/* ============================================
   Opsinnov - Style Sheet
   Modern ESN Website (effets dynamiques + largeur alignée)
   ============================================ */

:root {
    --color-bg: #0a0a0f;
    --color-bg-secondary: #12121a;
    --color-surface: #1a1a2e;
    --color-surface-hover: #22223a;
    --color-primary: #6c63ff;
    --color-primary-light: #8b83ff;
    --color-secondary: #00d4aa;
    --color-accent: #ff6b6b;
    --color-text: #e8e8f0;
    --color-text-secondary: #9898b0;
    --color-border: #2a2a40;
    --color-border-light: #3a3a55;
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-heading: 'Space Grotesk', 'Inter', sans-serif;
    --section-padding: 120px;
    --container-max: 1100px;
    --gap-sm: 8px;
    --gap-md: 16px;
    --gap-lg: 24px;
    --gap-xl: 48px;
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --shadow-glow: 0 0 40px rgba(108, 99, 255, 0.15);
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
}

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; font-size: 16px; }
body { font-family: var(--font-primary); background: var(--color-bg); color: var(--color-text); line-height: 1.7; overflow-x: hidden; }
a { color: inherit; text-decoration: none; transition: color var(--transition-fast); }
img { max-width: 100%; display: block; }
ul { list-style: none; }

/* --- Largeur alignée globalement --- */
.container { max-width: var(--container-max); margin: 0 auto; padding: 0 var(--gap-lg); }

/* Toutes les sections partagent la même largeur de contenu */
.section, .hero, .footer { padding-left: var(--gap-lg); padding-right: var(--gap-lg); }

h1, h2, h3, h4 { font-family: var(--font-heading); font-weight: 700; line-height: 1.2; color: #fff; }
h1 { font-size: clamp(2.5rem, 6vw, 4.5rem); }
h2 { font-size: clamp(2rem, 4vw, 3rem); }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.125rem; }
p { color: var(--color-text-secondary); }

.text-gradient {
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}

/* --- Buttons --- */
.btn { display: inline-flex; align-items: center; justify-content: center; padding: 14px 32px; border-radius: var(--radius-sm); font-weight: 600; font-size: 1rem; cursor: pointer; transition: all var(--transition-normal); border: 2px solid transparent; gap: var(--gap-sm); }
.btn-primary { background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light)); color: #fff; border-color: var(--color-primary); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(108,99,255,0.4); }
.btn-secondary { background: var(--color-surface); color: #fff; border-color: var(--color-border-light); }
.btn-secondary:hover { background: var(--color-surface-hover); border-color: var(--color-primary); transform: translateY(-2px); }
.btn-outline { background: transparent; color: #fff; border-color: var(--color-border-light); }
.btn-outline:hover { border-color: var(--color-primary); background: rgba(108,99,255,0.1); }
.btn-full { width: 100%; }

/* --- Navigation --- */
.navbar { position: fixed; top: 0; left: 0; right: 0; z-index: 1000; padding: var(--gap-md) 0; transition: all var(--transition-normal); background: transparent; }
.navbar.scrolled { background: rgba(10,10,15,0.9); backdrop-filter: blur(20px); border-bottom: 1px solid var(--color-border); padding: var(--gap-sm) 0; }
.nav-container { display: flex; align-items: center; justify-content: space-between; max-width: var(--container-max); margin: 0 auto; padding: 0 var(--gap-lg); width: 100%; }
.nav-brand { font-family: var(--font-heading); font-size: 1.5rem; font-weight: 700; color: #fff; display: flex; align-items: center; gap: var(--gap-sm); }
.brand-icon { color: var(--color-primary); font-size: 1.75rem; }
.nav-links { display: flex; align-items: center; gap: var(--gap-lg); }
.nav-links a { color: var(--color-text-secondary); font-weight: 500; font-size: 0.95rem; position: relative; }
.nav-links a:hover { color: #fff; }
.nav-links a.active { color: var(--color-primary-light); }
.nav-links a.active::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
    border-radius: 1px;
    animation: slideIn 0.3s ease;
}
@keyframes slideIn { from { transform: scaleX(0); } to { transform: scaleX(1); } }
.btn-nav { background: var(--color-primary); color: #fff !important; padding: 8px 20px; border-radius: var(--radius-sm); }
.btn-nav:hover { background: var(--color-primary-light); }
.nav-toggle { display: none; flex-direction: column; gap: 5px; background: none; border: none; cursor: pointer; padding: 5px; }
.nav-toggle span { width: 25px; height: 2px; background: #fff; transition: all var(--transition-normal); }

