/* Main variables and style reset */
:root {
    /* Color palette - Intermediate version */
    --bg-primary: #FFFFFF;
    --bg-secondary: #F6F8FF;           /* Slightly more blue than original */
    
    /* Primary colors - Intermediate */
    --primary-blue: #8A95E8;           /* Blend of original #919ac2 and current #7A8BFF */
    --primary-blue-light: #A3ADF0;     /* Light variant */
    --primary-blue-dark: #7A84D4;      /* Dark variant */
    
    /* Complementary colors - Intermediate */
    --accent-coral: #E87A5A;            /* Blend of original and current coral */
    --accent-coral-light: #F0957A;      /* Light accent */
    --accent-coral-dark: #D46542;       /* Dark accent */
    
    /* Neutral colors - Intermediate */
    --text-primary: #2A2A2A;           /* Slightly lighter than original #1A1A1A */
    --text-secondary: #555555;         /* Blend of original #4a4a4a and current */
    --text-light: #FFFFFF;
    --text-muted: #777777;             /* Intermediate muted color */
    
    /* Gradients - Intermediate */
    --gradient-primary: linear-gradient(135deg, #8A95E8 0%, #7A84D4 100%);
    --gradient-accent: linear-gradient(135deg, #E87A5A 0%, #D46542 100%);
    --gradient-hero: linear-gradient(135deg, #8A95E8 0%, #E87A5A 100%);
    
    /* Shadows and effects - Intermediate */
    --shadow-light: 0 2px 10px rgba(138, 149, 232, 0.15);
    --shadow-medium: 0 4px 20px rgba(138, 149, 232, 0.25);
    --shadow-heavy: 0 8px 30px rgba(138, 149, 232, 0.35);
    --shadow-coral: 0 4px 20px rgba(232, 122, 90, 0.3);
    --glass-bg: rgba(255, 255, 255, 0.15);
    --glass-border: rgba(255, 255, 255, 0.25);
    
    /* Animations */
    --transition-fast: 0.2s ease;
    --transition-medium: 0.3s ease;
    --transition-slow: 0.5s ease;
}

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

body {
    font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(143, 153, 251, 0.2);
    z-index: 1000;
    transition: var(--transition-medium);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
}

.logo-svg {
    color: var(--primary-blue);
    animation: logo-rotate 12s linear infinite;
}

.logo-svg circle,
.logo-svg line,
.logo-svg ellipse {
    transition: var(--transition-medium);
}

.nav-logo:hover .logo-svg {
    color: var(--accent-coral);
    animation: logo-pulse 3s ease-in-out infinite;
}

.nav-logo:hover .logo-svg line {
    animation: sun-rays 2s ease-in-out infinite;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 30px;
}

.nav-menu a {
    text-decoration: none;
    color: var(--text-primary);
    font-weight: 500;
    transition: var(--transition-fast);
    position: relative;
}

.nav-menu a:hover {
    color: var(--accent-coral);
}

.nav-menu a::after {
    content: "";
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-coral);
    transition: var(--transition-fast);
}

.nav-menu a:hover::after {
    width: 100%;
}

.nav-buttons {
    display: flex;
    gap: 15px;
}

/* Buttons */
.btn-primary, .btn-secondary, .btn-outline {
    padding: 12px 24px;
    border: none;
    border-radius: 8px;
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    transition: var(--transition-medium);
    display: inline-flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
}

.btn-primary {
    background: var(--gradient-primary);
    color: var(--text-light);
    box-shadow: var(--shadow-light);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-medium);
    box-shadow: 0 6px 20px rgba(143, 153, 251, 0.3);
}

.btn-secondary {
    background: var(--accent-coral);
    color: var(--text-light);
}

.btn-secondary:hover {
    background: var(--accent-coral-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-coral);
}

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

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

.btn-large {
    padding: 16px 32px;
    font-size: 1rem;
}

/* Hero section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    background: linear-gradient(135deg, var(--bg-primary) 0%, rgba(143, 153, 251, 0.05) 100%);
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 1;
}

.fusion-grid {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        linear-gradient(rgba(143, 153, 251, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(143, 153, 251, 0.03) 1px, transparent 1px);
    background-size: 50px 50px;
    animation: grid-move 20s linear infinite;
}

.plasma-orb {
    position: absolute;
    top: 20%;
    right: 10%;
    width: 200px;
    height: 200px;
    background: radial-gradient(circle, rgba(193, 142, 122, 0.1) 0%, transparent 70%);
    border-radius: 50%;
    animation: plasma-glow 4s ease-in-out infinite alternate;
}

.hero-content {
    position: relative;
    z-index: 2;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.hero-text h1 {
    font-size: 3.5rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 20px;
    color: var(--text-primary);
}

