/* ============================================================================
   OTTERLY GAMES — Brand Stylesheet
   Built with love by a mom who gets it 🦦
   ============================================================================ */

/* --- Google Fonts --- */
@import url('https://fonts.googleapis.com/css2?family=Nunito:wght@400;600;700;800;900&family=Inter:wght@400;500;600&display=swap');

/* --- CSS Custom Properties --- */
:root {
  /* Brand Colors */
  --ocean-teal: #0D9488;
  --ocean-teal-light: #14B8A6;
  --ocean-teal-dark: #0F766E;
  --warm-amber: #F59E0B;
  --warm-amber-light: #FBBF24;
  --soft-cream: #FFF8F0;
  --deep-navy: #1E293B;
  --coral-pink: #FB7185;
  --coral-pink-dark: #E11D48;
  --lavender: #A78BFA;
  --lavender-light: #C4B5FD;
  --sky-blue: #38BDF8;

  /* Neutrals */
  --white: #FFFFFF;
  --gray-50: #F8FAFC;
  --gray-100: #F1F5F9;
  --gray-200: #E2E8F0;
  --gray-300: #CBD5E1;
  --gray-400: #94A3B8;
  --gray-500: #64748B;
  --gray-600: #475569;
  --gray-700: #334155;
  --gray-800: #1E293B;

  /* Typography */
  --font-heading: 'Nunito', sans-serif;
  --font-body: 'Inter', sans-serif;

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --space-4xl: 6rem;

  /* Border Radius */
  --radius-sm: 0.5rem;
  --radius-md: 0.75rem;
  --radius-lg: 1rem;
  --radius-xl: 1.5rem;
  --radius-2xl: 2rem;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.07), 0 2px 4px -2px rgba(0,0,0,0.05);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.08), 0 4px 6px -4px rgba(0,0,0,0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.08), 0 8px 10px -6px rgba(0,0,0,0.04);
  --shadow-glow-teal: 0 0 30px rgba(13,148,136,0.3);
  --shadow-glow-amber: 0 0 30px rgba(245,158,11,0.3);
  --shadow-glow-pink: 0 0 30px rgba(251,113,133,0.3);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 400ms ease;

  /* Layout */
  --max-width: 1200px;
  --nav-height: 72px;
}

/* --- Reset & Base --- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  color: var(--deep-navy);
  background: var(--soft-cream);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }
ul, ol { list-style: none; }
h1, h2, h3, h4, h5, h6 { font-family: var(--font-heading); font-weight: 800; line-height: 1.2; }

/* --- Utility Classes --- */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.sr-only {
  position: absolute; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}

.text-center { text-align: center; }
.text-gradient {
  background: linear-gradient(135deg, var(--ocean-teal), var(--lavender));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.text-gradient-warm {
  background: linear-gradient(135deg, var(--coral-pink), var(--warm-amber));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 0.875rem 2rem;
  border-radius: var(--radius-full);
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1rem;
  transition: all var(--transition-base);
  text-decoration: none;
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(135deg, var(--ocean-teal), var(--ocean-teal-light));
  color: var(--white);
  box-shadow: var(--shadow-lg), var(--shadow-glow-teal);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-xl), 0 0 40px rgba(13,148,136,0.4);
}

.btn-secondary {
  background: var(--white);
  color: var(--ocean-teal);
  border: 2px solid var(--ocean-teal-light);
  box-shadow: var(--shadow-md);
}
.btn-secondary:hover {
  background: var(--ocean-teal);
  color: var(--white);
  transform: translateY(-2px);
}

.btn-coral {
  background: linear-gradient(135deg, var(--coral-pink), var(--coral-pink-dark));
  color: var(--white);
  box-shadow: var(--shadow-lg), var(--shadow-glow-pink);
}
.btn-coral:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-xl), 0 0 40px rgba(251,113,133,0.4);
}

.btn-amber {
  background: linear-gradient(135deg, var(--warm-amber), var(--warm-amber-light));
  color: var(--deep-navy);
  box-shadow: var(--shadow-lg), var(--shadow-glow-amber);
}
.btn-amber:hover {
  transform: translateY(-2px);
}

.btn-sm {
  padding: 0.625rem 1.5rem;
  font-size: 0.875rem;
}

.btn-lg {
  padding: 1rem 2.5rem;
  font-size: 1.125rem;
}

/* --- Section Styles --- */
.section {
  padding: var(--space-4xl) 0;
}

.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto var(--space-3xl);
}

.section-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: 0.375rem 1rem;
  background: linear-gradient(135deg, rgba(13,148,136,0.1), rgba(167,139,250,0.1));
  border: 1px solid rgba(13,148,136,0.2);
  border-radius: var(--radius-full);
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 0.8125rem;
  color: var(--ocean-teal);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-md);
}

.section-title {
  font-size: clamp(1.75rem, 4vw, 2.75rem);
  color: var(--deep-navy);
  margin-bottom: var(--space-md);
}

.section-subtitle {
  font-size: 1.125rem;
  color: var(--gray-500);
  line-height: 1.7;
}

/* --- Navigation --- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  background: rgba(255,248,240,0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(0,0,0,0.06);
  z-index: 1000;
  transition: all var(--transition-base);
}

.nav.scrolled {
  box-shadow: var(--shadow-md);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: 1.375rem;
  color: var(--deep-navy);
  text-decoration: none;
}

.nav-brand svg {
  width: 40px;
  height: 40px;
}

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

.nav-link {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.9375rem;
  color: var(--gray-600);
  transition: color var(--transition-fast);
  position: relative;
}

.nav-link:hover, .nav-link.active {
  color: var(--ocean-teal);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--ocean-teal);
  border-radius: 1px;
  transition: width var(--transition-base);
}

.nav-link:hover::after, .nav-link.active::after {
  width: 100%;
}

.nav-cta {
  padding: 0.5rem 1.25rem;
  background: linear-gradient(135deg, var(--ocean-teal), var(--ocean-teal-light));
  color: var(--white);
  border-radius: var(--radius-full);
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 0.875rem;
  transition: all var(--transition-base);
}

.nav-cta:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-lg);
}

/* Mobile Menu */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2.5px;
  background: var(--deep-navy);
  border-radius: 2px;
  transition: all var(--transition-base);
}

.nav-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}
.nav-toggle.active span:nth-child(2) {
  opacity: 0;
}
.nav-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

@media (max-width: 768px) {
  .nav-toggle {
    display: flex;
  }
  .nav-links {
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: var(--soft-cream);
    flex-direction: column;
    padding: var(--space-xl);
    gap: var(--space-lg);
    border-bottom: 1px solid var(--gray-200);
    transform: translateY(-100%);
    opacity: 0;
    pointer-events: none;
    transition: all var(--transition-base);
  }
  .nav-links.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }
}

/* --- Hero Section --- */
.hero {
  padding-top: calc(var(--nav-height) + var(--space-3xl));
  padding-bottom: var(--space-4xl);
  background: 
    radial-gradient(ellipse at 20% 50%, rgba(13,148,136,0.08) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 20%, rgba(167,139,250,0.08) 0%, transparent 50%),
    radial-gradient(ellipse at 60% 80%, rgba(251,113,133,0.06) 0%, transparent 50%);
  position: relative;
  overflow: hidden;
}

.hero-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3xl);
  align-items: center;
}

.hero-content {
  position: relative;
  z-index: 2;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 0.5rem 1.25rem;
  background: rgba(255,255,255,0.8);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-full);
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 0.875rem;
  color: var(--ocean-teal-dark);
  margin-bottom: var(--space-lg);
  backdrop-filter: blur(10px);
}

