/* ─────────────────────────────────────────────────────────
   NGI GROUPE — shared chrome (navbar, mobile menu, footer,
   reveal animations, buttons, tokens). Used by the /projets
   pages. Kept visually identical to index.html's inline
   styles; index.html itself is untouched by this file.
   ───────────────────────────────────────────────────────── */

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
:root {
  --blue:      #5BA3D0;
  --blue-mid:  #3D87B8;
  --blue-deep: #3A4A54;
  --silver:    #8C9BA5;
  --silver-lt: #B8C5CC;
  --silver-xs: #E6EAEC;
  --bg-lt:     #F4F6F7;
  --bg-mid:    #E6EAEC;
  --white:     #FFFFFF;
  --text:      #2E3D45;
  --text-mid:  #6B7D88;
  --ff-head:   'Poppins', sans-serif;
  --ff-body:   'Poppins', sans-serif;
  --ease:      cubic-bezier(0.22, 1, 0.36, 1);
}
html { scroll-behavior: smooth; font-size: 16px; }
body {
  background: var(--white);
  color: var(--text);
  font-family: var(--ff-body);
  overflow-x: hidden;
}
::selection { background: var(--silver-lt); color: var(--blue-deep); }
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-lt); }
::-webkit-scrollbar-thumb { background: var(--silver); border-radius: 3px; }

.container { max-width: 1200px; margin: 0 auto; padding: 0 2rem; }
.tag {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: #3f6593;
  margin-bottom: 1rem;
}
.tag::before { content: '─ '; }
h1, h2, h3 { font-family: var(--ff-head); }
.section-title {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 600;
  line-height: 1.15;
  color: #3f6593;
  margin-bottom: 1.5rem;
}
.section-title span { color: #3f6593; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.85rem 2rem;
  font-family: var(--ff-body);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: all 0.35s var(--ease);
}
.btn:hover { letter-spacing: 0.18em; }
.btn-primary { background: var(--white); color: var(--blue-deep); }
.btn-primary:hover { background: var(--bg-lt); transform: translateY(-2px); }
.btn-outline { background: transparent; color: var(--white); border: 1px solid rgba(255,255,255,0.5); }
.btn-outline:hover { background: rgba(255,255,255,0.15); border-color: var(--white); transform: translateY(-2px); }
.btn-dark { background: #3f6593; color: var(--white); }
.btn-dark:hover { background: #33547c; transform: translateY(-2px); box-shadow: 0 8px 24px rgba(27,110,194,0.3); }

/* ─── REVEAL ANIMATIONS ────────────────────────────── */
.reveal { opacity: 0; transform: translateY(40px); transition: opacity 0.8s var(--ease), transform 0.8s var(--ease); }
.reveal.visible { opacity: 1; transform: translateY(0); }
.reveal-left { opacity: 0; transform: translateX(-50px); transition: opacity 0.8s var(--ease), transform 0.8s var(--ease); }
.reveal-left.visible { opacity: 1; transform: translateX(0); }
.reveal-right { opacity: 0; transform: translateX(50px); transition: opacity 0.8s var(--ease), transform 0.8s var(--ease); }
.reveal-right.visible { opacity: 1; transform: translateX(0); }
.delay-1 { transition-delay: 0.1s; }
.delay-2 { transition-delay: 0.2s; }
.delay-3 { transition-delay: 0.3s; }
.delay-4 { transition-delay: 0.4s; }
.delay-5 { transition-delay: 0.5s; }

/* ─── NAVBAR ───────────────────────────────────────── */
#navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  padding: 0.75rem 0;
  background: rgba(0, 0, 0, 0.26);
  transition: all 0.4s var(--ease);
}
#navbar.scrolled {
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(12px);
  padding: 0.5rem 0;
  box-shadow: 0 2px 24px rgba(140,155,165,0.18);
}
#navbar.scrolled .nav-logo { color: var(--text); }
#navbar.scrolled .nav-links a { color: var(--text-mid); }
#navbar.scrolled .nav-links a:hover { color: var(--blue); }
#navbar.scrolled .nav-links a.active { color: var(--blue); }
#navbar.scrolled .lang-btn { color: rgba(26,46,68,0.45); }
#navbar.scrolled .lang-btn.active { color: var(--blue); }
#navbar.scrolled .lang-sep { color: var(--silver-lt); }
#navbar.scrolled .hamburger span { background: var(--text); }
.nav-inner { display: flex; align-items: center; justify-content: space-between; }
.nav-logo { display: flex; align-items: center; text-decoration: none; line-height: 1; }
.nav-logo-img {
  height: 90px;
  width: auto;
  display: block;
  flex-shrink: 0;
  mix-blend-mode: screen;
  filter: brightness(1.15) saturate(0.9);
  transition: filter 0.3s, mix-blend-mode 0s;
}
#navbar.scrolled .nav-logo-img { mix-blend-mode: multiply; filter: brightness(1) saturate(1); }
.nav-links { display: flex; align-items: center; gap: 1.7rem; list-style: none; }
.nav-links a {
  font-size: 0.85rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.75);
  text-decoration: none;
  transition: color 0.3s;
  position: relative;
}
.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px; left: 0;
  width: 0; height: 1px;
  background: var(--silver-lt);
  transition: width 0.3s var(--ease);
}
.nav-links a:hover { color: var(--white); }
.nav-links a:hover::after { width: 100%; }
.nav-links a.active { color: var(--white); }
.nav-links a.active::after { width: 100%; }

