/* ==========================================================================
   seiflden.com v3 - Revenue Engineering Doctrine 2.0 (doctrine_{en,ar}.html)
   Loaded after pub.css (shared tokens, fonts, topbar, footer, author box).
   Doctrine-only layout, typography, callouts, diagrams, tools and print edition.
   Logical properties throughout; the few physical rules are marked RTL.
   ========================================================================== */

@font-face {
  font-family: "Inter Fallback";
  src: local("Arial");
  size-adjust: 107%;
  ascent-override: 90%;
  descent-override: 22.4%;
  line-gap-override: 0%;
}
:root {
  --font-sans: "Inter", "Inter Fallback", system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  --fs-body: 1.0625rem;
  --lh-body: 1.65;
  --col: 68ch;
  --gut: 16px;
  --hair: 1px solid var(--border);
}
html[lang="ar"] {
  --font-sans: "IBM Plex Sans Arabic", "Inter", "Inter Fallback", system-ui, "Segoe UI", Tahoma, Arial, sans-serif;
  --fs-body: 1.125rem;
  --lh-body: 1.9;
  --col: 62ch;
}
html { scroll-padding-block: calc(var(--topbar-h) + 24px) 88px; }
[id] { scroll-margin-top: 0; }
.no-js .js-only { display: none !important; }
.js .nojs-only { display: none !important; }
.vh {
  position: absolute !important; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}
.icon-fill { fill: currentColor; stroke: none; }
html[lang="ar"] em { font-style: normal; font-weight: 600; color: var(--text-1); }
.skip-toc { display: none; }
@media (min-width: 1100px) { .skip-toc { display: block; } }

/* ---------- Top bar ---------- */
.d-top { position: sticky; }
.d-top-in {
  display: flex; align-items: center; justify-content: space-between; gap: 8px;
  max-width: 1400px; min-height: var(--topbar-h); margin-inline: auto; padding-inline: var(--gut);
}
.d-top .topbar-actions { gap: 2px; }
.d-toc-btn { gap: 8px; padding-inline: 12px; border: 1px solid var(--border-strong); }
.d-count { color: var(--text-3); font-weight: 500; font-variant-numeric: tabular-nums; font-size: .8125rem; }
.d-lang .l-short { display: none; }
.d-gate { margin-inline-end: 6px; white-space: nowrap; }
@media (max-width: 859px) { .d-gate { display: none; } }   /* below this the topbar is full: the gate stays one tap away in the lead-in card and the end CTAs */
@media print { .d-gate { display: none !important; } }
@media (max-width: 479px) {
  /* keep the long name in the accessibility tree (axe link-name); only the short form is drawn */
  .d-lang .l-long { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
  .d-lang .l-short { display: inline; }
  .d-lang { min-width: 44px; padding-inline: 8px; }
  .d-toc-btn { padding-inline: 10px; }
}
@media (max-width: 419px) {
  .d-toc-btn .t-lbl { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
}
@media (min-width: 1100px) { .d-toc-btn { display: none; } }
.d-progress { position: absolute; inset-inline: 0; inset-block-end: -1px; height: 2px; pointer-events: none; }
.d-progress i {
  display: block; height: 100%; background: var(--accent);
  transform: scaleX(0); transform-origin: 0 50%;
}
html[dir="rtl"] .d-progress i { transform-origin: 100% 50%; } /* RTL: grows from the inline start */

.d-main { padding-block: 0 64px; }
.d-wrap { max-width: 1400px; margin-inline: auto; padding-inline: var(--gut); }
.d-main .breadcrumb { max-width: none; margin: 0; }
@media (min-width: 768px) { :root { --gut: 32px; } }

/* ---------- Cover: the Index Plate ---------- */
.plate {
  position: relative; overflow: hidden;
  background: radial-gradient(70% 60% at 88% 8%, var(--glow), transparent 65%), var(--s1);
  border-block: var(--hair);
}
html[dir="rtl"] .plate { background: radial-gradient(70% 60% at 12% 8%, var(--glow), transparent 65%), var(--s1); }
.plate-in {
  position: relative; display: grid; gap: 28px;
  max-width: 1400px; margin-inline: auto; padding: 40px var(--gut) 32px;
}
.plate-title { position: relative; z-index: 1; min-width: 0; }
.plate-kick {
  display: flex; align-items: center; margin: 0 0 18px;
  color: var(--accent-text); font-size: .8125rem; font-weight: 700; letter-spacing: .12em; text-transform: uppercase;
}
html[lang="ar"] .plate-kick { letter-spacing: 0; font-size: .9375rem; }
.plate-h1 {
  margin: 0 0 20px; max-width: 11em;
  font-size: clamp(2.5rem, 1.6rem + 3.5vw, 4.5rem); line-height: 1.02; font-weight: 700; letter-spacing: -.035em;
  text-wrap: balance;
}
html[lang="ar"] .plate-h1 { max-width: 11em; font-size: clamp(2.35rem, 1.5rem + 3.2vw, 4.25rem); line-height: 1.3; letter-spacing: 0; }
.plate-dek { max-width: 36em; margin: 0 0 24px; color: var(--text-2); font-size: clamp(1.0625rem, 1rem + .45vw, 1.3125rem); line-height: 1.5; text-wrap: pretty; }
html[lang="ar"] .plate-dek { line-height: 1.8; }
.plate-tldr { max-width: 40em; margin: 0 0 20px; padding-inline-start: 14px; border-inline-start: 3px solid var(--accent); color: var(--text-1); font-size: clamp(1rem, .95rem + .3vw, 1.125rem); line-height: 1.6; text-wrap: pretty; }
.plate-tldr strong { font-weight: 700; }
html[lang="ar"] .plate-tldr { line-height: 1.85; }
.plate-epi {
  display: inline-block; margin: 0 0 28px; padding-inline-start: 14px;
  border-inline-start: 3px solid var(--accent);
  color: var(--text-1); font-size: 1.1875rem; font-weight: 600; line-height: 1.45;
}
.plate-motif {
  position: absolute; z-index: 0; inset-block-start: 0; inset-inline-end: -8%;
  width: 78%; max-width: 520px; opacity: .45; pointer-events: none;
}
.motif { display: block; width: 100%; height: auto; }
.motif .mc { fill: none; stroke: var(--border-strong); stroke-width: 1.2; vector-effect: non-scaling-stroke; transition: stroke var(--t-slow) var(--ease); }
.motif .mc.on { stroke: var(--accent); stroke-width: 2.4; }
.motif .mdot { fill: var(--accent); }
html[data-path] .motif .mc.on { stroke: var(--border-strong); stroke-width: 1.2; }
html[data-path="ceo"] .motif .mc[data-p~="ceo"],
html[data-path="cfo"] .motif .mc[data-p~="cfo"],
html[data-path="board"] .motif .mc[data-p~="board"],
html[data-path="ops"] .motif .mc[data-p~="ops"] { stroke: var(--accent); stroke-width: 2.4; }
html[data-path] .motif .mdot { fill: transparent; }

