Design a logo for 'HeartCast,' a podcast by Heart Mortgage that discusses topics related to real estate, finance, and lifestyle. The logo should be modern and sleek, incorporating a subtle heart symbol to represent the brand and sound waves or a microphone to signify the podcast theme. Use a clean and professional font for the text and a color palette that reflects trust and warmth, such as deep blues or vibrant reds. The overall design should be eye-catching and convey both expertise and approachability