:root {
  --bg: #fafafa;
  --surface: #fff;
  --text: #1a1a1a;
  --heading: #0d0d0d;
  --muted: #5c5c5c;
  --border: #e2e2e2;
  --accent: #0d47a1;
  --accent-hover: #1565c0;
  --accent-soft: rgba(13, 71, 161, 0.12);
  --sidebar-bg: #f0f4f8;
  /* Sidebar nav groups: inactive stripe/tint; active = same hue, more saturated fill */
  --nav-group-start: #0f766e;
  --nav-group-start-soft: rgba(15, 118, 110, 0.11);
  --nav-group-start-active: #0d9488;
  --nav-group-start-active-hover: #14b8a6;
  --nav-group-start-active-border: #115e59;
  --nav-group-start-active-stripe: #5eead4;
  --nav-group-study: #4338ca;
  --nav-group-study-soft: rgba(67, 56, 202, 0.1);
  --nav-group-study-active: #4f46e5;
  --nav-group-study-active-hover: #6366f1;
  --nav-group-study-active-border: #3730a3;
  --nav-group-study-active-stripe: #c7d2fe;
  --nav-group-rubrics: #b45309;
  --nav-group-rubrics-soft: rgba(180, 83, 9, 0.12);
  --nav-group-rubrics-active: #d97706;
  --nav-group-rubrics-active-hover: #f59e0b;
  --nav-group-rubrics-active-border: #b45309;
  --nav-group-rubrics-active-stripe: #fde68a;
  --nav-group-conduct: #047857;
  --nav-group-conduct-soft: rgba(4, 120, 87, 0.1);
  --nav-group-conduct-active: #059669;
  --nav-group-conduct-active-hover: #10b981;
  --nav-group-conduct-active-border: #065f46;
  --nav-group-conduct-active-stripe: #a7f3d0;
  --nav-group-integrity: #9d174d;
  --nav-group-integrity-soft: rgba(157, 23, 77, 0.1);
  --nav-group-integrity-active: #be185d;
  --nav-group-integrity-active-hover: #db2777;
  --nav-group-integrity-active-border: #831843;
  --nav-group-integrity-active-stripe: #fbcfe8;
  --sidebar-width: 15.5rem;
  --radius: 6px;
  --max: 42rem;
  --font: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  font-size: 100%;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: var(--font);
  font-size: 1rem;
  line-height: 1.65;
  color: var(--text);
  background: var(--bg);
  min-height: 100vh;
}

/* —— Layout: sidebar + main —— */
.site-nav-root {
  display: contents;
}

.site-sidebar {
  position: fixed;
  left: 0;
  top: 0;
  z-index: 200;
  width: var(--sidebar-width);
  height: 100vh;
  margin: 0;
  padding: 1rem 0 1.5rem;
  background: var(--sidebar-bg);
  border-right: 1px solid var(--border);
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}

.site-lang {
  padding: 0 0.65rem 0.65rem;
  margin-bottom: 0.35rem;
  border-bottom: 1px solid var(--border);
}

.site-lang__label {
  display: block;
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 0.35rem;
}

.site-lang__btns {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem;
}

.site-lang__btn {
  font: inherit;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.28rem 0.45rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--text);
  cursor: pointer;
  line-height: 1.2;
  -webkit-tap-highlight-color: transparent;
}

.site-lang__btn:hover {
  border-color: var(--muted);
}

.site-lang__btn--active {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

html[dir="rtl"] .site-sidebar {
  left: auto;
  right: 0;
  border-right: none;
  border-left: 1px solid var(--border);
}

html[dir="rtl"] main {
  margin-left: 0;
  margin-right: var(--sidebar-width);
}

html[dir="rtl"] main.main--rubric-matrix {
  margin-left: 0;
  margin-right: var(--sidebar-width);
}

html.lang-ur body {
  font-family: "Segoe UI", "Noto Nastaliq Urdu", "Geeza Pro", "Arabic Typesetting", system-ui, sans-serif;
}

.site-sidebar__head {
  padding: 0 1rem 0.75rem;
  border-bottom: 1px solid var(--border);
  margin-bottom: 0.5rem;
}

.site-sidebar__brand {
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--accent);
  text-decoration: none;
  letter-spacing: 0.02em;
  line-height: 1.3;
  display: block;
}

.site-sidebar__brand:hover {
  text-decoration: underline;
}

.site-sidebar__nav {
  display: flex;
  flex-direction: column;
  gap: 0.125rem;
  padding: 0 0.5rem;
}

.site-sidebar__nav a {
  display: block;
  padding: 0.45rem 0.5rem;
  font-size: 0.8125rem;
  font-weight: 500;
  line-height: 1.35;
  color: var(--text);
  text-decoration: none;
  border-radius: var(--radius);
  border: 1px solid transparent;
  border-inline-start: 3px solid transparent;
}

.site-sidebar__nav a.site-sidebar__nav-link--section-gap {
  margin-top: 0.45rem;
  padding-top: 0.55rem;
  border-top: 1px solid var(--border);
}

.site-sidebar__nav a[data-nav-group="start"]:not([aria-current="page"]) {
  border-inline-start-color: var(--nav-group-start);
  background: var(--nav-group-start-soft);
}

.site-sidebar__nav a[data-nav-group="study"]:not([aria-current="page"]) {
  border-inline-start-color: var(--nav-group-study);
  background: var(--nav-group-study-soft);
}

.site-sidebar__nav a[data-nav-group="rubrics"]:not([aria-current="page"]) {
  border-inline-start-color: var(--nav-group-rubrics);
  background: var(--nav-group-rubrics-soft);
}

.site-sidebar__nav a[data-nav-group="conduct"]:not([aria-current="page"]) {
  border-inline-start-color: var(--nav-group-conduct);
  background: var(--nav-group-conduct-soft);
}

.site-sidebar__nav a[data-nav-group="integrity"]:not([aria-current="page"]) {
  border-inline-start-color: var(--nav-group-integrity);
  background: var(--nav-group-integrity-soft);
}

.site-sidebar__nav a:hover {
  background: var(--surface);
  border-color: var(--border);
}

.site-sidebar__nav a[data-nav-group="start"]:not([aria-current="page"]):hover {
  background: rgba(15, 118, 110, 0.18);
  border-color: var(--border);
}

.site-sidebar__nav a[data-nav-group="study"]:not([aria-current="page"]):hover {
  background: rgba(67, 56, 202, 0.16);
  border-color: var(--border);
}

.site-sidebar__nav a[data-nav-group="rubrics"]:not([aria-current="page"]):hover {
  background: rgba(180, 83, 9, 0.18);
  border-color: var(--border);
}

.site-sidebar__nav a[data-nav-group="conduct"]:not([aria-current="page"]):hover {
  background: rgba(4, 120, 87, 0.16);
  border-color: var(--border);
}

.site-sidebar__nav a[data-nav-group="integrity"]:not([aria-current="page"]):hover {
  background: rgba(157, 23, 77, 0.16);
  border-color: var(--border);
}

.site-sidebar__nav a[aria-current="page"] {
  color: #fff;
  border-inline-start-width: 3px;
  border-inline-start-style: solid;
}

.site-sidebar__nav a[aria-current="page"][data-nav-group="start"] {
  background: var(--nav-group-start-active);
  border-color: var(--nav-group-start-active-border);
  border-inline-start-color: var(--nav-group-start-active-stripe);
}

.site-sidebar__nav a[aria-current="page"][data-nav-group="start"]:hover {
  background: var(--nav-group-start-active-hover);
  border-color: var(--nav-group-start-active);
  border-inline-start-color: #ccfbf1;
}

.site-sidebar__nav a[aria-current="page"][data-nav-group="study"] {
  background: var(--nav-group-study-active);
  border-color: var(--nav-group-study-active-border);
  border-inline-start-color: var(--nav-group-study-active-stripe);
}

.site-sidebar__nav a[aria-current="page"][data-nav-group="study"]:hover {
  background: var(--nav-group-study-active-hover);
  border-color: var(--nav-group-study-active);
  border-inline-start-color: #e0e7ff;
}

.site-sidebar__nav a[aria-current="page"][data-nav-group="rubrics"] {
  background: var(--nav-group-rubrics-active);
  border-color: var(--nav-group-rubrics-active-border);
  border-inline-start-color: var(--nav-group-rubrics-active-stripe);
}

