@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600&family=Montserrat:wght@400;500;600;700;800;900&family=Orbitron:wght@700;900&family=Roboto+Mono:wght@300;400;500&display=swap');

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
:root {
  --dassault-navy: #00264A;
  --dassault-dark: #07121F;
  --cyan: #00E5FF;
  --cyan-dim: #00b3cc;
  --orange: #FF6B2B;
  --orange-dim: #cc5522;
  --white: #FFFFFF;
  --off-white: #F4F7F9;
  --tech-grey: #E2E8F0;
  --surface: #F8FAFC;
  --surface-border: #CBD5E1;
  --text-dark: #0F172A;
  --text-dim: #475569;
  --grid-line: rgba(0, 38, 74, 0.04);
}
html { scroll-behavior: smooth; }
body { background: var(--white); color: var(--text-dark); font-family: 'Inter', sans-serif; font-weight: 300; line-height: 1.7; overflow-x: hidden; }
::selection { background: var(--cyan); color: var(--dassault-dark); }
:focus-visible { outline: 2px solid var(--cyan); outline-offset: 3px; }

@keyframes fadeUp { from { opacity: 0; transform: translateY(32px); } to { opacity: 1; transform: translateY(0); } }
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
@keyframes lineExpand { from { transform: scaleX(0); } to { transform: scaleX(1); } }

.reveal { opacity: 0; transform: translateY(24px); }
.reveal.visible { animation: fadeUp 700ms cubic-bezier(0.2, 1, 0.3, 1) forwards; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 56px; }
@media (max-width: 640px) { .container { padding: 0 24px; } }

.sec-eyebrow { font-family: 'Roboto Mono', monospace; font-size: 11px; font-weight: 500; letter-spacing: 0.25em; color: var(--dassault-navy); text-transform: uppercase; display: block; margin-bottom: 20px; }
.sec-eyebrow::before { content: ''; display: inline-block; width: 16px; height: 1px; background: var(--cyan); margin-right: 10px; vertical-align: middle; }
.sec-title { font-family: 'Montserrat', sans-serif; font-weight: 600; font-size: clamp(32px, 4vw, 44px); color: var(--dassault-dark); letter-spacing: -0.02em; line-height: 1.2; margin-bottom: 64px; }

#nav { position: fixed; top: 0; left: 0; right: 0; z-index: 100; padding: 0 56px; height: 80px; display: flex; align-items: center; justify-content: space-between; background: rgba(255,255,255,0.92); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px); border-bottom: 1px solid var(--surface-border); transition: background 400ms, border-color 400ms, height 400ms, box-shadow 400ms; }
#nav.scrolled { background: rgba(255,255,255,0.98); height: 64px; box-shadow: 0 4px 20px rgba(0, 38, 74, 0.05); }
.nav-logo { opacity: 0; animation: fadeIn 500ms ease-out 100ms forwards; display: flex; align-items: center; }
.nav-links { display: flex; align-items: center; gap: 40px; list-style: none; }
.nav-links a { font-family: 'Inter', sans-serif; font-weight: 500; font-size: 14px; letter-spacing: 0.02em; color: var(--dassault-dark); text-decoration: none; transition: color 200ms; position: relative; }
.nav-links a::after { content: ''; position: absolute; left: 0; bottom: -4px; width: 100%; height: 1px; background: var(--cyan); transform: scaleX(0); transform-origin: right; transition: transform 300ms cubic-bezier(0.2,1,0.3,1); }
.nav-links a:hover { color: var(--cyan-dim); }
.nav-links a:hover::after { transform: scaleX(1); transform-origin: left; }

.btn-nav-cta { font-family: 'Inter', sans-serif; font-weight: 500; font-size: 13px; color: var(--white); background: var(--orange); padding: 12px 24px; cursor: pointer; text-decoration: none; display: inline-block; letter-spacing: 0.02em; transition: background 250ms, box-shadow 250ms; }
.btn-nav-cta:hover { background: var(--orange-dim); box-shadow: 0 4px 12px rgba(255, 107, 43, 0.2); }

