header {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 20;
  width: 100%;
  min-height: 126px;
  padding: 18px 34px;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  pointer-events: none;
}

.logo {
  width: 92px;
  height: 92px;
  display: block;
  pointer-events: auto;
  transition: transform 0.8s cubic-bezier(.16, 1, .3, 1);
}

.logo img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
}

header.is-scrolled {
  justify-content: flex-start;
}

header.is-scrolled .logo {
  transform: translateX(0);
}

nav {
  position: absolute;
  top: 34px;
  left: 50%;
  transform: translate(-50%, -18px);
  display: flex;
  justify-content: center;
  gap: clamp(12px, 3vw, 28px);
  pointer-events: auto;
  opacity: 0;
  transition: opacity 0.55s ease, transform 0.55s ease;
}

header.is-scrolled nav {
  opacity: 1;
  transform: translate(-50%, 0);
}

nav a {
  min-height: 50px;
  padding: 8px 22px 10px;
  border: 3px solid var(--noir);
  background: var(--blanc);
  color: var(--noir);
  font-family: var(--font-main);
  font-size: 28px;
  line-height: 1;
  text-decoration: none;
  box-shadow: 6px 6px 0 var(--noir);
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease, color 0.2s ease;
}

nav a:hover {
  background: var(--noir);
  color: var(--blanc);
  box-shadow: 9px 9px 0 var(--gris);
  transform: translate(-3px, -3px);
}

.nav-item {
  display: inline-flex;
  align-items: center;     /* centre vertical */
  justify-content: center; /* centre horizontal */

  padding: 8px 32px 12px;
  border: 3px solid var(--blanc);
  background: var(--blanc);
  color: var(--noir);

  font-family: var(--font-main);
  font-size: 36px;
  line-height: 1;

  cursor: pointer;
  text-decoration: none; /* 🔥 enlève le souligné */

  box-shadow: 9px 9px 0 rgba(255, 255, 255, 0.24);

  transition: transform 0.2s ease,
              box-shadow 0.2s ease,
              background 0.2s ease,
              color 0.2s ease;
}


.nav-item:hover {
   background: var(--noir);
  color: var(--blanc);
  box-shadow: 12px 12px 0 var(--blanc);
  transform: translate(-3px, -3px);
}
footer {
  padding: 28px 18px;
  background: var(--noir);
  color: var(--blanc);
  text-align: center;
  border-top: 1px solid rgba(255, 255, 255, 0.3);
}

footer p {
  font-size: 28px;
  line-height: 1;
}