.page-width {
  width: min(calc(100% - 2rem), var(--page-width));
  margin-inline: auto;
}

.section {
  padding-block: var(--space-8);
}

.section-heading {
  max-width: 45rem;
  margin-bottom: var(--space-7);
}

.section-heading p {
  color: var(--ink-soft);
  font-size: 1.1rem;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: var(--layer-header);
  border-bottom: 1px solid var(--border);
  background: color-mix(in srgb, var(--surface) 94%, transparent);
  backdrop-filter: blur(0.8rem);
  transition: box-shadow 140ms ease, border-color 140ms ease;
}

.site-header.is-stuck {
  border-bottom-color: var(--border-strong);
  box-shadow: 0 0.45rem 1.4rem rgba(20, 62, 54, 0.11);
}

.sticky-sentinel,
.scroll-observer-sentinel {
  display: block;
  width: 1px;
  height: 1px;
  pointer-events: none;
}

.header-bar {
  display: flex;
  min-height: 4.25rem;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  color: var(--ink);
  text-decoration: none;
}

.brand:hover {
  color: var(--ink);
}

.brand-mark {
  display: grid;
  width: 2.75rem;
  height: 2.75rem;
  flex: 0 0 auto;
  place-items: center;
  border-radius: var(--radius-small);
  color: #f8fbfa;
  background: #0c665c;
  font-size: 1.25rem;
  font-weight: 900;
}

.brand strong,
.brand small {
  display: block;
}

.brand strong {
  line-height: 1.1;
}

.brand small {
  margin-top: 0.18rem;
  color: var(--ink-soft);
  font-size: 0.72rem;
}

.desktop-nav {
  display: flex;
  align-items: center;
  gap: clamp(0.7rem, 1.5vw, 1.3rem);
}

.desktop-nav a,
.site-menu nav a {
  color: var(--ink);
  font-weight: 700;
  text-decoration: none;
  white-space: nowrap;
}

.desktop-nav a:hover,
.site-menu nav a:hover {
  color: var(--brand);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.site-menu {
  display: none;
}

.site-tools {
  display: none;
}

.preference-panel,
.utility-controls {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.preference-panel {
  justify-content: flex-end;
}

.desktop-preferences .segmented-control button,
.desktop-preferences .utility-controls {
  white-space: nowrap;
}

.desktop-preferences .utility-controls {
  flex-wrap: nowrap;
}

.desktop-preferences .control-label {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}

.utility-controls {
  flex-wrap: wrap;
}

.control-label {
  color: var(--ink-soft);
  font-size: 0.88rem;
  font-weight: 700;
}

.site-tools > summary,
.site-menu > summary {
  min-height: 2.75rem;
  align-items: center;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-small);
  padding: 0.45rem 0.75rem;
  background: var(--surface);
  font-weight: 800;
  list-style-position: inside;
}

.scroll-controls {
  position: fixed;
  right: max(var(--space-4), env(safe-area-inset-right));
  bottom: max(var(--space-4), env(safe-area-inset-bottom));
  z-index: var(--layer-floating);
  display: flex;
  max-width: calc(100vw - 2rem);
  gap: var(--space-2);
  padding: var(--space-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: color-mix(in srgb, var(--surface) 96%, transparent);
  box-shadow: var(--shadow);
  backdrop-filter: blur(0.8rem);
}

.scroll-controls button {
  display: inline-flex;
  min-height: 2.75rem;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-small);
  padding: 0.55rem 0.75rem;
  color: var(--ink);
  background: var(--surface);
  font-weight: 800;
  line-height: 1.15;
}

.scroll-controls button:hover {
  border-color: var(--brand);
  color: var(--brand-hover);
  background: var(--surface-muted);
}

.scroll-control-icon {
  font-size: 1.15rem;
  line-height: 1;
}

.breadcrumbs {
  padding-block: var(--space-4);
}

.breadcrumbs ol {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin: 0;
  padding: 0;
  list-style: none;
  color: var(--ink-soft);
  font-size: 0.9rem;
}

.breadcrumbs li:not(:last-child)::after {
  margin-inline-start: 0.35rem;
  content: "/";
}