.hero-title {
  font-size: clamp(2.25rem, 5.5vw, 3.75rem);
  color: var(--deep-navy);
  margin-bottom: var(--space-lg);
  line-height: 1.1;
}

.hero-subtitle {
  font-size: 1.1875rem;
  color: var(--gray-500);
  margin-bottom: var(--space-2xl);
  line-height: 1.7;
  max-width: 520px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
  margin-bottom: var(--space-2xl);
}

.hero-stats {
  display: flex;
  gap: var(--space-2xl);
}

.hero-stat {
  text-align: center;
}

.hero-stat-value {
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: 1.5rem;
  color: var(--ocean-teal);
}

.hero-stat-label {
  font-size: 0.8125rem;
  color: var(--gray-400);
  font-weight: 500;
}

.hero-visual {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 400px;
}

/* Otter Mascot SVG */
.otter-mascot {
  width: 320px;
  height: 320px;
  animation: otterFloat 4s ease-in-out infinite;
  filter: drop-shadow(0 20px 40px rgba(13,148,136,0.2));
}

@keyframes otterFloat {
  0%, 100% { transform: translateY(0) rotate(-2deg); }
  50% { transform: translateY(-15px) rotate(2deg); }
}

/* Floating decorative elements */
.hero-float {
  position: absolute;
  animation: floatGentle 5s ease-in-out infinite;
}

.hero-float:nth-child(2) { animation-delay: -1s; }
.hero-float:nth-child(3) { animation-delay: -2s; }
.hero-float:nth-child(4) { animation-delay: -3s; }

@keyframes floatGentle {
  0%, 100% { transform: translateY(0) rotate(0deg); }
  50% { transform: translateY(-10px) rotate(5deg); }
}

/* Bubble animations */
.bubble {
  position: absolute;
  border-radius: 50%;
  opacity: 0.15;
  animation: bubbleRise 6s ease-in-out infinite;
}

@keyframes bubbleRise {
  0% { transform: translateY(0) scale(1); opacity: 0.15; }
  50% { transform: translateY(-30px) scale(1.1); opacity: 0.25; }
  100% { transform: translateY(0) scale(1); opacity: 0.15; }
}

@media (max-width: 768px) {
  .hero-inner {
    grid-template-columns: 1fr;
    text-align: center;
  }
  .hero-subtitle { margin-left: auto; margin-right: auto; }
  .hero-actions { justify-content: center; }
  .hero-stats { justify-content: center; }
  .hero-visual { min-height: 280px; }
  .otter-mascot { width: 240px; height: 240px; }
}

/* --- Trust Bar --- */
.trust-bar {
  padding: var(--space-2xl) 0;
  background: var(--white);
  border-top: 1px solid var(--gray-100);
  border-bottom: 1px solid var(--gray-100);
}

.trust-items {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-lg);
}

.trust-item {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-md);
}

.trust-icon {
  width: 48px;
  height: 48px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, rgba(13,148,136,0.1), rgba(13,148,136,0.05));
  color: var(--ocean-teal);
}

.trust-icon svg {
  width: 24px;
  height: 24px;
}

.trust-text h4 {
  font-size: 0.9375rem;
  font-weight: 700;
  color: var(--deep-navy);
  margin-bottom: 2px;
}

.trust-text p {
  font-size: 0.8125rem;
  color: var(--gray-500);
  line-height: 1.4;
}

@media (max-width: 768px) {
  .trust-items { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 480px) {
  .trust-items { grid-template-columns: 1fr; }
}

/* --- App Cards --- */
.apps-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-2xl);
}

.app-card {
  background: var(--white);
  border-radius: var(--radius-2xl);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  transition: all var(--transition-slow);
  border: 1px solid var(--gray-100);
}

.app-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-xl);
}

.app-card-visual {
  height: 240px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.app-card-visual.clock-master {
  background: linear-gradient(135deg, #8B5CF6, #EC4899, #F59E0B);
}

.app-card-visual.math-tank {
  background: linear-gradient(135deg, #F9A8D4, #C4B5FD, #93C5FD);
}

.app-card-icon {
  font-size: 5rem;
  filter: drop-shadow(0 8px 20px rgba(0,0,0,0.2));
}

.app-card-body {
  padding: var(--space-2xl);
}

.app-card-age {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  background: rgba(13,148,136,0.1);
  color: var(--ocean-teal);
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 700;
  margin-bottom: var(--space-md);
}

.app-card h3 {
  font-size: 1.5rem;
  color: var(--deep-navy);
  margin-bottom: var(--space-sm);
}

.app-card-tagline {
  font-size: 0.875rem;
  color: var(--ocean-teal);
  font-weight: 600;
  margin-bottom: var(--space-md);
}

.app-card p {
  font-size: 0.9375rem;
  color: var(--gray-500);
  margin-bottom: var(--space-lg);
  line-height: 1.7;
}

.app-features {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  margin-bottom: var(--space-xl);
}

.app-feature-tag {
  padding: 0.375rem 0.875rem;
  background: var(--gray-50);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-full);
  font-size: 0.8125rem;
  color: var(--gray-600);
  font-weight: 500;
}

.app-card-actions {
  display: flex;
  gap: var(--space-md);
  align-items: center;
}

@media (max-width: 768px) {
  .apps-grid { grid-template-columns: 1fr; }
}

/* --- Why Section / Feature Cards --- */
.why-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-xl);
}

.why-card {
  background: var(--white);
  border-radius: var(--radius-xl);
  padding: var(--space-2xl);
  text-align: center;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--gray-100);
  transition: all var(--transition-base);
}

.why-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.why-icon {
  width: 72px;
  height: 72px;
  border-radius: var(--radius-xl);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--space-lg);
  font-size: 2rem;
}

.why-icon.safe {
  background: linear-gradient(135deg, rgba(13,148,136,0.15), rgba(13,148,136,0.05));
}
.why-icon.fun {
  background: linear-gradient(135deg, rgba(245,158,11,0.15), rgba(245,158,11,0.05));
}
.why-icon.effective {
  background: linear-gradient(135deg, rgba(167,139,250,0.15), rgba(167,139,250,0.05));
}

.why-card h3 {
  font-size: 1.25rem;
  color: var(--deep-navy);
  margin-bottom: var(--space-sm);
}

.why-card p {
  font-size: 0.9375rem;
  color: var(--gray-500);
  line-height: 1.7;
}

@media (max-width: 768px) {
  .why-grid { grid-template-columns: 1fr; }
}

/* --- Tools Preview --- */
.tools-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-lg);
}

.tool-card {
  background: var(--white);
  border-radius: var(--radius-xl);
  padding: var(--space-xl);
  text-align: center;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--gray-100);
  transition: all var(--transition-base);
  text-decoration: none;
  display: block;
}

.tool-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--ocean-teal-light);
}

.tool-emoji {
  font-size: 2.5rem;
  margin-bottom: var(--space-md);
  display: block;
}

.tool-card h3 {
  font-size: 1rem;
  color: var(--deep-navy);
  margin-bottom: var(--space-xs);
}

.tool-card p {
  font-size: 0.8125rem;
  color: var(--gray-500);
}

.tool-card .tool-cta {
  display: inline-block;
  margin-top: var(--space-md);
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--ocean-teal);
}

@media (max-width: 768px) {
  .tools-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 480px) {
  .tools-grid { grid-template-columns: 1fr; }
}

/* --- Blog Preview --- */
.blog-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-xl);
}

.blog-card {
  background: var(--white);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--gray-100);
  transition: all var(--transition-base);
  text-decoration: none;
  display: block;
}

.blog-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.blog-card-img {
  height: 180px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3rem;
}

