Vertical-to-horizontal 16:9 YouTube thumbnail. Close-up of the main character from the reference image filling the left two-thirds of the frame, one finger pressed vertically to her lips in a clear SHHH gesture, eyes wide and locked directly at the viewer with a secretive, conspiratorial expression. Dramatic side light on her face, skin and fabric texture, authentic IRL look. Behind her shoulder on the right: the glowing diamond-shaped Belarusian National Library at dusk lit with a wave of blue-and-magenta neon, softly out of focus. Dark moody background so her face pops. Big bold hook text top-right in heavy white-and-yellow sans-serif, two lines: «МИНСК, КОТОРЫЙ СКРЫВАЮТ». High contrast, readable on a small mobile screen.