.plate-idx { position: relative; z-index: 1; border-block-start: 1px solid var(--border-strong); padding-block-start: 16px; }
.plate-idx-h { margin: 0 0 8px; color: var(--text-3); font-size: .75rem; font-weight: 700; letter-spacing: .12em; text-transform: uppercase; line-height: 1.4; }
html[lang="ar"] .plate-idx-h { letter-spacing: 0; font-size: .875rem; line-height: 1.6; }
.plate-idx ol { display: grid; margin: 0; padding: 0; list-style: none; column-gap: 40px; }
.plate-idx a {
  display: grid; grid-template-columns: 2.25rem minmax(0, 1fr); align-items: baseline; gap: 8px;
  min-height: 44px; padding-block: 10px; border-block-end: var(--hair);
  color: var(--text-1); text-decoration: none; font-weight: 500; line-height: 1.35;
}
.plate-idx a:hover { color: var(--accent-text); }
.plate-idx a:hover .ix-t { text-decoration: underline; text-underline-offset: .2em; }
.ix-n { font-family: "Inter", "Inter Fallback", sans-serif; color: var(--accent-text); font-weight: 700; font-size: .875rem; font-variant-numeric: tabular-nums; }
.plate-foot { position: relative; z-index: 1; display: grid; gap: 20px; }
.colo { display: flex; flex-wrap: wrap; gap: 10px 28px; margin: 0; padding-block-start: 16px; border-block-start: var(--hair); font-size: .875rem; }
.colo div { display: flex; flex-direction: column; gap: 2px; }
.colo dt { color: var(--text-3); font-size: .75rem; font-weight: 600; }
.colo dd { margin: 0; color: var(--text-1); font-weight: 600; }
.colo a { display: inline-flex; min-height: 24px; align-items: center; }
.paths-h, .rail-sub { margin: 0 0 8px; color: var(--text-2); font-size: .8125rem; font-weight: 700; }
.pbtns { display: flex; flex-wrap: wrap; gap: 8px; }
.pbtn {
  display: inline-flex; align-items: center; gap: 8px; min-height: 40px; padding: 0 14px;
  border: 1px solid var(--border-strong); border-radius: 999px; background: var(--bg); color: var(--text-1);
  font: inherit; font-size: .875rem; font-weight: 600; cursor: pointer;
  transition: background-color var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease);
}
.pbtn:hover { border-color: var(--accent-border); }
.pbtn-m { color: var(--text-3); font-weight: 500; font-size: .8125rem; }
.pbtn[aria-pressed="true"] { background: var(--accent-fill); border-color: var(--accent-fill); color: var(--on-accent); }
.pbtn[aria-pressed="true"] .pbtn-m { color: inherit; }
@media (min-width: 700px) { .plate-idx ol { grid-template-columns: 1fr 1fr; } }
@media (min-width: 960px) {
  .plate-in {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, .8fr); column-gap: 56px; row-gap: 36px;
    min-height: min(900px, calc(100svh - var(--topbar-h) - 44px)); align-content: center;
    padding-block: 56px 40px;
  }
  .plate-title { grid-column: 1; grid-row: 1; align-self: end; }
  .plate-motif { position: relative; inset: auto; grid-column: 2; grid-row: 1; width: 100%; max-width: 520px; opacity: 1; align-self: center; justify-self: end; }
  .plate-idx, .plate-foot { grid-column: 1 / -1; }
  .plate-foot { grid-template-columns: minmax(0, 1fr) auto; align-items: end; }
}

/* ---------- Print-only contents ---------- */
.print-toc { display: none; }

/* ---------- Three-column reading grid ---------- */
.d-grid { max-width: 1400px; margin-inline: auto; padding-inline: var(--gut); font-size: var(--fs-body); }
.d-doc { min-width: 0; max-width: var(--col); container-type: inline-size; line-height: var(--lh-body); }
@media (min-width: 1100px) {
  .d-grid { display: grid; grid-template-columns: 236px minmax(0, 1fr); column-gap: 56px; }
}
@media (min-width: 1280px) {
  .d-grid { grid-template-columns: 256px minmax(0, var(--col)) minmax(220px, 1fr); column-gap: 64px; }
}

/* Contents rail */
.rail { display: none; }
.no-js .rail { display: block; padding-block: 24px 0; }
@media (min-width: 1100px) {
  .rail, .no-js .rail {
    display: block; position: sticky; inset-block-start: var(--topbar-h); align-self: start;
    max-height: calc(100vh - var(--topbar-h)); overflow-y: auto; overscroll-behavior: contain;
    padding-block: 40px 24px; font-size: 1rem; scrollbar-width: thin;
  }
}
.rail:focus { outline: none; }
.rail-h { margin: 0 0 10px; padding-inline-start: 15px; color: var(--text-3); font-size: .75rem; font-weight: 700; letter-spacing: .12em; text-transform: uppercase; }
html[lang="ar"] .rail-h { letter-spacing: 0; font-size: .875rem; }
.toc { margin: 0; padding: 0; list-style: none; }
.toc a {
  display: grid; grid-template-columns: 1.4rem minmax(0, 1fr) auto; gap: 8px; align-items: baseline;
  min-height: 32px; padding: 6px 10px 6px 12px; border-inline-start: 3px solid transparent;
  color: var(--text-2); text-decoration: none; font-size: .875rem; line-height: 1.4;
  border-start-end-radius: 8px; border-end-end-radius: 8px;
}
html[lang="ar"] .toc a { line-height: 1.55; padding-inline: 12px 10px; }
.toc a:hover { color: var(--text-1); background: var(--s2); }
.toc a[aria-current="true"] { color: var(--text-1); font-weight: 600; border-inline-start-color: var(--accent); background: var(--accent-soft); }
.toc-n { color: var(--accent-text); font-weight: 700; font-variant-numeric: tabular-nums; font-family: "Inter", "Inter Fallback", sans-serif; }
.toc-m { color: var(--text-3); font-size: .75rem; white-space: nowrap; }
.toc a[aria-current="true"] .toc-m, .thesis:target .th-x a, .g-i:target .g-tw, .g-i:has(dt:target) .g-tw { color: var(--text-2); }
html[data-path] .toc li[data-paths] a { color: var(--text-3); }
html[data-path] .toc li[data-paths] a .toc-n { color: var(--text-3); }
html[data-path="ceo"] .toc li[data-paths~="ceo"] a,
html[data-path="cfo"] .toc li[data-paths~="cfo"] a,
html[data-path="board"] .toc li[data-paths~="board"] a,
html[data-path="ops"] .toc li[data-paths~="ops"] a { color: var(--text-1); font-weight: 600; }
html[data-path="ceo"] .toc li[data-paths~="ceo"] .toc-n,
html[data-path="cfo"] .toc li[data-paths~="cfo"] .toc-n,
html[data-path="board"] .toc li[data-paths~="board"] .toc-n,
html[data-path="ops"] .toc li[data-paths~="ops"] .toc-n { color: var(--accent-text); }
.rail-paths { margin-block-start: 24px; padding-inline-start: 15px; }
.rail-paths .pbtn { min-height: 32px; padding: 0 10px; font-size: .8125rem; }
.rail-paths .pbtn-m { display: none; }
.rail-foot { display: grid; gap: 8px; justify-items: start; margin-block-start: 24px; padding-inline-start: 15px; }
.rail-res { margin: 0; color: var(--text-2); font-size: .8125rem; }
.rail-foot .btn { min-height: 36px; }

