/* ============================================
   NT DIGITAL CONSEIL - Expert Automatisation IA
   Design System & Styles v2.0
   ============================================ */

:root {
  --color-bg-primary: #0a0f14;
  --color-bg-secondary: #0f1419;
  --color-bg-tertiary: #151c24;
  --color-bg-card: #131a22;
  --color-bg-glass: rgba(19, 26, 34, 0.9);
  --color-accent-primary: #4fc3f7;
  --color-accent-secondary: #81d4fa;
  --color-accent-dark: #0288d1;
  --color-accent-gradient: linear-gradient(135deg, #4fc3f7 0%, #81d4fa 50%, #29b6f6 100%);
  --color-accent-glow: rgba(79, 195, 247, 0.4);
  --color-text-primary: #ffffff;
  --color-text-secondary: #b0bec5;
  --color-text-muted: #78909c;
  --color-success: #4caf50;
  --color-warning: #ff9800;
  --color-error: #f44336;
  --font-display: 'Space Grotesk', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-body: 'DM Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2rem;
  --space-xl: 3rem;
  --space-2xl: 5rem;
  --space-3xl: 8rem;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 32px;
  --radius-full: 9999px;
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.5);
  --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.6);
  --shadow-glow: 0 0 40px var(--color-accent-glow);
  --shadow-glow-strong: 0 0 60px var(--color-accent-glow), 0 0 100px rgba(79, 195, 247, 0.2);
  --transition-fast: 0.15s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
  --container-max: 1200px;
  --container-narrow: 800px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body { font-family: var(--font-body); background-color: var(--color-bg-primary); color: var(--color-text-primary); line-height: 1.7; overflow-x: hidden; -webkit-font-smoothing: antialiased; }
body::before { content: ''; position: fixed; top: 0; left: 0; width: 100%; height: 100%; background-image: radial-gradient(ellipse at 15% 15%, rgba(79, 195, 247, 0.08) 0%, transparent 50%), radial-gradient(ellipse at 85% 85%, rgba(129, 212, 250, 0.06) 0%, transparent 50%); pointer-events: none; z-index: -1; }
a { color: inherit; text-decoration: none; transition: var(--transition-fast); }
img { max-width: 100%; height: auto; display: block; }
ul, ol { list-style: none; }

h1, h2, h3, h4, h5, h6 { font-family: var(--font-display); font-weight: 700; line-height: 1.2; letter-spacing: -0.02em; }
h1 { font-size: clamp(2.5rem, 6vw, 4.5rem); }
h2 { font-size: clamp(2rem, 4vw, 3rem); }
h3 { font-size: clamp(1.5rem, 3vw, 2rem); }
h4 { font-size: clamp(1.25rem, 2vw, 1.5rem); }
p { color: var(--color-text-secondary); font-size: 1.1rem; }
.text-gradient { background: var(--color-accent-gradient); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.text-accent { color: var(--color-accent-primary); }

.container { width: 100%; max-width: var(--container-max); margin: 0 auto; padding: 0 var(--space-md); }
section { padding: var(--space-3xl) 0; position: relative; }
.section-header { text-align: center; margin-bottom: var(--space-2xl); }
.section-header p { margin-top: var(--space-sm); max-width: 600px; margin-left: auto; margin-right: auto; }
.section-label { display: inline-block; padding: var(--space-xs) var(--space-sm); background: rgba(79, 195, 247, 0.1); border: 1px solid rgba(79, 195, 247, 0.2); border-radius: var(--radius-full); font-size: 0.85rem; font-weight: 500; color: var(--color-accent-primary); text-transform: uppercase; letter-spacing: 0.1em; margin-bottom: var(--space-md); }

.navbar { position: fixed; top: 0; left: 0; right: 0; z-index: 1000; padding: var(--space-sm) 0; transition: var(--transition-normal); background: transparent; }
.navbar.scrolled { background: var(--color-bg-glass); backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px); border-bottom: 1px solid rgba(79, 195, 247, 0.1); box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3); }
.navbar .container { display: flex; align-items: center; justify-content: space-between; }
.logo { display: flex; align-items: center; gap: var(--space-sm); }
.logo img { height: 50px; width: auto; }
.nav-menu { display: flex; align-items: center; gap: var(--space-lg); }
.nav-link { font-size: 0.95rem; font-weight: 500; color: var(--color-text-secondary); transition: var(--transition-fast); position: relative; padding: var(--space-xs) 0; }
.nav-link:hover { color: var(--color-text-primary); }
.nav-link::after { content: ''; position: absolute; bottom: 0; left: 0; width: 0; height: 2px; background: var(--color-accent-gradient); transition: var(--transition-normal); }
.nav-link:hover::after { width: 100%; }
.nav-cta { margin-left: var(--space-sm); }
.menu-toggle { display: none; flex-direction: column; gap: 5px; background: none; border: none; cursor: pointer; padding: var(--space-xs); z-index: 1001; }
.menu-toggle span { display: block; width: 24px; height: 2px; background: var(--color-text-primary); transition: var(--transition-fast); }
.menu-toggle.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.menu-toggle.active span:nth-child(2) { opacity: 0; }
.menu-toggle.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

