/* ============================================================
   Learn Languages — Main Frontend Stylesheet  (Kids Edition)
   Scope: /learn/ — BWS UI only, no Bootstrap
   ============================================================ */

/* ---- Tokens ------------------------------------------------ */
:root {
  --lrn-primary:       #7c3aed;
  --lrn-primary-dark:  #5b21b6;
  --lrn-primary-light: #c4b5fd;
  --lrn-secondary:     #06b6d4;
  --lrn-accent:        #f97316;
  --lrn-teal:          #0d9488;
  --lrn-yellow:        #eab308;
  --lrn-green:         #22c55e;
  --lrn-success:       #22c55e;
  --lrn-danger:        #ef4444;
  --lrn-text:          #1e1b4b;
  --lrn-text-muted:    #6b7280;
  --lrn-text-light:    #9ca3af;
  --lrn-bg:            #fef9f0;
  --lrn-bg-alt:        #f3f0ff;
  --lrn-bg-card:       #ffffff;
  --lrn-border:        #e9d5ff;
  --lrn-border-hover:  #c4b5fd;
  --lrn-radius:        1.25rem;
  --lrn-radius-sm:     0.875rem;
  --lrn-radius-lg:     2rem;
  --lrn-shadow:        0 2px 8px rgba(124,58,237,.08), 0 1px 3px rgba(0,0,0,.06);
  --lrn-shadow-md:     0 6px 20px rgba(124,58,237,.12), 0 2px 6px rgba(0,0,0,.07);
  --lrn-shadow-lg:     0 12px 40px rgba(124,58,237,.15), 0 4px 12px rgba(0,0,0,.08);
  --lrn-font:          'Nunito', 'Poppins', system-ui, -apple-system, sans-serif;
  --lrn-font-mono:     'JetBrains Mono', 'Fira Code', monospace;
  --lrn-transition:    0.2s ease;
  --lrn-gap:           1.5rem;
  --lrn-gap-sm:        0.75rem;
  --lrn-gap-lg:        2.5rem;
}

/* ---- Reset & Base ----------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }

body {
  margin: 0;
  font-family: var(--lrn-font);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--lrn-text);
  background: var(--lrn-bg);
  -webkit-font-smoothing: antialiased;
}

a { color: var(--lrn-primary); text-decoration: none; }
a:hover { color: var(--lrn-primary-dark); text-decoration: underline; }

img { max-width: 100%; height: auto; display: block; }

.lrn-lang-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  vertical-align: middle;
  line-height: 1;
}
.lrn-lang-icon svg, .lrn-lang-icon img {
  width: 1.25em;
  height: 1.25em;
  display: block;
  object-fit: contain;
}

h1, h2, h3, h4, h5, h6 {
  margin: 0 0 0.5em;
  font-weight: 800;
  line-height: 1.2;
  color: var(--lrn-text);
}

p { margin: 0 0 1em; }
p:last-child { margin-bottom: 0; }

/* ---- Layout ------------------------------------------------ */
.lrn-container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1rem;
}
@media (min-width: 640px)  { .lrn-container { padding: 0 1.5rem; } }
@media (min-width: 1024px) { .lrn-container { padding: 0 2rem; } }

.lrn-section     { padding: 4rem 0; }
.lrn-section-alt { padding: 4rem 0; background: var(--lrn-bg-alt); }
.lrn-py-xl { padding-top: 4rem; padding-bottom: 4rem; }
.lrn-mt-md { margin-top: 1.5rem; }
.lrn-text-center { text-align: center; }
.lrn-muted { color: var(--lrn-text-muted); }

/* ---- Header / Nav ----------------------------------------- */
.lrn-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,0.97);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(233,213,255,.55);
  box-shadow: 0 2px 20px rgba(124,58,237,.07), 0 1px 4px rgba(0,0,0,.05);
  /* room for the 3px accent bar */
  padding-top: 3px;
}

/* Colourful top accent stripe — mirrors logo palette */
.lrn-header::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg,
    #22c55e  0%,
    #06b6d4 22%,
    #7c3aed 52%,
    #f97316 78%,
    #eab308 100%
  );
}

.lrn-navbar {
  display: flex;
  align-items: center;
  gap: 1rem;
  height: 4.25rem;
}

.lrn-brand {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 1.25rem;
  font-weight: 900;
  color: var(--lrn-primary);
  text-decoration: none;
  flex-shrink: 0;
}
.lrn-brand:hover { color: var(--lrn-primary-dark); text-decoration: none; }
.lrn-brand-icon { font-size: 1.5rem; }

.lrn-brand-hero {
  height: 200px;
  width: auto;
  display: block;
  object-fit: contain;
  /* multiply blends white → transparent on the coloured gradient */
  mix-blend-mode: multiply;
  filter: drop-shadow(0 4px 20px rgba(0,0,0,.18));
  transition: transform .3s cubic-bezier(.34,1.56,.64,1);
}

.lrn-brand-hero:hover {
  transform: scale(1.04) rotate(-1deg);
}

.lrn-brand-logo {
  height: 56px;
  width: auto;
  display: block;
  object-fit: contain;
  /* lift the logo slightly from the white header */
  filter: drop-shadow(0 2px 6px rgba(0,0,0,.10));
  transition: transform .22s cubic-bezier(.34,1.56,.64,1), filter .22s ease;
}

.lrn-brand:hover .lrn-brand-logo {
  transform: scale(1.06);
  filter: drop-shadow(0 4px 14px rgba(124,58,237,.28));
}

.lrn-nav-links {
  display: none;
  align-items: center;
  gap: 0.25rem;
  flex: 1;
  margin-left: 1rem;
}
@media (min-width: 768px) { .lrn-nav-links { display: flex; } }

.lrn-nav-link {
  padding: 0.4rem 0.9rem;
  border-radius: 2rem;
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--lrn-text-muted);
  transition: color var(--lrn-transition), background var(--lrn-transition);
}
.lrn-nav-link:hover {
  color: var(--lrn-primary);
  background: var(--lrn-bg-alt);
  text-decoration: none;
}

