/* Grammar 101 — CEFR-ladder reference lessons (reader shell) */

body.reader.grammar-101-page {
  height: auto;
  min-height: 100dvh;
  max-height: none;
  overflow-x: hidden;
  overflow-y: auto;
}

body.reader.grammar-101-page .reader-flow {
  flex: 1 1 auto;
  min-height: 0;
  overflow: visible;
}

body.reader.grammar-101-page .reader-foot {
  flex-shrink: 0;
}

body.reader.grammar-101-page .reader-logo,
body.reader.grammar-101-page .reader-fs-btn,
body.reader.grammar-101-page .reader-h1-en {
  font-family: var(--font-ui), system-ui, sans-serif;
}

body.reader.grammar-101-page .grammar-shell .reader-h1-en {
  margin: 0 0 14px;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--ink-soft, #64748b);
  direction: ltr;
  text-align: left;
}

.grammar-dock {
  flex-shrink: 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 6px 8px;
  padding: 10px clamp(12px, 3vw, 28px);
  background: rgba(250, 252, 251, 0.96);
  border-bottom: 1px solid var(--line);
}

.grammar-dock a {
  font-family: "Tajawal", system-ui, sans-serif;
  font-size: 12px;
  font-weight: 700;
  padding: 6px 12px;
  border-radius: 999px;
  text-decoration: none;
  color: var(--ink-soft);
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.85);
  transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}

.grammar-dock a:hover {
  color: var(--ink);
  border-color: #c9c3b8;
  background: var(--paper);
}

.grammar-dock a[aria-current="page"] {
  color: #fff;
  background: #0f766e;
  border-color: #0f766e;
}

.grammar-shell {
  width: 100%;
  max-width: 48rem;
  margin-inline: auto;
  padding: clamp(18px, 3vw, 32px) var(--reader-inset);
  padding-bottom: calc(28px + env(safe-area-inset-bottom, 0px));
}

.grammar-cefr-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: center;
  margin: 0 0 1.5rem;
  padding: 0;
  list-style: none;
}

.grammar-cefr-nav a {
  font-family: var(--font-ui);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-decoration: none;
  padding: 6px 12px;
  border-radius: 999px;
  border: 1px solid var(--line);
  color: var(--ink);
  background: rgba(255, 255, 255, 0.75);
}

.grammar-cefr-nav a:hover {
  border-color: #0f766e;
  color: #0f766e;
}

.grammar-cefr-section {
  margin-bottom: 2rem;
  scroll-margin-top: 5rem;
}

.grammar-cefr-section__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.5rem 1rem;
  margin-bottom: 1rem;
  padding-bottom: 0.65rem;
  border-bottom: 2px solid rgba(15, 118, 110, 0.2);
}

.grammar-cefr-section__title {
  margin: 0;
  font-size: 1.15rem;
  font-weight: 800;
  font-family: "Tajawal", system-ui, sans-serif;
}

.grammar-cefr-section__title-en {
  margin: 0;
  font-family: var(--font-ui);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink-soft);
}

.grammar-cefr-badge {
  margin-inline-start: auto;
  font-family: var(--font-ui);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.08em;
  padding: 4px 10px;
  border-radius: 8px;
  color: #fff;
}

.grammar-cefr-badge--a1 {
  background: linear-gradient(135deg, #0f766e, #14b8a6);
}
.grammar-cefr-badge--a2 {
  background: linear-gradient(135deg, #0369a1, #0ea5e9);
}
.grammar-cefr-badge--b1 {
  background: linear-gradient(135deg, #b45309, #c9a227);
  color: #1a1204;
}
.grammar-cefr-badge--b2 {
  background: linear-gradient(135deg, #c2410c, #e07a5f);
}
.grammar-cefr-badge--c1 {
  background: linear-gradient(135deg, #5b21b6, #7c3aed);
}
.grammar-cefr-badge--c2 {
  background: linear-gradient(135deg, #1e1b4b, #4338ca);
}

.grammar-topic-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.grammar-topic-list a {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.35rem 0.75rem;
  align-items: baseline;
  text-decoration: none;
  padding: 0.55rem 0.65rem;
  border-radius: 10px;
  border: 1px solid rgba(13, 45, 107, 0.08);
  background: rgba(255, 255, 255, 0.72);
  color: inherit;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.grammar-topic-list a:hover {
  border-color: rgba(15, 118, 110, 0.35);
  box-shadow: 0 4px 14px rgba(15, 118, 110, 0.08);
}

.grammar-topic-list__num {
  font-family: var(--font-ui);
  font-size: 12px;
  font-weight: 800;
  color: var(--pop);
  font-variant-numeric: tabular-nums;
}

.grammar-topic-list__titles {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.grammar-topic-list__ar {
  font-family: "Tajawal", system-ui, sans-serif;
  font-weight: 700;
  font-size: 0.92rem;
}

.grammar-topic-list__en {
  font-family: var(--font-reading);
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--ink-soft);
}

.grammar-article__badge {
  display: inline-flex;
  margin: 0 0 10px;
  font-family: var(--font-ui);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.06em;
  padding: 4px 12px;
  border-radius: 999px;
  color: #fff;
  background: linear-gradient(90deg, #0f766e, #14b8a6);
}

