/* Reset et variables CSS */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
:root {
    /* Couleurs principales */
    --primary-color: #667eea;
    --primary-dark: #5a67d8;
    --secondary-color: #764ba2;
    --accent-color: #f093fb;
    --text-dark: #2d3748;
    --text-light: #718096;
    --white: #ffffff;
    --gray-light: #f7fafc;
    --gray-medium: #e2e8f0;
    --gray-dark: #4a5568;
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-secondary: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --gradient-background: linear-gradient(135deg, #667eea 0%, #764ba2 50%, #f093fb 100%);
    /* Typographie */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    --font-size-5xl: 3rem;
    /* Espacements */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    /* Ombres */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    /* Bordures */
    --border-radius-sm: 0.375rem;
    --border-radius-md: 0.5rem;
    --border-radius-lg: 0.75rem;
    --border-radius-xl: 1rem;
    /* Transitions 
    --transition-fast: 0.15s ease-in-out;
    --transition-normal: 0.3s ease-in-out;
    --transition-slow: 0.5s ease-in-out;
*/}
body {
    font-family: var(--font-family);
    line-height: 1.6;
    color: var(--text-dark);
    overflow-x: hidden;
}
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}
/* Boutons */
.btn {
    display: inline-block;
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: var(--font-size-base);
    font-weight: 600;
    text-decoration: none;
    border-radius: var(--border-radius-lg);
    cursor: pointer;
    border: none;
    text-align: center;
    position: relative;
    overflow: hidden;
}
.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
}
.btn:hover::before {
    left: 100%;
}
.btn-primary {
    background: var(--gradient-primary);
    color: var(--white);
    box-shadow: var(--shadow-md);
}
.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}
.btn-secondary {
    background: transparent;
    color: var(--white);
    border: 2px solid var(--white);
}
.btn-secondary:hover {
    background: var(--white);
    color: var(--primary-color);
    transform: translateY(-2px);
}
.btn-outline {
    background: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}
.btn-outline:hover {
    background: var(--primary-color);
    color: var(--white);
    transform: translateY(-2px);
}
.btn-full {
    width: 100%;
}
/* Header */
.header {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    border-bottom: 1px solid var(--gray-medium);
}
.nav {
    padding: var(--spacing-md) 0;
}
.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}
.nav-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}
.nav-logo h2 {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    font-weight: 800;
    font-size: var(--font-size-xl);
    margin: 0;
}
.logo-img {
    height: 40px;
    width: auto;
}
.logo-img:hover {
    transform: scale(1.05);
}
.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--spacing-xl);
}
.nav-link {
    text-decoration: none;
    color: var(--text-dark);
    font-weight: 500;
    position: relative;
}
.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
}
.nav-link:hover {
    color: var(--primary-color);
}
.nav-link:hover::after {
    width: 100%;
}
.nav-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
}
.bar {
    width: 25px;
    height: 3px;
    background: var(--text-dark);
    margin: 3px 0;
}
/* Hero Section */
.hero {
    min-height: 100vh;
    background: var(--gradient-background);
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
}
.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0.1;
    background-image: 
        radial-gradient(circle at 20% 50%, rgba(120, 119, 198, 0.3) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(255, 255, 255, 0.2) 0%, transparent 50%),
        radial-gradient(circle at 40% 80%, rgba(120, 119, 198, 0.2) 0%, transparent 50%);
}
.hero-content {
    width: 100%;
    text-align: center;
    color: var(--white);
    z-index: 2;
    position: relative;
}
.countdown-container {
    margin-bottom: var(--spacing-2xl);
}
.countdown {
    display: flex;
    justify-content: center;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}
.countdown-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius-xl);
    border: 1px solid rgba(255, 255, 255, 0.2);
    min-width: 80px;
}
.countdown-item span:first-child {
    font-size: var(--font-size-3xl);
    font-weight: 800;
    line-height: 1;
}
.countdown-label {
    font-size: var(--font-size-sm);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-top: var(--spacing-xs);
}
.hero-title {
    font-size: clamp(var(--font-size-3xl), 5vw, var(--font-size-5xl));
    font-weight: 800;
    margin-bottom: var(--spacing-md);
    background: linear-gradient(135deg, #ffffff 0%, #f0f0f0 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}
.hero-subtitle {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    opacity: 0.9;
}
.hero-date {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--spacing-lg);
    color: var(--accent-color);
    text-transform: uppercase;
    letter-spacing: 2px;
}
.hero-description {
    font-size: var(--font-size-lg);
    max-width: 600px;
    margin: 0 auto var(--spacing-2xl);
    opacity: 0.9;
    line-height: 1.7;
}
.hero-buttons {
    display: flex;
    gap: var(--spacing-lg);
    justify-content: center;
    flex-wrap: wrap;
}
.hero-visual {
    position: absolute;
    top: 0;
    right: 0;
    width: 50%;
    height: 100%;
    pointer-events: none;
}
.floating-elements {
    position: relative;
    width: 100%;
    height: 100%;
}
.floating-element {
    position: absolute;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
}
.element-1 {
    width: 200px;
    height: 200px;
    top: 20%;
    right: 10%;
    animation-delay: 0s;
}
.element-2 {
    width: 150px;
    height: 150px;
    top: 60%;
    right: 25%;
    animation-delay: 2s;
}
.element-3 {
    width: 100px;
    height: 100px;
    top: 40%;
    right: 45%;
    animation-delay: 4s;
}
/* Animations supprimées */
/* Sections communes */
.section-header {
    text-align: center;
    margin-bottom: var(--spacing-3xl);
}
.section-header h2 {
    font-size: var(--font-size-3xl);
    font-weight: 800;
    margin-bottom: var(--spacing-lg);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}
.section-header p {
    font-size: var(--font-size-lg);
    color: var(--text-light);
    max-width: 600px;
    margin: 0 auto;
}
/* Vision Section */
.vision {
    padding: var(--spacing-3xl) 0;
    background: var(--white);
}