.blog-card-img.story { background: linear-gradient(135deg, #FDE68A, #FCA5A5); }
.blog-card-img.math { background: linear-gradient(135deg, #A7F3D0, #93C5FD); }
.blog-card-img.screen { background: linear-gradient(135deg, #C4B5FD, #FBCFE8); }

.blog-card-body {
  padding: var(--space-xl);
}

.blog-card-category {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--ocean-teal);
  margin-bottom: var(--space-sm);
}

.blog-card h3 {
  font-size: 1.125rem;
  color: var(--deep-navy);
  margin-bottom: var(--space-sm);
  line-height: 1.4;
}

.blog-card p {
  font-size: 0.875rem;
  color: var(--gray-500);
  line-height: 1.6;
}

.blog-card-meta {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  margin-top: var(--space-md);
  padding-top: var(--space-md);
  border-top: 1px solid var(--gray-100);
  font-size: 0.8125rem;
  color: var(--gray-400);
}

@media (max-width: 768px) {
  .blog-grid { grid-template-columns: 1fr; }
}

/* --- Mom Story Section --- */
.story-section {
  background: linear-gradient(135deg, var(--ocean-teal-dark), var(--ocean-teal));
  color: var(--white);
  border-radius: var(--radius-2xl);
  padding: var(--space-3xl);
  margin: 0 var(--space-lg);
  position: relative;
  overflow: hidden;
}

.story-section::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(255,255,255,0.08), transparent 60%);
  border-radius: 50%;
}

.story-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3xl);
  align-items: center;
  position: relative;
  z-index: 2;
}

.story-content h2 {
  font-size: clamp(1.5rem, 3.5vw, 2.25rem);
  color: var(--white);
  margin-bottom: var(--space-lg);
}

.story-content p {
  font-size: 1.0625rem;
  line-height: 1.8;
  opacity: 0.92;
  margin-bottom: var(--space-lg);
}

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

.story-otter {
  width: 280px;
  height: 280px;
  animation: otterFloat 5s ease-in-out infinite;
  filter: drop-shadow(0 15px 30px rgba(0,0,0,0.2));
}

@media (max-width: 768px) {
  .story-section { margin: 0; border-radius: 0; }
  .story-inner { grid-template-columns: 1fr; text-align: center; }
  .story-otter { width: 200px; height: 200px; }
}

/* --- CTA Section --- */
.cta-section {
  text-align: center;
  padding: var(--space-4xl) 0;
  background:
    radial-gradient(ellipse at 50% 100%, rgba(13,148,136,0.06) 0%, transparent 60%);
}

.cta-section h2 {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  margin-bottom: var(--space-md);
}

.cta-section p {
  font-size: 1.125rem;
  color: var(--gray-500);
  margin-bottom: var(--space-2xl);
  max-width: 500px;
  margin-left: auto;
  margin-right: auto;
}

.cta-actions {
  display: flex;
  justify-content: center;
  gap: var(--space-md);
  flex-wrap: wrap;
}

/* --- Footer --- */
.footer {
  background: var(--deep-navy);
  color: rgba(255,255,255,0.7);
  padding: var(--space-3xl) 0 var(--space-xl);
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 1.5rem;
  flex-wrap: wrap;
  margin-bottom: 1rem;
  padding: 0 1.5rem;
}
.footer-links a {
  color: #8888a0;
  font-size: 0.9rem;
}
.footer-links a:hover {
  color: var(--primary, #c4b5fd);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-2xl);
  margin-bottom: var(--space-2xl);
}

.footer-brand p {
  font-size: 0.9375rem;
  line-height: 1.7;
  margin-top: var(--space-md);
  max-width: 300px;
}

.footer-brand .nav-brand {
  color: var(--white);
}

.footer h4 {
  color: var(--white);
  font-size: 0.875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-lg);
}

.footer ul li {
  margin-bottom: var(--space-sm);
}

.footer ul a {
  font-size: 0.9375rem;
  transition: color var(--transition-fast);
}

.footer ul a:hover {
  color: var(--ocean-teal-light);
}

.footer-bottom {
  padding-top: var(--space-xl);
  border-top: 1px solid rgba(255,255,255,0.1);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.8125rem;
}

.footer-bottom a {
  color: var(--ocean-teal-light);
}

@media (max-width: 768px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-bottom { flex-direction: column; gap: var(--space-sm); text-align: center; }
}
@media (max-width: 480px) {
  .footer-grid { grid-template-columns: 1fr; }
}

/* --- App Detail Page --- */
.app-hero {
  padding-top: calc(var(--nav-height) + var(--space-3xl));
  padding-bottom: var(--space-3xl);
  position: relative;
  overflow: hidden;
}

.app-hero.clock-master-bg {
  background: linear-gradient(135deg, rgba(139,92,246,0.08), rgba(236,72,153,0.06), rgba(245,158,11,0.04));
}

.app-hero.math-tank-bg {
  background: linear-gradient(135deg, rgba(249,168,212,0.08), rgba(196,181,253,0.06), rgba(147,197,253,0.04));
}

.app-hero-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3xl);
  align-items: center;
}

.app-hero-icon {
  font-size: 4rem;
  margin-bottom: var(--space-lg);
}

.app-hero h1 {
  font-size: clamp(2rem, 5vw, 3rem);
  margin-bottom: var(--space-md);
}

.app-hero .app-card-tagline {
  font-size: 1.125rem;
  margin-bottom: var(--space-lg);
}

.app-hero p {
  font-size: 1.0625rem;
  color: var(--gray-500);
  line-height: 1.7;
  margin-bottom: var(--space-xl);
}

.app-meta {
  display: flex;
  gap: var(--space-xl);
  margin-bottom: var(--space-xl);
}

.app-meta-item {
  text-align: center;
}

.app-meta-value {
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 1.25rem;
  color: var(--ocean-teal);
}

.app-meta-label {
  font-size: 0.75rem;
  color: var(--gray-400);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.app-hero-mockup {
  display: flex;
  justify-content: center;
  align-items: center;
}

.phone-mockup {
  width: 280px;
  height: 560px;
  background: var(--deep-navy);
  border-radius: 36px;
  padding: 12px;
  box-shadow: var(--shadow-xl), 0 0 0 2px rgba(255,255,255,0.1);
}

.phone-screen {
  width: 100%;
  height: 100%;
  border-radius: 26px;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 5rem;
}

.phone-screen.clock-master-screen {
  background: linear-gradient(135deg, #8B5CF6, #EC4899, #F59E0B);
}
.phone-screen.math-tank-screen {
  background: linear-gradient(135deg, #F9A8D4, #C4B5FD, #93C5FD);
}

@media (max-width: 768px) {
  .app-hero-inner { grid-template-columns: 1fr; text-align: center; }
  .app-meta { justify-content: center; }
  .phone-mockup { width: 220px; height: 440px; }
}

/* Feature detail sections */
.feature-section {
  padding: var(--space-3xl) 0;
}

.feature-section:nth-child(even) {
  background: var(--white);
}

.feature-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3xl);
  align-items: center;
}

.feature-grid.reverse {
  direction: rtl;
}
.feature-grid.reverse > * {
  direction: ltr;
}

.feature-visual {
  background: var(--gray-50);
  border-radius: var(--radius-xl);
  padding: var(--space-2xl);
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 300px;
  font-size: 6rem;
}

.feature-content h3 {
  font-size: 1.5rem;
  margin-bottom: var(--space-md);
}

.feature-content p {
  color: var(--gray-500);
  line-height: 1.7;
  margin-bottom: var(--space-lg);
}

.feature-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.feature-list li {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: 0.9375rem;
  color: var(--gray-600);
}

