/* ===== VARIABLES CSS GLOBALES ===== */
:root {
    --navy-primary: #0a1628;
    --navy-secondary: #1a2747;
    --navy-light: #2d4a73;
    --electric-blue: #00d4ff;
    --electric-blue-light: #4de6ff;
    --pure-white: #ffffff;
    --off-white: #f8fafc;
    --light-gray: #e2e8f0;
    --medium-gray: #64748b;
    --glass: rgba(255,255,255,0.08);
    --glass-strong: rgba(255,255,255,0.12);
    --glass-border: rgba(0,212,255,0.2);
    --shadow-glow: rgba(0,212,255,0.15);
    --shadow-strong: rgba(0,212,255,0.25);
    --font-main: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --transition-smooth: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    --transition-spring: all 0.6s cubic-bezier(0.34, 1.56, 0.64, 1);
    --border-radius: 16px;
    --border-radius-small: 8px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-main);
    background: linear-gradient(135deg, var(--navy-primary) 0%, var(--navy-secondary) 50%, var(--navy-light) 100%);
    background-attachment: fixed;
    color: var(--pure-white);
    overflow-x: hidden;
    font-weight: 400;
    letter-spacing: -0.01em;
    line-height: 1.6;
}

/* ===== PRÉCHARGEUR ÉLÉGANT ===== */
#preloader {
    position: fixed;
    inset: 0;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--navy-primary);
    transition: opacity 0.8s ease-in-out, visibility 0.8s ease-in-out;
    visibility: visible;
    opacity: 1;
}

#preloader.hidden {
    opacity: 0;
    visibility: hidden;
}

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

.loader-logo {
    font-size: 2.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--electric-blue) 0%, var(--electric-blue-light) 100%);
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 2rem;
    animation: pulse 2s ease-in-out infinite;
}

.loader-progress {
    width: 200px;
    height: 2px;
    background: rgba(255,255,255,0.1);
    border-radius: 1px;
    margin: 0 auto;
    overflow: hidden;
}

.loader-bar {
    width: 0%;
    height: 100%;
    background: linear-gradient(90deg, var(--electric-blue), var(--electric-blue-light));
    border-radius: 1px;
    transition: width 0.3s ease;
}

#loader-text {
    font-family: 'Courier New', monospace;
    color: var(--medium-gray);
    font-size: 0.9rem;
    margin-top: 1rem;
    min-height: 1.2rem;
}

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

/* ===== TRANSITIONS DE PAGE ===== */
.page-content {
    opacity: 0;
    transition: opacity 0.8s ease-in;
}

body.ready .page-content {
    opacity: 1;
}

body.is-leaving {
    opacity: 0;
    transition: opacity 0.4s ease-out;
}

/* ===== ANIMATIONS AVANCÉES ===== */
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(60px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeInScale {
    from { opacity: 0; transform: scale(0.95) translateY(30px); }
    to { opacity: 1; transform: scale(1) translateY(0); }
}

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

@keyframes shimmer {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(200%); }
}

@keyframes glow {
    0%, 100% { box-shadow: 0 0 20px var(--shadow-glow); }
    50% { box-shadow: 0 0 40px var(--shadow-strong), 0 0 60px var(--shadow-glow); }
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { transform: translateX(-50%) translateY(0); }
    40% { transform: translateX(-50%) translateY(-10px); }
    60% { transform: translateX(-50%) translateY(-5px); }
}

/* ===== HEADER PREMIUM ===== */
header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 500;
    padding: 1.5rem 0;
    transition: var(--transition-smooth);
    background: rgba(10, 22, 40, 0.1);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid transparent;
}

header.scrolled {
    background: rgba(10, 22, 40, 0.9);
    border-bottom-color: var(--glass-border);
    padding: 1rem 0;
}

.logo {
    font-size: 1.8rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--pure-white) 0%, var(--electric-blue-light) 100%);
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    transition: var(--transition-smooth);
}

.nav-link {
    position: relative;
    color: var(--pure-white);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    transition: var(--transition-smooth);
    padding: 0.5rem 0;
}

.nav-link::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 1px;
    background: var(--electric-blue);
    transition: var(--transition-smooth);
    transform: translateX(-50%);
}