#hamburger { display: none; background: none; border: none; cursor: pointer; padding: 4px; flex-direction: column; gap: 5px; }
#hamburger span { display: block; width: 22px; height: 1.5px; background: var(--dassault-dark); transition: transform 300ms, opacity 300ms; }
#hamburger.open span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); background: var(--white); }
#hamburger.open span:nth-child(2) { opacity: 0; }
#hamburger.open span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); background: var(--white); }

#drawer { display: none; position: fixed; top: 0; right: 0; width: 300px; height: 100%; background: var(--dassault-dark); z-index: 200; padding: 100px 48px 48px; flex-direction: column; gap: 32px; transform: translateX(100%); transition: transform 400ms cubic-bezier(0.2, 1, 0.3, 1); border-left: 1px solid rgba(255,255,255,0.1); }
#drawer.open { transform: translateX(0); }
#drawer a { font-family: 'Inter', sans-serif; font-size: 16px; color: rgba(255,255,255,0.7); text-decoration: none; transition: color 200ms; }
#drawer a:hover { color: var(--white); }
#overlay { display: none; position: fixed; inset: 0; background: rgba(0,38,74,0.6); backdrop-filter: blur(4px); z-index: 150; }

#hero { position: relative; height: 100vh; min-height: 700px; display: flex; align-items: center; overflow: hidden; background: var(--surface); }
.hero-bg-layer { position: absolute; right: 0; top: 0; bottom: 0; width: 45%; background-image: url('assets/hero_bambulab.png'); background-size: cover; background-position: right center; border-left: 1px solid var(--surface-border); }
.hero-bg-overlay { position: absolute; inset: 0; background: linear-gradient(90deg, var(--surface) 0%, rgba(248,250,252,0.9) 30%, transparent 100%); }
#hero::before { content: ''; position: absolute; inset: 0; background-image: linear-gradient(var(--grid-line) 1px, transparent 1px), linear-gradient(90deg, var(--grid-line) 1px, transparent 1px); background-size: 64px 64px; pointer-events: none; z-index: 1; }
.hero-inner { position: relative; z-index: 2; padding: 0 56px; max-width: 1200px; margin: 0 auto; width: 100%; }
.hero-content { max-width: 600px; }
.hero-eyebrow { font-family: 'Roboto Mono', monospace; font-size: 12px; font-weight: 500; letter-spacing: 0.2em; color: var(--text-dim); text-transform: uppercase; margin-bottom: 24px; display: inline-block; background: rgba(0,229,255,0.1); padding: 6px 14px; border-radius: 2px; opacity: 0; animation: fadeIn 500ms ease-out 200ms forwards; }
.hero-title { font-family: 'Montserrat', sans-serif; font-weight: 800; font-size: clamp(48px, 6vw, 76px); line-height: 1.05; letter-spacing: -1px; color: var(--dassault-dark); opacity: 0; animation: fadeUp 700ms cubic-bezier(0.2, 1, 0.3, 1) 350ms forwards; }
.hero-title span { display: block; }
.hero-title .highlight { color: var(--dassault-navy); }
.hero-divider { width: 80px; height: 3px; background: var(--orange); margin: 32px 0; transform-origin: left; transform: scaleX(0); animation: lineExpand 600ms cubic-bezier(0.2, 1, 0.3, 1) 800ms forwards; }
.hero-sub { font-family: 'Inter', sans-serif; font-size: 18px; color: var(--text-dim); line-height: 1.7; opacity: 0; animation: fadeIn 500ms ease-out 700ms forwards; }
.hero-btns { display: flex; gap: 16px; margin-top: 48px; flex-wrap: wrap; opacity: 0; animation: fadeIn 500ms ease-out 900ms forwards; }
.btn-primary { font-family: 'Inter', sans-serif; font-weight: 500; font-size: 15px; color: var(--white); background: var(--dassault-navy); padding: 16px 36px; text-decoration: none; display: inline-block; transition: background 250ms, box-shadow 250ms; }
.btn-primary:hover { background: var(--dassault-dark); box-shadow: 0 8px 16px rgba(0, 38, 74, 0.15); }
.btn-ghost { font-family: 'Inter', sans-serif; font-weight: 500; font-size: 15px; color: var(--dassault-navy); background: transparent; border: 1px solid var(--surface-border); padding: 15px 35px; text-decoration: none; display: inline-block; transition: border-color 250ms, background 250ms; }
.btn-ghost:hover { border-color: var(--dassault-navy); background: rgba(0,38,74,0.02); }
.hero-scroll { position: absolute; bottom: 48px; left: 56px; z-index: 2; display: flex; align-items: center; gap: 16px; font-family: 'Roboto Mono', monospace; font-size: 10px; letter-spacing: 0.2em; color: var(--text-dim); text-transform: uppercase; opacity: 0; animation: fadeIn 500ms ease-out 1100ms forwards; }
.hero-scroll::before { content: ''; display: block; width: 1px; height: 40px; background: var(--surface-border); }