.lrn-nav-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-left: auto;
}

/* Navbar install button — hidden until beforeinstallprompt fires */
#btnInstallPwa {
  display: none;
}
#btnInstallPwa.visible {
  display: flex;
}

/* Shared install button style (navbar + banner) */
.lrn-install-btn {
  align-items: center;
  gap: 0.4rem;
  cursor: pointer;
  transition: opacity var(--lrn-transition), transform var(--lrn-transition);
}
.lrn-install-btn:hover { opacity: 0.9; transform: scale(1.04); }

/* ---- Hero ------------------------------------------------- */
.lrn-hero {
  background: linear-gradient(135deg, #0369a1 0%, #7c3aed 35%, #f97316 65%, #eab308 100%);
  color: #fff;
  padding: 5rem 0 5rem;
  text-align: center;
  position: relative;
  overflow: hidden;
}

/* Bouncy blobs */
.lrn-hero::before {
  content: '';
  position: absolute;
  top: -60px;
  right: -60px;
  width: 320px;
  height: 320px;
  border-radius: 50%;
  background: rgba(255,255,255,.06);
  animation: heroBlob 6s ease-in-out infinite;
}
.lrn-hero::after {
  content: '';
  position: absolute;
  bottom: -80px;
  left: -60px;
  width: 400px;
  height: 400px;
  border-radius: 50%;
  background: rgba(255,255,255,.05);
  animation: heroBlob 8s ease-in-out infinite reverse;
}

@keyframes heroBlob {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50%       { transform: translate(20px, 15px) scale(1.05); }
}

.lrn-hero-content { position: relative; z-index: 1; }

.lrn-hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: rgba(255,255,255,0.2);
  border: 1px solid rgba(255,255,255,0.35);
  border-radius: 2rem;
  padding: 0.35rem 1.1rem;
  font-size: 0.85rem;
  font-weight: 800;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin-bottom: 1.25rem;
}

.lrn-hero-title {
  font-size: clamp(2.2rem, 5.5vw, 3.75rem);
  font-weight: 900;
  line-height: 1.08;
  margin-bottom: 1.25rem;
  color: #fff;
  text-shadow: 0 2px 20px rgba(0,0,0,.15);
}

.lrn-hero-subtitle {
  font-size: clamp(1rem, 2.2vw, 1.3rem);
  opacity: 0.92;
  font-weight: 600;
  max-width: 560px;
  margin: 0 auto 2.25rem;
}

.lrn-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.875rem;
  justify-content: center;
}

.lrn-hero-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 2.5rem;
  justify-content: center;
  margin-top: 3.5rem;
  padding-top: 2rem;
  border-top: 1px solid rgba(255,255,255,0.25);
}

.lrn-hero-stat strong {
  display: block;
  font-size: 2rem;
  font-weight: 900;
  color: #fff;
}
.lrn-hero-stat span { font-size: 0.875rem; opacity: 0.8; font-weight: 600; }

/* ---- Buttons (BWS override for kids feel) ----------------- */
.bws-btn-primary,
.lrn-btn-primary {
  background: linear-gradient(135deg, var(--lrn-primary), #a855f7) !important;
  border: none !important;
  border-radius: 2rem !important;
  font-weight: 800 !important;
  font-family: var(--lrn-font) !important;
  transition: transform 0.15s ease, box-shadow 0.15s ease !important;
  box-shadow: 0 4px 14px rgba(124,58,237,.35) !important;
}
.bws-btn-primary:hover, .lrn-btn-primary:hover {
  transform: translateY(-2px) scale(1.02) !important;
  box-shadow: 0 8px 24px rgba(124,58,237,.45) !important;
}
.bws-btn-primary:active { transform: translateY(0) !important; }

/* ---- Section titles --------------------------------------- */
.lrn-section-head {
  text-align: center;
  margin-bottom: 2.75rem;
}
.lrn-section-head h2 {
  font-size: clamp(1.6rem, 3.5vw, 2.5rem);
  font-weight: 900;
  margin-bottom: 0.6rem;
}
.lrn-section-head p {
  color: var(--lrn-text-muted);
  font-size: 1.05rem;
  max-width: 560px;
  margin: 0 auto;
}

/* ---- Categories grid -------------------------------------- */
.lrn-categories-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: var(--lrn-gap);
}

/* Rotating accent colors on category cards */
.lrn-category-card:nth-child(4n+1) { --card-accent: var(--lrn-primary); --card-bg: #f5f3ff; }
.lrn-category-card:nth-child(4n+2) { --card-accent: var(--lrn-teal);    --card-bg: #f0fdfa; }
.lrn-category-card:nth-child(4n+3) { --card-accent: var(--lrn-accent);  --card-bg: #fff7ed; }
.lrn-category-card:nth-child(4n+0) { --card-accent: var(--lrn-secondary);--card-bg: #ecfeff; }

.lrn-category-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 2rem 1.5rem 1.75rem;
  background: var(--card-bg, #f5f3ff);
  border: 2px solid transparent;
  border-radius: var(--lrn-radius);
  box-shadow: var(--lrn-shadow);
  text-decoration: none;
  color: var(--lrn-text);
  transition: border-color var(--lrn-transition), box-shadow var(--lrn-transition), transform var(--lrn-transition);
  position: relative;
  overflow: hidden;
}
.lrn-category-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 4px;
  background: var(--card-accent, var(--lrn-primary));
  border-radius: 4px 4px 0 0;
}
.lrn-category-card:hover {
  border-color: var(--card-accent, var(--lrn-primary));
  box-shadow: var(--lrn-shadow-md);
  transform: translateY(-4px) scale(1.02);
  text-decoration: none;
  color: var(--lrn-text);
}

.lrn-category-icon {
  font-size: 3rem;
  margin-bottom: 0.875rem;
  line-height: 1;
  animation: iconWobble 4s ease-in-out infinite;
}
.lrn-category-card:hover .lrn-category-icon {
  animation: iconBounce 0.5s ease;
}

