/* ========================================
   Brain Theory Group - Multi-page Website Styles
   ======================================== */

/* CSS Variables */
:root {
    --primary-color: #2c3e50;
    --secondary-color: #3498db;
    --accent-color: #e74c3c;
    --text-primary: #2c3e50;
    --text-secondary: #7f8c8d;
    --text-light: #ecf0f1;
    --bg-light: #ffffff;
    --bg-dark: #1a1a1a;
    --bg-section: #f8f9fa;
    --border-color: #e0e0e0;
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-secondary: linear-gradient(135deg, #2c3e50 0%, #3498db 100%);
    --gradient-overlay: linear-gradient(135deg, rgba(44, 62, 80, 0.9) 0%, rgba(52, 152, 219, 0.8) 100%);
    --font-primary: 'Noto Sans KR', 'Inter', sans-serif;
    --font-display: 'Playfair Display', serif;
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.1);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 30px rgba(0,0,0,0.15);
    --shadow-xl: 0 20px 60px rgba(0,0,0,0.2);
}

/* Reset & Base */
* {margin: 0; padding: 0; box-sizing: border-box;}
html {scroll-behavior: smooth; font-size: 16px;}
body {font-family: var(--font-primary); color: var(--text-primary); line-height: 1.6; overflow-x: hidden;}
h1, h2, h3, h4, h5, h6 {font-weight: 700; line-height: 1.2; margin-bottom: var(--spacing-sm);}
h1 {font-size: clamp(2.5rem, 5vw, 4rem);}
h2 {font-size: clamp(2rem, 4vw, 3rem);}
h3 {font-size: clamp(1.5rem, 3vw, 2rem);}
p {margin-bottom: var(--spacing-sm);}
a {text-decoration: none; color: inherit; transition: var(--transition-normal);}
ul {list-style: none;}
img {max-width: 100%; height: auto; display: block;}

/* Container & Layout */
.container {max-width: 1200px; margin: 0 auto; padding: 0 var(--spacing-md);}
.section {padding: var(--spacing-xl) 0;}
.section-dark {background: var(--bg-dark); color: var(--text-light);}

/* Navigation */
.navbar {position: fixed; top: 0; left: 0; right: 0; background: rgba(255, 255, 255, 0.95); backdrop-filter: blur(10px); box-shadow: var(--shadow-sm); z-index: 1000; transition: var(--transition-normal);}
.navbar.scrolled {box-shadow: var(--shadow-md);}
.nav-wrapper {display: flex; justify-content: space-between; align-items: center; padding: var(--spacing-sm) 0;}
.logo {display: flex; flex-direction: column; gap: 0.2rem;}
.logo-text {font-size: 1.8rem; font-weight: 800; background: var(--gradient-primary); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;}
.logo-subtitle {font-size: 0.75rem; color: var(--text-secondary); font-weight: 500; text-transform: uppercase; letter-spacing: 0.1em;}
.nav-menu {display: flex; gap: var(--spacing-md); align-items: center;}
.nav-link {color: var(--text-primary); font-weight: 500; padding: var(--spacing-xs) var(--spacing-sm); border-radius: 8px; transition: var(--transition-fast); position: relative;}
.nav-link::after {content: ''; position: absolute; bottom: 0; left: 50%; transform: translateX(-50%) scaleX(0); width: 80%; height: 2px; background: var(--gradient-primary); transition: transform var(--transition-normal);}
.nav-link:hover, .nav-link.active {color: var(--secondary-color);}
.nav-link:hover::after, .nav-link.active::after {transform: translateX(-50%) scaleX(1);}
.lang-switch {background: var(--bg-section); border-radius: 20px; font-weight: 600;}
.mobile-menu-toggle {display: none; flex-direction: column; gap: 5px; background: none; border: none; cursor: pointer; padding: var(--spacing-xs);}
.mobile-menu-toggle span {width: 25px; height: 3px; background: var(--text-primary); border-radius: 3px; transition: var(--transition-normal);}