#stats { background: var(--white); border-top: 1px solid var(--surface-border); padding: 64px 0; }
.stats-grid { display: grid; grid-template-columns: repeat(3, max-content); justify-content: center; gap: 100px; }
.stat-item { position: relative; padding-left: 24px; border-left: 2px solid var(--surface-border); }
.stat-num { font-family: 'Montserrat', sans-serif; font-weight: 700; font-size: 48px; color: var(--dassault-navy); line-height: 1; display: block; margin-bottom: 8px; }
.stat-suffix { font-weight: 400; font-size: 32px; color: var(--cyan); }
.stat-label { font-family: 'Roboto Mono', monospace; font-size: 12px; font-weight: 500; color: var(--text-dim); display: block; text-transform: uppercase; letter-spacing: 0.05em; }

#services { padding: 140px 0; background: var(--off-white); }
.services-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; }
.service-card { background: var(--white); padding: 48px 40px; border: 1px solid var(--surface-border); transition: transform 300ms, box-shadow 300ms, border-color 300ms; position: relative; overflow: hidden; }
.service-card:hover { transform: translateY(-4px); border-color: var(--cyan); box-shadow: 0 12px 32px rgba(0, 38, 74, 0.05); }
.service-num { font-family: 'Roboto Mono', monospace; font-size: 11px; letter-spacing: 0.2em; color: var(--surface-border); margin-bottom: 32px; display: block; font-weight: 600; }
.service-img-wrap { height: 160px; margin-bottom: 32px; background: var(--surface); display: flex; align-items: center; justify-content: center; overflow: hidden; }
.service-img-wrap img { width: 100%; height: 100%; object-fit: cover; filter: sepia(0.2) hue-rotate(180deg) saturate(0.8) brightness(1.05); transition: filter 400ms; }
.service-card:hover .service-img-wrap img { filter: sepia(0) hue-rotate(0) saturate(1) brightness(1); }
.service-title { font-family: 'Montserrat', sans-serif; font-weight: 600; font-size: 20px; color: var(--dassault-dark); margin-bottom: 16px; line-height: 1.3; }
.service-desc { font-family: 'Inter', sans-serif; font-weight: 300; font-size: 15px; color: var(--text-dim); line-height: 1.7; }

