/* ========== CSS VARIABLES ========== */
:root {
  --bg-primary: #0a0f1e;
  --bg-secondary: #111827;
  --bg-card: #1a2234;
  --bg-card-hover: #1e2d44;
  --bg-surface: #243044;
  --bg-input: #162030;

  --text-primary: #f0f4ff;
  --text-secondary: #8b9dc3;
  --text-muted: #4a5a7a;

  --accent: #4f63ff;
  --accent-light: #7c8fff;
  --accent-dark: #3347cc;
  --accent-glow: rgba(79, 99, 255, 0.35);

  --success: #10b981;
  --success-bg: rgba(16, 185, 129, 0.15);
  --success-border: rgba(16, 185, 129, 0.4);
  --error: #ef4444;
  --error-bg: rgba(239, 68, 68, 0.15);
  --error-border: rgba(239, 68, 68, 0.4);
  --warning: #f59e0b;
  --warning-bg: rgba(245, 158, 11, 0.15);
  --warning-border: rgba(245, 158, 11, 0.4);

  --africa: #f97316;
  --americas: #22c55e;
  --asia: #ec4899;
  --europe: #6366f1;
  --oceania: #06b6d4;

  --border: rgba(255, 255, 255, 0.08);
  --border-hover: rgba(255, 255, 255, 0.15);
  --border-active: rgba(79, 99, 255, 0.5);

  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.5);
  --shadow-accent: 0 4px 20px rgba(79, 99, 255, 0.4);

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --radius-full: 9999px;

  --nav-height: 64px;
  --max-width: 1200px;
  --transition: 0.2s ease;
  --transition-slow: 0.4s ease;
  --font: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
button { font-family: var(--font); cursor: pointer; border: none; background: none; }
img { max-width: 100%; display: block; }

::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: var(--bg-secondary); }
::-webkit-scrollbar-thumb { background: var(--bg-surface); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }

/* ========== LOADING SCREEN ========== */
#loading-screen {
  position: fixed;
  inset: 0;
  background: var(--bg-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  transition: opacity 0.5s ease, visibility 0.5s ease;
}
#loading-screen.hidden { opacity: 0; visibility: hidden; }

.loader-content {
  text-align: center;
  animation: fadeInUp 0.5s ease;
}
.loader-globe {
  font-size: 5rem;
  animation: spin 2s linear infinite;
  display: inline-block;
  margin-bottom: 1rem;
}
.loader-content p {
  color: var(--text-secondary);
  font-size: 1.1rem;
  font-weight: 500;
}

@keyframes spin { from { transform: rotate(0deg); } to { transform: rotate(360deg); } }
@keyframes fadeInUp { from { opacity: 0; transform: translateY(20px); } to { opacity: 1; transform: translateY(0); } }

/* ========== NAVBAR ========== */
#navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  background: rgba(10, 15, 30, 0.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 2.5rem;
  z-index: 1000;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  font-weight: 700;
  font-size: 1.2rem;
  color: var(--text-primary);
  transition: opacity var(--transition);
  flex-shrink: 0;
  letter-spacing: -0.01em;
}
.nav-brand:hover { opacity: 0.75; }
.nav-logo { font-size: 1.4rem; }

.nav-links {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex: 1;
  justify-content: center;
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  flex-shrink: 0;
  padding-left: 1rem;
  border-left: 1px solid var(--border);
}

.nav-link {
  color: var(--text-secondary);
  font-size: 0.875rem;
  font-weight: 500;
  padding: 0.4rem 0.75rem;
  border-radius: var(--radius-sm);
  transition: color var(--transition);
  white-space: nowrap;
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  position: relative;
}
.nav-link:hover {
  color: var(--text-primary);
}
.nav-link.active {
  color: var(--text-primary);
  font-weight: 600;
}
.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0.75rem;
  right: 0.75rem;
  height: 2px;
  background: var(--accent);
  border-radius: 2px;
}

