OKELIS integrates sustainability certification, ESG, carbon accounting and advanced building-performance analysis. Body copy is set at 9.1 pt on a 1.58 line height for comfortable reading at A4, with headings tracked tightly for a contemporary, engineered feel.
SF Pro is Apple's system typeface, a contemporary neo-grotesque with exceptionally clean numerals and a wide optical-size range. It reads as modern and engineered rather than corporate or generic, and it holds up at both 6 pt caption and 40 pt display.
Two optical variants are used: SF Pro Display for headings, numerals and short labels; SF Pro Text for body copy, where its wider spacing and taller apertures improve legibility at small sizes.
Section labels are set in sentence case with no added tracking, marked by a short accent rule. The wide-tracked capital kicker above a headline, and the coloured left border on callouts, have both been designed out.
| Display | 31–39 pt · Light / Semibold · −0.028 em |
| Section head | 18 pt · Semibold · −0.022 em |
| Sub head | 11.4 pt · Semibold |
| Lead | 11.8 pt · Light · −0.016 em |
| Body | 9.1 pt / 1.58 |
| Statistics | 29 pt · Thin · −0.038 em |
| Format | A4 portrait, 210 × 297 mm |
| Margins | 16 mm sides · 15 mm head · 14 mm foot |
| Grid | 12 columns · 4 mm gutter |
Standard layouts use 6 + 6, 7 + 5, 5 + 7 and 4 + 4 + 4 divisions. Statistics and icon sets run on 3 + 3 + 3 + 3.
The system is built on tokens, so an alternative licensed typeface can be substituted without redrawing any layout. Four pairings can be compared live in the review link.