.site-header {
  position: sticky;
  z-index: 100;
  top: 0;
  width: 100%;
  border-bottom: 1px solid color-mix(in srgb, var(--color-ligne-fumee) 72%, transparent);
  background: color-mix(in srgb, var(--color-fond-nocturne) 94%, transparent);
  backdrop-filter: blur(14px);
}

.site-header__inner {
  display: grid;
  min-height: 5rem;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
  align-items: center;
  gap: var(--space-4);
}

.site-header__brand {
  display: inline-flex;
  min-width: 0;
  align-items: center;
  justify-self: center;
  gap: 0.625rem;
  color: var(--color-blanc-froid);
  text-decoration: none;
  white-space: nowrap;
}

.site-header__brand:hover,
.site-header__brand:visited {
  color: var(--color-blanc-froid);
}

.site-header__logo {
  width: 2.625rem;
  height: 2.625rem;
  flex: 0 0 2.625rem;
  object-fit: contain;
}

.site-header__brand-name {
  font-family: var(--font-heading);
  font-size: 1.125rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1;
}

.site-header__desktop-nav {
  min-width: 0;
}

.site-header__desktop-nav--right {
  justify-self: end;
}

.site-header__desktop-nav ul,
.site-header__mobile-nav ul {
  display: flex;
  align-items: center;
  gap: clamp(0.75rem, 1.6vw, 1.5rem);
  margin: 0;
  padding: 0;
  list-style: none;
}

.site-header__desktop-nav li,
.site-header__mobile-nav li,
.site-header__desktop-nav li + li,
.site-header__mobile-nav li + li {
  margin: 0;
  padding: 0;
}

.site-header__desktop-nav--right ul {
  justify-content: flex-end;
}

.site-header__desktop-nav a {
  display: inline-flex;
  min-height: 2.75rem;
  align-items: center;
  color: var(--color-lavande-cendre);
  font-size: var(--text-small);
  font-weight: 600;
  line-height: 1;
  text-decoration: none;
  white-space: nowrap;
}

.site-header__desktop-nav a:hover {
  color: var(--color-blanc-froid);
}

.site-header__desktop-nav .site-header__action {
  padding: 0.625rem 0.8rem;
  border: 1px solid var(--color-violet-profond);
  border-radius: var(--radius-small);
  color: var(--color-blanc-froid);
}

.site-header__desktop-nav .site-header__action:hover {
  border-color: var(--color-violet-sorcier);
  background: var(--color-prune-surface);
  color: var(--color-blanc-froid);
}

.site-header__toggle,
.site-header__mobile-nav {
  display: none;
}

@media (max-width: 63rem) {
  .site-header__inner {
    min-height: 4.5rem;
    grid-template-columns: 1fr auto 1fr;
  }

  .site-header__desktop-nav {
    display: none;
  }

  .site-header__toggle {
    display: inline-flex;
    width: 2.75rem;
    height: 2.75rem;
    justify-self: end;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    gap: 0.3rem;
    padding: 0;
    border: 1px solid var(--color-ligne-fumee);
    border-radius: var(--radius-small);
    background: var(--color-prune-panneau);
    color: var(--color-blanc-froid);
    transition: border-color var(--transition-fast), background-color var(--transition-fast);
  }

  .site-header__toggle:hover,
  .site-header__toggle[aria-expanded="true"] {
    border-color: var(--color-violet-sorcier);
    background: var(--color-prune-surface);
  }

  .site-header__toggle-line {
    width: 1.125rem;
    height: 1px;
    background: currentColor;
    transition: transform var(--transition-fast), opacity var(--transition-fast);
  }

  .site-header__toggle[aria-expanded="true"] .site-header__toggle-line:nth-child(1) {
    transform: translateY(0.35rem) 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(-0.35rem) rotate(-45deg);
  }

  .site-header__mobile-nav {
    position: absolute;
    top: 100%;
    right: 0;
    left: 0;
    max-height: calc(100vh - 4.5rem);
    overflow-y: auto;
    border-bottom: 1px solid var(--color-ligne-fumee);
    background: var(--color-fond-nocturne);
    box-shadow: var(--shadow-elevated);
  }

  .site-header__mobile-nav:not([hidden]) {
    display: block;
  }

  .site-header__mobile-nav-inner {
    width: min(100%, 34rem);
    margin-inline: auto;
    padding: var(--space-5) var(--container-padding) var(--space-6);
  }

  .site-header__mobile-nav ul {
    align-items: stretch;
    flex-direction: column;
    gap: var(--space-2);
  }

  .site-header__mobile-nav a {
    display: flex;
    min-height: 2.75rem;
    align-items: center;
    padding: 0.625rem 0;
    border-bottom: 1px solid color-mix(in srgb, var(--color-ligne-fumee) 55%, transparent);
    color: var(--color-blanc-froid);
    font-size: var(--text-small);
    font-weight: 600;
    text-decoration: none;
  }

  .site-header__mobile-nav .site-header__mobile-action {
    justify-content: center;
    margin-top: var(--space-3);
    padding-inline: var(--space-4);
    border: 1px solid var(--color-violet-sorcier);
    border-radius: var(--radius-small);
    background: var(--color-violet-sorcier);
    color: var(--color-fond-encre);
  }
}

@media (max-width: 30rem) {
  .site-header__inner {
    gap: var(--space-2);
  }

  .site-header__logo {
    width: 2.125rem;
    height: 2.125rem;
    flex-basis: 2.125rem;
  }

  .site-header__brand-name {
    font-size: 0.9375rem;
  }
}

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