/* 
=========================================================
   Design System & Reset
=========================================================
*/

:root {
    /* Colors */
    --color-primary: #1B3A5C;
    /* Bleu foncé */
    --color-secondary: #2E75B6;
    /* Bleu moyen */
    --color-accent: #4A7C59;
    /* Vert action */
    --color-bg-light: #F8F9FA;
    /* Gris très clair */
    --color-bg-dark: #0A1423;
    /* Variante très sombre pour le footer/contact */
    --color-text-main: #2D3748;
    --color-text-muted: #718096;
    --color-white: #FFFFFF;

    /* Modern Gradients */
    --gradient-primary: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    --gradient-accent: linear-gradient(135deg, var(--color-secondary), var(--color-accent));
    --gradient-dark: linear-gradient(135deg, #1B3A5C, #0A1423);

    /* Typography */
    --font-main: 'Inter', sans-serif;

    /* Spacing */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 2rem;
    --space-lg: 4rem;
    --space-xl: 6rem;

    /* Shadows & Radii (More Modern) */
    --shadow-sm: 0 4px 6px rgba(27, 58, 92, 0.04), 0 1px 3px rgba(27, 58, 92, 0.08);
    --shadow-md: 0 10px 20px rgba(27, 58, 92, 0.06), 0 2px 6px rgba(27, 58, 92, 0.08);
    --shadow-lg: 0 20px 40px rgba(27, 58, 92, 0.08), 0 6px 15px rgba(27, 58, 92, 0.08);
    --shadow-glow: 0 0 20px rgba(46, 117, 182, 0.3);

    --radius-sm: 12px;
    --radius-md: 20px;
    --radius-lg: 32px;

    /* Transitions */
    --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.7s cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

/* Subtle tech data-grid background */
body {
    font-family: var(--font-main);
    color: var(--color-text-main);
    line-height: 1.6;
    background-color: var(--color-bg-light);

    /* Data nodes mesh pattern */
    background-image:
        radial-gradient(rgba(27, 58, 92, 0.06) 1.5px, transparent 1.5px),
        radial-gradient(rgba(27, 58, 92, 0.06) 1.5px, transparent 1.5px);
    background-size: 40px 40px;
    background-position: 0 0, 20px 20px;
    overflow-x: hidden;
}

/* Typography Base */
h1,
h2,
h3,
h4 {
    color: var(--color-primary);
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.02em;
}

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

ul {
    list-style: none;
}

/* Layout Utilities */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-md);
}

section {
    padding: var(--space-xl) 0;
    position: relative;
    z-index: 2;
}

.bg-light {
    background-color: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(10px);
}

.bg-dark {
    background: var(--gradient-dark);
    color: var(--color-white);
}

.bg-dark h2,
.bg-dark h3 {
    color: var(--color-white);
}

.section-header {
    text-align: center;
    max-width: 800px;
    margin: 0 auto var(--space-lg);
}

.section-header h2 {
    font-size: 2.75rem;
    margin-bottom: var(--space-sm);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    display: inline-block;
}

.section-header p {
    font-size: 1.125rem;
    color: var(--color-text-muted);
}

/* Animations Utilities */
.fade-in-section {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity var(--transition-slow), transform var(--transition-slow);
    will-change: opacity, transform;
}

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

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 1rem 1.75rem;
    border-radius: 50px;
    /* Pill shape is very modern */
    font-weight: 600;
    font-size: 1rem;
    transition: all var(--transition-fast);
    cursor: pointer;
    border: none;
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: var(--gradient-accent);
    color: var(--color-white);
    box-shadow: 0 4px 15px rgba(74, 124, 89, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(74, 124, 89, 0.4);
}

/* Shine effect on primary button */
.btn-primary::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 50%;
    height: 100%;
    background: linear-gradient(to right, rgba(255, 255, 255, 0) 0%, rgba(255, 255, 255, 0.3) 50%, rgba(255, 255, 255, 0) 100%);
    transform: skewX(-25deg);
    animation: shine 4s infinite;
}

@keyframes shine {
    0% {
        left: -100%;
    }

    20% {
        left: 200%;
    }

    100% {
        left: 200%;
    }
}

.btn-secondary {
    background-color: var(--color-white);
    color: var(--color-primary);
    border: 1px solid rgba(27, 58, 92, 0.1);
    box-shadow: var(--shadow-sm);
}

.btn-secondary:hover {
    background-color: rgba(27, 58, 92, 0.02);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    border-color: rgba(27, 58, 92, 0.2);
}

.btn-outline {
    background-color: transparent;
    border: 1.5px solid var(--color-primary);
    color: var(--color-primary);
}

.btn-outline:hover {
    background-color: var(--color-primary);
    color: var(--color-white);
}

/* 
=========================================================
   Navigation
=========================================================
*/
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    z-index: 1000;
    box-shadow: 0 1px 0 rgba(0, 0, 0, 0.05);
    padding: 1.25rem 0;
    transition: all var(--transition-normal);
}

