.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: var(--z-nav);
  opacity: 1;
  transform: translateY(0);
  transition: opacity var(--t-slow), transform var(--t-slow);
}

.site-header.is-hero-hidden {
  opacity: 0;
  pointer-events: none;
  transform: translateY(calc(-100% - 18px));
}

.navbar {
  width: min(var(--container), calc(100% - 32px));
  height: 76px;
  margin: 16px auto 0;
  padding: 0 18px;
  display: flex;
  align-items: center;
  gap: 24px;
  color: var(--c-white);
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 8px;
  background: #251a20;
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
  transition:
    background var(--t-slow),
    box-shadow  var(--t-slow),
    color       var(--t-slow),
    border-color var(--t-slow);
}

.navbar-brand {
  margin-right: auto;
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.brand-symbol {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  border-radius: var(--r-full);
  color: var(--c-white);
  font-family: var(--f-primary);
  font-weight: 800;
  font-size: 1.3rem;
  background: var(--g-primary);
  box-shadow: none;
  transition: transform var(--t-slow), box-shadow var(--t-slow);
  flex-shrink: 0;
}

.navbar-brand:hover .brand-symbol {
  transform: rotate(-4deg);
  box-shadow: none;
}

.brand-text strong,
.brand-text small {
  display: block;
  line-height: 1.12;
}

.brand-text strong {
  font-weight: 800;
}

.brand-text small {
  opacity: 0.68;
  font-size: 0.78rem;
}

.navbar-links {
  display: flex;
  align-items: center;
  gap: clamp(14px, 2vw, 30px);
}

.navbar-link {
  position: relative;
  font-weight: 700;
  font-size: 0.92rem;
  opacity: 0.82;
  transition: opacity var(--t-slow), color var(--t-slow);
}

.navbar-link::after {
  content: '';
  position: absolute;
  left: 50%;
  bottom: -8px;
  width: 100%;
  height: 2px;
  border-radius: var(--r-full);
  background: var(--c-accent);
  opacity: 0;
  transform: translateX(-50%) scaleX(0);
  transform-origin: center;
  transition: transform var(--t-slow), opacity var(--t-slow);
}

.navbar-link:hover {
  opacity: 1;
}

.navbar-link:hover::after {
  opacity: 1;
  transform: translateX(-50%) scaleX(1);
}

.navbar-cta {
  min-height: 46px;
  display: inline-flex;
  align-items: center;
  padding: 0 22px;
  border-radius: var(--r-full);
  font-weight: 800;
  color: var(--c-white);
  background: var(--c-primary);
  box-shadow: none;
  transition: transform var(--t-slow), box-shadow var(--t-slow), background var(--t-slow);
  white-space: nowrap;
}

.navbar-cta:hover {
  transform: translateY(-1px);
  color: var(--c-white);
  background: var(--c-primary-light);
  box-shadow: none;
}

.navbar-burger {
  display: none;
  width: 44px;
  height: 44px;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  border-radius: var(--r-md);
  background: var(--c-white);
  transition: background var(--t-base), transform var(--t-base);
}

.navbar-burger:hover {
  background: rgba(255, 255, 255, 0.88);
  transform: scale(1.06);
}

.burger-line {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--c-primary);
  border-radius: var(--r-full);
  transform-origin: center;
  transition: transform var(--t-slow), opacity var(--t-slow);
}

.navbar-burger.open .burger-line:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.navbar-burger.open .burger-line:nth-child(2) {
  opacity: 0;
}

.navbar-burger.open .burger-line:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.navbar-mobile {
  position: fixed;
  left: 16px;
  right: 16px;
  top: 104px;
  display: grid;
  justify-items: center;
  gap: 8px;
  padding: 18px;
  color: var(--c-dark);
  border: 1px solid rgba(111, 45, 98, 0.14);
  border-radius: 8px;
  background: #fffaf4;
  box-shadow: none;
  opacity: 0;
  pointer-events: none;
  transform: translateY(-12px);
  transition: opacity var(--t-slow), transform var(--t-slow);
  z-index: calc(var(--z-nav) - 1);
}

.navbar-mobile.open {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

.navbar-mobile .navbar-link {
  width: 100%;
  padding: 12px;
  text-align: center;
  opacity: 1;
  color: var(--c-dark);
}

.navbar-mobile .navbar-link::after {
  display: none;
}

.navbar-mobile .navbar-cta {
  width: min(260px, 100%);
  justify-content: center;
  text-align: center;
}

/* Copyright RZU Informatique */