.nav-link:hover {
    color: var(--electric-blue);
}

.nav-link:hover::before {
    width: 100%;
}

/* ===== HERO SECTION PREMIUM ===== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
    padding: 2rem 0;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 20% 80%, var(--electric-blue) 0%, transparent 50%),
                radial-gradient(circle at 80% 20%, var(--electric-blue-light) 0%, transparent 50%);
    opacity: 0.06;
    animation: float 15s ease-in-out infinite alternate;
}

.hero-content {
    position: relative;
    z-index: 10;
    opacity: 0;
    transform: translateY(40px);
    animation: fadeInUp 1.5s ease 0.5s forwards;
}

.hero h1 {
    font-size: clamp(3rem, 8vw, 6rem);
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: 2rem;
    background: linear-gradient(135deg, var(--pure-white) 0%, var(--electric-blue-light) 100%);
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero .subtitle {
    font-size: clamp(1.1rem, 2.5vw, 1.4rem);
    color: var(--light-gray);
    margin-bottom: 3rem;
    max-width: 700px;
    font-weight: 400;
    line-height: 1.7;
}

/* ===== BOUTONS CTA PREMIUM ===== */
.cta-primary {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1.2rem 2.5rem;
    background: linear-gradient(135deg, var(--electric-blue) 0%, var(--electric-blue-light) 100%);
    color: var(--navy-primary);
    text-decoration: none;
    border-radius: var(--border-radius-small);
    font-weight: 600;
    font-size: 1rem;
    transition: var(--transition-spring);
    position: relative;
    overflow: hidden;
    border: none;
    cursor: pointer;
}

.cta-primary::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 50%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
    transform: skewX(-30deg);
    transition: var(--transition-smooth);
}

.cta-primary:hover::before {
    animation: shimmer 0.8s ease;
}

.cta-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 20px 40px var(--shadow-strong);
}

.cta-secondary {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1.2rem 2.5rem;
    background: var(--glass);
    color: var(--pure-white);
    text-decoration: none;
    border-radius: var(--border-radius-small);
    font-weight: 500;
    font-size: 1rem;
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(20px);
    transition: var(--transition-smooth);
}

.cta-secondary:hover {
    background: var(--glass-strong);
    border-color: var(--electric-blue);
    transform: translateY(-2px);
}

/* ===== SECTIONS COMMUNES ===== */
.section {
    padding: 6rem 2rem;
    position: relative;
}

.section-title {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 700;
    text-align: center;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, var(--pure-white) 0%, var(--electric-blue-light) 100%);
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.section-subtitle {
    font-size: 1.2rem;
    color: var(--medium-gray);
    text-align: center;
    margin-bottom: 4rem;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

/* ===== CARTES DE SERVICE PREMIUM ===== */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(380px, 1fr));
    gap: 2rem;
    max-width: 1400px;
    margin: 0 auto;
    perspective: 1000px;
}

.service-card {
    background: var(--glass);
    backdrop-filter: blur(30px);
    border: 1px solid var(--glass-border);
    padding: 3rem 2rem;
    border-radius: var(--border-radius);
    transition: var(--transition-spring);
    position: relative;
    overflow: hidden;
    transform-style: preserve-3d;
    opacity: 0;
    transform: translateY(50px);
}

.service-card.animate-in {
    opacity: 1;
    transform: translateY(0);
    animation: fadeInScale 0.8s ease forwards;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg, var(--electric-blue) 0%, var(--electric-blue-light) 100%);
    transform: scaleX(0);
    transform-origin: left;
    transition: var(--transition-smooth);
}

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

.service-card:hover {
    transform: translateY(-15px) rotateX(5deg) rotateY(2deg);
    background: var(--glass-strong);
    border-color: var(--electric-blue);
    box-shadow: 0 30px 60px rgba(0,0,0,0.3), 0 0 30px var(--shadow-glow);
}

.service-icon {
    width: 70px;
    height: 70px;
    background: linear-gradient(135deg, var(--electric-blue) 0%, var(--electric-blue-light) 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 2rem;
    color: var(--navy-primary);
    font-size: 1.8rem;
    transition: var(--transition-spring);
}

