/* ========================================
   RESET & VARIABLES
   ======================================== */

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

:root {
    /* Palette Gris-Bleus Sport Mécanique */
    --primary-blue: #00a8ff;
    --secondary-blue: #0097e6;
    --dark-blue: #192a56;
    --accent-cyan: #00d2d3;
    
    --dark-bg: #0a0e27;
    --darker-bg: #070b1f;
    --card-bg: #141b3d;
    --card-hover: #1a2347;
    
    --gray-900: #1e272e;
    --gray-800: #2c3a47;
    --gray-700: #34495e;
    --gray-500: #718093;
    --gray-300: #a4b0be;
    --gray-100: #dfe4ea;
    
    --text-primary: #ffffff;
    --text-secondary: #a4b0be;
    
    /* Typographie */
    --font-heading: 'Orbitron', sans-serif;
    --font-body: 'Rajdhani', sans-serif;
    
    /* Espacements */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
}

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

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

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

.header {
    position: relative;
    min-height: 100vh;
    background: linear-gradient(135deg, var(--darker-bg) 0%, var(--dark-blue) 100%);
    overflow: hidden;
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md) var(--spacing-lg);
    position: relative;
    z-index: 100;
    background: rgba(10, 14, 39, 0.8);
    backdrop-filter: blur(10px);
    border-bottom: 2px solid rgba(0, 168, 255, 0.2);
}

.logo h1 {
    font-family: var(--font-heading);
    font-size: 2rem;
    font-weight: 900;
    letter-spacing: 3px;
    color: var(--text-primary);
    text-transform: uppercase;
}

.logo .highlight {
    color: var(--primary-blue);
    text-shadow: 0 0 20px rgba(0, 168, 255, 0.8);
}

.logo-subtitle {
    font-size: 0.75rem;
    letter-spacing: 2px;
    color: var(--gray-300);
    text-transform: uppercase;
    margin-top: -5px;
}

.nav-menu {
    display: flex;
    gap: var(--spacing-lg);
    list-style: none;
    align-items: center;
}

.nav-menu a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 600;
    font-size: 1.1rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    transition: var(--transition-base);
    position: relative;
}

.nav-menu a:hover {
    color: var(--primary-blue);
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--primary-blue), var(--accent-cyan));
    transition: width var(--transition-base);
}

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

.btn-primary {
    background: linear-gradient(135deg, var(--primary-blue), var(--secondary-blue));
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: 5px;
    box-shadow: 0 5px 15px rgba(0, 168, 255, 0.3);
    transition: var(--transition-base);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(0, 168, 255, 0.5);
}

/* ========================================
   HERO SECTION
   ======================================== */

.hero {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: calc(100vh - 80px);
    text-align: center;
    padding: var(--spacing-2xl) var(--spacing-md);
    background: 
        radial-gradient(circle at 20% 50%, rgba(0, 168, 255, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(0, 210, 211, 0.15) 0%, transparent 50%),
        linear-gradient(135deg, var(--darker-bg) 0%, var(--dark-blue) 100%);
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        repeating-linear-gradient(90deg, transparent, transparent 2px, rgba(0, 168, 255, 0.03) 2px, rgba(0, 168, 255, 0.03) 4px),
        repeating-linear-gradient(0deg, transparent, transparent 2px, rgba(0, 168, 255, 0.03) 2px, rgba(0, 168, 255, 0.03) 4px);
    opacity: 0.5;
    animation: gridMove 20s linear infinite;
}

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

.hero-content {
    position: relative;
    z-index: 10;
    max-width: 900px;
}

.hero-tag {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-md);
    background: rgba(0, 168, 255, 0.1);
    border: 2px solid var(--primary-blue);
    border-radius: 30px;
    color: var(--primary-blue);
    font-weight: 700;
    font-size: 0.9rem;
    letter-spacing: 2px;
    text-transform: uppercase;
    margin-bottom: var(--spacing-md);
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { box-shadow: 0 0 0 0 rgba(0, 168, 255, 0.7); }
    50% { box-shadow: 0 0 0 15px rgba(0, 168, 255, 0); }
}

