/* GRN — the book's contents on chapter and part pages (grn-toc.js). Rail of stations beside the text on wide
   screens; "where am I" bar + frosted sheet (the menu's glass) on phones and tablets. */
.gtoc-rail,.gtoc-bar,.gtoc-sheet{--gt-ink:#140700;--gt-paper:#FFFDF9;--gt-cream:#FAF7F2;--gt-line:#E2D7C6;--gt-gold:#C9A26B;--gt-goldink:#8A6A35;--gt-grey:#6B5F55;font-family:Inter,system-ui,sans-serif;box-sizing:border-box;-webkit-font-smoothing:antialiased}
html[dir=rtl] .gtoc-rail,html[dir=rtl] .gtoc-bar,html[dir=rtl] .gtoc-sheet{font-family:Vazirmatn,Tahoma,sans-serif}
.gtoc-rail *,.gtoc-bar *,.gtoc-sheet *{box-sizing:border-box}
@view-transition{navigation:auto}
.gtoc-rail{view-transition-name:grn-toc}
.gtoc-bar{view-transition-name:grn-tocbar}
::view-transition-old(root),::view-transition-new(root){animation-duration:.28s}

/* ---- rail (wide screens) ---- */
.gtoc-rail{position:fixed;z-index:40;width:226px;display:flex;flex-direction:column;color:var(--gt-ink);transition:opacity .3s,transform .3s}
.gtoc-rail[hidden]{display:none!important}
.gtoc-rail.away{opacity:0;transform:translateY(-8px);pointer-events:none}
.gtoc-h{padding:0 0 16px;border-bottom:1px solid var(--gt-line)}
.gtoc-eyb{font:600 10.5px/1 Inter,system-ui,sans-serif;letter-spacing:.14em;text-transform:uppercase;color:var(--gt-goldink)}
html[dir=rtl] .gtoc-eyb{font-family:inherit;letter-spacing:0;font-size:12.5px;font-weight:700}
.gtoc-where{margin-top:10px;font-size:13px;line-height:1.5;font-weight:500}
.gtoc-prog{margin-top:12px;display:flex;align-items:center;gap:10px;font-size:11.5px;color:var(--gt-grey)}
.gtoc-ln{flex:1;height:3px;border-radius:2px;background:var(--gt-line);position:relative;overflow:hidden}
.gtoc-ln i{position:absolute;inset-block:0;inset-inline-start:0;background:var(--gt-gold)}
.gtoc-list{position:relative;flex:1;min-height:0;overflow-y:auto;overscroll-behavior:contain;padding:8px 8px 8px 0;margin-inline-end:-8px;scrollbar-width:thin;scrollbar-color:var(--gt-line) transparent}
html[dir=rtl] .gtoc-list{padding:8px 0 8px 8px}
.gtoc-pt{border-bottom:1px solid rgba(226,215,198,.6)}
html body .gtoc-ph{all:unset;box-sizing:border-box;width:100%;display:grid;grid-template-columns:24px minmax(0,1fr) 14px;gap:10px;align-items:center;padding:13px 2px;cursor:pointer;border-radius:8px;color:inherit}
html body .gtoc-ph:hover{background:none;color:inherit}
html body .gtoc-ph:focus-visible{outline:2px solid var(--gt-goldink);outline-offset:1px}
.gtoc-no{font:600 16px/1 Inter,system-ui,sans-serif;color:var(--gt-gold);text-align:center;font-variant-numeric:tabular-nums}
html[dir=rtl] .gtoc-no{font-family:inherit}
.gtoc-nm b{display:block;font-size:13px;font-weight:600;line-height:1.4}
.gtoc-nm small{display:block;font-size:11.5px;color:var(--gt-grey);margin-top:3px}
.gtoc-chev{width:14px;height:14px;fill:none;stroke:var(--gt-grey);stroke-width:2;transition:transform .25s}
.gtoc-pt.open .gtoc-chev{transform:rotate(180deg)}
.gtoc-st{display:none;position:relative;list-style:none;margin:2px 0 14px;padding:0;padding-inline-start:34px}
.gtoc-pt.open .gtoc-st{display:block}
.gtoc-st li{margin:0;padding:0;list-style:none}
.gtoc-st::before{content:"";position:absolute;inset-block:12px 16px;inset-inline-start:12px;width:2px;background:var(--gt-gold);opacity:.55}
