Prompt cover buku yang menyisakan ruang untuk judul

Contemporary thriller cover artwork: a single small rowing boat adrift on a flat, glassy grey lake at dawn, heavy mist swallowing the far shore, one thin band of cold orange on the horizon. High contrast, desaturated palette of slate, charcoal and one warm accent. Large empty sky occupying the upper third for typography. Cinematic, ominous, no text or lettering.

Quiet literary fiction cover artwork: a single wooden chair standing in an empty room with a bare floorboard and a slanted rectangle of afternoon light falling across it. Muted palette of dust, ochre and pale blue, visible paper grain and painterly texture, generous empty wall space above the chair for typography. Restrained and symbolic, no text or lettering.

Space opera cover artwork: an enormous ringed planet filling the lower half of the frame, a tiny silhouetted ship crossing in front of it leaving a thin ion trail, star field and faint nebula above. Deep indigo and violet palette with one cyan accent, strong silhouette that reads at thumbnail size, clear dark sky in the upper third for typography. Epic scale, no text or lettering.

Cozy mystery cover illustration: a narrow cobbled village lane with crooked shopfronts, window boxes of flowers, a bicycle leaning against a wall and a black cat sitting in a doorway. Warm inviting palette of butter yellow, sage and dusty rose, flat charming illustration style with clean shapes. Sky and rooftops left open at the top for typography, no signage, no text or lettering.

Contemporary romance cover illustration: two figures seen from behind at a distance, walking apart along a sunlit shoreline, their long shadows almost touching. Bright high-key palette of coral, cream and sky blue, soft flat illustration with rounded shapes and simple faceless figures. Wide empty sky in the upper half for typography, optimistic and warm, no text or lettering.

Historical fiction cover artwork: a tall wooden sailing ship at anchor in a misty harbour at first light, rigging silhouetted against a pale sky, small figures on the quay in period coats. Painterly oil-on-canvas texture, muted palette of sea green, sand and warm grey. Sky open across the top third for typography, atmospheric and evocative, no text or lettering.

Modern non-fiction cover artwork: a clean abstract composition of connected circles and lines forming an ordered network across the lower two-thirds, one node highlighted in a bright accent. Flat vector style, generous negative space, limited palette of deep navy, off-white and one signal orange. Whole upper third left empty for typography, confident and intellectual, no text or lettering.

Psychological horror cover artwork: a long empty corridor of an old building receding into darkness, peeling wallpaper, a single bare bulb throwing a weak cone of light halfway down, one door ajar with blackness behind it. Nearly monochrome palette of sickly green-grey with deep crushed blacks, heavy vignette, film grain. Dark ceiling space at the top for typography, no text or lettering.

Memoir cover artwork: a person seen from behind, silhouetted at a rain-streaked window, one hand resting on the glass, warm interior lamplight behind them and a blurred city beyond. Painterly and intimate, muted palette of amber, deep blue and grey, face not visible. Clear darker area across the top for typography, reflective and personal, no text or lettering.

Children's picture book cover illustration: a small fox and an owl sitting together on a mossy log in a friendly stylised forest, oversized mushrooms and round trees, fireflies drifting in the air. Warm storybook palette of moss green, pumpkin and cream, soft gouache texture, gentle rounded shapes. Open sky at the top for typography, cheerful and welcoming, no text or lettering.