/* ================= ALAPAKADALA STUDIO - ROOT LESSONS HUB ================= */
:root {
  --primary: #4F46E5;
  --primary-light: #818CF8;
  --primary-dark: #3730A3;
  --accent-pink: #EC4899;
  --accent-amber: #F59E0B;
  --accent-teal: #10B981;
  --accent-cyan: #06B6D4;
  
  --bg-gradient: linear-gradient(145deg, #F8FAFC 0%, #EEF2FF 40%, #F5F3FF 70%, #F8FAFC 100%);
  --card-bg: #FFFFFF;
  --text-dark: #0F172A;
  --text-body: #334155;
  --text-muted: #64748B;
  
  --radius-xs: 6px;
  --radius-sm: 10px;
  --radius-md: 18px;
  --radius-lg: 28px;
  --radius-pill: 9999px;
  
  --shadow-xs: 0 1px 3px rgba(15, 23, 42, 0.05);
  --shadow-sm: 0 4px 12px rgba(79, 70, 229, 0.06);
  --shadow-md: 0 10px 25px rgba(79, 70, 229, 0.09);
  --shadow-lg: 0 20px 40px rgba(79, 70, 229, 0.14);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
}

body {
  font-family: 'Fredoka', 'Nunito', system-ui, -apple-system, sans-serif;
  background: var(--bg-gradient);
  color: var(--text-dark);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* ================= HEADER ================= */
.hub-header {
  position: sticky;
  top: 0;
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(12px);
  padding: 14px 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  box-shadow: 0 2px 14px rgba(79, 70, 229, 0.06);
  border-bottom: 1.5px solid #E2E8F0;
  z-index: 100;
  flex-wrap: wrap;
  gap: 14px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-logo {
  font-size: 1.8rem;
  background: #EEF2FF;
  padding: 6px 12px;
  border-radius: var(--radius-md);
  border: 1px solid #C7D2FE;
  box-shadow: 0 2px 8px rgba(79, 70, 229, 0.08);
  line-height: 1;
}

.brand-text h1 {
  font-size: 1.35rem;
  font-weight: 700;
  color: #1E1B4B;
  line-height: 1.2;
  letter-spacing: -0.3px;
}

.studio-badge {
  display: inline-block;
  background: linear-gradient(90deg, #4338CA, #6366F1);
  color: #FFFFFF;
  font-size: 0.7rem;
  font-weight: 800;
  padding: 2px 9px;
  border-radius: var(--radius-pill);
  letter-spacing: 0.4px;
  text-transform: uppercase;
  margin-top: 2px;
}

.hub-header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.hub-nav-btn {
  background: #EEF2FF;
  color: var(--primary);
  border: 1.5px solid #C7D2FE;
  padding: 7px 16px;
  border-radius: var(--radius-pill);
  font-weight: 800;
  font-size: 0.85rem;
  font-family: inherit;
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.hub-nav-btn:hover {
  background: #E0E7FF;
  border-color: var(--primary);
  transform: translateX(-3px);
}

.hub-grade-chip {
  background: #FEF3C7;
  color: #92400E;
  border: 1px solid #FDE68A;
  padding: 6px 14px;
  border-radius: var(--radius-pill);
  font-weight: 800;
  font-size: 0.85rem;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.hub-nav-btn.hidden,
.hub-view-panel.hidden {
  display: none !important;
}

/* ================= MAIN CONTAINER ================= */
.hub-main {
  flex: 1;
  max-width: 1040px;
  width: 100%;
  margin: 0 auto;
  padding: 36px 20px 48px;
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.hub-view-panel {
  display: flex;
  flex-direction: column;
  gap: 32px;
  animation: fadeInPanel 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes fadeInPanel {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ================= HERO SECTION ================= */
.hub-hero {
  text-align: center;
  background: #FFFFFF;
  border-radius: var(--radius-lg);
  padding: 40px 28px 32px;
  box-shadow: var(--shadow-sm);
  border: 1.5px solid #E2E8F0;
  position: relative;
  overflow: hidden;
}

.hub-hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 5px;
  background: linear-gradient(90deg, #4F46E5, #8B5CF6, #EC4899, #F59E0B, #10B981);
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: #EEF2FF;
  color: var(--primary);
  font-size: 0.85rem;
  font-weight: 800;
  padding: 6px 16px;
  border-radius: var(--radius-pill);
  margin-bottom: 14px;
  border: 1px solid #C7D2FE;
}