/* --- Hero --- */
.hero { position: relative; min-height: 100vh; display: flex; align-items: center; justify-content: center; overflow: hidden; }
.hero-bg { position: absolute; inset: 0; overflow: hidden; }
.gradient-orb { position: absolute; border-radius: 50%; filter: blur(80px); opacity: 0.4; animation: float 20s ease-in-out infinite; }
.orb-1 { width: 600px; height: 600px; background: var(--color-primary); top: -200px; right: -100px; }
.orb-2 { width: 400px; height: 400px; background: var(--color-secondary); bottom: -100px; left: -100px; animation-delay: -7s; }
.orb-3 { width: 300px; height: 300px; background: var(--color-accent); top: 50%; left: 50%; animation-delay: -14s; }
@keyframes float { 0%,100% { transform: translate(0,0) scale(1); } 25% { transform: translate(50px,-50px) scale(1.1); } 50% { transform: translate(-30px,30px) scale(0.9); } 75% { transform: translate(40px,40px) scale(1.05); } }
.hero-content { position: relative; z-index: 1; text-align: center; max-width: 900px; }
.hero-badge { display: inline-block; padding: 8px 20px; background: var(--color-surface); border: 1px solid var(--color-border); border-radius: 50px; font-size: 0.875rem; color: var(--color-text-secondary); margin-bottom: var(--gap-lg); }
.hero h1 { margin-bottom: var(--gap-lg); }
.hero-subtitle { font-size: clamp(1rem, 2vw, 1.25rem); max-width: 700px; margin: 0 auto var(--gap-xl); color: var(--color-text-secondary); }
.hero-cta { display: flex; gap: var(--gap-md); justify-content: center; flex-wrap: wrap; }
.scroll-indicator { position: absolute; bottom: 40px; left: 50%; transform: translateX(-50%); }
.scroll-indicator span { display: block; width: 2px; height: 40px; background: linear-gradient(to bottom, var(--color-primary), transparent); animation: scrollDown 2s ease-in-out infinite; }
@keyframes scrollDown { 0% { transform: scaleY(0); transform-origin: top; } 50% { transform: scaleY(1); transform-origin: top; } 51% { transform: scaleY(1); transform-origin: bottom; } 100% { transform: scaleY(0); transform-origin: bottom; } }

/* --- Section Base --- */
.section { padding: var(--section-padding) 0; }
.section-header { text-align: center; margin-bottom: var(--gap-xl); }
.section-tag { display: inline-block; padding: 6px 16px; background: rgba(108,99,255,0.1); border: 1px solid rgba(108,99,255,0.3); border-radius: 50px; font-size: 0.875rem; color: var(--color-primary-light); margin-bottom: var(--gap-md); }
.section-header h2 { margin-bottom: var(--gap-md); }
.section-subtitle { font-size: 1.125rem; max-width: 600px; margin: 0 auto; }

/* --- About --- */
.about { background: var(--color-bg-secondary); }
.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: var(--gap-xl); align-items: center; }
.about-text .lead { font-size: 1.5rem; font-weight: 600; color: #fff; margin-bottom: var(--gap-md); line-height: 1.4; }
.about-text p { margin-bottom: var(--gap-md); font-size: 1.05rem; }
.about-stats { display: grid; grid-template-columns: 1fr 1fr; gap: var(--gap-md); }
.stat-card { background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-md); padding: var(--gap-lg); text-align: center; transition: all var(--transition-normal); }
.stat-card:hover { transform: translateY(-4px); border-color: var(--color-primary); box-shadow: var(--shadow-glow); }
.stat-number { display: block; font-size: 2.5rem; font-weight: 800; font-family: var(--font-heading); background: linear-gradient(135deg, var(--color-primary), var(--color-secondary)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; margin-bottom: var(--gap-sm); }
.stat-label { font-size: 0.9rem; color: var(--color-text-secondary); }