.gtoc-st::after{content:"";position:absolute;inset-block:12px 16px;inset-inline-start:8px;width:10px;background:repeating-linear-gradient(to bottom,rgba(201,162,107,.45) 0 1px,transparent 1px 9px)}
html body a.gtoc-s{position:relative;display:grid;gap:2px;margin:3px 0;padding:8px 10px;border-radius:10px;font-size:12.5px;line-height:1.5;color:#3b2c1f;text-decoration:none;background:none;transition:background-color .15s}
html body a.gtoc-s:hover{background:rgba(201,162,107,.13);color:var(--gt-ink)}
html body a.gtoc-s:focus-visible{outline:2px solid var(--gt-goldink);outline-offset:1px}
.gtoc-d{position:absolute;inset-inline-start:-27px;top:13px;width:11px;height:11px;border-radius:50%;background:var(--gt-cream);border:2px solid var(--gt-gold);z-index:1}
a.gtoc-s.done .gtoc-d{background:var(--gt-gold)}
.gtoc-m{font-size:11px;color:var(--gt-grey);font-variant-numeric:tabular-nums}
html body a.gtoc-s.cur{background:var(--gt-ink);color:var(--gt-paper)}
html body a.gtoc-s.cur .gtoc-m{color:var(--gt-gold)}
a.gtoc-s.cur .gtoc-d{width:17px;height:17px;inset-inline-start:-30px;top:10px;background:var(--gt-gold);border-color:var(--gt-ink);box-shadow:0 0 0 3px rgba(201,162,107,.35)}
.gtoc-here{font-size:10.5px;letter-spacing:.06em;text-transform:uppercase}
html[dir=rtl] .gtoc-here{letter-spacing:0;font-size:11px}

/* ---- bar (phones, tablets) ---- */
html body button.gtoc-bar{position:fixed;z-index:45;inset-inline:max(12px,env(safe-area-inset-left,0px));margin:0 auto;max-width:560px;display:flex;align-items:center;gap:10px;padding:10px 14px;border-radius:14px;border:1px solid var(--gt-line);background:rgba(255,253,249,.9);-webkit-backdrop-filter:blur(14px) saturate(1.4);backdrop-filter:blur(14px) saturate(1.4);box-shadow:0 10px 24px -18px rgba(20,7,0,.6);color:var(--gt-ink);font-size:13px;line-height:1.3;text-align:start;cursor:pointer;overflow:hidden;opacity:0;transform:translateY(-10px);pointer-events:none;transition:opacity .25s,transform .3s cubic-bezier(.2,.8,.2,1)}
html body button.gtoc-bar.show{opacity:1;transform:none;pointer-events:auto}
html body button.gtoc-bar:hover,html body button.gtoc-bar:focus{background:rgba(255,253,249,.96);color:var(--gt-ink);border-color:var(--gt-line)}
html body button.gtoc-bar:focus-visible{outline:2px solid var(--gt-goldink);outline-offset:2px}
.gtoc-bar[hidden]{display:none!important}
.gtoc-dot{width:10px;height:10px;border-radius:50%;background:var(--gt-gold);box-shadow:0 0 0 3px rgba(201,162,107,.3);flex:none}
.gtoc-bw{flex:1;min-width:0;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.gtoc-bw b{font-weight:600}
.gtoc-bo{display:flex;align-items:center;gap:4px;font-weight:600;color:var(--gt-goldink);flex:none}
.gtoc-bo svg{width:14px;height:14px;fill:none;stroke:currentColor;stroke-width:2}
.gtoc-rp{position:absolute;inset-inline:0;bottom:0;height:2px;background:var(--gt-gold);transform:scaleX(0);transform-origin:left center}
html[dir=rtl] .gtoc-rp{transform-origin:right center}

/* ---- sheet (the menu's frosted glass, rail edge with a train) ---- */
.gtoc-scrim{position:fixed;inset:0;z-index:100000;background:rgba(20,7,0,.4);opacity:0;pointer-events:none;transition:opacity .3s}