.hub-hero h2 {
  font-size: 2.15rem;
  font-weight: 700;
  color: #0F172A;
  margin-bottom: 12px;
  line-height: 1.25;
  letter-spacing: -0.5px;
}

.hub-hero p {
  font-family: 'Nunito', sans-serif;
  font-size: 1.1rem;
  color: var(--text-body);
  max-width: 680px;
  margin: 0 auto 22px;
  line-height: 1.6;
}

.hero-highlights-row {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 10px;
}

.highlight-pill {
  background: #F8FAFC;
  border: 1px solid #E2E8F0;
  padding: 6px 14px;
  border-radius: var(--radius-pill);
  font-size: 0.82rem;
  font-weight: 700;
  color: #475569;
  display: inline-flex;
  align-items: center;
  gap: 5px;
  transition: all 0.2s ease;
}

.highlight-pill:hover {
  background: #EEF2FF;
  border-color: #C7D2FE;
  color: var(--primary);
}

/* ================= GRADE LISTVIEW ================= */
.grade-listview-wrapper {
  background: #FFFFFF;
  border-radius: var(--radius-lg);
  border: 1.5px solid #E2E8F0;
  box-shadow: var(--shadow-sm);
  padding: 28px;
}

.grade-listview-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
  padding-bottom: 14px;
  border-bottom: 1px solid #F1F5F9;
}

.grade-listview-header h3 {
  font-size: 1.25rem;
  font-weight: 700;
  color: #1E293B;
}

.grade-count-badge {
  background: #EEF2FF;
  color: var(--primary);
  font-size: 0.8rem;
  font-weight: 800;
  padding: 4px 12px;
  border-radius: var(--radius-pill);
  border: 1px solid #C7D2FE;
}

.grade-listview {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.grade-list-item {
  background: #FAFAFC;
  border: 2px solid #E2E8F0;
  border-radius: var(--radius-md);
  padding: 22px 26px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  cursor: pointer;
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

.grade-list-item:hover,
.grade-list-item:focus {
  background: #FFFFFF;
  border-color: var(--primary);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
  outline: none;
}

.grade-item-left {
  display: flex;
  align-items: center;
  gap: 22px;
  flex: 1;
}

.grade-item-avatar {
  width: 76px;
  height: 76px;
  background: linear-gradient(135deg, #EEF2FF 0%, #E0E7FF 100%);
  border: 2px solid #C7D2FE;
  border-radius: var(--radius-md);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  box-shadow: 0 4px 12px rgba(79, 70, 229, 0.08);
  transition: transform 0.2s ease;
}

.grade-list-item:hover .grade-item-avatar {
  transform: scale(1.05) rotate(-2deg);
}

.grade-avatar-icon {
  font-size: 2.2rem;
  line-height: 1;
}

.grade-number-tag {
  font-size: 0.72rem;
  font-weight: 900;
  color: #4338CA;
  margin-top: 3px;
  letter-spacing: 0.5px;
}

.grade-item-details {
  flex: 1;
}

.grade-item-title-row {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 6px;
}

.grade-item-title-row h4 {
  font-size: 1.35rem;
  font-weight: 700;
  color: #0F172A;
}

.grade-status-pill {
  background: #D1FAE5;
  color: #065F46;
  border: 1px solid #A7F3D0;
  padding: 3px 10px;
  border-radius: var(--radius-pill);
  font-size: 0.76rem;
  font-weight: 800;
}

.grade-item-desc {
  font-family: 'Nunito', sans-serif;
  font-size: 0.96rem;
  color: var(--text-body);
  margin-bottom: 12px;
  line-height: 1.5;
}

.grade-item-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.meta-tag {
  background: #F1F5F9;
  border: 1px solid #E2E8F0;
  color: #475569;
  font-size: 0.78rem;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: var(--radius-pill);
}

.grade-item-right {
  flex-shrink: 0;
}

.grade-enter-btn {
  background: linear-gradient(135deg, #4F46E5, #6366F1);
  color: #FFFFFF;
  border: none;
  font-family: inherit;
  font-size: 1.02rem;
  font-weight: 800;
  padding: 13px 24px;
  border-radius: var(--radius-pill);
  display: flex;
  align-items: center;
  gap: 10px;
  box-shadow: 0 4px 14px rgba(79, 70, 229, 0.28);
  cursor: pointer;
  transition: all 0.2s ease;
  pointer-events: none;
}