.feature-list li::before {
  content: '✓';
  display: flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  background: rgba(13,148,136,0.1);
  color: var(--ocean-teal);
  border-radius: 50%;
  font-size: 0.75rem;
  font-weight: 700;
  flex-shrink: 0;
}

@media (max-width: 768px) {
  .feature-grid { grid-template-columns: 1fr; }
  .feature-grid.reverse { direction: ltr; }
}

/* --- Tools Page --- */
.tool-page-hero {
  padding-top: calc(var(--nav-height) + var(--space-2xl));
  padding-bottom: var(--space-2xl);
  text-align: center;
  background: linear-gradient(135deg, rgba(13,148,136,0.06), rgba(245,158,11,0.04));
}

.tool-interactive {
  background: var(--white);
  border-radius: var(--radius-2xl);
  padding: var(--space-2xl);
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--gray-100);
  max-width: 900px;
  margin: 0 auto;
}

.tool-controls {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  justify-content: center;
  margin-bottom: var(--space-xl);
}

.tool-btn {
  padding: 0.5rem 1rem;
  border-radius: var(--radius-full);
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 0.875rem;
  background: var(--gray-50);
  color: var(--gray-600);
  border: 2px solid var(--gray-200);
  transition: all var(--transition-fast);
}

.tool-btn:hover, .tool-btn.active {
  background: var(--ocean-teal);
  color: var(--white);
  border-color: var(--ocean-teal);
}

/* Multiplication Table */
.times-table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--font-heading);
}

.times-table th, .times-table td {
  padding: 0.625rem;
  text-align: center;
  border: 1px solid var(--gray-200);
  font-size: 0.9375rem;
  transition: all var(--transition-fast);
}

.times-table th {
  background: var(--ocean-teal);
  color: var(--white);
  font-weight: 700;
}

.times-table td:hover {
  background: var(--warm-amber-light);
  transform: scale(1.05);
  font-weight: 700;
}

.times-table .highlight {
  background: rgba(13,148,136,0.1);
  font-weight: 700;
  color: var(--ocean-teal);
}

/* Math Quiz */
.quiz-area {
  text-align: center;
  padding: var(--space-xl);
}

.quiz-question {
  font-family: var(--font-heading);
  font-size: 3rem;
  font-weight: 900;
  color: var(--deep-navy);
  margin-bottom: var(--space-xl);
  min-height: 60px;
}

.quiz-options {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-md);
  max-width: 400px;
  margin: 0 auto var(--space-xl);
}

.quiz-option {
  padding: var(--space-lg);
  background: var(--gray-50);
  border: 2px solid var(--gray-200);
  border-radius: var(--radius-lg);
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.5rem;
  color: var(--deep-navy);
  transition: all var(--transition-fast);
}

.quiz-option:hover {
  border-color: var(--ocean-teal);
  background: rgba(13,148,136,0.05);
  transform: scale(1.05);
}

.quiz-option.correct {
  background: #D1FAE5;
  border-color: #10B981;
  color: #065F46;
}

.quiz-option.wrong {
  background: #FEE2E2;
  border-color: #EF4444;
  color: #991B1B;
}

.quiz-score {
  display: flex;
  justify-content: center;
  gap: var(--space-2xl);
  margin-bottom: var(--space-xl);
}

.quiz-score-item {
  text-align: center;
}

.quiz-score-value {
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: 2rem;
  color: var(--ocean-teal);
}

.quiz-score-label {
  font-size: 0.8125rem;
  color: var(--gray-400);
  text-transform: uppercase;
}

.quiz-timer {
  width: 100%;
  height: 6px;
  background: var(--gray-200);
  border-radius: 3px;
  overflow: hidden;
  margin-bottom: var(--space-lg);
}

.quiz-timer-bar {
  height: 100%;
  background: linear-gradient(90deg, var(--ocean-teal), var(--warm-amber));
  border-radius: 3px;
  transition: width 0.1s linear;
}

/* Spelling Bee */
.spelling-word {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  color: var(--deep-navy);
  margin-bottom: var(--space-lg);
  min-height: 40px;
}

.spelling-input {
  width: 100%;
  max-width: 400px;
  padding: var(--space-md) var(--space-lg);
  border: 2px solid var(--gray-200);
  border-radius: var(--radius-lg);
  font-family: var(--font-heading);
  font-size: 1.25rem;
  text-align: center;
  outline: none;
  transition: border-color var(--transition-fast);
}

.spelling-input:focus {
  border-color: var(--ocean-teal);
}

.spelling-input.correct {
  border-color: #10B981;
  background: #D1FAE5;
}

.spelling-input.wrong {
  border-color: #EF4444;
  background: #FEE2E2;
}

.spelling-hint {
  font-size: 0.875rem;
  color: var(--gray-400);
  margin-top: var(--space-md);
  min-height: 24px;
}

/* Calculator */
.calc-display {
  width: 100%;
  padding: var(--space-lg);
  background: var(--deep-navy);
  color: var(--white);
  font-family: var(--font-heading);
  font-size: 2.5rem;
  font-weight: 700;
  text-align: right;
  border-radius: var(--radius-lg);
  margin-bottom: var(--space-md);
  min-height: 80px;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  overflow: hidden;
}

.calc-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-sm);
}

.calc-btn {
  padding: var(--space-lg);
  border-radius: var(--radius-md);
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.25rem;
  transition: all var(--transition-fast);
  border: 1px solid var(--gray-200);
}

.calc-btn.number {
  background: var(--white);
  color: var(--deep-navy);
}

.calc-btn.number:hover {
  background: var(--gray-50);
  transform: scale(1.05);
}

.calc-btn.operator {
  background: var(--ocean-teal);
  color: var(--white);
}

.calc-btn.operator:hover {
  background: var(--ocean-teal-dark);
}

.calc-btn.equals {
  background: var(--warm-amber);
  color: var(--deep-navy);
  grid-column: span 2;
}

.calc-btn.equals:hover {
  background: var(--warm-amber-light);
}

.calc-btn.clear {
  background: var(--coral-pink);
  color: var(--white);
}

.calc-btn.clear:hover {
  background: var(--coral-pink-dark);
}

/* --- Blog Page --- */
.blog-hero {
  padding-top: calc(var(--nav-height) + var(--space-2xl));
  padding-bottom: var(--space-2xl);
  text-align: center;
  background: linear-gradient(135deg, rgba(167,139,250,0.06), rgba(251,113,133,0.04));
}

.blog-listing {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-xl);
}

@media (max-width: 768px) {
  .blog-listing { grid-template-columns: 1fr; }
}

/* Blog Post Page */
.post-hero {
  padding-top: calc(var(--nav-height) + var(--space-2xl));
  padding-bottom: var(--space-xl);
}

.post-meta {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
  font-size: 0.875rem;
  color: var(--gray-400);
}

.post-category {
  padding: 0.25rem 0.75rem;
  background: rgba(13,148,136,0.1);
  color: var(--ocean-teal);
  border-radius: var(--radius-full);
  font-weight: 700;
  font-size: 0.75rem;
  text-transform: uppercase;
}

.post-title {
  font-size: clamp(1.75rem, 4vw, 2.75rem);
  margin-bottom: var(--space-lg);
  max-width: 800px;
}

.post-content {
  max-width: 720px;
  margin: 0 auto;
  padding: var(--space-3xl) 0;
}

.post-content h2 {
  font-size: 1.5rem;
  margin-top: var(--space-2xl);
  margin-bottom: var(--space-md);
}

.post-content h3 {
  font-size: 1.25rem;
  margin-top: var(--space-xl);
  margin-bottom: var(--space-md);
}

.post-content p {
  font-size: 1.0625rem;
  line-height: 1.8;
  color: var(--gray-600);
  margin-bottom: var(--space-lg);
}

