Design a landing page for a SaaS product: an AI tool for writing, aimed at content creators.

Style: modern, clean and minimal.
Colors: background in dark #0f0f0f, accents in neon green #00ff88.
Font: Inter.

Sections to include:
1. Hero with a headline and a CTA button
2. 3 cards presenting features, each with an icon
3. Pricing with 3 tiers