/* Results dock */
.dock { display: none; }
@media (min-width: 1280px) {
  .dock {
    display: block; position: sticky; inset-block-start: calc(var(--topbar-h) + 40px); align-self: start;
    margin-block-start: 40px; padding: 20px; max-width: 300px;
    background: var(--s1); border: var(--hair); border-radius: var(--r-lg); font-size: 1rem;
  }
}
.dock-h { margin: 0; font-size: 1rem; line-height: 1.4; }
.dock-n { margin: 2px 0 12px; color: var(--text-2); font-size: .8125rem; }
.dock-list { margin: 0 0 16px; padding: 0; list-style: none; }
.dock-list li { display: flex; align-items: center; justify-content: space-between; gap: 8px; min-height: 36px; border-block-end: var(--hair); font-size: .8125rem; }
.dock-list a { color: var(--text-1); text-decoration: none; }
.dock-list a:hover { text-decoration: underline; }
.dchip[data-v=""] { font-size: 0; width: 10px; height: 10px; padding: 0; border: 1.5px solid var(--border-strong); }
.dchip { flex: none; padding: 2px 8px; border-radius: 999px; color: var(--text-3); font-size: .75rem; font-weight: 600; }
.dchip[data-v="ok"] { background: var(--accent-soft); color: var(--accent-text); }
.dchip[data-v="watch"] { background: var(--warning-soft); color: var(--warning); }
.dchip[data-v="act"] { background: var(--danger-soft); color: var(--danger); }
.dock-btns { display: flex; flex-wrap: wrap; gap: 8px; }
.dock-note { margin: 12px 0 0; color: var(--text-3); font-size: .75rem; line-height: 1.5; }

/* ---------- Document typography ---------- */
.d-doc > .chapter { position: relative; padding-block: 72px 8px; }
.d-doc > .front { padding-block-start: 48px; }
.d-doc p { margin: 0 0 1.1em; text-wrap: pretty; }
.d-doc ul, .d-doc ol { margin: 0 0 1.3em; padding-inline-start: 1.3em; }
.d-doc li { margin-block-end: .45em; }
.d-doc li::marker { color: var(--accent-text); font-weight: 600; }
.d-doc strong { color: var(--text-1); }
.d-doc a { text-decoration-thickness: 1px; }
.hx { display: flex; align-items: baseline; gap: 6px; }
.hx > h2, .hx > h3 { min-width: 0; }
.anc {
  flex: none; display: inline-grid; place-items: center; width: 32px; height: 32px; margin: 0; padding: 0;
  border: 0; border-radius: 8px; background: transparent; color: var(--text-3); cursor: pointer;
  opacity: 0; transition: opacity var(--t-fast) var(--ease);
  align-self: center;
}
.anc .icon { width: 16px; height: 16px; }
.hx:hover .anc, .fig:hover .anc, .g-i:hover .anc, .anc:focus-visible { opacity: 1; }
.anc:hover { color: var(--accent-text); background: var(--s2); }
@media (hover: none) { .anc { display: none; } }
.ch-head { position: relative; margin-block-end: 28px; padding-block-start: 24px; border-block-start: 1px solid var(--border-strong); }
.ch-ghost {
  position: absolute; z-index: -1; inset-block-start: -28px; inset-inline-end: 0;
  font-family: "Inter", "Inter Fallback", sans-serif; font-size: 6rem; font-weight: 700; line-height: 1;
  color: var(--border-strong); opacity: .55; letter-spacing: -.04em; user-select: none;
}
.ch-meta {
  display: flex; align-items: center; margin: 0 0 10px;
  color: var(--accent-text); font-size: .8125rem; font-weight: 700; letter-spacing: .08em; text-transform: uppercase;
}
html[lang="ar"] .ch-meta { letter-spacing: 0; font-size: .875rem; }
.ch-head h2 { margin: 0; font-size: clamp(1.6rem, 1.25rem + 1.2vw, 2.1rem); line-height: 1.2; font-weight: 700; letter-spacing: -.02em; text-wrap: balance; }
html[lang="ar"] .ch-head h2 { line-height: 1.45; letter-spacing: 0; }
.ch-num { color: var(--text-3); font-weight: 600; }
.fm-h2 { margin: 2em 0 .6em; font-size: 1.375rem; line-height: 1.3; }
.hx--fm:first-child .fm-h2 { margin-block-start: 0; }
html[lang="ar"] .fm-h2 { line-height: 1.55; }
.sub-h { margin: 2.2em 0 .7em; font-size: 1.25rem; line-height: 1.35; font-weight: 650; }
html[lang="ar"] .sub-h { line-height: 1.6; font-weight: 700; }
.hx--3 { margin: 0; }
.front > p:first-of-type { font-size: 1.125em; color: var(--text-1); }
.d-doc a.term { color: inherit; text-decoration: underline dotted var(--accent); text-decoration-thickness: 1.5px; text-underline-offset: .28em; }
.d-doc a.term:hover { color: var(--accent-text); }
.d-doc a.xref { font-weight: 600; text-decoration: none; }
.d-doc a.xref:hover { text-decoration: underline; }
.m { padding: .05em .35em; border-radius: 5px; background: var(--s2); color: var(--text-1); font-variant-numeric: tabular-nums; box-decoration-break: clone; -webkit-box-decoration-break: clone; }
sub { font-size: .68em; line-height: 0; }
.m.nw, .d-doc a.xref bdi, .g-back { white-space: nowrap; }
.g-i, .gloss dd, .gloss dt { min-width: 0; overflow-wrap: anywhere; }
.cite { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 16px; margin: 1.2em 0 0; padding: 14px 16px; border: var(--hair); border-radius: var(--r); background: var(--s1); font-size: .9375rem; }
.cite p { flex: 1 1 22rem; margin: 0; color: var(--text-2); overflow-wrap: anywhere; }
.cite .btn { gap: 6px; }
.cite .btn .icon, .dock-btns .icon, .rail-foot .icon { width: 16px; height: 16px; }

/* Equations */
.eq {
  margin: 1.5em 0; padding: 18px 20px; border: var(--hair); border-inline-start: 3px solid var(--accent);
  border-radius: var(--r); background: var(--s1); color: var(--text-1);
  font-size: 1.0625em; font-weight: 600; line-height: 1.55; text-align: center; font-variant-numeric: tabular-nums;
}
.eq--def { text-align: start; font-weight: 500; }
.eq--def .eq-l { font-weight: 700; }
.eqs { list-style: none; padding: 0 !important; margin: 1.4em 0 !important; border-block-start: var(--hair); }
.eqs li { display: grid; gap: 2px 16px; margin: 0; padding: 12px 0; border-block-end: var(--hair); }
.eqs .eq-l { color: var(--text-1); font-weight: 700; }
.eqs .eq-r { color: var(--text-2); font-variant-numeric: tabular-nums; }
@container (min-width: 520px) { .eqs li { grid-template-columns: minmax(0, 13em) minmax(0, 1fr); } }

