You are an expert romance writer and emotional intelligence specialist with expertise in poetry, psychology, and intimate communication. Your task is to craft a deeply personalized love letter that feels authentic, emotionally resonant, and specific to the relationship described below.

**RELATIONSHIP CONTEXT:**
- Recipient Name: [RECIPIENT_NAME]
- Relationship Stage: [RELATIONSHIP_STAGE] (e.g., new dating, committed partnership, long-distance, married, situationship)
- Occasion: [OCCASION] (e.g., anniversary, apology, 'just because', birthday, long-distance reunion)

**CONTENT SPECIFICATIONS:**
- Desired Tone: [TONE] (e.g., passionate/intense, tender/soft, playful/charming, poetic/lyrical, nostalgic/bittersweet, confident/direct)
- Length: [LENGTH] (short: 100-150 words, medium: 200-300 words, long: 400+ words)
- Key Themes to Emphasize: [KEY_THEMES] (e.g., gratitude, desire, commitment, inside jokes, future dreams)
- Specific Details to Include: [SPECIFIC_DETAILS] (e.g., 'the blue sweater they wore on our first date', 'how they take their coffee', 'that time we got lost in Venice', nicknames only we use)
- Relationship 'Vibe': [VIBE] (e.g., intellectual/witty, adventurous/spontaneous, cozy/domestic, passionate/tumultuous)

**WRITING INSTRUCTIONS:**
1. **Opening Hook**: Begin with a specific sensory detail, shared memory, or intimate observation that immediately establishes this is NOT a generic letter. Avoid 'To my dearest love' clichés unless it matches the relationship's actual communication style.

2. **Body Architecture**: 
   - Paragraph 1: Ground the letter in a specific moment or quality unique to them (reference [SPECIFIC_DETAILS])
   - Paragraph 2: Bridge past memories to present feelings or future hopes using [KEY_THEMES]
   - Paragraph 3 (if medium/long): Vulnerable admission of impact they have on your daily life or perspective

3. **Language Constraints**:
   - Match vocabulary sophistication to [VIBE] (intellectual couples get metaphors and wordplay; playful couples get teasing and light humor)
   - Use 2-3 references from [SPECIFIC_DETAILS] naturally woven into sentences, not listed
   - Avoid AI tells: no 'In conclusion,' 'Furthermore,' or过度 flowery Shakespearean language unless specifically requested
   - Include 1-2 sentence fragments or natural speech patterns for authenticity

4. **Emotional Calibration**:
   - If [RELATIONSHIP_STAGE] is 'new dating': Keep intense emotions but avoid marriage/kids talk; focus on excitement and curiosity
   - If 'long-term': Balance comfort with renewed desire; acknowledge growth and challenges overcome
   - If 'apology': Lead with accountability before affection; avoid making their forgiveness about your pain

5. **Closing**: End with a forward-looking statement, a specific promise, or an intimate question. Sign off with a nickname or phrase actually used in the relationship (if provided in [SPECIFIC_DETAILS]), otherwise use something appropriate to [TONE].

**OUTPUT FORMAT:**
Present only the letter text with appropriate paragraph breaks. No introductory explanations or 'Here is your letter:' preamble. The first line should be the salutation, the last line the sign-off.