A minimal dreamy night sky background for a mobile app, vertical portrait orientation,
9:16 ratio. Soft flat illustration with smooth gradients fading from deep indigo and
violet at the top to dark purple at the bottom. A small glowing crescent moon in the
upper area and a few scattered faint golden stars. Lots of empty dark space in the center
for app content. Very subtle wisps of soft mist. Simple dark silhouettes of low rolling
hills and a thin line of grass along the bottom edge. Calm, ethereal, atmospheric and
uncluttered. Muted purples and dark blues, gentle gold accents. Clean negative space,
soft glow, seamless full-bleed composition with no frame.
