:root{color-scheme:light dark;font-family:system-ui,sans-serif}body{margin:0}nav{display:flex;gap:1rem;padding:1rem;border-bottom:1px solid light-dark(#ddd,#333)}main{padding:1rem;max-width:960px;margin:0 auto}.stamp-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:1rem;list-style:none;padding:0}.stamp-grid li a{display:flex;flex-direction:column;gap:.25rem;padding:.75rem;border:1px solid light-dark(#ddd,#333);border-radius:8px;text-decoration:none;color:inherit}.filters{display:flex;gap:.5rem;flex-wrap:wrap;margin:1rem 0}.price{font-size:1.5rem;font-weight:600}