.grammar-article__badge--a2 {
  background: linear-gradient(90deg, #0369a1, #0ea5e9);
}
.grammar-article__badge--b1 {
  background: linear-gradient(90deg, #b45309, #c9a227);
  color: #1a1204;
}
.grammar-article__badge--b2 {
  background: linear-gradient(90deg, #c2410c, #e07a5f);
}
.grammar-article__badge--c1 {
  background: linear-gradient(90deg, #5b21b6, #7c3aed);
}
.grammar-article__badge--c2 {
  background: linear-gradient(90deg, #312e81, #4338ca);
}

.grammar-article__meta {
  font-family: "Tajawal", system-ui, sans-serif;
  font-size: 0.84rem;
  color: var(--ink-soft);
  margin: 0 0 1rem;
  line-height: 1.55;
}

.grammar-block {
  margin: 0 0 1.25rem;
  padding: 1rem 1.1rem;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.88);
  box-shadow: var(--shadow-sm);
}

.grammar-block h2 {
  margin: 0 0 0.5rem;
  font-family: "Tajawal", system-ui, sans-serif;
  font-size: 1rem;
  font-weight: 800;
  color: #0d3d38;
}

.grammar-block h2 small {
  display: block;
  margin-top: 4px;
  font-family: var(--font-ui);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink-soft);
}

.grammar-block--form {
  border-color: rgba(168, 93, 44, 0.28);
  background: linear-gradient(165deg, #fffefb 0%, #faf6f0 100%);
}

.grammar-block--examples {
  border-color: rgba(15, 118, 110, 0.22);
  background: linear-gradient(185deg, #f8fefc 0%, #f5faf9 100%);
}

.grammar-block--mistakes {
  border-color: rgba(194, 65, 12, 0.25);
  background: linear-gradient(165deg, #fffaf5 0%, #fff5ed 100%);
}

.grammar-block p,
.grammar-block li {
  font-size: 0.94rem;
  line-height: 1.62;
}

.grammar-block[dir="ltr"] p,
.grammar-block[dir="ltr"] li {
  font-family: var(--font-reading);
}

.grammar-block ul {
  margin: 0.35rem 0 0;
  padding-inline-start: 1.2rem;
}

.grammar-example-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 0.5rem;
  font-size: 0.88rem;
}

.grammar-example-table th,
.grammar-example-table td {
  border: 1px solid rgba(13, 45, 107, 0.1);
  padding: 0.45rem 0.55rem;
  vertical-align: top;
}

.grammar-example-table th {
  text-align: start;
  font-family: "Tajawal", system-ui, sans-serif;
  font-size: 11px;
  font-weight: 800;
  background: rgba(15, 118, 110, 0.06);
}

.grammar-example-table td:first-child {
  font-family: var(--font-reading);
  font-weight: 500;
}

.grammar-pager {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: space-between;
  margin-top: 2rem;
  padding-top: 1rem;
  border-top: 1px solid var(--line);
}

.grammar-pager a {
  font-family: "Tajawal", system-ui, sans-serif;
  font-size: 13px;
  font-weight: 700;
  color: #0f766e;
  text-decoration: none;
}

.grammar-pager a:hover {
  text-decoration: underline;
}

.grammar-hero-lede {
  font-family: "Tajawal", system-ui, sans-serif;
  font-size: 0.95rem;
  line-height: 1.65;
  color: var(--ink);
  margin: 0 0 1.25rem;
}

.grammar-ladder-note {
  margin: 0 0 1.5rem;
  padding: 0.85rem 1rem;
  border-radius: 12px;
  border-inline-start: 3px solid rgba(15, 118, 110, 0.45);
  background: rgba(248, 250, 252, 0.95);
  font-size: 0.87rem;
  line-height: 1.62;
  color: var(--ink);
}

/* ——— Interactive / Arabic-first v2 ——— */
.grammar-lead {
  margin: 0 0 1rem;
  padding: 1rem 1.15rem;
  border-radius: 14px;
  border: 1px solid rgba(15, 118, 110, 0.25);
  background: linear-gradient(145deg, rgba(240, 253, 250, 0.9) 0%, rgba(255, 255, 255, 0.95) 100%);
  font-family: "Tajawal", system-ui, sans-serif;
  font-size: 0.95rem;
  line-height: 1.75;
  color: var(--ink);
}

.grammar-lead p {
  margin: 0 0 0.65rem;
}

.grammar-lead p:last-child {
  margin-bottom: 0;
}

.grammar-details {
  margin: 0 0 0.65rem;
  border-radius: 12px;
  border: 1px solid rgba(13, 45, 107, 0.12);
  background: rgba(255, 255, 255, 0.92);
  overflow: hidden;
}

.grammar-details--soft summary {
  background: rgba(15, 118, 110, 0.06);
}

.grammar-details summary {
  cursor: pointer;
  font-family: "Tajawal", system-ui, sans-serif;
  font-weight: 800;
  font-size: 0.9rem;
  padding: 0.65rem 1rem;
  list-style: none;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.grammar-details summary::-webkit-details-marker {
  display: none;
}

