body{background-color:transparent;color:inherit}.header-nav{background-color:hsl(var(--card));box-shadow:0 2px 4px rgba(0,0,0,.05)}.nav-link{color:hsl(var(--foreground));padding:8px 16px;border-radius:6px;transition:background-color .2s,color .2s}.nav-link:hover{background-color:hsl(var(--accent))}.nav-link.active{background-color:hsl(var(--primary));color:hsl(var(--primary-foreground))}footer{background-color:hsl(var(--card));border-top:1px solid hsl(var(--border))}.whatsapp-btn{position:fixed;bottom:20px;right:20px;background-color:#25D366;color:white;padding:12px 20px;border-radius:50px;display:flex;align-items:center;gap:8px;box-shadow:0 4px 12px rgba(0,0,0,.15);font-weight:600;transition:transform .2s,box-shadow .2s;z-index:1000}.whatsapp-btn:hover{transform:scale(1.05);box-shadow:0 6px 16px rgba(0,0,0,.2)}.btn-primary{background-color:hsl(var(--primary));color:hsl(var(--primary-foreground))}.btn-primary:hover{background-color:hsl(var(--primary)/.9)}.bg-grid-pattern{background-image:linear-gradient(to right,hsl(var(--border)) 1px,transparent 1px),linear-gradient(to bottom,hsl(var(--border)) 1px,transparent 1px);background-size:2rem 2rem}