/* ==========================================================================
   seiflden.com v3 - Publications (Doctrine + Playbook, EN/AR)
   Shared stylesheet for doctrine_{en,ar}.html and playbook_{en,ar}.html.
   Tokens mirror the site visual system (brief section 4). Logical properties only.
   ========================================================================== */

/* ---------- Fonts (self-hosted, subset by unicode-range) ---------- */
@font-face {
  font-family: "Inter";
  src: url("/assets/fonts/inter-latin.woff2") format("woff2");
  font-weight: 100 900;
  font-style: normal;
  font-display: swap;
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: "IBM Plex Sans Arabic";
  src: url("/assets/fonts/plex-ar-400.woff2") format("woff2");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
  unicode-range: U+0600-06FF, U+0750-077F, U+0870-08FF, U+200C-200F, U+FB50-FDFF, U+FE70-FEFF;
}
@font-face {
  font-family: "IBM Plex Sans Arabic";
  src: url("/assets/fonts/plex-ar-600.woff2") format("woff2");
  font-weight: 500 600;
  font-style: normal;
  font-display: swap;
  unicode-range: U+0600-06FF, U+0750-077F, U+0870-08FF, U+200C-200F, U+FB50-FDFF, U+FE70-FEFF;
}
@font-face {
  font-family: "IBM Plex Sans Arabic";
  src: url("/assets/fonts/plex-ar-700.woff2") format("woff2");
  font-weight: 700 900;
  font-style: normal;
  font-display: swap;
  unicode-range: U+0600-06FF, U+0750-077F, U+0870-08FF, U+200C-200F, U+FB50-FDFF, U+FE70-FEFF;
}

/* ---------- Tokens: light (default; also the fallback when the OS reports no preference, matching site.css) ---------- */
:root {
  color-scheme: light;
  --bg: #fafafa;
  --s1: #fff;
  --s2: #f2f2f5;
  --border: rgba(0, 0, 0, .10);
  --border-strong: rgba(0, 0, 0, .20);
  --text-1: #1d1d1f;
  --text-2: #515154;
  --text-3: #6e6e73;
  --accent: #1f9d45;
  --accent-text: #167332;
  --accent-fill: #1a7f37;
  --on-accent: #fff;
  --accent-soft: rgba(31, 157, 69, .10);
  --accent-border: rgba(31, 157, 69, .40);
  --danger: #b3261e;
  --danger-soft: rgba(179, 38, 30, .08);
  --warning: #9a4d00;
  --warning-soft: rgba(154, 77, 0, .08);
  --info: #0057c8;
  --info-soft: rgba(0, 87, 200, .08);
  --gold: #7a5f00;
  --gold-soft: rgba(122, 95, 0, .08);
  --purple: #8e35c9;
  --track: #c7c7cc;
  --topbar-bg: rgba(250, 250, 250, .85);
  --glow: rgba(31, 157, 69, .08);

  --font-sans: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-ar-system: "Segoe UI", Tahoma, system-ui, sans-serif;
  --measure: 68ch;
  --ease: cubic-bezier(.2, .8, .2, 1);
  --t-fast: 150ms;
  --t-med: 250ms;
  --t-slow: 400ms;
  --r-sm: 8px;
  --r: 12px;
  --r-lg: 20px;
  --topbar-h: 64px;
}

/* ---------- Tokens: dark (system preference, unless the user forced light) ---------- */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark;
    --bg: #000;
    --s1: #111113;
    --s2: #1c1c1e;
    --border: rgba(255, 255, 255, .10);
    --border-strong: rgba(255, 255, 255, .18);
    --text-1: #f5f5f7;
    --text-2: #a1a1a6;
    --text-3: #8e8e93;
    --accent: #30d158;
    --accent-text: #30d158;
    --accent-fill: #30d158;
    --on-accent: #000;
    --accent-soft: rgba(48, 209, 88, .14);
    --accent-border: rgba(48, 209, 88, .40);
    --danger: #ff6961;
    --danger-soft: rgba(255, 105, 97, .14);
    --warning: #ff9f0a;
    --warning-soft: rgba(255, 159, 10, .14);
    --info: #409cff;
    --info-soft: rgba(64, 156, 255, .14);
    --gold: #d4af37;
    --gold-soft: rgba(212, 175, 55, .14);
    --purple: #bf5af2;
    --track: #3a3a3c;
    --topbar-bg: rgba(0, 0, 0, .78);
    --glow: rgba(48, 209, 88, .10);
  }
}
/* ---------- Tokens: dark (explicit override) ---------- */
:root[data-theme="dark"] {
  color-scheme: dark;
  --bg: #000;
  --s1: #111113;
  --s2: #1c1c1e;
  --border: rgba(255, 255, 255, .10);
  --border-strong: rgba(255, 255, 255, .18);
  --text-1: #f5f5f7;
  --text-2: #a1a1a6;
  --text-3: #8e8e93;
  --accent: #30d158;
  --accent-text: #30d158;
  --accent-fill: #30d158;
  --on-accent: #000;
  --accent-soft: rgba(48, 209, 88, .14);
  --accent-border: rgba(48, 209, 88, .40);
  --danger: #ff6961;
  --danger-soft: rgba(255, 105, 97, .14);
  --warning: #ff9f0a;
  --warning-soft: rgba(255, 159, 10, .14);
  --info: #409cff;
  --info-soft: rgba(64, 156, 255, .14);
  --gold: #d4af37;
  --gold-soft: rgba(212, 175, 55, .14);
  --purple: #bf5af2;
  --track: #3a3a3c;
  --topbar-bg: rgba(0, 0, 0, .78);
  --glow: rgba(48, 209, 88, .10);
}

html[lang="ar"] {
  --font-sans: "IBM Plex Sans Arabic", "Inter", system-ui, -apple-system, "Segoe UI", Tahoma, Arial, sans-serif;
  --measure: 60ch;
}