.btn { display: inline-flex; align-items: center; justify-content: center; gap: var(--space-xs); padding: 0.875rem 1.75rem; font-family: var(--font-display); font-size: 0.95rem; font-weight: 600; border-radius: var(--radius-full); border: none; cursor: pointer; transition: var(--transition-normal); text-decoration: none; white-space: nowrap; position: relative; overflow: hidden; }
.btn-primary { background: var(--color-accent-gradient); color: var(--color-bg-primary); box-shadow: var(--shadow-glow); }
.btn-primary:hover { transform: translateY(-3px); box-shadow: var(--shadow-glow-strong); }
.btn-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: 0.5s; }
.btn-primary:hover::before { left: 100%; }
.btn-secondary { background: transparent; color: var(--color-text-primary); border: 2px solid rgba(79, 195, 247, 0.3); }
.btn-secondary:hover { background: rgba(79, 195, 247, 0.1); border-color: var(--color-accent-primary); transform: translateY(-2px); }
.btn-lg { padding: 1.125rem 2.25rem; font-size: 1.05rem; }
.btn-icon { width: 20px; height: 20px; }

.hero { min-height: 100vh; display: flex; align-items: center; padding-top: 100px; position: relative; overflow: hidden; }
.hero-content { position: relative; z-index: 2; max-width: 750px; }
.hero-badge { display: inline-flex; align-items: center; gap: var(--space-xs); padding: 0.6rem 1.25rem; background: rgba(79, 195, 247, 0.1); border: 1px solid rgba(79, 195, 247, 0.3); border-radius: var(--radius-full); font-size: 0.9rem; font-weight: 500; color: var(--color-accent-primary); margin-bottom: var(--space-lg); animation: fadeInUp 0.6s ease forwards; }
.hero-badge-dot { width: 8px; height: 8px; background: var(--color-accent-primary); border-radius: 50%; animation: pulse 2s infinite; box-shadow: 0 0 10px var(--color-accent-primary); }
.hero h1 { margin-bottom: var(--space-md); animation: fadeInUp 0.6s ease 0.1s forwards; opacity: 0; }
.hero-description { font-size: 1.3rem; margin-bottom: var(--space-lg); animation: fadeInUp 0.6s ease 0.2s forwards; opacity: 0; line-height: 1.8; }
.hero-ctas { display: flex; gap: var(--space-sm); flex-wrap: wrap; animation: fadeInUp 0.6s ease 0.3s forwards; opacity: 0; }
.hero-visual { position: absolute; right: -5%; top: 50%; transform: translateY(-50%); width: 550px; height: 550px; z-index: 1; }
.hero-orb { position: absolute; border-radius: 50%; filter: blur(80px); animation: float 8s ease-in-out infinite; }
.hero-orb-1 { width: 400px; height: 400px; background: radial-gradient(circle, rgba(79, 195, 247, 0.35) 0%, transparent 70%); top: 0; right: 0; }
.hero-orb-2 { width: 300px; height: 300px; background: radial-gradient(circle, rgba(129, 212, 250, 0.25) 0%, transparent 70%); bottom: 50px; right: 100px; animation-delay: -4s; }

.stats { padding: var(--space-2xl) 0; background: var(--color-bg-secondary); border-top: 1px solid rgba(79, 195, 247, 0.1); border-bottom: 1px solid rgba(79, 195, 247, 0.1); }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-lg); }
.stat-item { text-align: center; padding: var(--space-md); position: relative; }
.stat-item::after { content: ''; position: absolute; right: 0; top: 20%; height: 60%; width: 1px; background: linear-gradient(180deg, transparent, rgba(79, 195, 247, 0.3), transparent); }
.stat-item:last-child::after { display: none; }
.stat-value { font-family: var(--font-display); font-size: clamp(2.5rem, 5vw, 3.5rem); font-weight: 700; background: var(--color-accent-gradient); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; line-height: 1; margin-bottom: var(--space-xs); }
.stat-label { font-size: 0.95rem; color: var(--color-text-secondary); }