/* Nouveau layout avec photo */
.vision-layout {
    display: grid;
    grid-template-columns: 1fr 400px;
    gap: var(--spacing-3xl);
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
}

.vision-content {
    text-align: left;
}

.vision-content h3 {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    margin-bottom: var(--spacing-lg);
    color: var(--text-dark);
}

.vision-content p {
    font-size: var(--font-size-lg);
    color: var(--text-light);
    margin-bottom: var(--spacing-lg);
    line-height: 1.8;
}

/* Cadre photo professionnel */
.vision-image {
    position: relative;
}

.promo-frame {
    position: relative;
    border-radius: var(--border-radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-xl);
    background: var(--white);
    padding: var(--spacing-md);
    transform: rotate(-2deg);
    cursor: pointer;
}

.promo-frame:hover {
    transform: rotate(0deg) scale(1.02);
}

.promo-frame:hover .zoom-indicator {
    opacity: 1;
}

.promo-photo {
    width: 100%;
    height: auto;
    border-radius: var(--border-radius-lg);
    display: block;
}

/* Indicateur de zoom */
.zoom-indicator {
    position: absolute;
    top: var(--spacing-lg);
    right: var(--spacing-lg);
    background: rgba(0, 0, 0, 0.8);
    color: var(--white);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--border-radius-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: var(--font-size-sm);
    opacity: 0;
    pointer-events: none;
}

.zoom-indicator i {
    font-size: var(--font-size-base);
}

.promo-caption {
    padding: var(--spacing-lg) var(--spacing-md);
    text-align: center;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--white);
    margin-top: var(--spacing-md);
    border-radius: var(--border-radius-lg);
}

.promo-caption h4 {
    font-size: var(--font-size-lg);
    font-weight: 700;
    margin: 0 0 var(--spacing-xs) 0;
    text-shadow: 0 1px 2px rgba(0,0,0,0.3);
}

.promo-caption p {
    font-size: var(--font-size-base);
    margin: 0;
    opacity: 0.9;
}

/* Responsive */
@media (max-width: 768px) {
    .vision-layout {
        grid-template-columns: 1fr;
        gap: var(--spacing-2xl);
        text-align: center;
    }
    
    .vision-content {
        text-align: center;
    }
    
    .promo-frame {
        transform: none;
        max-width: 350px;
        margin: 0 auto;
    }
    
    .promo-frame:hover {
        transform: scale(1.02);
    }
    
    .zoom-indicator {
        opacity: 1;
        background: rgba(102, 126, 234, 0.9);
        top: var(--spacing-md);
        right: var(--spacing-md);
        font-size: var(--font-size-xs);
        padding: var(--spacing-xs) var(--spacing-sm);
    }
    