/* Hero Section */
.hero {min-height: 100vh; display: flex; align-items: center; justify-content: center; position: relative; overflow: hidden; padding-top: 80px; background-size: cover; background-position: center;}
.hero-content {position: relative; z-index: 1; text-align: center; color: var(--text-light);}
.hero-title {font-family: var(--font-display); font-size: clamp(3rem, 6vw, 5rem); margin-bottom: var(--spacing-sm); letter-spacing: -0.02em;}
.hero-subtitle {font-size: clamp(1.2rem, 2.5vw, 1.8rem); font-weight: 300; margin-bottom: var(--spacing-md); color: rgba(255, 255, 255, 0.9);}
.hero-description {font-size: clamp(1rem, 1.5vw, 1.2rem); max-width: 800px; margin: 0 auto var(--spacing-md); line-height: 1.8; color: rgba(255, 255, 255, 0.85);}
.hero-meta {margin-bottom: var(--spacing-lg);}
.hero-meta p {font-size: 1.1rem; margin-bottom: var(--spacing-xs); color: rgba(255, 255, 255, 0.8);}
.university {font-weight: 600;}
.director {font-style: italic;}
.hero-cta {display: flex; gap: var(--spacing-sm); justify-content: center; flex-wrap: wrap;}

/* Buttons */
.btn {display: inline-block; padding: 1rem 2rem; border-radius: 50px; font-weight: 600; font-size: 1rem; text-align: center; cursor: pointer; transition: all var(--transition-normal); border: 2px solid transparent;}
.btn-primary {background: var(--gradient-primary); color: white; box-shadow: var(--shadow-md);}
.btn-primary:hover {transform: translateY(-3px); box-shadow: var(--shadow-lg);}
.btn-secondary {background: transparent; color: white; border-color: white;}
.btn-secondary:hover {background: white; color: var(--primary-color);}
.btn-lg {padding: 1.2rem 2.5rem; font-size: 1.1rem;}

/* Scroll Indicator */
.scroll-indicator {position: absolute; bottom: 30px; left: 50%; transform: translateX(-50%); display: flex; flex-direction: column; gap: 5px; z-index: 2; cursor: pointer;}
.scroll-indicator span {width: 3px; height: 15px; background: rgba(255, 255, 255, 0.6); border-radius: 3px; animation: scrollBounce 1.5s ease-in-out infinite;}
.scroll-indicator span:nth-child(2) {animation-delay: 0.2s;}
.scroll-indicator span:nth-child(3) {animation-delay: 0.4s;}
@keyframes scrollBounce {0%, 100% {opacity: 0.3; transform: translateY(0);} 50% {opacity: 1; transform: translateY(10px);}}

/* Page Header */
.page-header {padding: 8rem 0 4rem; background: var(--gradient-primary); text-align: center; color: white;}
.page-header h1 {font-size: clamp(2.5rem, 5vw, 3.5rem); margin-bottom: var(--spacing-sm);}
.page-header p {font-size: 1.2rem; opacity: 0.9;}

/* Section Headers */
.section-header {text-align: center; margin-bottom: var(--spacing-lg);}
.section-title {font-family: var(--font-display); margin-bottom: var(--spacing-sm);}
.section-divider {width: 80px; height: 4px; background: var(--gradient-primary); margin: 0 auto var(--spacing-sm); border-radius: 2px;}
.section-description {font-size: 1.2rem; color: var(--text-secondary); max-width: 600px; margin: 0 auto;}
.section-dark .section-description {color: rgba(255, 255, 255, 0.7);}

/* About Section */
.about-content {display: grid; grid-template-columns: 1fr 1fr; gap: var(--spacing-lg); align-items: start;}
.about-text .lead {font-size: 1.3rem; font-weight: 500; color: var(--secondary-color); margin-bottom: var(--spacing-md); line-height: 1.7;}
.about-text p {font-size: 1.1rem; line-height: 1.8; margin-bottom: var(--spacing-md); color: var(--text-secondary);}
.about-image {position: relative; border-radius: 20px; overflow: hidden; box-shadow: var(--shadow-lg);}
.about-image img {width: 100%; height: 100%; object-fit: cover;}
.image-caption {position: absolute; bottom: 0; left: 0; right: 0; background: linear-gradient(to top, rgba(0,0,0,0.8), transparent); color: white; padding: 1rem; text-align: center; font-weight: 600;}

