Clean science infographic, landscape composition, three horizontal panels explaining how icicles form, on a pale ice-blue background. Panel one: daytime sun melts snow on a roof edge, small water drops forming, short label 'Daytime Melt'. Panel two: at dusk the meltwater drips from the eave, a thin stream falling, short label 'Dusk Drip'. Panel three: overnight the dripping water freezes layer by layer into a long clear icicle hanging from the eave, short label 'Night Freeze'. Simple flat vector style, soft blue and white palette with warm amber sunlight in panel one, thin arrows showing water flow from roof to icicle tip, generous whitespace, crisp readable short labels only. No paragraphs, no extra text, no logos.