body{margin:0;font-family:system-ui,sans-serif;color:#1a1a1a;background:#f7f7f8}.app-header{display:flex;justify-content:space-between;align-items:center;padding:12px 24px;background:#fff;border-bottom:1px solid #e2e2e5}.app-header a{font-weight:600;text-decoration:none;color:#1a1a1a}.app-main{max-width:960px;margin:0 auto;padding:24px}button{cursor:pointer}.form-row{display:flex;flex-direction:column;gap:4px;margin-bottom:12px}.form-row label{font-size:.85em;color:#555}.error-banner{background:#fdecea;color:#b3261e;border:1px solid #f5c2c0;border-radius:6px;padding:8px 12px;margin-bottom:16px}.warning-banner{background:#fff4e5;color:#8a5a00;border:1px solid #f5dca0;border-radius:6px;padding:8px 12px;margin-bottom:16px;display:flex;align-items:center;gap:12px;flex-wrap:wrap}