.grammar-details summary::before {
  content: "＋";
  font-weight: 400;
  opacity: 0.55;
  font-size: 1rem;
}

.grammar-details[open] summary::before {
  content: "－";
}

.grammar-details__body {
  padding: 0 1rem 1rem;
  font-size: 0.9rem;
  line-height: 1.65;
  border-top: 1px solid rgba(13, 45, 107, 0.06);
}

.grammar-details__body p {
  margin: 0.55rem 0 0;
}

.grammar-details__body[dir="ltr"] {
  font-family: var(--font-reading);
}

.grammar-dual {
  display: grid;
  gap: 1rem;
}

@media (min-width: 640px) {
  .grammar-dual {
    grid-template-columns: 1fr 1fr;
    gap: 1.15rem;
  }
}

.grammar-dual__col {
  padding: 0.85rem 1rem;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.92);
}

.grammar-dual__label {
  font-family: "Tajawal", system-ui, sans-serif;
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.06em;
  color: #0f766e;
  margin: 0 0 0.55rem;
}

.grammar-dual__col--en .grammar-dual__label {
  font-family: var(--font-ui);
}

.grammar-checklist {
  list-style: none;
  margin: 0.5rem 0 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}

.grammar-checklist label {
  display: flex;
  align-items: flex-start;
  gap: 0.55rem;
  cursor: pointer;
  font-family: "Tajawal", system-ui, sans-serif;
  font-size: 0.88rem;
  line-height: 1.45;
}

.grammar-checklist input {
  margin-top: 0.25rem;
  accent-color: #0f766e;
  flex-shrink: 0;
}

.grammar-mcq {
  margin-top: 0.75rem;
  padding: 1rem;
  border-radius: 14px;
  border: 1px solid rgba(91, 33, 182, 0.2);
  background: linear-gradient(165deg, #faf5ff 0%, #ffffff 100%);
}

.grammar-mcq__q {
  font-family: "Tajawal", system-ui, sans-serif;
  font-weight: 700;
  margin: 0 0 0.75rem;
  font-size: 0.92rem;
  line-height: 1.5;
}

.grammar-mcq__opts {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin-bottom: 0.85rem;
}

.grammar-mcq__opt {
  display: flex;
  align-items: baseline;
  gap: 0.45rem;
  padding: 0.45rem 0.55rem;
  border-radius: 10px;
  border: 1px solid rgba(13, 45, 107, 0.08);
  background: rgba(255, 255, 255, 0.92);
  cursor: pointer;
  font-size: 0.88rem;
}

.grammar-mcq__opt:hover {
  border-color: rgba(91, 33, 182, 0.25);
}

.grammar-mcq__check {
  font-family: "Tajawal", system-ui, sans-serif;
  font-weight: 800;
  font-size: 0.84rem;
  padding: 0.5rem 1.1rem;
  border-radius: 999px;
  border: none;
  background: linear-gradient(90deg, #5b21b6, #7c3aed);
  color: #fff;
  cursor: pointer;
  margin-bottom: 0.5rem;
}

.grammar-mcq__check:active {
  transform: scale(0.98);
}

.grammar-mcq__feedback {
  margin: 0;
  font-family: "Tajawal", system-ui, sans-serif;
  font-size: 0.86rem;
  line-height: 1.5;
  padding: 0.55rem 0.65rem;
  border-radius: 10px;
}

.grammar-mcq__feedback--ok {
  background: rgba(15, 118, 110, 0.12);
  color: #0f5132;
}

.grammar-mcq__feedback--no {
  background: rgba(194, 65, 12, 0.12);
  color: #9a3412;
}

.grammar-mcq__feedback--muted {
  background: rgba(100, 116, 139, 0.12);
  color: #475569;
}

.grammar-mcq__why {
  margin: 0.65rem 0 0;
  font-family: "Tajawal", system-ui, sans-serif;
  font-size: 0.82rem;
  color: var(--ink-soft);
  line-height: 1.55;
}

.grammar-steps {
  list-style: decimal;
  margin: 0.35rem 0 0;
  padding-inline-start: 1.35rem;
  font-family: "Tajawal", system-ui, sans-serif;
  font-size: 0.9rem;
  line-height: 1.58;
}

.grammar-subhead {
  font-family: "Tajawal", system-ui, sans-serif;
  font-size: 0.92rem;
  margin: 1rem 0 0.4rem;
}

.grammar-shell--structured .grammar-block[tabindex="-1"],
.grammar-shell--structured .grammar-takeaway[tabindex="-1"] {
  scroll-margin-top: 4.5rem;
}

.grammar-lesson-outline {
  margin: 0 0 1.25rem;
  padding: 0.75rem 1rem;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.92);
  box-shadow: var(--shadow-sm);
}

.grammar-lesson-outline__label {
  display: block;
  font-family: "Tajawal", system-ui, sans-serif;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0;
  color: var(--ink-soft);
  margin-bottom: 0.45rem;
}

.grammar-lesson-outline ol {
  margin: 0;
  padding-inline-start: 1.25rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 0.75rem;
  font-family: "Tajawal", system-ui, sans-serif;
  font-size: 0.82rem;
  font-weight: 700;
}