.service-card:hover .service-icon {
    transform: scale(1.1) rotate(360deg);
    animation: glow 2s ease-in-out infinite;
}

.service-card h3 {
    font-size: 1.6rem;
    margin-bottom: 1rem;
    color: var(--pure-white);
    font-weight: 600;
}

.service-card p {
    color: var(--light-gray);
    line-height: 1.8;
    font-size: 1rem;
}

/* ===== SECTION CTA ÉLÉGANTE ===== */
.cta-section {
    background: linear-gradient(135deg, var(--navy-secondary) 0%, var(--navy-primary) 100%);
    position: relative;
    overflow: hidden;
}

.cta-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 50% 50%, var(--electric-blue) 0%, transparent 70%);
    opacity: 0.05;
}

/* ===== FOOTER MINIMALISTE ===== */
footer {
    background: var(--navy-primary);
    padding: 3rem 2rem 2rem;
    border-top: 1px solid var(--glass-border);
    text-align: center;
}

.footer-content {
    max-width: 1400px;
    margin: 0 auto;
}

.footer-logo {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, var(--pure-white) 0%, var(--electric-blue-light) 100%);
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* ===== MENU MOBILE PREMIUM ===== */
.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 4px;
    cursor: pointer;
    z-index: 1000;
    position: relative;
}

.mobile-menu-btn span {
    width: 25px;
    height: 2px;
    background: var(--pure-white);
    transition: var(--transition-smooth);
    border-radius: 2px;
}

.mobile-nav {
    position: fixed;
    top: 0;
    right: -100%;
    width: 100%;
    height: 100vh;
    background: var(--navy-primary);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2rem;
    transition: var(--transition-smooth);
    z-index: 999;
}

.mobile-nav.active {
    right: 0;
}

.mobile-nav a {
    font-size: 2rem;
    font-weight: 500;
    color: var(--pure-white);
    text-decoration: none;
    opacity: 0;
    transform: translateY(20px);
    transition: var(--transition-smooth);
}

.mobile-nav.active a {
    opacity: 1;
    transform: translateY(0);
}

/* ===== PARTICULES ÉLÉGANTES ===== */
#particles-js {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 1;
}

.particles {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 1;
}

.particle {
    position: absolute;
    width: 2px;
    height: 2px;
    background: var(--electric-blue);
    border-radius: 50%;
    opacity: 0.4;
    animation: float 8s ease-in-out infinite;
}

.particle:nth-child(1) { top: 20%; left: 20%; animation-delay: 0s; }
.particle:nth-child(2) { top: 80%; left: 80%; animation-delay: 2s; }
.particle:nth-child(3) { top: 40%; left: 70%; animation-delay: 4s; }
.particle:nth-child(4) { top: 70%; left: 30%; animation-delay: 1s; }
.particle:nth-child(5) { top: 10%; left: 50%; animation-delay: 3s; }

/* ===== SCROLL INDICATOR ===== */
.scroll-indicator {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    color: var(--medium-gray);
    font-size: 0.9rem;
    animation: bounce 2s infinite;
    z-index: 10;
}

/* ===== RESPONSIVE DESIGN ===== */
@media (max-width: 768px) {
    .mobile-menu-btn {
        display: flex;
    }
    
    .desktop-nav {
        display: none;
    }
    
    .services-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .hero {
        padding: 8rem 1rem 4rem;
    }
    
    .section {
        padding: 4rem 1rem;
    }
}

/* ===== ANIMATION DELAYS POUR LES CARTES ===== */
.service-card:nth-child(1) { animation-delay: 0.1s; }
.service-card:nth-child(2) { animation-delay: 0.2s; }
.service-card:nth-child(3) { animation-delay: 0.3s; }
.service-card:nth-child(4) { animation-delay: 0.4s; }
.service-card:nth-child(5) { animation-delay: 0.5s; }
.service-card:nth-child(6) { animation-delay: 0.6s; }

/* ===== SCROLLBAR PERSONNALISÉE ===== */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--navy-primary); }
::-webkit-scrollbar-thumb { 
    background: var(--electric-blue); 
    border-radius: 3px; 
}
::-webkit-scrollbar-thumb:hover { 
    background: var(--electric-blue-light); 
}