/* ===== VARIABLES CSS ===== */
:root {
    /* Couleurs principales */
    --color-bg-primary: #0a0a0a;
    --color-bg-secondary: #141414;
    --color-bg-tertiary: #1a1a1a;
    --color-bg-card: #1f1f1f;
    --color-text-primary: #ffffff;
    --color-text-secondary: #b0b0b0;
    --color-text-muted: #666666;
    --color-accent-blue: #00d4ff;
    --color-accent-red: #ff0066;
    --color-accent-purple: #8b5cf6;
    --color-accent-green: #00ff88;
    --color-success: #10b981;
    --color-warning: #f59e0b;
    --color-danger: #ef4444;
    
    /* Gradients améliorés */
    --gradient-primary: linear-gradient(135deg, #00d4ff 0%, #8b5cf6 100%);
    --gradient-secondary: linear-gradient(135deg, #ff0066 0%, #8b5cf6 100%);
    --gradient-success: linear-gradient(135deg, #10b981 0%, #00ff88 100%);
    --gradient-text: linear-gradient(135deg, #00d4ff 0%, #ff0066 50%, #8b5cf6 100%);
    --gradient-bg: radial-gradient(circle at 30% 50%, rgba(0, 212, 255, 0.1) 0%, transparent 50%),
                   radial-gradient(circle at 70% 80%, rgba(139, 92, 246, 0.1) 0%, transparent 50%);
    
    /* Spacing amélioré */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    --spacing-3xl: 6rem;
    
    /* Typography */
    --font-primary: 'Orbitron', sans-serif;
    --font-secondary: 'Inter', sans-serif;
    
    /* Shadows professionnelles */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.2);
    --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.3);
    --shadow-2xl: 0 25px 50px rgba(0, 0, 0, 0.5);
    --shadow-glow-blue: 0 0 40px rgba(0, 212, 255, 0.4);
    --shadow-glow-purple: 0 0 40px rgba(139, 92, 246, 0.4);
    
    /* Transitions */
    --transition-base: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-spring: all 0.8s cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* ===== RESET & BASE ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

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

/* Background pattern */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--gradient-bg);
    pointer-events: none;
    z-index: -1;
}

a {
    color: inherit;
    text-decoration: none;
    transition: var(--transition-base);
}

img {
    max-width: 100%;
    height: auto;
    display: block;
    border-radius: 10px;
}

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

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

.text-gradient {
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 700;
}

/* Glass effect */
.glass {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

/* ===== HEADER ENHANCED ===== */
.main-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(10, 10, 10, 0.9);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    z-index: 1000;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    transition: var(--transition-base);
}

.main-header.scrolled {
    background: rgba(10, 10, 10, 0.98);
    box-shadow: var(--shadow-lg);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-sm) var(--spacing-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-family: var(--font-primary);
    font-size: 1.75rem;
    font-weight: 900;
    letter-spacing: 2px;
    position: relative;
}

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

.logo::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 100%;
    height: 2px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transition: var(--transition-base);
}

.logo:hover::after {
    transform: scaleX(1);
}

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

.nav-menu a {
    font-weight: 500;
    position: relative;
    padding: var(--spacing-xs) 0;
    color: var(--color-text-secondary);
    transition: var(--transition-base);
}

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

.nav-menu a.active {
    color: var(--color-accent-blue);
}

.nav-menu a:not(.cta-button):after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: var(--transition-base);
}

.nav-menu a:not(.cta-button):hover:after {
    width: 100%;
}

.cta-button {
    background: var(--gradient-primary);
    padding: var(--spacing-xs) var(--spacing-lg);
    border-radius: 25px;
    font-weight: 600;
    transition: var(--transition-base);
    position: relative;
    overflow: hidden;
}

.cta-button::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.cta-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(0, 212, 255, 0.3);
}

.cta-button:hover::before {
    width: 300px;
    height: 300px;
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    cursor: pointer;
}

.mobile-menu-toggle span {
    width: 25px;
    height: 2px;
    background: var(--color-text-primary);
    transition: var(--transition-base);
}

/* ===== HERO SECTION ENHANCED ===== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-3xl) var(--spacing-md);
    padding-top: calc(80px + var(--spacing-3xl));
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle, rgba(0, 212, 255, 0.2) 0%, transparent 70%);
    animation: rotate 20s linear infinite;
}

