.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: var(--color-metal);
  color: var(--color-paper);
}

/* Léger grain métal brossé, très discret */
.site-header::before {
  content: "";
  position: absolute;
  inset: 0;
  background: url("../../img/textures/metal046b.jpg") repeat;
  background-size: 220px 220px;
  opacity: 0.14;
  mix-blend-mode: screen;
  pointer-events: none;
}

.site-header .container {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 0.75rem;
  padding-bottom: 0.75rem;
}

.site-logo {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  color: var(--color-paper);
  text-decoration: none;
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 1.25rem;
}

.site-logo img {
  height: 50px;
  width: auto;
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--color-paper);
  font-size: 1.75rem;
  cursor: pointer;
}

.main-nav ul {
  display: flex;
  gap: 1.75rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.main-nav a {
  color: var(--color-paper);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
  letter-spacing: 0.02em;
  padding-bottom: 4px;
  border-bottom: 2px solid transparent;
  transition: border-color 0.2s, color 0.2s;
}

.main-nav a:hover,
.main-nav a[aria-current="page"] {
  color: var(--color-wood);
  border-color: var(--color-wood);
}

@media (max-width: 720px) {
  .nav-toggle {
    display: block;
  }
  .main-nav {
    display: none;
    width: 100%;
  }
  .main-nav.is-open {
    display: block;
  }
  .site-header .container {
    flex-wrap: wrap;
  }
  .main-nav ul {
    flex-direction: column;
    gap: 0;
    padding-bottom: 1rem;
  }
  .main-nav a {
    display: block;
    padding: 0.75rem 0;
    border-bottom: 1px solid rgba(241, 230, 210, 0.15);
  }
}