.credentials { padding: var(--space-xl) 0; background: var(--color-bg-secondary); }
.credentials-grid { display: flex; justify-content: center; align-items: center; gap: var(--space-xl); flex-wrap: wrap; }
.credential-item { display: flex; align-items: center; gap: var(--space-sm); padding: var(--space-md) var(--space-lg); background: var(--color-bg-tertiary); border-radius: var(--radius-lg); border: 1px solid rgba(79, 195, 247, 0.1); transition: var(--transition-normal); }
.credential-item:hover { border-color: rgba(79, 195, 247, 0.3); transform: translateY(-2px); box-shadow: var(--shadow-md); }
.credential-icon { width: 48px; height: 48px; display: flex; align-items: center; justify-content: center; background: var(--color-accent-gradient); border-radius: var(--radius-md); font-size: 1.5rem; }
.credential-text { font-size: 0.95rem; font-weight: 600; }
.credential-text span { display: block; font-size: 0.8rem; color: var(--color-text-muted); font-weight: 400; margin-top: 2px; }

.services { background: var(--color-bg-primary); }
.services-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-lg); }
.service-card { position: relative; padding: var(--space-xl); background: var(--color-bg-card); border-radius: var(--radius-lg); border: 1px solid rgba(79, 195, 247, 0.1); transition: var(--transition-normal); overflow: hidden; }
.service-card::before { content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px; background: var(--color-accent-gradient); opacity: 0; transition: var(--transition-normal); }
.service-card:hover { transform: translateY(-8px); border-color: rgba(79, 195, 247, 0.3); box-shadow: var(--shadow-lg), 0 0 30px rgba(79, 195, 247, 0.1); }
.service-card:hover::before { opacity: 1; }
.service-icon { width: 72px; height: 72px; display: flex; align-items: center; justify-content: center; background: rgba(79, 195, 247, 0.1); border-radius: var(--radius-lg); font-size: 2.25rem; margin-bottom: var(--space-lg); border: 1px solid rgba(79, 195, 247, 0.2); }
.service-card h3 { margin-bottom: var(--space-sm); font-size: 1.5rem; }
.service-card > p { font-size: 1rem; margin-bottom: var(--space-md); line-height: 1.7; }
.service-features { margin-bottom: var(--space-lg); }
.service-features li { display: flex; align-items: center; gap: var(--space-sm); font-size: 0.95rem; color: var(--color-text-secondary); padding: var(--space-xs) 0; }
.service-features li::before { content: '✓'; color: var(--color-success); font-weight: 700; font-size: 0.9rem; }
.service-link { display: inline-flex; align-items: center; gap: var(--space-xs); color: var(--color-accent-primary); font-weight: 600; font-size: 0.95rem; transition: var(--transition-fast); }
.service-link:hover { gap: var(--space-sm); }
.service-link svg { transition: var(--transition-fast); }
.service-link:hover svg { transform: translateX(4px); }

.about { background: var(--color-bg-secondary); }
.about-grid { display: grid; grid-template-columns: 400px 1fr; gap: var(--space-2xl); align-items: center; }
.about-image { position: relative; }
.about-image img { border-radius: var(--radius-xl); box-shadow: var(--shadow-lg); border: 2px solid rgba(79, 195, 247, 0.2); }
.about-image::before { content: ''; position: absolute; top: -10px; left: -10px; right: 10px; bottom: 10px; border: 2px solid var(--color-accent-primary); border-radius: var(--radius-xl); opacity: 0.3; z-index: -1; }
.about-content h2 { margin-bottom: var(--space-md); }
.about-content > p { margin-bottom: var(--space-md); font-size: 1.1rem; }
.about-highlights { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--space-md); margin-top: var(--space-lg); }
.about-highlight { display: flex; align-items: flex-start; gap: var(--space-sm); }
.about-highlight-icon { width: 40px; height: 40px; display: flex; align-items: center; justify-content: center; background: rgba(79, 195, 247, 0.1); border-radius: var(--radius-sm); font-size: 1.25rem; flex-shrink: 0; }
.about-highlight h4 { font-size: 1rem; margin-bottom: 2px; }
.about-highlight p { font-size: 0.9rem; color: var(--color-text-muted); }