.grammar-lesson-outline a {
  color: #0d3d38;
  text-decoration: none;
}

.grammar-lesson-outline a:hover {
  text-decoration: underline;
}

.grammar-explain p {
  margin: 0 0 0.75rem;
  font-family: "Tajawal", system-ui, sans-serif;
  font-size: 0.95rem;
  line-height: 1.78;
  color: var(--ink);
}

.grammar-explain p:last-child {
  margin-bottom: 0;
}

.grammar-explain .grammar-study-path {
  margin: 0 0 1rem;
  padding: 0.65rem 0.9rem;
  border-radius: 12px;
  border-inline-start: 4px solid #0f766e;
  background: rgba(240, 253, 250, 0.82);
  font-family: "Tajawal", system-ui, sans-serif;
  font-size: 0.88rem;
  line-height: 1.62;
  font-weight: 600;
  color: var(--ink);
}

.grammar-explain .grammar-study-path--a1 {
  border-inline-start-color: #047857;
  background: rgba(236, 253, 245, 0.92);
}

.grammar-explain .grammar-study-path--a2 {
  border-inline-start-color: #0d9488;
  background: rgba(240, 253, 250, 0.88);
}

.grammar-explain .grammar-study-path--b2 {
  border-inline-start-color: #0369a1;
  background: rgba(224, 242, 254, 0.85);
}

.grammar-explain .grammar-study-path--high {
  border-inline-start-color: #6d28d9;
  background: rgba(237, 233, 254, 0.88);
}

.grammar-explain .grammar-cefr-note--tail {
  margin: 0.75rem 0 0;
  padding: 0.55rem 0.85rem;
  border-radius: 10px;
  border-inline-start: 3px solid #92400e;
  background: rgba(254, 243, 199, 0.65);
  font-size: 0.86rem;
  font-weight: 500;
  line-height: 1.65;
}

.grammar-goal-list,
.grammar-when-list,
.grammar-slip-list {
  margin: 0.25rem 0 0;
  padding-inline-start: 1.2rem;
  font-family: "Tajawal", system-ui, sans-serif;
  font-size: 0.92rem;
  line-height: 1.65;
}

.grammar-rule-list {
  margin: 0.25rem 0 0;
  padding-inline-start: 1.35rem;
  font-family: "Tajawal", system-ui, sans-serif;
  font-size: 0.92rem;
  line-height: 1.68;
}

.grammar-rule-list li {
  margin-bottom: 0.45rem;
}

.grammar-skeleton {
  font-family: var(--font-reading), Georgia, serif;
  font-size: 0.9rem;
  line-height: 1.65;
  padding: 0.85rem 1rem;
  border-radius: 12px;
  border: 1px dashed rgba(168, 93, 44, 0.45);
  background: rgba(255, 251, 245, 0.95);
  margin-bottom: 0.65rem;
}

.grammar-dual--tight {
  margin-top: 0.5rem;
}

.grammar-details--tight {
  margin-top: 0.5rem;
}

.grammar-takeaway {
  margin: 0 0 1.25rem;
  padding: 1rem 1.15rem;
  border-radius: 14px;
  border: 2px solid rgba(15, 118, 110, 0.35);
  background: linear-gradient(145deg, rgba(236, 253, 245, 0.95) 0%, #ffffff 100%);
}

.grammar-takeaway__title {
  margin: 0 0 0.5rem;
  font-family: "Tajawal", system-ui, sans-serif;
  font-size: 1rem;
  font-weight: 800;
  color: #0d3d38;
}

.grammar-takeaway__body {
  margin: 0;
  font-family: "Tajawal", system-ui, sans-serif;
  font-size: 0.95rem;
  line-height: 1.7;
  font-weight: 600;
}

.grammar-reminder {
  margin-top: 0.75rem;
  font-size: 0.86rem;
  color: var(--ink-soft);
  line-height: 1.55;
}

.grammar-block--interactive {
  border-color: rgba(91, 33, 182, 0.18);
  background: linear-gradient(180deg, #fefce8 0%, #ffffff 55%);
}

.grammar-block--ar-focus {
  border-color: rgba(15, 118, 110, 0.28);
  background: linear-gradient(165deg, #f0fdfa 0%, #ffffff 100%);
}

/* ——— Play mode: progress, motion, Duolingo-style feedback ——— */

html:has(.grammar-shell--play) {
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html:has(.grammar-shell--play) {
    scroll-behavior: auto;
  }
}

.grammar-shell--play {
  padding-bottom: calc(5.5rem + env(safe-area-inset-bottom, 0px));
}

.grammar-play-dock {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 35;
  padding: 10px 16px calc(12px + env(safe-area-inset-bottom, 0px));
  background: linear-gradient(180deg, rgba(255, 255, 255, 0) 0%, rgba(255, 255, 255, 0.92) 28%, #f8fafc 100%);
  border-top: 1px solid rgba(13, 45, 107, 0.08);
  box-shadow: 0 -12px 32px rgba(15, 23, 42, 0.06);
}