@keyframes iconWobble {
  0%, 100% { transform: rotate(-2deg); }
  50%       { transform: rotate(2deg); }
}
@keyframes iconBounce {
  0%, 100% { transform: scale(1); }
  40%       { transform: scale(1.25) rotate(5deg); }
  70%       { transform: scale(0.95) rotate(-3deg); }
}

.lrn-category-card h3 {
  font-size: 1.1rem;
  font-weight: 800;
  margin-bottom: 0.35rem;
  color: var(--card-accent, var(--lrn-primary));
}

.lrn-category-card-desc {
  font-size: 0.85rem;
  color: var(--lrn-text-muted);
  margin-bottom: 0.875rem;
  flex: 1;
}

.lrn-category-card-count {
  font-size: 0.8rem;
  font-weight: 800;
  color: var(--card-accent, var(--lrn-primary));
  background: rgba(255,255,255,.7);
  border-radius: 2rem;
  padding: 0.2rem 0.875rem;
  border: 1px solid var(--card-accent, var(--lrn-primary));
}

/* ---- Lessons grid ----------------------------------------- */
.lrn-lessons-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(290px, 1fr));
  gap: var(--lrn-gap);
}

.lrn-lesson-card {
  display: flex;
  flex-direction: column;
  background: var(--lrn-bg-card);
  border: 2px solid var(--lrn-border);
  border-radius: var(--lrn-radius);
  box-shadow: var(--lrn-shadow);
  overflow: hidden;
  transition: border-color var(--lrn-transition), box-shadow var(--lrn-transition), transform var(--lrn-transition);
}
.lrn-lesson-card:hover {
  border-color: var(--lrn-primary-light);
  box-shadow: var(--lrn-shadow-md);
  transform: translateY(-3px);
}

.lrn-lesson-card-img { aspect-ratio: 16/9; overflow: hidden; background: var(--lrn-bg-alt); }
.lrn-lesson-card-img img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.35s ease; }
.lrn-lesson-card:hover .lrn-lesson-card-img img { transform: scale(1.05); }

.lrn-lesson-card-body {
  display: flex;
  flex-direction: column;
  flex: 1;
  padding: 1.25rem;
}

.lrn-lesson-meta {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
}

.lrn-lesson-sub-badge {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 800;
  color: var(--lrn-secondary);
  background: #ecfeff;
  border-radius: 2rem;
  padding: 0.15rem 0.7rem;
}

.lrn-lesson-title {
  font-size: 1.05rem;
  font-weight: 800;
  margin-bottom: 0.5rem;
  line-height: 1.3;
}
.lrn-lesson-title a { color: var(--lrn-text); }
.lrn-lesson-title a:hover { color: var(--lrn-primary); text-decoration: none; }

.lrn-lesson-excerpt {
  font-size: 0.875rem;
  color: var(--lrn-text-muted);
  flex: 1;
  margin-bottom: 1rem;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.lrn-lesson-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  margin-top: auto;
}

.lrn-lesson-phrase-count {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--lrn-text-muted);
  display: flex;
  align-items: center;
  gap: 0.3rem;
}

/* ---- PWA install section ---------------------------------- */
.lrn-section-install {
  padding: 4.5rem 0;
  background: linear-gradient(135deg, #1e1b4b 0%, #4c1d95 50%, #1e1b4b 100%);
  color: #fff;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.lrn-install-promo { display: none; }
.lrn-install-promo.visible { display: block; }

.lrn-section-install h2 {
  color: #fff;
  font-size: clamp(1.5rem, 3vw, 2.25rem);
  margin-bottom: 0.75rem;
}
.lrn-section-install p { color: rgba(255,255,255,.8); margin-bottom: 1.5rem; }

.lrn-install-features {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: center;
  margin-bottom: 2rem;
}

.lrn-install-feature {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.9rem;
  font-weight: 700;
  color: rgba(255,255,255,.9);
}
.lrn-install-feature i { color: var(--lrn-yellow); }

/* ---- Breadcrumb ------------------------------------------- */
.lrn-breadcrumb { padding: 1rem 0; }
.lrn-breadcrumb ol {
  list-style: none;
  margin: 0; padding: 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.25rem;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--lrn-text-muted);
}
.lrn-breadcrumb li { display: flex; align-items: center; }
.lrn-breadcrumb li + li::before { content: '›'; margin-right: 0.25rem; color: var(--lrn-border-hover); font-weight: 700; }
.lrn-breadcrumb a { color: var(--lrn-text-muted); }
.lrn-breadcrumb a:hover { color: var(--lrn-primary); }
.lrn-breadcrumb [aria-current="page"] { color: var(--lrn-primary); font-weight: 800; }

/* ---- Category page ---------------------------------------- */
.lrn-category-header { padding: 1.5rem 0 2rem; border-bottom: 2px solid var(--lrn-border); margin-bottom: 2rem; }
.lrn-category-h1 { font-size: clamp(1.5rem, 3vw, 2.25rem); font-weight: 900; margin-bottom: 0.5rem; }
.lrn-category-sub { font-weight: 600; color: var(--lrn-text-muted); }
.lrn-category-desc-full { color: var(--lrn-text-muted); margin-bottom: 0.75rem; max-width: 720px; }
.lrn-category-stats { font-size: 0.9rem; font-weight: 700; color: var(--lrn-text-muted); }

.lrn-sub-tabs { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-bottom: 2rem; }

.lrn-sub-tab {
  padding: 0.45rem 1.1rem;
  border-radius: 2rem;
  font-size: 0.875rem;
  font-weight: 800;
  color: var(--lrn-text-muted);
  background: var(--lrn-bg-alt);
  border: 2px solid var(--lrn-border);
  transition: all var(--lrn-transition);
  text-decoration: none;
}
.lrn-sub-tab:hover { border-color: var(--lrn-primary); color: var(--lrn-primary); text-decoration: none; }
.lrn-sub-tab.active { background: var(--lrn-primary); border-color: var(--lrn-primary); color: #fff; }