.grade-list-item:hover .grade-enter-btn {
  background: linear-gradient(135deg, #4338CA, #4F46E5);
  transform: translateX(4px);
  box-shadow: 0 8px 22px rgba(79, 70, 229, 0.38);
}

.arrow-icon {
  font-size: 1.15rem;
  transition: transform 0.2s ease;
}

.grade-list-item:hover .arrow-icon {
  transform: translateX(3px);
}

/* ================= PARENT ASSURANCE STRIP ================= */
.parent-assurance-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
}

.assurance-card {
  background: #FFFFFF;
  border: 1.5px solid #E2E8F0;
  border-radius: var(--radius-md);
  padding: 22px;
  display: flex;
  align-items: flex-start;
  gap: 16px;
  box-shadow: var(--shadow-xs);
}

.assurance-icon {
  font-size: 2rem;
  line-height: 1;
  background: #F8FAFC;
  padding: 10px;
  border-radius: var(--radius-md);
  border: 1px solid #E2E8F0;
  flex-shrink: 0;
}

.assurance-text h5 {
  font-size: 1.05rem;
  font-weight: 700;
  color: #1E293B;
  margin-bottom: 4px;
}

.assurance-text p {
  font-family: 'Nunito', sans-serif;
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.45;
}

/* ================= LESSONS BREADCRUMB NAVIGATION ================= */
.lessons-nav-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 12px 20px;
  background: #FFFFFF;
  border: 1.5px solid #E2E8F0;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-xs);
  flex-wrap: wrap;
  gap: 12px;
}

.lessons-back-btn {
  background: #EEF2FF;
  color: var(--primary);
  border: 1.5px solid #C7D2FE;
  font-family: inherit;
  font-size: 0.9rem;
  font-weight: 800;
  padding: 8px 18px;
  border-radius: var(--radius-pill);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: all 0.2s ease;
}

.lessons-back-btn:hover {
  background: #E0E7FF;
  border-color: var(--primary);
  transform: translateX(-3px);
}

.current-grade-badge {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.9rem;
  color: #64748B;
}

.current-grade-badge strong {
  color: #312E81;
  background: #F1F5F9;
  padding: 4px 12px;
  border-radius: var(--radius-pill);
  border: 1px solid #E2E8F0;
  font-weight: 800;
}

/* ================= LESSONS CARDS GRID ================= */
.lessons-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(360px, 1fr));
  gap: 28px;
}

.lesson-card {
  background: #FFFFFF;
  border-radius: var(--radius-lg);
  border: 2px solid #E2E8F0;
  box-shadow: var(--shadow-sm);
  padding: 28px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  text-decoration: none;
  color: inherit;
  position: relative;
  overflow: hidden;
}

.lesson-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.lesson-card.shapes:hover {
  border-color: var(--primary-light);
}

.lesson-card.symmetry:hover {
  border-color: #F472B6;
}

.lesson-card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}

.lesson-number-badge {
  font-size: 0.78rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  padding: 4px 12px;
  border-radius: var(--radius-pill);
}

.lesson-card.shapes .lesson-number-badge {
  background: #EEF2FF;
  color: #4338CA;
  border: 1px solid #C7D2FE;
}

.lesson-card.symmetry .lesson-number-badge {
  background: #FDF2F8;
  color: #BE185D;
  border: 1px solid #FBCFE8;
}

.lesson-badge-pill {
  font-size: 0.78rem;
  font-weight: 800;
  background: #F1F5F9;
  color: #475569;
  padding: 4px 10px;
  border-radius: var(--radius-pill);
  border: 1px solid #E2E8F0;
}

/* Playful Floating Mascot Banner */
.lesson-visual-banner {
  height: 120px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3.2rem;
  margin-bottom: 20px;
  gap: 16px;
  position: relative;
  border: 1.5px solid transparent;
  transition: transform 0.25s ease;
}

.lesson-card:hover .lesson-visual-banner {
  transform: scale(1.02);
}

.shapes-banner {
  background: linear-gradient(135deg, #EEF2FF 0%, #E0E7FF 100%);
  border-color: #C7D2FE;
}

.symmetry-banner {
  background: linear-gradient(135deg, #FDF2F8 0%, #FCE7F3 100%);
  border-color: #FBCFE8;
}

.floating-icon {
  display: inline-block;
  animation: gentleFloat 3s ease-in-out infinite alternate;
}

.icon-1 { animation-delay: 0s; }
.icon-2 { animation-delay: 0.5s; }
.icon-3 { animation-delay: 1.0s; }
.icon-4 { animation-delay: 1.5s; }

