.nb-app{--nb-bg: #f6f6f4;--nb-surface: #ffffff;--nb-text: #14161a;--nb-text-muted: #5c6370;--nb-border: #e2e3e7;--nb-accent: #e0362c;--nb-accent-hover: #c62d24;--nb-on-accent: #ffffff;--nb-danger: #b42318;--nb-success-bg: #e8f3eb;--nb-success: #23603a;--nb-focus: #2f6fed;--nb-radius: 12px;--nb-font: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif}.nb-app{min-height:100vh;background:var(--nb-bg);color:var(--nb-text);font-family:var(--nb-font);font-size:16px;line-height:1.5}.nb-app *,.nb-app *:before,.nb-app *:after{box-sizing:border-box}.nb-app :focus-visible{outline:2px solid var(--nb-focus);outline-offset:2px}.nb-button{display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:0 20px;border:0;border-radius:var(--nb-radius);background:var(--nb-accent);color:var(--nb-on-accent);font:inherit;font-weight:600;cursor:pointer}.nb-button:hover:not(:disabled){background:var(--nb-accent-hover)}.nb-button:disabled{opacity:.6;cursor:default}.nb-link-button{padding:0;border:0;background:none;color:var(--nb-text-muted);font:inherit;text-decoration:underline;cursor:pointer}.nb-card{padding:24px;border:1px solid var(--nb-border);border-radius:var(--nb-radius);background:var(--nb-surface)}