.navbar.scrolled {
    padding: 0.75rem 0;
    background-color: rgba(255, 255, 255, 0.95);
    box-shadow: var(--shadow-sm);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.75rem;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: -1px;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 2.5rem;
}

.nav-links a {
    font-weight: 500;
    color: var(--color-text-main);
    position: relative;
}

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

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

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

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

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    color: var(--color-primary);
}

/* Mobile Nav */
.mobile-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    background-color: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-md);
    padding: var(--space-md);
}

.mobile-nav.is-open {
    display: block;
    animation: slideDown 0.3s ease forwards;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.mobile-nav-links {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    text-align: center;
}

/* 
=========================================================
   Hero Section
=========================================================
*/
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 6rem;
    position: relative;
    overflow: hidden;
    background: radial-gradient(circle at 15% 50%, rgba(46, 117, 182, 0.08), transparent 35%),
        radial-gradient(circle at 85% 30%, rgba(74, 124, 89, 0.05), transparent 35%);
}

.hero-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-lg);
    align-items: center;
    position: relative;
    z-index: 2;
}

.hero-subtitle {
    font-size: 1rem;
    color: var(--color-secondary);
    text-transform: uppercase;
    letter-spacing: 3px;
    margin-bottom: var(--space-sm);
    font-weight: 700;
    display: inline-block;
    padding: 0.5rem 1rem;
    background: rgba(46, 117, 182, 0.1);
    border-radius: 50px;
    border: 1px solid rgba(46, 117, 182, 0.2);
}

.hero-title {
    font-size: 4.5rem;
    margin-bottom: var(--space-sm);
    letter-spacing: -2px;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    line-height: 1.1;
}

.hero-baseline {
    font-size: 1.5rem;
    color: var(--color-text-muted);
    margin-bottom: var(--space-lg);
    max-width: 500px;
    font-weight: 400;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
}

/* Abstract AI/Data Graphics */
.hero-graphics {
    position: relative;
    width: 100%;
    height: 500px;
    display: flex;
    justify-content: center;
    align-items: center;
}

/* Glowing Core */
.hero-graphics::before {
    content: '';
    position: absolute;
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, rgba(46, 117, 182, 0.4) 0%, rgba(255, 255, 255, 0) 70%);
    z-index: 0;
    animation: pulse 6s infinite alternate;
}

@keyframes pulse {
    0% {
        transform: scale(1);
        opacity: 0.6;
    }

    100% {
        transform: scale(1.2);
        opacity: 1;
    }
}

/* AI/Data Network Canvas */
#network-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

/* 
=========================================================
   Services Section (Glassmorphic Cards)
=========================================================
*/
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--space-md);
}

.service-card {
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    padding: 2.5rem 2rem;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    border: 1px solid rgba(255, 255, 255, 1);
    transition: all var(--transition-normal);
    height: 100%;
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-primary);
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.service-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    background: rgba(255, 255, 255, 0.95);
}

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

.service-icon {
    width: 60px;
    height: 60px;
    background: var(--gradient-primary);
    color: var(--color-white);
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    margin-bottom: 1.5rem;
    box-shadow: 0 10px 20px rgba(46, 117, 182, 0.2);
    transition: transform var(--transition-normal);
}

.service-card:hover .service-icon {
    transform: scale(1.1) rotate(-5deg);
}

.service-card h3 {
    font-size: 1.35rem;
    margin-bottom: 1rem;
}

.service-card p {
    color: var(--color-text-muted);
    font-size: 1rem;
    line-height: 1.7;
}

/* 
=========================================================
   Parcours Section (Timeline)
=========================================================
*/
.parcours {
    border-top: 1px solid rgba(0, 0, 0, 0.03);
    border-bottom: 1px solid rgba(0, 0, 0, 0.03);
}

.timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
    padding-left: 2rem;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(to bottom, var(--color-primary), var(--color-secondary), transparent);
}

.timeline-item {
    position: relative;
    margin-bottom: 3rem;
}

.timeline-item:last-child {
    margin-bottom: 0;
}

.timeline-dot {
    position: absolute;
    left: -2rem;
    top: 8px;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--gradient-accent);
    transform: translateX(-50%);
    border: 4px solid var(--color-white);
    box-shadow: 0 0 0 2px rgba(74, 124, 89, 0.2);
    z-index: 2;
}

.timeline-content {
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(10px);
    padding: 2rem;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    border: 1px solid rgba(255, 255, 255, 0.8);
    transition: all var(--transition-fast);
}

.timeline-content:hover {
    box-shadow: var(--shadow-md);
    transform: translateX(5px);
}

.timeline-date {
    display: inline-block;
    font-size: 0.875rem;
    font-weight: 700;
    color: var(--color-accent);
    margin-bottom: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 1.5px;
}

.timeline-content h3 {
    font-size: 1.35rem;
    margin-bottom: 0.75rem;
}

/* 
=========================================================
   Différenciation Section
=========================================================
*/
.pillars-container {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-md);
    margin-bottom: var(--space-lg);
}