    .zoom-indicator span {
        display: none;
    }
}
.cnfp-highlight {
    margin-top: var(--spacing-2xl);
    padding: var(--spacing-xl);
    background: var(--gradient-primary);
    border-radius: var(--border-radius-xl);
    text-align: center;
    box-shadow: var(--shadow-lg);
    transform: perspective(1000px) rotateX(5deg);
}
.cnfp-highlight:hover {
    transform: perspective(1000px) rotateX(0deg) scale(1.02);
}
.cnfp-highlight p {
    color: var(--white);
    font-size: var(--font-size-xl);
    font-weight: 700;
    margin: 0;
    text-shadow: 0 2px 4px rgba(0,0,0,0.3);
    letter-spacing: 1px;
}
/* Expect Section */
.expect {
    padding: var(--spacing-3xl) 0;
    background: var(--gray-light);
}
.expect-content {
    text-align: center;
}
.expect-content h2 {
    font-size: var(--font-size-3xl);
    font-weight: 800;
    margin-bottom: var(--spacing-lg);
    color: var(--text-dark);
}
.expect-content > p {
    font-size: var(--font-size-lg);
    color: var(--text-light);
    max-width: 700px;
    margin: 0 auto var(--spacing-2xl);
    line-height: 1.8;
}
.expect-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-2xl);
}
.feature {
    background: var(--white);
    padding: var(--spacing-xl);
    border-radius: var(--border-radius-xl);
    box-shadow: var(--shadow-md);
}
.feature:hover {
    transform: translateY(-5px);
}
.feature i {
    font-size: var(--font-size-3xl);
    color: var(--primary-color);
    margin-bottom: var(--spacing-lg);
}
.feature h4 {
    font-size: var(--font-size-xl);
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    color: var(--text-dark);
}
.feature p {
    color: var(--text-light);
    line-height: 1.7;
}
/* Program Section - Stands */
.program {
    padding: var(--spacing-3xl) 0;
    background: var(--white);
}
.stands-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-2xl);
}
.stand-card {
    background: var(--white);
    border-radius: var(--border-radius-xl);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--gray-medium);
    position: relative;
    overflow: hidden;
}
.stand-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--gradient-primary);
    transform: scaleX(0);
}
.stand-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}
.stand-card:hover::before {
    transform: scaleX(1);
}
.stand-icon {
    width: 60px;
    height: 60px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-lg);
    color: var(--white);
    font-size: var(--font-size-xl);
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.stand-icon-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 50%;
}
.stand-info h4 {
    font-size: var(--font-size-lg);
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    color: var(--text-dark);
}
.stand-info p {
    color: var(--text-light);
    margin-bottom: var(--spacing-lg);
    line-height: 1.6;
}
.stand-technologies {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
}
.tech-tag {
    background: var(--gray-light);
    color: var(--text-dark);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--border-radius-sm);
    font-size: var(--font-size-sm);
    font-weight: 500;
}
.stand-schedule {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--primary-color);
    font-weight: 600;
    font-size: var(--font-size-sm);
}
.program-filters {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}
.program-filter {
    padding: var(--spacing-sm) var(--spacing-lg);
    border: 2px solid var(--primary-color);
    background: transparent;
    color: var(--primary-color);
    border-radius: var(--border-radius-lg);
    font-weight: 600;
    cursor: pointer;
}
.program-filter:hover,
.program-filter.active {
    background: var(--primary-color);
    color: var(--white);
    transform: translateY(-2px);
}
/* Gallery Section */
.gallery {
    padding: var(--spacing-3xl) 0;
    background: var(--gray-light);
}
.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
    margin: var(--spacing-2xl) 0;
}
.gallery-item {
    position: relative;
    aspect-ratio: 1;
    border-radius: var(--border-radius-xl);
    overflow: hidden;
    cursor: pointer;
    box-shadow: var(--shadow-md);
}
.gallery-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}
.gallery-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}
.gallery-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: var(--white);
    text-align: center;
    padding: var(--spacing-lg);
}
.gallery-placeholder.tech { background: linear-gradient(135deg, #667eea 0%, #764ba2 100%); }
.gallery-placeholder.art { background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%); }
.gallery-placeholder.music { background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%); }
.gallery-placeholder.networking { background: linear-gradient(135deg, #43e97b 0%, #38f9d7 100%); }
.gallery-placeholder.gaming { background: linear-gradient(135deg, #fa709a 0%, #fee140 100%); }
.gallery-placeholder.medical { background: linear-gradient(135deg, #a8edea 0%, #fed6e3 100%); }
.gallery-placeholder.eco { background: linear-gradient(135deg, #d299c2 0%, #fef9d7 100%); }
.gallery-placeholder.backstage { background: linear-gradient(135deg, #89f7fe 0%, #66a6ff 100%); }
.gallery-placeholder i {
    font-size: var(--font-size-3xl);
    margin-bottom: var(--spacing-md);
}
.gallery-placeholder span {
    font-weight: 600;
    font-size: var(--font-size-lg);
}
.gallery-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(to top, rgba(0,0,0,0.8) 0%, rgba(0,0,0,0.4) 50%, transparent 100%);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    padding: var(--spacing-lg);
    opacity: 0;
    pointer-events: none;
}
.gallery-item:hover .gallery-overlay {
    opacity: 1;
    pointer-events: all;
}
.gallery-info {
    align-self: flex-end;
    color: var(--white);
    text-align: left;
}
.gallery-info h4 {
    font-size: var(--font-size-lg);
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
}
.gallery-info p {
    font-size: var(--font-size-sm);
    margin-bottom: var(--spacing-xs);
    opacity: 0.9;
}
.gallery-date {
    font-size: var(--font-size-xs);
    opacity: 0.8;
}
.gallery-date i {
    margin-right: var(--spacing-xs);
}
.gallery-expand {
    align-self: flex-start;
    color: var(--white);
    font-size: var(--font-size-xl);
    opacity: 0.8;
}
.gallery-filters {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    flex-wrap: wrap;
    margin-bottom: var(--spacing-2xl);
}
.filter-btn {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-lg);
    border: 2px solid var(--primary-color);
    background: transparent;
    color: var(--primary-color);
    border-radius: var(--border-radius-lg);
    font-weight: 600;
    cursor: pointer;
    font-size: var(--font-size-sm);
}
.filter-btn:hover,
.filter-btn.active {
    background: var(--primary-color);
    color: var(--white);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}
.gallery-cta {
    text-align: center;
    margin-top: var(--spacing-2xl);
    padding: var(--spacing-2xl);
    background: var(--gray-light);
    border-radius: var(--border-radius-xl);
}
.gallery-cta p {
    margin-bottom: var(--spacing-lg);
    color: var(--text-light);
    font-size: var(--font-size-lg);
}
.gallery-cta .btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
}