.grammar-play-dock__track {
  height: 11px;
  border-radius: 999px;
  background: rgba(15, 118, 110, 0.14);
  overflow: hidden;
  margin-bottom: 0.4rem;
}

.grammar-play-dock__fill {
  height: 100%;
  width: 0%;
  border-radius: inherit;
  background: linear-gradient(90deg, #0f766e, #2dd4bf 55%, #5eead4);
  box-shadow: 0 0 18px rgba(45, 212, 191, 0.45);
  transition: width 0.5s cubic-bezier(0.22, 1, 0.36, 1);
}

.grammar-play-dock__row {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.35rem 0.75rem;
}

.grammar-play-dock__steps {
  font-family: "Tajawal", system-ui, sans-serif;
  font-size: 0.78rem;
  font-weight: 800;
  color: #0f766e;
}

.grammar-play-dock__hint {
  font-family: "Tajawal", system-ui, sans-serif;
  font-size: 0.74rem;
  font-weight: 600;
  color: var(--ink-soft, #64748b);
  max-width: 100%;
  text-align: end;
}

.grammar-lesson-outline__steps a {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.2rem 0.45rem;
  border-radius: 999px;
  border: 1px solid transparent;
  transition: background 0.18s ease, border-color 0.18s ease, transform 0.18s ease;
}

.grammar-lesson-outline__steps a.is-active {
  background: rgba(15, 118, 110, 0.16);
  border-color: rgba(15, 118, 110, 0.35);
  color: #0a4f4a;
}

.grammar-lesson-outline__steps a.is-done:not(.is-active) {
  opacity: 0.88;
}

.grammar-lesson-outline__steps a.is-done::after {
  content: "✓";
  font-size: 0.65em;
  font-weight: 900;
  color: #0f766e;
}

@keyframes grammar-section-nudge {
  0% {
    transform: scale(1);
    box-shadow: var(--shadow-sm);
  }
  35% {
    transform: scale(1.01);
    box-shadow: 0 10px 32px rgba(15, 118, 110, 0.12);
  }
  100% {
    transform: scale(1);
    box-shadow: var(--shadow-sm);
  }
}

.grammar-section--nudge {
  animation: grammar-section-nudge 0.55s cubic-bezier(0.22, 1, 0.36, 1);
}

.grammar-confetti {
  position: fixed;
  width: 1px;
  height: 1px;
  pointer-events: none;
  z-index: 45;
  overflow: visible;
}

.grammar-confetti__piece {
  position: absolute;
  left: 0;
  top: 0;
  width: 8px;
  height: 8px;
  border-radius: 2px;
  margin: -4px 0 0 -4px;
  animation: grammar-confetti-fly 0.95s ease-out forwards;
}

@keyframes grammar-confetti-fly {
  from {
    transform: translate(0, 0) rotate(0deg);
    opacity: 1;
  }
  to {
    transform: translate(var(--dx), var(--dy)) rotate(520deg);
    opacity: 0;
  }
}

.grammar-toast {
  position: fixed;
  left: 50%;
  bottom: calc(88px + env(safe-area-inset-bottom, 0px));
  transform: translateX(-50%) translateY(12px);
  z-index: 46;
  margin: 0;
  padding: 0.55rem 1.1rem;
  border-radius: 999px;
  font-family: "Tajawal", system-ui, sans-serif;
  font-size: 0.84rem;
  font-weight: 800;
  color: #fff;
  background: linear-gradient(90deg, #0f766e, #0d9488);
  box-shadow: 0 10px 36px rgba(15, 118, 110, 0.35);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.28s ease, transform 0.34s cubic-bezier(0.22, 1, 0.36, 1);
}

.grammar-toast--visible {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

.grammar-mcq__opt:has(input:checked) {
  border-color: rgba(91, 33, 182, 0.45);
  box-shadow: 0 0 0 2px rgba(124, 58, 237, 0.15);
  background: linear-gradient(135deg, #faf5ff 0%, #ffffff 100%);
}

.grammar-mcq__opt:active {
  transform: scale(0.99);
}

.grammar-mcq__check {
  transition: transform 0.12s ease, box-shadow 0.2s ease;
  box-shadow: 0 4px 18px rgba(91, 33, 182, 0.28);
}

.grammar-mcq__check:hover {
  box-shadow: 0 6px 24px rgba(91, 33, 182, 0.35);
}

.grammar-mcq--correct {
  border-color: rgba(15, 118, 110, 0.45) !important;
  background: linear-gradient(165deg, #ecfdf5 0%, #ffffff 100%) !important;
}

.grammar-mcq--wrong.grammar-mcq--solved-wrong {
  border-color: rgba(194, 65, 12, 0.35);
}

@keyframes grammar-mcq-shake {
  0%,
  100% {
    transform: translateX(0);
  }
  20% {
    transform: translateX(-6px);
  }
  40% {
    transform: translateX(6px);
  }
  60% {
    transform: translateX(-4px);
  }
  80% {
    transform: translateX(4px);
  }
}

.grammar-mcq--shake {
  animation: grammar-mcq-shake 0.38s ease;
}

@keyframes grammar-checklist-pop {
  0% {
    transform: scale(1);
  }
  40% {
    transform: scale(1.02);
  }
  100% {
    transform: scale(1);
  }
}