.post-content ul, .post-content ol {
  margin-bottom: var(--space-lg);
  padding-left: var(--space-xl);
}

.post-content li {
  font-size: 1.0625rem;
  line-height: 1.8;
  color: var(--gray-600);
  margin-bottom: var(--space-sm);
  list-style: disc;
}

.post-content ol li {
  list-style: decimal;
}

.post-content blockquote {
  border-left: 4px solid var(--ocean-teal);
  padding: var(--space-lg) var(--space-xl);
  background: rgba(13,148,136,0.05);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  margin-bottom: var(--space-lg);
  font-style: italic;
  color: var(--gray-600);
}

.post-content .callout {
  background: linear-gradient(135deg, rgba(13,148,136,0.08), rgba(167,139,250,0.05));
  border: 1px solid rgba(13,148,136,0.15);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  margin-bottom: var(--space-lg);
}

.post-content .callout h4 {
  font-size: 1rem;
  color: var(--ocean-teal);
  margin-bottom: var(--space-sm);
}

.post-cta {
  background: var(--gray-50);
  border-radius: var(--radius-xl);
  padding: var(--space-2xl);
  text-align: center;
  margin-top: var(--space-2xl);
  border: 1px solid var(--gray-200);
}

.post-cta h3 {
  margin-bottom: var(--space-sm);
}

.post-cta p {
  color: var(--gray-500);
  margin-bottom: var(--space-lg);
}

/* --- About Page --- */
.about-hero {
  padding-top: calc(var(--nav-height) + var(--space-3xl));
  padding-bottom: var(--space-3xl);
  text-align: center;
  background: linear-gradient(135deg, rgba(13,148,136,0.06), rgba(245,158,11,0.04));
}

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

.about-story {
  padding: var(--space-3xl) 0;
  max-width: 720px;
  margin: 0 auto;
}

.about-story p {
  font-size: 1.125rem;
  line-height: 1.9;
  color: var(--gray-600);
  margin-bottom: var(--space-lg);
}

.about-story p:first-of-type::first-letter {
  font-size: 3.5rem;
  font-family: var(--font-heading);
  font-weight: 900;
  color: var(--ocean-teal);
  float: left;
  margin-right: var(--space-sm);
  line-height: 1;
}

.values-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-xl);
  max-width: 800px;
  margin: 0 auto;
}

.value-card {
  background: var(--white);
  border-radius: var(--radius-xl);
  padding: var(--space-xl);
  box-shadow: var(--shadow-md);
  border: 1px solid var(--gray-100);
}

.value-card h3 {
  font-size: 1.125rem;
  margin-bottom: var(--space-sm);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.value-card p {
  font-size: 0.9375rem;
  color: var(--gray-500);
  line-height: 1.7;
}

@media (max-width: 768px) {
  .values-grid { grid-template-columns: 1fr; }
}

/* --- 404 Page --- */
.page-404 {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--space-2xl);
}

.page-404 h1 {
  font-size: 8rem;
  color: var(--ocean-teal);
  line-height: 1;
  margin-bottom: var(--space-md);
}

.page-404 h2 {
  font-size: 1.5rem;
  margin-bottom: var(--space-md);
}

.page-404 p {
  color: var(--gray-500);
  margin-bottom: var(--space-xl);
}

/* --- Privacy Page --- */
.legal-page {
  padding-top: calc(var(--nav-height) + var(--space-2xl));
  padding-bottom: var(--space-3xl);
  max-width: 720px;
  margin: 0 auto;
}

.legal-page h1 {
  font-size: 2rem;
  margin-bottom: var(--space-lg);
}

.legal-page h2 {
  font-size: 1.5rem;
  margin-top: var(--space-2xl);
  margin-bottom: var(--space-md);
}

.legal-page p, .legal-page li {
  font-size: 1rem;
  line-height: 1.8;
  color: var(--gray-600);
  margin-bottom: var(--space-md);
}

.legal-page ul {
  padding-left: var(--space-xl);
  margin-bottom: var(--space-md);
}

.legal-page li {
  list-style: disc;
  margin-bottom: var(--space-sm);
}

/* --- Animations --- */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Stagger children */
.stagger > * {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.stagger.visible > *:nth-child(1) { transition-delay: 0.1s; }
.stagger.visible > *:nth-child(2) { transition-delay: 0.2s; }
.stagger.visible > *:nth-child(3) { transition-delay: 0.3s; }
.stagger.visible > *:nth-child(4) { transition-delay: 0.4s; }

.stagger.visible > * {
  opacity: 1;
  transform: translateY(0);
}

/* Pulsing glow */
@keyframes pulseGlow {
  0%, 100% { box-shadow: 0 0 20px rgba(13,148,136,0.2); }
  50% { box-shadow: 0 0 40px rgba(13,148,136,0.4); }
}

/* Wave decoration */
.wave-divider {
  width: 100%;
  overflow: hidden;
  line-height: 0;
}

.wave-divider svg {
  display: block;
  width: 100%;
  height: 60px;
}

/* Tool app promo */
.tool-promo {
  background: linear-gradient(135deg, rgba(13,148,136,0.05), rgba(167,139,250,0.05));
  border: 1px solid rgba(13,148,136,0.1);
  border-radius: var(--radius-xl);
  padding: var(--space-xl);
  text-align: center;
  margin-top: var(--space-2xl);
}

.tool-promo h3 {
  font-size: 1.125rem;
  margin-bottom: var(--space-sm);
}

.tool-promo p {
  font-size: 0.9375rem;
  color: var(--gray-500);
  margin-bottom: var(--space-lg);
}

/* Breadcrumbs */
.breadcrumbs {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: 0.8125rem;
  color: var(--gray-400);
  margin-bottom: var(--space-lg);
}

.breadcrumbs a {
  color: var(--ocean-teal);
}

.breadcrumbs span {
  color: var(--gray-300);
}

/* --- App Download Badge --- */
.store-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 0.75rem 1.5rem;
  background: var(--deep-navy);
  color: var(--white);
  border-radius: var(--radius-md);
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 0.875rem;
  transition: all var(--transition-base);
}

.store-badge:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.store-badge svg {
  width: 20px;
  height: 20px;
}

/* Print styles */
@media print {
  .nav, .footer, .tool-promo, .cta-section { display: none; }
  body { background: white; color: black; }
}

/* ============================================================================
   MODERN VISUAL OVERHAUL — Animated, Playful, Alive
   ============================================================================ */

/* --- Animated Gradient Background --- */
body {
  background: #FEFCF8;
  background-image:
    radial-gradient(at 0% 0%, rgba(13,148,136,0.07) 0%, transparent 50%),
    radial-gradient(at 100% 0%, rgba(167,139,250,0.07) 0%, transparent 50%),
    radial-gradient(at 50% 100%, rgba(251,113,133,0.05) 0%, transparent 50%);
}

/* --- Nav Upgrade — Glassmorphism --- */
.nav {
  background: rgba(255,252,248,0.7);
  backdrop-filter: blur(24px) saturate(180%);
  -webkit-backdrop-filter: blur(24px) saturate(180%);
  border-bottom: 1px solid rgba(13,148,136,0.08);
}

.nav.scrolled {
  background: rgba(255,252,248,0.92);
  box-shadow: 0 4px 30px rgba(0,0,0,0.06);
}

.nav-brand {
  font-size: 1.5rem;
  letter-spacing: -0.02em;
}

.nav-cta {
  background: linear-gradient(135deg, #0D9488, #14B8A6, #0D9488);
  background-size: 200% 200%;
  animation: shimmer 3s ease infinite;
  box-shadow: 0 4px 15px rgba(13,148,136,0.3);
}

