/* Content protection (DRM-lite). Applied platform-wide via . Blocks casual copy / selection / printing of study content. Form fields stay usable. Opt out per page by rendering without the class (context: allow_download=True). */ body.protected, body.protected * { -webkit-user-select: none; -moz-user-select: none; -ms-user-select: none; user-select: none; } /* keep inputs/textareas/selects and rich-text areas usable */ body.protected input, body.protected textarea, body.protected select, body.protected [contenteditable="true"] { -webkit-user-select: text; -moz-user-select: text; -ms-user-select: text; user-select: text; } /* no dragging images/media out */ body.protected img, body.protected svg, body.protected canvas, body.protected video { -webkit-user-drag: none; -khtml-user-drag: none; user-drag: none; pointer-events: auto; } /* disable printing: blank the page and show a notice instead */ @media print { body.protected * { visibility: hidden !important; } body.protected::before { content: "Printing is disabled. This study content is licensed for on-screen use only."; visibility: visible !important; display: block; position: fixed; top: 40%; left: 0; right: 0; text-align: center; font: 600 15px/1.5 system-ui, Segoe UI, Arial, sans-serif; color: #12233d; padding: 0 24px; } }