/* ============================================
   BioMed Bengal - Design System
   Biomedical Engineering Community Website
   ============================================ */

/* CSS Variables - Alpine Frost + Medical Accents */
:root {
    /* Primary Colors */
    --color-primary: #2E5090;
    --color-primary-dark: #1A365D;
    --color-primary-light: #4A7FC1;
    --color-accent: #00B4D8;
    --color-accent-light: #90E0EF;
    
    /* Secondary Colors */
    --color-teal: #2A9D8F;
    --color-coral: #E76F51;
    --color-gold: #D4A574;
    
    /* Neutrals */
    --color-bg: #0A1929;
    --color-bg-light: #0D2137;
    --color-bg-card: #132B45;
    --color-text: #E3EDF7;
    --color-text-muted: #8FA3B0;
    --color-border: #1E3A5F;
    
    /* Typography */
    --font-display: 'Playfair Display', Georgia, serif;
    --font-body: 'Plus Jakarta Sans', system-ui, sans-serif;
    
    /* Spacing */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2.5rem;
    --space-xl: 4rem;
    --space-2xl: 6rem;
    --space-3xl: 8rem;
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* Reset & Base */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

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

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

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

a {
    color: inherit;
    text-decoration: none;
}

ul {
    list-style: none;
}

/* Container */
.container {
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

/* ============================================
   Navigation
   ============================================ */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: var(--space-md) 0;
    transition: var(--transition-base);
}

.nav.scrolled {
    background: rgba(10, 25, 41, 0.95);
    backdrop-filter: blur(20px);
    padding: var(--space-sm) 0;
    border-bottom: 1px solid var(--color-border);
}

.nav-container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--color-text);
}

.logo-icon {
    font-size: 1.75rem;
    color: var(--color-accent);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
}

.nav-links a {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--color-text-muted);
    transition: var(--transition-fast);
    position: relative;
}

.nav-links a:hover {
    color: var(--color-text);
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-accent);
    transition: var(--transition-base);
}

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

.nav-cta {
    background: var(--color-accent);
    color: var(--color-bg) !important;
    padding: var(--space-xs) var(--space-md);
    border-radius: var(--radius-md);
    font-weight: 600 !important;
}

.nav-cta::after {
    display: none !important;
}

.nav-cta:hover {
    background: var(--color-accent-light);
    transform: translateY(-2px);
}

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

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-text);
    transition: var(--transition-base);
}

/* ============================================
   Hero Section
   ============================================ */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    padding: calc(var(--space-3xl) + 80px) 0 var(--space-3xl);
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    z-index: 0;
}

.hero-grid {
    position: absolute;
    inset: 0;
    background-image: 
        linear-gradient(rgba(46, 80, 144, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(46, 80, 144, 0.03) 1px, transparent 1px);
    background-size: 60px 60px;
}

.hero-glow {
    position: absolute;
    top: 20%;
    right: 10%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(0, 180, 216, 0.15) 0%, transparent 70%);
    filter: blur(60px);
    animation: pulse-glow 4s ease-in-out infinite;
}

@keyframes pulse-glow {
    0%, 100% { opacity: 0.5; transform: scale(1); }
    50% { opacity: 0.8; transform: scale(1.1); }
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
    width: 100%;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    background: rgba(0, 180, 216, 0.1);
    border: 1px solid var(--color-accent);
    padding: var(--space-xs) var(--space-md);
    border-radius: 100px;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-accent);
    margin-bottom: var(--space-lg);
}

.badge-dot {
    width: 8px;
    height: 8px;
    background: var(--color-accent);
    border-radius: 50%;
    animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.hero-title {
    font-family: var(--font-display);
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 600;
    line-height: 1.1;
    margin-bottom: var(--space-md);
    max-width: 800px;
}

.title-highlight {
    background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-light) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--color-text-muted);
    max-width: 600px;
    margin-bottom: var(--space-xl);
    line-height: 1.7;
}

.hero-actions {
    display: flex;
    gap: var(--space-md);
    margin-bottom: var(--space-2xl);
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    padding: var(--space-sm) var(--space-lg);
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 1rem;
    transition: var(--transition-base);
    border: none;
    cursor: pointer;
}

.btn-primary {
    background: var(--color-accent);
    color: var(--color-bg);
}

.btn-primary:hover {
    background: var(--color-accent-light);
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(0, 180, 216, 0.3);
}

.btn-secondary {
    background: transparent;
    color: var(--color-text);
    border: 1px solid var(--color-border);
}

.btn-secondary:hover {
    background: var(--color-bg-card);
    border-color: var(--color-accent);
}