/* Keywords Grid */
.keywords-grid {display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: var(--spacing-md);}
.keyword-card {background: rgba(255, 255, 255, 0.05); padding: var(--spacing-lg); border-radius: 20px; text-align: center; transition: var(--transition-normal); border: 1px solid rgba(255, 255, 255, 0.1);}
.keyword-card:hover {transform: translateY(-10px); background: rgba(255, 255, 255, 0.08); box-shadow: var(--shadow-xl);}
.keyword-icon {width: 70px; height: 70px; background: var(--gradient-primary); border-radius: 50%; display: flex; align-items: center; justify-content: center; margin: 0 auto var(--spacing-sm); font-size: 2rem; color: white;}
.keyword-card h3 {color: white; font-size: 1.1rem;}

/* Preview Grid */
.preview-grid {display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: var(--spacing-lg);}
.preview-card {background: var(--bg-section); padding: var(--spacing-lg); border-radius: 20px; box-shadow: var(--shadow-md); transition: var(--transition-normal);}
.preview-card:hover {transform: translateY(-10px); box-shadow: var(--shadow-xl);}
.preview-icon {width: 60px; height: 60px; background: var(--gradient-primary); border-radius: 50%; display: flex; align-items: center; justify-content: center; margin-bottom: var(--spacing-sm); font-size: 1.5rem; color: white;}
.preview-card h3 {margin-bottom: var(--spacing-sm); color: var(--primary-color);}
.preview-card p {color: var(--text-secondary); line-height: 1.7; margin-bottom: var(--spacing-sm);}
.preview-link {color: var(--secondary-color); font-weight: 600; display: inline-flex; align-items: center; gap: 0.5rem;}
.preview-link:hover {gap: 0.8rem;}

/* Research Detailed */
.research-detailed {max-width: 1400px; margin: 0 auto;}
.research-item {display: grid; grid-template-columns: 2fr 1fr; gap: var(--spacing-lg); margin-bottom: var(--spacing-xl); background: var(--bg-section); border-radius: 20px; padding: var(--spacing-lg); box-shadow: var(--shadow-md);}
.research-item.reverse {grid-template-columns: 1fr 2fr;}
.research-item.reverse .research-content {order: 2;}
.research-item.reverse .research-image {order: 1;}
.research-number {font-size: 3rem; font-weight: 800; background: var(--gradient-primary); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; margin-bottom: var(--spacing-sm);}
.research-text h2 {color: var(--primary-color); margin-bottom: 0.5rem;}
.research-text h3 {font-size: 1.2rem; color: var(--text-secondary); font-weight: 500; margin-bottom: var(--spacing-md);}
.research-details, .research-techniques {margin-top: var(--spacing-md);}
.research-details h4, .research-techniques h4 {font-size: 1.1rem; margin-bottom: 0.5rem; color: var(--primary-color);}
.research-details ul {list-style: disc; padding-left: 1.5rem;}
.research-details li {margin-bottom: 0.5rem; color: var(--text-secondary);}
.tech-tags {display: flex; flex-wrap: wrap; gap: 0.5rem;}
.tech-tags span {padding: 0.5rem 1rem; background: white; border-radius: 20px; font-size: 0.9rem; box-shadow: var(--shadow-sm);}
.research-image {border-radius: 15px; overflow: hidden;}
.research-image img {width: 100%; height: 100%; object-fit: cover;}
.image-placeholder {background: linear-gradient(135deg, #667eea 0%, #764ba2 100%); height: 100%; display: flex; flex-direction: column; align-items: center; justify-content: center; color: white; border-radius: 15px; padding: var(--spacing-md);}
.image-placeholder i {font-size: 4rem; margin-bottom: var(--spacing-sm);}

/* Methodology Grid */
.methodology-grid {display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: var(--spacing-md);}
.method-card {background: rgba(255, 255, 255, 0.05); padding: var(--spacing-md); border-radius: 15px; text-align: center; border: 1px solid rgba(255, 255, 255, 0.1); transition: var(--transition-normal);}
.method-card:hover {background: rgba(255, 255, 255, 0.08); transform: translateY(-5px);}
.method-icon {width: 60px; height: 60px; background: var(--gradient-primary); border-radius: 50%; display: flex; align-items: center; justify-content: center; margin: 0 auto var(--spacing-sm); font-size: 1.5rem; color: white;}
.method-card h3 {color: white; font-size: 1.1rem; margin-bottom: 0.5rem;}
.method-card p {color: rgba(255, 255, 255, 0.8); font-size: 0.95rem;}

