--font-sans);
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: var(--space-xs);
}

.org-description {
    font-size: 0.9rem;
    margin: 0;
    opacity: 0.9;
}

.leadership-section {
    margin: var(--space-xl) 0;
    display: flex;
    flex-direction: column;
    gap: var(--space-xl);
}

.leader-card {
    background-color: var(--warm-white);
    padding: var(--space-xl);
    border: 1px solid var(--border-light);
    border-left: 4px solid var(--primary-green);
    border-radius: 8px;
}

.leader-header {
    margin-bottom: var(--space-md);
}

.leader-header h4 {
    font-size: 1.5rem;
    margin-bottom: var(--space-xs);
    color: var(--primary-green-dark);
}

.leader-position {
    font-family: var(--font-sans);
    font-size: 1rem;
    color: var(--accent-gold);
    font-weight: 500;
}

.leader-credentials {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
    margin-bottom: var(--space-md);
}

.credential {
    font-family: var(--font-sans);
    font-size: 0.9rem;
    color: var(--text-muted);
}

.directors-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-lg);
    margin-top: var(--space-lg);
}

.director-card {
    padding: var(--space-lg);
    background-color: var(--cream);
    border-radius: 8px;
    border-top: 3px solid var(--accent-gold);
}

.director-card h4 {
    font-size: 1.15rem;
    margin-bottom: var(--space-sm);
    color: var(--primary-green-dark);
}

.director-name {
    font-family: var(--font-sans);
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--space-xs);
}

.director-specialty {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin: 0;
}

/* ===================================
   CONTACT PAGE
   =================================== */

.contact-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-xl);
    margin-top: var(--space-lg);
}

.contact-info h3,
.contact-form-container h3 {
    margin-bottom: var(--space-lg);
}

.contact-methods {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
    margin: var(--space-xl) 0;
}

.contact-method {
    display: flex;
    gap: var(--space-md);
}

.contact-icon {
    font-size: 2rem;
    flex-shrink: 0;
}

.contact-details h4 {
    font-size: 1.1rem;
    margin-bottom: var(--space-xs);
}

.contact-details p {
    margin-bottom: var(--space-xs);
    font-size: 0.95rem;
}

.contact-note {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.departments-contact {
    margin-top: var(--space-xl);
    padding: var(--space-lg);
    background-color: var(--cream);
    border-radius: 8px;
}

.departments-contact h4 {
    margin-bottom: var(--space-md);
}

.dept-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.dept-item {
    font-size: 0.95rem;
    padding: var(--space-sm) 0;
    border-bottom: 1px solid var(--border-light);
}

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

.dept-item strong {
    color: var(--text-primary);
    margin-right: var(--space-xs);
}

/* ===================================
   FORMS
   =================================== */

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

.form-group {
    display: flex;
    flex-direction: column;
}

.form-group label {
    font-family: var(--font-sans);
    font-size: 0.9rem;
    font-weight: 500;
    margin-bottom: var(--space-xs);
    color: var(--text-primary);
}

.form-group input,
.form-group select,
.form-group textarea {
    font-family: var(--font-serif);
    font-size: 1rem;
    padding: 0.75rem;
    border: 1px solid var(--border-medium);
    border-radius: 4px;
    background-color: var(--warm-white);
    transition: var(--transition-fast);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-green);
    box-shadow: 0 0 0 3px rgba(45, 95, 63, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.form-message {
    padding: var(--space-md);
    border-radius: 4px;
    margin-top: var(--space-md);
    display: none;
}

.form-message.success {
    display: block;
    background-color: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.form-message.error {
    display: block;
    background-color: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

/* ===================================
   VISIT & FAQ SECTIONS
   =================================== */

.visit-section,
.faq-section {
    padding: var(--space-xl) 0;
    background-color: var(--cream);
}

.visit-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: var(--space-xl);
    margin-top: var(--space-lg);
}

.visit-hours {
    background-color: var(--warm-white);
    padding: var(--space-lg);
    border-radius: 8px;
    border: 1px solid var(--border-light);
    height: fit-content;
}

.visit-hours h4 {
    margin-bottom: var(--space-md);
}

.hours-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.hours-item {
    display: flex;
    justify-content: space-between;
    padding: var(--space-xs) 0;
    font-size: 0.95rem;
}

.hours-note {
    margin-top: var(--space-md);
    font-size: 0.85rem;
    color: var(--text-muted);
    font-style: italic;
}

.faq-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-lg);
    margin-top: var(--space-lg);
}

.faq-item {
    background-color: var(--warm-white);
    padding: var(--space-lg);
    border-radius: 8px;
    border-left: 3px solid var(--accent-gold);
}

.faq-item h4 {
    font-size: 1.1rem;
    margin-bottom: var(--space-sm);
    color: var(--primary-green-dark);
}

.faq-item p {
    font-size: 0.95rem;
    margin: 0;
    color: var(--text-secondary);
}

/* ===================================
   CTA SECTIONS
   =================================== */

.cta-section {
    background-color: var(--primary-green);
    color: var(--warm-white);
    padding: var(--space-xl) 0;
    text-align: center;
}

.cta-content h3 {
    color: var(--warm-white);
    font-size: 2rem;
    margin-bottom: var(--space-sm);
}

.cta-content p {
    font-size: 1.1rem;
    opacity: 0.95;
    margin-bottom: var(--space-lg);
}

.cta-buttons {
    display: flex;
    gap: var(--space-md);
    justify-content: center;
}