/* ── Nav notification dot (new unlocked titles) ── */
.nav-link.has-notif::before {
  content: '';
  position: absolute;
  top: 3px;
  right: 3px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #e74c3c;
  border: 1.5px solid var(--bg-nav, #0f172a);
}

/* Dropdown */
.nav-dropdown { position: relative; }
.nav-dropdown-btn {
  color: var(--text-secondary);
  font-size: 0.875rem;
  font-weight: 500;
  padding: 0.4rem 0.75rem;
  border-radius: var(--radius-sm);
  transition: color var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}
.nav-dropdown-btn:hover { color: var(--text-primary); }
.nav-dropdown-btn .arrow { transition: transform 0.2s; font-size: 0.65rem; opacity: 0.5; }
.nav-dropdown:hover .nav-dropdown-btn { color: var(--text-primary); }
.nav-dropdown:hover .arrow { transform: rotate(180deg); }

.nav-dropdown-menu {
  position: absolute;
  top: calc(100% + 0.75rem);
  right: 0;
  min-width: 210px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 0.4rem;
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-6px);
  transition: all 0.18s ease;
  z-index: 100;
}
.nav-dropdown:hover .nav-dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.nav-dropdown-item {
  display: block;
  padding: 0.6rem 0.9rem;
  color: var(--text-secondary);
  font-size: 0.875rem;
  font-weight: 500;
  border-radius: var(--radius-sm);
  transition: all var(--transition);
}
.nav-dropdown-item:hover { color: var(--text-primary); background: rgba(255,255,255,0.06); }

/* Language Switch (kept hidden in nav, reused if needed) */
.lang-switch {
  display: flex;
  align-items: center;
  gap: 0;
  flex-shrink: 0;
  background: rgba(255,255,255,0.06);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 3px 4px;
}
.lang-switch-btn {
  height: 26px;
  min-width: 32px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0 8px;
  border: none;
  background: transparent;
  color: var(--text-muted);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  cursor: pointer;
  transition: all 0.18s ease;
}
.lang-switch-sep {
  color: var(--border);
  font-size: 0.75rem;
  line-height: 1;
  pointer-events: none;
  user-select: none;
}
.lang-switch-btn.active {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 0 8px var(--accent-glow);
}
.lang-switch-btn:hover:not(.active) {
  color: var(--text-primary);
  background: rgba(255,255,255,0.07);
}

/* Hamburger */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  margin-left: 1rem;
  border-radius: var(--radius-sm);
  transition: background var(--transition);
}
.nav-toggle:hover { background: rgba(255,255,255,0.07); }
.nav-toggle span {
  width: 22px; height: 2px;
  background: var(--text-secondary);
  border-radius: 2px;
  transition: all 0.3s ease;
  display: block;
}
.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ========== MAIN CONTENT ========== */
#app {
  padding-top: var(--nav-height);
  min-height: 100vh;
}

.page {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 2rem 1.5rem;
  animation: fadeInUp 0.3s ease;
}

.page-title {
  font-size: 2rem;
  font-weight: 800;
  margin-bottom: 0.4rem;
  background: linear-gradient(135deg, var(--text-primary), var(--accent-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.page-subtitle {
  color: var(--text-secondary);
  font-size: 1rem;
  margin-bottom: 2rem;
}

/* ========== HOME PAGE ========== */
.hero {
  text-align: center;
  padding: 4rem 1rem 3rem;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  inset: -50%;
  background: radial-gradient(ellipse at center, rgba(79, 99, 255, 0.12) 0%, transparent 70%);
  pointer-events: none;
}
.hero-globe {
  font-size: 5rem;
  display: inline-block;
  animation: float 3s ease-in-out infinite;
  margin-bottom: 1.5rem;
  filter: drop-shadow(0 0 30px rgba(79, 99, 255, 0.4));
}
@keyframes float {
  0%, 100% { transform: translateY(0) rotate(0deg); }
  50% { transform: translateY(-12px) rotate(5deg); }
}
.hero-title {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 1rem;
  background: linear-gradient(135deg, #fff 0%, var(--accent-light) 50%, #a5b4fc 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-subtitle {
  font-size: 1.15rem;
  color: var(--text-secondary);
  max-width: 560px;
  margin: 0 auto 2.5rem;
  line-height: 1.7;
}
.hero-actions {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