@keyframes shimmer {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

/* --- Hero Overhaul — Big, Bold, Animated --- */
.hero {
  padding-top: calc(var(--nav-height) + 5rem);
  padding-bottom: 5rem;
  background:
    radial-gradient(ellipse at 20% 50%, rgba(13,148,136,0.12) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 20%, rgba(167,139,250,0.1) 0%, transparent 50%),
    radial-gradient(ellipse at 60% 80%, rgba(251,113,133,0.08) 0%, transparent 50%),
    radial-gradient(ellipse at 40% 30%, rgba(245,158,11,0.06) 0%, transparent 40%);
  position: relative;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.65' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)' opacity='0.03'/%3E%3C/svg%3E");
  pointer-events: none;
  z-index: 1;
}

.hero .container { position: relative; z-index: 2; }

.hero-badge {
  background: linear-gradient(135deg, rgba(13,148,136,0.1), rgba(167,139,250,0.1));
  border: 1px solid rgba(13,148,136,0.15);
  backdrop-filter: blur(10px);
  animation: fadeInUp 0.6s ease both;
}

.hero-title {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  letter-spacing: -0.03em;
  line-height: 1.05;
  margin-bottom: var(--space-xl);
}

.text-gradient {
  background: linear-gradient(135deg, #0D9488 0%, #A78BFA 50%, #FB7185 100%);
  background-size: 200% auto;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: gradientFlow 4s ease infinite;
}

@keyframes gradientFlow {
  0% { background-position: 0% center; }
  50% { background-position: 100% center; }
  100% { background-position: 0% center; }
}

.hero-subtitle {
  font-size: 1.25rem;
  max-width: 540px;
  color: var(--gray-500);
  line-height: 1.8;
}

/* --- Buttons — Juicy, Bouncy --- */
.btn {
  border-radius: var(--radius-lg);
  font-weight: 800;
  letter-spacing: -0.01em;
  transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.btn:active {
  transform: translateY(0) scale(0.97);
}

.btn-primary {
  background: linear-gradient(135deg, #0D9488, #14B8A6);
  box-shadow: 0 4px 15px rgba(13,148,136,0.35), inset 0 1px 0 rgba(255,255,255,0.2);
}

.btn-primary:hover {
  transform: translateY(-3px) scale(1.02);
  box-shadow: 0 8px 30px rgba(13,148,136,0.4), inset 0 1px 0 rgba(255,255,255,0.2);
}

.btn-secondary {
  background: rgba(255,255,255,0.8);
  backdrop-filter: blur(10px);
  border: 2px solid rgba(13,148,136,0.2);
}

.btn-secondary:hover {
  background: rgba(13,148,136,0.08);
  border-color: var(--ocean-teal);
  transform: translateY(-3px) scale(1.02);
}

.btn-coral {
  background: linear-gradient(135deg, #FB7185, #F43F5E);
  box-shadow: 0 4px 15px rgba(251,113,133,0.35), inset 0 1px 0 rgba(255,255,255,0.2);
}

/* --- Trust Bar — Glass Cards --- */
.trust-bar {
  background: rgba(255,255,255,0.5);
  backdrop-filter: blur(20px);
  border-top: 1px solid rgba(13,148,136,0.06);
  border-bottom: 1px solid rgba(13,148,136,0.06);
}

.trust-icon {
  background: linear-gradient(135deg, rgba(13,148,136,0.12), rgba(14,184,166,0.05));
  border-radius: var(--radius-xl);
  transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.trust-item:hover .trust-icon {
  transform: scale(1.1) rotate(-5deg);
}

/* --- App Cards — Glassmorphism + Depth --- */
.app-card {
  background: rgba(255,255,255,0.7);
  backdrop-filter: blur(20px);
  border: 1px solid rgba(255,255,255,0.5);
  border-radius: var(--radius-2xl);
  box-shadow:
    0 4px 6px -1px rgba(0,0,0,0.04),
    0 20px 40px -8px rgba(0,0,0,0.06);
  transition: all 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.app-card:hover {
  transform: translateY(-8px) scale(1.01);
  box-shadow:
    0 8px 12px -2px rgba(0,0,0,0.06),
    0 30px 60px -12px rgba(0,0,0,0.1);
}

.app-card-visual {
  height: 260px;
  position: relative;
  overflow: hidden;
}

.app-card-visual::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 60px;
  background: linear-gradient(transparent, rgba(255,255,255,0.7));
}

.app-card-icon {
  font-size: 5.5rem;
  filter: drop-shadow(0 10px 25px rgba(0,0,0,0.15));
  animation: iconBounce 3s ease-in-out infinite;
}

@keyframes iconBounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

.app-card-visual.clock-master {
  background: linear-gradient(135deg, #8B5CF6, #A78BFA, #EC4899, #F59E0B);
  background-size: 300% 300%;
  animation: meshGradient 8s ease infinite;
}

.app-card-visual.math-tank {
  background: linear-gradient(135deg, #F9A8D4, #C4B5FD, #93C5FD, #A5F3FC);
  background-size: 300% 300%;
  animation: meshGradient 8s ease infinite;
  animation-delay: -4s;
}

@keyframes meshGradient {
  0% { background-position: 0% 50%; }
  33% { background-position: 100% 0%; }
  66% { background-position: 50% 100%; }
  100% { background-position: 0% 50%; }
}

.app-feature-tag {
  background: linear-gradient(135deg, rgba(13,148,136,0.06), rgba(167,139,250,0.06));
  border: 1px solid rgba(13,148,136,0.1);
  border-radius: var(--radius-md);
  transition: all 0.2s ease;
}

.app-feature-tag:hover {
  background: rgba(13,148,136,0.1);
  transform: translateY(-1px);
}

/* --- Why Cards — Hover Pop --- */
.why-card {
  background: rgba(255,255,255,0.7);
  backdrop-filter: blur(15px);
  border: 1px solid rgba(255,255,255,0.6);
  transition: all 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.why-card:hover {
  transform: translateY(-8px) scale(1.02);
  box-shadow: 0 20px 40px rgba(0,0,0,0.08);
}

.why-icon {
  transition: transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.why-card:hover .why-icon {
  transform: scale(1.15) rotate(-8deg);
}

/* --- Tool Cards — Colorful Hover --- */
.tool-card {
  background: rgba(255,255,255,0.7);
  backdrop-filter: blur(15px);
  border: 1px solid rgba(255,255,255,0.5);
  transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.tool-card:hover {
  transform: translateY(-6px) scale(1.03);
  box-shadow: 0 15px 30px rgba(13,148,136,0.12);
  border-color: rgba(13,148,136,0.3);
}

.tool-card:hover .tool-emoji {
  transform: scale(1.3) rotate(-10deg);
  transition: transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.tool-emoji {
  transition: transform 0.3s ease;
}

/* --- Blog Cards — Smooth life --- */
.blog-card {
  background: rgba(255,255,255,0.7);
  backdrop-filter: blur(15px);
  border: 1px solid rgba(255,255,255,0.5);
  transition: all 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.blog-card:hover {
  transform: translateY(-6px) scale(1.01);
  box-shadow: 0 20px 40px rgba(0,0,0,0.08);
}

.blog-card-img {
  height: 200px;
  font-size: 3.5rem;
  position: relative;
  overflow: hidden;
}

.blog-card-img.story {
  background: linear-gradient(135deg, #FDE68A, #FCA5A5, #FBBF24);
  background-size: 200% 200%;
  animation: meshGradient 6s ease infinite;
}

.blog-card-img.math {
  background: linear-gradient(135deg, #A7F3D0, #93C5FD, #6EE7B7);
  background-size: 200% 200%;
  animation: meshGradient 6s ease infinite;
  animation-delay: -2s;
}