.grammar-checklist--pop {
  animation: grammar-checklist-pop 0.42s cubic-bezier(0.22, 1, 0.36, 1);
}

.grammar-shell--play .grammar-skeleton {
  animation: grammar-skeleton-glow 4.5s ease-in-out infinite;
}

@keyframes grammar-skeleton-glow {
  0%,
  100% {
    border-color: rgba(168, 93, 44, 0.45);
  }
  50% {
    border-color: rgba(15, 118, 110, 0.38);
  }
}

/* ——— Inline interactive lesson content (gap + word bank) ——— */

.grammar-inline-labs {
  margin-top: 1.15rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.grammar-lab {
  margin: 0;
  padding: 1rem 1.15rem;
  border-radius: 14px;
  border: 2px solid rgba(59, 130, 246, 0.28);
  background: linear-gradient(165deg, rgba(239, 246, 255, 0.95) 0%, #ffffff 100%);
  transition: border-color 0.25s ease, box-shadow 0.25s ease;
}

.grammar-lab--gap {
  border-color: rgba(13, 148, 136, 0.3);
  background: linear-gradient(165deg, rgba(240, 253, 250, 0.9) 0%, #ffffff 100%);
}

.grammar-lab--wordbank {
  border-color: rgba(99, 102, 241, 0.28);
  background: linear-gradient(165deg, rgba(238, 242, 255, 0.92) 0%, #ffffff 100%);
}

.grammar-lab--ok {
  border-color: rgba(15, 118, 110, 0.5);
  box-shadow: 0 0 0 1px rgba(15, 118, 110, 0.12);
}

.grammar-lab--no {
  border-color: rgba(194, 65, 12, 0.4);
}

.grammar-lab__title {
  margin: 0 0 0.45rem;
  font-family: "Tajawal", system-ui, sans-serif;
  font-size: 0.95rem;
  font-weight: 800;
  color: #0d3d38;
  display: flex;
  align-items: center;
  gap: 0.45rem;
}

.grammar-lab__badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.5rem;
  height: 1.5rem;
  border-radius: 8px;
  font-size: 0.8rem;
  background: rgba(15, 118, 110, 0.15);
  color: #0f766e;
}

.grammar-lab--wordbank .grammar-lab__badge {
  background: rgba(99, 102, 241, 0.2);
  color: #4338ca;
}

.grammar-lab__lead {
  margin: 0 0 0.65rem;
  font-family: "Tajawal", system-ui, sans-serif;
  font-size: 0.88rem;
  line-height: 1.55;
  color: var(--ink);
}

.grammar-lab__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 0.65rem;
}

.grammar-lab__check,
.grammar-wb__reset {
  font-family: "Tajawal", system-ui, sans-serif;
  font-weight: 800;
  font-size: 0.8rem;
  padding: 0.45rem 1rem;
  border-radius: 999px;
  border: none;
  cursor: pointer;
  transition: transform 0.12s ease, box-shadow 0.2s ease;
}

.grammar-lab__check {
  background: linear-gradient(90deg, #0f766e, #14b8a6);
  color: #fff;
  box-shadow: 0 4px 16px rgba(15, 118, 110, 0.25);
}

.grammar-lab--wordbank .grammar-lab__check {
  background: linear-gradient(90deg, #4f46e5, #6366f1);
  box-shadow: 0 4px 16px rgba(79, 70, 229, 0.25);
}

.grammar-wb__reset {
  background: rgba(255, 255, 255, 0.95);
  color: #0f172a;
  border: 1px solid rgba(13, 45, 107, 0.15);
}

.grammar-lab__check:active,
.grammar-wb__reset:active {
  transform: scale(0.98);
}

.grammar-gap__line {
  margin: 0;
  font-family: var(--font-reading), Georgia, serif;
  font-size: 1rem;
  line-height: 1.65;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.35rem 0.45rem;
}

.grammar-gap-select {
  font: inherit;
  font-weight: 600;
  padding: 0.4rem 0.65rem;
  border-radius: 10px;
  border: 2px solid rgba(15, 118, 110, 0.35);
  background: rgba(255, 255, 255, 0.98);
  color: var(--ink);
  min-width: 6.5rem;
}

.grammar-lab__feedback {
  margin: 0.55rem 0 0;
  font-family: "Tajawal", system-ui, sans-serif;
  font-size: 0.84rem;
  line-height: 1.5;
  padding: 0.5rem 0.65rem;
  border-radius: 10px;
}

.grammar-lab__feedback--ok {
  background: rgba(15, 118, 110, 0.12);
  color: #0f5132;
}

.grammar-lab__feedback--bad {
  background: rgba(194, 65, 12, 0.12);
  color: #9a3412;
}

.grammar-lab__feedback--muted {
  background: rgba(100, 116, 139, 0.12);
  color: #475569;
}

.grammar-lab__why {
  margin: 0.65rem 0 0;
  font-family: "Tajawal", system-ui, sans-serif;
  font-size: 0.82rem;
  line-height: 1.55;
  color: var(--ink-soft);
}