/* Lightbox Styles */
.lightbox {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.9);
    z-index: 1000;
    display: none;
    align-items: center;
    justify-content: center;
}
.lightbox.active {
    display: flex;
}
.lightbox-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    cursor: pointer;
}
.lightbox-content {
    position: relative;
    max-width: 90vw;
    max-height: 90vh;
    display: flex;
    align-items: center;
    justify-content: center;
}
.lightbox-image-container {
    position: relative;
    max-width: 100%;
    max-height: 100%;
}
.lightbox-image-container img {
    max-width: 100%;
    max-height: 80vh;
    object-fit: contain;
    border-radius: var(--border-radius-lg);
}
.lightbox-info {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(to top, rgba(0,0,0,0.8), transparent);
    color: var(--white);
    padding: var(--spacing-lg);
    border-radius: 0 0 var(--border-radius-lg) var(--border-radius-lg);
}
.lightbox-info h3 {
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-sm);
}
.lightbox-info p {
    font-size: var(--font-size-base);
    margin-bottom: var(--spacing-sm);
    opacity: 0.9;
}
.lightbox-close,
.lightbox-prev,
.lightbox-next {
    position: absolute;
    background: rgba(255, 255, 255, 0.1);
    border: none;
    color: var(--white);
    font-size: var(--font-size-xl);
    padding: var(--spacing-md);
    border-radius: 50%;
    cursor: pointer;
    backdrop-filter: blur(10px);
}
.lightbox-close:hover,
.lightbox-prev:hover,
.lightbox-next:hover {
    background: rgba(255, 255, 255, 0.2);
}
.lightbox-close {
    top: var(--spacing-lg);
    right: var(--spacing-lg);
}
.lightbox-prev {
    left: var(--spacing-lg);
    top: 50%;
    transform: translateY(-50%);
}
.lightbox-next {
    right: var(--spacing-lg);
    top: 50%;
    transform: translateY(-50%);
}
.lightbox-counter {
    position: absolute;
    bottom: var(--spacing-lg);
    left: 50%;
    transform: translateX(-50%);
    background: rgba(0, 0, 0, 0.7);
    color: var(--white);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--border-radius-lg);
    font-size: var(--font-size-sm);
}

/* Responsive Gallery */
@media (max-width: 768px) {
    .gallery-grid {
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
        gap: var(--spacing-md);
    }
    .gallery-filters {
        gap: var(--spacing-sm);
    }
    .filter-btn {
        padding: var(--spacing-sm) var(--spacing-md);
        font-size: var(--font-size-xs);
    }
    .lightbox-prev,
    .lightbox-next {
        display: none;
    }
}

