.site-header { --header-height: 68px; position: sticky; top: 0; z-index: 50; border-bottom: 1px solid var(--border, #d9dddf); background: var(--bg, #f8f9f9); color: var(--text, #1f2021); font-family: "Avenir Next", Avenir, "Segoe UI", "Helvetica Neue", Arial, system-ui, sans-serif; }
.site-header .nav-shell { width: min(1320px, calc(100% - 48px)); min-height: var(--header-height); margin-inline: auto; display: grid; grid-template-columns: auto minmax(0, 1fr) auto; align-items: center; gap: 20px; }
.site-header .brand { display: inline-flex; align-items: center; gap: 9px; height: 44px; white-space: nowrap; color: inherit; text-decoration: none; }
.site-header .brand-mark { display: block; width: 28px; height: 28px; flex-shrink: 0; }
.site-header .brand-name { font-size: 21px; font-weight: 650; line-height: 1; letter-spacing: 0; }
.site-header .nav-links { display: flex; justify-content: center; align-items: center; gap: 20px; white-space: nowrap; }
.site-header .nav-links a { color: var(--text-soft, #5b6266); font-size: 14px; font-weight: 650; line-height: 1.6; text-decoration: none; }
.site-header .nav-links a:hover { color: var(--text, #1f2021); }
.site-header .nav-links [aria-current="page"] { color: var(--text, #1f2021); text-decoration: underline; text-underline-offset: 8px; }
.site-header .nav-links [aria-current="page"]::after { display: none; }
.site-header .nav-actions { display: flex; align-items: center; }
.site-header .nav-actions .button { box-sizing: border-box; display: inline-flex; align-items: center; justify-content: center; min-height: 40px; padding: 0 16px; border: 1px solid var(--accent, #202325); border-radius: 999px; color: var(--accent-ink, #f8f9f9); background: var(--accent, #202325); font-size: 14px; font-weight: 650; line-height: 1.6; text-decoration: none; white-space: nowrap; }
.site-header .nav-actions .button:hover { background: var(--accent-hover, #3a3f42); }
.site-header .menu-toggle, .site-header .nav-mobile-actions { display: none; }
.site-header a:focus-visible, .site-header button:focus-visible { outline: 2px solid var(--text, #1f2021); outline-offset: 4px; }
.site-header [hidden] { display: none !important; }
body.menu-open { overflow: hidden; }

@media (max-width: 1100px) {
  .site-header { --header-height: 62px; }
  .site-header .nav-shell { width: calc(100% - 32px); gap: 10px; }
  .site-header .brand-name { font-size: 20px; }
  .site-header .brand-mark { width: 26px; height: 26px; }
  .site-header .menu-toggle { box-sizing: border-box; display: inline-flex; flex-direction: column; align-items: center; justify-content: center; justify-self: end; grid-column: 3; grid-row: 1; width: 42px; height: 42px; gap: 6px; padding: 0; border: 1px solid var(--border, #d9dddf); border-radius: 50%; background: transparent; cursor: pointer; }
  .site-header .menu-toggle span { display: block; width: 17px; height: 1px; background: var(--text, #1f2021); }
  .site-header .menu-toggle[aria-expanded="true"] span:first-child { transform: translateY(3.5px) rotate(45deg); }
  .site-header .menu-toggle[aria-expanded="true"] span:last-child { transform: translateY(-3.5px) rotate(-45deg); }
  .site-header .nav-links { box-sizing: border-box; position: fixed; top: var(--header-height); left: 0; right: 0; display: grid; gap: 0; padding: 10px 16px 20px; max-height: calc(100dvh - var(--header-height)); overflow-y: auto; border-bottom: 1px solid var(--border, #d9dddf); background: var(--bg, #f8f9f9); visibility: hidden; opacity: 0; pointer-events: none; transform: translateY(-12px); }
  .site-header .nav-links.is-open { visibility: visible; opacity: 1; pointer-events: auto; transform: none; }
  .site-header .nav-links a { display: block; padding: 14px 4px; border-bottom: 1px solid var(--border, #d9dddf); font-size: 16px; }
  .site-header .nav-actions { display: none; }
  .site-header .nav-mobile-actions { display: block; padding-top: 12px; }
  .site-header .nav-mobile-actions a { text-align: center; border: 1px solid var(--border, #d9dddf); border-radius: 6px; background: var(--surface-raised, #fbfcfc); }
}