/* ---- Pagination ------------------------------------------- */
.lrn-pagination { display: flex; align-items: center; justify-content: center; gap: 1rem; padding: 2rem 0; }
.lrn-pagination-info { font-size: 0.875rem; font-weight: 700; color: var(--lrn-text-muted); }

/* ---- Lesson page layout ----------------------------------- */
.lrn-lesson-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  padding-bottom: 4rem;
}
@media (min-width: 1024px) {
  .lrn-lesson-layout { grid-template-columns: 1fr 300px; align-items: start; }
}

.lrn-lesson-primary { min-width: 0; }
.lrn-lesson-sidebar { order: 2; }
@media (min-width: 1024px) { .lrn-lesson-sidebar { position: sticky; top: 4.5rem; } }

/* ---- Lesson header ---------------------------------------- */
.lrn-lesson-header { padding: 1rem 0 1.75rem; }

.lrn-lesson-badges { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-bottom: 0.875rem; }

.lrn-lesson-cat-badge {
  font-size: 0.75rem;
  font-weight: 800;
  color: var(--lrn-primary);
  background: var(--lrn-bg-alt);
  border: 2px solid var(--lrn-primary-light);
  border-radius: 2rem;
  padding: 0.2rem 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  text-decoration: none;
}
.lrn-lesson-cat-badge:hover { background: var(--lrn-primary); color: #fff; text-decoration: none; }

.lrn-lesson-sub-badge {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 800;
  color: var(--lrn-secondary);
  background: #ecfeff;
  border-radius: 2rem;
  padding: 0.2rem 0.7rem;
}

.lrn-lesson-h1 { font-size: clamp(1.6rem, 4vw, 2.5rem); font-weight: 900; margin-bottom: 0.875rem; }

.lrn-lesson-meta-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem;
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--lrn-text-muted);
}

.lrn-lesson-date, .lrn-lesson-phrase-count { display: flex; align-items: center; gap: 0.3rem; }

/* ---- Featured image --------------------------------------- */
.lrn-lesson-featured-img {
  margin-bottom: 2rem;
  border-radius: var(--lrn-radius);
  overflow: hidden;
  box-shadow: var(--lrn-shadow-lg);
  border: 3px solid var(--lrn-border);
}
.lrn-lesson-featured-img img { width: 100%; }

/* ---- Article prose ---------------------------------------- */
.lrn-lesson-article.lrn-prose {
  font-size: 1.05rem;
  line-height: 1.8;
  color: var(--lrn-text);
  margin-bottom: 2.5rem;
}

.lrn-prose h2 { font-size: 1.5rem; font-weight: 800; margin: 1.5em 0 0.5em; color: var(--lrn-primary); }
.lrn-prose h3 { font-size: 1.2rem; font-weight: 800; margin: 1.25em 0 0.5em; }
.lrn-prose p  { margin: 0 0 1em; }
.lrn-prose ul, .lrn-prose ol { padding-left: 1.5rem; margin: 0 0 1em; }
.lrn-prose li { margin-bottom: 0.35em; }
.lrn-prose strong { font-weight: 800; color: var(--lrn-primary); }
.lrn-prose em { font-style: italic; }
.lrn-prose a { color: var(--lrn-primary); text-decoration: underline; }
.lrn-prose blockquote {
  margin: 1.5em 0;
  padding: 1rem 1.5rem;
  border-left: 4px solid var(--lrn-primary);
  background: var(--lrn-bg-alt);
  border-radius: 0 var(--lrn-radius-sm) var(--lrn-radius-sm) 0;
  color: var(--lrn-text-muted);
  font-weight: 600;
}
.lrn-prose code { font-family: var(--lrn-font-mono); font-size: 0.9em; background: #f3f0ff; padding: 0.1em 0.4em; border-radius: 0.3em; color: var(--lrn-primary); }
.lrn-prose pre { background: #1e1b4b; color: #e2e8f0; border-radius: var(--lrn-radius); padding: 1rem; overflow-x: auto; }

/* ---- Phrases section -------------------------------------- */
.lrn-phrases-section { margin-bottom: 2.5rem; }

.lrn-phrases-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}

.lrn-phrases-title {
  font-size: 1.35rem;
  font-weight: 900;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin: 0;
  color: var(--lrn-primary);
}

.lrn-phrase-badge {
  font-size: 0.8rem;
  font-weight: 800;
  color: #fff;
  background: linear-gradient(135deg, var(--lrn-primary), var(--lrn-secondary));
  border-radius: 2rem;
  padding: 0.15rem 0.7rem;
}

.lrn-phrases-controls { display: flex; align-items: center; gap: 0.5rem; }

/* ---- Phrase cards ----------------------------------------- */
.lrn-phrase-list { display: flex; flex-direction: column; gap: 1rem; }

/* Rotating accent colors for phrase cards */
.lrn-phrase-card:nth-child(5n+1) { --pc: #f5f3ff; --pb: var(--lrn-primary); }
.lrn-phrase-card:nth-child(5n+2) { --pc: #f0fdfa; --pb: var(--lrn-teal); }
.lrn-phrase-card:nth-child(5n+3) { --pc: #fff7ed; --pb: var(--lrn-accent); }
.lrn-phrase-card:nth-child(5n+4) { --pc: #ecfeff; --pb: var(--lrn-secondary); }
.lrn-phrase-card:nth-child(5n+0) { --pc: #f0fdf4; --pb: var(--lrn-green); }

.lrn-phrase-card {
  display: flex;
  gap: 1rem;
  background: var(--pc, #f5f3ff);
  border: 2px solid transparent;
  border-radius: var(--lrn-radius);
  padding: 1.25rem;
  transition: border-color var(--lrn-transition), box-shadow var(--lrn-transition), transform var(--lrn-transition);
  position: relative;
  overflow: hidden;
}
.lrn-phrase-card::before {
  content: '';
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 5px;
  background: var(--pb, var(--lrn-primary));
  border-radius: 4px 0 0 4px;
}
.lrn-phrase-card:hover {
  border-color: var(--pb, var(--lrn-primary));
  box-shadow: var(--lrn-shadow-md);
  transform: translateX(3px);
}