.home-stats {
  display: flex;
  justify-content: center;
  gap: 3rem;
  padding: 2rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  margin: 0 0 3rem;
  flex-wrap: wrap;
}
.home-stat {
  text-align: center;
}
.home-stat-number {
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--accent-light);
  line-height: 1;
}
.home-stat-label {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 0.25rem;
  font-weight: 500;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.25rem;
  margin-bottom: 3rem;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  cursor: pointer;
  transition: all var(--transition);
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  position: relative;
  overflow: hidden;
}
.feature-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, transparent, rgba(79, 99, 255, 0.05));
  opacity: 0;
  transition: opacity var(--transition);
}
.feature-card:hover { border-color: var(--border-active); transform: translateY(-3px); box-shadow: var(--shadow-accent); }
.feature-card:hover::before { opacity: 1; }
.feature-card-icon { font-size: 2.5rem; }
.feature-card-title { font-size: 1.2rem; font-weight: 700; }
.feature-card-desc { font-size: 0.875rem; color: var(--text-secondary); line-height: 1.6; }
.feature-card-arrow {
  margin-top: auto;
  color: var(--accent-light);
  font-size: 0.875rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 0.4rem;
  transition: gap var(--transition);
}
.feature-card:hover .feature-card-arrow { gap: 0.75rem; }

/* ========== TOAST ========== */
#toast-container {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  z-index: 9999;
  pointer-events: none;
}

/* ========== STATS PAGE ========== */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 1rem;
  margin-bottom: 2rem;
}
.stats-grid-5 {
  grid-template-columns: repeat(5, 1fr);
}
.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  text-align: center;
}
.stat-card-number {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--accent-light);
  line-height: 1;
}
.stat-card-label {
  color: var(--text-secondary);
  font-size: 0.85rem;
  margin-top: 0.4rem;
  font-weight: 500;
}

.continent-progress { margin-bottom: 2rem; }
.continent-progress h3 { font-size: 1.2rem; font-weight: 700; margin-bottom: 1rem; }
.continent-progress-item {
  margin-bottom: 0.75rem;
}
.continent-progress-header {
  display: flex;
  justify-content: space-between;
  font-size: 0.875rem;
  margin-bottom: 0.3rem;
}
.progress-bar-track {
  height: 8px;
  background: var(--bg-surface);
  border-radius: var(--radius-full);
  overflow: hidden;
}
.progress-bar-fill {
  height: 100%;
  border-radius: var(--radius-full);
  transition: width 0.6s ease;
}

.hard-countries { margin-bottom: 2rem; }
.hard-countries h3 { font-size: 1.2rem; font-weight: 700; margin-bottom: 1rem; }
.hard-country-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
.hard-country-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 0.75rem 1rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}
.hard-country-item {
  cursor: pointer;
}
.hard-country-item:hover {
  background: var(--bg-surface);
}
.hard-country-pct {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-primary);
}
.hard-country-chevron {
  color: var(--text-muted);
  font-size: 0.7rem;
  flex-shrink: 0;
  margin-left: 0.25rem;
}
.hard-country-detail {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 0.75rem 1rem;
}
.hard-country-detail-inner {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
.hard-detail-legend {
  font-size: 0.72rem;
  color: var(--text-muted);
  padding-bottom: 0.5rem;
  margin-bottom: 0.25rem;
  border-bottom: 1px solid var(--border);
}
.hard-detail-type {
  display: flex;
  align-items: center;
  gap: 1rem;
  font-size: 0.82rem;
}

/* ========== STATS PAGE V2 ========== */
.stats-section { margin-bottom: 2rem; }
.stats-section-title { font-size: 1.2rem; font-weight: 700; margin-bottom: 0.25rem; }
.stats-section-hint { font-size: 0.8rem; color: var(--text-muted); margin-bottom: 1rem; }