/* ===================================
   EXPANDABLE CONTENT
   =================================== */

.expandable-content {
    margin-top: var(--space-md);
}

.expandable-full {
    display: none;
    animation: fadeIn 0.3s ease;
}

.expandable-content.expanded .expandable-preview {
    display: none;
}

.expandable-content.expanded .expandable-full {
    display: block;
}

.expand-toggle {
    font-family: var(--font-sans);
    font-size: 0.9rem;
    color: var(--primary-green);
    background: none;
    border: none;
    cursor: pointer;
    margin-top: var(--space-md);
    padding: var(--space-xs) 0;
    font-weight: 500;
    transition: var(--transition-fast);
}

.expand-toggle:hover {
    color: var(--primary-green-dark);
    text-decoration: underline;
}

.expandable-content.expanded .expand-toggle::after {
    content: ' ▲';
}

.expand-toggle::after {
    content: ' ▼';
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ===================================
   SIDEBAR
   =================================== */

.sidebar {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

.sidebar-card {
    background-color: var(--cream);
    padding: var(--space-lg);
    border-radius: 8px;
    border-top: 3px solid var(--primary-green);
}

.sidebar-card h4 {
    font-size: 1.15rem;
    margin-bottom: var(--space-md);
}

.fact-list,
.link-list,
.stat-list {
    list-style: none;
}

.fact-list li,
.stat-list li {
    padding: var(--space-sm) 0;
    border-bottom: 1px solid var(--border-light);
    font-size: 0.95rem;
}

.fact-list li:last-child,
.stat-list li:last-child {
    border-bottom: none;
}

.fact-list strong,
.stat-list strong {
    color: var(--primary-green);
}

.link-list li {
    margin-bottom: var(--space-sm);
}

.link-list a {
    font-size: 0.95rem;
}

/* ===================================
   TEXT CONTENT
   =================================== */

.text-content {
    max-width: var(--content-max);
}

.text-content p {
    text-align: justify;
}

/* ===================================
   FOOTER
   =================================== */

.site-footer {
    background-color: var(--primary-green-dark);
    color: var(--warm-white);
    padding: var(--space-xl) 0 var(--space-md);
    margin-top: var(--space-xl);
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: var(--space-xl);
    margin-bottom: var(--space-lg);
}

.footer-section h4,
.footer-section h5 {
    color: var(--warm-white);
    margin-bottom: var(--space-md);
}

.footer-section h5 {
    font-size: 1rem;
}

.footer-section p {
    margin-bottom: var(--space-sm);
    opacity: 0.9;
}

.footer-tagline {
    font-size: 0.9rem;
    font-style: italic;
    opacity: 0.8;
}

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

.footer-section ul li {
    margin-bottom: var(--space-xs);
}

.footer-section a {
    color: var(--warm-white);
    opacity: 0.9;
    transition: var(--transition-fast);
}

.footer-section a:hover {
    opacity: 1;
    color: var(--accent-gold-light);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.2);
    padding-top: var(--space-md);
    text-align: center;
}

.footer-bottom p {
    margin: 0;
    font-size: 0.9rem;
    opacity: 0.8;
}

/* ===================================
   RESPONSIVE DESIGN
   =================================== */

@media (max-width: 1024px) {
    .content-layout {
        grid-template-columns: 1fr;
    }
    
    .sidebar {
        order: -1;
    }
    
    .contact-layout,
    .visit-content {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    :root {
        --font-size-base: 16px;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .page-title {
        font-size: 2rem;
    }
    
    h1 { font-size: 2rem; }
    h2 { font-size: 1.75rem; }
    h3 { font-size: 1.35rem; }
    
    .main-nav {
        z-index: 9999;
        pointer-events: none;
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background-color: var(--warm-white);
        border-bottom: 1px solid var(--border-light);
        padding: var(--space-md);
        transform: translateY(-110%);
        opacity: 0;
        transition: var(--transition-smooth);
        box-shadow: 0 4px 12px var(--shadow-subtle);
    }
    
    .main-nav.active {
        transform: translateY(0);
        pointer-events: all;
        opacity: 1;
    }
    
    .main-nav ul {
        flex-direction: column;
        gap: 0;
    }
    
    .main-nav a {
        display: block;
        padding: var(--space-sm);
        border-bottom: 1px solid var(--border-light);
    }
    
    .mobile-menu-toggle {
        display: flex;
    }
    
    .mobile-menu-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }
    
    .mobile-menu-toggle.active span:nth-child(2) {
        opacity: 0;
    }
    
    .mobile-menu-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -6px);
    }
    
    .hero-actions,
    .cta-buttons {
        flex-direction: column;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: var(--space-lg);
    }
    
    .mission-grid,
    .highlights-grid,
    .research-preview-grid,
    .directors-grid,
    .faq-grid {
        grid-template-columns: 1fr;
    }
    
    .org-level.multi {
        flex-direction: column;
    }
    
    .research-number {
        font-size: 2rem;
        top: var(--space-md);
        right: var(--space-md);
    }
}

@media (max-width: 480px) {
    :root {
        --space-lg: 2rem;
        --space-xl: 3rem;
    }
    
    .container {
        padding: 0 var(--space-sm);
    }
    
    .highlight-card,
    .research-area-card,
    .leader-card {
        padding: var(--space-md);
    }
}

/* ===================================
   PRINT STYLES
   =================================== */

@media print {
    .site-header,
    .site-footer,
    .hero-actions,
    .cta-section,
    .expand-toggle,
    .btn {
        display: none;
    }
    
    body {
        background-color: white;
        color: black;
    }
    
    .expandable-full {
        display: block !important;
    }
    
    .expandable-preview {
        display: none !important;
    }
}