Font Pairing: SaaS Mobile Boutique (Calistoga + Inter). Category: Display Serif + Sans + Mono. Heading Font: Calistoga. Body Font: Inter. Mood/Style: saas, boutique, electric, warm, editorial, bold, premium, fintech, business, dual font, human warmth. Best For: B2B SaaS mobile, fintech apps, analytics dashboards, marketing tools, operations platforms. Google Fonts URL: https://fonts.google.com/share?selection.family=Calistoga:ital@0;1|Inter:wght@300;400;500;600;700|JetBrains+Mono:wght@400;500. CSS Import: @import url('https://fonts.googleapis.com/css2?family=Calistoga:ital@0;1&family=Inter:wght@300;400;500;600;700&family=JetBrains+Mono:wght@400;500&display=swap');. Tailwind Config: fontFamily: { display: ['Calistoga', 'serif'], body: ['Inter', 'sans-serif'], mono: ['JetBrains Mono', 'monospace'] }. Notes: Tri-stack: Calistoga (adds human warmth) for heroes 36–42pt leading-1.1; Inter 400–600 for body/UI 16–18pt; JetBrains Mono 12pt uppercase tracking-[1.5] for data labels and section badges. Scale: Hero 36–42pt, Section H2 28–32pt, Body 16–18pt, Label 12pt. Avoid italic Calistoga except editorial callouts..