.highlight {
    background: var(--gradient-hero);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-text p {
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin-bottom: 30px;
    line-height: 1.6;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
}

.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.tokamak-schematic {
    position: relative;
    width: 300px;
    height: 300px;
}

.tokamak-ring {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 200px;
    height: 200px;
    border: 3px solid var(--primary-blue);
    border-radius: 50%;
    animation: rotate 10s linear infinite;
}

.plasma-flow {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 150px;
    height: 150px;
    border: 2px solid var(--accent-coral);
    border-radius: 50%;
    animation: pulse 3s ease-in-out infinite;
}

.magnetic-field {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 250px;
    height: 250px;
    border: 1px dashed var(--primary-blue-light);
    border-radius: 50%;
    animation: rotate 15s linear infinite reverse;
}

/* Statistics */
.stats {
    padding: 80px 0;
    background: var(--bg-secondary);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.stat-card {
    background: var(--text-light);
    padding: 40px 30px;
    border-radius: 16px;
    text-align: center;
    box-shadow: var(--shadow-light);
    transition: var(--transition-medium);
    border: 1px solid rgba(143, 153, 251, 0.1);
}

.stat-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-medium);
    border-color: var(--accent-coral-light);
}

.stat-icon {
    width: 60px;
    height: 60px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    color: var(--text-light);
    font-size: 1.5rem;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 10px;
}

.stat-label {
    color: var(--text-secondary);
    font-weight: 500;
}

/* Sections */
.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-header h2 {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 15px;
}

.section-header p {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* Projects */
.projects {
    padding: 100px 0;
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
}

.project-card {
    background: var(--text-light);
    border-radius: 16px;
    overflow: hidden;
    box-shadow: var(--shadow-light);
    transition: var(--transition-medium);
    border: 1px solid rgba(143, 153, 251, 0.1);
}

.project-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-medium);
    border-color: var(--accent-coral-light);
}

.project-image {
    height: 200px;
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.project-icon {
    width: 80px;
    height: 80px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-light);
    font-size: 2rem;
    backdrop-filter: blur(10px);
}

.project-content {
    padding: 30px;
}

.project-content h3 {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 10px;
}

.project-content p {
    color: var(--text-secondary);
    margin-bottom: 20px;
    line-height: 1.6;
}

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

.project-category {
    background: var(--accent-coral-light);
    color: var(--accent-coral-dark);
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
}

.project-members {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Experts */
.experts {
    padding: 100px 0;
    background: var(--bg-secondary);
}

.experts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.expert-card {
    background: var(--text-light);
    padding: 30px;
    border-radius: 16px;
    box-shadow: var(--shadow-light);
    transition: var(--transition-medium);
    border: 1px solid rgba(142, 153, 193, 0.1);
    display: flex;
    align-items: center;
    gap: 20px;
}

.expert-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-medium);
    border-color: var(--accent-coral-light);
}

.expert-avatar {
    flex-shrink: 0;
}

.avatar-placeholder {
    width: 80px;
    height: 80px;
    background: var(--gradient-accent);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-light);
    font-size: 2rem;
}

.expert-info h3 {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 5px;
}

.expert-title {
    color: var(--accent-coral);
    font-weight: 500;
    margin-bottom: 5px;
}

.expert-org {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 15px;
}

.expert-tags {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.tag {
    background: var(--primary-blue-light);
    color: var(--primary-blue-dark);
    padding: 4px 8px;
    border-radius: 12px;
    font-size: 0.8rem;
    font-weight: 500;
}

/* About */
.about {
    padding: 100px 0;
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-text h2 {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 20px;
}

.about-text p {
    font-size: 1.1rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 30px;
}

.about-features {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.feature {
    display: flex;
    align-items: center;
    gap: 15px;
    font-weight: 500;
    color: var(--text-primary);
}

.feature i {
    color: var(--accent-coral);
    font-size: 1.2rem;
}

.about-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.fusion-animation {
    position: relative;
    width: 300px;
    height: 300px;
}

.particle {
    position: absolute;
    width: 8px;
    height: 8px;
    background: var(--primary-blue);
    border-radius: 50%;
    animation: particle-float 4s ease-in-out infinite;
}

.particle-1 {
    top: 20%;
    left: 20%;
    animation-delay: 0s;
}

.particle-2 {
    top: 60%;
    right: 30%;
    animation-delay: 1.3s;
    background: var(--accent-coral);
}

.particle-3 {
    bottom: 20%;
    left: 50%;
    animation-delay: 2.6s;
    background: var(--primary-blue-light);
}