.blog-card-img.screen {
  background: linear-gradient(135deg, #C4B5FD, #FBCFE8, #A78BFA);
  background-size: 200% 200%;
  animation: meshGradient 6s ease infinite;
  animation-delay: -4s;
}

/* --- Story Section — More Vibrant --- */
.story-section {
  background: linear-gradient(135deg, #0F766E, #0D9488, #14B8A6, #0D9488);
  background-size: 300% 300%;
  animation: meshGradient 10s ease infinite;
  border-radius: var(--radius-2xl);
  box-shadow: 0 25px 50px rgba(13,148,136,0.25);
}

/* --- CTA — Big Energy --- */
.cta-section {
  position: relative;
}

.cta-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 30% 50%, rgba(13,148,136,0.08) 0%, transparent 50%),
    radial-gradient(ellipse at 70% 50%, rgba(251,113,133,0.06) 0%, transparent 50%);
  pointer-events: none;
}

/* --- Section Headers — Bolder --- */
.section-badge {
  background: linear-gradient(135deg, rgba(13,148,136,0.08), rgba(167,139,250,0.08));
  border: 1px solid rgba(13,148,136,0.12);
  backdrop-filter: blur(10px);
  font-size: 0.875rem;
  padding: 0.5rem 1.25rem;
}

.section-title {
  font-size: clamp(2rem, 4.5vw, 3rem);
  letter-spacing: -0.03em;
}

/* --- Footer — Richer --- */
.footer {
  background: linear-gradient(180deg, #0F172A, #1E293B);
  position: relative;
}

.footer::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(13,148,136,0.3), rgba(167,139,250,0.3), transparent);
}

/* --- Tool Interactive Area — Modern --- */
.tool-interactive {
  background: rgba(255,255,255,0.7);
  backdrop-filter: blur(20px);
  border: 1px solid rgba(255,255,255,0.5);
  box-shadow: 0 8px 32px rgba(0,0,0,0.06);
}

/* --- Otter Mascot — More Lively --- */
.otter-mascot {
  width: 360px;
  height: 360px;
  animation: otterFloat 4s ease-in-out infinite;
  filter: drop-shadow(0 25px 50px rgba(13,148,136,0.25));
}

@keyframes otterFloat {
  0%, 100% { transform: translateY(0) rotate(-3deg); }
  25% { transform: translateY(-12px) rotate(0deg); }
  50% { transform: translateY(-20px) rotate(3deg); }
  75% { transform: translateY(-8px) rotate(0deg); }
}

/* --- Floating Bubbles — More Animated --- */
.bubble {
  animation: bubbleFloat 7s ease-in-out infinite;
}

@keyframes bubbleFloat {
  0% { transform: translateY(0) scale(1) rotate(0deg); opacity: 0.12; }
  25% { transform: translateY(-20px) scale(1.1) rotate(90deg); opacity: 0.2; }
  50% { transform: translateY(-35px) scale(0.9) rotate(180deg); opacity: 0.15; }
  75% { transform: translateY(-15px) scale(1.05) rotate(270deg); opacity: 0.22; }
  100% { transform: translateY(0) scale(1) rotate(360deg); opacity: 0.12; }
}

/* --- Scroll Animations — Smoother --- */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1), transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

.stagger > * {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s cubic-bezier(0.16, 1, 0.3, 1), transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.stagger.visible > *:nth-child(1) { transition-delay: 0.05s; }
.stagger.visible > *:nth-child(2) { transition-delay: 0.15s; }
.stagger.visible > *:nth-child(3) { transition-delay: 0.25s; }
.stagger.visible > *:nth-child(4) { transition-delay: 0.35s; }
.stagger.visible > *:nth-child(5) { transition-delay: 0.45s; }
.stagger.visible > *:nth-child(6) { transition-delay: 0.55s; }
.stagger.visible > *:nth-child(7) { transition-delay: 0.65s; }
.stagger.visible > *:nth-child(8) { transition-delay: 0.75s; }

.stagger.visible > * {
  opacity: 1;
  transform: translateY(0);
}

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

/* --- Mini-Game Embed --- */
.mini-game-wrapper {
  background: rgba(255,255,255,0.8);
  backdrop-filter: blur(20px);
  border-radius: var(--radius-2xl);
  border: 2px solid rgba(13,148,136,0.15);
  padding: var(--space-xl);
  box-shadow: 0 8px 32px rgba(0,0,0,0.08);
  margin-top: var(--space-2xl);
  overflow: hidden;
}

.mini-game-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-lg);
}

.mini-game-header h3 {
  font-size: 1.25rem;
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.mini-game-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 0.25rem 0.75rem;
  background: linear-gradient(135deg, rgba(245,158,11,0.1), rgba(251,113,133,0.1));
  border: 1px solid rgba(245,158,11,0.2);
  border-radius: var(--radius-full);
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 0.75rem;
  color: var(--warm-amber);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.mini-game-canvas {
  width: 100%;
  border-radius: var(--radius-lg);
  position: relative;
  overflow: hidden;
  user-select: none;
  -webkit-user-select: none;
}

/* --- Race Game Styles --- */
.race-road {
  width: 100%;
  height: 320px;
  background: linear-gradient(180deg, #4ADE80 0%, #4ADE80 15%, #6B7280 15%, #6B7280 85%, #4ADE80 85%);
  border-radius: var(--radius-lg);
  position: relative;
  overflow: hidden;
}

.race-road .lane-line {
  position: absolute;
  top: 50%;
  width: 100%;
  height: 4px;
  background: repeating-linear-gradient(90deg, #FFF 0, #FFF 30px, transparent 30px, transparent 60px);
  animation: roadScroll 0.6s linear infinite;
}

@keyframes roadScroll {
  from { transform: translateX(0); }
  to { transform: translateX(-60px); }
}

.race-car {
  position: absolute;
  font-size: 2.5rem;
  transition: top 0.2s ease;
  filter: drop-shadow(0 4px 8px rgba(0,0,0,0.3));
}

.race-question-box {
  position: absolute;
  top: 10px;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(0,0,0,0.75);
  backdrop-filter: blur(10px);
  color: white;
  padding: 0.5rem 1.5rem;
  border-radius: var(--radius-full);
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 1.25rem;
  z-index: 10;
  white-space: nowrap;
}

.race-options {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-sm);
  margin-top: var(--space-md);
}

.race-option {
  padding: 0.75rem;
  background: var(--white);
  border: 2px solid var(--gray-200);
  border-radius: var(--radius-md);
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 1.25rem;
  color: var(--deep-navy);
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.race-option:hover {
  border-color: var(--ocean-teal);
  background: rgba(13,148,136,0.05);
  transform: scale(1.05);
}

.race-option.correct {
  background: #D1FAE5;
  border-color: #10B981;
  color: #065F46;
  transform: scale(1.05);
}

.race-option.wrong {
  background: #FEE2E2;
  border-color: #EF4444;
  color: #991B1B;
}

/* --- Battle Game Styles --- */
.battle-arena {
  width: 100%;
  height: 280px;
  background: linear-gradient(135deg, #1E1B4B, #312E81, #4C1D95);
  border-radius: var(--radius-lg);
  position: relative;
  overflow: hidden;
}