/* --- Services --- */
.services-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--gap-lg); }
.service-card { background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-lg); padding: var(--gap-xl); transition: all var(--transition-normal); position: relative; overflow: hidden; }
.service-card::before { content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px; background: linear-gradient(90deg, var(--color-primary), var(--color-secondary)); transform: scaleX(0); transition: transform var(--transition-normal); }
.service-card:hover::before { transform: scaleX(1); }
.service-card:hover { transform: translateY(-8px); border-color: var(--color-primary); box-shadow: var(--shadow-glow); }
.service-icon { font-size: 3rem; margin-bottom: var(--gap-md); }
.service-card h3 { margin-bottom: var(--gap-md); }
.service-card > p { margin-bottom: var(--gap-lg); }
.service-features { display: flex; flex-direction: column; gap: var(--gap-sm); }
.service-features li { padding: 6px 0; color: var(--color-text-secondary); font-size: 0.95rem; position: relative; padding-left: 20px; }
.service-features li::before { content: '\2192'; position: absolute; left: 0; color: var(--color-primary); }

/* --- IA Souveraine Article --- */
.ia-souveraine { background: var(--color-bg); }
.article-card { max-width: 100%; background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-lg); overflow: hidden; }
.article-hero { padding: var(--gap-xl); background: linear-gradient(135deg, rgba(108,99,255,0.1), rgba(0,212,170,0.05)); border-bottom: 1px solid var(--color-border); }
.article-badge { display: inline-block; padding: 4px 12px; background: rgba(108,99,255,0.2); border-radius: 50px; font-size: 0.8rem; color: var(--color-primary-light); margin-bottom: var(--gap-md); }
.article-hero h2 { margin-bottom: var(--gap-md); }
.article-lead { font-size: 1.15rem; color: var(--color-text); font-weight: 500; }
.article-body { padding: var(--gap-xl); }
.article-body h3 { font-size: 1.35rem; margin-top: var(--gap-xl); margin-bottom: var(--gap-md); color: #fff; }
.article-body h3:first-child { margin-top: 0; }
.article-body p { margin-bottom: var(--gap-md); font-size: 1.05rem; }
.article-body > ul { margin-bottom: var(--gap-lg); padding-left: 0; }
.article-body > ul li { padding: 8px 0 8px 24px; position: relative; color: var(--color-text-secondary); font-size: 1.05rem; }
.article-body > ul li::before { content: '\2666'; position: absolute; left: 0; color: var(--color-primary); font-size: 0.7rem; top: 12px; }

.resource-links { display: flex; flex-direction: column; gap: var(--gap-md); margin: var(--gap-lg) 0; }
.resource-link { display: flex; align-items: center; gap: var(--gap-md); padding: var(--gap-md) var(--gap-lg); background: var(--color-bg-secondary); border: 1px solid var(--color-border); border-radius: var(--radius-md); transition: all var(--transition-normal); }
.resource-link:hover { border-color: var(--color-primary); background: var(--color-surface-hover); transform: translateX(8px); }
.resource-icon { font-size: 1.75rem; flex-shrink: 0; }
.resource-link strong { display: block; color: #fff; font-size: 1rem; margin-bottom: 2px; }
.resource-link p { font-size: 0.9rem; color: var(--color-text-secondary); margin: 0; }
.link-arrow { margin-left: auto; font-size: 1.25rem; color: var(--color-primary); flex-shrink: 0; transition: transform var(--transition-fast); }
.resource-link:hover .link-arrow { transform: translateX(4px); }

.tech-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--gap-md); margin: var(--gap-lg) 0; }
.tech-item { background: var(--color-bg-secondary); border: 1px solid var(--color-border); border-radius: var(--radius-md); padding: var(--gap-md) var(--gap-lg); transition: all var(--transition-normal); }
.tech-item:hover { border-color: var(--color-secondary); transform: translateY(-2px); }
.tech-item strong { display: block; color: var(--color-secondary); margin-bottom: 4px; }
.tech-item p { font-size: 0.9rem; margin: 0; }

.benefits-list { display: flex; flex-direction: column; gap: var(--gap-md); margin: var(--gap-lg) 0; }
.benefit { display: flex; gap: var(--gap-md); padding: var(--gap-md); background: var(--color-bg-secondary); border-radius: var(--radius-md); border-left: 3px solid var(--color-primary); }
.benefit-icon { font-size: 1.5rem; flex-shrink: 0; }
.benefit strong { display: block; color: #fff; margin-bottom: 4px; }
.benefit p { font-size: 0.95rem; margin: 0; }