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

.hero-content {
    flex: 1;
    max-width: 650px;
    z-index: 2;
    animation: slide-in-left 1s ease-out;
}

@keyframes slide-in-left {
    from {
        opacity: 0;
        transform: translateX(-50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.launch-badge {
    display: inline-flex;
    align-items: center;
    background: rgba(139, 92, 246, 0.2);
    border: 1px solid var(--color-accent-purple);
    color: var(--color-accent-purple);
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: 50px;
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: var(--spacing-lg);
    animation: pulse 2s ease-in-out infinite;
}

.hero-title {
    font-family: var(--font-primary);
    font-size: clamp(3.5rem, 8vw, 6rem);
    font-weight: 900;
    line-height: 1.1;
    margin-bottom: var(--spacing-lg);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.hero-title span {
    display: inline-block;
    animation: text-reveal 1s ease-out forwards;
    opacity: 0;
}

.hero-title span:nth-child(2) {
    animation-delay: 0.2s;
}

.hero-title span:nth-child(3) {
    animation-delay: 0.4s;
}

@keyframes text-reveal {
    to {
        opacity: 1;
        transform: translateY(0);
    }
    from {
        opacity: 0;
        transform: translateY(30px);
    }
}

.hero-subtitle {
    font-size: 1.375rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-xl);
    line-height: 1.8;
    max-width: 500px;
}

.hero-cta {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    background: var(--gradient-primary);
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: 50px;
    font-weight: 700;
    font-size: 1.125rem;
    transition: var(--transition-spring);
    position: relative;
    overflow: hidden;
    box-shadow: 0 4px 15px rgba(0, 212, 255, 0.3);
}

.hero-cta:hover {
    transform: translateY(-3px) scale(1.02);
    box-shadow: 0 15px 40px rgba(0, 212, 255, 0.4);
}

.hero-cta svg {
    transition: var(--transition-base);
}

.hero-cta:hover svg {
    transform: translateX(5px);
}

/* Phone Mockup Enhanced */
.hero-visual {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
    animation: slide-in-right 1s ease-out;
}

@keyframes slide-in-right {
    from {
        opacity: 0;
        transform: translateX(50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.phone-mockup {
    width: 320px;
    height: 640px;
    background: linear-gradient(135deg, #222 0%, #333 100%);
    border-radius: 40px;
    padding: 10px;
    position: relative;
    box-shadow: 
        0 0 0 1px rgba(255, 255, 255, 0.1),
        0 20px 60px rgba(0, 212, 255, 0.3),
        inset 0 0 20px rgba(255, 255, 255, 0.05);
    transform: rotate(5deg);
    animation: float 6s ease-in-out infinite;
}

/* Fix pour mobile - pas de parallax */
@media (max-width: 768px) {
    .hero-visual {
        position: relative;
        transform: none !important;
    }
    
    .phone-mockup {
        transform: rotate(0);
        animation: none;
    }
}

.phone-screen {
    width: 100%;
    height: 100%;
    background: #000;
    border-radius: 30px;
    overflow: hidden;
    position: relative;
    box-shadow: inset 0 0 30px rgba(0, 212, 255, 0.2);
}

.phone-screen video,
.phone-screen img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.phone-notch {
    position: absolute;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    width: 150px;
    height: 25px;
    background: #222;
    border-radius: 15px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.5);
}

/* Demo content dans le téléphone */
.demo-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    text-align: center;
    padding: var(--spacing-xl);
    background: radial-gradient(circle at center, rgba(139, 92, 246, 0.2) 0%, rgba(0, 212, 255, 0.2) 50%, transparent 70%);
}

.demo-emoji {
    font-size: 4rem;
    margin-bottom: var(--spacing-md);
    animation: bounce 2s ease-in-out infinite;
}

.demo-content p {
    color: var(--color-text-primary);
    font-size: 1.1rem;
    font-weight: 600;
    font-family: var(--font-primary);
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Fix video display */
.phone-screen video {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

/* Floating Shapes Enhanced */
.floating-shapes {
    position: absolute;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