.lrn-phrase-number {
  flex-shrink: 0;
  width: 2.25rem;
  height: 2.25rem;
  border-radius: 50%;
  background: var(--pb, var(--lrn-primary));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  font-weight: 900;
  color: #fff;
  margin-top: 0.1rem;
  box-shadow: 0 3px 8px rgba(0,0,0,.15);
}

.lrn-phrase-illustration { flex-shrink: 0; width: 90px; }
.lrn-phrase-illustration img {
  width: 90px;
  height: 90px;
  object-fit: cover;
  border-radius: var(--lrn-radius-sm);
  border: 3px solid rgba(255,255,255,.8);
  box-shadow: 0 3px 10px rgba(0,0,0,.12);
}
@media (max-width: 480px) {
  .lrn-phrase-illustration { width: 64px; }
  .lrn-phrase-illustration img { width: 64px; height: 64px; }
}

.lrn-phrase-langs {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 0.875rem;
}

.lrn-phrase-lang { display: flex; flex-direction: column; gap: 0.35rem; }

.lrn-phrase-lang-label {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.72rem;
  font-weight: 800;
  color: var(--pb, var(--lrn-primary));
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.lrn-phrase-flag { font-size: 1.1rem; }

.lrn-phrase-content { display: flex; flex-direction: column; gap: 0.15rem; }

.lrn-phrase-text {
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--lrn-text);
  line-height: 1.35;
  margin: 0;
}

.lrn-phrase-text.lrn-chinese { font-size: 1.35rem; letter-spacing: 0.05em; }

.lrn-phrase-roman { font-size: 1.5rem; color: var(--lrn-text-muted); font-style: italic; margin: 0; font-weight: 600; }

.lrn-phrase-notes {
  font-size: 0.85rem;
  font-weight: 700;
  color: #92400e;
  background: #fffbeb;
  border: 2px solid #fde68a;
  border-radius: var(--lrn-radius-sm);
  padding: 0.5rem 0.875rem;
  display: flex;
  align-items: flex-start;
  gap: 0.4rem;
  margin-top: 0.5rem;
}

.lrn-listen-btn { align-self: flex-start; margin-top: 0.35rem; }

/* ---- Lesson prev/next nav --------------------------------- */
.lrn-lesson-nav {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-top: 2.5rem;
  padding-top: 2rem;
  border-top: 2px solid var(--lrn-border);
}
@media (max-width: 600px) { .lrn-lesson-nav { grid-template-columns: 1fr; } }

.lrn-lesson-nav-prev,
.lrn-lesson-nav-next {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1rem 1.25rem;
  background: var(--lrn-bg-alt);
  border: 2px solid var(--lrn-border);
  border-radius: var(--lrn-radius);
  color: var(--lrn-text);
  text-decoration: none;
  font-weight: 700;
  transition: all var(--lrn-transition);
}
.lrn-lesson-nav-prev:hover, .lrn-lesson-nav-next:hover {
  border-color: var(--lrn-primary);
  background: var(--lrn-bg-alt);
  color: var(--lrn-primary);
  text-decoration: none;
  transform: scale(1.02);
}
.lrn-lesson-nav-next { justify-content: flex-end; text-align: right; }
.lrn-lesson-nav-prev span, .lrn-lesson-nav-next span { display: flex; flex-direction: column; }
.lrn-lesson-nav-prev small, .lrn-lesson-nav-next small { font-size: 0.75rem; color: var(--lrn-text-muted); font-weight: 600; }
.lrn-lesson-nav-prev strong, .lrn-lesson-nav-next strong { font-size: 0.9rem; font-weight: 800; }

/* ---- Sidebar ---------------------------------------------- */
.lrn-sidebar-widget {
  background: #fff;
  border: 2px solid var(--lrn-border);
  border-radius: var(--lrn-radius);
  padding: 1.35rem;
}

.lrn-sidebar-widget-title {
  font-size: 0.875rem;
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--lrn-primary);
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.lrn-sidebar-lessons {
  list-style: none;
  margin: 0; padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0;
}
.lrn-sidebar-lessons li { border-bottom: 1px solid var(--lrn-border); }
.lrn-sidebar-lessons li:last-child { border-bottom: none; }

.lrn-sidebar-lesson-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.65rem 0;
  gap: 0.5rem;
  text-decoration: none;
  color: var(--lrn-text);
  font-size: 0.875rem;
  font-weight: 700;
  transition: color var(--lrn-transition);
}
.lrn-sidebar-lesson-link:hover { color: var(--lrn-primary); text-decoration: none; }
.lrn-sidebar-lesson-title { flex: 1; line-height: 1.35; }
.lrn-sidebar-lesson-count { font-size: 0.75rem; color: var(--lrn-text-light); white-space: nowrap; }

/* ---- Empty state ------------------------------------------ */
.lrn-empty { text-align: center; padding: 4rem 1rem; color: var(--lrn-text-muted); }
.lrn-empty-icon { font-size: 3.5rem; display: block; margin-bottom: 1rem; }

/* ---- Offline page ----------------------------------------- */
.lrn-offline-wrap { max-width: 480px; margin: 0 auto; padding: 3rem 1rem; text-align: center; }
.lrn-offline-icon { font-size: 4rem; margin-bottom: 1rem; }
.lrn-offline-title { font-size: 1.75rem; font-weight: 900; margin-bottom: 0.75rem; }
.lrn-offline-desc { color: var(--lrn-text-muted); font-weight: 600; margin-bottom: 1.5rem; }
.lrn-offline-actions { display: flex; flex-wrap: wrap; gap: 0.75rem; justify-content: center; margin-bottom: 1.5rem; }
.lrn-offline-hint { font-size: 0.85rem; color: var(--lrn-text-muted); font-weight: 600; }

