/* ========================================
   NAVIGATION
   ======================================== */

nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 200;
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 48px; height: 70px;
  background: rgba(255,255,255,.95);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  transition: box-shadow .3s;
}
nav.scrolled { box-shadow: 0 4px 32px rgba(0,0,0,.06); }

.nav-logo { display: flex; align-items: center; gap: 12px; }
.nav-logo-mark {
  width: 40px; height: 40px; border-radius: 10px;
  background: var(--rouge);
  display: flex; align-items: center; justify-content: center;
  font-family: 'Syne', sans-serif; font-weight: 800; font-size: 16px; color: #fff;
  letter-spacing: -0.5px; flex-shrink: 0;
}
.nav-logo-text strong {
  display: block; font-family: 'Syne', sans-serif; font-size: 16px;
  font-weight: 700; color: var(--texte); line-height: 1.1;
}
.nav-logo-text span {
  display: block; font-family: 'Space Mono', monospace;
  font-size: 8px; letter-spacing: 3px; text-transform: uppercase;
  color: var(--rouge); margin-top: 1px;
}

.nav-links { display: flex; gap: 32px; }
.nav-links a {
  font-size: 13px; font-weight: 500; color: var(--gris);
  transition: color .2s; position: relative;
}
.nav-links a::after {
  content: ''; position: absolute; bottom: -4px; left: 0; right: 0;
  height: 1.5px; background: var(--rouge); transform: scaleX(0);
  transform-origin: left; transition: transform .25s;
}
.nav-links a:hover { color: var(--texte); }
.nav-links a:hover::after { transform: scaleX(1); }

/* Active nav link (highlight when section in view) */
.nav-links a.active { color: var(--texte); }
.nav-links a.active::after { transform: scaleX(1); opacity: 1; }

.nav-cta {
  padding: 10px 22px; border-radius: 10px;
  background: linear-gradient(135deg,var(--rouge),var(--or-vif)); color: #fff;
  font-family: 'Space Mono', monospace; font-size: 9px;
  letter-spacing: 1.5px; text-transform: uppercase; font-weight: 700;
  transition: transform .18s, box-shadow .18s; border: 1.5px solid rgba(0,0,0,0.03);
  box-shadow: 0 6px 18px rgba(124,58,237,.2);
}
.nav-cta:hover { transform: translateY(-3px); box-shadow: 0 12px 32px rgba(124,58,237,.3); }

/* Hamburger (mobile) */
.nav-burger { display: none; flex-direction: column; gap: 5px; cursor: pointer; padding: 6px; }
.nav-burger span { display: block; width: 22px; height: 2px; background: var(--texte); border-radius: 2px; transition: all .3s; }
.nav-burger.open span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.nav-burger.open span:nth-child(2) { opacity: 0; }
.nav-burger.open span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* Mobile nav */
.nav-mobile {
  position: fixed; top: 70px; left: 0; right: 0; bottom: 0;
  background: var(--creme); z-index: 190; padding: 40px 24px;
  display: flex; flex-direction: column; gap: 24px;
  transform: translateX(-100%); transition: transform .35s ease;
}
.nav-mobile.open { transform: translateX(0); }
.nav-mobile a { font-size: 22px; font-family: 'Syne', sans-serif; font-weight: 700; color: var(--texte); }
.nav-mobile a:hover { color: var(--rouge); }

@media (max-width: 800px) {
  nav { padding: 0 20px; }
  .nav-links { display: none; }
  .nav-cta { display: none; }
  .nav-burger { display: flex; }
}