.shape {
    position: absolute;
    border-radius: 50%;
    filter: blur(60px);
    opacity: 0.4;
}

.shape-1 {
    width: 400px;
    height: 400px;
    background: var(--color-accent-blue);
    top: -150px;
    right: -150px;
    animation: float-shape 8s ease-in-out infinite;
}

.shape-2 {
    width: 300px;
    height: 300px;
    background: var(--color-accent-purple);
    bottom: -100px;
    left: -100px;
    animation: float-shape 10s ease-in-out infinite reverse;
}

.shape-3 {
    width: 200px;
    height: 200px;
    background: var(--color-accent-red);
    top: 50%;
    left: 50%;
    animation: float-shape 6s ease-in-out infinite;
}

/* ===== SECTIONS ENHANCED ===== */
section {
    position: relative;
    z-index: 1;
}

.section-title {
    font-family: var(--font-primary);
    font-size: clamp(2.5rem, 5vw, 3.5rem);
    text-align: center;
    margin-bottom: var(--spacing-2xl);
    position: relative;
    display: inline-block;
    width: 100%;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: var(--gradient-primary);
    border-radius: 2px;
}

/* Concept Section Enhanced */
.concept-section {
    padding: var(--spacing-3xl) 0;
    background: var(--color-bg-secondary);
    position: relative;
}

.concept-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: var(--gradient-primary);
    opacity: 0.3;
}

.section-intro {
    text-align: center;
    max-width: 800px;
    margin: 0 auto var(--spacing-2xl);
    color: var(--color-text-secondary);
    font-size: 1.25rem;
    line-height: 1.8;
}

.concept-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-lg);
}

.concept-card {
    background: var(--color-bg-card);
    padding: var(--spacing-2xl);
    border-radius: 25px;
    text-align: center;
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: var(--transition-base);
    position: relative;
    overflow: hidden;
}

.concept-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-primary);
    transform: translateX(-100%);
    transition: var(--transition-base);
}

.concept-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 30px 60px rgba(0, 0, 0, 0.5);
    border-color: rgba(0, 212, 255, 0.3);
}

.concept-card:hover::before {
    transform: translateX(0);
}

.concept-icon {
    font-size: 4rem;
    margin-bottom: var(--spacing-md);
    display: inline-block;
    animation: float 3s ease-in-out infinite;
}

.concept-card:nth-child(2) .concept-icon {
    animation-delay: 0.5s;
}

.concept-card:nth-child(3) .concept-icon {
    animation-delay: 1s;
}

.concept-card h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
    font-weight: 700;
}

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

/* How it Works Enhanced */
.how-it-works {
    padding: var(--spacing-3xl) 0;
    background: var(--color-bg-primary);
    position: relative;
    overflow: hidden;
}

.how-it-works::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(0, 212, 255, 0.05) 0%, transparent 70%);
}

.steps-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
    position: relative;
}

.step {
    background: var(--color-bg-tertiary);
    padding: var(--spacing-2xl);
    border-radius: 25px;
    text-align: center;
    transition: var(--transition-base);
    border: 1px solid rgba(255, 255, 255, 0.05);
    position: relative;
    overflow: hidden;
}

.step::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(139, 92, 246, 0.1) 0%, transparent 70%);
    opacity: 0;
    transition: var(--transition-base);
}

.step:hover {
    transform: translateY(-15px) scale(1.02);
    border-color: var(--color-accent-blue);
    box-shadow: 0 30px 60px rgba(0, 212, 255, 0.2);
}

.step:hover::before {
    opacity: 1;
}

.step-number {
    font-family: var(--font-primary);
    font-size: 3.5rem;
    font-weight: 900;
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--spacing-md);
    line-height: 1;
}

.step h3 {
    font-size: 1.375rem;
    margin-bottom: var(--spacing-sm);
    font-weight: 700;
}

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

/* Early Stage Section Enhanced */
.early-stage {
    padding: var(--spacing-3xl) 0;
    background: var(--color-bg-secondary);
    position: relative;
}

.early-content {
    text-align: center;
    max-width: 900px;
    margin: 0 auto;
}

.early-content h2 {
    font-size: 3rem;
    margin-bottom: var(--spacing-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
}