.process { background: var(--color-bg-primary); }
.process-steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-lg); position: relative; }
.process-steps::before { content: ''; position: absolute; top: 50px; left: 12%; right: 12%; height: 2px; background: linear-gradient(90deg, transparent, var(--color-accent-primary), var(--color-accent-secondary), transparent); opacity: 0.3; }
.process-step { text-align: center; position: relative; }
.step-number { width: 100px; height: 100px; display: flex; align-items: center; justify-content: center; background: var(--color-bg-tertiary); border: 2px solid var(--color-accent-primary); border-radius: 50%; font-family: var(--font-display); font-size: 2rem; font-weight: 700; color: var(--color-accent-primary); margin: 0 auto var(--space-md); position: relative; z-index: 2; box-shadow: 0 0 30px rgba(79, 195, 247, 0.2); }
.process-step h4 { margin-bottom: var(--space-xs); font-size: 1.25rem; }
.process-step p { font-size: 0.95rem; }

.testimonials { background: var(--color-bg-secondary); }
.testimonials-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-lg); }
.testimonial-card { padding: var(--space-xl); background: var(--color-bg-card); border-radius: var(--radius-lg); border: 1px solid rgba(79, 195, 247, 0.1); transition: var(--transition-normal); position: relative; }
.testimonial-card::before { content: '"'; position: absolute; top: var(--space-md); right: var(--space-lg); font-size: 4rem; font-family: Georgia, serif; color: var(--color-accent-primary); opacity: 0.2; line-height: 1; }
.testimonial-card:hover { border-color: rgba(79, 195, 247, 0.3); transform: translateY(-4px); }
.testimonial-stars { color: #ffc107; font-size: 1.25rem; margin-bottom: var(--space-md); letter-spacing: 2px; }
.testimonial-text { font-size: 1rem; font-style: italic; margin-bottom: var(--space-lg); color: var(--color-text-secondary); line-height: 1.8; }
.testimonial-author { display: flex; align-items: center; gap: var(--space-sm); }
.testimonial-avatar { width: 56px; height: 56px; border-radius: var(--radius-md); object-fit: contain; background: var(--color-bg-tertiary); padding: 6px; }
.testimonial-info h5 { font-size: 1rem; font-weight: 600; }
.testimonial-info span { font-size: 0.85rem; color: var(--color-text-muted); }

.cta-section { padding: var(--space-3xl) 0; background: var(--color-bg-primary); position: relative; overflow: hidden; }
.cta-section::before { content: ''; position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%); width: 800px; height: 800px; background: radial-gradient(circle, rgba(79, 195, 247, 0.15) 0%, transparent 60%); pointer-events: none; }
.cta-content { text-align: center; position: relative; z-index: 2; max-width: 700px; margin: 0 auto; }
.cta-content h2 { margin-bottom: var(--space-md); }
.cta-content p { margin-bottom: var(--space-lg); font-size: 1.15rem; }
.cta-buttons { display: flex; justify-content: center; gap: var(--space-sm); flex-wrap: wrap; }

.footer { padding: var(--space-2xl) 0 var(--space-lg); background: var(--color-bg-secondary); border-top: 1px solid rgba(79, 195, 247, 0.1); }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1.5fr; gap: var(--space-2xl); margin-bottom: var(--space-2xl); }
.footer-brand .logo { margin-bottom: var(--space-sm); }
.footer-brand > p { font-size: 0.95rem; max-width: 280px; line-height: 1.7; }
.footer-social { display: flex; gap: var(--space-sm); margin-top: var(--space-md); }
.social-link { width: 44px; height: 44px; display: flex; align-items: center; justify-content: center; background: var(--color-bg-tertiary); border-radius: var(--radius-md); color: var(--color-text-secondary); transition: var(--transition-fast); border: 1px solid transparent; }
.social-link:hover { background: var(--color-accent-primary); color: var(--color-bg-primary); border-color: var(--color-accent-primary); transform: translateY(-2px); }
.footer-column h4 { font-size: 1rem; margin-bottom: var(--space-md); color: var(--color-text-primary); }
.footer-links li { margin-bottom: var(--space-sm); }
.footer-links a { font-size: 0.95rem; color: var(--color-text-secondary); transition: var(--transition-fast); }
.footer-links a:hover { color: var(--color-accent-primary); padding-left: 4px; }
.footer-contact-item { display: flex; align-items: center; gap: var(--space-sm); font-size: 0.95rem; color: var(--color-text-secondary); margin-bottom: var(--space-sm); }
.footer-contact-item svg { flex-shrink: 0; color: var(--color-accent-primary); }
.footer-bottom { display: flex; justify-content: space-between; align-items: center; padding-top: var(--space-lg); border-top: 1px solid rgba(79, 195, 247, 0.1); font-size: 0.85rem; color: var(--color-text-muted); }