/* CTA section */
.cta {
    padding: 100px 0;
    background: var(--gradient-hero);
    text-align: center;
}

.cta-content h2 {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-light);
    margin-bottom: 20px;
}

.cta-content p {
    font-size: 1.2rem;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 40px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* Footer */
.footer {
    background: var(--primary-blue-dark);
    color: var(--text-light);
    padding: 60px 0 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 15px;
}

.footer-logo .logo-svg {
    color: var(--accent-coral);
    animation: logo-rotate 12s linear infinite;
}

.footer-section h3 {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 20px;
    color: var(--text-light);
}

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

.footer-section ul li {
    margin-bottom: 10px;
}

.footer-section ul li a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: var(--transition-fast);
}

.footer-section ul li a:hover {
    color: var(--accent-coral);
}

.social-links {
    display: flex;
    gap: 15px;
    margin-top: 20px;
}

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

.social-links a:hover {
    background: var(--accent-coral);
    transform: translateY(-2px);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 20px;
    text-align: center;
    color: rgba(255, 255, 255, 0.6);
}

/* Animations */
@keyframes pulse {
    0%, 100% {
        transform: scale(1);
        opacity: 1;
    }
    50% {
        transform: scale(1.05);
        opacity: 0.8;
    }
}

@keyframes rotate {
    from {
        transform: translate(-50%, -50%) rotate(0deg);
    }
    to {
        transform: translate(-50%, -50%) rotate(360deg);
    }
}

@keyframes plasma-glow {
    0% {
        opacity: 0.3;
        transform: scale(1);
    }
    100% {
        opacity: 0.6;
        transform: scale(1.1);
    }
}

@keyframes grid-move {
    0% {
        transform: translate(0, 0);
    }
    100% {
        transform: translate(50px, 50px);
    }
}

@keyframes particle-float {
    0%, 100% {
        transform: translateY(0px);
        opacity: 0.7;
    }
    50% {
        transform: translateY(-20px);
        opacity: 1;
    }
}

@keyframes logo-rotate {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

@keyframes logo-pulse {
    0%, 100% {
        transform: scale(1) rotate(0deg);
    }
    50% {
        transform: scale(1.1) rotate(180deg);
    }
}

@keyframes sun-rays {
    0%, 100% {
        opacity: 0.8;
        stroke-width: 1.5;
    }
    50% {
        opacity: 1;
        stroke-width: 2;
    }
}

/* Responsive Modal */
@media (max-width: 768px) {
    .modal-content {
        width: 95%;
        margin: 5% auto;
        max-height: 95vh;
    }
    
    .modal-header {
        padding: 20px 25px;
    }
    
    .modal-header h2 {
        font-size: 1.5rem;
    }
    
    .profile-type-selection,
    .registration-forms {
        padding: 25px;
    }
    
    .profile-types-grid {
        grid-template-columns: 1fr;
    }
    
    .form-actions {
        flex-direction: column;
    }
    
    .form-actions button {
        width: 100%;
    }
}

@media (max-width: 480px) {
    .modal-content {
        width: 98%;
        margin: 2% auto;
    }
    
    .modal-header {
        padding: 15px 20px;
    }
    
    .profile-type-selection,
    .registration-forms {
        padding: 20px;
    }
}

/* Collaboration Boards / Topic Hubs */
.collaboration {
    padding: 100px 0;
    background: var(--bg-secondary);
}

.topic-hubs-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.topic-hub-card {
    background: var(--text-light);
    padding: 30px;
    border-radius: 16px;
    text-align: center;
    box-shadow: var(--shadow-light);
    transition: var(--transition-medium);
    border: 1px solid rgba(142, 153, 193, 0.1);
}

.topic-hub-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-medium);
    border-color: var(--accent-coral-light);
}

.hub-icon {
    width: 80px;
    height: 80px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    color: var(--text-light);
    font-size: 2rem;
}

.topic-hub-card h3 {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 15px;
}

.topic-hub-card p {
    color: var(--text-secondary);
    margin-bottom: 20px;
    line-height: 1.6;
}

.hub-stats {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-bottom: 25px;
    font-size: 0.9rem;
    color: var(--text-muted);
}

.hub-stats span {
    display: flex;
    align-items: center;
    gap: 5px;
}

/* Project Opportunities */
.opportunities {
    padding: 100px 0;
}

.opportunities-tabs {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.tab-btn {
    padding: 12px 24px;
    border: 2px solid var(--primary-blue);
    background: transparent;
    color: var(--primary-blue);
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-fast);
}

.tab-btn.active,
.tab-btn:hover {
    background: var(--primary-blue);
    color: var(--text-light);
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