.early-content > p {
    font-size: 1.25rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-2xl);
    line-height: 1.8;
}

.early-features {
    display: flex;
    justify-content: center;
    gap: var(--spacing-2xl);
    margin-bottom: var(--spacing-2xl);
    flex-wrap: wrap;
}

.feature {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid rgba(16, 185, 129, 0.3);
    border-radius: 50px;
    transition: var(--transition-base);
}

.feature:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(16, 185, 129, 0.2);
}

.check {
    color: var(--color-success);
    font-size: 1.5rem;
}

.early-cta {
    display: inline-block;
    background: var(--gradient-success);
    color: var(--color-text-primary);
    padding: var(--spacing-md) var(--spacing-2xl);
    border-radius: 50px;
    font-weight: 700;
    font-size: 1.25rem;
    transition: var(--transition-spring);
    box-shadow: 0 4px 15px rgba(16, 185, 129, 0.3);
}

.early-cta:hover {
    transform: translateY(-3px) scale(1.05);
    box-shadow: 0 20px 40px rgba(16, 185, 129, 0.4);
}

/* Contact Section Enhanced */
.contact-section {
    padding: var(--spacing-3xl) 0;
    background: var(--color-bg-primary);
}

.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-lg);
    max-width: 900px;
    margin: 0 auto;
}

.contact-card {
    background: linear-gradient(135deg, var(--color-bg-tertiary) 0%, var(--color-bg-secondary) 100%);
    padding: var(--spacing-2xl);
    border-radius: 30px;
    text-align: center;
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: var(--transition-base);
    position: relative;
    overflow: hidden;
}

.contact-card::before {
    content: '';
    position: absolute;
    top: -2px;
    left: -2px;
    right: -2px;
    bottom: -2px;
    background: var(--gradient-primary);
    border-radius: 30px;
    opacity: 0;
    z-index: -1;
    transition: var(--transition-base);
}

.contact-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 30px 60px rgba(0, 0, 0, 0.5);
}

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

.contact-card h3 {
    font-size: 1.75rem;
    margin-bottom: var(--spacing-md);
    font-weight: 700;
}

.contact-card p {
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-lg);
    line-height: 1.8;
}

.contact-btn {
    display: inline-block;
    background: var(--gradient-primary);
    color: var(--color-text-primary);
    padding: var(--spacing-sm) var(--spacing-xl);
    border-radius: 30px;
    font-weight: 600;
    transition: var(--transition-base);
}

.contact-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(0, 212, 255, 0.3);
}

/* Footer Enhanced */
.main-footer {
    background: var(--color-bg-secondary);
    padding: var(--spacing-3xl) 0 var(--spacing-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    position: relative;
}

.main-footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: var(--gradient-primary);
    opacity: 0.5;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: var(--spacing-2xl);
    margin-bottom: var(--spacing-2xl);
}

.footer-brand .logo {
    font-family: var(--font-primary);
    font-size: 1.75rem;
    font-weight: 900;
    margin-bottom: var(--spacing-sm);
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

.footer-stage {
    font-size: 0.875rem;
    color: var(--color-accent-purple);
    margin-top: var(--spacing-xs);
    font-weight: 600;
}

.footer-links h4,
.footer-social h4 {
    margin-bottom: var(--spacing-md);
    font-weight: 700;
    font-size: 1.125rem;
}

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

.footer-links li {
    margin-bottom: var(--spacing-xs);
}

.footer-links a {
    color: var(--color-text-secondary);
    transition: var(--transition-base);
    position: relative;
}

.footer-links a::before {
    content: '→';
    position: absolute;
    left: -20px;
    opacity: 0;
    transition: var(--transition-base);
}

.footer-links a:hover {
    color: var(--color-accent-blue);
    padding-left: 20px;
}

.footer-links a:hover::before {
    opacity: 1;
    left: 0;
}

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

.social-links a,
.social-soon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 50%;
    font-size: 1.25rem;
    transition: var(--transition-base);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.social-links a:hover {
    transform: translateY(-5px) rotate(360deg);
    background: var(--gradient-primary);
    box-shadow: 0 10px 30px rgba(0, 212, 255, 0.3);
}