/* ---------- Base ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; }
@media (prefers-reduced-motion: no-preference) {
  html { scroll-behavior: smooth; }
}
body {
  margin: 0;
  background: var(--bg);
  color: var(--text-1);
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.6;
  overflow-x: clip;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}
html[lang="ar"] body { line-height: 1.85; letter-spacing: 0; }
/* Arabic headings: never tighter than 1.3 so tashkeel (e.g. يُهندَس) has room above and below */
html[lang="ar"] h1, html[lang="ar"] h2, html[lang="ar"] h3, html[lang="ar"] h4 { line-height: 1.45; letter-spacing: 0; }
/* Latin terms inside Arabic copy: isolated, optically matched to Plex Arabic */
html[lang="ar"] bdi[lang="en"] { unicode-bidi: isolate; font-size: .92em; }
/* EN pages: Arabic-script snippets (the «العربية» link) use a system stack, so Plex Arabic is never downloaded */
html[lang="en"] [lang="ar"] { font-family: var(--font-ar-system); }
img, svg { max-width: 100%; }
img { height: auto; display: block; }
a { color: var(--accent-text); text-underline-offset: .18em; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 2px solid var(--accent-text); outline-offset: 2px; }
[id] { scroll-margin-top: calc(var(--topbar-h) + 16px); }
strong, b { font-weight: 600; color: var(--text-1); }
var { font-style: italic; font-family: inherit; }
bdi[dir="ltr"] { unicode-bidi: isolate; }
.tnum, table, input, output, .calc-output-val, .equation-math, .score-value { font-variant-numeric: tabular-nums; }
.visually-hidden {
  position: absolute !important; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}
[hidden] { display: none !important; }

/* ---------- No-JS: hide controls that need script; every tab panel stays visible ---------- */
.no-js [role="tablist"],
.no-js .theme-toggle,
.no-js [data-print],
.no-js .doc-actions,
.no-js .reader-tools,
.no-js .mode-selector { display: none; }
.no-js .tab-panel + .tab-panel { margin-block-start: 32px; padding-block-start: 32px; border-block-start: 1px solid var(--border); }
.no-js .progress { display: none; }

/* Thin vertical rule used as a separator in meta lines (replaces the Latin middle dot on Arabic pages) */
.sep { display: inline-block; width: 1px; height: .9em; margin-inline: .6em; vertical-align: -.1em; background: var(--border-strong); }

.skip-link {
  position: absolute;
  inset-inline-start: 16px;
  inset-block-start: -200px;
  z-index: 1100;
  background: var(--accent-fill);
  color: var(--on-accent);
  padding: 12px 16px;
  border-radius: var(--r-sm);
  font-weight: 600;
  text-decoration: none;
}
.skip-link:focus { inset-block-start: 12px; }

.wrap {
  width: 100%;
  max-width: 1200px;
  margin-inline: auto;
  padding-inline: 16px;
}
@media (min-width: 768px) { .wrap { padding-inline: 24px; } }

/* ---------- Reading progress ---------- */
.progress {
  position: fixed;
  inset-block-start: 0;
  inset-inline: 0;
  height: 3px;
  z-index: 1001;
  pointer-events: none;
}
.progress-bar {
  height: 100%;
  width: 100%;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: 0 50%;
}
html[dir="rtl"] .progress-bar { transform-origin: 100% 50%; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 44px;
  padding: 0 16px;
  border-radius: 999px;
  border: 1px solid transparent;
  font: inherit;
  font-size: .9375rem;
  font-weight: 600;
  line-height: 1.2;
  text-decoration: none;
  cursor: pointer;
  white-space: nowrap;
  transition: background-color var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease), color var(--t-fast) var(--ease);
}
.btn svg { width: 18px; height: 18px; flex: none; }
.btn-sm { min-height: 36px; padding: 0 12px; font-size: .875rem; }
.btn-lg { min-height: 52px; padding: 0 24px; font-size: 1rem; }
.btn-primary { background: var(--accent-fill); color: var(--on-accent); }
.btn-primary:hover { background: var(--accent-fill); filter: brightness(1.08); text-decoration: none; }
.btn-secondary { background: transparent; color: var(--text-1); border-color: var(--border-strong); }
.btn-secondary:hover { border-color: var(--accent-border); text-decoration: none; }
.btn-ghost { background: transparent; color: var(--text-1); }
.btn-ghost:hover { background: var(--s2); text-decoration: none; }
.icon-btn { width: 44px; padding: 0; }
.icon { width: 20px; height: 20px; stroke: currentColor; fill: none; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
html[dir="rtl"] .icon-flip { transform: scaleX(-1); }