.btn-outline {
    background: transparent;
    color: var(--color-accent);
    border: 1px solid var(--color-accent);
}

.btn-outline:hover {
    background: var(--color-accent);
    color: var(--color-bg);
}

.btn-small {
    padding: var(--space-xs) var(--space-md);
    font-size: 0.875rem;
}

.hero-stats {
    display: flex;
    gap: var(--space-2xl);
    flex-wrap: wrap;
}

.stat {
    display: flex;
    flex-direction: column;
}

.stat-number {
    font-family: var(--font-display);
    font-size: 2.5rem;
    font-weight: 600;
    color: var(--color-accent);
    line-height: 1;
}

.stat-label {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    margin-top: var(--space-xs);
}

/* Hero Visual - DNA Animation */
.hero-visual {
    position: absolute;
    right: 5%;
    top: 50%;
    transform: translateY(-50%);
    width: 400px;
    height: 400px;
    z-index: 0;
    opacity: 0.6;
}

.dna-animation {
    position: relative;
    width: 100%;
    height: 100%;
}

.dna-strand {
    position: absolute;
    width: 4px;
    height: 100%;
    background: linear-gradient(to bottom, transparent, var(--color-accent), transparent);
    left: 50%;
    transform-origin: center;
    animation: rotate-strand 8s linear infinite;
}

.strand-1 {
    transform: translateX(-20px) rotateY(0deg);
    animation-delay: 0s;
}

.strand-2 {
    transform: translateX(0) rotateY(120deg);
    animation-delay: -2.67s;
}

.strand-3 {
    transform: translateX(20px) rotateY(240deg);
    animation-delay: -5.33s;
}

@keyframes rotate-strand {
    from { transform: translateX(var(--tx, 0)) rotateY(0deg); }
    to { transform: translateX(var(--tx, 0)) rotateY(360deg); }
}

.floating-shapes {
    position: absolute;
    inset: 0;
}

.shape {
    position: absolute;
    border-radius: 50%;
    background: var(--color-accent);
    opacity: 0.1;
    animation: float 6s ease-in-out infinite;
}

.shape-1 {
    width: 80px;
    height: 80px;
    top: 20%;
    left: 10%;
    animation-delay: 0s;
}

.shape-2 {
    width: 40px;
    height: 40px;
    top: 60%;
    right: 20%;
    animation-delay: -2s;
}

.shape-3 {
    width: 60px;
    height: 60px;
    bottom: 20%;
    left: 30%;
    animation-delay: -4s;
}

@keyframes float {
    0%, 100% { transform: translateY(0) scale(1); }
    50% { transform: translateY(-20px) scale(1.1); }
}

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

.section-tag {
    display: inline-block;
    background: rgba(0, 180, 216, 0.1);
    color: var(--color-accent);
    padding: var(--space-xs) var(--space-md);
    border-radius: 100px;
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--space-md);
}

.section-title {
    font-family: var(--font-display);
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 600;
    margin-bottom: var(--space-sm);
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--color-text-muted);
    max-width: 600px;
    margin: 0 auto;
}

/* ============================================
   About Section
   ============================================ */
.about {
    padding: var(--space-3xl) 0;
    background: var(--color-bg-light);
}

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

.about-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    transition: var(--transition-base);
}

.about-card:hover {
    transform: translateY(-4px);
    border-color: var(--color-accent);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
}

.card-icon {
    width: 64px;
    height: 64px;
    background: rgba(0, 180, 216, 0.1);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--space-md);
    color: var(--color-accent);
}

.about-card h3 {
    font-family: var(--font-display);
    font-size: 1.5rem;
    margin-bottom: var(--space-sm);
}

.about-card p {
    color: var(--color-text-muted);
    line-height: 1.7;
}

/* ============================================
   Innovations Section
   ============================================ */
.innovations {
    padding: var(--space-3xl) 0;
}

.innovations-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-lg);
    margin-bottom: var(--space-xl);
}

.innovation-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: var(--transition-base);
}

.innovation-card:hover {
    transform: translateY(-4px);
    border-color: var(--color-accent);
}

.innovation-card.featured {
    grid-column: span 2;
    grid-row: span 2;
}

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

.innovation-card.featured .card-image {
    height: 300px;
}

.image-placeholder {
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-primary) 100%);
    position: relative;
}

.image-placeholder::before {
    content: '';
    position: absolute;
    inset: 0;
    background: 
        radial-gradient(circle at 30% 30%, rgba(0, 180, 216, 0.3) 0%, transparent 50%),
        radial-gradient(circle at 70% 70%, rgba(231, 111, 81, 0.2) 0%, transparent 50%);
}