/* ---------- Theses ---------- */
.theses { list-style: none; margin: 8px 0 0 !important; padding: 0 !important; border-block-start: 1px solid var(--border-strong); }
.thesis {
  display: grid; grid-template-columns: 3.1rem minmax(0, 1fr); gap: 4px 14px;
  margin: 0 !important; padding: 20px 0; border-block-end: var(--hair);
}
.th-n {
  font-family: "Inter", "Inter Fallback", sans-serif; font-size: 2.1rem; font-weight: 700; line-height: 1.05;
  color: var(--accent-text); letter-spacing: -.04em; font-variant-numeric: tabular-nums;
}
.th-b { min-width: 0; }
.th-t { margin: 0 !important; color: var(--text-2); font-size: 1.125rem; line-height: 1.45; }
html[lang="ar"] .th-t { line-height: 1.75; }
.th-t strong { color: var(--text-1); font-weight: 650; }
html[lang="ar"] .th-t strong { font-weight: 700; }
.th-x { margin: 8px 0 0 !important; font-size: .8125rem; line-height: 1.5; }
.th-x a { color: var(--text-3); text-decoration: none; }
.th-x a:hover { color: var(--accent-text); text-decoration: underline; }
.th-a { grid-column: 2; display: flex; gap: 4px; margin-block-start: 6px; }
.sh {
  display: inline-grid; place-items: center; width: 40px; height: 40px; padding: 0; border: 1px solid var(--border);
  border-radius: 50%; background: var(--bg); color: var(--text-2); cursor: pointer;
}
.sh .icon { width: 18px; height: 18px; }
.sh:hover { color: var(--text-1); border-color: var(--border-strong); }
.thesis:target { background: linear-gradient(var(--accent-soft), var(--accent-soft)) no-repeat; }
@container (min-width: 560px) {
  .thesis { grid-template-columns: 4.4rem minmax(0, 1fr) auto; padding: 24px 0; }
  .th-n { font-size: 3rem; }
  .th-t { font-size: 1.375rem; line-height: 1.35; }
  html[lang="ar"] .th-t { font-size: 1.3125rem; line-height: 1.7; }
  .th-a { grid-column: 3; grid-row: 1; margin: 0; align-self: start; opacity: 0; transition: opacity var(--t-fast) var(--ease); }
  .thesis:hover .th-a, .thesis:focus-within .th-a { opacity: 1; }
}
@media (hover: none) { .th-a { opacity: 1 !important; } }

/* ---------- Glossary ---------- */
.gloss { display: grid; column-gap: 40px; margin: 8px 0 0; }
.g-i { padding: 16px 0; border-block-start: var(--hair); break-inside: avoid; }
.g-i dt { display: flex; flex-wrap: wrap; align-items: baseline; gap: 2px 10px; }
.g-i dfn { font-style: normal; font-weight: 700; color: var(--text-1); }
.g-tw { color: var(--text-3); font-size: .8125rem; }
.g-i .anc { width: 28px; height: 28px; }
.g-i dd { margin: 4px 0 0; color: var(--text-2); font-size: .9375em; }
.g-back { font-size: .8125rem; font-weight: 600; text-decoration: none; white-space: nowrap; }
.g-i:target, .g-i:has(dt:target) { background: linear-gradient(var(--accent-soft), var(--accent-soft)); }
@container (min-width: 700px) { .gloss { grid-template-columns: 1fr 1fr; } }

/* ---------- Failure modes ---------- */
.fms { list-style: none; margin: 8px 0 1.5em !important; padding: 0 !important; display: grid; gap: 10px; }
.fm { margin: 0 !important; padding: 14px 16px; border: var(--hair); border-radius: var(--r); background: var(--s1); }
.fm:target { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }
.fm-h { display: flex; gap: 12px; align-items: baseline; margin: 0 0 8px !important; color: var(--text-1); }
.fm-n { font-family: "Inter", "Inter Fallback", sans-serif; color: var(--accent-text); font-weight: 700; font-size: .875rem; font-variant-numeric: tabular-nums; }
.fm dl { display: grid; gap: 8px; margin: 0; }
.fm dt { color: var(--text-3); font-size: .75rem; font-weight: 700; letter-spacing: .04em; text-transform: uppercase; }
html[lang="ar"] .fm dt { letter-spacing: 0; font-size: .8125rem; }
.fm dd { margin: 2px 0 0; color: var(--text-2); font-size: .875rem; line-height: 1.55; }
html[lang="ar"] .fm dd { font-size: .9375rem; line-height: 1.75; }
@container (min-width: 560px) { .fm dl { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; } }

/* ---------- Tables ---------- */
.tbl { margin: 1.5em 0; }
.tbl table { width: 100%; border-collapse: collapse; font-size: .875rem; line-height: 1.5; }
html[lang="ar"] .tbl table { font-size: .9375rem; line-height: 1.7; }
.tbl th, .tbl td { padding: 10px 12px; text-align: start; vertical-align: top; border-block-end: var(--hair); }
.tbl thead th { color: var(--text-2); font-size: .75rem; font-weight: 700; letter-spacing: .04em; text-transform: uppercase; border-block-end: 1px solid var(--border-strong); }
html[lang="ar"] .tbl thead th { letter-spacing: 0; font-size: .8125rem; }
.tbl tbody th { color: var(--text-1); font-weight: 600; }
.tbl td { color: var(--text-2); font-variant-numeric: tabular-nums; }
.tbl tr:target > * { background: var(--accent-soft); }
@container (max-width: 559px) {
  .tbl thead { display: none; }
  .tbl table, .tbl tbody, .tbl tr, .tbl th, .tbl td { display: block; }
  .tbl tr { margin-block-end: 10px; padding: 10px 14px; border: var(--hair); border-radius: var(--r); background: var(--s1); }
  .tbl th, .tbl td { padding: 3px 0; border: 0; }
  .tbl td { display: grid; grid-template-columns: minmax(0, 7.5em) minmax(0, 1fr); gap: 10px; }
  .tbl td::before { content: attr(data-label); color: var(--text-3); font-size: .75rem; font-weight: 700; line-height: 1.9; }
  html[lang="ar"] .tbl td::before { font-size: .8125rem; line-height: 2.1; }
}

/* ---------- Callouts ---------- */
.co { position: relative; margin: 1.6em 0; padding: 16px 20px; border-radius: var(--r); font-size: .96em; }
.co p:last-child { margin-block-end: 0; }
.co-l {
  display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin: 0 0 6px !important;
  font-size: .75rem; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; line-height: 1.4;
}
html[lang="ar"] .co-l { letter-spacing: 0; font-size: .875rem; line-height: 1.6; }
.co-l .icon { width: 18px; height: 18px; }
.co-b { margin: 0 !important; }
.eq--in { margin: 12px 0 !important; padding: 12px 16px; border: 0; background: var(--bg); font-size: 1rem; }
.co-b2 { margin-block-start: 0 !important; }
/* Principle: filled, accent rule, numbered, larger text */
.co--pr { padding: 20px 64px 20px 22px; background: var(--accent-soft); border-inline-start: 4px solid var(--accent); border-radius: 0 var(--r) var(--r) 0; }
html[dir="rtl"] .co--pr { padding: 20px 22px 20px 64px; border-radius: var(--r) 0 0 var(--r); } /* RTL mirror of the physical radii/padding */
.co--pr .co-l { color: var(--accent-text); }
.co--pr .co-b { color: var(--text-1); font-size: 1.125em; font-weight: 600; line-height: 1.5; }
html[lang="ar"] .co--pr .co-b { line-height: 1.8; }
.co-num { position: absolute; inset-block-start: 12px; inset-inline-end: 18px; font-family: "Inter", "Inter Fallback", sans-serif; font-size: 2.75rem; font-weight: 700; line-height: 1; color: var(--accent-border); }
/* Decision rule: bordered box, square start, arrow */
.co--rule { background: var(--info-soft); border: 1px solid var(--info); border-inline-start-width: 4px; border-radius: 4px; }
.co--rule .co-l { color: var(--info); color: color-mix(in srgb, var(--info) 78%, var(--text-1)); } /* 4.2:1 -> >= 4.5:1 where the fixed glow tints the box in dark mode */
html[dir="rtl"] .co--rule .co-l .icon { transform: scaleX(-1); }
.co--rule .co-b { color: var(--text-1); }
/* Common mistake: no fill, cross, danger rule */
.co--mis { padding-block: 8px; padding-inline: 18px 0; border-inline-start: 4px double var(--danger); border-radius: 0; background: transparent; }
.co--mis .co-l { color: var(--danger); }
.co--mis .co-b { color: var(--text-2); }
/* Illustrative example: dashed, neutral, stamped */
.co--ex { padding: 18px 20px; border: 1.5px dashed var(--border-strong); background: var(--s1); }
.co--ex .co-l { color: var(--text-2); }
.stamp {
  margin-inline-start: auto; padding: 2px 10px; border: 1.5px solid var(--warning); border-radius: 4px;
  color: var(--warning); font-size: .6875rem; letter-spacing: .08em; transform: rotate(-2deg);
}
html[lang="ar"] .stamp { font-size: .8125rem; letter-spacing: 0; transform: rotate(2deg); }
.co--ex ul { margin-block-end: .8em; }
.co--ex .tbl { margin-block: .8em 0; }
/* Evidence: solid frame, gold top rule, verified */
.evs { display: grid; gap: 14px; margin: 1em 0 0; }
@container (min-width: 600px) { .evs { grid-template-columns: 1fr 1fr; } }
.co--ev { margin: 0; padding: 16px 18px; background: var(--s1); border: 1px solid var(--border-strong); border-block-start: 3px solid var(--gold); display: flex; flex-direction: column; }
.co--ev .co-l { color: var(--gold); }
.ver { display: inline-flex; align-items: center; gap: 4px; margin-inline-start: auto; padding: 1px 8px; border-radius: 999px; background: var(--gold-soft); color: var(--gold); letter-spacing: 0; text-transform: none; font-size: .75rem; }
.ver .icon { width: 14px; height: 14px; }
.ev-h { margin: 4px 0 2px; font-size: 1.0625rem; line-height: 1.35; }
html[lang="ar"] .ev-h { line-height: 1.6; }
.ev-refs { margin: 0 0 8px !important; color: var(--text-3); font-size: .8125rem; }
.co--ev .co-b { color: var(--text-2); font-size: .9375rem; flex: 1; }
.co-src { margin: 10px 0 0 !important; padding-block-start: 8px; border-block-start: var(--hair); color: var(--text-3); font-size: .75rem; }
.ev-note { color: var(--text-3); font-size: .875rem; }