/* Project Cards */
.project-detail-card {background: var(--bg-section); border-radius: 20px; padding: var(--spacing-lg); margin-bottom: var(--spacing-lg); box-shadow: var(--shadow-md); transition: var(--transition-normal);}
.project-detail-card:hover {box-shadow: var(--shadow-xl);}
.project-header {display: flex; gap: var(--spacing-md); align-items: start; margin-bottom: var(--spacing-md);}
.project-number-large {font-size: 4rem; font-weight: 800; background: var(--gradient-primary); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; line-height: 1;}
.project-title-section h2 {color: var(--primary-color); margin-bottom: 0.5rem;}
.project-title-section h3 {font-size: 1.2rem; color: var(--text-secondary); font-weight: 500;}
.project-body {padding: 0 var(--spacing-md);}
.project-description {margin-bottom: var(--spacing-md); font-size: 1.1rem; color: var(--text-secondary);}
.project-details-grid {display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: var(--spacing-md);}
.detail-box {background: white; padding: var(--spacing-md); border-radius: 15px; box-shadow: var(--shadow-sm);}
.detail-box h4 {color: var(--primary-color); margin-bottom: var(--spacing-sm); display: flex; align-items: center; gap: 0.5rem;}
.detail-box ul {list-style: disc; padding-left: 1.5rem;}
.detail-box li {margin-bottom: 0.5rem; color: var(--text-secondary);}

/* Collaboration Cards */
.collab-grid {display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: var(--spacing-md);}
.collab-card {background: rgba(255, 255, 255, 0.05); padding: var(--spacing-lg); border-radius: 15px; text-align: center; border: 1px solid rgba(255, 255, 255, 0.1); transition: var(--transition-normal);}
.collab-card:hover {background: rgba(255, 255, 255, 0.08); transform: translateY(-5px);}
.collab-card i {font-size: 3rem; color: var(--secondary-color); margin-bottom: var(--spacing-sm);}
.collab-card h3 {color: white; margin-bottom: var(--spacing-sm);}
.collab-card p {color: rgba(255, 255, 255, 0.8);}

/* Contact Pages */
.contact-info-grid {display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: var(--spacing-lg);}
.contact-info-card {background: var(--bg-section); padding: var(--spacing-lg); border-radius: 20px; text-align: center; box-shadow: var(--shadow-md); transition: var(--transition-normal);}
.contact-info-card:hover {transform: translateY(-5px); box-shadow: var(--shadow-lg);}
.contact-info-icon {width: 80px; height: 80px; background: var(--gradient-primary); border-radius: 50%; display: flex; align-items: center; justify-content: center; margin: 0 auto var(--spacing-sm); font-size: 2rem; color: white;}
.contact-info-card h3 {margin-bottom: var(--spacing-sm); color: var(--primary-color);}
.contact-info-card p {color: var(--text-secondary);}

.campus-section {margin: var(--spacing-xl) 0;}
.campus-image-container {position: relative; height: 400px; overflow: hidden;}
.campus-image-container img {width: 100%; height: 100%; object-fit: cover;}
.campus-overlay {position: absolute; bottom: 0; left: 0; right: 0; background: linear-gradient(to top, rgba(0,0,0,0.8), transparent); padding: var(--spacing-lg) 0;}
.campus-overlay h2 {color: white; margin-bottom: 0.5rem;}
.campus-overlay p {color: rgba(255, 255, 255, 0.9);}

.join-cards-grid {display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: var(--spacing-lg);}
.join-card {background: var(--bg-section); padding: var(--spacing-lg); border-radius: 20px; box-shadow: var(--shadow-md); transition: var(--transition-normal);}
.join-card:hover {transform: translateY(-5px); box-shadow: var(--shadow-lg);}
.join-icon {width: 70px; height: 70px; background: var(--gradient-primary); border-radius: 50%; display: flex; align-items: center; justify-content: center; margin-bottom: var(--spacing-sm); font-size: 2rem; color: white;}
.join-card h3 {margin-bottom: var(--spacing-sm); color: var(--primary-color);}
.join-card p {color: var(--text-secondary); margin-bottom: var(--spacing-md);}
.join-requirements h4 {font-size: 1rem; color: var(--primary-color); margin: var(--spacing-sm) 0;}
.join-requirements ul {list-style: disc; padding-left: 1.5rem;}
.join-requirements li {margin-bottom: 0.3rem; color: var(--text-secondary); font-size: 0.95rem;}

