.site-header {
  position: sticky; top: 0; z-index: 1000;
  background: color-mix(in oklab, var(--color-bg) 96%, transparent);
  backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--color-divider);
  transition: box-shadow var(--transition-interactive);
}
.site-header--scrolled { box-shadow: var(--shadow-sm); }

.nav-toggle-input { display: none; }

/* ── DESKTOP ── */
.nav-inner {
  display: flex; flex-direction: column;
  align-items: center;
  padding-block: var(--space-3) var(--space-2);
  gap: var(--space-2);
}
.nav-logo { display: flex; align-items: center; justify-content: center; text-decoration: none; }
.nav-logo-img { height: 32px; width: auto; display: block; }
.nav-logo-text { display: none; }
.nav-burger { display: none; }
.nav-overlay { display: none; }

.nav-row {
  display: flex; align-items: center;
  justify-content: center; gap: var(--space-3); width: 100%;
}
.nav-menu { display: flex; align-items: center; gap: 0; list-style: none; margin: 0; padding: 0; }

.nav-rdv-btn {
  display: inline-flex; align-items: center; flex-shrink: 0;
  padding: 0.28rem 0.9rem;
  font-family: var(--font-body); font-size: 0.68rem; font-weight: 500;
  letter-spacing: 0.09em; text-transform: uppercase;
  color: var(--color-primary); border: 1px solid var(--color-primary);
  border-radius: var(--radius-full); text-decoration: none; white-space: nowrap;
  transition: background var(--transition-interactive), color var(--transition-interactive);
}
.nav-rdv-btn:hover { background: var(--color-primary); color: #fff; }

.nav-item { position: relative; }
.nav-link {
  display: block; padding: var(--space-1) var(--space-2);
  font-size: 0.76rem; font-weight: 500; letter-spacing: 0.04em;
  color: var(--color-text-muted); border-radius: var(--radius-md);
  white-space: nowrap; cursor: pointer;
  background: none; border: none; font-family: inherit;
  transition: color var(--transition-interactive);
}
.nav-link:hover, .nav-link--active { color: var(--color-primary); }
.nav-chevron { font-size: 0.55em; margin-left: 2px; opacity: 0.45; transition: transform 250ms ease; }
.nav-item--has-dropdown.open .nav-chevron { transform: rotate(180deg); }

/* Dropdown desktop */
.nav-item--has-dropdown:hover .nav-dropdown,
.nav-item--has-dropdown:focus-within .nav-dropdown,
.nav-item--has-dropdown.open .nav-dropdown {
  opacity: 1; transform: translateX(-50%) translateY(0);
  pointer-events: auto; visibility: visible;
}
.nav-dropdown {
  position: absolute; top: calc(100% + 8px); left: 50%;
  transform: translateX(-50%) translateY(-6px);
  min-width: 190px; background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card); box-shadow: var(--shadow-md);
  padding: var(--space-2); list-style: none;
  opacity: 0; visibility: hidden; pointer-events: none;
  transition: opacity 200ms ease, transform 200ms ease, visibility 200ms ease;
  z-index: 200;
}
.nav-item--has-dropdown::after {
  content: ''; position: absolute; top: 100%; left: 0; right: 0; height: 12px;
}
.nav-dropdown-item a, .nav-dropdown-link {
  display: block; padding: var(--space-2) var(--space-4);
  font-size: 0.76rem; color: var(--color-text-muted);
  border-radius: var(--radius-md); white-space: nowrap; text-decoration: none;
  transition: color var(--transition-interactive), background var(--transition-interactive);
}
.nav-dropdown-item a:hover, .nav-dropdown-link:hover,
.nav-dropdown-link--active { color: var(--color-primary); background: var(--color-primary-highlight); }

/* ── MOBILE — overlay plein écran blanc ── */
@media (max-width: 1100px) {

  /* Reset couleurs complet sur le menu mobile — neutralise tout héritage */
  .nav-toggle-input:checked ~ .nav-row,
  .nav-toggle-input:checked ~ .nav-row * {
    color: #3d3a39;
  }
  .nav-toggle-input:checked ~ .nav-row a,
  .nav-toggle-input:checked ~ .nav-row button {
    color: #3d3a39;
  }


  .nav-inner {
    flex-direction: row; justify-content: space-between;
    align-items: center; padding-block: 0; height: 64px;
  }
  .nav-logo-img { height: 30px; }
  .nav-row { display: none; }
  .nav-rdv-btn { display: none; }

  /* Burger */
  .nav-burger {
    display: flex; flex-direction: column; gap: 5px;
    width: 40px; height: 40px;
    align-items: center; justify-content: center;
    cursor: pointer; flex-shrink: 0; z-index: 1002;
    background: none; border: none;
  }
  .nav-burger span {
    display: block; width: 22px; height: 1.5px;
    background: var(--color-text);
    transition: transform 250ms ease, opacity 250ms ease;
  }
  .nav-toggle-input:checked ~ .nav-burger span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
  .nav-toggle-input:checked ~ .nav-burger span:nth-child(2) { opacity: 0; }
  .nav-toggle-input:checked ~ .nav-burger span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