.grammar-wb__hint {
  margin: 0 0 0.45rem;
  font-size: 0.8rem;
  color: var(--ink-soft);
  font-family: "Tajawal", system-ui, sans-serif;
}

.grammar-wb__slots {
  min-height: 2.85rem;
  padding: 0.55rem;
  border-radius: 12px;
  border: 2px dashed rgba(79, 70, 229, 0.35);
  background: rgba(255, 255, 255, 0.75);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem;
  margin-bottom: 0.5rem;
}

.grammar-wb__bank {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  padding: 0.45rem 0;
}

.grammar-wb__chip {
  font-family: var(--font-reading), Georgia, serif;
  font-size: 0.88rem;
  font-weight: 600;
  padding: 0.42rem 0.72rem;
  border-radius: 999px;
  border: 2px solid rgba(79, 70, 229, 0.25);
  background: #fff;
  color: #0f172a;
  cursor: pointer;
  transition: transform 0.14s ease, box-shadow 0.14s ease, border-color 0.14s ease;
}

.grammar-wb__chip:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 14px rgba(79, 70, 229, 0.15);
  border-color: rgba(79, 70, 229, 0.45);
}

@media (prefers-reduced-motion: reduce) {
  .grammar-play-dock__fill {
    transition: none;
  }

  .grammar-section--nudge,
  .grammar-mcq--shake,
  .grammar-checklist--pop,
  .grammar-confetti__piece {
    animation: none !important;
  }

  .grammar-toast {
    transition: none;
  }

  .grammar-shell--play .grammar-skeleton {
    animation: none;
  }

  .grammar-wb__chip:hover {
    transform: none;
  }
}

/* ——— Beginner-first deck (slide / PowerPoint-style path) ——— */
body.grammar-101-page--beginner #grammar-play-dock {
  display: none !important;
}

body.grammar-101-page--beginner .grammar-lesson--play {
  padding-bottom: 0;
}

body.grammar-101-page--beginner .grammar-page-title {
  font-size: clamp(1.35rem, 4.5vw, 1.85rem);
  line-height: 1.3;
}

.grammar-beginner-deck {
  margin: 0 0 1.5rem;
  padding: 0;
  border-radius: 20px;
  overflow: hidden;
  border: 1px solid rgba(234, 179, 8, 0.4);
  background: linear-gradient(165deg, #fffbeb 0%, #fef3c7 35%, #ffffff 100%);
  box-shadow: 0 14px 44px rgba(180, 83, 9, 0.11);
}

.grammar-beginner-deck__head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem 1rem;
  padding: 0.75rem 1rem;
  background: rgba(255, 255, 255, 0.72);
  border-bottom: 1px solid rgba(180, 83, 9, 0.14);
}

.grammar-beginner-deck__pill {
  font-family: "Tajawal", system-ui, sans-serif;
  font-size: 0.82rem;
  font-weight: 700;
  color: #92400e;
}

.grammar-beginner-deck__counter {
  margin: 0;
  font-family: "Tajawal", system-ui, sans-serif;
  font-size: 0.8rem;
  font-weight: 800;
  color: #78350f;
}

.grammar-beginner-deck__viewport {
  overflow: hidden;
  width: 100%;
}

.grammar-beginner-deck__track {
  display: flex;
  width: calc(var(--deck-slides, 6) * 100%);
  transition: transform 0.4s cubic-bezier(0.22, 1, 0.36, 1);
  will-change: transform;
}

.grammar-slide {
  flex: 0 0 calc(100% / var(--deck-slides, 6));
  box-sizing: border-box;
  padding: 1.15rem 1.25rem 1.35rem;
  min-height: 15rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.grammar-slide__kicker {
  margin: 0 0 0.35rem;
  font-family: "Tajawal", system-ui, sans-serif;
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0.04em;
  color: #b45309;
}

.grammar-slide__title {
  margin: 0 0 0.25rem;
  font-family: "Tajawal", system-ui, sans-serif;
  font-size: 1.45rem;
  font-weight: 900;
  line-height: 1.25;
  color: #0f172a;
}

.grammar-slide__en {
  margin: 0 0 0.75rem;
  font-size: 1rem;
  font-weight: 600;
  color: #475569;
}

.grammar-slide__body {
  margin: 0;
  font-family: "Tajawal", system-ui, sans-serif;
  font-size: 1.02rem;
  line-height: 1.75;
  color: #1e293b;
}

.grammar-slide__body--large {
  font-size: 1.16rem;
  font-weight: 700;
  line-height: 1.65;
}

.grammar-slide__tip {
  margin: 0.85rem 0 0;
  font-size: 0.88rem;
  line-height: 1.55;
  color: #64748b;
}

.grammar-slide__gold {
  margin: 0;
  font-family: "Tajawal", system-ui, sans-serif;
  font-size: 1.12rem;
  font-weight: 700;
  line-height: 1.68;
  padding: 0.85rem 1rem;
  border-radius: 14px;
  background: rgba(254, 243, 199, 0.92);
  border: 1px solid rgba(245, 158, 11, 0.38);
  color: #0f172a;
}

