.site-header {
  position: fixed;
  inset-block-start: 0;
  inset-inline: 0;
  z-index: 1000;
  background-color: var(--encre-nuit);
  border-block-end: 1px solid var(--ardoise-fumee);
  height: var(--hauteur-header-mobile);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--espace-base);
  width: 100%;
  max-width: var(--largeur-contenu);
  margin-inline: auto;
  padding-inline: var(--gouttiere-mobile);
  height: 100%;
}

.site-header__brand {
  display: inline-flex;
  align-items: center;
  gap: var(--espace-serre);
  flex-shrink: 1;
  min-width: 0;
  border-bottom: none;
}

.site-header__brand:hover {
  border-bottom: none;
}

.site-header__logo {
  width: 32px;
  height: 32px;
  object-fit: contain;
  flex-shrink: 0;
}

.site-header__brand-text {
  font-family: var(--font-titres);
  font-size: 1rem;
  font-weight: 700;
  color: var(--ivoire-scene);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.site-header__toggle {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 10px;
  background: transparent;
  border: none;
  border-radius: var(--rayon-base);
  cursor: pointer;
  flex-shrink: 0;
}

.site-header__toggle-line {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--ivoire-scene);
  border-radius: 1px;
  transition: transform var(--transition-transformation), opacity var(--transition-couleur);
}

.site-header__toggle[aria-expanded="true"] .site-header__toggle-line:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.site-header__toggle[aria-expanded="true"] .site-header__toggle-line:nth-child(2) {
  opacity: 0;
}

.site-header__toggle[aria-expanded="true"] .site-header__toggle-line:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.site-header__toggle:focus-visible {
  outline: 2px solid var(--bordure-lumiere);
  outline-offset: 2px;
}

.site-header__nav {
  position: fixed;
  inset-block-start: var(--hauteur-header-mobile);
  inset-inline: 0;
  bottom: 0;
  background-color: var(--velours-profond);
  padding: var(--espace-confort) var(--gouttiere-mobile);
  overflow-y: auto;
  z-index: 999;
  transform: translateX(100%);
  transition: transform var(--transition-transformation);
  visibility: hidden;
}

.site-header__nav.is-open {
  transform: translateX(0);
  visibility: visible;
}

.site-header__nav-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--espace-base);
}

.site-header__nav-item {
  margin: 0;
  padding: 0;
}

.site-header__nav-link {
  display: block;
  padding: var(--espace-compact) var(--espace-base);
  font-family: var(--font-corps);
  font-size: var(--corps-size);
  font-weight: 500;
  color: var(--ivoire-scene);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  border-radius: var(--rayon-base);
  transition: background-color var(--transition-couleur), border-color var(--transition-couleur), color var(--transition-couleur);
}

.site-header__nav-link:hover {
  background-color: var(--ardoise-fumee);
  border-bottom-color: var(--ambre-projecteur);
}

.site-header__nav-link:focus-visible {
  outline: 2px solid var(--bordure-lumiere);
  outline-offset: 2px;
}

.site-header__cta {
  display: none;
  flex-shrink: 0;
  padding: var(--espace-compact) var(--espace-confort);
  font-size: var(--bouton-size);
  line-height: var(--bouton-line-height);
  font-weight: var(--bouton-weight);
  letter-spacing: var(--bouton-letter-spacing);
  text-align: center;
  border-radius: var(--rayon-base);
  background-color: var(--ambre-projecteur);
  color: var(--encre-nuit);
  border: 1px solid var(--ambre-projecteur);
  transition: background-color var(--transition-couleur), border-color var(--transition-couleur), transform var(--transition-transformation);
}

.site-header__cta:hover {
  background-color: var(--ambre-projecteur-hover);
  border-color: var(--ambre-projecteur-hover);
  transform: scale(1.02);
}

.site-header__cta:active {
  transform: scale(1);
}

.site-header__cta:focus-visible {
  outline: 2px solid var(--ivoire-scene);
  outline-offset: 2px;
}

@media (min-width: 1024px) {
  .site-header {
    height: var(--hauteur-header-desktop);
  }

  .site-header__inner {
    padding-inline: var(--gouttiere-desktop);
  }

  .site-header__logo {
    width: 40px;
    height: 40px;
  }

  .site-header__brand-text {
    font-size: 1.125rem;
  }

  .site-header__toggle {
    display: none;
  }

  .site-header__nav {
    position: static;
    transform: none;
    visibility: visible;
    background-color: transparent;
    padding: 0;
    overflow: visible;
    z-index: auto;
    flex: 1;
    display: flex;
    justify-content: center;
  }

  .site-header__nav-list {
    flex-direction: row;
    align-items: center;
    gap: var(--espace-confort);
  }

  .site-header__nav-link {
    padding: var(--espace-serre) var(--espace-compact);
    font-size: var(--corps-petit-size);
    line-height: var(--corps-petit-line-height);
    border-bottom: 2px solid transparent;
    border-radius: 0;
  }

  .site-header__nav-link:hover {
    background-color: transparent;
    border-bottom-color: var(--ambre-projecteur);
  }

  .site-header__cta {
    display: inline-block;
  }
}

@media (max-width: 1023px) {
  .site-header__nav {
    max-width: 400px;
    inset-inline-start: auto;
  }
}

@media (prefers-reduced-motion: reduce) {
  .site-header__nav {
    transition: none;
  }

  .site-header__toggle-line {
    transition: none;
  }
}