/* ---------- Top bar ---------- */
.topbar {
  position: sticky;
  inset-block-start: 0;
  z-index: 1000;
  background: var(--topbar-bg);
  -webkit-backdrop-filter: saturate(180%) blur(16px);
  backdrop-filter: saturate(180%) blur(16px);
  border-block-end: 1px solid var(--border);
}
.topbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  min-height: var(--topbar-h);
}
.brand {
  display: inline-flex;
  flex-direction: column;
  color: var(--text-1);
  text-decoration: none;
  font-weight: 700;
  font-size: 1rem;
  line-height: 1.2;
  min-height: 44px;
  justify-content: center;
}
.brand small { font-weight: 500; font-size: .75rem; color: var(--text-3); }
.brand:hover { color: var(--accent-text); text-decoration: none; }
.topbar-actions { display: flex; align-items: center; gap: 4px; }
.theme-toggle .icon-sun { display: none; }
.theme-toggle[data-theme-current="dark"] .icon-sun { display: block; }
.theme-toggle[data-theme-current="dark"] .icon-moon { display: none; }
@media (max-width: 479px) {
  .brand small { display: none; }
  .topbar-actions .btn-book { display: none; }
}

/* ---------- Breadcrumb ---------- */
.breadcrumb { max-width: 880px; margin: 0 auto 16px; font-size: .875rem; }
.breadcrumb ol { display: flex; flex-wrap: wrap; align-items: center; gap: 4px 0; margin: 0; padding: 0; list-style: none; color: var(--text-2); }
.breadcrumb li { display: inline-flex; align-items: center; }
.breadcrumb li + li::before { content: "/"; margin-inline: 10px; color: var(--text-3); }
.breadcrumb a { display: inline-flex; align-items: center; min-height: 44px; color: var(--text-2); text-decoration: none; }
.breadcrumb a:hover { color: var(--accent-text); text-decoration: underline; }
.breadcrumb [aria-current="page"] { color: var(--text-1); font-weight: 500; }

/* ---------- Layout: document ---------- */
.pub-main { padding-block: 8px 64px; }
@media (min-width: 768px) { .pub-main { padding-block: 16px 96px; } }
.doc {
  max-width: 880px;
  margin-inline: auto;
}

/* Cover */
.doc-cover {
  position: relative;
  overflow: hidden;
  text-align: center;
  padding: 48px 20px 36px;
  margin-block-end: 48px;
  background: radial-gradient(120% 90% at 50% 0%, var(--glow), transparent 70%), var(--s1);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
}
@media (min-width: 768px) { .doc-cover { padding: 64px 48px 40px; } }
.doc-kicker {
  display: inline-block;
  margin: 0 0 16px;
  padding: 6px 14px;
  border-radius: 999px;
  background: var(--accent-soft);
  border: 1px solid var(--accent-border);
  color: var(--accent-text);
  font-size: .8125rem;
  font-weight: 600;
  letter-spacing: .02em;
}
html[lang="ar"] .doc-kicker { letter-spacing: 0; }
.doc-title {
  margin: 0 0 16px;
  font-size: clamp(2rem, 1.4rem + 2.4vw, 3.25rem);
  line-height: 1.1;
  font-weight: 700;
  letter-spacing: -.02em;
  text-wrap: balance;
}
html[lang="ar"] .doc-title { font-size: clamp(1.75rem, 1.3rem + 2vw, 2.75rem); line-height: 1.35; letter-spacing: 0; }
.doc-subtitle {
  max-width: 44rem;
  margin: 0 auto 16px;
  color: var(--text-2);
  font-size: clamp(1.0625rem, 1rem + .3vw, 1.25rem);
  line-height: 1.55;
  text-wrap: pretty;
}
.doc-dates {
  margin: 0 0 24px;
  color: var(--text-2);
  font-size: .9375rem;
}
.doc-dates time { color: var(--text-1); font-weight: 500; }
.doc-meta {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px 28px;
  margin: 0;
  padding-block-start: 20px;
  border-block-start: 1px solid var(--border);
  font-size: .875rem;
}
.doc-meta div { display: flex; gap: 6px; }
.doc-meta dt { color: var(--text-3); }
.doc-meta dd { margin: 0; color: var(--text-1); font-weight: 500; }
.doc-actions { display: flex; flex-wrap: wrap; justify-content: center; gap: 8px; margin-block-start: 24px; }

/* Reader tools (playbook) */
.reader-tools {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px 24px;
  margin-block-end: 40px;
  padding: 12px 16px;
  background: var(--s1);
  border: 1px solid var(--border);
  border-radius: var(--r);
  font-size: .9375rem;
  color: var(--text-2);
}
.font-sizer, .dir-switch { display: flex; align-items: center; gap: 8px; }
.font-sizer button {
  width: 44px; height: 44px;
  border-radius: var(--r-sm);
  border: 1px solid var(--border-strong);
  background: var(--s2);
  color: var(--text-1);
  font: inherit;
  font-size: 1.125rem;
  font-weight: 600;
  cursor: pointer;
}
.font-sizer button:hover { border-color: var(--accent-border); }
.dir-switch label { cursor: pointer; }