.opportunities-grid {display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: var(--spacing-md);}
.opportunity-card {background: rgba(255, 255, 255, 0.05); padding: var(--spacing-lg); border-radius: 15px; border: 1px solid rgba(255, 255, 255, 0.1);}
.opportunity-card h3 {color: white; margin-bottom: var(--spacing-sm); display: flex; align-items: center; gap: 0.5rem;}
.opportunity-card p {color: rgba(255, 255, 255, 0.8); margin-bottom: var(--spacing-sm);}
.opportunity-card ul {list-style: disc; padding-left: 1.5rem;}
.opportunity-card li {color: rgba(255, 255, 255, 0.7); margin-bottom: 0.3rem; font-size: 0.95rem;}

.contact-cta-box {background: var(--gradient-primary); padding: var(--spacing-xl); border-radius: 20px; text-align: center; color: white;}
.contact-cta-content h2 {margin-bottom: var(--spacing-sm);}
.contact-cta-content p {font-size: 1.1rem; margin-bottom: var(--spacing-sm); opacity: 0.9;}
.contact-note {background: rgba(255, 255, 255, 0.1); padding: var(--spacing-sm); border-radius: 10px; display: inline-flex; align-items: center; gap: 0.5rem; margin: var(--spacing-md) 0;}
.contact-cta-buttons {margin-top: var(--spacing-md);}

.map-info {display: grid; grid-template-columns: 1fr 1fr; gap: var(--spacing-lg); margin-top: var(--spacing-lg);}
.map-details h3 {color: white; margin-bottom: var(--spacing-sm); display: flex; align-items: center; gap: 0.5rem;}
.map-details p {color: rgba(255, 255, 255, 0.8); line-height: 1.8;}
.map-placeholder {background: rgba(255, 255, 255, 0.05); padding: var(--spacing-xl); border-radius: 15px; display: flex; flex-direction: column; align-items: center; justify-content: center; text-align: center; border: 2px dashed rgba(255, 255, 255, 0.2);}
.map-icon i {font-size: 4rem; color: var(--secondary-color); margin-bottom: var(--spacing-sm);}
.map-placeholder p {color: white; margin: 0.5rem 0;}
.map-address {color: rgba(255, 255, 255, 0.7); font-size: 0.95rem;}

/* CTA Section */
.cta-section {background: var(--bg-section);}
.section-dark .cta-section {background: rgba(255, 255, 255, 0.05);}
.cta-content {text-align: center; max-width: 800px; margin: 0 auto;}
.cta-content h2 {margin-bottom: var(--spacing-sm);}
.cta-content p {font-size: 1.2rem; margin-bottom: var(--spacing-md);}
.cta-buttons {display: flex; gap: var(--spacing-sm); justify-content: center; flex-wrap: wrap; margin-top: var(--spacing-md);}

/* Footer */
.footer {background: var(--primary-color); color: var(--text-light); padding: var(--spacing-lg) 0 var(--spacing-md);}
.footer-content {display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: var(--spacing-lg); margin-bottom: var(--spacing-lg);}
.footer-section h3 {color: white; margin-bottom: var(--spacing-sm); font-size: 1.2rem;}
.footer-section p, .footer-section li {color: rgba(255, 255, 255, 0.7); margin-bottom: 0.5rem;}
.footer-director {font-style: italic; font-weight: 600;}
.footer-section ul {display: flex; flex-direction: column; gap: 0.5rem;}
.footer-section a:hover {color: white; padding-left: 5px;}
.active-lang {font-weight: 700; color: white;}
.footer-bottom {border-top: 1px solid rgba(255, 255, 255, 0.1); padding-top: var(--spacing-md); text-align: center;}
.footer-bottom p {color: rgba(255, 255, 255, 0.6); font-size: 0.9rem;}

