/* ============================================
   FREEDOM ACADEMY KIDS — Main Stylesheet
   Designed for children ages 5-10
   ============================================ */

/* === CUSTOM PROPERTIES === */
:root {
  /* Kids-first color palette — bright, warm, accessible */
  --color-sun: #FFD93D;
  --color-orange: #FF6B35;
  --color-teal: #4ECDC4;
  --color-green: #6BCB77;
  --color-blue: #4D96FF;
  --color-purple: #A29BFE;
  --color-pink: #FD79A8;
  --color-red: #FF6B6B;

  /* Surfaces */
  --color-bg: #FFFDF5;
  --color-surface: #FFFFFF;
  --color-surface-2: #FFF8E8;

  /* Text */
  --color-text: #2D2D2D;
  --color-text-muted: #666666;
  --color-text-light: #999999;

  /* Semantic */
  --color-primary: #FF6B35;
  --color-primary-hover: #E55A24;
  --color-secondary: #4ECDC4;
  --color-accent: #FFD93D;

  /* Path/map color */
  --color-path: #FFD93D;

  /* Fonts */
  --font-display: 'Fredoka One', 'Comic Sans MS', cursive;
  --font-body: 'Nunito', 'Arial Rounded MT Bold', sans-serif;

  /* Type scale — BIGGER for kids */
  --text-xs: clamp(0.875rem, 0.8rem + 0.3vw, 1rem);
  --text-sm: clamp(1rem, 0.9rem + 0.4vw, 1.125rem);
  --text-base: clamp(1.125rem, 1rem + 0.5vw, 1.375rem);
  --text-lg: clamp(1.375rem, 1.2rem + 0.7vw, 1.75rem);
  --text-xl: clamp(1.75rem, 1.4rem + 1.2vw, 2.5rem);
  --text-2xl: clamp(2.25rem, 1.5rem + 2.5vw, 3.5rem);
  --text-hero: clamp(2.75rem, 1rem + 5vw, 5rem);

  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;

  /* Border radius — very rounded for kids */
  --radius-sm: 0.5rem;
  --radius-md: 0.875rem;
  --radius-lg: 1.25rem;
  --radius-xl: 2rem;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.08);
  --shadow-md: 0 6px 20px rgba(0,0,0,0.12);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.16);
  --shadow-colored: 0 8px 24px rgba(255, 107, 53, 0.3);

  /* Transitions */
  --transition: 200ms cubic-bezier(0.16, 1, 0.3, 1);

  /* Content widths */
  --content-default: 1100px;
  --content-narrow: 760px;
}

/* === BASE RESET === */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: none;
  text-size-adjust: none;
}

body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-text);
  background-color: var(--color-bg);
  line-height: 1.65;
  overflow-x: hidden;
}

img, svg { display: block; max-width: 100%; }
a { text-decoration: none; color: inherit; }
button { cursor: pointer; background: none; border: none; font: inherit; }
ul, ol { list-style: none; }

:focus-visible {
  outline: 3px solid var(--color-primary);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

/* === TYPOGRAPHY === */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  line-height: 1.2;
  text-wrap: balance;
}

p { max-width: 60ch; text-wrap: pretty; }

/* === BUTTONS === */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-full);
  font-family: var(--font-body);
  font-weight: 800;
  font-size: var(--text-sm);
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition);
  white-space: nowrap;
}

.btn:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); }
.btn:active { transform: translateY(0); }

.btn-primary {
  background: var(--color-primary);
  color: white;
  box-shadow: 0 4px 0 #C04B20;
}
.btn-primary:hover { background: var(--color-primary-hover); }

.btn-secondary {
  background: var(--color-teal);
  color: white;
  box-shadow: 0 4px 0 #2fa89f;
}

.btn-big {
  padding: var(--space-4) var(--space-10);
  font-size: var(--text-lg);
}

.btn-outline {
  background: transparent;
  border: 3px solid currentColor;
  color: var(--color-primary);
}

/* === SECTION TAG === */
.section-tag {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  background: var(--color-accent);
  color: var(--color-text);
  font-weight: 800;
  font-size: var(--text-xs);
  padding: var(--space-1) var(--space-4);
  border-radius: var(--radius-full);
  margin-bottom: var(--space-4);
  letter-spacing: 0.03em;
}

.section-header {
  text-align: center;
  margin-bottom: var(--space-12);
}

.section-title {
  font-size: var(--text-2xl);
  color: var(--color-text);
  margin-bottom: var(--space-4);
}

.section-desc {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  max-width: 50ch;
  margin: 0 auto;
}

/* === HEADER === */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 253, 245, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 3px solid var(--color-accent);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--content-default);
  margin: 0 auto;
  padding: var(--space-3) var(--space-6);
  gap: var(--space-6);
}

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

.logo-text { display: flex; flex-direction: column; }
.logo-main {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  color: var(--color-primary);
  line-height: 1;
}
.logo-sub {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  font-weight: 700;
}

.header-nav {
  display: flex;
  align-items: center;
  gap: var(--space-6);
}

.header-nav a {
  font-weight: 700;
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  transition: color var(--transition);
  border-radius: var(--radius-full);
  padding: var(--space-1) var(--space-3);
}

.header-nav a:hover { color: var(--color-primary); }

/* === HERO === */
.hero {
  position: relative;
  min-height: 88vh;
  display: flex;
  align-items: center;
  padding: var(--space-16) var(--space-6);
  overflow: hidden;
  background: linear-gradient(135deg, #FFF8E8 0%, #FFF0F5 50%, #F0F9FF 100%);
}

.hero-bg-shapes { position: absolute; inset: 0; pointer-events: none; z-index: 0; }

.shape {
  position: absolute;
  border-radius: var(--radius-full);
  opacity: 0.5;
  animation: float 6s ease-in-out infinite;
}

.shape-1 { width: 300px; height: 300px; background: var(--color-sun); top: -100px; right: -80px; animation-delay: 0s; }
.shape-2 { width: 200px; height: 200px; background: var(--color-teal); bottom: -50px; left: -60px; animation-delay: 1s; }
.shape-3 { width: 120px; height: 120px; background: var(--color-pink); top: 30%; left: 15%; animation-delay: 2s; }
.shape-4 { width: 80px; height: 80px; background: var(--color-green); bottom: 20%; right: 20%; animation-delay: 0.5s; }
.shape-5 { width: 150px; height: 150px; background: var(--color-blue); top: 10%; left: 40%; animation-delay: 1.5s; opacity: 0.3; }

@keyframes float {
  0%, 100% { transform: translateY(0) rotate(0deg); }
  33% { transform: translateY(-20px) rotate(5deg); }
  66% { transform: translateY(10px) rotate(-3deg); }
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 620px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  background: white;
  border: 2px solid var(--color-accent);
  color: var(--color-text);
  font-weight: 800;
  font-size: var(--text-sm);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-full);
  margin-bottom: var(--space-6);
  box-shadow: var(--shadow-sm);
}

.hero-title {
  font-size: var(--text-hero);
  line-height: 1.1;
  color: var(--color-text);
  margin-bottom: var(--space-6);
}

.highlight-yellow {
  color: var(--color-orange);
  position: relative;
  display: inline-block;
}

.highlight-yellow::after {
  content: '';
  position: absolute;
  bottom: 2px;
  left: 0;
  right: 0;
  height: 8px;
  background: var(--color-accent);
  border-radius: var(--radius-full);
  z-index: -1;
  opacity: 0.7;
}

.highlight-blue { color: var(--color-blue); }

.hero-desc {
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  margin-bottom: var(--space-8);
  max-width: 50ch;
}

.hero-cta {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--space-4);
}

.hero-stars {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--text-sm);
}

.hero-stars-text { color: var(--color-text-muted); font-weight: 700; }

/* HERO CHARACTERS */
.hero-characters {
  position: absolute;
  right: 5%;
  bottom: 10%;
  z-index: 2;
  display: flex;
  align-items: flex-end;
  gap: var(--space-8);
}

.character {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
}

.char-body {
  font-size: 5rem;
  animation: bounce 2s ease-in-out infinite;
  filter: drop-shadow(0 8px 12px rgba(0,0,0,0.15));
}

.char-1 .char-body { animation-delay: 0s; }
.char-2 .char-body { animation-delay: 0.4s; font-size: 6rem; }
.char-3 .char-body { animation-delay: 0.8s; }

@keyframes bounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-12px); }
}

.char-bubble {
  background: white;
  border: 2px solid var(--color-primary);
  color: var(--color-primary);
  font-weight: 800;
  font-size: var(--text-xs);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-lg);
  white-space: nowrap;
  position: relative;
  box-shadow: var(--shadow-sm);
}

.char-bubble::after {
  content: '';
  position: absolute;
  bottom: -8px;
  left: 50%;
  transform: translateX(-50%);
  border: 4px solid transparent;
  border-top-color: white;
}

/* === STATS BAR === */
.stats-bar {
  background: var(--color-primary);
  padding: var(--space-5) var(--space-6);
}

.stats-inner {
  max-width: var(--content-default);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-8);
  flex-wrap: wrap;
}

.stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-1);
}

.stat-num {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  color: white;
  line-height: 1;
}

.stat-label {
  font-size: var(--text-xs);
  color: rgba(255,255,255,0.8);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.stat-divider {
  width: 1px;
  height: 40px;
  background: rgba(255,255,255,0.3);
}

/* === LESSONS SECTION === */
.lessons-section {
  padding: clamp(var(--space-16), 8vw, var(--space-24)) var(--space-6);
  background: var(--color-bg);
  max-width: 100%;
}

.lessons-map {
  position: relative;
  max-width: var(--content-default);
  margin: 0 auto;
}

.map-path {
  position: absolute;
  top: 50%;
  left: 0;
  right: 0;
  width: 100%;
  height: 120px;
  transform: translateY(-50%);
  pointer-events: none;
  z-index: 0;
}

.lessons-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: var(--space-4);
  position: relative;
  z-index: 1;
}

.lesson-card {
  background: white;
  border-radius: var(--radius-xl);
  padding: var(--space-6) var(--space-4);
  text-align: center;
  text-decoration: none;
  color: var(--color-text);
  border: 3px solid transparent;
  box-shadow: var(--shadow-md);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-3);
  cursor: pointer;
  position: relative;
  overflow: hidden;
}

.lesson-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 6px;
  background: var(--lesson-color, var(--color-primary));
}

.lesson-1 { --lesson-color: #FF6B35; }
.lesson-2 { --lesson-color: #4ECDC4; }
.lesson-3 { --lesson-color: #FFD93D; }
.lesson-4 { --lesson-color: #6BCB77; }
.lesson-5 { --lesson-color: #A29BFE; }

.lesson-card:hover {
  transform: translateY(-8px) scale(1.02);
  box-shadow: var(--shadow-lg);
  border-color: var(--lesson-color, var(--color-primary));
}

.lesson-number {
  width: 36px;
  height: 36px;
  background: var(--lesson-color, var(--color-primary));
  color: white;
  border-radius: var(--radius-full);
  font-family: var(--font-display);
  font-size: var(--text-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 900;
}

.lesson-icon { font-size: 3rem; line-height: 1; }

.lesson-title {
  font-family: var(--font-display);
  font-size: var(--text-sm);
  line-height: 1.3;
  color: var(--color-text);
}

.lesson-time {
  font-size: var(--text-xs);
  color: var(--color-text-light);
  font-weight: 700;
}

.lesson-unlock {
  font-size: var(--text-xs);
  font-weight: 800;
  color: var(--lesson-color, var(--color-primary));
  background: color-mix(in srgb, var(--lesson-color, var(--color-primary)) 12%, transparent);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
}

/* Stars badge when completed */
.lesson-card.completed .lesson-unlock::before { content: '⭐ '; }

/* === HOW SECTION === */
.how-section {
  padding: clamp(var(--space-16), 8vw, var(--space-24)) var(--space-6);
  background: linear-gradient(135deg, #F0F9FF, #FFF0F5);
}

.how-grid {
  max-width: var(--content-default);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-6);
  flex-wrap: wrap;
}

.how-step {
  background: white;
  border-radius: var(--radius-xl);
  padding: var(--space-8) var(--space-6);
  text-align: center;
  flex: 1;
  min-width: 220px;
  max-width: 300px;
  box-shadow: var(--shadow-sm);
}

.how-icon { font-size: 3.5rem; margin-bottom: var(--space-4); }
.how-step h3 {
  font-size: var(--text-lg);
  margin-bottom: var(--space-3);
  color: var(--color-text);
}
.how-step p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  max-width: 28ch;
  margin: 0 auto;
}

.how-arrow {
  font-size: 2rem;
  color: var(--color-accent);
  font-weight: 900;
}

/* === VALUES SECTION === */
.values-section {
  padding: clamp(var(--space-16), 8vw, var(--space-24)) var(--space-6);
  background: var(--color-bg);
}

.values-section .section-header { text-align: center; margin-bottom: var(--space-12); }

.values-grid {
  max-width: var(--content-default);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: var(--space-6);
}

.value-card {
  background: white;
  border-radius: var(--radius-xl);
  padding: var(--space-8) var(--space-6);
  text-align: center;
  box-shadow: var(--shadow-sm);
  border-top: 5px solid var(--card-color, var(--color-primary));
  transition: transform var(--transition), box-shadow var(--transition);
}

.value-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); }
.value-emoji { font-size: 2.5rem; margin-bottom: var(--space-3); }
.value-card h3 {
  font-size: var(--text-lg);
  margin-bottom: var(--space-2);
  color: var(--card-color, var(--color-text));
}
.value-card p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  max-width: 24ch;
  margin: 0 auto;
}

/* === CERTIFICATE SECTION === */
.certificate-section {
  padding: clamp(var(--space-16), 8vw, var(--space-24)) var(--space-6);
  background: linear-gradient(135deg, #FFF8E8, #FFF0DC);
}

.cert-inner {
  max-width: var(--content-default);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: var(--space-16);
  align-items: center;
}

.cert-visual {
  display: flex;
  justify-content: center;
}

.cert-preview {
  background: white;
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  width: 280px;
  box-shadow: var(--shadow-lg);
  border: 4px solid var(--color-accent);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-4);
  text-align: center;
}

.cert-ribbon { font-size: 4rem; }
.cert-text-preview { width: 100%; display: flex; flex-direction: column; gap: var(--space-3); align-items: center; }
.cert-line {
  border-radius: var(--radius-full);
  background: var(--color-surface-2, #f5f5f5);
}
.cert-line-1 { height: 14px; width: 80%; background: var(--color-primary); opacity: 0.3; }
.cert-line-2 { height: 10px; width: 60%; }
.cert-stars-row { font-size: 1.5rem; letter-spacing: 0.1em; }
.cert-line-3 { height: 8px; width: 50%; }

.cert-content {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.cert-content h2 {
  font-size: var(--text-2xl);
  color: var(--color-text);
}

.cert-content p {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: 1.7;
  max-width: 50ch;
}

/* === FOOTER === */
.footer {
  background: var(--color-text);
  color: white;
  padding: var(--space-12) var(--space-6);
}

.footer-inner {
  max-width: var(--content-default);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-8);
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.footer-emoji { font-size: 2.5rem; }
.footer-name { font-family: var(--font-display); font-size: var(--text-lg); }
.footer-by { font-size: var(--text-xs); color: rgba(255,255,255,0.6); }
.footer-by a { color: var(--color-accent); font-weight: 700; }

.footer-links {
  display: flex;
  gap: var(--space-6);
  flex-wrap: wrap;
}

.footer-links a {
  font-size: var(--text-sm);
  color: rgba(255,255,255,0.7);
  font-weight: 600;
  transition: color var(--transition);
}
.footer-links a:hover { color: white; }

.footer-note {
  font-size: var(--text-xs);
  color: rgba(255,255,255,0.5);
  font-weight: 600;
}

/* ============================================
   LESSON PAGE STYLES
   ============================================ */
.lesson-layout {
  display: grid;
  grid-template-columns: 280px 1fr;
  min-height: calc(100vh - 80px);
}

/* Sidebar */
.lesson-sidebar {
  background: white;
  border-right: 3px solid var(--color-accent);
  padding: var(--space-8) var(--space-6);
  position: sticky;
  top: 80px;
  height: calc(100vh - 80px);
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

.lesson-sidebar-title {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  color: var(--color-primary);
}

.lesson-progress-bar {
  width: 100%;
  height: 12px;
  background: #f0f0f0;
  border-radius: var(--radius-full);
  overflow: hidden;
}

.lesson-progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  border-radius: var(--radius-full);
  transition: width 0.5s ease;
}

.lesson-chapters {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.chapter-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--color-text-muted);
  cursor: pointer;
  transition: background var(--transition), color var(--transition);
  border: none;
  text-align: left;
  background: none;
}

.chapter-item:hover { background: var(--color-surface-2, #fff8e8); color: var(--color-text); }
.chapter-item.active { background: color-mix(in srgb, var(--color-primary) 12%, transparent); color: var(--color-primary); }
.chapter-item.done { color: var(--color-green); }
.chapter-item.done .chapter-check { color: var(--color-green); }

.chapter-num {
  width: 28px;
  height: 28px;
  border-radius: var(--radius-full);
  background: #f0f0f0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 900;
  flex-shrink: 0;
}

.chapter-item.active .chapter-num { background: var(--color-primary); color: white; }
.chapter-item.done .chapter-num { background: var(--color-green); color: white; }

/* Stars earned in sidebar */
.stars-earned {
  display: flex;
  gap: var(--space-1);
  font-size: 1.5rem;
}

/* Main lesson content */
.lesson-main {
  padding: var(--space-10) var(--space-12);
  max-width: 780px;
}

.lesson-header {
  margin-bottom: var(--space-10);
}

.lesson-topic-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  background: color-mix(in srgb, var(--lesson-color, var(--color-primary)) 15%, transparent);
  color: var(--lesson-color, var(--color-primary));
  font-weight: 800;
  font-size: var(--text-xs);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-full);
  margin-bottom: var(--space-4);
}

.lesson-page-title {
  font-size: var(--text-2xl);
  color: var(--color-text);
  margin-bottom: var(--space-4);
}

.lesson-page-subtitle {
  font-size: var(--text-base);
  color: var(--color-text-muted);
}

/* Content blocks */
.content-block {
  display: none;
}

.content-block.active { display: block; }

.story-box {
  background: linear-gradient(135deg, #FFF8E8, #FFF0F5);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  margin-bottom: var(--space-6);
  border-left: 6px solid var(--color-primary);
}

.story-box .story-title {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  margin-bottom: var(--space-4);
  color: var(--color-primary);
}

.story-box p {
  font-size: var(--text-base);
  line-height: 1.8;
  color: var(--color-text);
  margin-bottom: var(--space-4);
  max-width: 65ch;
}