/* Switch (used by direction toggle + diagnostic) */
.switch {
  position: relative;
  display: inline-flex;
  flex: none;
  width: 52px;
  height: 32px;
}
.switch input {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  margin: 0;
  opacity: 0;
  cursor: pointer;
  z-index: 1;
}
.switch-track {
  position: absolute;
  inset: 0;
  border-radius: 999px;
  background: var(--track);
  border: 1px solid var(--border-strong);
  transition: background-color var(--t-med) var(--ease);
}
.switch-track::before {
  content: "";
  position: absolute;
  inset-block-start: 3px;
  inset-inline-start: 3px;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: #fff;
  box-shadow: 0 1px 3px rgba(0, 0, 0, .3);
  transition: transform var(--t-med) var(--ease);
}
.switch input:checked + .switch-track { background: var(--accent-fill); border-color: var(--accent-fill); }
.switch input:checked + .switch-track::before { transform: translateX(20px); }
html[dir="rtl"] .switch input:checked + .switch-track::before,
[dir="rtl"] .switch input:checked + .switch-track::before { transform: translateX(-20px); }
.switch input:focus-visible + .switch-track { outline: 2px solid var(--accent-text); outline-offset: 2px; }

/* ---------- Prose ---------- */
.prose { --pub-font-scale: 1; font-size: calc(1.0625rem * var(--pub-font-scale)); }
.prose > p, .prose > ul, .prose > ol, .prose > h2, .prose > h3 { max-width: var(--measure); }
.prose p { margin: 0 0 1.15em; text-wrap: pretty; }
.prose ul, .prose ol { margin: 0 0 1.4em; padding-inline-start: 1.4em; }
.prose li { margin-block-end: .5em; }
.prose li::marker { color: var(--accent-text); }
.prose h2 {
  margin: 2.6em 0 .8em;
  padding-block-end: .5em;
  border-block-end: 1px solid var(--border);
  font-size: clamp(1.4rem, 1.2rem + .9vw, 1.875rem);
  line-height: 1.25;
  font-weight: 700;
  letter-spacing: -.01em;
  text-wrap: balance;
}
.prose h2:first-child { margin-block-start: 0; }
.prose h3 {
  margin: 2em 0 .6em;
  font-size: 1.25rem;
  line-height: 1.35;
  font-weight: 600;
}
html[lang="ar"] .prose h2 { font-size: clamp(1.3rem, 1.15rem + .7vw, 1.625rem); line-height: 1.45; letter-spacing: 0; }
html[lang="ar"] .prose h3 { font-size: 1.125rem; line-height: 1.55; }

/* Callout */
.callout {
  max-width: var(--measure);
  margin: 2em 0;
  padding: 20px 24px;
  background: var(--s1);
  border: 1px solid var(--border);
  border-inline-start: 4px solid var(--accent);
  border-radius: var(--r);
}
.callout-title { display: flex; align-items: center; gap: 8px; margin: 0 0 8px; font-weight: 700; }
.callout-title .icon { color: var(--accent-text); }
.callout p { margin: 0; color: var(--text-2); }

/* Equations */
.equation-box {
  margin: 2em 0;
  padding: 22px 20px;
  background: var(--s1);
  border: 1px solid var(--border);
  border-radius: var(--r);
  text-align: center;
  overflow-x: auto;
}
.equation-box + .equation-box { margin-block-start: -1em; }
.equation-label {
  display: block;
  margin-block-end: 12px;
  color: var(--text-2);
  font-size: .875rem;
  font-weight: 600;
}
.equation-math {
  display: inline-flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 8px;
  color: var(--accent-text);
  font-size: clamp(1.05rem, .95rem + .6vw, 1.35rem);
  font-weight: 600;
  line-height: 1.5;
  overflow-wrap: anywhere;
}
.equation-math var { font-style: italic; }
.equation-note { margin: 8px 0 0; color: var(--text-3); font-size: .8125rem; }
.fraction { display: inline-flex; flex-direction: column; align-items: center; font-size: .85em; }
.fraction .numerator { border-block-end: 1px solid currentColor; padding: 2px 8px; }
.fraction .denominator { padding: 2px 8px; }
.fraction span { color: var(--text-1); }

/* Diagrams */
.diagram {
  margin: 2.2em 0;
  padding: 20px;
  background: var(--s1);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  text-align: center;
}
.diagram figcaption, .diagram-title {
  margin-block-end: 12px;
  color: var(--text-2);
  font-size: .9375rem;
  font-weight: 600;
}
.svg-diagram { display: block; width: 100%; height: auto; margin-inline: auto; direction: ltr; font-family: var(--font-sans); }
.svg-diagram.narrow { max-width: 640px; }
.svg-diagram text { font-family: var(--font-sans); }
.svg-grid { stroke: var(--border-strong); stroke-width: 1; }
.svg-grid.dashed { stroke-dasharray: 4; }
.svg-axis-label { fill: var(--text-2); font-size: 12px; }
.svg-label { fill: var(--text-1); font-size: 12px; font-weight: 600; }
.svg-sublabel { fill: var(--text-3); font-size: 11px; }
.svg-curve { fill: none; stroke: var(--accent); stroke-width: 3; }
.svg-box { fill: var(--s2); stroke: var(--border-strong); stroke-width: 2; }
.svg-bridge { fill: none; stroke: var(--accent); stroke-width: 6; stroke-dasharray: 2 3; }
.svg-arrow { fill: var(--accent); }
.svg-accent-text { fill: var(--accent-text); font-size: 12px; font-weight: 600; }
.svg-track { fill: none; stroke: var(--border-strong); stroke-width: 3; }
.svg-path-active { fill: none; stroke: var(--accent); stroke-width: 4; stroke-dasharray: 8 4; }
.svg-path-warning { fill: none; stroke: var(--danger); stroke-width: 4; }
.fill-accent { fill: var(--accent); }
.fill-warning { fill: var(--warning); }
.fill-danger { fill: var(--danger); }
.fill-info { fill: var(--info); }
.fill-gold { fill: var(--gold); }
.text-accent { fill: var(--accent-text); }
.text-warning { fill: var(--warning); }
.text-danger { fill: var(--danger); }
.text-info { fill: var(--info); }
.text-primary { fill: var(--text-1); }
.svg-diagram .t12 { font-size: 13px; font-weight: 600; }

/* Tables */
.table-wrap {
  margin: 2em 0;
  overflow-x: auto;
  background: var(--s1);
  border: 1px solid var(--border);
  border-radius: var(--r);
}
.table-wrap:focus-visible { outline-offset: 2px; }
.data-table { width: 100%; border-collapse: collapse; font-size: .9375rem; }
.data-table caption {
  caption-side: top;
  padding: 14px 20px 0;
  text-align: start;
  color: var(--text-3);
  font-size: .8125rem;
  font-weight: 600;
}
.data-table th, .data-table td {
  padding: 14px 20px;
  text-align: start;
  vertical-align: top;
  border-block-end: 1px solid var(--border);
}
.data-table thead th {
  color: var(--text-2);
  font-size: .8125rem;
  font-weight: 600;
  letter-spacing: .02em;
  text-transform: uppercase;
  border-block-end-width: 2px;
  white-space: nowrap;
}
html[lang="ar"] .data-table thead th { text-transform: none; letter-spacing: 0; font-size: .875rem; }
.data-table tbody tr:last-child > * { border-block-end: 0; }
.data-table td { color: var(--text-2); }
.data-table td strong, .data-table th[scope="row"] { color: var(--text-1); font-weight: 600; }
@media (max-width: 600px) {
  .data-table th, .data-table td { padding: 12px 14px; font-size: .875rem; }
}
.pct-badge {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 999px;
  background: var(--accent-soft);
  border: 1px solid var(--accent-border);
  color: var(--accent-text);
  font-weight: 700;
  font-size: .8125rem;
}

/* ---------- Cards: diagnostic + toolkit ---------- */
.panel-card {
  margin: 3em 0;
  padding: 24px 16px;
  background: var(--s1);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
}
@media (min-width: 768px) { .panel-card { padding: 40px; } }
.panel-card > h2 {
  margin: 0 0 .5em;
  padding: 0;
  border: 0;
  font-size: clamp(1.4rem, 1.2rem + .9vw, 1.875rem);
  line-height: 1.25;
}
html[lang="ar"] .panel-card > h2 { font-size: clamp(1.3rem, 1.15rem + .7vw, 1.625rem); line-height: 1.45; }
.panel-card > p { max-width: var(--measure); color: var(--text-2); }
.panel-tag {
  display: inline-block;
  margin-block-end: 12px;
  padding: 4px 12px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent-text);
  font-size: .8125rem;
  font-weight: 600;
}

/* Diagnostic checklist */
.diag-list { display: grid; gap: 12px; margin: 24px 0 0; padding: 0; list-style: none; }
.diag-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 44px;
  padding: 16px 18px;
  background: var(--s2);
  border: 1px solid var(--border);
  border-radius: var(--r);
  cursor: pointer;
  transition: border-color var(--t-fast) var(--ease);
}
.diag-item:hover { border-color: var(--accent-border); }
.diag-question { font-size: 1rem; line-height: 1.5; color: var(--text-1); }

.score-dashboard {
  --state: var(--text-2);
  --state-soft: var(--s2);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 24px 40px;
  margin-block-start: 32px;
  padding: 24px;
  background: var(--s2);
  border: 1px solid var(--border);
  border-radius: var(--r);
}
.score-dashboard[data-state="elite"] { --state: var(--accent-text); --state-soft: var(--accent-soft); }
.score-dashboard[data-state="optimized"] { --state: var(--info); --state-soft: var(--info-soft); }
.score-dashboard[data-state="developing"] { --state: var(--warning); --state-soft: var(--warning-soft); }
.score-dashboard[data-state="danger"] { --state: var(--danger); --state-soft: var(--danger-soft); }
.score-ring { position: relative; width: 140px; height: 140px; flex: none; }
.score-ring svg { width: 140px; height: 140px; transform: rotate(-90deg); }
.score-ring-bg { fill: none; stroke: var(--track); stroke-width: 10; }
.score-ring-fill {
  fill: none;
  stroke: var(--state);
  stroke-width: 10;
  stroke-linecap: round;
  stroke-dasharray: 377;
  stroke-dashoffset: var(--offset, 377);
  transition: stroke-dashoffset var(--t-slow) var(--ease), stroke var(--t-med) var(--ease);
}
.score-value {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  font-size: 2rem;
  font-weight: 700;
  direction: ltr;
}
.score-feedback { flex: 1 1 280px; max-width: 460px; }
.feedback-badge {
  display: inline-block;
  margin-block-end: 8px;
  padding: 4px 12px;
  border-radius: 999px;
  background: var(--state-soft);
  color: var(--state);
  font-size: .8125rem;
  font-weight: 700;
}
.feedback-title { margin: 0 0 6px; color: var(--state); font-size: 1.25rem; font-weight: 700; line-height: 1.35; }
.score-dashboard[data-state="initial"] .feedback-title { color: var(--text-1); }
.feedback-desc { margin: 0; color: var(--text-2); font-size: .9375rem; }

