.global-header { --nav-surface: #fafafc; --nav-text: #1d1d1f; --nav-muted: #626265; position: relative; z-index: 50; color: var(--nav-text); background: var(--nav-surface); }
.global-header *, .global-header *::before, .global-header *::after { box-sizing: border-box; }
.global-header button, .global-header summary { color: inherit; font: inherit; cursor: pointer; }
.global-header button { border: 0; background: none; }
.global-header a { color: inherit; }
.global-header a:hover, .global-header summary:hover { color: var(--nav-text); }
.global-header :focus-visible { outline: 2px solid #0071e3; outline-offset: 3px; }
.global-header [hidden] { display: none !important; }
.global-header ul { list-style: none; padding: 0; margin: 0; }
.global-nav-bar { max-width: 1024px; margin-inline: auto; padding-inline: 22px; display: flex; align-items: center; min-height: 44px; gap: 32px; font-size: 12px; }
.global-nav-brand { display: flex; align-items: center; justify-content: flex-start; min-width: 44px; height: 44px; flex-shrink: 0; }
.global-nav-brand img { display: block; width: 22px; height: 22px; border-radius: 5px; }
.global-nav-groups { display: flex; align-items: center; justify-content: space-evenly; flex: 1; gap: 32px; }
.global-nav-group { flex: 1; }
.global-nav-group summary { list-style: none; min-height: 44px; display: flex; align-items: center; justify-content: center; font-weight: 400; }
.global-nav-group summary::-webkit-details-marker { display: none; }
.global-nav-download { display: flex; align-items: center; min-height: 44px; white-space: nowrap; }
.global-nav-toggle, .global-nav-mobile-download { display: none; }
.global-nav-panel { padding: 40px 0 52px; background: var(--nav-surface); }
.global-nav-columns { max-width: 1024px; margin-inline: auto; padding-inline: 22px; display: grid; grid-template-columns: max-content minmax(0, 1fr); gap: 80px; }
.global-nav-panel h2 { color: var(--nav-muted); font-size: 12px; line-height: 1.4; font-weight: 400; margin: 0 0 16px; letter-spacing: 0; }
.global-nav-panel li + li { margin-top: 10px; }
.global-nav-panel a { display: inline-block; line-height: 1.3; }
.global-nav-primary a { font-size: 24px; font-weight: 600; letter-spacing: -.025em; }
.global-nav-secondary a { font-size: 14px; font-weight: 500; }
.global-nav-primary, .global-nav-secondary { min-width: 0; }
.global-header.is-enhanced .global-nav-panel { position: absolute; top: 44px; left: 0; width: 100%; z-index: 2; }
.global-nav-backdrop { position: fixed; inset: var(--nav-bottom, 44px) 0 0; background: rgba(0, 0, 0, .12); backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px); z-index: -1; }
.global-header:not(.is-enhanced) .global-nav-bar { flex-wrap: wrap; }
.global-header:not(.is-enhanced) .global-nav-groups { display: block; width: 100%; order: 3; flex-basis: 100%; }
.global-header:not(.is-enhanced) .global-nav-group summary { justify-content: flex-start; }
.global-header:not(.is-enhanced) .global-nav-columns { padding: 0; gap: 32px; }
.skip-link { z-index: 100; }
#features, #faq, #wwdc { scroll-margin-top: 24px; }
@media (prefers-color-scheme: dark) {
  .global-header { --nav-surface: #181818; --nav-text: #f5f5f7; --nav-muted: #a1a1a6; }
  .global-nav-backdrop { background: rgba(0, 0, 0, .35); }
}
@supports not (backdrop-filter: blur(1px)) {
  .global-nav-backdrop { background: rgba(0, 0, 0, .45); }
}
@media (max-width: 833px) {
  .global-nav-bar { min-height: 48px; gap: 12px; padding-left: max(22px, env(safe-area-inset-left)); padding-right: max(10px, env(safe-area-inset-right)); }
  .global-nav-brand { height: 48px; }
  .global-nav-download { min-height: 44px; margin-left: auto; }
  .global-header.is-enhanced .global-nav-toggle { position: relative; display: block; width: 44px; height: 48px; flex-shrink: 0; z-index: 5; }
  .global-nav-toggle span { position: absolute; left: 14px; width: 16px; height: 1px; background: currentColor; top: 20px; transition: transform 240ms, top 240ms; }
  .global-nav-toggle span + span { top: 27px; }
  .global-header.is-mobile-open .global-nav-toggle span { top: 24px; transform: rotate(45deg); }
  .global-header.is-mobile-open .global-nav-toggle span + span { transform: rotate(-45deg); }
  .global-header.is-enhanced .global-nav-groups { display: none; }
  .global-header.is-mobile-open { position: fixed; inset: 0; height: 100dvh; padding-top: env(safe-area-inset-top); }
  .global-header.is-mobile-open .global-nav-brand, .global-header.is-mobile-open .global-nav-download { visibility: hidden; }
  .global-header.is-mobile-open .global-nav-groups { display: block; position: absolute; inset: calc(48px + env(safe-area-inset-top)) 0 0; overflow-y: auto; overscroll-behavior: contain; padding: 8px max(48px, env(safe-area-inset-right)) max(48px, env(safe-area-inset-bottom)) max(48px, env(safe-area-inset-left)); }
  .global-header.is-mobile-open summary { justify-content: space-between; min-height: 52px; font-size: 28px; font-weight: 600; letter-spacing: -.025em; }
  .global-header.is-mobile-open summary::after { content: ''; width: 9px; height: 9px; border-top: 1.5px solid currentColor; border-right: 1.5px solid currentColor; transform: rotate(45deg); margin-right: 6px; }
  .global-header.is-mobile-open .global-nav-mobile-download { display: flex; align-items: center; min-height: 52px; font-size: 28px; font-weight: 600; letter-spacing: -.025em; }
  .global-header.is-mobile-open.is-sublevel .global-nav-group:not([open]), .global-header.is-mobile-open.is-sublevel summary, .global-header.is-mobile-open.is-sublevel .global-nav-mobile-download { display: none; }
  .global-header.is-mobile-open .global-nav-panel { position: static; padding: 8px 0 0; }
  .global-nav-columns { display: block; padding: 0; }
  .global-nav-primary a { font-size: 28px; }
  .global-nav-panel li + li { margin-top: 4px; }
  .global-nav-panel a { padding-block: 6px; min-height: 44px; }
  .global-nav-secondary { margin-top: 32px; }
  .global-nav-secondary a { font-size: 17px; }
  .global-nav-back { position: fixed; top: env(safe-area-inset-top); left: max(8px, env(safe-area-inset-left)); width: 44px; height: 48px; font-size: 32px !important; z-index: 5; }
  .global-header:not(.is-enhanced) .global-nav-groups { display: block; }
  .global-header:not(.is-enhanced) .global-nav-primary a { font-size: 24px; }
}
@media (prefers-reduced-motion: reduce) {
  .global-nav-toggle span { transition: none; }
}