Design a modern mansion that seamlessly integrates concrete and oak wood elements, set amidst a natural landscape. Emphasize sleek, contemporary architecture while incorporating the warmth of oak wood for a harmonious blend of modernity and nature. Envision the mansion's layout, exterior facade, and landscaping to enhance its connection with the surrounding environment. Inside, create a cozy and inviting atmosphere using a combination of contemporary design and oak wood accents. Consider large windows to maximize natural light and provide stunning views of the natural surroundings. Describe the interior spaces that prioritize comfort and a sense of tranquility, making the mansion a luxurious retreat within the embrace of nature. Ultrarealistic, photoreal, ultratedailed, 4K

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