/* Toolkit */
.toolkit-intro { color: var(--text-2); margin: 0 0 20px; }
.tabs {
  display: flex;
  gap: 8px;
  margin-block-end: 24px;
  padding-block-end: 12px;
  overflow-x: auto;
  border-block-end: 1px solid var(--border);
  scrollbar-width: thin;
  -webkit-overflow-scrolling: touch;
}
.tab {
  flex: none;
  min-height: 44px;
  padding: 0 16px;
  border-radius: 999px;
  border: 1px solid var(--border-strong);
  background: transparent;
  color: var(--text-2);
  font: inherit;
  font-size: .875rem;
  font-weight: 500;
  white-space: nowrap;
  cursor: pointer;
  transition: background-color var(--t-fast) var(--ease), color var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease);
}
.tab:hover { color: var(--text-1); border-color: var(--accent-border); }
.tab[aria-selected="true"] { background: var(--accent-fill); border-color: var(--accent-fill); color: var(--on-accent); font-weight: 600; }
.tab-panel:focus-visible { outline-offset: 6px; border-radius: var(--r-sm); }
.panel-heading { margin: 0 0 16px; font-size: 1.125rem; font-weight: 600; }

.calc-grid { display: grid; grid-template-columns: 1fr; gap: 20px; }
@media (min-width: 768px) {
  .calc-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
  .calc-grid.wide-inputs { grid-template-columns: 1.1fr .9fr; }
}
.calc-inputs { display: flex; flex-direction: column; gap: 18px; }
.calc-inputs.two-col { display: grid; grid-template-columns: 1fr; gap: 18px; }
@media (min-width: 640px) { .calc-inputs.two-col { grid-template-columns: 1fr 1fr; } }
.calc-group { display: flex; flex-direction: column; gap: 6px; }
.calc-group label, .group-label { color: var(--text-2); font-size: .875rem; font-weight: 600; line-height: 1.4; }
.calc-input {
  width: 100%;
  min-height: 44px;
  padding: 10px 12px;
  background: var(--bg);
  border: 1px solid var(--border-strong);
  border-radius: var(--r-sm);
  color: var(--text-1);
  font: inherit;
  font-size: 1rem;
  transition: border-color var(--t-fast) var(--ease);
}
.calc-input:hover { border-color: var(--text-3); }
.calc-input:focus-visible { border-color: var(--accent-text); }
select.calc-input { cursor: pointer; }
html[lang="ar"] input[type="number"].calc-input { direction: ltr; text-align: end; }
.slider-row { display: flex; align-items: center; gap: 12px; min-height: 44px; }
.calc-slider { flex: 1; min-width: 0; accent-color: var(--accent-fill); height: 28px; cursor: pointer; }
.slider-row output {
  min-width: 3.5em;
  color: var(--accent-text);
  font-weight: 700;
  text-align: end;
  direction: ltr;
}
html[dir="rtl"] .slider-row output, [dir="rtl"] .slider-row output { text-align: start; }

.calc-outputs {
  display: flex;
  flex-direction: column;
  gap: 16px;
  align-self: start;
  padding: 20px;
  background: var(--s2);
  border: 1px solid var(--border);
  border-radius: var(--r);
}
.calc-output-item {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 4px 16px;
  padding-block-end: 12px;
  border-block-end: 1px dashed var(--border-strong);
}
.calc-output-item:last-of-type { border-block-end: 0; padding-block-end: 0; }
.calc-output-item.stacked { flex-direction: column; align-items: stretch; }
.calc-output-label { flex: 1 1 12rem; color: var(--text-2); font-size: .875rem; }
.calc-output-val { color: var(--accent-text); font-size: 1.3rem; font-weight: 700; line-height: 1.3; }
.calc-output-val.danger { color: var(--danger); }
.calc-output-val.warning { color: var(--warning); }
.calc-output-val.info { color: var(--info); }
.calc-output-val.gold, .calc-output-label.gold { color: var(--gold); }
.calc-output-val.purple { color: var(--purple); }
.calc-output-val.large { font-size: 1.75rem; }
.calc-desc { margin: 0; color: var(--text-2); font-size: .875rem; line-height: 1.6; }
.verdict-text { margin: 0; color: var(--accent-text); font-weight: 700; font-size: .9375rem; line-height: 1.5; }

/* Scenario simulator (doctrine) */
.scenario { display: flex; flex-direction: column; gap: 0; }
.scenario-block { padding-block: 0 16px; margin-block-end: 16px; border-block-end: 1px solid var(--border); }
.scenario-block.dashed { border-block-end-style: dashed; }
.scenario-kicker { display: block; color: var(--accent-text); font-size: .8125rem; font-weight: 700; letter-spacing: .04em; text-transform: uppercase; }
.scenario-kicker.muted { color: var(--text-2); }
html[lang="ar"] .scenario-kicker { letter-spacing: 0; text-transform: none; }
.scenario-title { margin: 8px 0 0; font-size: 1.2rem; line-height: 1.35; }
.scenario-text { margin: 8px 0 0; color: var(--text-2); font-size: .9375rem; }
.scenario-verdict { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 16px; }
.scenario-verdict small { display: block; margin-block-end: 4px; color: var(--text-2); font-size: .8125rem; }
.scenario-verdict strong { font-size: 1.0625rem; }
.verdict-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 18px;
  border-radius: 999px;
  font-weight: 700;
  background: var(--accent-soft);
  color: var(--accent-text);
}
.verdict-badge.kill { background: var(--danger-soft); color: var(--danger); }