/* Video Section */
.video-section {
    padding: var(--spacing-3xl) 0;
    background: var(--white);
}
.video-container {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
    aspect-ratio: 16/9;
    border-radius: var(--border-radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}
.video-placeholder {
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--text-dark) 0%, var(--gray-dark) 100%);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: var(--white);
    text-align: center;
    position: relative;
    cursor: pointer;
}
.video-placeholder:hover {
    transform: scale(1.02);
}
.video-play-button {
    width: 80px;
    height: 80px;
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-lg);
    font-size: var(--font-size-2xl);
    border: 2px solid rgba(255, 255, 255, 0.3);
}
.video-placeholder:hover .video-play-button {
    background: rgba(255, 255, 255, 0.3);
    transform: scale(1.1);
}
.video-info h3 {
    font-size: var(--font-size-xl);
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
}
.video-info p {
    font-size: var(--font-size-base);
    opacity: 0.9;
}
/* Location Section */
.location {
    padding: var(--spacing-3xl) 0;
    background: var(--gray-light);
}
.location-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    align-items: start;
}
.location-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
}
.location-card {
    background: var(--white);
    padding: var(--spacing-xl);
    border-radius: var(--border-radius-xl);
    box-shadow: var(--shadow-md);
    text-align: center;
}
.location-card:hover {
    transform: translateY(-5px);
}
.location-card i {
    font-size: var(--font-size-2xl);
    color: var(--primary-color);
    margin-bottom: var(--spacing-lg);
}
.location-card h4 {
    font-size: var(--font-size-lg);
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    color: var(--text-dark);
}
.location-card p {
    color: var(--text-light);
    line-height: 1.6;
}
.location-map {
    position: relative;
}
.map-placeholder {
    width: 100%;
    height: 400px;
    background: var(--gradient-primary);
    border-radius: var(--border-radius-xl);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: var(--white);
    text-align: center;
    cursor: pointer;
}
.map-placeholder:hover {
    transform: scale(1.02);
}
.map-placeholder i {
    font-size: var(--font-size-3xl);
    margin-bottom: var(--spacing-lg);
}
.map-placeholder p {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}
.map-placeholder small {
    opacity: 0.8;
}
/* Responsive adjustments for new sections */
@media (max-width: 768px) {
    .stands-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    .gallery-grid {
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
        gap: var(--spacing-md);
    }
    .location-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-2xl);
    }
    .location-info {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
    .program-filters,
    .gallery-filters {
        flex-direction: column;
        align-items: center;
    }
    .video-play-button {
        width: 60px;
        height: 60px;
        font-size: var(--font-size-xl);
    }
    .map-placeholder {
        height: 300px;
    }
}
/* Speakers Section */
.speakers {
    padding: var(--spacing-3xl) 0;
    background: var(--gray-light);
}
.speakers-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-2xl);
}
.speaker-card {
    background: var(--white);
    border-radius: var(--border-radius-xl);
    padding: var(--spacing-xl);
    text-align: center;
    box-shadow: var(--shadow-md);
}
.speaker-card:hover {
    transform: translateY(-5px);
}
.speaker-image {
    margin-bottom: var(--spacing-lg);
}
.speaker-placeholder {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    background: var(--gradient-primary);
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: var(--font-size-3xl);
}
.speaker-info h4 {
    font-size: var(--font-size-lg);
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    color: var(--text-dark);
}
.speaker-title {
    color: var(--primary-color);
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}
.speaker-company {
    color: var(--text-light);
    font-size: var(--font-size-sm);
}
.speakers-cta {
    text-align: center;
}

/* Styles spéciaux pour l'équipe dirigeante CNFP */
.speaker-card.leadership {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: var(--white);
    position: relative;
    overflow: hidden;
}

.speaker-card.leadership::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 70%);
    animation: shimmer 3s ease-in-out infinite;
}

.speaker-card.leadership .speaker-info h4,
.speaker-card.leadership .speaker-title {
    color: var(--white);
    text-shadow: 0 2px 4px rgba(0,0,0,0.3);
}

.speaker-card.leadership .speaker-company {
    color: rgba(255, 255, 255, 0.9);
}

/* Styles pour les différents types de dirigeants */
.speaker-placeholder.president {
    background: linear-gradient(135deg, #FFD700 0%, #FFA500 100%);
    border: 3px solid #FFD700;
    box-shadow: 0 0 20px rgba(255, 215, 0, 0.5);
}

.speaker-placeholder.vp-internal {
    background: linear-gradient(135deg, #32CD32 0%, #228B22 100%);
    border: 3px solid #32CD32;
}