.site-sidebar__nav a[aria-current="page"][data-nav-group="rubrics"]:hover {
  background: var(--nav-group-rubrics-active-hover);
  border-color: var(--nav-group-rubrics-active);
  border-inline-start-color: #fef3c7;
}

.site-sidebar__nav a[aria-current="page"][data-nav-group="conduct"] {
  background: var(--nav-group-conduct-active);
  border-color: var(--nav-group-conduct-active-border);
  border-inline-start-color: var(--nav-group-conduct-active-stripe);
}

.site-sidebar__nav a[aria-current="page"][data-nav-group="conduct"]:hover {
  background: var(--nav-group-conduct-active-hover);
  border-color: var(--nav-group-conduct-active);
  border-inline-start-color: #d1fae5;
}

.site-sidebar__nav a[aria-current="page"][data-nav-group="integrity"] {
  background: var(--nav-group-integrity-active);
  border-color: var(--nav-group-integrity-active-border);
  border-inline-start-color: var(--nav-group-integrity-active-stripe);
}

.site-sidebar__nav a[aria-current="page"][data-nav-group="integrity"]:hover {
  background: var(--nav-group-integrity-active-hover);
  border-color: var(--nav-group-integrity-active);
  border-inline-start-color: #fce7f3;
}

/* Fallback if a page ever lacks data-nav-group */
.site-sidebar__nav a[aria-current="page"]:not([data-nav-group]) {
  background: var(--accent);
  border-color: var(--accent);
  border-inline-start-color: #93c5fd;
}

.site-sidebar__nav a[aria-current="page"]:not([data-nav-group]):hover {
  background: var(--accent-hover);
  border-color: var(--accent-hover);
  border-inline-start-color: #bfdbfe;
}

.nav-backdrop {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 150;
  background: rgba(0, 0, 0, 0.35);
  border: none;
  padding: 0;
  margin: 0;
  cursor: pointer;
}

.mobile-topbar {
  display: none;
}

main {
  max-width: var(--max);
  margin: 0;
  padding: 1.75rem 1rem 3rem;
  margin-left: var(--sidebar-width);
}

main h1 {
  margin: 0 0 0.5rem;
  font-size: 1.5625rem;
  font-weight: 800;
  line-height: 1.22;
  letter-spacing: -0.025em;
  color: var(--heading);
}

.lead {
  margin: 0 0 1.5rem;
  font-size: 0.9375rem;
  line-height: 1.65;
  color: var(--muted);
}

.lead strong {
  font-weight: 700;
  color: var(--heading);
}

main h2 {
  margin: 2rem 0 0.6rem;
  padding: 0.5rem 0.75rem 0.5rem 0.65rem;
  border-left: 3px solid var(--accent);
  font-size: 1.125rem;
  font-weight: 700;
  line-height: 1.35;
  letter-spacing: -0.02em;
  color: var(--heading);
  background: linear-gradient(90deg, var(--accent-soft) 0%, transparent 100%);
  display: flex;
  align-items: center;
  min-height: 2.5rem;
}

main h2:first-of-type {
  margin-top: 0;
}

main p {
  margin: 0 0 0.75rem;
}

main ul {
  margin: 0 0 1.15rem;
  padding-left: 1.25rem;
}

main li {
  margin-bottom: 0.45rem;
}

main li::marker {
  color: var(--muted);
}

main li strong {
  font-weight: 700;
  color: var(--heading);
}

.note {
  margin-top: 1.5rem;
  padding: 0.85rem 1rem 0.95rem;
  font-size: 0.875rem;
  line-height: 1.6;
  color: var(--muted);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  border-left-width: 3px;
  border-left-color: var(--accent);
}

.note__label {
  display: block;
  margin-bottom: 0.4rem;
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.01em;
  color: var(--heading);
}

.note strong:not(.note__label) {
  font-weight: 700;
  color: var(--heading);
}

/* —— Mobile: top bar + off-canvas sidebar —— */
@media (max-width: 767px) {
  .mobile-topbar {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    position: sticky;
    top: 0;
    z-index: 180;
    padding: 0.5rem 0.75rem;
    background: var(--sidebar-bg);
    border-bottom: 1px solid var(--border);
  }