/* Playbook: governance mode selector */
.mode-selector {
  margin-block-end: 24px;
  padding: 16px;
  background: var(--s2);
  border: 1px solid var(--border);
  border-radius: var(--r);
}
.mode-selector .group-label { display: block; margin-block-end: 12px; color: var(--gold); }
.mode-buttons { display: grid; grid-template-columns: 1fr; gap: 8px; }
@media (min-width: 640px) { .mode-buttons { grid-template-columns: repeat(3, 1fr); } }
.mode-btn {
  min-height: 44px;
  padding: 8px 12px;
  border-radius: var(--r-sm);
  border: 1px solid var(--border-strong);
  background: transparent;
  color: var(--text-2);
  font: inherit;
  font-size: .875rem;
  font-weight: 600;
  line-height: 1.35;
  cursor: pointer;
  transition: border-color var(--t-fast) var(--ease), color var(--t-fast) var(--ease), background-color var(--t-fast) var(--ease);
}
.mode-btn:hover { border-color: var(--gold); color: var(--text-1); }
.mode-btn[aria-pressed="true"] { background: var(--gold-soft); border-color: var(--gold); color: var(--gold); }
/* Mode filtering is a JS enhancement: without JS every field stays visible */
.js .toolkit[data-mode="horizontal"] .mode-dependent:not(.horizontal),
.js .toolkit[data-mode="vertical"] .mode-dependent:not(.vertical),
.js .toolkit[data-mode="hybrid"] .mode-dependent:not(.hybrid) { display: none; }

/* Badges */
.meta-badges { display: flex; flex-wrap: wrap; gap: 8px; }
.meta-badge {
  display: inline-flex;
  align-items: center;
  padding: 4px 10px;
  border-radius: var(--r-sm);
  font-size: .8125rem;
  font-weight: 700;
  background: var(--s1);
  color: var(--text-2);
  border: 1px solid var(--border);
}
.meta-badge.confidence { background: var(--info-soft); color: var(--info); border-color: transparent; }
.meta-badge.risk-low { background: var(--accent-soft); color: var(--accent-text); border-color: transparent; }
.meta-badge.risk-medium { background: var(--warning-soft); color: var(--warning); border-color: transparent; }
.meta-badge.risk-high { background: var(--danger-soft); color: var(--danger); border-color: transparent; }

.explanation-card {
  padding: 14px 16px;
  background: var(--s1);
  border: 1px solid var(--border);
  border-inline-start: 4px solid var(--accent);
  border-radius: var(--r-sm);
}
.explanation-card-title { margin: 0 0 6px; color: var(--accent-text); font-size: .875rem; font-weight: 700; }

/* Priority table */
.priority-table td:nth-child(3) { color: var(--accent-text); font-weight: 700; }
.priority-table tr.is-top td { background: var(--accent-soft); }
.rank-badge {
  display: inline-grid;
  place-items: center;
  min-width: 28px;
  height: 28px;
  padding: 0 6px;
  border-radius: var(--r-sm);
  background: var(--accent-fill);
  color: var(--on-accent);
  font-weight: 700;
  font-size: .8125rem;
}

/* Operating leverage chart */
.chart-card { padding: 14px; background: var(--s1); border: 1px solid var(--border); border-radius: var(--r); }
.chart-title { margin: 0 0 8px; color: var(--text-2); font-size: .8125rem; font-weight: 700; text-align: center; }
.chart-axis { stroke: var(--track); stroke-width: 1; }
.chart-axis-label { fill: var(--text-3); font-size: 8px; }
.curve-ebitda { fill: none; stroke: var(--accent); stroke-width: 2.5; }
.curve-ga { fill: none; stroke: var(--warning); stroke-width: 2; stroke-dasharray: 4 2; }
.chart-marker { fill: var(--gold); stroke: var(--text-1); stroke-width: 1; }
.chart-legend { display: flex; flex-wrap: wrap; justify-content: center; gap: 6px 16px; margin: 8px 0 0; padding: 0; list-style: none; font-size: .8125rem; }
.chart-legend li { display: inline-flex; align-items: center; gap: 6px; color: var(--text-2); }
.chart-legend li::before { content: ""; display: inline-block; width: 14px; height: 3px; border-radius: 2px; background: currentColor; }
.chart-legend .lg-ebitda::before { background: var(--accent); }
.chart-legend .lg-ga::before { background: var(--warning); }
.chart-legend .lg-marker::before { width: 9px; height: 9px; border-radius: 50%; background: var(--gold); }

