:root{font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;color:#111827;background:#f3f4f6}*{box-sizing:border-box}body{margin:0}.shell{min-height:100vh;display:grid;grid-template-rows:auto 1fr}.topbar{display:flex;align-items:center;justify-content:space-between;padding:14px 20px;background:#1d4ed8;color:#fff}.main{padding:20px;max-width:720px;margin:0 auto}.card{background:#fff;border-radius:12px;padding:16px;box-shadow:0 1px 3px #00000014;margin-bottom:12px}.btn{border:0;border-radius:8px;padding:10px 14px;cursor:pointer;background:#e5e7eb;margin-right:8px}.btn.primary{background:#1d4ed8;color:#fff}.form{display:grid;gap:12px;max-width:360px}.form label{display:grid;gap:6px}.form input{padding:10px;border:1px solid #d1d5db;border-radius:8px}.muted{color:#6b7280}.error{color:#b91c1c}.pill{display:inline-block;padding:2px 8px;border-radius:999px;background:#dbeafe;font-size:12px}.actions{margin-top:12px}.tabs{display:flex;gap:8px;margin-bottom:12px;flex-wrap:wrap}