/* Animations */
.fade-in {animation: fadeIn 1s ease-out;}
.fade-in-delay-1 {animation: fadeIn 1s ease-out 0.2s backwards;}
.fade-in-delay-2 {animation: fadeIn 1s ease-out 0.4s backwards;}
.fade-in-delay-3 {animation: fadeIn 1s ease-out 0.6s backwards;}
.fade-in-delay-4 {animation: fadeIn 1s ease-out 0.8s backwards;}
@keyframes fadeIn {from {opacity: 0; transform: translateY(30px);} to {opacity: 1; transform: translateY(0);}}

/* Enhanced Contact Page Styles */
.quick-contact {background: var(--bg-section);}
.quick-contact-grid {display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: var(--spacing-md);}
.quick-contact-card {background: white; padding: var(--spacing-lg); border-radius: 20px; text-align: center; box-shadow: var(--shadow-md); transition: var(--transition-normal);}
.quick-contact-card:hover {transform: translateY(-5px); box-shadow: var(--shadow-lg);}
.quick-contact-icon {width: 80px; height: 80px; background: var(--gradient-primary); border-radius: 50%; display: flex; align-items: center; justify-content: center; margin: 0 auto var(--spacing-sm); font-size: 2rem; color: white;}
.quick-contact-card h3 {color: var(--text-secondary); font-size: 0.95rem; text-transform: uppercase; margin-bottom: var(--spacing-sm);}
.quick-contact-card .name {font-size: 1.5rem; font-weight: 700; color: var(--primary-color); margin-bottom: 0.3rem;}
.quick-contact-card .title {color: var(--text-secondary); margin-bottom: 0.3rem;}
.quick-contact-card .department {color: var(--text-secondary); font-size: 0.95rem;}

.location-content {display: grid; grid-template-columns: 1fr 1.5fr; gap: var(--spacing-lg); margin-top: var(--spacing-lg);}
.location-info-box {display: flex; flex-direction: column; gap: var(--spacing-md);}
.info-item {display: flex; gap: var(--spacing-sm); background: rgba(255, 255, 255, 0.05); padding: var(--spacing-md); border-radius: 15px; border: 1px solid rgba(255, 255, 255, 0.1);}
.info-icon {width: 50px; height: 50px; background: var(--gradient-primary); border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 1.3rem; color: white; flex-shrink: 0;}
.info-text h4 {color: white; font-size: 1.1rem; margin-bottom: 0.5rem;}
.info-text p {color: rgba(255, 255, 255, 0.8); margin-bottom: 0.3rem; font-size: 0.95rem; line-height: 1.6;}
.info-text strong {color: rgba(255, 255, 255, 0.95); font-weight: 600;}

.map-container {position: relative;}
.map-wrapper {border-radius: 15px; overflow: hidden; box-shadow: var(--shadow-xl); margin-bottom: var(--spacing-sm);}
.map-wrapper iframe {display: block; width: 100%; min-height: 450px;}
.map-links {display: flex; gap: var(--spacing-sm); flex-wrap: wrap;}
.map-link {display: inline-flex; align-items: center; gap: 0.5rem; padding: 0.7rem 1.2rem; background: rgba(255, 255, 255, 0.1); border: 1px solid rgba(255, 255, 255, 0.2); border-radius: 25px; color: white; font-size: 0.9rem; transition: var(--transition-normal);}
.map-link:hover {background: rgba(255, 255, 255, 0.15); transform: translateY(-2px);}

.campus-showcase {padding: 0;}
.campus-image-large {position: relative; height: 500px; overflow: hidden; border-radius: 20px; box-shadow: var(--shadow-xl);}
.campus-image-large img {width: 100%; height: 100%; object-fit: cover;}
.campus-info-overlay {position: absolute; bottom: 0; left: 0; right: 0; background: linear-gradient(to top, rgba(0,0,0,0.9), transparent); padding: var(--spacing-lg); color: white;}
.campus-info-overlay h3 {font-size: 1.8rem; margin-bottom: 0.5rem;}
.campus-info-overlay p {font-size: 1.1rem; opacity: 0.9;}