.opportunities-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
}

.opportunity-card {
    background: var(--text-light);
    border-radius: 16px;
    padding: 25px;
    box-shadow: var(--shadow-light);
    transition: var(--transition-medium);
    border: 1px solid rgba(142, 153, 193, 0.1);
}

.opportunity-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-medium);
    border-color: var(--accent-coral-light);
}

.opportunity-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
}

.opportunity-type {
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
}

.opportunity-type.freelance {
    background: rgba(143, 153, 251, 0.2);
    color: var(--primary-blue-dark);
}

.opportunity-type.tender {
    background: rgba(231, 111, 81, 0.2);
    color: var(--accent-coral-dark);
}

.opportunity-type.collaboration {
    background: rgba(76, 175, 80, 0.2);
    color: #2e7d32;
}

.opportunity-type.funding {
    background: rgba(255, 193, 7, 0.2);
    color: #f57c00;
}

.opportunity-budget {
    font-weight: 600;
    color: var(--text-primary);
}

.opportunity-card h3 {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 10px;
}

.opportunity-card p {
    color: var(--text-secondary);
    margin-bottom: 15px;
    line-height: 1.6;
}

.opportunity-tags {
    display: flex;
    gap: 8px;
    margin-bottom: 15px;
    flex-wrap: wrap;
}

.opportunity-meta {
    display: flex;
    gap: 20px;
    margin-bottom: 20px;
    font-size: 0.9rem;
    color: var(--text-muted);
}

.opportunity-meta span {
    display: flex;
    align-items: center;
    gap: 5px;
}

/* Messaging & Discussions */
.messaging {
    padding: 100px 0;
    background: var(--bg-secondary);
}

/* Discussion Tabs */
.discussion-tabs {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.discussion-tabs .tab-btn {
    padding: 12px 24px;
    border: 2px solid var(--primary-blue);
    background: transparent;
    color: var(--primary-blue);
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-fast);
}

.discussion-tabs .tab-btn.active,
.discussion-tabs .tab-btn:hover {
    background: var(--primary-blue);
    color: var(--text-light);
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

.messaging-container {
    display: grid;
    grid-template-columns: 350px 1fr;
    gap: 30px;
    background: var(--text-light);
    border-radius: 16px;
    box-shadow: var(--shadow-light);
    overflow: hidden;
    height: 600px;
}

.discussions-sidebar {
    background: var(--bg-secondary);
    border-right: 1px solid rgba(143, 153, 251, 0.2);
}

.discussions-header {
    padding: 20px;
    border-bottom: 1px solid rgba(142, 153, 193, 0.2);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.discussions-header h3 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.btn-small {
    padding: 8px 16px;
    font-size: 0.8rem;
}

/* Discussion Categories */
.discussion-categories {
    padding: 15px 20px;
    border-bottom: 1px solid rgba(142, 153, 193, 0.2);
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.category-filter {
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition-fast);
    background: rgba(142, 153, 193, 0.1);
    color: var(--text-secondary);
}

.category-filter.active,
.category-filter:hover {
    background: var(--primary-blue);
    color: var(--text-light);
}

.discussion-list {
    overflow-y: auto;
    height: calc(100% - 140px);
}

.discussion-item {
    padding: 15px 20px;
    border-bottom: 1px solid rgba(142, 153, 193, 0.1);
    cursor: pointer;
    transition: var(--transition-fast);
    display: flex;
    gap: 15px;
    position: relative;
}

.discussion-item:hover,
.discussion-item.active {
    background: rgba(143, 153, 251, 0.1);
}

.discussion-avatar {
    width: 40px;
    height: 40px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-light);
    flex-shrink: 0;
}

.discussion-avatar.group {
    background: var(--gradient-accent);
}

.discussion-category-badge {
    position: absolute;
    top: 10px;
    right: 15px;
    padding: 2px 8px;
    border-radius: 12px;
    font-size: 0.7rem;
    font-weight: 500;
    text-transform: uppercase;
}

.discussion-category-badge.technical {
    background: rgba(143, 153, 251, 0.2);
    color: var(--primary-blue-dark);
}

.discussion-category-badge.research {
    background: rgba(231, 111, 81, 0.2);
    color: var(--accent-coral-dark);
}

.discussion-category-badge.industry {
    background: rgba(76, 175, 80, 0.2);
    color: #2e7d32;
}

.discussion-category-badge.general {
    background: rgba(255, 193, 7, 0.2);
    color: #f57c00;
}

.discussion-content h4 {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 5px;
}

.discussion-content p {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 5px;
    line-height: 1.4;
}

.discussion-meta {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.chat-main {
    display: flex;
    flex-direction: column;
}