/* ---------- Footer: author box + CTA ---------- */
.pub-footer { border-block-start: 1px solid var(--border); background: var(--s1); }
.pub-footer .wrap { max-width: 928px; padding-block: 48px 32px; }
.author-box {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  align-items: flex-start;
  padding: 24px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
}
.author-photo { width: 88px; height: 88px; border-radius: 50%; object-fit: cover; flex: none; background: var(--s2); }
.author-body { flex: 1 1 280px; }
.author-body h2 { margin: 0 0 8px; font-size: 1.25rem; line-height: 1.35; }
.author-body p { margin: 0 0 12px; color: var(--text-2); max-width: var(--measure); }
.author-links { display: flex; flex-wrap: wrap; gap: 8px 20px; margin: 0; padding: 0; list-style: none; }
.author-links a { display: inline-flex; align-items: center; min-height: 44px; font-weight: 600; }
/* Series row (vols 1–3), shared by the Doctrine, Playbook and Ledger footers */
.author-series { display: flex; flex-wrap: wrap; align-items: center; gap: 0 12px; margin-block-start: 8px; padding-block-start: 4px; border-block-start: 1px solid var(--border); font-size: .875rem; }
.author-series .as-k { color: var(--text-3); font-weight: 600; }
.author-series ol { display: flex; flex-wrap: wrap; align-items: center; margin: 0; padding: 0; list-style: none; }
.author-series li + li::before { content: "·"; margin-inline: 8px; color: var(--text-3); }
.author-series a { display: inline-flex; align-items: center; gap: .35em; min-height: 44px; color: var(--text-2); }
.author-series a:hover { color: var(--text-1); }
.author-series a[aria-current="page"] { color: var(--text-1); font-weight: 600; text-decoration: none; }
.author-series .as-v { color: var(--text-3); font-weight: 400; }
.leadin-card {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px 24px;
  margin-block-start: 16px;
  padding: 20px 24px;
  background: var(--accent-soft);
  border: 1px solid var(--accent-border);
  border-radius: var(--r-lg);
}
.leadin-body { flex: 1 1 300px; }
.leadin-card h2 { margin: 0 0 4px; font-size: 1.125rem; line-height: 1.35; }
html[lang="ar"] .leadin-card h2 { line-height: 1.5; }
.leadin-card p { margin: 0; color: var(--text-2); font-size: .9375rem; }
.leadin-card .btn { flex: none; }
.leadin-btns { display: flex; flex-wrap: wrap; gap: 8px 12px; }
@media (max-width: 479px) { .leadin-btns { width: 100%; } .leadin-card .btn { width: 100%; white-space: normal; text-align: center; } }
.footer-nav { display: flex; flex-wrap: wrap; justify-content: center; gap: 4px 20px; margin: 32px 0 8px; padding: 0; list-style: none; }
.footer-nav a { display: inline-flex; align-items: center; min-height: 44px; color: var(--text-2); text-decoration: none; }
.footer-nav a:hover { color: var(--text-1); text-decoration: underline; }
.footer-line { margin: 0; text-align: center; color: var(--text-3); font-size: .8125rem; }

/* ---------- Reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
    scroll-behavior: auto !important;
  }
}

/* ---------- Print ---------- */
@media print {
  :root, :root[data-theme="dark"], :root[data-theme="light"], :root:not([data-theme="light"]) {
    color-scheme: light;
    --bg: #fff; --s1: #fff; --s2: #fff;
    --border: #bbb; --border-strong: #888;
    --text-1: #000; --text-2: #222; --text-3: #444;
    --accent: #000; --accent-text: #000; --accent-fill: #000; --on-accent: #fff;
    --accent-soft: transparent; --accent-border: #000; --glow: transparent;
    --danger: #000; --warning: #000; --info: #000; --gold: #000; --purple: #000; --track: #ccc;
  }
  @page { margin: 18mm 16mm; }
  body { font-size: 11pt; line-height: 1.5; background: #fff; color: #000; }
  .skip-link, .progress, .topbar, .reader-tools, .doc-actions, .toolkit, .score-dashboard,
  .switch-track, .leadin-card .btn, .footer-nav, .author-photo, .breadcrumb { display: none !important; }
  .leadin-card { border: 1px solid #000; background: none; }
  .pub-main { padding: 0; }
  .doc, .prose > * { max-width: none; }
  .doc-cover { background: none; border: 0; border-block-end: 2px solid #000; border-radius: 0; padding: 0 0 16pt; margin-block-end: 20pt; }
  .doc-title { font-size: 26pt; }
  .prose { font-size: 11pt; }
  .prose h2 { font-size: 16pt; break-after: avoid; border-block-end: 1px solid #000; }
  .prose h3 { font-size: 13pt; break-after: avoid; }
  .equation-box, .diagram, .table-wrap, .callout, .diag-item { break-inside: avoid; }
  .table-wrap { overflow: visible; border-color: #000; }
  .data-table thead th { background: #eee; }
  .panel-card { border: 1px solid #000; padding: 12pt; }
  .diag-item { background: none; border: 0; border-block-end: 1px dotted #999; border-radius: 0; padding: 8pt 0; }
  .diag-item .switch { width: auto; height: auto; }
  .diag-item .switch::after { content: "[   ]"; font-family: monospace; font-size: 12pt; }
  .diag-item .switch input { display: none; }
  .pub-footer { background: none; border-block-start: 1px solid #000; }
  .pub-footer .wrap { padding-block: 12pt 0; }
  .author-box { border: 0; padding: 0; }
  a { color: #000; text-decoration: none; }
  .author-links a[href^="http"]::after { content: " (" attr(href) ")"; font-weight: 400; }
}