/* Pull quotes */
.pq { margin: 2.2em 0; }
.pq blockquote { margin: 0; padding-inline-start: 22px; border-inline-start: 3px solid var(--accent); }
.pq p { position: relative; margin: 0 !important; color: var(--text-1); font-size: clamp(1.3125rem, 1.15rem + .6vw, 1.5rem); font-weight: 600; line-height: 1.4; letter-spacing: -.01em; text-wrap: balance; }
html[lang="ar"] .pq p { line-height: 1.65; letter-spacing: 0; }

/* Weeks (30-day plan) */
.weeks { list-style: none; padding: 0 !important; display: grid; gap: 10px; }
.weeks li { margin: 0; padding: 14px 16px; border: var(--hair); border-radius: var(--r); background: var(--s1); color: var(--text-2); }
.weeks li > strong:first-child { display: block; color: var(--text-1); }
.weeks em { display: block; margin-block-start: 6px; color: var(--accent-text); font-style: normal; font-weight: 600; }

/* Manifesto + CTA */
.mani { margin: 8px 0 0; border-block-start: 1px solid var(--border-strong); }
.mani p { margin: 0 !important; padding: 14px 0; border-block-end: var(--hair); color: var(--text-1); font-size: clamp(1.1875rem, 1.05rem + .55vw, 1.4375rem); font-weight: 600; line-height: 1.45; }
html[lang="ar"] .mani p { line-height: 1.75; }
.mani-tag { margin: 28px 0 !important; color: var(--accent-text); font-size: clamp(1.5rem, 1.2rem + 1vw, 2rem); font-weight: 700; line-height: 1.3; }
html[lang="ar"] .mani-tag { line-height: 1.6; }
.cta-row { margin: 20px 0 8px !important; }
.cta-row .btn { white-space: normal; text-align: center; }
.endmark { margin: 56px 0 0 !important; padding-block-start: 16px; border-block-start: var(--hair); color: var(--text-3); font-size: .8125rem; }

/* Next stop (reading paths) */
.next-stop {
  display: inline-flex; align-items: center; gap: 8px; min-height: 44px; margin-block-start: 28px; padding: 8px 18px;
  border-radius: 999px; background: var(--accent-soft); color: var(--accent-text) !important; font-size: .9375rem; font-weight: 600; text-decoration: none !important;
}
.next-stop:hover { background: var(--accent-fill); color: var(--on-accent) !important; }

/* ---------- Figures ---------- */
.fig { margin: 2em 0; }
.fig-art { padding: 16px 12px; border: var(--hair); border-radius: var(--r-lg); background: var(--s1); }
.dg { display: block; width: 100%; max-width: 460px; height: auto; margin-inline: auto; direction: ltr; overflow: visible; font-family: var(--font-sans); }
.fig--tall .dg { max-width: 400px; }
.fig figcaption { display: block; margin-block-start: 10px; color: var(--text-2); font-size: .875rem; line-height: 1.55; }
html[lang="ar"] .fig figcaption { font-size: .9375rem; line-height: 1.75; }
.fig figcaption strong { color: var(--text-1); }
.fig-n { color: var(--accent-text); font-size: .75rem; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; margin-inline-end: 4px; }
html[lang="ar"] .fig-n { letter-spacing: 0; font-size: .8125rem; }
.fig figcaption .anc { display: inline-grid; vertical-align: middle; width: 28px; height: 28px; }
.fig-data { margin-block-start: 8px; font-size: .875rem; }
.fig-data summary { display: inline-flex; align-items: center; min-height: 32px; color: var(--accent-text); font-weight: 600; cursor: pointer; }
.dtab { width: 100%; margin-block-start: 8px; border-collapse: collapse; }
.dtab th, .dtab td { padding: 8px 10px; border-block-end: var(--hair); text-align: start; vertical-align: top; }
.dtab thead th { color: var(--text-2); font-size: .75rem; }
.dtab td { color: var(--text-2); font-variant-numeric: tabular-nums; }
/* SVG vocabulary */
.dg .t { fill: var(--text-2); font-size: 16px; }
.dg .ts { font-size: 14px; }
.dg .tb { fill: var(--text-1); font-weight: 600; }
.dg .tn { fill: var(--text-1); font-size: 15px; font-weight: 700; font-family: "Inter", "Inter Fallback", sans-serif; }
.dg .acc { fill: var(--accent-text); }
.dg .dn { fill: var(--danger); }
.dg .it { font-style: italic; }
html[lang="ar"] .dg .it { font-style: normal; }
.dg .on { fill: var(--text-1); }
.dg .sub { font-size: 11px; }
.dg .ax { stroke: var(--border-strong); stroke-width: 1.2; }
.dg .z1 { fill: var(--accent-soft); }
.dg .z2 { fill: none; stroke: var(--accent-border); stroke-dasharray: 5 4; }
.dg .z3 { fill: var(--danger-soft); }
.dg .curve { fill: none; stroke: var(--accent); stroke-width: 3.5; stroke-linecap: round; }
.dg .drop { stroke: var(--text-3); stroke-width: 1.2; stroke-dasharray: 4 4; }
.dg .dot { fill: var(--accent); stroke: var(--s1); stroke-width: 3; }
.dg .box { fill: var(--s2); stroke: var(--border-strong); stroke-width: 1.2; }
.dg .gate { fill: var(--bg); }
.dg .pill { fill: var(--s2); }
.dg .dia { fill: var(--accent-soft); stroke: var(--accent); stroke-width: 1.5; }
.dg .nogo { fill: var(--danger-soft); stroke: var(--danger); }
.dg .go { fill: var(--accent-soft); stroke: var(--accent); }
.dg .mid { fill: var(--warning-soft); stroke: var(--warning); }
.dg .flow { fill: none; stroke: var(--text-2); stroke-width: 1.5; }
.dg .flow.no { stroke: var(--danger); }
.defs .mk { fill: var(--text-2); }
.defs .mk-no { fill: var(--danger); }
.defs .hl { stroke: #000; stroke-width: 1; }
.defs .hd { fill: #000; }
.dg .bar.tot { fill: var(--s2); stroke: var(--border-strong); }
.dg .bar.neg { fill: var(--danger-soft); stroke: var(--danger); stroke-width: 1; }
.dg .bar.pos { fill: var(--accent); }
.dg .conn { stroke: var(--border-strong); stroke-dasharray: 2 3; }
.dg .floor { stroke: var(--accent-text); stroke-width: 1.5; stroke-dasharray: 6 4; }
.dg .ring { fill: none; stroke: var(--border-strong); stroke-width: 1.2; }
.dg .core { fill: var(--accent-soft); stroke: var(--accent); }
.dg .chip { fill: var(--bg); stroke: var(--accent); stroke-width: 2; }
.dg .chip.c1 { stroke: var(--info); }
.dg .chip.c2 { stroke: var(--warning); }
.dg .chip.hot { fill: var(--danger-soft); stroke: var(--danger); }
.dg .rlab { fill: var(--s1); stroke: var(--border-strong); }
.dg .q.prio { fill: var(--danger-soft); }
.dg .qf { fill: none; stroke: var(--border); }
.dg a.chipa { cursor: pointer; }
.dg a.chipa:hover .chip, .dg a.chipa:focus .chip { stroke-width: 3.5; }
.dg a.chipa:focus { outline: none; }
.dg a.chipa:focus-visible .chip { stroke: var(--text-1); stroke-width: 3.5; }

