.site-header { position: relative; z-index: 10; border-bottom: 1px solid var(--color-border); background: rgba(11, 13, 16, 0.96);}.site-header__inner { min-height: var(--header-height); display: flex; align-items: center; justify-content: space-between;}.logo { display: inline-flex; align-items: center; gap: 9px; font-family: var(--font-display); font-weight: 700;}.logo__mark { color: var(--color-accent); font-size: 17px;}.logo__text { font-size: 17px; letter-spacing: -0.03em;}.logo__text span { color: var(--color-text-muted); font-weight: 500;}.site-nav { display: flex; align-items: center; gap: 32px;}.site-nav__link { color: var(--color-text-muted); font-size: 14px; transition: color 150ms ease;}.site-nav__link:hover { color: var(--color-text);}.menu-toggle { display: none; position: relative; width: 42px; height: 42px; padding: 10px; background: transparent; cursor: pointer; z-index: 11;}.menu-toggle span { display: block; position: absolute; left: 0; right: 0; height: 2px; border-radius: 2px; background: var(--color-text); transition: top 200ms ease, transform 200ms ease, opacity 200ms ease;}.menu-toggle span:nth-child(1) { top: 12px;}.menu-toggle span:nth-child(2) { top: 20px;}.menu-toggle span:nth-child(3) { top: 28px;}.menu-toggle.is-open span:nth-child(1) { top: 20px; transform: rotate(45deg);}.menu-toggle.is-open span:nth-child(2) { opacity: 0;}.menu-toggle.is-open span:nth-child(3) { top: 20px; transform: rotate(-45deg);}