.info-tooltip {
  font-size: 0.85em;
  opacity: 0.55;
  vertical-align: middle;
  position: relative;
  display: inline-block;
  cursor: default;
}
/* MUI-style tooltip bubble */
.info-tooltip::before,
.info-tooltip::after {
  pointer-events: none;
  position: absolute;
  left: 50%;
  opacity: 0;
  transition: opacity 0s;
  z-index: 100;
}
/* bubble */
.info-tooltip::after {
  content: attr(data-tooltip);
  bottom: calc(100% + 8px);
  transform: translateX(-50%);
  background: rgba(97, 97, 97, 0.92);
  color: #fff;
  border-radius: 4px;
  padding: 0.3rem 0.55rem;
  font-size: 0.6875rem;
  font-weight: 500;
  line-height: 1.4;
  letter-spacing: 0.01em;
  white-space: pre-wrap;
  width: max-content;
  max-width: 260px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.25);
}
/* arrow */
.info-tooltip::before {
  content: '';
  bottom: calc(100% + 2px);
  transform: translateX(-50%);
  border: 5px solid transparent;
  border-top-color: rgba(97, 97, 97, 0.92);
}
.info-tooltip:hover { opacity: 1; }
.info-tooltip:hover::before,
.info-tooltip:hover::after { opacity: 1; }

.continent-cards-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 1rem;
  margin-bottom: 0.75rem;
}
.continent-ring-card {
  background: var(--bg-card);
  border: 2px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1rem 0.5rem 0.75rem;
  cursor: pointer;
  text-align: center;
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
  user-select: none;
}
.continent-ring-card:hover { border-color: var(--border-hover); transform: translateY(-3px); box-shadow: var(--shadow-md); }
.continent-ring-card.active { border-color: var(--border-active); box-shadow: 0 0 0 1px var(--border-active), var(--shadow-md); }
.continent-ring-svg { width: 100%; max-width: 100px; display: block; margin: 0 auto; }
.continent-ring-name { font-weight: 700; font-size: 0.85rem; margin-top: 0.5rem; color: var(--text-primary); }
.continent-ring-sub { font-size: 0.7rem; color: var(--text-muted); margin-top: 0.15rem; }

.continent-detail-panel {
  background: var(--bg-card);
  border: 1px solid var(--border-active);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  margin-bottom: 0.5rem;
  animation: fadeInUp 0.2s ease;
}
.continent-detail-header { display: flex; align-items: center; gap: 0.75rem; margin-bottom: 1rem; font-size: 1.15rem; font-weight: 700; }
.continent-type-stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0.75rem; margin-bottom: 1.25rem; }
.continent-type-stat { background: var(--bg-surface); border-radius: var(--radius-md); padding: 0.75rem; text-align: center; }

.country-progress-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 0.4rem;
  max-height: 380px;
  overflow-y: auto;
}
.country-progress-item {
  background: var(--bg-surface);
  border-radius: var(--radius-sm);
  padding: 0.4rem 0.6rem;
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.78rem;
}
.country-clickable { cursor: pointer; transition: background var(--transition); }
.country-clickable:hover { background: var(--bg-card-hover); }

.mastery-indicator {
  display: inline-flex; align-items: center; justify-content: center;
  font-size: 0.6rem; width: 18px; height: 18px; border-radius: 4px; flex-shrink: 0;
}
.mastery-indicator.ok   { background: var(--success-bg); }
.mastery-indicator.fail { background: var(--error-bg); }
.mastery-indicator.none { background: var(--bg-surface); opacity: 0.4; }