.article-cta { margin-top: var(--gap-xl); padding: var(--gap-xl); background: linear-gradient(135deg, rgba(108,99,255,0.1), rgba(0,212,170,0.05)); border: 1px solid var(--color-border); border-radius: var(--radius-md); text-align: center; }
.article-cta p { margin-bottom: var(--gap-lg); font-size: 1.1rem; color: var(--color-text); }

/* --- Competences --- */
.competences-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--gap-lg); }
.comp-card { background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-md); padding: var(--gap-xl); text-align: center; transition: all var(--transition-normal); }
.comp-card:hover { transform: translateY(-4px); border-color: var(--color-secondary); box-shadow: 0 0 30px rgba(0,212,170,0.1); }
.comp-icon { font-size: 2.5rem; margin-bottom: var(--gap-md); }
.comp-card h3 { margin-bottom: var(--gap-sm); }
.comp-card p { font-size: 0.95rem; }

/* --- Contact --- */
.contact { background: var(--color-bg-secondary); }
.contact-form-full { background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-lg); padding: var(--gap-xl); max-width: 800px; margin: 0 auto; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: var(--gap-md); }
.form-group { margin-bottom: var(--gap-md); }
.form-group label { display: block; margin-bottom: var(--gap-sm); color: #fff; font-weight: 500; font-size: 0.95rem; }
.form-group input, .form-group textarea, .form-group select { width: 100%; padding: 12px 16px; background: var(--color-bg-secondary); border: 1px solid var(--color-border); border-radius: var(--radius-sm); color: var(--color-text); font-family: var(--font-primary); font-size: 1rem; transition: all var(--transition-fast); }
.form-group input:focus, .form-group textarea:focus, .form-group select:focus { outline: none; border-color: var(--color-primary); box-shadow: 0 0 0 3px rgba(108,99,255,0.15); }
.form-group textarea { min-height: 140px; resize: vertical; }

/* --- Captcha --- */
.captcha-container { margin: var(--gap-lg) 0; }
.captcha-box { display: flex; align-items: center; gap: var(--gap-md); padding: var(--gap-md) var(--gap-lg); background: var(--color-bg-secondary); border: 1px solid var(--color-border); border-radius: var(--radius-md); transition: all var(--transition-normal); }
.captcha-box:hover { border-color: var(--color-primary); }
.captcha-icon { font-size: 1.5rem; flex-shrink: 0; }
.captcha-content { display: flex; align-items: center; gap: var(--gap-md); flex: 1; }
.captcha-label { font-size: 0.9rem; color: var(--color-text-secondary); white-space: nowrap; }
.captcha-question { display: flex; align-items: center; gap: var(--gap-sm); }
.captcha-question span { font-size: 1.1rem; font-weight: 600; color: #fff; font-family: var(--font-heading); }
.captcha-input { width: 60px !important; text-align: center; font-size: 1.1rem !important; font-weight: 600; padding: 8px 12px !important; }
.captcha-refresh { background: none; border: 1px solid var(--color-border); color: var(--color-text-secondary); width: 36px; height: 36px; border-radius: var(--radius-sm); cursor: pointer; font-size: 1.2rem; display: flex; align-items: center; justify-content: center; transition: all var(--transition-fast); flex-shrink: 0; }
.captcha-refresh:hover { border-color: var(--color-primary); color: var(--color-primary); transform: rotate(180deg); }

/* --- Footer --- */
.footer { background: var(--color-bg); border-top: 1px solid var(--color-border); padding: var(--gap-xl) 0; }
.footer-content { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: var(--gap-md); }
.footer-brand { font-family: var(--font-heading); font-size: 1.25rem; font-weight: 700; color: #fff; display: flex; align-items: center; gap: var(--gap-sm); }
.footer-links { display: flex; gap: var(--gap-lg); }
.footer-links a { color: var(--color-text-secondary); font-size: 0.9rem; }
.footer-links a:hover { color: #fff; }
.footer-bottom { width: 100%; text-align: center; margin-top: var(--gap-lg); padding-top: var(--gap-lg); border-top: 1px solid var(--color-border); font-size: 0.85rem; color: var(--color-text-secondary); }

/* ============================================
   EFFETS DYNAMIQUES
   ============================================ */

/* --- Wheat Particles --- */
.wheat-particle {
    position: absolute;
    width: 4px;
    height: 4px;
    background: radial-gradient(circle, rgba(255, 215, 0, 0.8), transparent);
    border-radius: 50%;
    pointer-events: none;
    animation: wheatFloat linear infinite;
}