.chat-header {
    padding: 20px;
    border-bottom: 1px solid rgba(143, 153, 251, 0.2);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.chat-header h3 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.chat-header-actions {
    display: flex;
    align-items: center;
    gap: 10px;
}

.chat-participants {
    font-size: 0.9rem;
    color: var(--text-muted);
}

.chat-messages {
    flex: 1;
    padding: 20px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.message {
    display: flex;
    gap: 15px;
}

.message-avatar {
    width: 40px;
    height: 40px;
    background: var(--gradient-accent);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-light);
    flex-shrink: 0;
}

.message-content {
    flex: 1;
}

.message-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 5px;
}

.message-author {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 0.9rem;
}

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

.message-content p {
    color: var(--text-secondary);
    line-height: 1.5;
}

.message-link {
    color: var(--primary-blue);
    text-decoration: none;
    font-weight: 500;
}

.message-link:hover {
    text-decoration: underline;
}

.message-actions {
    display: flex;
    gap: 15px;
    margin-top: 10px;
}

.message-action {
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 0.8rem;
    cursor: pointer;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    gap: 5px;
    padding: 5px 10px;
    border-radius: 15px;
}

.message-action:hover {
    background: rgba(142, 153, 193, 0.1);
    color: var(--primary-blue);
}

.chat-input {
    padding: 20px;
    border-top: 1px solid rgba(142, 153, 193, 0.2);
    display: flex;
    gap: 15px;
    align-items: flex-end;
}

.chat-input textarea {
    flex: 1;
    padding: 12px;
    border: 2px solid rgba(142, 153, 193, 0.2);
    border-radius: 8px;
    resize: none;
    height: 60px;
    font-family: inherit;
    transition: var(--transition-fast);
}

.chat-input textarea:focus {
    outline: none;
    border-color: var(--primary-blue);
}

.chat-input-actions {
    display: flex;
    gap: 10px;
    align-items: center;
}

/* Events & Calendar */
.events {
    padding: 100px 0;
}

.events-container {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 40px;
}

.events-calendar {
    background: var(--text-light);
    border-radius: 16px;
    padding: 30px;
    box-shadow: var(--shadow-light);
}

.calendar-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
}

.calendar-header h3 {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--text-primary);
}

.calendar-nav {
    display: flex;
    gap: 10px;
}

.event-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.event-item {
    display: flex;
    gap: 20px;
    padding: 20px;
    border: 1px solid rgba(142, 153, 193, 0.1);
    border-radius: 12px;
    transition: var(--transition-fast);
}

.event-item:hover {
    border-color: var(--accent-coral-light);
    box-shadow: var(--shadow-light);
}

.event-date {
    text-align: center;
    flex-shrink: 0;
}

.event-day {
    display: block;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-blue);
}

.event-month {
    display: block;
    font-size: 0.9rem;
    color: var(--text-muted);
    text-transform: uppercase;
}

.event-details {
    flex: 1;
}

.event-details h4 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 5px;
}

.event-details p {
    color: var(--text-secondary);
    margin-bottom: 10px;
    line-height: 1.5;
}

.event-location,
.event-deadline {
    font-size: 0.9rem;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 5px;
}

.events-sidebar {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.funding-opportunities {
    background: var(--text-light);
    border-radius: 16px;
    padding: 30px;
    box-shadow: var(--shadow-light);
}

.funding-opportunities h3 {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 20px;
}

.funding-item {
    padding: 20px;
    border: 1px solid rgba(142, 153, 193, 0.1);
    border-radius: 12px;
    margin-bottom: 20px;
    transition: var(--transition-fast);
}

.funding-item:hover {
    border-color: var(--accent-coral-light);
    box-shadow: var(--shadow-light);
}

.funding-item h4 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.funding-item p {
    color: var(--text-secondary);
    margin-bottom: 10px;
    line-height: 1.5;
}

.funding-deadline {
    display: block;
    font-size: 0.9rem;
    color: var(--accent-coral);
    font-weight: 500;
    margin-bottom: 15px;
}

/* Knowledge Base */
.knowledge {
    padding: 100px 0;
    background: var(--bg-secondary);
}

.knowledge-container {
    display: flex;
    flex-direction: column;
    gap: 40px;
}

.knowledge-search {
    display: flex;
    justify-content: center;
}

.search-box {
    display: flex;
    align-items: center;
    background: var(--text-light);
    border-radius: 12px;
    padding: 5px;
    box-shadow: var(--shadow-light);
    width: 100%;
    max-width: 600px;
}

.search-box i {
    color: var(--text-muted);
    margin: 0 15px;
}

.search-box input {
    flex: 1;
    border: none;
    padding: 15px 0;
    font-size: 1rem;
    background: transparent;
    color: var(--text-primary);
}