.social-soon {
    width: auto;
    padding: 0 var(--spacing-md);
    border-radius: 20px;
    font-size: 0.875rem;
    color: var(--color-text-muted);
    cursor: not-allowed;
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    color: var(--color-text-secondary);
}

/* ===== CHALLENGE CARDS ENHANCED ===== */
.challenge-item {
    background: var(--color-bg-secondary);
    border-radius: 25px;
    overflow: hidden;
    transition: var(--transition-base);
    border: 1px solid rgba(255, 255, 255, 0.05);
    display: flex;
    flex-direction: column;
    position: relative;
}

.challenge-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, transparent 0%, rgba(0, 212, 255, 0.1) 100%);
    opacity: 0;
    transition: var(--transition-base);
    pointer-events: none;
}

.challenge-item:hover {
    transform: translateY(-10px) scale(1.02);
    box-shadow: 0 30px 60px rgba(0, 0, 0, 0.5);
    border-color: var(--color-accent-blue);
}

.challenge-item:hover::before {
    opacity: 1;
}

.challenge-header {
    position: relative;
    height: 180px;
    overflow: hidden;
    background: var(--color-bg-tertiary);
}

.challenge-header img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    transition: var(--transition-slow);
}

.challenge-item:hover .challenge-header img {
    transform: scale(1.1);
    filter: brightness(1.1);
}

.challenge-badges {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    display: flex;
    gap: var(--spacing-xs);
    flex-wrap: wrap;
}

.badge {
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.badge-new {
    background: rgba(0, 212, 255, 0.9);
    color: var(--color-text-primary);
}

.badge-hot {
    background: rgba(255, 0, 102, 0.9);
    color: var(--color-text-primary);
    animation: pulse 1.5s ease-in-out infinite;
}

.badge-premium {
    background: var(--gradient-primary);
    color: var(--color-text-primary);
}

.badge-urgent {
    background: rgba(245, 158, 11, 0.9);
    color: var(--color-bg-primary);
}

.challenge-content {
    padding: var(--spacing-lg);
    display: flex;
    flex-direction: column;
    flex-grow: 1;
}

.challenge-content h3 {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-xs);
    font-weight: 700;
    line-height: 1.3;
}

.challenge-content p {
    color: var(--color-text-secondary);
    line-height: 1.6;
    margin-bottom: var(--spacing-sm);
    flex-grow: 1;
    font-size: 0.95rem;
}

.challenge-details {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
    padding: var(--spacing-md);
    background: rgba(255, 255, 255, 0.02);
    border-radius: 15px;
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.detail-item {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.detail-label {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.detail-value {
    font-weight: 600;
    color: var(--color-text-primary);
}

.challenge-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-sm);
    margin-top: auto;
    padding-top: var(--spacing-md);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.reward {
    font-size: 1.375rem;
    font-weight: 700;
    color: var(--color-success);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.deadline {
    font-size: 1rem;
    color: var(--color-warning);
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.participate-btn {
    background: var(--gradient-primary);
    color: var(--color-text-primary);
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: 30px;
    font-weight: 600;
    transition: var(--transition-spring);
    white-space: nowrap;
    position: relative;
    overflow: hidden;
}

.participate-btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.participate-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 35px rgba(0, 212, 255, 0.4);
}

.participate-btn:hover::before {
    width: 200px;
    height: 200px;
}

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

@keyframes float {
    0%, 100% {
        transform: rotate(5deg) translateY(0);
    }
    50% {
        transform: rotate(5deg) translateY(-20px);
    }
}

@keyframes float-shape {
    0%, 100% {
        transform: translate(0, 0) scale(1);
    }
    25% {
        transform: translate(30px, -30px) scale(1.1);
    }
    50% {
        transform: translate(-20px, 20px) scale(0.9);
    }
    75% {
        transform: translate(-30px, -10px) scale(1.05);
    }
}

@keyframes shimmer {
    0% {
        background-position: -100% 0;
    }
    100% {
        background-position: 100% 0;
    }
}

/* Ripple Effect */
.ripple {
    position: absolute;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.5);
    transform: scale(0);
    animation: ripple-animation 0.6s ease-out;
    pointer-events: none;
}

@keyframes ripple-animation {
    to {
        transform: scale(4);
        opacity: 0;
    }
}