#realisations { padding: 140px 0; background: var(--white); }
.portfolio-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--surface-border); border: 1px solid var(--surface-border); }
.portfolio-card { background: var(--white); position: relative; overflow: hidden; cursor: pointer; }
.portfolio-card:hover .p-img-overlay { opacity: 1; }
.portfolio-card:hover .portfolio-img img { transform: scale(1.05); }
.portfolio-img { position: relative; height: 260px; background: var(--surface); overflow: hidden; }
.portfolio-img img { width: 100%; height: 100%; object-fit: cover; transition: transform 600ms cubic-bezier(0.2, 1, 0.3, 1); }
.p-img-overlay { position: absolute; inset: 0; background: rgba(0,38,74,0.85); opacity: 0; transition: opacity 300ms; display: flex; flex-direction: column; justify-content: center; align-items: center; padding: 24px; }
.p-overlay-text { font-family: 'Roboto Mono', monospace; font-size: 12px; color: var(--cyan); letter-spacing: 0.1em; text-transform: uppercase; margin-bottom: 12px; }
.p-overlay-line { width: 40px; height: 1px; background: var(--white); }
.p-badge-mat { position: absolute; bottom: 0; right: 0; background: var(--dassault-dark); font-family: 'Roboto Mono', monospace; font-size: 10px; font-weight: 500; letter-spacing: 0.15em; color: var(--white); padding: 8px 14px; text-transform: uppercase; z-index: 2; }
.portfolio-body { padding: 24px 32px; border-top: 1px solid var(--surface-border); }
.p-title { font-family: 'Montserrat', sans-serif; font-weight: 600; font-size: 16px; color: var(--dassault-dark); margin-bottom: 6px; }
.p-badge-sec { font-family: 'Inter', sans-serif; font-size: 13px; color: var(--text-dim); }

#matieres { padding: 140px 0; background: var(--off-white); }
.matieres-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 24px; }
.mat-card { background: var(--white); border: 1px solid var(--surface-border); padding: 0; transition: border-color 300ms; display: flex; flex-direction: column; }
.mat-card:hover { border-color: var(--dassault-navy); }
.mat-img { height: 140px; background: var(--white); border-bottom: 1px solid var(--surface-border); padding: 10px; display: flex; align-items: center; justify-content: center; }
.mat-img img { max-height: 100%; object-fit: contain; }
.mat-body { padding: 24px; flex-grow: 1; }
.mat-name { font-family: 'Montserrat', sans-serif; font-size: 18px; font-weight: 700; margin-bottom: 12px; color: var(--dassault-dark); }
.mat-usage { font-family: 'Inter', sans-serif; font-size: 13px; color: var(--text-dim); line-height: 1.6; }

#pourquoi { padding: 140px 0; background: var(--white); }
.pourquoi-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 64px; }
.pourquoi-item { padding-left: 24px; border-left: 1px solid var(--surface-border); transition: border-color 300ms; }
.pourquoi-item:hover { border-color: var(--cyan); }
.pourquoi-label { font-family: 'Roboto Mono', monospace; font-size: 11px; letter-spacing: 0.15em; color: var(--orange); text-transform: uppercase; margin-bottom: 16px; display: block; }
.pourquoi-title { font-family: 'Montserrat', sans-serif; font-weight: 600; font-size: 20px; color: var(--dassault-dark); margin-bottom: 14px; line-height: 1.3; }
.pourquoi-text { font-family: 'Inter', sans-serif; font-size: 15px; color: var(--text-dim); line-height: 1.7; }

#contact { padding: 140px 0; background: var(--surface); border-top: 1px solid var(--surface-border); }
.contact-layout { display: grid; grid-template-columns: 1fr 360px; gap: 80px; align-items: start; }
.form-group { margin-bottom: 24px; }
.form-label { display: block; font-family: 'Inter', sans-serif; font-size: 13px; font-weight: 500; color: var(--dassault-dark); margin-bottom: 8px; }
.form-input, .form-select, .form-textarea { width: 100%; background: var(--white); border: 1px solid var(--surface-border); color: var(--text-dark); font-family: 'Inter', sans-serif; font-size: 15px; padding: 14px 18px; outline: none; transition: border-color 250ms, box-shadow 250ms; appearance: none; border-radius: 0; }
.form-input:focus, .form-select:focus, .form-textarea:focus { border-color: var(--cyan); box-shadow: 0 0 0 3px rgba(0,180,216,0.1); }
.form-input::placeholder, .form-textarea::placeholder { color: #94A3B8; }
.form-select { background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6'%3E%3Cpath d='M0 0l5 6 5-6z' fill='%2364748B'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: right 18px center; cursor: pointer; }
.form-textarea { resize: vertical; min-height: 140px; }
.btn-submit { font-family: 'Inter', sans-serif; font-weight: 500; font-size: 15px; letter-spacing: 0.02em; color: var(--white); background: var(--orange); border: none; padding: 18px 36px; cursor: pointer; width: 100%; margin-top: 12px; transition: background 250ms; }
.btn-submit:hover { background: var(--orange-dim); }

