.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-gold-wash);
}

.header-inner {
  max-width: 1160px;
  margin: 0 auto;
  padding: 12px 20px;
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.header-logo { flex-shrink: 0; }
.header-logo img { height: 40px; width: auto; display: block; }
.header-logo .header-logo__licht { display: none; }

/* Navigatie: mobiel een uitklapbaar paneel, vanaf 1024px een balk */
.header-nav {
  position: fixed;
  inset: 64px 0 auto 0;
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-gold-wash);
  padding: var(--space-md) 20px var(--space-lg);
  transform: translateY(-130%);
  transition: transform 0.35s ease;
  box-shadow: var(--shadow-md);
  max-height: calc(100vh - 64px);
  overflow-y: auto;
}
.header-nav.is-open { transform: none; }

.header-menu { list-style: none; padding: 0; margin: 0; }
.header-menu > li > a {
  display: block;
  padding: 12px 0;
  font-family: var(--font-heading);
  font-size: 17px;
  font-weight: 600;
  letter-spacing: -0.01em;
  text-decoration: none;
  color: var(--color-text);
}
.header-menu > li > a:hover,
.header-menu > li > a.is-active { color: var(--color-primary); }

/* Uitklapper bij Behandelingen */
.header-menu__item.has-sub { position: relative; }
.sub-toggle {
  position: absolute;
  top: 4px;
  right: 0;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: none;
  border: none;
  color: var(--color-primary);
  cursor: pointer;
}
.sub-toggle svg { width: 18px; height: 18px; transition: transform var(--transition); }
.sub-toggle[aria-expanded="true"] svg { transform: rotate(180deg); }

.header-sub {
  list-style: none;
  margin: 0 0 var(--space-sm);
  padding: 0 0 0 var(--space-md);
  border-left: 2px solid var(--color-gold-wash);
  display: none;
}
.header-sub.is-open { display: block; }
.header-sub a {
  display: block;
  padding: 9px 0;
  font-size: 15px;
  text-decoration: none;
  color: var(--color-text-muted);
}
.header-sub a:hover { color: var(--color-primary); }

/* Contactgegevens onder in het mobiele paneel */
.header-nav__foot {
  margin-top: var(--space-md);
  padding-top: var(--space-md);
  border-top: 1px solid var(--color-gold-wash);
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--space-sm);
}
.header-nav__foot a:not(.btn) {
  font-size: 15px;
  color: var(--color-primary);
  text-decoration: none;
}
.header-nav__foot .btn { margin-top: var(--space-sm); }

.header-cta { display: flex; align-items: center; gap: 10px; margin-left: auto; }

.hdr-bellen__btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  flex-shrink: 0;
  border-radius: var(--radius-btn);
  border: 1.5px solid var(--color-terracotta-soft);
  color: var(--color-primary);
  transition: background var(--transition), color var(--transition);
}
.hdr-bellen__btn:hover { background: var(--color-primary); color: var(--color-cream); }
.hdr-bellen__btn svg { width: 20px; height: 20px; }

.hamburger {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 10px;
  background: none;
  border: none;
  cursor: pointer;
}
.hamburger span {
  display: block;
  height: 2px;
  width: 100%;
  background: var(--color-dark);
  transition: transform var(--transition), opacity var(--transition);
}
.hamburger.is-open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.is-open span:nth-child(2) { opacity: 0; }
.hamburger.is-open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

@media (max-width: 1023px) {
  .header-cta .btn { display: none; }
}

@media (min-width: 1024px) {
  .hamburger { display: none; }
  .header-logo img { height: 46px; }

  .header-nav {
    position: static;
    transform: none;
    background: none;
    border: none;
    box-shadow: none;
    padding: 0;
    margin: 0 auto;
    overflow: visible;
    max-height: none;
  }
  .header-menu { display: flex; align-items: center; gap: 4px; }
  .header-menu > li > a {
    padding: 8px 14px;
    font-size: 15px;
    border-radius: var(--radius-btn);
  }
  .header-menu > li > a:hover { background: var(--color-bg-alt); }
  .header-menu > li > a.is-active { background: var(--color-bg-alt); color: var(--color-primary); }

  /* Behandelingen klapt op desktop uit bij hover en focus */
  .header-menu__item.has-sub > a { padding-right: 30px; }
  .sub-toggle {
    top: 50%;
    right: 8px;
    transform: translateY(-50%);
    width: 20px;
    height: 20px;
    pointer-events: none;
  }
  .sub-toggle svg { width: 14px; height: 14px; }
  .header-sub {
    display: block;
    position: absolute;
    top: calc(100% + 6px);
    left: 0;
    min-width: 232px;
    margin: 0;
    padding: var(--space-sm) 0;
    background: var(--color-bg);
    border: 1px solid var(--color-gold-wash);
    border-radius: var(--radius);
    box-shadow: var(--shadow-md);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-6px);
    transition: opacity var(--transition), transform var(--transition), visibility var(--transition);
  }
  .header-menu__item.has-sub:hover .header-sub,
  .header-menu__item.has-sub:focus-within .header-sub {
    opacity: 1;
    visibility: visible;
    transform: none;
  }
  .header-sub a { padding: 9px var(--space-md); }
  .header-sub a:hover { background: var(--color-bg-alt); color: var(--color-primary); }

  .header-nav__foot { display: none; }
}