.search-box input:focus {
    outline: none;
}

.search-box button {
    margin-left: 10px;
}

.knowledge-categories {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.category-card {
    background: var(--text-light);
    padding: 30px;
    border-radius: 16px;
    text-align: center;
    box-shadow: var(--shadow-light);
    transition: var(--transition-medium);
    border: 1px solid rgba(142, 153, 193, 0.1);
}

.category-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-medium);
    border-color: var(--accent-coral-light);
}

.category-icon {
    width: 70px;
    height: 70px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    color: var(--text-light);
    font-size: 1.5rem;
}

.category-card h3 {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 10px;
}

.category-card p {
    color: var(--text-secondary);
    margin-bottom: 15px;
    line-height: 1.5;
}

.doc-count {
    display: block;
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-bottom: 20px;
}

.recent-documents {
    background: var(--text-light);
    border-radius: 16px;
    padding: 30px;
    box-shadow: var(--shadow-light);
}

.recent-documents h3 {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 25px;
}

.document-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.document-item {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 20px;
    border: 1px solid rgba(142, 153, 193, 0.1);
    border-radius: 12px;
    transition: var(--transition-fast);
}

.document-item:hover {
    border-color: var(--accent-coral-light);
    box-shadow: var(--shadow-light);
}

.document-icon {
    width: 50px;
    height: 50px;
    background: var(--gradient-accent);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-light);
    font-size: 1.2rem;
    flex-shrink: 0;
}

.document-info {
    flex: 1;
}

.document-info h4 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 5px;
}

.document-info p {
    color: var(--text-secondary);
    margin-bottom: 5px;
    line-height: 1.4;
}

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

/* Responsive styles for new sections */
@media (max-width: 768px) {
    .topic-hubs-grid {
        grid-template-columns: 1fr;
    }
    
    .opportunities-tabs {
        flex-direction: column;
        align-items: center;
    }
    
    .opportunities-grid {
        grid-template-columns: 1fr;
    }
    
    .discussion-tabs {
        flex-direction: column;
        align-items: center;
    }
    
    .discussion-categories {
        justify-content: center;
    }
    
    .messaging-container {
        grid-template-columns: 1fr;
        height: auto;
    }
    
    .discussions-sidebar {
        border-right: none;
        border-bottom: 1px solid rgba(142, 153, 193, 0.2);
    }
    
    .chat-header-actions {
        flex-direction: column;
        gap: 5px;
    }
    
    .message-actions {
        flex-direction: column;
        gap: 5px;
    }
    
    .events-container {
        grid-template-columns: 1fr;
    }
    
    .knowledge-categories {
        grid-template-columns: 1fr;
    }
    
    .document-item {
        flex-direction: column;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .opportunities-tabs {
        gap: 5px;
    }
    
    .tab-btn {
        padding: 10px 16px;
        font-size: 0.8rem;
    }
    
    .event-item {
        flex-direction: column;
        text-align: center;
    }
    
    .search-box {
        flex-direction: column;
        gap: 10px;
    }
    
    .search-box input {
        width: 100%;
    }
} 

/* Responsiveness */
@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }
    
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 40px;
    }
    
    .hero-text h1 {
        font-size: 2.5rem;
    }
    
    .about-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .projects-grid {
        grid-template-columns: 1fr;
    }
    
    .experts-grid {
        grid-template-columns: 1fr;
    }
    
    .expert-card {
        flex-direction: column;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .hero-text h1 {
        font-size: 2rem;
    }
    
    .section-header h2 {
        font-size: 2rem;
    }
}

/* Registration Modal Styles */
.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(5px);
    animation: fadeIn 0.3s ease;
}

.modal-content {
    background: var(--bg-primary);
    margin: 2% auto;
    padding: 0;
    border-radius: 16px;
    width: 90%;
    max-width: 800px;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-heavy);
    animation: slideIn 0.3s ease;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 30px 40px;
    border-bottom: 1px solid rgba(142, 153, 193, 0.2);
    background: var(--gradient-primary);
    color: var(--text-light);
    border-radius: 16px 16px 0 0;
}

.modal-header h2 {
    font-size: 1.8rem;
    font-weight: 700;
    margin: 0;
}

.close {
    color: var(--text-light);
    font-size: 2rem;
    font-weight: bold;
    cursor: pointer;
    transition: var(--transition-fast);
}

.close:hover {
    opacity: 0.7;
    transform: scale(1.1);
}

/* Profile Type Selection */
.profile-type-selection {
    padding: 40px;
}

.profile-type-selection h3 {
    text-align: center;
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 30px;
}

