:root{font-family:system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;color:#111827;background:#f3f4f6}*{box-sizing:border-box}body{margin:0}button,input,select{min-height:44px;font:inherit}.app-shell{max-width:1180px;margin:0 auto;padding:20px}header{margin-bottom:20px}.eyebrow{margin:0;font-size:.85rem;text-transform:uppercase;letter-spacing:.08em}nav{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:20px}nav button{padding:10px 14px}.content{background:#fff;border-radius:14px;padding:20px}.summary-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(170px,1fr));gap:12px}.summary-grid article{display:flex;flex-direction:column;gap:8px;padding:16px;border:1px solid #e5e7eb;border-radius:12px}form{display:grid;gap:14px;max-width:560px}label{display:grid;gap:6px}input,select{width:100%;padding:10px 12px}@media(max-width:640px){.app-shell{padding:12px}nav{display:grid;grid-template-columns:1fr 1fr}.summary-grid{grid-template-columns:1fr}.content{padding:14px}}