.grammar-slide__example-en {
  margin: 0 0 0.45rem;
  font-family: var(--font-reading), Georgia, serif;
  font-size: 1.12rem;
  font-weight: 700;
  line-height: 1.45;
  color: #0f172a;
}

.grammar-slide__example-ar {
  margin: 0;
  font-family: "Tajawal", system-ui, sans-serif;
  font-size: 1.04rem;
  line-height: 1.65;
  color: #334155;
}

.grammar-slide__pattern {
  margin: 0 0 0.65rem;
  padding: 0.75rem 0.9rem;
  border-radius: 12px;
  background: #0f172a;
  color: #f8fafc;
  font-size: 0.9rem;
  line-height: 1.55;
}

.grammar-slide__pattern * {
  color: inherit;
}

.grammar-slide__jump {
  display: inline-block;
  margin-top: 0.65rem;
  padding: 0.55rem 1rem;
  border-radius: 999px;
  font-family: "Tajawal", system-ui, sans-serif;
  font-weight: 800;
  font-size: 0.92rem;
  text-decoration: none;
  background: #0f766e;
  color: #fff !important;
  border: 2px solid #0f766e;
}

.grammar-slide__jump:hover {
  background: #0d9488;
  border-color: #0d9488;
}

.grammar-slide__fineprint {
  margin: 0.75rem 0 0;
  font-size: 0.82rem;
  color: #64748b;
  line-height: 1.5;
}

.grammar-beginner-deck__controls {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.65rem;
  padding: 0.65rem 1rem 0.85rem;
  background: rgba(255, 255, 255, 0.55);
  border-top: 1px solid rgba(180, 83, 9, 0.12);
}

.grammar-deck-btn {
  font-family: "Tajawal", system-ui, sans-serif;
  font-size: 0.92rem;
  font-weight: 800;
  padding: 0.55rem 1.15rem;
  border-radius: 999px;
  cursor: pointer;
  border: 2px solid transparent;
  transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}

.grammar-deck-btn--primary {
  background: #b45309;
  color: #fff;
  border-color: #b45309;
}

.grammar-deck-btn--primary:hover:not(:disabled) {
  background: #92400e;
  border-color: #92400e;
}

.grammar-deck-btn--secondary {
  background: #fff;
  color: #78350f;
  border-color: rgba(180, 83, 9, 0.35);
}

.grammar-deck-btn--secondary:hover:not(:disabled) {
  border-color: #b45309;
  background: #fffbeb;
}

.grammar-deck-btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.grammar-beginner-deck__keys {
  margin: 0;
  padding: 0 1rem 0.75rem;
  text-align: center;
  font-size: 0.78rem;
  color: #78716c;
}

.grammar-beginner-deck__keys kbd {
  font-family: var(--font-ui), monospace;
  padding: 0.1rem 0.35rem;
  border-radius: 4px;
  border: 1px solid #d6d3d1;
  background: #fafaf9;
}

.grammar-quick-try {
  margin: 0 0 1.5rem;
  padding: 1rem 1.15rem 1.2rem;
  border-radius: 18px;
  border: 2px dashed rgba(15, 118, 110, 0.38);
  background: linear-gradient(180deg, rgba(240, 253, 250, 0.96) 0%, #ffffff 72%);
  box-shadow: 0 8px 28px rgba(15, 118, 110, 0.07);
}

.grammar-quick-try__head {
  margin-bottom: 0.65rem;
}

.grammar-quick-try__title {
  margin: 0 0 0.2rem;
  font-family: "Tajawal", system-ui, sans-serif;
  font-size: 1.2rem;
  font-weight: 900;
  color: #0f766e;
}

.grammar-quick-try__lead {
  margin: 0;
  font-size: 0.92rem;
  color: #475569;
  line-height: 1.55;
}

.grammar-full-lesson {
  margin: 0 0 1.5rem;
  border-radius: 16px;
  border: 1px solid var(--line);
  background: rgba(248, 250, 252, 0.9);
  overflow: hidden;
}

.grammar-full-lesson__summary {
  cursor: pointer;
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  padding: 0.9rem 1rem;
  font-family: "Tajawal", system-ui, sans-serif;
  background: rgba(241, 245, 249, 0.92);
  border-bottom: 1px solid transparent;
}

.grammar-full-lesson__summary::-webkit-details-marker {
  display: none;
}

.grammar-full-lesson__summary-main {
  font-size: 1.02rem;
  font-weight: 900;
  color: #0f172a;
}

.grammar-full-lesson__summary-sub {
  font-size: 0.84rem;
  font-weight: 500;
  color: #64748b;
  line-height: 1.45;
}

.grammar-full-lesson[open] > .grammar-full-lesson__summary {
  border-bottom-color: var(--line);
  background: rgba(255, 255, 255, 0.96);
}

.grammar-full-lesson__body {
  padding: 0.75rem 0.65rem 1rem;
  background: #fff;
}

.grammar-full-lesson__body .grammar-block {
  margin-bottom: 1rem;
}

@media (prefers-reduced-motion: reduce) {
  .grammar-beginner-deck__track {
    transition: none;
  }
}