.pillar-card {
    text-align: center;
    padding: var(--space-md);
}

.pillar-icon {
    width: 90px;
    height: 90px;
    margin: 0 auto 1.5rem;
    background: var(--gradient-primary);
    color: var(--color-white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 15px 30px rgba(27, 58, 92, 0.15);
    position: relative;
}

/* Halo effect */
.pillar-icon::after {
    content: '';
    position: absolute;
    width: 100%;
    height: 100%;
    border-radius: 50%;
    box-shadow: 0 0 0 15px rgba(27, 58, 92, 0.05);
    z-index: -1;
    transition: transform var(--transition-normal);
}

.pillar-card:hover .pillar-icon::after {
    transform: scale(1.15);
}

.pillar-icon i {
    width: 40px;
    height: 40px;
}

.pillar-card h3 {
    font-size: 1.4rem;
    margin-bottom: 1rem;
}

.sectors-badge-container {
    display: flex;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
    margin-top: var(--space-md);
    padding-top: var(--space-lg);
    border-top: 1px solid rgba(0, 0, 0, 0.05);
}

.sector-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border-radius: 50px;
    background: rgba(255, 255, 255, 0.9);
    color: var(--color-primary);
    font-weight: 600;
    border: 1px solid rgba(0, 0, 0, 0.08);
    box-shadow: var(--shadow-sm);
    transition: transform var(--transition-fast);
}

.sector-badge:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
    color: var(--color-secondary);
}

/* 
=========================================================
   Contact Section & Footer
=========================================================
*/
.contact {
    position: relative;
    overflow: hidden;
}

/* Data grid for dark section */
.contact::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image:
        radial-gradient(rgba(255, 255, 255, 0.05) 1px, transparent 1px);
    background-size: 30px 30px;
    opacity: 0.5;
}

.contact-container {
    max-width: 800px;
    text-align: center;
    position: relative;
    z-index: 2;
}

.contact-content h2 {
    font-size: 3rem;
    margin-bottom: var(--space-sm);
    background: linear-gradient(135deg, #fff, rgba(255, 255, 255, 0.7));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.contact-content p {
    font-size: 1.25rem;
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: var(--space-lg);
}

.contact-methods {
    display: flex;
    justify-content: center;
    gap: var(--space-md);
    flex-wrap: wrap;
}

.contact-method-card {
    background: rgba(255, 255, 255, 0.03);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    padding: 2rem;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    gap: 1.25rem;
    transition: all var(--transition-normal);
    min-width: 320px;
    text-align: left;
}

.contact-method-card:hover {
    background: rgba(255, 255, 255, 0.08);
    transform: translateY(-5px);
    border-color: rgba(255, 255, 255, 0.3);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.2);
}

.contact-method-card .contact-icon {
    width: 60px;
    height: 60px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-white);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.contact-text {
    display: flex;
    flex-direction: column;
}

.contact-text span {
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.6);
    margin-bottom: 0.25rem;
}

.contact-text strong {
    font-size: 1.25rem;
    color: var(--color-white);
    font-weight: 600;
}

footer {
    background-color: #050a12;
    /* Deepest dark */
    color: rgba(255, 255, 255, 0.5);
    padding: 2.5rem 0;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.footer-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-logo {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--color-white);
    letter-spacing: -1px;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.5);
    background: rgba(255, 255, 255, 0.05);
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: all var(--transition-fast);
}

.footer-links a:hover {
    color: var(--color-white);
    background: var(--color-secondary);
    transform: translateY(-3px);
}

/* 
=========================================================
   Media Queries (Responsive)
=========================================================
*/
@media (max-width: 1024px) {
    .hero-title {
        font-size: 3.5rem;
    }
}

@media (max-width: 900px) {
    .pillars-container {
        grid-template-columns: 1fr;
    }

    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 3rem;
    }

    .hero-subtitle {
        margin: 0 auto 1.5rem;
        display: inline-block;
    }

    .hero-baseline {
        margin: 0 auto var(--space-lg);
    }

    .hero-buttons {
        justify-content: center;
    }

    .hero-graphics {
        height: 400px;
        order: -1;
    }

    .shape-1 {
        width: 200px;
        height: 250px;
        margin-top: -125px;
        margin-left: -100px;
    }

    .shape-2 {
        width: 140px;
        height: 140px;
    }

    .shape-3 {
        width: 120px;
        height: 120px;
    }
}

@media (max-width: 768px) {

    .nav-links,
    .nav-cta {
        display: none;
    }

    .mobile-menu-btn {
        display: block;
    }

    .contact-methods {
        flex-direction: column;
        align-items: center;
    }

    .contact-method-card {
        width: 100%;
    }

    .footer-container {
        flex-direction: column;
        gap: 1.5rem;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2.75rem;
    }

    .hero-buttons {
        flex-direction: column;
        width: 100%;
        gap: 1rem;
    }

    .btn {
        width: 100%;
    }

    .section-header h2 {
        font-size: 2.25rem;
    }
}