  /* Overlay plein écran — s'ouvre vers le bas depuis le header */
  .nav-row {
    display: flex !important;
    flex-direction: column;
    align-items: stretch;
    position: fixed;
    top: 64px; left: 0; right: 0;
    height: calc(100vh - 64px);
    background: #fff;
    z-index: 1001;
    overflow-y: auto;
    padding: var(--space-6) var(--space-6) var(--space-10);
    gap: 0;
    justify-content: flex-start;
    transform: translateY(-110%);
    opacity: 0;
    transition: transform 350ms cubic-bezier(0.16,1,0.3,1), opacity 250ms ease;
    pointer-events: none;
  }

  .nav-toggle-input:checked ~ .nav-row {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  /* Menu vertical */
  .nav-menu {
    flex-direction: column; align-items: stretch;
    width: 100%; gap: 0;
  }

  .nav-item { width: 100%; border-bottom: 1px solid var(--color-border); }
  .nav-item:first-child { border-top: 1px solid var(--color-border); }

  .nav-link {
    font-family: var(--font-display);
    font-size: 1.6rem; font-weight: 300;
    color: var(--color-text);
    padding: var(--space-5) var(--space-2);
    width: 100%; text-align: left;
    display: flex; align-items: center; justify-content: space-between;
    border-radius: 0; letter-spacing: 0;
  }
  .nav-link:hover, .nav-link--active { color: var(--color-primary); background: transparent; }

  /* Sous-menus accordéon */
  .nav-dropdown {
    position: static; transform: none;
    opacity: 0; visibility: hidden; pointer-events: none;
    max-height: 0; overflow: hidden;
    box-shadow: none; border: none; border-radius: 0;
    background: #fff;
    padding: 0; width: 100%;
    transition: max-height 350ms ease, opacity 300ms ease;
  }
  .nav-item--has-dropdown.open .nav-dropdown {
    opacity: 1; visibility: visible; pointer-events: auto;
    max-height: 400px;
    padding: 8px 0;
  }

  .nav-dropdown-item { width: 100%; border-bottom: 1px solid #f0f0f0; }
  .nav-dropdown-item:last-child { border-bottom: none; }

  .nav-toggle-input:checked ~ .nav-row .nav-dropdown-item a,
  .nav-toggle-input:checked ~ .nav-row .nav-dropdown-link {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 11px 16px;
    font-family: sans-serif;
    font-size: 14px;
    font-weight: 400;
    letter-spacing: 0;
    text-transform: none;
    color: #3d3a39;
    text-decoration: none;
    background: #ffffff;
    border-radius: 0;
    white-space: nowrap;
  }
  .nav-toggle-input:checked ~ .nav-row .nav-dropdown-item a::before,
  .nav-toggle-input:checked ~ .nav-row .nav-dropdown-link::before {
    content: '';
    display: inline-block;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: #2aabaa;
    flex-shrink: 0;
    margin-left: 12px;
  }
  .nav-toggle-input:checked ~ .nav-row .nav-dropdown-item a::after,
  .nav-toggle-input:checked ~ .nav-row .nav-dropdown-link::after {
    content: '›';
    margin-left: auto;
    color: #aaa;
    font-size: 18px;
    font-weight: 300;
  }
  .nav-toggle-input:checked ~ .nav-row .nav-dropdown-link:hover,
  .nav-toggle-input:checked ~ .nav-row .nav-dropdown-item a:hover {
    color: #2aabaa;
    background: #f0fafa;
  }

  /* Bouton RDV en bas */
  .nav-rdv-btn {
    display: inline-flex;
    align-self: flex-start;
    margin-top: var(--space-8);
    font-size: 0.72rem;
    padding: 0.5rem 1.4rem;
  }
}

@media (min-width: 1101px) {
  .nav-burger { display: none; }
}

/* ── Sous-menus mobile — fix global ── */
@media (max-width: 1100px) {
  .nav-toggle-input:checked ~ .nav-row .nav-dropdown {
    display: block !important; position: static !important;
    transform: none !important; opacity: 1 !important;
    visibility: visible !important; pointer-events: auto !important;
    max-height: none !important; overflow: visible !important;
    background: transparent !important; box-shadow: none !important;
    border: none !important; padding: 0 0 8px 0 !important;
  }
  .nav-toggle-input:checked ~ .nav-row .nav-dropdown-item a,
  .nav-toggle-input:checked ~ .nav-row .nav-dropdown-link {
    display: block !important; padding: 6px 16px 6px 28px !important;
    font-size: 13px !important; font-weight: 400 !important;
    color: #555352 !important; text-decoration: none !important;
    background: transparent !important;
  }
  .nav-toggle-input:checked ~ .nav-row .nav-chevron { display: none !important; }
  .nav-toggle-input:checked ~ .nav-row .nav-dropdown-item a::before,
  .nav-toggle-input:checked ~ .nav-row .nav-dropdown-link::before,
  .nav-toggle-input:checked ~ .nav-row .nav-dropdown-item a::after,
  .nav-toggle-input:checked ~ .nav-row .nav-dropdown-link::after { display: none !important; }
}