.aside-block { border-top: 1px solid var(--surface-border); padding-top: 24px; margin-bottom: 24px; }
.aside-label { font-family: 'Roboto Mono', monospace; font-size: 10px; letter-spacing: 0.2em; color: var(--text-dim); text-transform: uppercase; margin-bottom: 10px; display: block; }
.aside-value { font-family: 'Inter', sans-serif; font-size: 15px; color: var(--dassault-dark); font-weight: 500; display: block; line-height: 1.5; }
.aside-value a { color: var(--cyan-dim); text-decoration: none; transition: color 200ms; }
.aside-value a:hover { color: var(--dassault-navy); }

.response-badge { display: inline-flex; align-items: center; gap: 12px; background: var(--white); border: 1px solid var(--surface-border); padding: 14px 20px; margin-bottom: 48px; }
.response-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--cyan); flex-shrink: 0; box-shadow: 0 0 0 3px rgba(0, 180, 216, 0.2); }
.response-text { font-family: 'Roboto Mono', monospace; font-size: 11px; font-weight: 500; letter-spacing: 0.05em; color: var(--dassault-dark); text-transform: uppercase; }

#footer { background: var(--dassault-dark); padding: 80px 0 60px; position: relative; color: rgba(255,255,255,0.7); border-top: 4px solid var(--dassault-navy); }
.footer-inner { display: flex; justify-content: space-between; align-items: flex-start; gap: 40px; flex-wrap: wrap; }
.footer-copy { font-family: 'Inter', sans-serif; font-size: 13px; line-height: 1.8; margin-top: 24px; }
.footer-links { display: flex; flex-direction: column; gap: 12px; }
.footer-link { font-family: 'Inter', sans-serif; font-size: 14px; color: rgba(255,255,255,0.7); text-decoration: none; transition: color 200ms; }
.footer-link:hover { color: var(--cyan); }

@media (max-width: 1024px) { #nav { padding: 0 32px; } .hero-inner { padding: 0 32px; } .hero-bg-layer { display: none; } .services-grid { grid-template-columns: 1fr 1fr; } .portfolio-grid { grid-template-columns: 1fr 1fr; } .matieres-grid { grid-template-columns: repeat(3, 1fr); } .pourquoi-grid { grid-template-columns: 1fr 1fr; } .contact-layout { grid-template-columns: 1fr; } .stats-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 640px) { #nav { padding: 0 24px; } .nav-links, .btn-nav-cta { display: none; } #hamburger { display: flex; } .hero-inner { padding: 0 24px; } .hero-title { font-size: 40px; } .stats-grid { grid-template-columns: 1fr; gap: 24px; } .stat-item { border-left: none; border-bottom: 1px solid var(--surface-border); padding-left: 0; padding-bottom: 24px; } .services-grid { grid-template-columns: 1fr; } .portfolio-grid { grid-template-columns: 1fr; } .matieres-grid { grid-template-columns: 1fr; } .pourquoi-grid { grid-template-columns: 1fr; gap: 40px; } .pourquoi-item { border-left: none; padding-left: 0; padding-top: 16px; border-top: 1px solid var(--surface-border); } .footer-inner { flex-direction: column; } }