.header{position:fixed;top:0;left:0;right:0;background:hsl(var(--background)/.95);backdrop-filter:blur(10px);z-index:1000;transition:all .3s ease;box-shadow:0 1px 3px 0 rgba(0,0,0,.1),0 1px 2px 0 rgba(0,0,0,.06);border-bottom:1px solid hsl(var(--border))}.header.scrolled{box-shadow:var(--shadow-lg)}.header-container{max-width:1200px;margin:0 auto;padding:1rem 2rem;display:flex;justify-content:space-between;align-items:center}.logo{cursor:pointer}.logo h2{color:hsl(var(--primary));font-size:1.5rem;font-weight:400;letter-spacing:-.01em}.nav{display:flex;gap:1.5rem}.nav button{background:none;border:none;color:hsl(var(--foreground));font-size:1rem;font-weight:400;cursor:pointer;padding:.5rem 1rem;border-radius:6px;transition:all .2s ease}.nav button:hover{background:hsl(var(--muted));color:hsl(var(--primary))}@media (max-width:768px){.header-container{padding:1rem}.nav{gap:.5rem}.nav button{font-size:.875rem;padding:.5rem}.logo h2{font-size:1.25rem}}