.hero-title {
    font-family: var(--font-heading);
    font-size: 5rem;
    font-weight: 900;
    line-height: 1.1;
    letter-spacing: 5px;
    text-transform: uppercase;
    margin-bottom: var(--spacing-md);
    background: linear-gradient(135deg, #ffffff 0%, var(--primary-blue) 50%, var(--accent-cyan) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: gradientShift 3s ease infinite;
}

@keyframes gradientShift {
    0%, 100% { filter: hue-rotate(0deg); }
    50% { filter: hue-rotate(20deg); }
}

.hero-location {
    display: block;
    font-size: 3.5rem;
    color: var(--text-primary);
    -webkit-text-fill-color: var(--text-primary);
    text-shadow: 0 0 30px rgba(0, 168, 255, 0.6);
}

.hero-description {
    font-size: 1.3rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xl);
    font-weight: 400;
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
}

.btn-hero-primary,
.btn-hero-secondary {
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: 8px;
    text-decoration: none;
    font-weight: 700;
    font-size: 1.1rem;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    transition: var(--transition-base);
    position: relative;
    overflow: hidden;
}

.btn-hero-primary {
    background: linear-gradient(135deg, var(--primary-blue), var(--secondary-blue));
    color: var(--text-primary);
    box-shadow: 0 10px 30px rgba(0, 168, 255, 0.4);
}

.btn-hero-primary::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    transition: left 0.5s ease;
}

.btn-hero-primary:hover::before {
    left: 100%;
}

.btn-hero-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 40px rgba(0, 168, 255, 0.6);
}

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

.btn-hero-secondary:hover {
    background: rgba(0, 168, 255, 0.1);
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(0, 168, 255, 0.3);
}

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

section {
    padding: var(--spacing-2xl) 0;
    position: relative;
}

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

.section-tag {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-md);
    background: rgba(0, 168, 255, 0.1);
    border-left: 3px solid var(--primary-blue);
    color: var(--primary-blue);
    font-weight: 700;
    font-size: 0.85rem;
    letter-spacing: 2px;
    text-transform: uppercase;
    margin-bottom: var(--spacing-sm);
}

.section-title {
    font-family: var(--font-heading);
    font-size: 3rem;
    font-weight: 700;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: var(--text-primary);
}

.section-title .highlight {
    color: var(--primary-blue);
    position: relative;
}

.section-title .highlight::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 100%;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-blue), var(--accent-cyan));
}

/* ========================================
   SECTION ABOUT
   ======================================== */

.section-about {
    background: linear-gradient(180deg, var(--darker-bg) 0%, var(--dark-bg) 100%);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    align-items: center;
}

.about-text .lead-text {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--gray-100);
    margin-bottom: var(--spacing-md);
    line-height: 1.8;
}

.about-text p {
    font-size: 1.1rem;
    color: var(--text-secondary);
    line-height: 1.8;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
}

.stat-card {
    background: var(--card-bg);
    padding: var(--spacing-lg);
    border-radius: 12px;
    text-align: center;
    border: 1px solid rgba(0, 168, 255, 0.2);
    transition: var(--transition-base);
    position: relative;
    overflow: hidden;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-blue), var(--accent-cyan));
    transform: scaleX(0);
    transition: transform var(--transition-base);
}

.stat-card:hover::before {
    transform: scaleX(1);
}

.stat-card:hover {
    background: var(--card-hover);
    border-color: var(--primary-blue);
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 168, 255, 0.2);
}

.stat-number {
    font-family: var(--font-heading);
    font-size: 3rem;
    font-weight: 900;
    color: var(--primary-blue);
    text-shadow: 0 0 20px rgba(0, 168, 255, 0.5);
    margin-bottom: var(--spacing-xs);
}

.stat-label {
    font-size: 1rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* ========================================
   SECTION PROGRAMME
   ======================================== */

.section-programme {
    background: var(--dark-bg);
    position: relative;
}

.section-programme::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 1px;
    height: 100%;
    background: linear-gradient(180deg, 
        transparent 0%, 
        rgba(0, 168, 255, 0.5) 20%, 
        rgba(0, 168, 255, 0.5) 80%, 
        transparent 100%);
}

