.lth-header{position:fixed;top:0;left:0;right:0;height:var(--header-height);z-index:40;backdrop-filter:blur(26px);background:linear-gradient(to bottom,rgba(5,5,10,0.93),rgba(5,5,10,0.84) 60%,rgba(5,5,10,0));border-bottom:1px solid rgba(0,240,255,0.35);box-shadow:0 18px 30px rgba(0,0,0,0.8)}.lth-header-inner{height:100%}.lth-header-nav{display:flex;align-items:center;justify-content:space-between;height:100%}.lth-header-nav-cluster{display:flex;align-items:center;gap:var(--space-5);font-size:var(--font-size-xs);letter-spacing:0.2em;text-transform:uppercase;color:var(--color-text-muted)}.lth-brand{position:relative;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;text-align:center;color:#fff}.lth-brand-title{font-family:var(--font-display);font-weight:600;font-size:0.95rem;letter-spacing:0.26em;text-transform:uppercase}.lth-brand-subtitle{font-family:var(--font-mono);font-size:0.64rem;letter-spacing:0.24em;color:var(--color-primary);text-transform:uppercase}.lth-nav-link{position:relative;padding-bottom:4px;color:var(--color-text-muted)}.lth-nav-link::after{content:"";position:absolute;left:0;bottom:0;width:0;height:1px;background:linear-gradient(90deg,#00F0FF,#FF0055);transition:width var(--transition-fast)}.lth-nav-link:hover{color:var(--color-primary)}.lth-nav-link:hover::after{width:100%}.lth-nav-link--accent{color:var(--color-primary)}.lth-nav-toggle{margin-left:var(--space-4)}.lth-mobile-nav{display:none}.lth-mobile-nav-list{display:flex;flex-direction:column;gap:var(--space-3);margin-bottom:var(--space-6)}.lth-mobile-nav-meta{font-size:var(--font-size-xs);color:var(--color-text-muted);max-width:32rem}.lth-mobile-nav-open{display:flex}.lth-mobile-nav-open[hidden]{display:flex}.lth-header--nav-open .lth-header{box-shadow:0 22px 40px rgba(0,0,0,0.9)}.lth-header--nav-open .lth-nav-toggle{border-color:rgba(255,0,85,0.8);box-shadow:var(--shadow-glow-accent)}@media (max-width:960px){.lth-header-nav-cluster{display:none}.lth-brand{margin:0 auto}.lth-mobile-nav{display:flex;flex-direction:column;position:fixed;top:var(--header-height);left:0;right:0;bottom:0;background:radial-gradient(circle at 0 0,rgba(0,240,255,0.18),transparent 55%),radial-gradient(circle at 100% 100%,rgba(255,0,85,0.2),transparent 55%),rgba(5,5,10,0.98);backdrop-filter:blur(24px);padding-top:var(--space-6);overflow-y:auto;z-index:55}.lth-mobile-nav[hidden]{display:none}.lth-mobile-nav-list a{display:block;font-size:var(--font-size-md);letter-spacing:0.2em;text-transform:uppercase;color:var(--color-text-muted);padding-bottom:var(--space-2);border-bottom:1px solid rgba(0,240,255,0.24)}.lth-mobile-nav-list a:last-child{border-bottom:none}.lth-mobile-nav-list a:focus-visible,.lth-mobile-nav-list a:hover{color:#fff}}