.page-header { padding: 160px 0 80px; background: var(--color-bg-secondary); text-align: center; position: relative; overflow: hidden; }
.page-header::before { content: ''; position: absolute; top: -50%; left: 50%; transform: translateX(-50%); width: 800px; height: 800px; background: radial-gradient(circle, rgba(79, 195, 247, 0.1) 0%, transparent 60%); pointer-events: none; }
.page-header h1 { margin-bottom: var(--space-sm); position: relative; }
.page-header p { max-width: 600px; margin: 0 auto; position: relative; font-size: 1.15rem; }

@keyframes fadeInUp { from { opacity: 0; transform: translateY(30px); } to { opacity: 1; transform: translateY(0); } }
@keyframes pulse { 0%, 100% { opacity: 1; box-shadow: 0 0 10px var(--color-accent-primary); } 50% { opacity: 0.6; box-shadow: 0 0 20px var(--color-accent-primary); } }
@keyframes float { 0%, 100% { transform: translateY(0) scale(1); } 50% { transform: translateY(-30px) scale(1.05); } }
.animate-on-scroll { opacity: 0; transform: translateY(40px); transition: opacity 0.6s ease, transform 0.6s ease; }
.animate-on-scroll.visible { opacity: 1; transform: translateY(0); }
.animate-delay-1 { transition-delay: 0.1s; }
.animate-delay-2 { transition-delay: 0.2s; }
.animate-delay-3 { transition-delay: 0.3s; }

@media (max-width: 1024px) {
  .hero-visual { display: none; }
  .services-grid, .testimonials-grid { grid-template-columns: repeat(2, 1fr); }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .stat-item:nth-child(2)::after { display: none; }
  .process-steps { grid-template-columns: repeat(2, 1fr); }
  .process-steps::before { display: none; }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
  .about-grid { grid-template-columns: 1fr; text-align: center; }
  .about-image { max-width: 350px; margin: 0 auto; }
}

@media (max-width: 768px) {
  section { padding: var(--space-2xl) 0; }
  .navbar .container { padding: 0 var(--space-sm); }
  .nav-menu { position: fixed; top: 0; right: -100%; width: 85%; max-width: 400px; height: 100vh; background: var(--color-bg-secondary); flex-direction: column; justify-content: center; padding: var(--space-2xl); transition: var(--transition-normal); border-left: 1px solid rgba(79, 195, 247, 0.1); box-shadow: -10px 0 40px rgba(0, 0, 0, 0.5); }
  .nav-menu.active { right: 0; }
  .nav-menu li { margin: var(--space-sm) 0; }
  .nav-link { font-size: 1.1rem; }
  .nav-cta { margin-left: 0; margin-top: var(--space-md); }
  .menu-toggle { display: flex; }
  .services-grid, .testimonials-grid, .stats-grid, .process-steps { grid-template-columns: 1fr; }
  .stat-item::after { display: none; }
  .hero { text-align: center; padding-top: 120px; }
  .hero-ctas { justify-content: center; }
  .hero-badge { font-size: 0.8rem; }
  .credentials-grid { flex-direction: column; gap: var(--space-md); }
  .credential-item { width: 100%; justify-content: center; }
  .footer-grid { grid-template-columns: 1fr; text-align: center; gap: var(--space-xl); }
  .footer-brand { display: flex; flex-direction: column; align-items: center; }
  .footer-brand > p { max-width: 100%; }
  .footer-social { justify-content: center; }
  .footer-bottom { flex-direction: column; gap: var(--space-sm); text-align: center; }
  .about-highlights { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
  :root { --space-3xl: 4rem; --space-2xl: 3rem; }
  h1 { font-size: 2rem; }
  h2 { font-size: 1.75rem; }
  .btn { width: 100%; justify-content: center; }
  .hero-ctas, .cta-buttons { flex-direction: column; }
  .service-card, .testimonial-card { padding: var(--space-lg); }
}

.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }
.text-center { text-align: center; }
.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }