Designed with a single-tier cake drawn in deep indigo-blue ink against a warm, creamy off-white background, the scene feels calm and affectionate 🎂. The cake sits on a small pedestal, with neat frosting swirls on top and a wavy band of decoration wrapping around the sides. A lone candle rises from the center, its tiny flame adding a soft point of light that suggests someone close by is making a quiet wish. Small hearts drift upward around the cake like a gentle exchange between friends, mixed with loose confetti squiggles that hint at a low-key celebration 🎉. Below the illustration, the words “Happy Birthday!” appear centered near the bottom in a flowing, dark blue cursive style. Fine cross-hatching and varied line thickness give the cake, candle, and pedestal a textured, sketch-like look without feeling busy. The background stays open and uncluttered, letting the floating hearts and scattered squiggles stand out around the candle’s glow. The indigo hearts and curving confetti marks are sprinkled above and to either side of the cake, leaving the lower area clear for the message.