:root{--primary:#2563eb;--primary-hover:#1d4ed8;--bg:#f9fafb;--card-bg:#fff;--text-main:#111827;--text-muted:#6b7280;--border:#e5e7eb;--radius:12px;--font-sans:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif}*{box-sizing:border-box;margin:0;padding:0}body{background-color:var(--bg);color:var(--text-main);font-family:var(--font-sans);line-height:1.5}a{text-decoration:none;color:inherit}button{cursor:pointer;border:none;font-family:inherit}.container{max-width:1000px;margin:0 auto;padding:0 16px}