  .nav-toggle {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.4rem 0.65rem;
    font: inherit;
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--text);
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    cursor: pointer;
    -webkit-tap-highlight-color: transparent;
  }

  .nav-toggle:hover {
    border-color: var(--muted);
  }

  .nav-toggle__icon {
    display: block;
    width: 1rem;
    height: 2px;
    background: currentColor;
    box-shadow: 0 -5px 0 currentColor, 0 5px 0 currentColor;
    border-radius: 1px;
  }

  .nav-toggle__text {
    font-size: 0.8125rem;
  }

  .mobile-topbar__brand {
    font-size: 0.875rem;
    font-weight: 700;
    color: var(--accent);
    text-decoration: none;
  }

  .mobile-topbar__brand:hover {
    text-decoration: underline;
  }

  .site-sidebar {
    transform: translateX(-100%);
    transition: transform 0.2s ease;
    box-shadow: 4px 0 24px rgba(0, 0, 0, 0.08);
  }

  html[dir="rtl"] .site-sidebar {
    transform: translateX(100%);
  }

  html.nav-is-open .site-sidebar {
    transform: translateX(0);
  }

  .nav-backdrop {
    display: block;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity 0.2s ease, visibility 0.2s;
  }

  html.nav-is-open .nav-backdrop {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
  }

  main {
    margin-left: 0;
    margin-right: 0;
    padding-top: 1rem;
  }

  html[dir="rtl"] main {
    margin-right: 0;
  }
}

@media (min-width: 768px) {
  .mobile-topbar {
    display: none !important;
  }

  .nav-backdrop {
    display: none !important;
  }

  .site-sidebar {
    transform: none;
    box-shadow: none;
  }
}

/* Level 5 rubric: clickable keyword spans + modal guides */
.rubric-guide-trigger {
  font-weight: 700;
  color: var(--link, #1565c0);
  cursor: pointer;
  text-decoration: none;
}

.rubric-guide-trigger:hover {
  color: var(--link-hover, #0d47a1);
}

.rubric-guide-trigger:focus-visible {
  color: var(--link-hover, #0d47a1);
  outline: 2px solid rgba(21, 101, 192, 0.35);
  outline-offset: 2px;
}

.rubric-guide-backdrop {
  position: fixed;
  inset: 0;
  z-index: 10000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  background: rgba(0, 0, 0, 0.45);
  backdrop-filter: blur(2px);
}

.rubric-guide-backdrop[hidden] {
  display: none;
}

.rubric-guide-dialog {
  position: relative;
  width: min(36rem, 100%);
  max-height: min(85vh, 32rem);
  overflow: auto;
  padding: 1.25rem 1.35rem 1.35rem;
  border-radius: 10px;
  background: var(--surface, #fff);
  color: var(--text, #1a1a1a);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.18);
}

.rubric-guide-close {
  position: absolute;
  top: 0.35rem;
  right: 0.45rem;
  width: 2.25rem;
  height: 2.25rem;
  border: none;
  border-radius: 6px;
  background: transparent;
  font-size: 1.5rem;
  line-height: 1;
  cursor: pointer;
  color: var(--muted, #666);
}

.rubric-guide-close:hover,
.rubric-guide-close:focus-visible {
  background: rgba(0, 0, 0, 0.06);
  color: var(--text, #1a1a1a);
}

.rubric-guide-title {
  margin: 0 2rem 0.65rem 0;
  font-size: 1.1rem;
  font-weight: 700;
  line-height: 1.3;
}

.rubric-guide-body {
  font-size: 0.9375rem;
  line-height: 1.55;
}

.rubric-guide-body .rubric-guide-lead {
  margin: 0 0 0.65rem;
}

.rubric-guide-body .rubric-guide-list {
  margin: 0;
  padding-left: 1.2rem;
}

.rubric-guide-body .rubric-guide-list li {
  margin-bottom: 0.4rem;
}

html[dir="rtl"] .rubric-guide-close {
  right: auto;
  left: 0.45rem;
}

html[dir="rtl"] .rubric-guide-title {
  margin-left: 2rem;
  margin-right: 0;
}

html[dir="rtl"] .rubric-guide-body .rubric-guide-list {
  padding-left: 0;
  padding-right: 1.2rem;
}