/* Glow Effects */
.glow-blue {
    box-shadow: 0 0 40px rgba(0, 212, 255, 0.4);
}

.glow-purple {
    box-shadow: 0 0 40px rgba(139, 92, 246, 0.4);
}

.glow-success {
    box-shadow: 0 0 40px rgba(16, 185, 129, 0.4);
}

/* Text Animations */
.text-shimmer {
    background: linear-gradient(90deg, 
        var(--color-text-primary) 0%, 
        rgba(255, 255, 255, 0.8) 50%, 
        var(--color-text-primary) 100%);
    background-size: 200% 100%;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: shimmer 3s linear infinite;
}

/* Scroll Animations */
.scroll-fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

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

/* Loading Animation */
@keyframes loading {
    0% {
        transform: rotate(0deg);
    }
    100% {
        transform: rotate(360deg);
    }
}

.loading-spinner {
    width: 40px;
    height: 40px;
    border: 3px solid rgba(255, 255, 255, 0.1);
    border-top-color: var(--color-accent-blue);
    border-radius: 50%;
    animation: loading 0.8s linear infinite;
}

/* ===== RESPONSIVE DESIGN ===== */
@media (max-width: 1024px) {
    .hero {
        flex-direction: column;
        text-align: center;
        padding: var(--spacing-2xl) var(--spacing-md);
        min-height: auto;
    }
    
    .hero-content {
        margin-bottom: var(--spacing-2xl);
        max-width: 100%;
    }
    
    .hero-title {
        font-size: clamp(3rem, 8vw, 4rem);
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
        gap: var(--spacing-xl);
    }
}

@media (max-width: 768px) {
    /* Fix pour Safari iOS */
    body {
        -webkit-text-size-adjust: 100%;
    }
    
    .main-header {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        z-index: 9999;
    }
    
    .hero {
        padding-top: calc(60px + var(--spacing-xl));
    }
    
    .nav-menu {
        position: fixed;
        top: 60px;
        left: 0;
        right: 0;
        background: var(--color-bg-primary);
        flex-direction: column;
        padding: var(--spacing-lg);
        transform: translateY(-150%);
        transition: var(--transition-base);
        box-shadow: var(--shadow-xl);
        z-index: 9998;
    }
    
    .nav-menu.active {
        transform: translateY(0);
    }
    
    .mobile-menu-toggle {
        display: flex;
        z-index: 10000;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-title span {
        display: block;
    }
    
    .phone-mockup {
        width: 250px;
        height: 500px;
    }
    
    .concept-grid,
    .steps-grid {
        grid-template-columns: 1fr;
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
    }
    
    .social-links {
        justify-content: center;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .challenge-details {
        grid-template-columns: 1fr;
    }
    
    /* Fix pour les shapes sur mobile */
    .floating-shapes {
        display: none;
    }
    
    /* Fix pour video mobile */
    .phone-screen video {
        width: 100%;
        height: 100%;
        object-fit: cover;
    }
}

@media (max-width: 480px) {
    .hero {
        padding: var(--spacing-lg);
        padding-top: calc(60px + var(--spacing-lg));
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .hero-cta {
        font-size: 0.9rem;
        padding: var(--spacing-sm) var(--spacing-md);
    }
    
    .phone-mockup {
        width: 200px;
        height: 400px;
    }
    
    .section-title {
        font-size: 1.75rem;
    }
}

/* Fix Safari iOS specific */
@supports (-webkit-touch-callout: none) {
    .hero {
        min-height: -webkit-fill-available;
    }
    
    .phone-screen video {
        -webkit-transform: translateZ(0);
    }
}

/* ===== UTILITIES FOR DARK MODE ===== */
@media (prefers-color-scheme: light) {
    :root {
        --color-bg-primary: #ffffff;
        --color-bg-secondary: #f9fafb;
        --color-bg-tertiary: #f3f4f6;
        --color-text-primary: #111827;
        --color-text-secondary: #6b7280;
    }
}

/* ===== PRINT STYLES ===== */
@media print {
    .main-header,
    .main-footer,
    .floating-shapes,
    .mobile-menu-toggle {
        display: none;
    }
    
    body {
        background: white;
        color: black;
    }
}