.speaker-placeholder.vp-external {
    background: linear-gradient(135deg, #4169E1 0%, #0000CD 100%);
    border: 3px solid #4169E1;
}

/* Styles pour les chefs de groupe selon leur domaine */
.speaker-placeholder.tech {
    background: linear-gradient(135deg, #FF6B6B 0%, #E74C3C 100%);
}

.speaker-placeholder.media {
    background: linear-gradient(135deg, #3498DB 0%, #2980B9 100%);
}

.speaker-placeholder.env {
    background: linear-gradient(135deg, #2ECC71 0%, #27AE60 100%);
}

.speaker-placeholder.art {
    background: linear-gradient(135deg, #9B59B6 0%, #8E44AD 100%);
}

.speaker-placeholder.music {
    background: linear-gradient(135deg, #F39C12 0%, #E67E22 100%);
}

.speaker-placeholder.culture {
    background: linear-gradient(135deg, #34495E 0%, #2C3E50 100%);
}

.speaker-placeholder.personal {
    background: linear-gradient(135deg, #1ABC9C 0%, #16A085 100%);
}

.speaker-placeholder.medical {
    background: linear-gradient(135deg, #E74C3C 0%, #C0392B 100%);
}

.speaker-placeholder.education {
    background: linear-gradient(135deg, #3498DB 0%, #2980B9 100%);
}

.speaker-placeholder.gaming {
    background: linear-gradient(135deg, #9B59B6 0%, #8E44AD 100%);
}

.speaker-placeholder.languages {
    background: linear-gradient(135deg, #F1C40F 0%, #F39C12 100%);
}

.speaker-placeholder.audiovisual {
    background: linear-gradient(135deg, #E67E22 0%, #D35400 100%);
}

.speaker-placeholder.sports {
    background: linear-gradient(135deg, #27AE60 0%, #229954 100%);
}

@keyframes shimmer {
    0%, 100% { transform: translateX(-100%) translateY(-100%) rotate(0deg); }
    50% { transform: translateX(100%) translateY(100%) rotate(180deg); }
}

/* Nouveaux styles pour l'organisation améliorée */
.team-filters {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-3xl);
    flex-wrap: wrap;
}

.team-filter {
    padding: var(--spacing-sm) var(--spacing-lg);
    border: 2px solid var(--primary-color);
    background: transparent;
    color: var(--primary-color);
    border-radius: var(--border-radius-lg);
    font-weight: 600;
    cursor: pointer;
    font-size: var(--font-size-sm);
}

.team-filter:hover,
.team-filter.active {
    background: var(--primary-color);
    color: var(--white);
    transform: translateY(-2px);
}

/* Section Direction - Mise en avant */
.direction-highlight {
    margin-bottom: var(--spacing-3xl);
    padding: var(--spacing-2xl);
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.1) 0%, rgba(118, 75, 162, 0.1) 100%);
    border-radius: var(--border-radius-xl);
    border: 2px solid rgba(102, 126, 234, 0.2);
}

.direction-title {
    text-align: center;
    font-size: var(--font-size-2xl);
    font-weight: 800;
    margin-bottom: var(--spacing-2xl);
    color: var(--primary-color);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.direction-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-xl);
    max-width: 900px;
    margin: 0 auto;
}

.president-card {
    transform: scale(1.05);
    position: relative;
}

.president-card::after {
    content: '👑 PRÉSIDENT';
    position: absolute;
    top: -10px;
    left: 50%;
    transform: translateX(-50%);
    background: linear-gradient(135deg, #FFD700 0%, #FFA500 100%);
    color: var(--text-dark);
    font-size: var(--font-size-xs);
    font-weight: 800;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--border-radius-sm);
    box-shadow: var(--shadow-md);
}

/* Section Chefs de Groupe */
.chefs-section {
    margin-bottom: var(--spacing-2xl);
}

.section-subtitle {
    text-align: center;
    font-size: var(--font-size-xl);
    font-weight: 700;
    margin-bottom: var(--spacing-xl);
    color: var(--text-dark);
}

/* Layout compact pour les chefs de groupe */
.speakers-grid.compact {
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-lg);
}

.speaker-card.compact-card {
    padding: var(--spacing-lg);
    text-align: center;
}

.speaker-image.compact {
    margin-bottom: var(--spacing-md);
}

.speaker-image.compact .speaker-placeholder {
    width: 80px;
    height: 80px;
    font-size: var(--font-size-xl);
}

.compact-card .speaker-info h4 {
    font-size: var(--font-size-base);
    margin-bottom: var(--spacing-xs);
}

.compact-card .speaker-title {
    font-size: var(--font-size-sm);
    font-weight: 600;
}