/* ---- Activity Worlds -------------------------------------- */
.lrn-worlds-section {
  background: var(--lrn-bg);
}

.lrn-section-subtitle {
  text-align: center;
  color: var(--lrn-text-muted);
  font-size: 1.05rem;
  font-weight: 600;
  margin-top: -0.75rem;
  margin-bottom: 2.5rem;
}

.lrn-worlds-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.25rem;
  max-width: 800px;
  margin: 0 auto;
}

@media (max-width: 580px) {
  .lrn-worlds-grid { grid-template-columns: 1fr; max-width: 420px; }
}

.lrn-world-card {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  background: #fff;
  border-radius: var(--lrn-radius);
  padding: 1.75rem 1.5rem;
  box-shadow: var(--lrn-shadow);
  border: 2.5px solid var(--lrn-border);
  text-decoration: none;
  color: var(--lrn-text);
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
  position: relative;
  overflow: hidden;
}

/* Active world: Language Learning */
.lrn-world-card--languages {
  border-color: transparent;
  background: linear-gradient(135deg, #ede9fe 0%, #e0f2fe 100%);
}

.lrn-world-card--languages:hover {
  transform: translateY(-3px) scale(1.015);
  box-shadow: var(--lrn-shadow-lg);
}

.lrn-world-card--languages:focus-visible {
  outline: 3px solid var(--lrn-primary);
  outline-offset: 3px;
}

/* Coming-soon worlds */
.lrn-world-card--soon {
  opacity: 0.65;
  cursor: default;
  border-style: dashed;
}

.lrn-world-card-icon {
  font-size: 2.75rem;
  line-height: 1;
  margin-bottom: 0.75rem;
  filter: drop-shadow(0 2px 4px rgba(0,0,0,.1));
}

.lrn-world-card-title {
  font-size: 1.1rem;
  font-weight: 900;
  margin: 0 0 0.4rem;
  color: var(--lrn-text);
  letter-spacing: -0.01em;
}

.lrn-world-card-desc {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--lrn-text-muted);
  margin: 0 0 1.1rem;
  line-height: 1.5;
  flex: 1;
}

.lrn-world-card-cta {
  font-size: 0.875rem;
  font-weight: 900;
  color: var(--lrn-primary);
  background: rgba(124,58,237,.1);
  padding: 0.4rem 1rem;
  border-radius: 9999px;
  transition: background 0.2s;
  display: inline-block;
}

.lrn-world-card--languages:hover .lrn-world-card-cta {
  background: rgba(124,58,237,.22);
}

.lrn-world-card-badge {
  font-size: 0.72rem;
  font-weight: 900;
  color: #78350f;
  background: #fef3c7;
  border: 1.5px solid #fcd34d;
  padding: 0.25rem 0.7rem;
  border-radius: 9999px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Language world anchor region */
.lrn-language-world {
  scroll-margin-top: 4rem;
}

/* World section heading (inside language-learning) */
.lrn-world-section-header {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  margin-bottom: 1.75rem;
  padding-bottom: 0.875rem;
  border-bottom: 2px solid var(--lrn-border);
}

.lrn-world-section-icon {
  font-size: 1.6rem;
  line-height: 1;
}

.lrn-world-section-title {
  font-size: 1.5rem;
  font-weight: 900;
  color: var(--lrn-text);
  margin: 0;
  letter-spacing: -0.02em;
}

.lrn-world-section-tag {
  margin-left: auto;
  font-size: 0.7rem;
  font-weight: 900;
  color: var(--lrn-primary);
  background: rgba(124,58,237,.1);
  padding: 0.22rem 0.6rem;
  border-radius: 9999px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  flex-shrink: 0;
}

/* Hero hub variant */
.lrn-hero-hub .lrn-hero-logo-wrap {
  text-align: center;
  margin-bottom: 1.5rem;
}

/* ---- Footer ----------------------------------------------- */
.lrn-footer {
  background: linear-gradient(135deg, #1e1b4b 0%, #312e81 100%);
  color: rgba(255,255,255,.7);
  padding: 3.5rem 0 1.5rem;
}

.lrn-footer-grid { display: grid; grid-template-columns: 1fr; gap: 2rem; margin-bottom: 2rem; }
@media (min-width: 640px) { .lrn-footer-grid { grid-template-columns: 2fr 1fr 1fr; } }

.lrn-footer-brand { display: flex; align-items: center; gap: 0.5rem; font-size: 1.15rem; font-weight: 900; color: #fff; margin-bottom: 0.5rem; }
.lrn-footer-tagline { font-size: 0.875rem; font-weight: 600; margin-bottom: 0; }
.lrn-footer-col h4 { font-size: 0.8rem; font-weight: 900; text-transform: uppercase; letter-spacing: 0.06em; color: rgba(255,255,255,.5); margin-bottom: 0.875rem; }

.lrn-footer-links { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 0.5rem; }
.lrn-footer-links a { color: rgba(255,255,255,.65); font-size: 0.875rem; font-weight: 700; text-decoration: none; }
.lrn-footer-links a:hover { color: #fff; }

.lrn-footer-bottom { border-top: 1px solid rgba(255,255,255,.1); padding-top: 1.5rem; font-size: 0.8rem; font-weight: 600; text-align: center; }

/* ============================================================
   PWA Install Banners — 5 styles, all driven by .active class
   ============================================================ */

/* Shared close button */
.lrn-banner-close {
  background: none; border: none; cursor: pointer; line-height: 1;
  color: var(--lrn-text-muted); padding: .25rem; font-size: 1.1rem;
  display: flex; align-items: center; justify-content: center;
  border-radius: .375rem; transition: background .15s, color .15s;
}
.lrn-banner-close:hover { background: #f3f4f6; color: #111; }

