:root{
  --color-accent: #111;      /* tu peux surcharger ailleurs */
  --header-height: 64px;
  --drawer-width: 75vw;      /* 75% de la largeur de l'écran (tablette/mobile) */
}

/* Base & utilities */
[hidden]{ display:none !important; }

#mainHeader{
  position: fixed;         /* <— fixed instead of sticky */
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  backdrop-filter: saturate(50%) blur(3px);
  -webkit-backdrop-filter: saturate(50%) blur(3px);
  transition: transform .2s ease;
  background: rgba(255,255,255,0.1);
  color: var(--color-accent);
}
.header-row{
  display: flex; align-items: center; justify-content: space-between;
  padding: 1rem 2rem; min-height: var(--header-height);
}
.brand{
  display: inline-flex; align-items: center; gap: 12px; text-decoration: none; color: inherit;
}
#brandLogo{
  display: block; height: 60px !important; width: auto; transition: transform .2s ease;
}
.site-title{
  font-weight: 700; text-transform: uppercase; transition: transform .2s ease;
}

/* Nav (desktop) */
.nav-links a{
  margin-left: 1rem; text-decoration: none; color: var(--color-accent);
}

/* Burger Button */
.burger {
  display: none;
  width: 40px;
  height: 40px;
  background: none;
  border: 0;
  cursor: pointer;
  color: var(--color-accent);
}
.burger,
.burger:hover,
.burger:focus,
.burger:active {
  background: none;
  color: inherit;
  opacity: 1;
  transform: none;
  outline: none;
}

.burger-icon {
  display: block;
  width: 28px;
  height: 28px;
  pointer-events: none;
  transition: transform .2s ease, opacity .2s ease;
}

/* Animate icon on open (rotate into X if you want) */
.burger.is-active .burger-icon {
  transform: rotate(90deg);
  opacity: 0.6;
}

@media (max-width: 950px) {
  .burger { display: inline-flex; align-items: center; justify-content: center; }
}

/* Backdrop + Drawer */
.backdrop{
  position: fixed; inset: 0; background: rgba(0,0,0,.5);
  opacity: 0; pointer-events: none; transition: opacity .25s ease; z-index: 999;
}

.drawer{
  position: fixed; top: 0; right: 0; height: 100vh; width: var(--drawer-width);
  background: #fff; transform: translateX(100%); transition: transform .3s ease;
  z-index: 1000; padding: 5rem 1.25rem 1.5rem;
  box-shadow: -24px 0 48px rgba(0,0,0,.18), -6px 0 16px rgba(0,0,0,.12);
  overflow-y: auto;
}
.close-btn{ position: absolute; top: 16px; right: 16px; border: 0; background: none; cursor: pointer; color: var(--color-accent); }
.close-btn:hover,
.close-btn:focus,
.close-btn:active {
  color: var(--color-accent);
  opacity: 1;
  transform: none;
  background: none;
  outline: none;
}
.drawer-menu a{ display: block; padding: .75rem 0; text-decoration: none; color: var(--color-accent); }

/* Open states */
body.menu-open .backdrop{ opacity: 1; pointer-events: auto; }
body.menu-open .drawer{ transform: translateX(0); }
body.menu-open{ overflow: hidden; }

/* Compact header scale */
#mainHeader.scrolled #brandLogo{ transform: scale(0.9); }
#mainHeader.scrolled .site-title{ transform: scale(0.95); }

/* Hide header on scroll down (desktop) */
#mainHeader.is-hidden{ transform: translateY(-100%); }

/* Responsive */
@media (max-width: 1250px){
    .site-title{
        display: none;
    }
}
@media (max-width: 950px){
  .nav-links{ display: none; }
  .burger{ display: inline-block; }
  #brandLogo{ height: 32px!important; }
  .header-row{ padding: 0 1rem };
}