.home{background-color:var(--background);color:var(--foreground)}.home.dark{--color-bg:#0a0a0a;--color-bg-secondary:#0f0f0f;--color-bg-tertiary:#151515;--color-text:#e5e7eb;--color-text-secondary:#9ca3af;--color-text-muted:#6b7280;--color-border:#262626;--color-border-hover:#404040;--background:var(--color-bg);--foreground:var(--color-text);color-scheme:dark}.header-premium{position:sticky;top:0;z-index:50;background:linear-gradient(to right,var(--color-bg),var(--color-bg-secondary),var(--color-bg));backdrop-filter:saturate(180%) blur(10px);border-bottom:1px solid var(--color-border);box-shadow:var(--shadow-sm);transition:background .3s ease,box-shadow .3s ease}.home.dark .header-premium{background:linear-gradient(90deg,#000,#0f0f0f,#000)}.header-premium:hover{box-shadow:var(--shadow-md)}.header-premium nav{display:flex;gap:1.25rem;padding:.4rem .9rem;background-color:var(--color-bg-tertiary);border:1px solid var(--color-border);border-radius:999px}.home.dark .header-premium nav{background-color:#111;border-color:#222}.header-premium nav a{padding:.4rem .85rem;font-size:.95rem;font-weight:500;color:var(--color-text-secondary);border-radius:999px}.header-premium nav a.active,.header-premium nav a:hover{color:var(--color-primary);background-color:var(--color-primary-light);font-weight:600}.home.dark .header-premium nav a{color:var(--color-text-muted)}.home.dark .header-premium nav a.active,.home.dark .header-premium nav a:hover{color:#ffffff;background-color:rgba(37,99,235,.18)}