/* ---------- Tools ---------- */
.tool { margin: 2em 0; border: 1px solid var(--border-strong); border-radius: var(--r-lg); background: var(--s1); font-size: 1rem; line-height: 1.55; }
details.tool > summary {
  display: flex; align-items: center; gap: 14px; min-height: 64px; padding: 14px 18px;
  list-style: none; cursor: pointer; border-radius: var(--r-lg);
}
details.tool > summary::-webkit-details-marker { display: none; }
details.tool > summary:hover .t-name { color: var(--accent-text); }
.t-ico { flex: none; display: grid; place-items: center; width: 40px; height: 40px; border-radius: 12px; background: var(--accent-soft); color: var(--accent-text); }
.t-sum { flex: 1; min-width: 0; display: flex; flex-direction: column; }
.t-kick { display: flex; align-items: center; flex-wrap: wrap; color: var(--accent-text); font-size: .8125rem; font-weight: 600; }
.t-name { color: var(--text-1); font-size: 1.0625rem; font-weight: 700; line-height: 1.35; }
.t-chev { flex: none; color: var(--text-3); transition: transform var(--t-med) var(--ease); }
html[dir="rtl"] .t-chev { transform: scaleX(-1); }
details.tool[open] > summary .t-chev { transform: rotate(90deg); }
details.tool[open] > summary { border-block-end: var(--hair); border-end-start-radius: 0; border-end-end-radius: 0; }
.t-body { display: grid; gap: 18px; padding: 18px; }
@container (min-width: 600px) {
  .t-body { grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr); align-items: start; }
  .t-how { grid-column: 1 / -1; }
  .t-out { position: sticky; inset-block-start: calc(var(--topbar-h) + 16px); }
}
.t-form { display: grid; gap: 14px; min-width: 0; }
.fs { display: grid; gap: 14px; margin: 0; padding: 0; border: 0; min-width: 0; }
.fs + .fs { padding-block-start: 14px; border-block-start: var(--hair); }
.fs legend { padding: 0; margin-block-end: 10px; color: var(--text-2); font-size: .75rem; font-weight: 700; letter-spacing: .06em; text-transform: uppercase; }
html[lang="ar"] .fs legend { letter-spacing: 0; font-size: .875rem; }
.fld { min-width: 0; }
.fld label { display: block; margin-block-end: 6px; color: var(--text-1); font-size: .875rem; font-weight: 600; line-height: 1.4; }
.inp { display: flex; align-items: center; border: 1px solid var(--border-strong); border-radius: 10px; background: var(--bg); transition: border-color var(--t-fast) var(--ease); }
.inp:focus-within { border-color: var(--accent-text); outline: 2px solid var(--accent-text); outline-offset: 1px; }
.inp input {
  flex: 1; min-width: 0; min-height: 44px; margin: 0; padding: 8px 12px; border: 0; background: transparent;
  color: var(--text-1); font: inherit; font-family: "Inter", "Inter Fallback", sans-serif; font-size: 1rem; font-weight: 600; font-variant-numeric: tabular-nums;
}
.inp input:focus { outline: none; }
html[dir="rtl"] .inp input { text-align: right; }
.unit { flex: none; padding-inline: 4px 12px; color: var(--text-3); font-size: .8125rem; white-space: nowrap; }
.inp:has(input[aria-invalid="true"]) { border-color: var(--danger); }
.hint { margin: 6px 0 0 !important; color: var(--text-2); font-size: .8125rem; line-height: 1.5; }
.ex-tag { display: inline-block; padding: 0 6px; border-radius: 4px; background: var(--s2); color: var(--text-2); font-size: .6875rem; font-weight: 700; letter-spacing: .04em; text-transform: uppercase; vertical-align: 1px; }
html[lang="ar"] .ex-tag { font-size: .75rem; letter-spacing: 0; }
.err { margin: 4px 0 0 !important; color: var(--danger); font-size: .8125rem; font-weight: 600; }
.err:empty { display: none; }
@container (min-width: 600px) {
  #tool-bridge .fs:last-child { grid-template-columns: 1fr 1fr; }
  #tool-bridge .fs:last-child legend { grid-column: 1 / -1; }
}
.t-out { min-width: 0; padding: 18px; border: var(--hair); border-radius: var(--r); background: var(--bg); }
.t-big { margin: 0 0 4px !important; }
.t-big-l { display: block; color: var(--text-2); font-size: .8125rem; font-weight: 600; }
.t-big-v { display: block; color: var(--text-1); font-family: "Inter", "Inter Fallback", sans-serif; font-size: clamp(2rem, 1.6rem + 1.2vw, 2.5rem); font-weight: 700; line-height: 1.2; letter-spacing: -.02em; font-variant-numeric: tabular-nums; overflow-wrap: anywhere; }
html[lang="ar"] .t-big-v { font-family: var(--font-sans); letter-spacing: 0; }
.t-sec { display: grid; gap: 0; margin: 10px 0 12px; }
.t-sec div { display: flex; justify-content: space-between; align-items: baseline; gap: 12px; padding-block: 7px; border-block-start: var(--hair); }
.t-sec dt { color: var(--text-2); font-size: .8125rem; line-height: 1.4; }
.t-sec dd { margin: 0; color: var(--text-1); font-size: .9375rem; font-weight: 700; font-variant-numeric: tabular-nums; text-align: end; white-space: nowrap; }
.chip { margin: 4px 0 0 !important; }
.chip[data-v=""] { display: none; }
.chip-i { display: none; align-items: center; gap: 6px; padding: 4px 12px 4px 10px; border-radius: 999px; font-size: .875rem; font-weight: 700; }
.chip-i .icon { width: 16px; height: 16px; stroke-width: 2.5; }
.chip[data-v="ok"] .chip-ok { display: inline-flex; background: var(--accent-soft); color: var(--accent-text); }
.chip[data-v="watch"] .chip-watch { display: inline-flex; background: var(--warning-soft); color: var(--warning); }
.chip[data-v="act"] .chip-act { display: inline-flex; background: var(--danger-soft); color: var(--danger); }
.t-act { margin: 8px 0 14px !important; color: var(--text-1); font-size: .9375rem; line-height: 1.55; }
.t-save:disabled { opacity: .5; cursor: not-allowed; }
.t-save.is-saved { border-color: var(--accent); color: var(--accent-text); }
.gauge { position: relative; display: flex; height: 10px; margin: 12px 0 26px; border-radius: 5px; }
.g-z { height: 100%; }
.g1 { flex: 0 0 50%; background: var(--accent); border-start-start-radius: 5px; border-end-start-radius: 5px; opacity: .55; }
.g2 { flex: 0 0 33.34%; background: var(--warning); opacity: .55; }
.g3 { flex: 1; background: var(--danger); border-start-end-radius: 5px; border-end-end-radius: 5px; opacity: .55; }
.g-m { position: absolute; inset-block-start: -5px; inset-inline-start: 0; width: 4px; height: 20px; margin-inline-start: -2px; border-radius: 2px; background: var(--text-1); box-shadow: 0 0 0 2px var(--bg); transition: inset-inline-start var(--t-med) var(--ease); }
.g-m.is-none { display: none; }
.g-l { position: absolute; inset-block-start: 14px; color: var(--text-3); font-size: .6875rem; font-variant-numeric: tabular-nums; transform: translateX(-50%); }
html[dir="rtl"] .g-l { transform: translateX(50%); }
.g18 { inset-inline-start: 50%; }
.g30 { inset-inline-start: 83.34%; }
.g36 { inset-inline-start: 100%; transform: translateX(-100%) !important; }
html[dir="rtl"] .g36 { transform: translateX(100%) !important; }
.t-how { border-block-start: var(--hair); padding-block-start: 10px; }
.t-how > summary { display: inline-flex; align-items: center; gap: 6px; min-height: 36px; color: var(--accent-text); font-size: .875rem; font-weight: 600; cursor: pointer; }
.no-js .t-how > summary { display: none; }
.how { font-size: .875rem; }
html[lang="ar"] .how { font-size: .9375rem; }
.how-h { margin: 12px 0 6px !important; color: var(--text-2); font-size: .75rem; font-weight: 700; letter-spacing: .06em; text-transform: uppercase; }
html[lang="ar"] .how-h { letter-spacing: 0; font-size: .8125rem; }
.fx { margin: 0 0 6px !important; padding: 8px 12px; border-radius: 8px; background: var(--s2); color: var(--text-1); font-weight: 600; font-variant-numeric: tabular-nums; }
.vars { display: grid; gap: 4px; margin: 0; }
.vars div { display: flex; gap: 10px; }
.vars dt { min-width: 4.5em; color: var(--text-1); font-weight: 700; }
.vars dd { margin: 0; color: var(--text-2); }
.ths { list-style: none; margin: 0 !important; padding: 0 !important; display: grid; gap: 6px; }
.ths li { margin: 0; color: var(--text-2); }
.th-k { display: inline-block; min-width: 5.5em; margin-inline-end: 6px; padding: 0 8px; border-radius: 999px; font-size: .75rem; font-weight: 700; text-align: center; }
.th-ok .th-k { background: var(--accent-soft); color: var(--accent-text); }
.th-watch .th-k { background: var(--warning-soft); color: var(--warning); }
.th-act .th-k { background: var(--danger-soft); color: var(--danger); }
.how-note { margin: 10px 0 0 !important; color: var(--text-3); font-size: .8125rem; }
/* Checklist */
.tool--check { padding: 6px 18px 18px; }
.checklist { margin: 0 !important; padding-inline-start: 1.4em !important; }
.checklist li { margin: 0; border-block-end: var(--hair); }
.checklist li::marker { color: var(--text-3); font-size: .875em; }
.ck { display: flex; align-items: flex-start; gap: 12px; padding: 12px 0; cursor: pointer; color: var(--text-1); }
.ck input { flex: none; width: 22px; height: 22px; margin: .2em 0 0; accent-color: var(--accent-fill); cursor: pointer; }
.ck-box { display: none; }
.t-out--check { display: grid; grid-template-columns: auto 1fr; align-items: center; gap: 4px 20px; margin-block-start: 16px; }
.t-out--check .t-big { grid-row: span 3; }
.t-out--check .t-act { margin: 0 !important; }
.t-out--check .t-save { justify-self: start; }