.home-hero {
  padding-block: clamp(2rem, 7vw, 5rem);
}

.home-hero-grid {
  display: grid;
  min-height: min(42rem, calc(100dvh - 10rem));
  grid-template-columns: minmax(0, 0.9fr) minmax(26rem, 1.1fr);
  align-items: center;
  gap: clamp(2rem, 6vw, 5rem);
}

.home-hero-copy .lead {
  max-width: 43rem;
}

.home-hero-copy h1 {
  max-width: 20ch;
  font-size: clamp(2.6rem, 5vw, 4rem);
}

.home-hero-image {
  margin: 0;
}

.home-hero-image img {
  width: 100%;
  aspect-ratio: 1.48;
  border: 1px solid var(--border);
  border-radius: var(--radius-large);
  box-shadow: var(--shadow);
  object-fit: cover;
}

.hero-actions,
.lesson-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-top: var(--space-5);
}

.stat-band {
  border-block: 1px solid var(--border);
  background: var(--surface);
}

.stat-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
}

.stat-grid p {
  display: flex;
  min-height: 7.25rem;
  align-items: baseline;
  justify-content: center;
  gap: var(--space-3);
  margin: 0;
  padding: var(--space-5);
}

.stat-grid p + p {
  border-left: 1px solid var(--border);
}

.stat-grid strong {
  color: var(--brand);
  font-size: clamp(2rem, 5vw, 3.3rem);
  line-height: 1;
}

.stage-grid {
  display: grid;
  grid-template-columns: 1.25fr 0.875fr 0.875fr;
  gap: var(--space-5);
}

.skills-section,
.support-section {
  padding-block: var(--space-8);
  background: var(--surface-muted);
}

.skills-layout {
  display: grid;
  grid-template-columns: 0.75fr 1.25fr;
  align-items: start;
  gap: var(--space-8);
}

.skills-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-5);
}

.course-map {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}

.course-map-stage ol {
  margin: 0;
  padding: 0;
  list-style: none;
}

.course-map-stage li {
  display: grid;
  grid-template-columns: 2.5rem 1fr;
  gap: var(--space-3);
  padding-block: var(--space-3);
  border-bottom: 1px solid var(--border);
}

.course-map-stage li > span {
  font-weight: 900;
}

.course-map-stage strong,
.course-map-stage small {
  display: block;
}

.course-map-stage small {
  margin-top: var(--space-1);
  color: var(--ink-soft);
}

.support-layout,
.unit-hero-grid,
.lesson-hero-grid,
.page-hero {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(20rem, 0.8fr);
  align-items: center;
  gap: var(--space-8);
}

.arabic-preview {
  border-inline-start: 0.35rem solid var(--brand);
  padding: var(--space-6);
  border-radius: var(--radius);
  background: var(--surface);
  font-family: var(--font-arabic);
  font-size: 1.12rem;
}

.first-lesson-cta {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: var(--space-6);
  margin-block: var(--space-8);
  padding: var(--space-7);
  border-radius: var(--radius-large);
  color: #f8fbfa;
  background: #0c5149;
}

.first-lesson-cta h2,
.first-lesson-cta p {
  color: inherit;
}

.page-hero,
.unit-hero,
.lesson-hero {
  padding-block: var(--space-8);
}

.compact-hero {
  min-height: 22rem;
  grid-template-columns: minmax(0, 48rem);
}

.unit-hero,
.lesson-hero {
  background: var(--surface-muted);
}

.unit-purpose,
.essential-question,
.stage-skill-panel {
  padding: var(--space-6);
  border: 1px solid var(--border);
  border-radius: var(--radius-large);
  background: var(--surface);
  box-shadow: var(--shadow);
}

.unit-note {
  margin-top: var(--space-7);
  padding: var(--space-6);
  border-left: 0.35rem solid var(--foundation);
  background: var(--surface);
}

.unit-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-5);
}

.lesson-card-grid {
  display: grid;
  gap: var(--space-4);
}

.page-navigation,
.previous-next {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding-block: var(--space-7);
}

.page-navigation a,
.previous-next a {
  font-weight: 800;
}

.teacher-resource-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: var(--space-5);
  padding-bottom: var(--space-7);
}

