/* ============================================================================ دفترِ خواندن — Reading Desk Shangarf extension for long-form pages · Claude Design lane · 2026-07-19 The brief: a collapsible side index so the text can be read full-width, plus a font-size control. The reference (shahname.web.app) keeps one long list open beside the text — good, but it is binary: the list is either there, eating a third of the screen, or you lose your place entirely. This does three things it doesn't: 1. THREE RAIL STATES, not two. باز (full TOC + apparatus) → تیغه (a slim numbered spine that still shows where you are, and expands on hover) → بسته (gone; the text takes the full measure). The middle state is the point: you can reclaim ~85% of the rail's width and still never lose your position in an 11,000-word transcript. 2. THE INDEX KNOWS WHERE YOU ARE. An IntersectionObserver marks the section being read; the spine shows it as a filled pip, the open rail highlights the row, and a hairline progress bar under the header reports how far through the session you are. The reference list is inert by comparison. 3. TEXT SIZE IS A READING SETTING, not a zoom. Four steps scale the body, the ayah and the translation together on their own ratios — scripture keeps its dominance over prose at every step — while the chrome stays put. Every setting persists per-reader in localStorage. ========================================================================= */ /* ---------- reading settings: four text steps --------------------------- */ /* Prose only: 16→20. قلعهٔ آیه — the ayah block and its فولادوند translation are deliberately NOT on this ladder. They used to be (22→28 / 15→18), which meant the typography control resized scripture; the owner's ruling (2026-07-27) is that the reading controls must never touch the ayah. --fs-ayah / --lh-ayah / --fs-tr therefore keep the fixed values set in shangarf.css and are not restated here — restating them at this specificity is exactly how the ladder captured them the first time. */ :root[data-fs="1"]{--fs-body:16px} :root[data-fs="2"]{--fs-body:17px} :root[data-fs="3"]{--fs-body:18.5px} :root[data-fs="4"]{--fs-body:20px} /* ---------- reading settings: three leading steps ----------------------- */ /* Leading is its own axis, not a side effect of size. It used to ride along with the size ladder (1.9→2.05, a range too narrow to be worth having); a reader who wants air between the lines usually does not want larger glyphs as well. Step 2 is the previous default exactly, so an untouched reader sees no change. The ayah keeps --lh-ayah and is untouched here for the same reason as above. */ :root[data-lh="1"]{--lh-body:1.75} :root[data-lh="2"]{--lh-body:1.95} :root[data-lh="3"]{--lh-body:2.25} /* ---------- قلعهٔ آیه, part two: the المیزان boxes ---------------------- 117 pages (almizan/*, nazm-fehrest) carry their own inline