.type-cards-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; margin-bottom: 0.75rem; }
.type-card {
  background: var(--bg-card);
  border: 2px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  cursor: pointer;
  transition: border-color var(--transition), transform var(--transition);
  user-select: none;
}
.type-card:hover { border-color: var(--border-hover); transform: translateY(-2px); }
.type-card.active { border-color: var(--border-active); }
.type-card-header { display: flex; align-items: center; gap: 0.5rem; font-weight: 700; font-size: 1rem; margin-bottom: 0.75rem; }
.type-card-stats { font-size: 2rem; font-weight: 800; color: var(--accent-light); line-height: 1; }
.type-card-sub { font-size: 0.75rem; color: var(--text-muted); margin-top: 0.3rem; }

/* ========== RESPONSIVE ========== */
@media (max-width: 768px) {
  #navbar { padding: 0 1rem; }
  .nav-toggle { display: flex; }
  .nav-right { padding-left: 0.5rem; border-left: none; gap: 0.4rem; }
  .nav-links {
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    align-items: stretch;
    padding: 1rem;
    gap: 0.25rem;
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    margin-left: 0;
    z-index: 999;
  }
  .nav-links.open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }
  .nav-link, .nav-dropdown-btn {
    width: 100%;
    padding: 0.75rem 1rem;
    font-size: 1rem;
  }
  .nav-dropdown-menu {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    box-shadow: none;
    border: none;
    background: transparent;
    padding-left: 1rem;
  }
  .nav-dropdown:hover .nav-dropdown-menu { transform: none; }

  .hero { padding: 2rem 1rem; }
  .home-stats { gap: 1.5rem; padding: 1.5rem; }
  .features-grid { grid-template-columns: 1fr; }
  .page { padding: 1.5rem 1rem; }
  .continent-cards-grid { grid-template-columns: repeat(3, 1fr); }
  .type-cards-grid { grid-template-columns: 1fr; }
  .continent-type-stats { grid-template-columns: 1fr; gap: 0.5rem; }
  .stats-grid-5 { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 480px) {
  .continent-cards-grid { grid-template-columns: repeat(2, 1fr); }
  .country-progress-list { grid-template-columns: 1fr; }
  .stats-grid-5 { grid-template-columns: repeat(2, 1fr); }
  .page-title { font-size: 1.65rem; }
  .page-subtitle { font-size: 0.875rem; margin-bottom: 1.25rem; }
  .home-stats { gap: 1rem; padding: 1rem; }
  .home-stat-number { font-size: 1.8rem; }
}

/* ========== HOME PAGE V2 ========== */
.home-hero {
  position: relative;
  overflow: hidden;
  text-align: center;
  padding: 5rem 1.5rem 4rem;
}
.home-hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 90% 60% at 50% 10%, rgba(79,99,255,0.2) 0%, transparent 65%),
    radial-gradient(circle at 15% 85%, rgba(124,58,237,0.1) 0%, transparent 45%),
    radial-gradient(circle at 85% 70%, rgba(79,99,255,0.08) 0%, transparent 45%);
  pointer-events: none;
  z-index: 0;
}
.home-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle, rgba(255,255,255,0.1) 1px, transparent 1px);
  background-size: 38px 38px;
  pointer-events: none;
  -webkit-mask-image: radial-gradient(ellipse 85% 75% at 50% 20%, black 0%, transparent 70%);
  mask-image: radial-gradient(ellipse 85% 75% at 50% 20%, black 0%, transparent 70%);
  z-index: 0;
}
.home-hero-content {
  position: relative;
  z-index: 1;
  max-width: 680px;
  margin: 0 auto;
}
.home-nightmare-btn {
  background: linear-gradient(135deg, #7c3aed, #dc2626);
  color: white;
  border: none;
  box-shadow: 0 4px 20px rgba(124,58,237,0.35);
}
.home-nightmare-btn:hover {
  box-shadow: 0 6px 28px rgba(124,58,237,0.5);
  transform: translateY(-2px);
}
.home-pills {
  display: flex;
  gap: 0.5rem;
  justify-content: center;
  flex-wrap: wrap;
  margin: 0 auto 2rem;
  max-width: 540px;
}
.home-pill {
  background: rgba(79,99,255,0.12);
  border: 1px solid rgba(79,99,255,0.28);
  border-radius: var(--radius-full);
  padding: 0.3rem 0.85rem;
  font-size: 0.78rem;
  color: var(--accent-light);
  font-weight: 500;
  letter-spacing: 0.01em;
}
.home-content {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem 4rem;
}
.home-section { margin-bottom: 3rem; }
.home-section-header { margin-bottom: 1.5rem; }
.home-section-title {
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: 0.3rem;
}
.home-section-sub {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