.teacher-resource-grid article:last-child {
  grid-column: 1 / -1;
}

.site-footer {
  margin-top: var(--space-8);
  border-top: 1px solid var(--border);
  padding-block: var(--space-7);
  padding-bottom: calc(var(--space-7) + 4rem + env(safe-area-inset-bottom));
  background: var(--surface);
}

.footer-grid {
  display: grid;
  grid-template-columns: 0.65fr 1fr 1.15fr;
  gap: var(--space-7);
}

.footer-grid nav {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  align-content: start;
  gap: var(--space-2) var(--space-5);
}

.footer-grid a {
  color: var(--ink);
}

.privacy-note {
  color: var(--ink-soft);
  font-size: 0.9rem;
}

@media (max-width: 78rem) {
  .desktop-nav {
    display: none;
  }

  .site-menu {
    display: block;
    position: relative;
  }

  .site-tools {
    display: block;
    position: relative;
  }

  .desktop-preferences {
    display: none;
  }

  .site-tools > summary,
  .site-menu > summary {
    display: flex;
  }

  .site-menu nav,
  .site-tools .preference-panel {
    position: absolute;
    top: calc(100% + var(--space-2));
    right: 0;
    z-index: var(--layer-menu);
    width: min(19rem, calc(100vw - 2rem));
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: var(--space-5);
    background: var(--surface);
    box-shadow: var(--shadow);
  }

  .site-menu nav {
    display: grid;
    gap: var(--space-3);
  }

  .site-tools .preference-panel {
    display: grid;
    width: min(31rem, calc(100vw - 2rem));
    gap: var(--space-4);
  }

  .site-tools .utility-controls {
    justify-content: end;
  }
}

@media (max-width: 64rem) {
  .home-hero-grid,
  .support-layout,
  .unit-hero-grid,
  .lesson-hero-grid,
  .page-hero {
    grid-template-columns: 1fr;
  }

  .home-hero-grid {
    min-height: auto;
  }

  .home-hero-image {
    order: -1;
  }

  .stage-grid,
  .course-map {
    grid-template-columns: 1fr;
  }

  .skills-layout {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 48rem) {
  .page-width {
    width: min(calc(100% - 1.25rem), var(--page-width));
  }

  .section,
  .skills-section,
  .support-section,
  .page-hero,
  .unit-hero,
  .lesson-hero {
    padding-block: var(--space-7);
  }

  .brand small {
    display: none;
  }

  .utility-controls {
    align-items: stretch;
  }

  .utility-controls {
    display: grid;
    grid-template-columns: auto auto auto 1fr;
  }

  .site-tools .preference-panel {
    position: fixed;
    top: calc(var(--sticky-header-height) + var(--space-2));
    right: max(var(--space-2), env(safe-area-inset-right));
    left: max(var(--space-2), env(safe-area-inset-left));
    width: auto;
  }

  .brand-mark {
    width: 2.45rem;
    height: 2.45rem;
  }

  .scroll-controls {
    right: max(var(--space-2), env(safe-area-inset-right));
    bottom: max(var(--space-2), env(safe-area-inset-bottom));
    left: max(var(--space-2), env(safe-area-inset-left));
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .scroll-controls button {
    width: 100%;
    padding-inline: var(--space-2);
  }

  .stat-grid {
    grid-template-columns: 1fr;
  }

  .stat-grid p {
    min-height: auto;
    justify-content: flex-start;
  }

  .stat-grid p + p {
    border-top: 1px solid var(--border);
    border-left: 0;
  }

  .skills-grid,
  .unit-grid,
  .teacher-resource-grid {
    grid-template-columns: 1fr;
  }

  .teacher-resource-grid article:last-child {
    grid-column: auto;
  }

  .first-lesson-cta {
    grid-template-columns: 1fr;
    margin-inline: auto;
    padding: var(--space-6);
  }

  .page-navigation,
  .previous-next,
  .footer-grid {
    display: grid;
    grid-template-columns: 1fr;
  }
}

@media (max-width: 25rem) {
  .brand strong {
    max-width: 7rem;
    font-size: 0.9rem;
  }

  .site-tools > summary,
  .site-menu > summary {
    padding-inline: var(--space-2);
    font-size: 0.86rem;
  }

  .header-bar {
    gap: var(--space-2);
  }
}