.compact-card .speaker-company {
    display: none; /* Caché pour économiser l'espace */
}

/* États des filtres */
[data-category="direction"],
[data-category="chefs"] {
    display: block;
}

.speakers[data-filter="direction"] [data-category="chefs"],
.speakers[data-filter="chefs"] [data-category="direction"] {
    display: none;
}

/* Responsive pour le nouveau layout */
@media (max-width: 768px) {
    .direction-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    
    .speakers-grid.compact {
        grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
        gap: var(--spacing-md);
    }
    
    .team-filters {
        flex-direction: column;
        align-items: center;
        gap: var(--spacing-sm);
    }
    
    .team-filter {
        width: 200px;
        text-align: center;
    }
    
    .president-card::after {
        font-size: 10px;
        padding: 2px 6px;
    }
}
/* Registration Section */
.registration {
    padding: var(--spacing-3xl) 0;
    background: var(--gradient-background);
    color: var(--white);
}
.registration-content {
    max-width: 600px;
    margin: 0 auto;
    text-align: center;
}
.registration-content h2 {
    font-size: var(--font-size-3xl);
    font-weight: 800;
    margin-bottom: var(--spacing-lg);
}
.registration-content > p {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-2xl);
    opacity: 0.9;
}
.registration-form {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    padding: var(--spacing-2xl);
    border-radius: var(--border-radius-xl);
    margin-bottom: var(--spacing-2xl);
    border: 1px solid rgba(255, 255, 255, 0.2);
}
.form-group {
    margin-bottom: var(--spacing-lg);
}
.form-group input,
.form-group select {
    width: 100%;
    padding: var(--spacing-md);
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: var(--border-radius-lg);
    background: rgba(255, 255, 255, 0.1);
    color: var(--white);
    font-size: var(--font-size-base);
}
.form-group input::placeholder {
    color: rgba(255, 255, 255, 0.7);
}
.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: rgba(255, 255, 255, 0.6);
    background: rgba(255, 255, 255, 0.15);
}
.form-group select option {
    background: var(--text-dark);
    color: var(--white);
}
.registration-stats {
    display: flex;
    justify-content: center;
    gap: var(--spacing-2xl);
}
.stat {
    text-align: center;
}
.stat-number {
    display: block;
    font-size: var(--font-size-3xl);
    font-weight: 800;
    margin-bottom: var(--spacing-xs);
}
.stat-label {
    font-size: var(--font-size-sm);
    opacity: 0.8;
    text-transform: uppercase;
    letter-spacing: 1px;
}
/* Partners Section */
.partners {
    padding: var(--spacing-3xl) 0;
    background: var(--white);
}

.partners-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: var(--spacing-xl);
}

.partner-logo {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 140px;
    background: var(--white);
    border-radius: var(--border-radius-lg);
    border: 2px solid var(--gray-medium);
    box-shadow: var(--shadow-sm);
    padding: var(--spacing-lg);
    position: relative;
    overflow: hidden;
}

.partner-logo::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.05) 0%, rgba(118, 75, 162, 0.05) 100%);
    opacity: 0;
    z-index: 1;
}

.partner-logo:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
}

.partner-logo:hover::before {
    opacity: 1;
}

.partner-placeholder {
    color: var(--text-light);
    font-weight: 600;
    text-align: center;
    font-size: var(--font-size-base);
    z-index: 2;
    position: relative;
}

.partner-placeholder div {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.partner-placeholder p {
    margin: 0;
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--text-light);
}

.partner-placeholder i {
    margin-bottom: var(--spacing-sm) !important;
}

/* CTA pour devenir partenaire */
.partners-cta {
    text-align: center;
    margin-top: var(--spacing-2xl);
    padding-top: var(--spacing-2xl);
    border-top: 1px solid var(--gray-medium);
}

.partners-cta p {
    color: var(--text-light);
    margin-bottom: var(--spacing-md);
    font-size: var(--font-size-lg);
}

/* Styles pour les images des partenaires */
.partner-logo img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    z-index: 2;
    position: relative;
    filter: grayscale(20%);
}

.partner-logo:hover img {
    filter: grayscale(0%);
    transform: scale(1.05);
}

/* Style spécial pour le logo de l'université */
.partner-logo img[src*="LOGO_UNIV_ORAN"] {
    max-height: 80px;
    width: auto;
}
/* Footer */
.footer {
    background: var(--text-dark);
    color: var(--white);
    padding: var(--spacing-3xl) 0 var(--spacing-xl);
    width: 100%;
}