.profile-types-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
}

.profile-type-card {
    background: var(--text-light);
    border: 2px solid rgba(142, 153, 193, 0.1);
    border-radius: 12px;
    padding: 25px;
    text-align: center;
    cursor: pointer;
    transition: var(--transition-medium);
    box-shadow: var(--shadow-light);
}

.profile-type-card:hover {
    border-color: var(--primary-blue);
    transform: translateY(-3px);
    box-shadow: var(--shadow-medium);
}

.profile-type-card.selected {
    border-color: var(--accent-coral);
    background: rgba(255, 107, 107, 0.05);
    box-shadow: var(--shadow-coral);
}

.profile-type-icon {
    width: 60px;
    height: 60px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 15px;
    color: var(--text-light);
    font-size: 1.5rem;
}

.profile-type-card h4 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.profile-type-card p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.4;
}

/* Registration Forms */
.registration-forms {
    padding: 40px;
}

.registration-form h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 25px;
    text-align: center;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 8px;
    font-size: 0.9rem;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid rgba(142, 153, 193, 0.2);
    border-radius: 8px;
    font-size: 0.95rem;
    transition: var(--transition-fast);
    background: var(--text-light);
    color: var(--text-primary);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-blue);
    box-shadow: 0 0 0 3px rgba(74, 144, 226, 0.1);
}

.form-group select[multiple] {
    height: 120px;
}

.form-group textarea {
    resize: vertical;
    min-height: 100px;
}

.form-actions {
    display: flex;
    gap: 15px;
    justify-content: center;
    margin-top: 30px;
    padding-top: 20px;
    border-top: 1px solid rgba(142, 153, 193, 0.2);
}

.form-actions button {
    min-width: 120px;
}

/* Form Validation Styles */
.form-group input:invalid,
.form-group select:invalid,
.form-group textarea:invalid {
    border-color: var(--accent-coral);
}

.form-group input:valid,
.form-group select:valid,
.form-group textarea:valid {
    border-color: rgba(142, 153, 193, 0.2);
}

/* Success Message */
.success-message {
    text-align: center;
    padding: 40px;
}

.success-message i {
    font-size: 4rem;
    color: #4CAF50;
    margin-bottom: 20px;
}

.success-message h3 {
    font-size: 1.5rem;
    color: var(--text-primary);
    margin-bottom: 10px;
}

.success-message p {
    color: var(--text-secondary);
    margin-bottom: 20px;
}

/* Modal Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

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

/* ===== MOBILE RESPONSIVENESS ===== */

/* Tablet Styles */
@media (max-width: 1024px) {
    .container {
        padding: 0 15px;
    }
    
    .hero-content {
        grid-template-columns: 1fr;
        gap: 40px;
        text-align: center;
    }
    
    .hero-text h1 {
        font-size: 2.5rem;
    }
    
    .projects-grid {
        grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    }
    
    .topic-hubs-grid {
        grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    }
    
    .experts-grid {
        grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    }
    
    .footer-content {
        grid-template-columns: repeat(2, 1fr);
        gap: 30px;
    }
}

/* Mobile Styles */
@media (max-width: 768px) {
    /* Navigation */
    .nav-container {
        padding: 0 15px;
        height: 60px;
    }
    
    .nav-logo {
        font-size: 1.3rem;
    }
    
    .nav-logo .logo-svg {
        width: 28px;
        height: 28px;
    }
    
    .nav-menu {
        display: none;
        position: fixed;
        top: 60px;
        left: 0;
        right: 0;
        background: rgba(255, 255, 255, 0.98);
        backdrop-filter: blur(20px);
        flex-direction: column;
        padding: 20px;
        border-bottom: 1px solid rgba(138, 149, 232, 0.2);
        gap: 15px;
    }
    
    .nav-menu.active {
        display: flex;
    }
    
    .nav-menu a {
        padding: 12px 0;
        border-bottom: 1px solid rgba(138, 149, 232, 0.1);
    }
    
    .nav-menu a:last-child {
        border-bottom: none;
    }
    
    .nav-buttons {
        gap: 10px;
    }
    
    .btn-primary, .btn-secondary, .btn-outline {
        padding: 10px 16px;
        font-size: 0.85rem;
    }
    
    /* Mobile Menu Toggle */
    .mobile-menu-toggle {
        display: block !important;
        background: none;
        border: none;
        font-size: 1.5rem;
        color: var(--text-primary);
        cursor: pointer;
        padding: 5px;
        z-index: 1001;
    }
    
    /* Hero Section */
    .hero {
        padding: 120px 0 60px;
        min-height: 80vh;
    }
    
