ALETHIOS — TYPOGRAPHY
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Three typefaces, strict roles. All three are free and available on
Google Fonts.

1. PLAYFAIR DISPLAY  (serif — display & all italic accents)
   Use for: marketing headlines (40–76px), pull quotes, big stat
   numerals, and any inline italic word emphasis inside a heading.
   Weights: 400–900, Regular + Italic.
   Get it:  https://fonts.google.com/specimen/Playfair+Display
   Tracking: -0.04em · line-height 1.05–1.15

2. GEIST  (sans-serif — UI, body, wordmark)
   Use for: the logo wordmark (Medium 34), navigation (Medium 14),
   buttons (SemiBold 16), body copy (Regular 14/16, line-height
   1.55–1.6), and micro-labels (10–12).
   Get it:  https://fonts.google.com/specimen/Geist  (also vercel.com/font)

3. GEIST MONO  (monospace — overlines, labels, stats)
   Use for: section overlines, stat-unit labels, the announcement bar,
   timestamps, and any small SYSTEM-style caps.
   Weights: Medium 11–12. Tracking 0.04em default / 0.1em for hero
   overlines. ALWAYS set in UPPERCASE.
   Get it:  https://fonts.google.com/specimen/Geist+Mono

FALLBACK STACKS
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Display : "Playfair Display", "Cormorant Garamond", Georgia, serif
Sans    : "Geist", "Inter", -apple-system, "Segoe UI", system-ui, sans-serif
Mono    : "Geist Mono", "JetBrains Mono", ui-monospace, Menlo, monospace

TYPE SCALE (key sizes)
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Display 1 .... Playfair Regular 64 / 1.05   (hero — mixes regular + italic words)
Display 2 .... Playfair Regular 56 / 1.1
Display 3 .... Playfair Regular 40 / 1.15
Stat numeral . Playfair Italic 76 / 1
H1 ........... Geist Medium 34 / 1.1
H2 ........... Geist SemiBold 32 / 1.15
H3 ........... Geist SemiBold 24 / 1.25
Body lg ...... Geist Regular 16 / 1.6
Body ......... Geist Regular 14 / 1.55
Overline ..... Geist Mono Medium 11–12, UPPERCASE, tracked 0.1em

CASING & STYLE
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• Title Case for buttons and section labels ("Build a Study", "Learn More").
• Sentence case in body copy.
• UPPERCASE mono for overlines, stat units, and the announcement bar.
• Curly quotes and em dashes. Periods on standalone display headlines.
• No emoji. No exclamation points.
