*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;background-color:#f8fafc;color:#1e293b;line-height:1.6}.hidden{display:none!important}.btn{padding:8px 16px;border:none;border-radius:6px;cursor:pointer;font-size:14px;font-weight:500;text-decoration:none;display:inline-flex;align-items:center;gap:6px;transition:all .2s ease}.btn-primary{background:#3b82f6;color:#fff}.btn-primary:hover{background:#2563eb}.btn-success{background:#10b981;color:#fff}.btn-success:hover{background:#059669}.btn-warning{background:#f59e0b;color:#fff}.btn-warning:hover{background:#d97706}.btn-danger{background:#ef4444;color:#fff}.btn-danger:hover{background:#dc2626}.btn-secondary{background:#6b7280;color:#fff}.btn-secondary:hover{background:#4b5563}