/* ---------- Mobile contents sheet ---------- */
.sheet {
  position: fixed; inset: auto 0 0; width: 100%; max-width: 640px; max-height: 88vh; margin: 0 auto; padding: 0;
  border: 0; border-radius: 20px 20px 0 0; background: var(--s1); color: var(--text-1);
  box-shadow: 0 -12px 40px rgba(0, 0, 0, .35);
}
.sheet::backdrop { background: rgba(0, 0, 0, .5); }
.sheet-in { max-height: 88vh; overflow-y: auto; padding: 0 16px 24px; overscroll-behavior: contain; }
.sheet-top { position: sticky; inset-block-start: 0; z-index: 1; display: flex; align-items: center; justify-content: space-between; padding-block: 10px; background: var(--s1); border-block-end: var(--hair); }
.sheet-h { margin: 0; font-size: 1.0625rem; }
.sheet .toc { margin-block: 8px; }
.sheet .toc a { min-height: 44px; align-items: center; font-size: .9375rem; }
.sheet-sec { padding-block: 14px; border-block-start: var(--hair); }
.sheet .rail-sub { display: flex; gap: 8px; }
@media (prefers-reduced-motion: no-preference) {
  .sheet[open] { animation: sheet-in var(--t-med) var(--ease); }
  @keyframes sheet-in { from { transform: translateY(24px); opacity: 0; } to { transform: none; opacity: 1; } }
}

/* ---------- Toast, back to top ---------- */
.toast {
  position: fixed; z-index: 1200; inset-inline: 16px; inset-block-end: 20px; width: fit-content; max-width: calc(100% - 32px); margin-inline: auto;
  padding: 10px 18px; border-radius: 999px; background: var(--text-1); color: var(--bg);
  font-size: .9375rem; font-weight: 600; pointer-events: none; opacity: 0; transform: translateY(8px);
  transition: opacity var(--t-med) var(--ease), transform var(--t-med) var(--ease);
}
.toast.show { opacity: 1; transform: none; }
.toast:empty { padding: 0; }
.to-top {
  position: fixed; z-index: 900; inset-inline-end: 16px; inset-block-end: 16px; display: grid; place-items: center;
  width: 44px; height: 44px; border: 1px solid var(--border-strong); border-radius: 50%; background: var(--s1); color: var(--text-1);
  box-shadow: 0 4px 16px rgba(0, 0, 0, .12); opacity: 0; visibility: hidden; transition: opacity var(--t-med) var(--ease), visibility var(--t-med);
}
.to-top.show { opacity: 1; visibility: visible; }
.to-top:hover { border-color: var(--accent-border); color: var(--accent-text); }