.programme-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
}

.day-card {
    background: var(--card-bg);
    padding: var(--spacing-lg);
    border-radius: 12px;
    border: 1px solid rgba(0, 168, 255, 0.2);
    transition: var(--transition-base);
    position: relative;
}

.day-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 5px;
    background: linear-gradient(90deg, var(--primary-blue), var(--accent-cyan));
    border-radius: 12px 12px 0 0;
    opacity: 0;
    transition: opacity var(--transition-base);
}

.day-card:hover::before {
    opacity: 1;
}

.day-card:hover {
    border-color: var(--primary-blue);
    transform: translateY(-10px);
    box-shadow: 0 15px 40px rgba(0, 168, 255, 0.3);
}

.day-header {
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-md);
    border-bottom: 2px solid rgba(0, 168, 255, 0.2);
}

.day-number {
    font-family: var(--font-heading);
    font-size: 3rem;
    font-weight: 900;
    color: var(--primary-blue);
    opacity: 0.3;
    line-height: 1;
}

.day-title {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: var(--spacing-xs) 0;
}

.day-subtitle {
    color: var(--text-secondary);
    font-size: 0.95rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.day-schedule {
    list-style: none;
}

.day-schedule li {
    padding: var(--spacing-sm) 0;
    color: var(--text-secondary);
    font-size: 1rem;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.day-schedule li:last-child {
    border-bottom: none;
}

.time {
    font-family: var(--font-heading);
    color: var(--primary-blue);
    font-weight: 700;
    font-size: 0.9rem;
    min-width: 60px;
}

/* ========================================
   SECTION EXPOSANTS
   ======================================== */

.section-exposants {
    background: linear-gradient(180deg, var(--dark-bg) 0%, var(--darker-bg) 100%);
}

.exposants-categories {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
}

.category-card {
    background: var(--card-bg);
    padding: var(--spacing-lg);
    border-radius: 12px;
    text-align: center;
    border: 1px solid rgba(0, 168, 255, 0.2);
    transition: var(--transition-base);
    position: relative;
    overflow: hidden;
}

.category-card::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(0, 168, 255, 0.2) 0%, transparent 70%);
    transform: translate(-50%, -50%);
    transition: width 0.6s ease, height 0.6s ease;
}

.category-card:hover::after {
    width: 300px;
    height: 300px;
}

.category-card:hover {
    border-color: var(--primary-blue);
    transform: translateY(-8px) scale(1.02);
    box-shadow: 0 15px 40px rgba(0, 168, 255, 0.3);
}

.category-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
    filter: grayscale(100%) brightness(0.8);
    transition: var(--transition-base);
    position: relative;
    z-index: 1;
}

.category-card:hover .category-icon {
    filter: grayscale(0%) brightness(1);
    transform: scale(1.2);
}

.category-card h3 {
    font-family: var(--font-heading);
    font-size: 1.3rem;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
    position: relative;
    z-index: 1;
}

.category-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
    position: relative;
    z-index: 1;
}
/* ========================================
   SECTION GALERIE
   ======================================== */

.section-galerie {
    background: var(--dark-bg);
    padding: var(--spacing-2xl) 0;
}

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-xl);
}

.gallery-item {
    position: relative;
    aspect-ratio: 16 / 9;
    overflow: hidden;
    border-radius: 12px;
    border: 2px solid rgba(0, 168, 255, 0.2);
    cursor: pointer;
    transition: var(--transition-base);
}

.gallery-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.gallery-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, 
        rgba(0, 168, 255, 0.8) 0%, 
        rgba(0, 210, 211, 0.6) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity var(--transition-base);
}

.gallery-icon {
    font-size: 3rem;
    transform: scale(0);
    transition: transform 0.3s ease 0.1s;
}

.gallery-item:hover {
    border-color: var(--primary-blue);
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0, 168, 255, 0.4);
}

.gallery-item:hover img {
    transform: scale(1.1);
}

.gallery-item:hover .gallery-overlay {
    opacity: 1;
}

.gallery-item:hover .gallery-icon {
    transform: scale(1);
}

/* Responsive Galerie */
@media (max-width: 768px) {
    .gallery-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-sm);
    }
    