/* ── 1. Bottom Bar ─────────────────────────────────────────── */
.lrn-banner--bottom-bar {
  position: fixed; bottom: 0; left: 0; right: 0;
  background: #fff;
  border-top: 2px solid var(--lrn-border);
  box-shadow: 0 -4px 24px rgba(124,58,237,.12);
  z-index: 9000;
  transform: translateY(110%);
  transition: transform .38s cubic-bezier(.34,1.56,.64,1);
  padding: .85rem 1.25rem;
}
.lrn-banner--bottom-bar.active { transform: translateY(0); }

.lrn-bb-inner {
  display: flex; align-items: center; gap: .875rem;
  max-width: 680px; margin: 0 auto;
}
.lrn-bb-icon {
  width: 44px; height: 44px; border-radius: .625rem;
  object-fit: cover; flex-shrink: 0;
  box-shadow: 0 2px 8px rgba(0,0,0,.12);
}
.lrn-bb-text { flex: 1; min-width: 0; }
.lrn-bb-text strong { display: block; font-size: .95rem; font-weight: 800; color: var(--lrn-text); }
.lrn-bb-text span   { font-size: .8rem; color: var(--lrn-text-muted); font-weight: 600; }
.lrn-bb-inner .lrn-banner-close { margin-left: .25rem; }

/* ── 2. Floating Card ──────────────────────────────────────── */
.lrn-banner--floating-card {
  position: fixed; bottom: 1.5rem; right: 1.5rem;
  background: #fff;
  border-radius: 1.25rem;
  box-shadow: 0 12px 40px rgba(0,0,0,.18), 0 2px 8px rgba(124,58,237,.1);
  z-index: 9000;
  padding: 1.5rem 1.25rem 1.25rem;
  width: 290px;
  text-align: center;
  opacity: 0;
  transform: translateY(24px) scale(.94);
  transition: opacity .3s ease, transform .35s cubic-bezier(.34,1.56,.64,1);
  pointer-events: none;
}
.lrn-banner--floating-card.active {
  opacity: 1; transform: translateY(0) scale(1); pointer-events: auto;
}
.lrn-fc-close-row {
  display: flex; justify-content: flex-end; margin-bottom: .5rem;
}
.lrn-fc-icon {
  width: 72px; height: 72px; border-radius: 1rem; object-fit: cover;
  margin: 0 auto .75rem; display: block;
  box-shadow: 0 4px 16px rgba(0,0,0,.15);
}
.lrn-fc-title { font-size: 1rem; font-weight: 900; color: var(--lrn-text); margin-bottom: .25rem; }
.lrn-fc-sub   { font-size: .82rem; color: var(--lrn-text-muted); font-weight: 600; margin-bottom: 1rem; }
.lrn-fc-skip  {
  display: block; margin-top: .6rem;
  font-size: .8rem; color: var(--lrn-text-muted); font-weight: 600;
  background: none; border: none; cursor: pointer; text-decoration: underline;
}

/* ── 3. Top Strip ──────────────────────────────────────────── */
.lrn-banner--top-strip {
  position: fixed; top: 0; left: 0; right: 0;
  background: linear-gradient(90deg, var(--lrn-primary) 0%, var(--lrn-secondary) 100%);
  color: #fff;
  z-index: 9001; /* above sticky header */
  display: flex; align-items: center; justify-content: center;
  gap: .75rem; padding: .55rem 1rem;
  font-size: .88rem; font-weight: 700;
  transform: translateY(-110%);
  transition: transform .35s cubic-bezier(.34,1.56,.64,1);
}
.lrn-banner--top-strip.active { transform: translateY(0); }
.lrn-banner--top-strip .lrn-banner-close { color: rgba(255,255,255,.8); }
.lrn-banner--top-strip .lrn-banner-close:hover { background: rgba(255,255,255,.15); color: #fff; }

/* ── 4. Modal ──────────────────────────────────────────────── */
.lrn-banner--modal {
  position: fixed; inset: 0;
  background: rgba(30,27,75,.55);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  display: flex; align-items: center; justify-content: center;
  z-index: 9002; padding: 1rem;
  opacity: 0; pointer-events: none;
  transition: opacity .25s ease;
}
.lrn-banner--modal.active { opacity: 1; pointer-events: auto; }

.lrn-bm-card {
  background: #fff; border-radius: 1.75rem;
  padding: 2.5rem 2rem 2rem;
  max-width: 380px; width: 100%;
  text-align: center; position: relative;
  box-shadow: 0 24px 64px rgba(0,0,0,.2);
  transform: scale(.88) translateY(24px);
  transition: transform .35s cubic-bezier(.34,1.56,.64,1);
}
.lrn-banner--modal.active .lrn-bm-card { transform: scale(1) translateY(0); }

.lrn-bm-close-row {
  position: absolute; top: 1rem; right: 1rem;
}
.lrn-bm-icon {
  width: 96px; height: 96px; border-radius: 1.25rem; object-fit: cover;
  margin: 0 auto 1.25rem; display: block;
  box-shadow: 0 6px 24px rgba(0,0,0,.15);
}
.lrn-bm-title { font-size: 1.35rem; font-weight: 900; color: var(--lrn-text); margin-bottom: .5rem; }
.lrn-bm-body  { font-size: .9rem; color: var(--lrn-text-muted); font-weight: 600; margin-bottom: 1.5rem; }
.lrn-bm-skip  {
  display: block; margin-top: .875rem;
  font-size: .82rem; color: var(--lrn-text-muted); font-weight: 600;
  background: none; border: none; cursor: pointer; text-decoration: underline;
}

/* ── 5. Side Card ──────────────────────────────────────────── */
.lrn-banner--side-card {
  position: fixed; bottom: 1.5rem; right: 1.5rem;
  background: #fff;
  border-radius: 1rem;
  box-shadow: 0 8px 32px rgba(0,0,0,.16), 0 2px 8px rgba(124,58,237,.08);
  border-left: 4px solid var(--lrn-primary);
  z-index: 9000;
  padding: 1rem 1rem 1rem .875rem;
  width: 270px;
  transform: translateX(110%);
  transition: transform .38s cubic-bezier(.34,1.56,.64,1);
}
.lrn-banner--side-card.active { transform: translateX(0); }