/* ── Learning Tracks ── */
.home-tracks {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}
.home-track {
  display: flex;
  align-items: flex-start;
  gap: 1.1rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-top-width: 3px;
  border-radius: var(--radius-lg);
  padding: 1.4rem 1.25rem;
  text-decoration: none;
  color: inherit;
  transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
  position: relative;
  overflow: hidden;
}
.home-track::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, transparent, rgba(79,99,255,0.04));
  opacity: 0;
  transition: opacity var(--transition);
}
.home-track:hover { transform: translateY(-3px); box-shadow: var(--shadow-accent); }
.home-track:hover::before { opacity: 1; }
.home-track-flags { border-top-color: var(--accent); }
.home-track-flags:hover { border-color: var(--accent); border-top-color: var(--accent); }
.home-track-caps  { border-top-color: var(--success); }
.home-track-caps:hover  { border-color: var(--success); border-top-color: var(--success); }
.home-track-map   { border-top-color: var(--oceania); }
.home-track-map:hover   { border-color: var(--oceania); border-top-color: var(--oceania); }
.home-track-icon { font-size: 2rem; flex-shrink: 0; line-height: 1; padding-top: 0.1rem; }
.home-track-body { flex: 1; min-width: 0; }
.home-track-title { font-size: 1rem; font-weight: 700; margin-bottom: 0.3rem; }
.home-track-desc  { font-size: 0.8rem; color: var(--text-secondary); line-height: 1.5; margin-bottom: 0.75rem; }
.home-track-progress {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.72rem;
  color: var(--text-muted);
  font-weight: 600;
}
.home-track-bar {
  flex: 1;
  height: 5px;
  background: var(--bg-surface);
  border-radius: 999px;
  overflow: hidden;
}
.home-track-fill {
  height: 100%;
  border-radius: 999px;
  transition: width 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}
.home-track-flags .home-track-fill { background: var(--accent); }
.home-track-caps  .home-track-fill { background: var(--success); }
.home-track-map   .home-track-fill { background: var(--oceania); }
.home-track-arrow {
  font-size: 1rem;
  color: var(--text-muted);
  flex-shrink: 0;
  align-self: center;
  transition: transform var(--transition), color var(--transition);
}
.home-track:hover .home-track-arrow { transform: translateX(4px); color: var(--accent-light); }

/* ── Hero Buttons ── */
.btn-hero-quiz {
  background: var(--accent);
  color: #fff;
  border: none;
  box-shadow: 0 4px 18px rgba(79,99,255,0.45);
}
.btn-hero-quiz:hover {
  background: var(--accent-dark);
  box-shadow: 0 6px 26px rgba(79,99,255,0.6);
  transform: translateY(-2px);
}
.btn-hero-map {
  background: rgba(6,182,212,0.12);
  color: #22d3ee;
  border: 1px solid rgba(6,182,212,0.4);
}
.btn-hero-map:hover {
  background: rgba(6,182,212,0.22);
  border-color: rgba(6,182,212,0.65);
  transform: translateY(-2px);
}
.btn-hero-lb {
  background: rgba(245,158,11,0.12);
  color: #fbbf24;
  border: 1px solid rgba(245,158,11,0.4);
}
.btn-hero-lb:hover {
  background: rgba(245,158,11,0.22);
  border-color: rgba(245,158,11,0.65);
  transform: translateY(-2px);
}