.story-illustration {
  text-align: center;
  font-size: 6rem;
  padding: var(--space-6) 0;
  line-height: 1;
}

.key-concept {
  background: white;
  border: 3px solid var(--color-accent);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  margin-bottom: var(--space-6);
  display: flex;
  gap: var(--space-4);
  align-items: flex-start;
}

.key-concept .concept-icon { font-size: 2.5rem; flex-shrink: 0; }
.key-concept h3 { font-size: var(--text-lg); color: var(--color-text); margin-bottom: var(--space-2); }
.key-concept p { font-size: var(--text-base); color: var(--color-text-muted); max-width: 55ch; }

.example-cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: var(--space-4);
  margin-bottom: var(--space-6);
}

.example-card {
  background: white;
  border-radius: var(--radius-lg);
  padding: var(--space-5) var(--space-4);
  text-align: center;
  box-shadow: var(--shadow-sm);
  border-top: 4px solid var(--card-color, var(--color-primary));
}

.example-card .ex-icon { font-size: 2.5rem; margin-bottom: var(--space-3); }
.example-card h4 { font-size: var(--text-sm); font-family: var(--font-display); margin-bottom: var(--space-2); }
.example-card p { font-size: var(--text-xs); color: var(--color-text-muted); max-width: 22ch; margin: 0 auto; }

/* === QUIZ === */
.quiz-box {
  background: white;
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  border: 3px solid var(--color-blue);
  margin-bottom: var(--space-6);
}

.quiz-label {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  background: var(--color-blue);
  color: white;
  font-weight: 800;
  font-size: var(--text-xs);
  padding: var(--space-1) var(--space-4);
  border-radius: var(--radius-full);
  margin-bottom: var(--space-4);
}

.quiz-question {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  color: var(--color-text);
  margin-bottom: var(--space-6);
  line-height: 1.3;
}

.quiz-options {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.quiz-option {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-4) var(--space-5);
  border-radius: var(--radius-lg);
  border: 3px solid #E0E0E0;
  cursor: pointer;
  transition: all var(--transition);
  font-size: var(--text-base);
  font-weight: 700;
  color: var(--color-text);
  background: white;
  text-align: left;
}

.quiz-option:hover:not([disabled]) {
  border-color: var(--color-blue);
  background: color-mix(in srgb, var(--color-blue) 8%, transparent);
  transform: translateX(4px);
}

.quiz-option.correct {
  border-color: var(--color-green);
  background: color-mix(in srgb, var(--color-green) 12%, transparent);
  color: var(--color-green);
}

.quiz-option.wrong {
  border-color: var(--color-red);
  background: color-mix(in srgb, var(--color-red) 12%, transparent);
  color: var(--color-red);
}

.quiz-option .opt-letter {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  background: #f0f0f0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: var(--text-sm);
  flex-shrink: 0;
}

.quiz-option.correct .opt-letter { background: var(--color-green); color: white; }
.quiz-option.wrong .opt-letter { background: var(--color-red); color: white; }

.quiz-feedback {
  margin-top: var(--space-5);
  padding: var(--space-4) var(--space-5);
  border-radius: var(--radius-lg);
  font-weight: 700;
  font-size: var(--text-base);
  display: none;
}

.quiz-feedback.correct-fb {
  background: color-mix(in srgb, var(--color-green) 15%, transparent);
  color: var(--color-green);
  display: block;
}

.quiz-feedback.wrong-fb {
  background: color-mix(in srgb, var(--color-red) 15%, transparent);
  color: var(--color-red);
  display: block;
}

/* === DRAG & DROP ACTIVITY === */
.drag-activity {
  background: white;
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  border: 3px solid var(--color-purple);
  margin-bottom: var(--space-6);
}

.drag-label {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  background: var(--color-purple);
  color: white;
  font-weight: 800;
  font-size: var(--text-xs);
  padding: var(--space-1) var(--space-4);
  border-radius: var(--radius-full);
  margin-bottom: var(--space-4);
}

