:root{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;color:#1a1a1a}body{margin:0}.topbar{display:flex;align-items:baseline;gap:1.5rem;padding:.6rem 1rem;border-bottom:1px solid #ccc}.topbar h1{font-size:1.1rem;margin:0}.nav-item{color:#666;font-size:.95rem}.placeholder{padding:2rem 1rem;color:#666}