.lrn-sc-header {
  display: flex; align-items: center; gap: .6rem; margin-bottom: .5rem;
}
.lrn-sc-icon {
  width: 36px; height: 36px; border-radius: .5rem; object-fit: cover; flex-shrink: 0;
}
.lrn-sc-title { font-weight: 800; font-size: .92rem; color: var(--lrn-text); flex: 1; }
.lrn-sc-body  { font-size: .8rem; color: var(--lrn-text-muted); font-weight: 600; margin-bottom: .875rem; }
.lrn-sc-actions { display: flex; gap: .5rem; align-items: center; }

/* Mobile overrides */
@media (max-width: 480px) {
  .lrn-banner--floating-card,
  .lrn-banner--side-card {
    right: .75rem; left: .75rem; width: auto; max-width: none;
  }
}

/* ── Navbar — active child profile pill ─────────────────── */

.lrn-nav-child-pill {
  display: flex;
  align-items: center;
  gap: .35rem;
  background: #ede9fe;
  border-radius: 999px;
  padding: .25rem .7rem .25rem .35rem;
  font-size: .88rem;
  font-weight: 700;
  color: #5b21b6;
  text-decoration: none;
  white-space: nowrap;
  transition: background .15s;
}

.lrn-nav-child-pill:hover { background: #ddd6fe; }

.lrn-nav-child-avatar {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: .95rem;
  flex-shrink: 0;
}

/* ---- Language pair badge (navbar) ------------------------- */

.lrn-nav-pair-badge .lrn-lang-icon,
.lrn-nav-pair-badge .lrn-lang-icon img {
  width: 1.1rem;
  height: 1.1rem;
  display: inline-block;
  vertical-align: middle;
}

/* ---- Language pair picker --------------------------------- */

.lrn-pair-picker-overlay {
  position: fixed;
  inset: 0;
  z-index: 9900;
  background: rgba(30, 27, 75, .72);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  backdrop-filter: blur(4px);
  animation: lrnPairFadeIn .25s ease;
}
.lrn-pair-picker-overlay[hidden] { display: none; }
.lrn-pair-picker-overlay--done { opacity: 0; transition: opacity .35s ease; pointer-events: none; }

@keyframes lrnPairFadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

.lrn-pair-picker-box {
  background: #fff;
  border-radius: var(--lrn-radius-lg);
  box-shadow: var(--lrn-shadow-lg);
  padding: 2rem 1.75rem 2.25rem;
  width: 100%;
  max-width: 480px;
  max-height: 90vh;
  overflow-y: auto;
  animation: lrnPairSlideUp .3s ease;
}

@keyframes lrnPairSlideUp {
  from { transform: translateY(24px); opacity: 0; }
  to   { transform: translateY(0);    opacity: 1; }
}

.lrn-pair-picker-header {
  text-align: center;
  margin-bottom: 1.5rem;
}
.lrn-pair-picker-emoji {
  font-size: 2.5rem;
  display: block;
  margin-bottom: .5rem;
}
.lrn-pair-picker-title {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--lrn-text);
  margin: 0 0 .35rem;
}
.lrn-pair-picker-sub {
  font-size: .95rem;
  color: var(--lrn-text-muted);
  margin: 0;
}

.lrn-pair-picker-step { margin-bottom: 1.25rem; }
.lrn-pair-picker-step--hidden { display: none; }

.lrn-pair-picker-step-label {
  font-weight: 700;
  font-size: 1rem;
  color: var(--lrn-text);
  margin: 0 0 .65rem;
}

.lrn-pair-picker-lang-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
  gap: .6rem;
}

.lrn-pair-lang-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: .3rem;
  padding: .75rem .5rem;
  background: var(--lrn-bg-alt);
  border: 2px solid transparent;
  border-radius: var(--lrn-radius-sm);
  cursor: pointer;
  font-family: var(--lrn-font);
  font-size: .88rem;
  font-weight: 600;
  color: var(--lrn-text);
  transition: border-color var(--lrn-transition), background var(--lrn-transition), transform var(--lrn-transition);
  line-height: 1.2;
  text-align: center;
}
.lrn-pair-lang-btn:hover,
.lrn-pair-lang-btn:focus-visible {
  border-color: var(--lrn-primary);
  background: #f5f3ff;
  outline: none;
}
.lrn-pair-lang-btn--selected {
  border-color: var(--lrn-primary);
  background: #ede9fe;
  color: var(--lrn-primary-dark);
  transform: scale(1.04);
}
.lrn-pair-lang-flag { font-size: 1.75rem; line-height: 1; display: block; }
.lrn-pair-lang-flag .lrn-lang-icon,
.lrn-pair-lang-flag .lrn-lang-icon img {
  width: 2rem;
  height: 2rem;
  display: block;
}
.lrn-pair-lang-name { display: block; }

.lrn-pair-picker-actions { text-align: center; margin-top: .5rem; }
.lrn-pair-picker-summary {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--lrn-text);
  margin: 0 0 1rem;
}
.lrn-pair-picker-save {
  width: 100%;
  font-size: 1.05rem;
  padding: .85rem 1.5rem;
}

.lrn-pair-picker-footer-note {
  margin: .75rem 0 0;
  font-size: .85rem;
  color: var(--lrn-danger);
  text-align: center;
  min-height: 1.2em;
}

/* Pair indicator in nav — shown after pair is saved */
.lrn-nav-pair-badge {
  display: inline-flex;
  align-items: center;
  gap: .3rem;
  font-size: .8rem;
  font-weight: 700;
  color: var(--lrn-text-muted);
  background: var(--lrn-bg-alt);
  border-radius: 2rem;
  padding: .25rem .65rem;
  cursor: pointer;
  text-decoration: none;
  transition: background var(--lrn-transition);
}
.lrn-nav-pair-badge:hover { background: var(--lrn-border); }