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(prefers-color-scheme:dark){:root:not([data-theme=light]){--bk-ink:var(--gray-100);--bk-paper:var(--gray-900);--bk-bg:var(--gray-950);--bk-card:var(--gray-900);--bk-muted:var(--gray-400);--bk-dim:var(--gray-500);--bk-border:#ffffff14;--bk-surface:var(--gray-900);--bk-shadow:0 1px 3px 0 #00000080, 0 1px 2px -1px #00000080;--accent-h:var(--accent-hover);--accent-bg:var(--accent-muted);--bg-hover:#ffffff0f;--green-bg:var(--success-muted);--logo-stroke:var(--bk-ink);--bg-primary:var(--bk-paper);--bg-secondary:var(--bk-bg);--text-primary:var(--bk-ink);--text-secondary:var(--bk-muted);--text-muted:var(--bk-muted);--border-default:var(--bk-border);--bg-elevated:var(--gray-900);--bg-active:#ffffff1a}}.bk-page-bg{background:linear-gradient(to bottom, var(--gray-50) 0%, var(--gray-100) 50%, var(--gray-100) 100%)}html[data-theme=dark] .bk-page-bg,html.theme-dark .bk-page-bg{background:linear-gradient(to bottom, var(--gray-950) 0%, var(--gray-950) 50%, var(--gray-950) 100%)}@media 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a.active{color:var(--bk-signal)}.bk-header-right{align-items:center;gap:var(--bk-space-2);display:flex}.bk-hamburger{border:1px solid var(--bk-border);border-radius:var(--bk-radius-md);cursor:pointer;background:0 0;flex-direction:column;justify-content:center;align-items:center;gap:5px;width:36px;height:36px;padding:0;display:none}.bk-hamburger span{background:var(--bk-ink);width:18px;height:2px;transition:transform var(--bk-transition-fast), opacity var(--bk-transition-fast);border-radius:1px;display:block}.bk-hamburger[aria-expanded=true] span:first-child{transform:translateY(7px)rotate(45deg)}.bk-hamburger[aria-expanded=true] span:nth-child(2){opacity:0}.bk-hamburger[aria-expanded=true] span:nth-child(3){transform:translateY(-7px)rotate(-45deg)}.bk-mobile-menu{background:var(--bg-primary,var(--bk-card));border-bottom:1px solid var(--bk-border);box-shadow:var(--bk-shadow);z-index:var(--bk-z-overlay);padding:var(--bk-space-4) var(--bk-space-4);gap:var(--bk-space-1);flex-direction:column;display:none;position:absolute;top:65px;left:0;right:0}.bk-mobile-menu.open{display:flex}.bk-mobile-menu a{padding:var(--bk-space-3) var(--bk-space-4);font-size:var(--bk-text-base);font-weight:var(--bk-weight-medium);color:var(--bk-ink);border-radius:var(--bk-radius-md);transition:background var(--bk-transition-fast);text-decoration:none;display:block}.bk-mobile-menu a:hover{background:var(--bg-hover)}@media (max-width:768px){.bk-hamburger{display:flex}.bk-header-nav,.bk-header-right .bk-btn{display:none}.bk-header-logo-text{font-size:16px}}@media (max-width:360px){.bk-header-logo-text{display:none}}.bk-skip-link{top:-100%;left:var(--bk-space-4);background:var(--bk-signal);color:var(--gray-50);padding:var(--bk-space-2) var(--bk-space-4);border-radius:var(--bk-radius-md);font-size:var(--bk-text-sm);font-weight:var(--bk-weight-semibold);z-index:var(--bk-z-top);transition:top 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.lang-trigger__chevron{transform:rotate(180deg)}.lang-dropdown{background:var(--bg-elevated,var(--bg-secondary));border:1px solid var(--border-default);border-radius:var(--radius-md,6px);z-index:200;min-width:160px;animation:.12s ls-dropdown-in;position:absolute;top:calc(100% + 4px);right:0;overflow:hidden;box-shadow:0 8px 24px #00000040}@keyframes ls-dropdown-in{0%{opacity:0;transform:translateY(-4px)}to{opacity:1;transform:translateY(0)}}.lang-option{width:100%;color:var(--text-secondary);font-size:13px;font-family:var(--font-sans);text-align:left;cursor:pointer;background:0 0;border:none;align-items:center;gap:8px;min-height:44px;padding:9px 14px;transition:background .1s,color .1s;display:flex}.lang-option:hover,.lang-option--focused{background:var(--bg-hover,#ffffff0d);color:var(--text-primary)}.lang-option--selected{background:var(--accent-muted,#6366f11f);color:var(--accent);font-weight:600}.lang-option--selected:hover,.lang-option--selected.lang-option--focused{background:var(--accent-muted,#6366f12e)}.lang-option__flag{flex-shrink:0;font-size:17px;line-height:1}.lang-option__name{flex:1}.lang-option__check{color:var(--accent);flex-shrink:0;font-size:12px}.lang-error-toast{background:var(--bg-elevated,var(--bg-secondary));border:1px solid var(--warning-muted);border-radius:var(--radius-md,6px);color:var(--warning);white-space:nowrap;z-index:200;padding:8px 12px;font-size:12px;animation:.12s ls-dropdown-in;position:absolute;top:calc(100% + 4px);right:0;box-shadow:0 4px 12px #0003}[dir=rtl] .lang-dropdown{left:0;right:auto}@media (max-width:640px){.lang-trigger{border-radius:16px;height:32px;padding:0 10px;font-size:12px}}@media (max-width:480px){.lang-dropdown{min-width:unset;width:auto;position:fixed;top:auto;left:8px;right:8px}}