.image-placeholder.prosthetics {
    background: linear-gradient(135deg, #1a3a5f 0%, #2e5090 100%);
}

.image-placeholder.imaging {
    background: linear-gradient(135deg, #2a9d8f 0%, #264653 100%);
}

.image-placeholder.ai {
    background: linear-gradient(135deg, #e76f51 0%, #f4a261 100%);
}

.image-placeholder.wearable {
    background: linear-gradient(135deg, #6b4c7a 0%, #9b6b9e 100%);
}

.card-badge {
    position: absolute;
    top: var(--space-sm);
    left: var(--space-sm);
    background: var(--color-coral);
    color: white;
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
}

.card-content {
    padding: var(--space-md);
}

.card-category {
    display: inline-block;
    color: var(--color-accent);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--space-xs);
}

.innovation-card h3 {
    font-family: var(--font-display);
    font-size: 1.25rem;
    margin-bottom: var(--space-xs);
}

.innovation-card.featured h3 {
    font-size: 1.75rem;
}

.innovation-card p {
    color: var(--color-text-muted);
    font-size: 0.95rem;
    line-height: 1.6;
    margin-bottom: var(--space-sm);
}

.card-meta {
    display: flex;
    gap: var(--space-md);
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

.innovations-cta {
    text-align: center;
}

/* ============================================
   Community Section
   ============================================ */
.community {
    padding: var(--space-3xl) 0;
    background: var(--color-bg-light);
}

.community-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3xl);
    align-items: center;
}

.community-content .section-tag {
    margin-bottom: var(--space-sm);
}

.community-content .section-title {
    text-align: left;
    margin-bottom: var(--space-sm);
}

.community-content .section-subtitle {
    text-align: left;
    margin: 0 0 var(--space-xl) 0;
}

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

.feature {
    display: flex;
    gap: var(--space-md);
    padding: var(--space-md);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    transition: var(--transition-base);
}

.feature:hover {
    border-color: var(--color-accent);
    transform: translateX(8px);
}

.feature-icon {
    font-size: 1.5rem;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 180, 216, 0.1);
    border-radius: var(--radius-md);
    flex-shrink: 0;
}

.feature-text h4 {
    font-family: var(--font-display);
    font-size: 1.125rem;
    margin-bottom: var(--space-xs);
}

.feature-text p {
    color: var(--color-text-muted);
    font-size: 0.95rem;
}

/* Community Map */
.community-visual {
    position: relative;
    height: 500px;
}

.community-map {
    position: relative;
    width: 100%;
    height: 100%;
    background: var(--color-bg-card);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    overflow: hidden;
}

.map-connections {
    position: absolute;
    inset: 0;
}

.map-connections svg {
    width: 100%;
    height: 100%;
}

.connection {
    stroke: var(--color-accent);
    stroke-width: 1;
    opacity: 0.3;
    stroke-dasharray: 5, 5;
    animation: dash 20s linear infinite;
}

@keyframes dash {
    to { stroke-dashoffset: -100; }
}

.map-node {
    position: absolute;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-xs);
}

.node-pulse {
    width: 16px;
    height: 16px;
    background: var(--color-accent);
    border-radius: 50%;
    position: relative;
}

.node-pulse::before {
    content: '';
    position: absolute;
    inset: -8px;
    border: 2px solid var(--color-accent);
    border-radius: 50%;
    opacity: 0;
    animation: node-pulse 2s ease-out infinite;
}

@keyframes node-pulse {
    0% { transform: scale(0.5); opacity: 1; }
    100% { transform: scale(2); opacity: 0; }
}

.map-node.active .node-pulse {
    background: var(--color-coral);
}

.map-node.active .node-pulse::before {
    border-color: var(--color-coral);
}

.node-label {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-text);
    background: var(--color-bg);
    padding: 2px 8px;
    border-radius: var(--radius-sm);
    white-space: nowrap;
}

.node-1 { top: 15%; left: 50%; transform: translateX(-50%); }
.node-2 { top: 35%; left: 30%; }
.node-3 { top: 40%; right: 20%; }
.node-4 { bottom: 30%; right: 20%; }
.node-5 { bottom: 20%; left: 25%; }

/* ============================================
   Events Section
   ============================================ */
.events {
    padding: var(--space-3xl) 0;
}

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

.event-card {
    display: grid;
    grid-template-columns: auto 1fr auto;
    gap: var(--space-lg);
    align-items: center;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    transition: var(--transition-base);
}

.event-card:hover {
    border-color: var(--color-accent);
    transform: translateX(8px);
}

.event-date {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: var(--color-primary);
    border-radius: var(--radius-md);
    padding: var(--space-sm) var(--space-md);
    min-width: 80px;
}