    .hero-text h1 {
        font-size: 2rem;
        line-height: 1.2;
    }
    
    .hero-text p {
        font-size: 1rem;
        margin-bottom: 25px;
    }
    
    .hero-buttons {
        flex-direction: column;
        gap: 15px;
        align-items: center;
    }
    
    .btn-large {
        width: 100%;
        max-width: 280px;
    }
    
    /* Ensure hero content is properly positioned */
    .hero-content {
        position: relative;
        z-index: 2;
    }
    
    .hero-text {
        position: relative;
        z-index: 3;
    }
    
    /* Statistics */
    .stats {
        padding: 60px 0;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }
    
    .stat-card {
        padding: 25px 20px;
    }
    
    .stat-number {
        font-size: 2rem;
    }
    
    /* Sections */
    .section-header h2 {
        font-size: 2rem;
    }
    
    .section-header p {
        font-size: 1rem;
    }
    
    .projects, .collaboration, .opportunities, .messaging, .events, .knowledge, .experts, .about {
        padding: 60px 0;
    }
    
    /* Projects */
    .projects-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    /* Topic Hubs */
    .topic-hubs-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .topic-hub-card {
        padding: 25px 20px;
    }
    
    /* Opportunities */
    .opportunities-tabs {
        flex-wrap: wrap;
        gap: 8px;
    }
    
    .tab-btn {
        padding: 10px 16px;
        font-size: 0.85rem;
    }
    
    .opportunities-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    /* Messaging */
    .messaging-container {
        flex-direction: column;
        height: 600px;
    }
    
    .discussions-sidebar {
        width: 100%;
        height: 200px;
        border-right: none;
        border-bottom: 1px solid rgba(138, 149, 232, 0.2);
    }
    
    .chat-main {
        flex: 1;
    }
    
    .discussion-list {
        max-height: 150px;
    }
    
    /* Events */
    .events-container {
        flex-direction: column;
        gap: 30px;
    }
    
    .events-calendar {
        width: 100%;
    }
    
    .events-sidebar {
        width: 100%;
    }
    
    /* Knowledge */
    .knowledge-categories {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .category-card {
        padding: 25px 20px;
    }
    
    /* Experts */
    .experts-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    /* Footer */
    .footer-content {
        grid-template-columns: 1fr;
        gap: 30px;
        text-align: center;
    }
    
    .footer-logo {
        justify-content: center;
    }
    
    .social-links {
        justify-content: center;
    }
}

/* Small Mobile Styles */
@media (max-width: 480px) {
    .container {
        padding: 0 10px;
    }
    
    .nav-container {
        padding: 0 10px;
    }
    
    .hero-text h1 {
        font-size: 1.8rem;
    }
    
    .hero-text p {
        font-size: 0.95rem;
    }
    
    /* Ensure hero section has proper spacing on small mobile */
    .hero {
        padding: 100px 0 40px;
        min-height: 70vh;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
        gap: 15px;
    }
    
    .stat-card {
        padding: 20px 15px;
    }
    
    .stat-number {
        font-size: 1.8rem;
    }
    
    .section-header h2 {
        font-size: 1.8rem;
    }
    
    .section-header p {
        font-size: 0.95rem;
    }
    
    .projects, .collaboration, .opportunities, .messaging, .events, .knowledge, .experts, .about {
        padding: 40px 0;
    }
    
    .topic-hub-card, .project-card, .opportunity-card, .category-card, .expert-card {
        padding: 20px 15px;
    }
    
    .hub-icon {
        width: 60px;
        height: 60px;
        font-size: 1.5rem;
    }
    
    .btn-primary, .btn-secondary, .btn-outline {
        padding: 12px 20px;
        font-size: 0.9rem;
    }
    
    .modal-content {
        width: 98%;
        margin: 2% auto;
        max-height: 98vh;
    }
    
    .modal-header {
        padding: 15px 20px;
    }
    
    .profile-type-selection,
    .registration-forms {
        padding: 20px;
    }
    
    .profile-types-grid {
        grid-template-columns: 1fr;
        gap: 15px;
    }
    
    .profile-type-card {
        padding: 20px 15px;
    }
    
    .form-actions {
        flex-direction: column;
        gap: 10px;
    }
    
    .form-actions button {
        width: 100%;
    }
}

/* Landscape Mobile */
@media (max-width: 768px) and (orientation: landscape) {
    .hero {
        min-height: 60vh;
        padding: 60px 0 40px;
    }
    
    .hero-text h1 {
        font-size: 1.8rem;
    }
    
    .messaging-container {
        height: 400px;
    }
    
    .discussions-sidebar {
        height: 150px;
    }
}

/* High DPI Displays */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
    .logo-svg {
        shape-rendering: geometricPrecision;
    }
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    .logo-svg {
        animation: none;
    }
}