Editorial poster prompt

FORMAT: 2:3 vertical poster, print-grade, full bleed SUBJECT: a single swimmer mid-dive seen from below the surface LAYOUT: swimmer lower-right third, headline runs vertically along the left edge, upper half empty TYPOGRAPHY: headline "TIDES", sub-line "Summer swim series · Harbor Pool", small footer "Fridays at dusk · free entry"; set as condensed grotesque weight 800 all caps; sub-line in a light serif italic; footer tiny mono; no other text COLOR: dominant deep navy, accent chlorine green, neutral bone; nothing else LIGHT: soft directional light from the upper left SURFACE: fine paper grain, slight ink bleed on the headline edges MOOD: premium, editorial RULES: no watermark, no logo, no signature, no border, text spelled exactly as given AVOID: no messy text, no extra logos, no floating half-legible words, no over-saturation, no cartoon style unless asked