.date-day {
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 700;
    line-height: 1;
    color: var(--color-text);
}

.date-month {
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    color: var(--color-accent-light);
}

.event-info h3 {
    font-family: var(--font-display);
    font-size: 1.25rem;
    margin-bottom: var(--space-xs);
}

.event-location {
    color: var(--color-accent);
    font-size: 0.875rem;
    margin-bottom: var(--space-xs);
}

.event-desc {
    color: var(--color-text-muted);
    font-size: 0.95rem;
    line-height: 1.6;
}

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

.cta-bg {
    position: absolute;
    inset: 0;
    z-index: 0;
}

.cta-pattern {
    position: absolute;
    inset: 0;
    background: 
        radial-gradient(circle at 20% 50%, rgba(0, 180, 216, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 50%, rgba(46, 80, 144, 0.2) 0%, transparent 50%);
}

.cta-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 700px;
    margin: 0 auto;
}

.cta-title {
    font-family: var(--font-display);
    font-size: clamp(2rem, 4vw, 3rem);
    margin-bottom: var(--space-md);
}

.cta-subtitle {
    color: var(--color-text-muted);
    font-size: 1.125rem;
    margin-bottom: var(--space-xl);
    line-height: 1.7;
}

.cta-form {
    display: flex;
    gap: var(--space-sm);
    margin-bottom: var(--space-md);
    flex-wrap: wrap;
    justify-content: center;
}

.cta-form input {
    flex: 1;
    min-width: 280px;
    padding: var(--space-sm) var(--space-md);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background: var(--color-bg-card);
    color: var(--color-text);
    font-size: 1rem;
    transition: var(--transition-fast);
}

.cta-form input:focus {
    outline: none;
    border-color: var(--color-accent);
}

.cta-form input::placeholder {
    color: var(--color-text-muted);
}

.cta-note {
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

/* ============================================
   Footer
   ============================================ */
.footer {
    padding: var(--space-3xl) 0 var(--space-lg);
    background: var(--color-bg-light);
    border-top: 1px solid var(--color-border);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr repeat(3, 1fr);
    gap: var(--space-xl);
    margin-bottom: var(--space-2xl);
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: var(--space-md);
}

.footer-brand p {
    color: var(--color-text-muted);
    margin-bottom: var(--space-lg);
    max-width: 300px;
}

.footer-social {
    display: flex;
    gap: var(--space-sm);
}

.footer-social a {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-weight: 600;
    transition: var(--transition-fast);
}

.footer-social a:hover {
    background: var(--color-accent);
    border-color: var(--color-accent);
    color: var(--color-bg);
}

.footer-links h4 {
    font-family: var(--font-display);
    font-size: 1rem;
    margin-bottom: var(--space-md);
    color: var(--color-text);
}

.footer-links ul {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.footer-links a {
    color: var(--color-text-muted);
    font-size: 0.95rem;
    transition: var(--transition-fast);
}

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

.footer-bottom {
    text-align: center;
    padding-top: var(--space-xl);
    border-top: 1px solid var(--color-border);
}

.footer-bottom p {
    color: var(--color-text-muted);
    font-size: 0.875rem;
}

/* ============================================
   Responsive Design
   ============================================ */
@media (max-width: 1024px) {
    .hero-visual {
        display: none;
    }
    
    .community-layout {
        grid-template-columns: 1fr;
    }
    
    .community-visual {
        order: -1;
        height: 350px;
    }
    
    .innovations-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .innovation-card.featured {
        grid-column: span 2;
        grid-row: span 1;
    }
    
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--color-bg);
        flex-direction: column;
        padding: var(--space-lg);
        gap: var(--space-md);
        border-bottom: 1px solid var(--color-border);
    }
    
    .nav-links.active {
        display: flex;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .hero {
        padding-top: calc(var(--space-2xl) + 60px);
    }
    
    .hero-actions {
        flex-direction: column;
    }
    
    .hero-stats {
        flex-direction: column;
        gap: var(--space-lg);
    }
    
    .innovations-grid {
        grid-template-columns: 1fr;
    }
    
    .innovation-card.featured {
        grid-column: span 1;
    }
    
    .event-card {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .event-date {
        margin: 0 auto;
    }
    
    .cta-form {
        flex-direction: column;
    }
    
    .cta-form input {
        width: 100%;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .footer-brand p {
        margin: 0 auto var(--space-lg);
    }
    
    .footer-social {
        justify-content: center;
    }
}

/* ============================================
   Animations & Utilities
   ============================================ */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Smooth scroll offset for fixed nav */
html {
    scroll-padding-top: 100px;
}