:root{font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;color:#1a1a1a;background:#f7f8fa}*{box-sizing:border-box}body{margin:0}a{color:#2563eb;text-decoration:none}.container{max-width:1024px;margin:0 auto;padding:1.5rem}.nav{display:flex;gap:1rem;align-items:center;padding:1rem 1.5rem;background:#fff;border-bottom:1px solid #e5e7eb}.nav .brand{font-weight:700;margin-right:auto}.card{background:#fff;border:1px solid #e5e7eb;border-radius:10px;padding:1rem}.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:1rem}button{cursor:pointer;padding:.5rem .9rem;border-radius:8px;border:1px solid #2563eb;background:#2563eb;color:#fff;font-size:.95rem}input{width:100%;padding:.55rem .7rem;border:1px solid #d1d5db;border-radius:8px;margin:.35rem 0 .9rem}