/* ── Quiz Pick Modal ── */
.quiz-pick-modal {
  position: fixed;
  inset: 0;
  z-index: 8000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.25s ease, visibility 0.25s ease;
}
.quiz-pick-modal.open { opacity: 1; visibility: visible; }
.quiz-pick-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0.65);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}
.quiz-pick-content {
  position: relative;
  z-index: 1;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 2rem;
  width: 100%;
  max-width: 580px;
  transform: scale(0.94) translateY(12px);
  transition: transform 0.25s cubic-bezier(0.34,1.56,0.64,1);
}
.quiz-pick-modal.open .quiz-pick-content { transform: scale(1) translateY(0); }
.quiz-pick-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.5rem;
}
.quiz-pick-header h3 { font-size: 1.15rem; font-weight: 700; }
.quiz-pick-close {
  width: 32px; height: 32px;
  border-radius: 50%;
  background: var(--bg-surface);
  color: var(--text-secondary);
  font-size: 0.85rem;
  display: flex; align-items: center; justify-content: center;
  transition: background var(--transition), color var(--transition);
}
.quiz-pick-close:hover { background: var(--error-bg); color: var(--error); }
.quiz-pick-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
}
.quiz-pick-item {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  padding: 1.2rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  border-top-width: 3px;
  background: var(--bg-card);
  text-decoration: none;
  color: inherit;
  transition: transform var(--transition), box-shadow var(--transition);
}
.quiz-pick-item:hover { transform: translateY(-2px); }
.quiz-pick-icon { font-size: 1.6rem; }
.quiz-pick-name { font-size: 0.95rem; font-weight: 700; }
.quiz-pick-desc { font-size: 0.75rem; color: var(--text-secondary); line-height: 1.45; }
.quiz-pick-flags { border-top-color: var(--accent); }
.quiz-pick-flags:hover { border-color: var(--accent); box-shadow: 0 4px 16px rgba(79,99,255,0.18); }
.quiz-pick-caps  { border-top-color: var(--success); }
.quiz-pick-caps:hover  { border-color: var(--success); box-shadow: 0 4px 16px rgba(16,185,129,0.18); }
.quiz-pick-map   { border-top-color: var(--oceania); }
.quiz-pick-map:hover   { border-color: var(--oceania); box-shadow: 0 4px 16px rgba(6,182,212,0.18); }
.quiz-pick-night { border-top-color: #7c3aed; }
.quiz-pick-night:hover { border-color: #7c3aed; box-shadow: 0 4px 16px rgba(124,58,237,0.18); }
.quiz-pick-challenge { border-top-color: #ef4444; }
.quiz-pick-challenge:hover { border-color: #ef4444; box-shadow: 0 4px 16px rgba(239,68,68,0.18); }
.quiz-pick-group { border-top-color: #f59e0b; }
.quiz-pick-group:hover { border-color: #f59e0b; box-shadow: 0 4px 16px rgba(245,158,11,0.18); }
@media (max-width: 480px) {
  .quiz-pick-grid { grid-template-columns: 1fr; }
  .quiz-pick-content { padding: 1.5rem 1rem; }
}

/* ── First-time CTA Banner ── */
.home-cta-banner {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  background: linear-gradient(135deg, rgba(79,99,255,0.1), rgba(124,58,237,0.07));
  border: 1px solid rgba(79,99,255,0.3);
  border-radius: var(--radius-lg);
  padding: 1.75rem 2rem;
  flex-wrap: wrap;
}
.home-cta-icon { font-size: 2.5rem; flex-shrink: 0; }
.home-cta-body { flex: 1; min-width: 200px; }
.home-cta-title { font-size: 1.1rem; font-weight: 700; margin-bottom: 0.35rem; }
.home-cta-desc { font-size: 0.875rem; color: var(--text-secondary); }

@media (max-width: 768px) {
  .home-tracks { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
  .home-hero { padding: 3rem 1rem 2.5rem; }
  .home-pills { gap: 0.35rem; }
  .home-pill { font-size: 0.72rem; padding: 0.25rem 0.65rem; }
  .home-cta-banner { flex-direction: column; text-align: center; padding: 1.25rem; }
  .home-cta-banner .btn { width: 100%; justify-content: center; }
}