@keyframes gentleFloat {
  0% { transform: translateY(0) rotate(0deg); }
  50% { transform: translateY(-6px) rotate(2deg); }
  100% { transform: translateY(3px) rotate(-2deg); }
}

.lesson-title-block {
  margin-bottom: 12px;
}

.lesson-title-block h3 {
  font-size: 1.45rem;
  font-weight: 700;
  color: #0F172A;
  margin-bottom: 4px;
}

.lesson-subtitle {
  font-family: 'Nunito', sans-serif;
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--primary);
}

.lesson-card.symmetry .lesson-subtitle {
  color: #BE185D;
}

.lesson-desc {
  font-family: 'Nunito', sans-serif;
  font-size: 0.96rem;
  color: var(--text-body);
  line-height: 1.55;
  margin-bottom: 18px;
}

.lesson-features-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 24px;
}

.feat-pill {
  background: #F8FAFC;
  border: 1px solid #E2E8F0;
  color: #334155;
  font-size: 0.8rem;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: var(--radius-pill);
}

.lesson-card-footer {
  margin-top: auto;
}

.lesson-cta-btn {
  background: linear-gradient(135deg, #4F46E5, #6366F1);
  color: #FFFFFF;
  font-size: 1.05rem;
  font-weight: 800;
  padding: 13px 20px;
  border-radius: var(--radius-pill);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  box-shadow: 0 4px 14px rgba(79, 70, 229, 0.28);
  transition: all 0.2s ease;
}

.lesson-card.symmetry .lesson-cta-btn {
  background: linear-gradient(135deg, #BE185D, #EC4899);
  box-shadow: 0 4px 14px rgba(236, 72, 153, 0.28);
}

.lesson-card:hover .lesson-cta-btn {
  transform: translateY(-2px);
  box-shadow: 0 8px 22px rgba(79, 70, 229, 0.38);
}

.lesson-card.symmetry:hover .lesson-cta-btn {
  box-shadow: 0 8px 22px rgba(236, 72, 153, 0.38);
}

.cta-arrow {
  font-size: 1.15rem;
  transition: transform 0.2s ease;
}

.lesson-card:hover .cta-arrow {
  transform: translateX(4px);
}

/* ================= BENEFITS STRIP ================= */
.benefits-card {
  background: #FFFFFF;
  border: 1.5px solid #E2E8F0;
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow-sm);
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
}

.benefit-item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
}

.benefit-icon {
  font-size: 1.8rem;
  line-height: 1;
  background: #EEF2FF;
  padding: 8px 10px;
  border-radius: var(--radius-md);
  border: 1px solid #C7D2FE;
  flex-shrink: 0;
}

.benefit-info h4 {
  font-size: 1.05rem;
  font-weight: 700;
  color: #1E293B;
  margin-bottom: 4px;
}

.benefit-info p {
  font-family: 'Nunito', sans-serif;
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.45;
}

/* ================= FOOTER ================= */
.hub-footer {
  background: #FFFFFF;
  border-top: 1.5px solid #E2E8F0;
  padding: 24px 20px;
  text-align: center;
  margin-top: auto;
}

.footer-content {
  max-width: 800px;
  margin: 0 auto;
}

.hub-footer p {
  font-family: 'Nunito', sans-serif;
  font-size: 0.92rem;
  color: var(--text-muted);
  margin-bottom: 4px;
}

.hub-footer strong {
  color: #1E293B;
}

.hub-footer .copyright {
  font-size: 0.82rem;
  color: #94A3B8;
}

/* ================= RESPONSIVE DESIGN ================= */
@media (max-width: 768px) {
  .hub-header {
    padding: 12px 18px;
  }

  .brand-text h1 {
    font-size: 1.15rem;
  }

  .hub-hero {
    padding: 30px 18px 24px;
  }

  .hub-hero h2 {
    font-size: 1.65rem;
  }

  .hub-hero p {
    font-size: 0.96rem;
  }

  .grade-list-item {
    flex-direction: column;
    align-items: flex-start;
    padding: 20px 18px;
    gap: 16px;
  }

  .grade-item-left {
    flex-direction: column;
    align-items: flex-start;
    gap: 14px;
    width: 100%;
  }

  .grade-item-right {
    width: 100%;
  }

  .grade-enter-btn {
    width: 100%;
    justify-content: center;
  }

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

  .lesson-card {
    padding: 22px 18px;
  }
}