.site-nav{align-items:center;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);background:color-mix(in oklab,var(--surface) 92%,var(--bg) 8%);border:1px solid var(--border);border-radius:999px;bottom:calc(1.2rem + env(safe-area-inset-bottom,0px));box-shadow:0 12px 28px var(--shadow);font-size:.9rem;font-weight:500;gap:.5rem;justify-content:center;left:50%;max-width:calc(100vw - 2.5rem);opacity:0;padding:.6rem;pointer-events:none;position:fixed;transform:translate(-50%,.5rem);transition:opacity .35s ease,transform .35s ease;width:-moz-fit-content;width:fit-content;z-index:90}.site-nav,.site-nav-desktop{display:flex}.site-nav.is-always-visible,body.nav-visible .site-nav{opacity:1;pointer-events:auto;transform:translate(-50%)}.site-nav .nav-pill{align-items:center;background:var(--surface-soft);border:1px solid var(--border);border-radius:999px;color:var(--text);display:inline-flex;font-weight:700;justify-content:center;min-height:2.4rem;padding:.45rem .95rem;position:relative;text-decoration:none;transition:background-color .28s ease,color .28s ease,border-color .28s ease,transform .2s ease;white-space:nowrap}.site-nav .nav-pill:hover{background:color-mix(in oklab,var(--surface-soft) 86%,var(--accent) 14%);text-decoration:none}.site-nav .nav-pill.is-active{background:color-mix(in oklab,var(--surface-soft) 74%,var(--accent) 26%)}.site-nav .sections-dropdown{position:relative}.site-nav .sections-dropdown-trigger{gap:.4rem}.site-nav .sections-dropdown-chevron{height:.95rem;transition:transform .2s ease;width:.95rem}.site-nav .sections-dropdown-chevron.is-open{transform:rotate(180deg)}.site-nav .sections-dropdown-menu{background:color-mix(in oklab,var(--surface) 92%,var(--bg) 8%);border:1px solid var(--border);border-radius:.9rem;bottom:calc(100% + .5rem);box-shadow:0 10px 24px var(--shadow);display:grid;gap:.35rem;min-width:12rem;padding:.45rem;position:absolute;right:0;z-index:210}.site-nav .sections-dropdown-item{background:var(--surface-soft);border:1px solid var(--border);border-radius:999px;color:var(--text);display:block;font-size:.85rem;font-weight:700;padding:.42rem .75rem;text-decoration:none}.site-nav .nav-active-fish{height:1.5rem;left:0;opacity:0;pointer-events:none;position:absolute;top:0;width:1.5rem;z-index:3}.theme-toggle-btn{background:var(--surface-soft);border:1px solid var(--border);border-radius:999px;color:var(--text);cursor:pointer;font-size:.78rem;font-weight:700;padding:.3rem .7rem}.lang-switch{min-width:9.5rem}.lang-switch :deep(.lang-dropdown){min-width:9.5rem}.mobile-nav-backdrop,.mobile-nav-fab,.mobile-nav-sheet{display:none}@media(max-width:900px){.site-nav-desktop{display:none}.mobile-nav-fab{background:var(--accent);border:1px solid var(--border);border-radius:999px;bottom:calc(.9rem + env(safe-area-inset-bottom,0px));box-shadow:0 10px 30px var(--shadow);color:var(--bg);display:inline-flex;font-size:.92rem;font-weight:700;left:50%;letter-spacing:.02em;opacity:0;padding:.65rem 1.3rem;pointer-events:none;position:fixed;transform:translate(-50%,1rem);transition:opacity .3s ease,transform .3s ease;z-index:90}.mobile-nav-fab.is-always-visible,body.nav-visible .mobile-nav-fab{opacity:1;pointer-events:auto;transform:translate(-50%)}.mobile-nav-backdrop{background:#000000a6;display:block;inset:0;opacity:1;position:fixed;z-index:85}.mobile-nav-sheet{bottom:0;display:block;left:0;pointer-events:none;position:fixed;right:0;transform:translateY(102%);transition:transform .3s ease;z-index:95}.mobile-nav-sheet.is-open{pointer-events:auto;transform:translateY(0)}.mobile-nav-sheet-inner{background:var(--surface);border:1px solid var(--border);border-bottom:0;border-top-left-radius:18px;border-top-right-radius:18px;box-shadow:0 -12px 30px var(--shadow);display:grid;gap:.7rem;margin:0 auto;padding:1rem 1rem calc(1rem + env(safe-area-inset-bottom,0px));width:min(36rem,100% - 1rem)}.mobile-nav-sheet-inner>a{background:var(--surface-soft);border:1px solid var(--border);border-radius:10px;display:block;font-size:1rem;font-weight:600;padding:.75rem .85rem;width:100%}}