/* Preview-only layer: banner + foreground watermark (client previews only). */
.preview-banner{background:#131c4e;color:#fff;text-align:center;font-size:.92rem;font-weight:700;padding:10px 16px;position:relative;z-index:290}
.preview-watermark{position:fixed;inset:0;z-index:500;pointer-events:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='520' height='520'%3E%3Ctext x='40' y='280' font-family='Arial, sans-serif' font-size='64' font-weight='700' fill='%23293690' fill-opacity='0.16' transform='rotate(-30 260 260)'%3EPREVIEW%3C/text%3E%3C/svg%3E");background-size:520px 520px}