.join-section {background: var(--bg-section);}
.join-card.featured {position: relative; border: 3px solid var(--secondary-color); box-shadow: var(--shadow-xl);}
.featured-badge {position: absolute; top: -15px; right: 20px; background: var(--accent-color); color: white; padding: 0.4rem 1.2rem; border-radius: 20px; font-size: 0.85rem; font-weight: 700; text-transform: uppercase; box-shadow: var(--shadow-md);}
.join-badge {display: inline-block; background: var(--gradient-primary); color: white; padding: 0.4rem 1rem; border-radius: 20px; font-size: 0.85rem; font-weight: 600; margin-bottom: var(--spacing-sm);}
.join-details {margin-top: var(--spacing-md); text-align: left;}
.join-details h4 {font-size: 1rem; color: var(--primary-color); margin-bottom: 0.5rem; font-weight: 600;}
.join-details ul {list-style: none; padding: 0;}
.join-details li {margin-bottom: 0.5rem; color: var(--text-secondary); display: flex; align-items: center; gap: 0.5rem;}
.join-details li i {color: var(--secondary-color);}

.opp-icon {width: 60px; height: 60px; background: var(--gradient-primary); border-radius: 50%; display: flex; align-items: center; justify-content: center; margin: 0 auto var(--spacing-sm); font-size: 1.5rem; color: white;}
.opportunity-card ul {margin-top: var(--spacing-sm);}

.contact-cta-box {background: white; padding: var(--spacing-xl); border-radius: 20px; box-shadow: var(--shadow-xl); text-align: center;}
.cta-icon {width: 100px; height: 100px; background: var(--gradient-primary); border-radius: 50%; display: flex; align-items: center; justify-content: center; margin: 0 auto var(--spacing-md); font-size: 3rem; color: white;}
.contact-cta-box h2 {color: var(--primary-color); margin-bottom: var(--spacing-sm);}
.cta-lead {font-size: 1.3rem; font-weight: 600; color: var(--text-primary); margin-bottom: var(--spacing-sm);}
.cta-description {color: var(--text-secondary); line-height: 1.8; margin-bottom: var(--spacing-md);}
.contact-buttons {display: flex; gap: var(--spacing-sm); justify-content: center; flex-wrap: wrap; margin: var(--spacing-md) 0;}
.contact-note {background: var(--bg-section); padding: var(--spacing-md); border-radius: 15px; margin-top: var(--spacing-md); display: inline-flex; align-items: start; gap: var(--spacing-sm); text-align: left;}
.contact-note i {color: var(--secondary-color); font-size: 1.2rem; flex-shrink: 0; margin-top: 0.2rem;}
.contact-note p {margin: 0; color: var(--text-secondary);}

.footer-address {margin-top: var(--spacing-sm);}
.footer-address p {display: flex; align-items: center; gap: 0.5rem; font-size: 0.9rem;}
.footer-credits {font-size: 0.85rem; margin-top: 0.5rem; opacity: 0.7;}

/* Responsive */
@media (max-width: 768px) {
    .nav-menu {position: fixed; top: 70px; left: -100%; width: 100%; height: calc(100vh - 70px); background: rgba(255, 255, 255, 0.98); backdrop-filter: blur(10px); flex-direction: column; justify-content: flex-start; padding: var(--spacing-lg) 0; transition: left var(--transition-normal); box-shadow: var(--shadow-lg);}
    .nav-menu.active {left: 0;}
    .mobile-menu-toggle {display: flex;}
    .mobile-menu-toggle.active span:nth-child(1) {transform: rotate(45deg) translate(8px, 8px);}
    .mobile-menu-toggle.active span:nth-child(2) {opacity: 0;}
    .mobile-menu-toggle.active span:nth-child(3) {transform: rotate(-45deg) translate(7px, -7px);}
    .about-content, .research-item, .research-item.reverse, .map-info, .location-content {grid-template-columns: 1fr;}
    .research-item.reverse .research-content, .research-item.reverse .research-image {order: 0;}
    .section {padding: var(--spacing-lg) 0;}
    .hero-cta, .cta-buttons, .contact-buttons {flex-direction: column; align-items: stretch;}
    .btn {width: 100%;}
    .campus-image-large {height: 300px;}
    .map-links {flex-direction: column;}
    .map-link {justify-content: center;}
}

@media (max-width: 480px) {
    :root {--spacing-lg: 3rem; --spacing-xl: 4rem;}
    .keywords-grid, .preview-grid, .project-details-grid, .join-cards-grid, .quick-contact-grid, .opportunities-grid {grid-template-columns: 1fr;}
}