@keyframes wheatFloat {
    0% { transform: translateY(100vh) rotate(0deg); opacity: 0; }
    10% { opacity: 0.6; }
    90% { opacity: 0.6; }
    100% { transform: translateY(-100px) rotate(360deg); opacity: 0; }
}

/* --- Fade-in animation --- */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

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

/* --- Staggered card animations via JS-added classes --- */
/* Les cartes sont visibles par défaut et le JS ajoute .card-hidden → .card-visible pour l'animation */
.card-hidden {
    opacity: 0 !important;
    transform: translateY(20px) !important;
}

.card-visible {
    opacity: 1 !important;
    transform: translateY(0) !important;
    transition: opacity 0.6s ease, transform 0.6s ease !important;
}

.card-visible:nth-child(1) { transition-delay: 0.05s !important; }
.card-visible:nth-child(2) { transition-delay: 0.1s !important; }
.card-visible:nth-child(3) { transition-delay: 0.15s !important; }
.card-visible:nth-child(4) { transition-delay: 0.2s !important; }
.card-visible:nth-child(5) { transition-delay: 0.25s !important; }
.card-visible:nth-child(6) { transition-delay: 0.3s !important; }

/* --- Typing cursor effect for hero --- */
.hero h1 {
    position: relative;
    display: inline-block;
}

.hero h1::after {
    content: '|';
    position: absolute;
    right: -0.6em;
    color: var(--color-primary);
    animation: blink 1s step-end infinite;
    font-weight: 300;
}

@keyframes blink {
    0%, 50% { opacity: 1; }
    51%, 100% { opacity: 0; }
}

/* --- Shimmer effect on cards --- */
.service-card::after,
.comp-card::after {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: linear-gradient(
        45deg,
        transparent 40%,
        rgba(108, 99, 255, 0.03) 50%,
        transparent 60%
    );
    transition: transform 0.6s ease;
    pointer-events: none;
}

.service-card:hover::after,
.comp-card:hover::after {
    transform: translate(20%, 20%);
}

/* --- Pulse animation for brand icon --- */
.brand-icon {
    animation: pulse 3s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.1); }
}

/* --- Glow ring animation on stat cards --- */
.stat-card::before {
    content: '';
    position: absolute;
    inset: -1px;
    border-radius: var(--radius-md);
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    opacity: 0;
    z-index: -1;
    transition: opacity var(--transition-normal);
}

.stat-card:hover::before {
    opacity: 0.3;
    animation: glowPulse 2s ease-in-out infinite;
}

@keyframes glowPulse {
    0%, 100% { opacity: 0.2; }
    50% { opacity: 0.4; }
}

.stat-card {
    position: relative;
    overflow: hidden;
}

/* --- Responsive --- */
@media (max-width: 992px) {
    .services-grid { grid-template-columns: 1fr 1fr; }
    .competences-grid { grid-template-columns: 1fr 1fr; }
    .about-grid { grid-template-columns: 1fr; }
    .tech-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
    :root { --section-padding: 80px; }
    .nav-links { display: none; position: fixed; top: 0; left: 0; right: 0; bottom: 0; background: rgba(10,10,15,0.97); flex-direction: column; justify-content: center; align-items: center; gap: var(--gap-xl); z-index: 999; }
    .nav-links.active { display: flex; }
    .nav-links a { font-size: 1.25rem; }
    .nav-toggle { display: flex; z-index: 1001; }
    .nav-toggle.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
    .nav-toggle.active span:nth-child(2) { opacity: 0; }
    .nav-toggle.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }
    .form-row { grid-template-columns: 1fr; }
    .hero-cta { flex-direction: column; align-items: center; }
    .footer-content { flex-direction: column; text-align: center; }
    .footer-links { flex-wrap: wrap; justify-content: center; }
    .services-grid { grid-template-columns: 1fr; }
    .competences-grid { grid-template-columns: 1fr 1fr; }
    .tech-grid { grid-template-columns: 1fr; }
    .hero h1::after { display: none; }
}

@media (max-width: 480px) {
    .competences-grid { grid-template-columns: 1fr; }
    .about-stats { grid-template-columns: 1fr; }
}