.footer .container {
    max-width: none;
    width: 100%;
    padding: 0 var(--spacing-xl);
}
.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-2xl);
    margin-bottom: var(--spacing-2xl);
}
.footer-section h3,
.footer-section h4 {
    margin-bottom: var(--spacing-lg);
    color: var(--white);
}
.footer-section h3 {
    font-size: var(--font-size-xl);
    font-weight: 800;
}
.footer-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}
.footer-logo-img {
    height: 35px;
    width: auto;
    filter: brightness(0) invert(1);
}
.footer-logo-img:hover {
    transform: scale(1.05);
}
.footer-logo h3 {
    margin: 0;
}
.cnfp-motto {
    margin-top: var(--spacing-md);
    padding: var(--spacing-sm) var(--spacing-md);
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius-md);
    border-left: 3px solid var(--primary-color);
}
.cnfp-motto small {
    color: rgba(255, 255, 255, 0.9);
    font-style: italic;
    font-weight: 500;
}
.footer-section h4 {
    font-size: var(--font-size-lg);
    font-weight: 600;
}
.footer-section p,
.footer-section li {
    color: var(--gray-medium);
    margin-bottom: var(--spacing-sm);
}
.footer-section ul {
    list-style: none;
}
.footer-section a {
    color: var(--gray-medium);
    text-decoration: none;
}
.footer-section a:hover {
    color: var(--white);
}
.social-links {
    display: flex;
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}
.social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: var(--primary-color);
    border-radius: 50%;
    color: var(--white);
    font-size: var(--font-size-lg);
}
.social-link:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
}
.newsletter-form {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-lg);
}
.newsletter-form input {
    flex: 1;
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--gray-dark);
    border-radius: var(--border-radius-md);
    background: var(--gray-dark);
    color: var(--white);
}
.newsletter-form input::placeholder {
    color: var(--gray-medium);
}
.newsletter-form .btn {
    padding: var(--spacing-sm) var(--spacing-lg);
}
.footer-bottom {
    border-top: 1px solid var(--gray-dark);
    padding-top: var(--spacing-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-lg);
}
.footer-links {
    display: flex;
    gap: var(--spacing-lg);
}
.footer-links a {
    color: var(--gray-medium);
    text-decoration: none;
    font-size: var(--font-size-sm);
}
.footer-links a:hover {
    color: var(--white);
}
/* Responsive Design */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: var(--white);
        width: 100%;
        text-align: center;
        box-shadow: var(--shadow-lg);
        padding: var(--spacing-xl) 0;
    }
    .nav-menu.active {
        left: 0;
    }
    .nav-toggle {
        display: flex;
    }
    .nav-toggle.active .bar:nth-child(2) {
        opacity: 0;
    }
    .nav-toggle.active .bar:nth-child(1) {
        transform: translateY(8px) rotate(45deg);
    }
    .nav-toggle.active .bar:nth-child(3) {
        transform: translateY(-8px) rotate(-45deg);
    }
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    .btn {
        width: 100%;
        max-width: 280px;
    }
    .countdown {
        gap: var(--spacing-md);
    }
    .countdown-item {
        min-width: 60px;
        padding: var(--spacing-md);
    }
    .countdown-item span:first-child {
        font-size: var(--font-size-2xl);
    }
    .expect-features {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    .speakers-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    .registration-stats {
        gap: var(--spacing-lg);
    }
    .footer-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }
    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
    .newsletter-form {
        flex-direction: column;
    }
    .timeline-item {
        flex-direction: column;
        gap: var(--spacing-md);
    }
    .timeline-content {
        margin-left: 0;
    }
    .timeline-content::before {
        display: none;
    }
    .program-timeline::before {
        display: none;
    }
}
@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-md);
    }
    .hero-title {
        font-size: var(--font-size-3xl);
    }
    .hero-subtitle {
        font-size: var(--font-size-lg);
    }
    .section-header h2 {
        font-size: var(--font-size-2xl);
    }
    .registration-form {
        padding: var(--spacing-lg);
    }
    .logo-img {
        height: 30px;
    }
    .footer-logo-img {
        height: 25px;
    }
    .nav-logo {
        gap: var(--spacing-sm);
    }
    .nav-logo h2 {
        font-size: var(--font-size-lg);
    }
}
/* Animations supprimées pour éviter les effets de fade out */
/* Smooth scrolling */
html {
    scroll-behavior: smooth;
}
/* Focus styles for accessibility */
.btn:focus,
input:focus,
select:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}
/* Loading animation supprimée */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255,255,255,.3);
    border-radius: 50%;
    border-top-color: #fff;
}