.gtoc-sheet{position:fixed;z-index:100001;inset-inline:max(8px,env(safe-area-inset-left,0px));bottom:max(8px,env(safe-area-inset-bottom,0px));margin:0 auto;max-width:560px;max-height:78vh;display:flex;flex-direction:column;border-radius:26px;color:#f5ecdd;background:linear-gradient(160deg,rgba(40,22,9,.86),rgba(20,7,0,.8));-webkit-backdrop-filter:blur(28px) saturate(1.6);backdrop-filter:blur(28px) saturate(1.6);box-shadow:inset 0 0 0 1px rgba(201,162,107,.3),0 30px 60px -20px rgba(0,0,0,.6);transform:translateY(110%);visibility:hidden;transition:transform .5s cubic-bezier(.2,.9,.25,1.05),visibility 0s .5s;outline:none}
html.gtoc-open .gtoc-scrim{opacity:1;pointer-events:auto}
html.gtoc-open .gtoc-sheet{transform:none;visibility:visible;transition:transform .5s cubic-bezier(.2,.9,.25,1.05),visibility 0s}
.gtoc-rail-edge{position:relative;height:12px;margin:12px 22px 0;border-top:2px solid rgba(201,162,107,.8);background:repeating-linear-gradient(90deg,rgba(201,162,107,.55) 0 1.5px,transparent 1.5px 12px) 0 0/100% 7px no-repeat}
.gtoc-train{position:absolute;top:-9px;inset-inline-start:0;width:30px;height:11px;border-radius:6px 9px 3px 3px;background:#f3d9a4;opacity:0}
html.gtoc-open .gtoc-train{animation:gtoc-run 1.6s .25s cubic-bezier(.4,0,.2,1) both}
html[dir=rtl].gtoc-open .gtoc-train{animation-name:gtoc-runr}
@keyframes gtoc-run{0%{opacity:1;transform:translateX(0)}85%{opacity:1}100%{opacity:0;transform:translateX(min(480px,80vw))}}
@keyframes gtoc-runr{0%{opacity:1;transform:translateX(0)}85%{opacity:1}100%{opacity:0;transform:translateX(max(-480px,-80vw))}}
.gtoc-sh{display:flex;align-items:flex-start;justify-content:space-between;gap:12px;padding:14px 22px 6px}
.gtoc-sheet .gtoc-eyb{color:var(--gt-gold)}
.gtoc-sheet .gtoc-where{color:#f5ecdd}
html body .gtoc-x{all:unset;box-sizing:border-box;width:36px;height:36px;border-radius:50%;display:grid;place-items:center;border:1px solid rgba(201,162,107,.45);color:#f3d9a4;cursor:pointer;flex:none}
html body .gtoc-x:hover{background:rgba(201,162,107,.15);color:#f3d9a4}
html body .gtoc-x:focus-visible{outline:2px solid #f3d9a4;outline-offset:2px}
.gtoc-x svg{width:16px;height:16px;fill:none;stroke:currentColor;stroke-width:2}
.gtoc-sheet .gtoc-prog{margin:4px 22px 6px;color:#b9a78c}
.gtoc-sheet .gtoc-ln{background:rgba(255,255,255,.14)}
.gtoc-sheet .gtoc-list{padding:0 14px 16px;margin:0}
.gtoc-sheet .gtoc-pt{border-color:rgba(201,162,107,.18)}
.gtoc-sheet .gtoc-nm small,.gtoc-sheet .gtoc-chev{color:#b9a78c;stroke:#b9a78c}
.gtoc-sheet .gtoc-ph{padding:14px 4px}
html body .gtoc-sheet a.gtoc-s{color:#eadfcd;font-size:14px;padding:10px 10px}
html body .gtoc-sheet a.gtoc-s:hover{background:rgba(201,162,107,.13);color:#fff}
.gtoc-sheet .gtoc-m{color:#b9a78c}
.gtoc-sheet .gtoc-d{background:#1e1208;top:15px}
html body .gtoc-sheet a.gtoc-s.cur{background:rgba(201,162,107,.2);color:#fff}
.gtoc-sheet a.gtoc-s.cur .gtoc-d{border-color:#1e1208;top:12px}
html.gtoc-open,html.gtoc-open body{overflow:hidden}

@media (prefers-reduced-motion:reduce){
  @view-transition{navigation:none}
  .gtoc-rail,.gtoc-bar,.gtoc-sheet,.gtoc-scrim,.gtoc-chev{transition:none!important}
  html.gtoc-open .gtoc-train{animation:none}
}