#canvasScroller.drop-target{outline:4px solid #1976d2;outline-offset:-4px}.file-drop-hint{position:fixed;z-index:10000;top:45%;left:50%;transform:translate(-50%,-50%);max-width:85vw;padding:20px 28px;border:2px dashed #1976d2;border-radius:12px;background:#fff;color:#12395d;font:600 18px/1.6 system-ui,sans-serif;box-shadow:0 8px 30px #12395d33;pointer-events:none}