.drag-instruction {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  margin-bottom: var(--space-6);
  font-weight: 700;
}

.drag-items {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-bottom: var(--space-6);
}

.drag-item {
  background: color-mix(in srgb, var(--color-purple) 15%, transparent);
  border: 2px dashed var(--color-purple);
  color: var(--color-purple);
  padding: var(--space-3) var(--space-5);
  border-radius: var(--radius-lg);
  font-weight: 800;
  font-size: var(--text-sm);
  cursor: grab;
  transition: transform var(--transition), box-shadow var(--transition);
  user-select: none;
}

.drag-item:hover { transform: scale(1.05); box-shadow: var(--shadow-sm); }
.drag-item.dragging { opacity: 0.4; cursor: grabbing; }

.drop-zones {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: var(--space-4);
}

.drop-zone {
  min-height: 80px;
  border-radius: var(--radius-lg);
  border: 3px dashed #ccc;
  padding: var(--space-4);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  transition: border-color var(--transition), background var(--transition);
}

.drop-zone.drag-over { border-color: var(--color-purple); background: color-mix(in srgb, var(--color-purple) 8%, transparent); }
.drop-zone-label { font-size: var(--text-xs); color: var(--color-text-light); font-weight: 700; }
.drop-zone-content { display: flex; flex-wrap: wrap; gap: var(--space-2); }

/* === NAVIGATION BUTTONS in lessons === */
.lesson-nav-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: var(--space-10);
  padding-top: var(--space-8);
  border-top: 2px solid #f0f0f0;
  gap: var(--space-4);
}

.nav-hint {
  font-size: var(--text-xs);
  color: var(--color-text-light);
  font-weight: 700;
}

/* === COMPLETION MODAL === */
.completion-modal {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-6);
  background: rgba(0,0,0,0.6);
  backdrop-filter: blur(6px);
  display: none;
}

.completion-modal.show { display: flex; }

.completion-card {
  background: white;
  border-radius: var(--radius-xl);
  padding: var(--space-12) var(--space-10);
  max-width: 480px;
  width: 100%;
  text-align: center;
  box-shadow: var(--shadow-lg);
  animation: pop-in 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes pop-in {
  from { transform: scale(0.7); opacity: 0; }
  to { transform: scale(1); opacity: 1; }
}

.completion-emoji { font-size: 6rem; margin-bottom: var(--space-4); animation: bounce 1s ease-in-out infinite; }
.completion-title { font-size: var(--text-2xl); color: var(--color-primary); margin-bottom: var(--space-4); }
.completion-desc { font-size: var(--text-base); color: var(--color-text-muted); margin-bottom: var(--space-8); }
.completion-stars { font-size: 3rem; margin-bottom: var(--space-6); }
.completion-actions { display: flex; gap: var(--space-4); justify-content: center; flex-wrap: wrap; }

/* === CONFETTI CANVAS === */
#confetti-canvas {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 999;
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 900px) {
  .hero-characters { display: none; }
  .hero-content { max-width: 100%; }

  .cert-inner {
    grid-template-columns: 1fr;
    text-align: center;
  }
  .cert-content { align-items: center; }

  .lessons-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-4);
  }

  .map-path { display: none; }

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

  .lesson-sidebar {
    position: static;
    height: auto;
    border-right: none;
    border-bottom: 3px solid var(--color-accent);
  }

  .lesson-main {
    padding: var(--space-6);
  }
}

@media (max-width: 600px) {
  .header-nav { display: none; }

  .how-arrow { display: none; }
  .how-grid { flex-direction: column; align-items: center; }

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

  .lesson-5 {
    grid-column: 1 / -1;
  }

  .footer-inner {
    flex-direction: column;
    text-align: center;
    align-items: center;
  }

  .stats-inner { gap: var(--space-4); }
  .stat-divider { display: none; }
}