.app-header{z-index:20;background:var(--glass-bg);-webkit-backdrop-filter:var(--glass-blur);border-bottom:1px solid var(--glass-border);justify-content:space-between;align-items:flex-end;gap:24px;padding:18px clamp(24px,5vw,88px) 14px 28px;position:sticky;top:0}.app-header-brand{color:inherit;align-items:center;gap:12px;display:flex}.app-header-logo{font-family:var(--font-logo);font-variation-settings:var(--font-logo-variation);letter-spacing:.01em;color:var(--color-ink);font-size:19px;font-weight:900;line-height:1.1}.app-header-tagline{color:#a6a9ac;margin-top:2px;font-size:11px}.app-header-links{letter-spacing:var(--tracking-nav);white-space:nowrap;color:#4a4a4a;align-items:center;gap:clamp(24px,3.4vw,56px);padding-bottom:6px;font-size:12px;display:flex}.app-header-links a[aria-current=page]{color:var(--color-ink);text-underline-offset:6px;text-decoration:underline;text-decoration-thickness:1px}.app-header-links a:hover{color:var(--color-ink)}.app-header-brand:focus-visible,.app-header-links a:focus-visible{outline:2px solid var(--color-ink);outline-offset:3px}.app-header-menu-button{display:none}.app-header-nav{display:contents}@media (max-width:768px){.app-header{padding:calc(env(safe-area-inset-top,0px) + 4px) 6px 4px 16px;align-items:center;gap:12px}.app-header-logo{font-size:16px}.app-header-tagline{display:none}.app-header-menu-button{z-index:2;width:36px;height:36px;color:var(--color-ink);cursor:pointer;background:0 0;border:0;flex-direction:column;justify-content:center;align-items:center;gap:4px;padding:0;display:flex;position:relative}.app-header-menu-button span{width:20px;height:1.5px;transition:transform var(--duration-normal) var(--ease-out), opacity var(--duration-fast);background:currentColor;display:block}.app-header-menu-button.is-open span:first-child{transform:translateY(5.5px)rotate(45deg)}.app-header-menu-button.is-open span:nth-child(2){opacity:0}.app-header-menu-button.is-open span:nth-child(3){transform:translateY(-5.5px)rotate(-45deg)}.app-header-menu-button:focus-visible{outline:2px solid var(--color-ink);outline-offset:-2px}.app-header-links{z-index:1;background:var(--color-surface);border-bottom:1px solid var(--color-hairline-strong);opacity:0;visibility:hidden;transition:opacity var(--duration-normal) var(--ease-out), transform var(--duration-normal) var(--ease-out), visibility 0s linear var(--duration-normal);flex-direction:column;align-items:stretch;gap:0;padding:4px 16px 12px;font-size:13px;position:absolute;top:100%;left:0;right:0;transform:translateY(-6px);box-shadow:0 12px 24px #0000000f}.app-header-links.is-open{opacity:1;visibility:visible;transition:opacity var(--duration-normal) var(--ease-out), transform var(--duration-normal) var(--ease-out);transform:none}.app-header-links a{border-bottom:1px solid var(--color-hairline);padding:14px 0}.app-header-links a:last-child{border-bottom:0}.app-header-links a[aria-current=page]{text-underline-offset:5px}}@media (max-width:768px) and (prefers-reduced-motion:reduce){.app-header-links,.app-header-links.is-open,.app-header-menu-button span{transition:none}}