.site-header {
  position: relative;
  z-index: 100;
  min-height: 5.25rem;
  border-bottom: 1px solid var(--color-border-subtle);
  background: var(--color-panel-solid);
}

@supports ((-webkit-backdrop-filter: blur(18px)) or (backdrop-filter: blur(18px))) {
  .site-header { background: rgba(19, 21, 30, 0.78); -webkit-backdrop-filter: blur(18px); backdrop-filter: blur(18px); }
}

.site-header__inner { display: grid; grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr); min-height: 5.25rem; align-items: center; gap: var(--space-4); }
.site-header__brand { display: inline-flex; align-items: center; justify-self: center; gap: var(--space-2); min-width: 0; color: var(--color-text-primary); font-family: var(--font-heading); font-size: 1.125rem; font-weight: 700; letter-spacing: -0.035em; line-height: 1; text-decoration: none; white-space: nowrap; }
.site-header__mark { width: 2.25rem; height: 2.25rem; flex: 0 0 2.25rem; object-fit: contain; }
.site-header__brand-text { overflow: hidden; text-overflow: ellipsis; }
.site-header__desktop-nav { min-width: 0; }
.site-header__desktop-nav--left { justify-self: start; }
.site-header__desktop-nav--right { justify-self: end; }
.site-header__desktop-nav ul { display: flex; align-items: center; gap: clamp(0.75rem, 1.5vw, 1.5rem); margin: 0; padding: 0; list-style: none; }
.site-header__desktop-nav li,
.site-header__desktop-nav li + li { display: flex; margin: 0; padding: 0; }
.site-header__desktop-nav a { display: inline-flex; min-height: 2.75rem; align-items: center; border-bottom: 2px solid transparent; color: var(--color-text-secondary); font-size: 0.8125rem; font-weight: 600; letter-spacing: 0.04em; line-height: 1.2; text-decoration: none; white-space: nowrap; transition: border-color var(--transition-fast), color var(--transition-fast); }
.site-header__desktop-nav a:hover,
.site-header__desktop-nav a[aria-current="page"] { border-color: var(--color-violet-accent); color: var(--color-text-primary); }
.site-header__contact-link { color: var(--color-violet-bright) !important; }
.site-header__toggle { display: none; width: 2.75rem; height: 2.75rem; align-items: center; justify-content: center; justify-self: end; gap: 0.28rem; padding: 0.625rem; border: 1px solid var(--color-border-subtle); border-radius: var(--radius-md); background: var(--color-panel-solid); color: var(--color-text-primary); }
.site-header__toggle span { display: block; width: 1.25rem; height: 2px; border-radius: 1px; background: currentColor; transition: transform var(--transition-fast), opacity var(--transition-fast); }
.site-header__toggle.is-open span:nth-child(1) { transform: translateY(0.47rem) rotate(45deg); }
.site-header__toggle.is-open span:nth-child(2) { opacity: 0; }
.site-header__toggle.is-open span:nth-child(3) { transform: translateY(-0.47rem) rotate(-45deg); }
.site-header__mobile-nav { position: absolute; z-index: 100; top: calc(100% + 1px); right: 0; left: 0; max-height: calc(100vh - 5.25rem); overflow-y: auto; border-bottom: 1px solid var(--color-border-subtle); background: var(--color-panel-solid); box-shadow: var(--shadow-overlay); }
.site-header__mobile-nav[hidden] { display: none !important; }
.site-header__mobile-nav-inner { width: min(100% - (var(--container-gutter) * 2), var(--container-max)); margin-inline: auto; padding-block: var(--space-6) var(--space-8); }
.site-header__mobile-brand { display: inline-flex; align-items: center; gap: var(--space-2); margin-bottom: var(--space-6); color: var(--color-text-primary); font-family: var(--font-heading); font-weight: 700; text-decoration: none; }
.site-header__mobile-brand img { width: 1.875rem; height: 1.875rem; object-fit: contain; }
.site-header__mobile-nav ul { display: grid; gap: 0; margin: 0; padding: 0; border-top: 1px solid var(--color-border-subtle); list-style: none; }
.site-header__mobile-nav li,
.site-header__mobile-nav li + li { margin: 0; padding: 0; border-bottom: 1px solid var(--color-border-subtle); }
.site-header__mobile-nav a:not(.site-header__mobile-brand) { display: flex; min-height: 2.75rem; align-items: center; padding-block: var(--space-2); color: var(--color-text-primary); font-weight: 600; text-decoration: none; }

@media (max-width: 62rem) {
  .site-header__inner { grid-template-columns: 1fr auto 1fr; }
  .site-header__desktop-nav { display: none; }
  .site-header__toggle { display: inline-flex; }
}

@media (max-width: 30rem) {
  .site-header,
  .site-header__inner { min-height: 4.5rem; }
  .site-header__mark { width: 1.875rem; height: 1.875rem; flex-basis: 1.875rem; }
  .site-header__brand { font-size: 1rem; }
  .site-header__mobile-nav { max-height: calc(100vh - 4.5rem); }
}

html.site-mobile-menu-open { overflow: hidden; }