    .gallery-item {
        aspect-ratio: 4 / 3;
    }
}

/* ========================================
   SECTION CONTACT
   ======================================== */

.section-contact {
    background: var(--darker-bg);
    padding: var(--spacing-2xl) 0;
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
}

.contact-info h2 {
    font-family: var(--font-heading);
    font-size: 2.5rem;
    margin-bottom: var(--spacing-lg);
}

.info-block {
    margin-bottom: var(--spacing-lg);
    padding: var(--spacing-md);
    background: var(--card-bg);
    border-left: 4px solid var(--primary-blue);
    border-radius: 8px;
    transition: var(--transition-base);
}

.info-block:hover {
    background: var(--card-hover);
    transform: translateX(10px);
}

.info-block h3 {
    font-size: 1.2rem;
    color: var(--primary-blue);
    margin-bottom: var(--spacing-sm);
}

.info-block p {
    color: var(--text-secondary);
    line-height: 1.8;
}

.contact-form-wrapper {
    background: var(--card-bg);
    padding: var(--spacing-xl);
    border-radius: 12px;
    border: 1px solid rgba(0, 168, 255, 0.2);
}

.contact-form-wrapper h3 {
    font-family: var(--font-heading);
    font-size: 1.8rem;
    margin-bottom: var(--spacing-lg);
}

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

.form-group input,
.form-group select {
    width: 100%;
    padding: var(--spacing-md);
    background: var(--darker-bg);
    border: 2px solid rgba(0, 168, 255, 0.2);
    border-radius: 8px;
    color: var(--text-primary);
    font-family: var(--font-body);
    font-size: 1rem;
    transition: var(--transition-base);
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary-blue);
    box-shadow: 0 0 15px rgba(0, 168, 255, 0.3);
}

.form-group input::placeholder {
    color: var(--gray-500);
}

.btn-submit {
    padding: var(--spacing-md) var(--spacing-lg);
    background: linear-gradient(135deg, var(--primary-blue), var(--secondary-blue));
    border: none;
    border-radius: 8px;
    color: var(--text-primary);
    font-family: var(--font-body);
    font-size: 1.1rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    cursor: pointer;
    transition: var(--transition-base);
    box-shadow: 0 5px 20px rgba(0, 168, 255, 0.3);
}

.btn-submit:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(0, 168, 255, 0.5);
}

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

.footer {
    background: var(--darker-bg);
    border-top: 2px solid rgba(0, 168, 255, 0.2);
    padding: var(--spacing-xl) 0 var(--spacing-md);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-lg);
}

.footer-section h3,
.footer-section h4 {
    font-family: var(--font-heading);
    color: var(--primary-blue);
    margin-bottom: var(--spacing-sm);
}

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

.footer-section a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition-fast);
    display: inline-block;
    margin-bottom: var(--spacing-xs);
}

.footer-section a:hover {
    color: var(--primary-blue);
    transform: translateX(5px);
}

.social-links {
    display: flex;
    gap: var(--spacing-md);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-md);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--gray-500);
    font-size: 0.9rem;
}

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

@media (max-width: 768px) {
    /* Navigation mobile */
    .nav-menu {
        flex-direction: column;
        gap: var(--spacing-sm);
        display: none; /* À améliorer avec un menu burger */
    }
    
    /* Hero */
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-location {
        font-size: 2rem;
    }
    
    .hero-buttons {
        flex-direction: column;
    }
    
    /* About section */
    .about-content {
        grid-template-columns: 1fr;
    }
    
    .stats-grid {
        grid-template-columns: 1fr 1fr;
    }
    
    /* Programme */
    .programme-grid {
        grid-template-columns: 1fr;
    }
    
    /* Exposants */
    .exposants-categories {
        grid-template-columns: 1fr;
    }
    
    /* Contact */
    .contact-grid {
        grid-template-columns: 1fr;
    }
    
    /* Footer */
    .footer-content {
        flex-direction: column;
        text-align: center;
    }
    
    .social-links {
        justify-content: center;
    }
    
    /* Typographie responsive */
    .section-title {
        font-size: 2rem;
    }
    
    .container {
        padding: 0 var(--spacing-sm);
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .stat-number {
        font-size: 2.5rem;
    }
}