#scroll-progress {
  position: fixed;
  top: 0; left: 0;
  height: 3px;
  width: 0%;
  background: linear-gradient(90deg, #3f6593, #33547c);
  z-index: 1001;
  transition: width 0.1s linear;
}

.hamburger {
  display: none;
  flex-direction: column;
  gap: 7px;
  cursor: pointer;
  background: none;
  border: none;
  padding: 8px;
}
.hamburger span { display: block; width: 32px; height: 2px; background: var(--white); transition: all 0.3s var(--ease); }
.hamburger.active span:nth-child(1) { transform: translateY(9px) rotate(45deg); }
.hamburger.active span:nth-child(2) { opacity: 0; }
.hamburger.active span:nth-child(3) { transform: translateY(-9px) rotate(-45deg); }

/* ─── MOBILE NAV ───────────────────────────────────── */
.mobile-menu {
  display: none;
  position: fixed;
  inset: 0;
  background: var(--blue-deep);
  z-index: 999;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2.5rem;
}
.mobile-menu.open { display: flex; }
.mobile-menu a {
  font-family: var(--ff-head);
  font-size: clamp(1.7rem, 8.5vw, 2.4rem);
  color: var(--white);
  text-decoration: none;
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.45s var(--ease), transform 0.45s var(--ease);
}
.mobile-menu.open a { opacity: 0.7; transform: translateY(0); }
.mobile-menu.open a:hover { opacity: 1; }
.mobile-menu a:nth-child(2) { transition-delay: 0.05s; }
.mobile-menu a:nth-child(3) { transition-delay: 0.1s; }
.mobile-menu a:nth-child(4) { transition-delay: 0.15s; }
.mobile-menu a:nth-child(5) { transition-delay: 0.2s; }
.mobile-menu a:nth-child(6) { transition-delay: 0.25s; }
.mobile-menu a:nth-child(7) { transition-delay: 0.3s; }
.mobile-close { position: absolute; top: 1.5rem; right: 1.5rem; background: none; border: none; color: var(--white); font-size: 2rem; cursor: pointer; }

/* ─── FOOTER ───────────────────────────────────────── */
footer { background: var(--blue-deep); padding: 3rem 0; border-top: 1px solid rgba(255,255,255,0.1); }
.footer-inner { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 1.5rem; }
.footer-logo { font-family: var(--ff-head); font-size: 1.2rem; font-weight: 700; color: var(--white); }
.footer-copy { font-size: 0.72rem; color: rgba(255,255,255,0.3); }
.footer-socials { display: flex; gap: 1rem; }
.social-link {
  width: 36px; height: 36px;
  border: 1px solid rgba(143,163,190,0.2);
  display: flex; align-items: center; justify-content: center;
  color: var(--silver);
  text-decoration: none;
  font-size: 0.85rem;
  transition: all 0.3s;
}
.social-link:hover { border-color: var(--silver); color: var(--white); background: rgba(143,163,190,0.1); }
.footer-links { display: flex; gap: 2rem; }
.footer-links a { font-size: 0.7rem; letter-spacing: 0.1em; text-transform: uppercase; color: rgba(255,255,255,0.35); text-decoration: none; transition: color 0.3s; }
.footer-links a:hover { color: var(--silver-lt); }

/* ─── RESPONSIVE ───────────────────────────────────── */
@media (max-width: 1024px) {
  .container { padding: 0 1.5rem; }
}
@media (max-width: 768px) {
  html { font-size: 15px; }
  .container { padding: 0 1.25rem; }
  .nav-links, .lang-toggle { display: none; }
  .hamburger { display: flex; }
  #navbar { padding: 1rem 0; }
  #navbar.scrolled { padding: 0.75rem 0; }
  .nav-logo-img { height: 44px; }
  footer { padding: 2rem 0; }
  .footer-inner { flex-direction: column; align-items: flex-start; gap: 1.25rem; }
  .footer-links { flex-wrap: wrap; gap: 1rem; }
}