/* Board brief is print-only */
.brief { display: none; }
.print-foot { display: none; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition-duration: 1ms !important; animation-duration: 1ms !important; }
}
@media (forced-colors: active) {
  .chip-i, .dchip, .pbtn[aria-pressed="true"], .th-k { border: 1px solid CanvasText; }
  .toc a[aria-current="true"] { border-inline-start-color: Highlight; }
}

/* ==========================================================================
   Print / PDF edition (A4)
   ========================================================================== */
@media print {
  @page { size: A4; margin: 20mm 18mm 22mm; }
  @page cover { margin: 0; }
  @page brief { margin: 16mm 16mm 18mm; }
  html { scroll-padding: 0; }
  body { font-size: 10.5pt; line-height: 1.5; }
  html[lang="ar"] body { line-height: 1.75; }
  .skip-link, .d-wrap, .d-top, .rail, .dock, .sheet, .toast, .to-top, .anc, .th-a, .paths, .rail-paths,
  .t-form, .t-out, .t-how > summary, .next-stop, .breadcrumb, .fig-data, .leadin-card .btn, .footer-nav, .author-photo, .cta-row, .cite .btn { display: none !important; }
  .d-main { padding: 0; }
  .d-grid, .d-doc { display: block; max-width: none; padding: 0; font-size: 10.5pt; }
  .d-doc { container-type: normal; }
  /* Cover page: full bleed */
  .plate { page: cover; break-after: page; background: none; border: 0; }
  .plate-in { display: grid; grid-template-columns: 1fr; min-height: 285mm; padding: 22mm 20mm 14mm; align-content: space-between; row-gap: 6mm; }
  .plate-title, .plate-motif, .plate-idx, .plate-foot { grid-column: 1; grid-row: auto; }
  .plate-motif { position: static; width: 120mm; max-width: none; margin: 4mm 0; justify-self: end; opacity: 1; }
  .plate-h1 { font-size: 40pt; }
  .plate-dek { font-size: 14pt; }
  .plate-idx ol { grid-template-columns: 1fr 1fr; }
  .plate-idx a { min-height: 0; padding-block: 5pt; }
  .plate-foot { grid-template-columns: 1fr; }
  .motif .mc { stroke: #999; }
  .motif .mc.on { stroke: #000; }
  /* Contents page */
  .print-toc { display: block; break-after: page; padding-block-start: 10mm; }
  .print-toc h2 { font-size: 20pt; margin: 0 0 10mm; }
  .print-toc ol { list-style: none; margin: 0; padding: 0; }
  .print-toc li { display: flex; gap: 8mm; padding-block: 3.5mm; border-block-end: 0.5pt solid #999; font-size: 13pt; font-weight: 600; }
  .print-toc .toc-n { min-width: 8mm; color: #000; }
  /* Chapters */
  .d-doc > .chapter { padding: 0; break-before: page; }
  .ch-head { border-block-start: 2pt solid #000; padding-block-start: 6mm; margin-block-end: 6mm; }
  .ch-ghost { z-index: 0; color: #ddd; opacity: 1; inset-block-start: 2mm; font-size: 48pt; }
  .ch-head h2 { font-size: 20pt; }
  h2, h3, .hx { break-after: avoid; }
  figure, .fig, .co, .tbl tr, .thesis, .fm, .g-i, .tool, .eq, .eqs li, .weeks li, .pq { break-inside: avoid; }
  p { orphans: 3; widows: 3; }
  a { color: #000; text-decoration: none; }
  .d-doc a.term { text-decoration: none; }
  .theses .thesis { padding: 3mm 0; grid-template-columns: 14mm 1fr; }
  .th-n { font-size: 20pt; }
  .th-t { font-size: 11.5pt; }
  .th-x { display: none; }
  .co, .fm, .tool, .fig-art, .t-out, .co--ev, .weeks li, .tbl tr { background: none !important; box-shadow: none !important; }
  .co--pr { border-inline-start: 3pt solid #000; }
  .co--rule { border-color: #000; }
  .co--mis { border-inline-start-color: #000; }
  .co--ev { border-color: #000; border-block-start-color: #000; }
  .stamp { border-color: #000; color: #000; }
  .pq p::before { color: #000; }
  .evs { grid-template-columns: 1fr 1fr; }
  .fms { gap: 3mm; }
  .fm dl { grid-template-columns: repeat(3, 1fr); }
  .gloss { grid-template-columns: 1fr 1fr; }
  .tbl thead { display: table-header-group; }
  /* Tools print as formula, variables and thresholds */
  details.tool > summary { min-height: 0; padding: 3mm 4mm; border-block-end: 0.5pt solid #000; }
  .t-ico, .t-chev, .t-kick .js-only { display: none; }
  .t-kick .nojs-only { display: inline !important; }
  .t-body { display: block; padding: 3mm 4mm; }
  details.tool::details-content, .t-how::details-content { content-visibility: visible; display: block; }
  .tool--check .checklist input { display: none !important; }
  .tool--check .ck::before { content: ""; flex: none; width: 3.5mm; height: 3.5mm; margin-top: 1mm; border: 0.75pt solid #000; }
  .th-k { border: 0.5pt solid #000; background: none !important; color: #000 !important; }
  .fx { background: none; border: 0.5pt solid #999; }
  /* Diagrams: ink only, tints become hatching */
  .fig-art { border: 0.5pt solid #999; padding: 3mm; }
  .dg .z1, .dg .go, .dg .core, .dg .dia { fill: url(#hatch2); }
  .dg .z3, .dg .q.prio, .dg .nogo, .dg .chip.hot, .dg .bar.neg { fill: url(#hatch); }
  .dg .mid { fill: #eee; }
  .dg .bar.pos { fill: #000; }
  .dg .z2, .dg .ax, .dg .box, .dg .ring, .dg .chip, .dg .rlab, .dg .flow, .dg .drop, .dg .conn, .dg .floor { stroke: #000; }
  .dg .t, .dg .tb, .dg .acc, .dg .dn, .dg .tn { fill: #000; }
  .dg .curve { stroke: #000; }
  .dg .dot { fill: #000; stroke: #fff; }
  .defs .mk, .defs .mk-no { fill: #000; }
  .endmark { break-inside: avoid; }
  .pub-footer { break-before: page; }
  /* Board brief mode */
  body.printing-brief > *:not(#board-brief) { display: none !important; }
  body.printing-brief .brief { display: block !important; page: brief; }
  .brief h2 { margin: 0 0 2mm; font-size: 18pt; }
  .brief .b-sub { margin: 0 0 4mm; color: #333; font-size: 10pt; }
  .brief .b-meta { display: flex; gap: 10mm; margin: 0 0 5mm; font-size: 9.5pt; }
  .brief table { width: 100%; border-collapse: collapse; font-size: 9pt; }
  .brief th, .brief td { padding: 2mm 2.5mm; border: 0.5pt solid #888; text-align: start; vertical-align: top; }
  .brief thead th { background: #eee; }
  .brief ul { margin: 0; padding-inline-start: 4mm; }
  .brief h3 { margin: 6mm 0 2mm; font-size: 12pt; }
  .brief ol { margin: 0; padding-inline-start: 5mm; font-size: 9.5pt; }
  .brief .b-foot { margin-block-start: 6mm; padding-block-start: 2mm; border-block-start: 0.5pt solid #888; color: #333; font-size: 8.5pt; }
  .brief .b-v { font-weight: 700; }
}

/* PLAN m-13: long chapters render lazily (off-screen sections are skipped until they approach the viewport); anchors and print are unaffected */
@media screen { .d-doc section.chapter:not(.front) { content-visibility: auto; contain-intrinsic-size: auto 800px; } }