.bt-header{position:fixed;top:10px;left:50%;z-index:1000;width:min(var(--header-w),calc(100% - 24px));transform:translateX(-50%);border:1px solid color-mix(in oklab,var(--border),transparent 20%);border-radius:22px;background:color-mix(in oklab,var(--bg),transparent 12%);backdrop-filter:blur(16px);box-shadow:var(--shadow);transition:transform .24s var(--ease),opacity .2s var(--ease)}.bt-header__inner{display:flex;align-items:center;min-height:66px;padding:10px 18px;gap:16px}.bt-header__brand{flex:0 0 auto;display:flex;align-items:center;min-width:0}.bt-brand-text{font-weight:800;color:var(--fg);white-space:nowrap}.bt-custom-logo-link,.bt-custom-logo-wrap{display:flex;align-items:center}.bt-custom-logo,.bt-drawer-logo{max-height:34px;width:auto}.bt-header__nav-slot{flex:1;min-width:0}.bt-header__nav{display:flex}.bt-menu{display:flex;align-items:center;gap:6px;margin:0;padding:0;list-style:none}.bt-menu li{position:relative;margin:0}.bt-menu a{display:flex;align-items:center;gap:6px;padding:9px 12px;border-radius:12px;color:var(--fg);font-size:14px;font-weight:600;line-height:1.5}.bt-menu a:hover{background:color-mix(in oklab,var(--brand-100),transparent 30%);color:var(--link)}.bt-menu-caret{display:inline-flex;order:-1}.bt-caret{width:14px;height:14px;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}.bt-header__actions{display:flex;align-items:center;gap:8px;margin-inline-start:auto}.bt-icon-btn{width:38px;height:38px;display:inline-flex;align-items:center;justify-content:center;border:1px solid var(--border);border-radius:14px;background:var(--surface);color:var(--fg);padding:0}.bt-icon{width:18px;height:18px;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}.bt-icon--moon{fill:currentColor;stroke:0}.bt-theme-toggle .bt-icon--sun{display:none}:root[data-theme=dark] .bt-theme-toggle .bt-icon--moon{display:none}:root[data-theme=dark] .bt-theme-toggle .bt-icon--sun{display:block}.bt-search-overlay{position:fixed;inset:0;z-index:1200;display:grid;place-items:center;background:color-mix(in oklab,#000,transparent 52%);backdrop-filter:blur(3px)}.bt-search-overlay[hidden]{display:none}.bt-search-box{position:relative;width:min(720px,92vw);padding:56px 18px 18px;border:1px solid var(--border);border-radius:18px;background:var(--bg);box-shadow:var(--shadow)}.bt-close-search{position:absolute;top:12px;inset-inline-end:12px}.bt-search-box input{width:100%;min-height:52px;padding:12px 16px;border:1px solid var(--border);border-radius:14px;background:var(--surface);color:var(--fg);outline:0}.bt-search-box input:focus{border-color:var(--brand-500);box-shadow:0 0 0 4px var(--ring)}.bt-drawer{position:fixed;inset:0;z-index:1190}.bt-drawer[hidden]{display:none}.bt-drawer__backdrop{position:absolute;inset:0;background:color-mix(in oklab,#000,transparent 50%)}.bt-drawer__panel{position:absolute;top:0;right:0;width:min(390px,88vw);height:100%;padding:14px;background:var(--bg);box-shadow:var(--shadow);transform:translateX(105%);transition:transform .28s var(--ease);overflow:auto}.bt-drawer.is-open .bt-drawer__panel{transform:translateX(0)}.bt-drawer__header{display:flex;align-items:center;justify-content:space-between;margin-bottom:12px}.bt-drawer__content .bt-menu{display:block}.bt-drawer__content .bt-menu a{justify-content:space-between;padding:12px}.bt-drawer__content .sub-menu{display:none;margin:6px 0 0;padding:6px;border-radius:14px;background:var(--surface);list-style:none}.bt-drawer__content li[aria-open=true]>.sub-menu{display:block}html.bt-chrome-hidden .bt-header{transform:translate(-50%,calc(-100% - 24px));opacity:0;pointer-events:none}.bt-pulse{animation:bt-pulse .8s ease-out 1}@keyframes bt-pulse{0%{box-shadow:0 0 0 0 var(--ring)}100%{box-shadow:0 0 0 10px transparent}}
@media(min-width:1025px){.bt-menu-toggle{display:none}.bt-drawer{display:none}.bt-header__nav .sub-menu{position:absolute;top:calc(100% + 12px);right:0;z-index:20;display:none;min-width:220px;max-width:72vw;margin:0;padding:8px;list-style:none;border:1px solid var(--border);border-radius:16px;background:color-mix(in oklab,var(--bg),#fff 6%);box-shadow:var(--shadow)}.bt-header__nav li:hover>.sub-menu,.bt-header__nav li:focus-within>.sub-menu{display:block}.bt-header__nav .sub-menu .sub-menu{top:0;right:calc(100% + 10px)}.bt-header__nav .sub-menu .bt-caret{transform:rotate(90deg)}.bt-mega-2>.sub-menu{column-count:2}.bt-mega-4>.sub-menu{column-count:4}.bt-mega-2>.sub-menu>li,.bt-mega-4>.sub-menu>li{break-inside:avoid}}
@media(max-width:1024px){.bt-header{top:8px;width:calc(100% - 16px);border-radius:18px}.bt-header__inner{min-height:58px;padding:8px;gap:8px}.bt-header__brand{flex:1}.bt-header__nav-slot{display:none}.bt-header__actions{gap:6px}.bt-icon-btn{width:35px;height:35px;border-radius:12px}.bt-custom-logo{max-height:30px}.bt-search-overlay{place-items:start center}.bt-search-box{margin-top:9vh}}
@media(prefers-reduced-motion:reduce){.bt-header,.bt-drawer__panel{transition:none}}