.battle-arena .stars {
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(1px 1px at 10% 20%, #FFF 100%, transparent),
    radial-gradient(1px 1px at 30% 60%, #FFF 100%, transparent),
    radial-gradient(1px 1px at 50% 10%, #FFF 100%, transparent),
    radial-gradient(1px 1px at 70% 40%, #FFF 100%, transparent),
    radial-gradient(1px 1px at 90% 70%, #FFF 100%, transparent),
    radial-gradient(1px 1px at 20% 80%, #FFF 100%, transparent),
    radial-gradient(1px 1px at 60% 90%, #FFF 100%, transparent),
    radial-gradient(1px 1px at 80% 15%, #FFF 100%, transparent),
    radial-gradient(1px 1px at 40% 50%, #FFF 100%, transparent),
    radial-gradient(2px 2px at 15% 45%, #E0E7FF 100%, transparent),
    radial-gradient(2px 2px at 85% 25%, #E0E7FF 100%, transparent);
  animation: twinkle 3s ease-in-out infinite alternate;
}

@keyframes twinkle {
  from { opacity: 0.6; }
  to { opacity: 1; }
}

.battle-tank {
  position: absolute;
  font-size: 3rem;
  filter: drop-shadow(0 4px 12px rgba(0,0,0,0.4));
  transition: transform 0.3s ease;
}

.battle-tank.player {
  left: 15%;
  top: 50%;
  transform: translateY(-50%);
}

.battle-tank.enemy {
  right: 15%;
  top: 50%;
  transform: translateY(-50%) scaleX(-1);
}

.battle-missile {
  position: absolute;
  font-size: 1.5rem;
  animation: missilefly 0.6s ease-in forwards;
}

@keyframes missilefly {
  0% { opacity: 1; }
  100% { opacity: 0; }
}

.battle-hp {
  position: absolute;
  bottom: 12px;
  width: 80px;
  height: 8px;
  background: rgba(255,255,255,0.2);
  border-radius: 4px;
  overflow: hidden;
}

.battle-hp.player-hp { left: 10%; }
.battle-hp.enemy-hp { right: 10%; }

.battle-hp-fill {
  height: 100%;
  border-radius: 4px;
  transition: width 0.3s ease;
}

.battle-hp-fill.green { background: linear-gradient(90deg, #22C55E, #4ADE80); }
.battle-hp-fill.red { background: linear-gradient(90deg, #EF4444, #F87171); }

.battle-question {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(10px);
  padding: 0.75rem 2rem;
  border-radius: var(--radius-xl);
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: 1.75rem;
  color: var(--deep-navy);
  box-shadow: 0 8px 32px rgba(0,0,0,0.2);
  z-index: 10;
}

.battle-score {
  position: absolute;
  top: 10px;
  right: 12px;
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 0.875rem;
  color: rgba(255,255,255,0.8);
}

/* --- Phone Mockup — More Polished --- */
.phone-mockup {
  background: linear-gradient(135deg, #1E293B, #0F172A);
  box-shadow:
    0 25px 50px rgba(0,0,0,0.2),
    0 0 0 1px rgba(255,255,255,0.1),
    inset 0 1px 0 rgba(255,255,255,0.05);
}

/* --- Store Badge — More Prominent --- */
.store-badge {
  background: linear-gradient(135deg, #1E293B, #334155);
  box-shadow: 0 4px 15px rgba(0,0,0,0.15);
  font-size: 0.9375rem;
  padding: 0.875rem 1.75rem;
  transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.store-badge:hover {
  transform: translateY(-3px) scale(1.03);
  box-shadow: 0 8px 25px rgba(0,0,0,0.2);
}

/* --- Sections with Alt Background --- */
.section:nth-child(even),
section:nth-child(even) {
  position: relative;
}

/* --- Responsive Overrides --- */
@media (max-width: 768px) {
  .hero { padding-top: calc(var(--nav-height) + 3rem); padding-bottom: 3rem; }
  .hero-title { font-size: clamp(2rem, 8vw, 3rem); }
  .otter-mascot { width: 260px; height: 260px; }
  .race-road { height: 240px; }
  .race-options { grid-template-columns: repeat(2, 1fr); }
  .battle-arena { height: 220px; }
  .battle-tank { font-size: 2rem; }
  .battle-question { font-size: 1.25rem; padding: 0.5rem 1.25rem; }
}


/* ============================================================================
   HIGH-FIDELITY GAME DEMO STYLES
   Authentic recreation of Clock Master & Math Tank UI
   ============================================================================ */

/* --- Clock Master: Time Race --- */
.race-menu,
.battle-menu {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 1.5rem;
  text-align: center;
  min-height: 380px;
  background: linear-gradient(180deg, #FF9A56 0%, #FF6B35 100%);
}

.race-menu-header,
.battle-menu-header {
  margin-bottom: 1.25rem;
}

.race-menu-icon,
.battle-menu-icon {
  font-size: 3rem;
  margin-bottom: 0.5rem;
  animation: bounce 2s ease-in-out infinite;
}

@keyframes bounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

.race-menu h3,
.battle-menu h3 {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 800;
  color: white;
  margin-bottom: 0.25rem;
  text-shadow: 0 2px 8px rgba(0,0,0,0.2);
}

.race-menu p,
.battle-menu p {
  font-size: 0.875rem;
  color: rgba(255,255,255,0.85);
}

.race-menu-section,
.battle-menu-section {
  width: 100%;
  margin-bottom: 1rem;
}

.race-menu-label,
.battle-menu-label {
  font-family: var(--font-heading);
  font-size: 0.75rem;
  font-weight: 700;
  color: rgba(255,255,255,0.9);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 0.5rem;
}

.race-difficulty-grid,
.battle-difficulty-grid {
  display: flex;
  gap: 0.5rem;
  justify-content: center;
}

.race-diff-btn,
.battle-diff-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 0.5rem 1rem;
  border-radius: var(--radius-lg);
  background: rgba(255,255,255,0.2);
  backdrop-filter: blur(8px);
  border: 2px solid transparent;
  color: white;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.race-diff-btn:hover,
.battle-diff-btn:hover {
  background: rgba(255,255,255,0.3);
}

.race-diff-btn.active,
.battle-diff-btn.active {
  background: white;
  color: var(--deep-navy);
  border-color: var(--warm-amber);
  box-shadow: 0 4px 15px rgba(0,0,0,0.2);
}

.race-diff-name,
.battle-diff-name {
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 0.875rem;
}

.race-diff-desc,
.battle-diff-desc {
  font-size: 0.65rem;
  opacity: 0.7;
}

.race-car-preview,
.battle-tank-preview {
  width: 150px;
  height: 70px;
  margin: 0 auto 0.75rem;
}

.race-car-preview svg,
.battle-tank-preview svg {
  width: 100%;
  height: 100%;
}

.race-color-grid,
.battle-tank-grid {
  display: flex;
  gap: 0.5rem;
  justify-content: center;
}

.race-color-btn {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: 3px solid transparent;
  cursor: pointer;
  transition: all var(--transition-fast);
  box-shadow: 0 2px 8px rgba(0,0,0,0.2);
}

.race-color-btn:hover {
  transform: scale(1.1);
}

.race-color-btn.active {
  border-color: white;
  box-shadow: 0 0 0 3px rgba(255,255,255,0.5), 0 4px 12px rgba(0,0,0,0.3);
}

.battle-tank-btn {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background: rgba(255,255,255,0.2);
  border: 2px solid transparent;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.battle-tank-btn:hover {
  background: rgba(255,255,255,0.3);
}

.battle-tank-btn.active {
  background: white;
  border-color: var(--warm-amber);
}

.race-start-btn,
.battle-start-btn {
  padding: 0.875rem 2.5rem;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, #22C55E, #16A34A);
  color: white;
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 1.1rem;
  border: none;
  cursor: pointer;
  box-shadow: 0 6px 20px rgba(34, 197, 94, 0.4);
  transition: all var(--transition-base);
}

.race-start-btn:hover,
.battle-start-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(34, 197, 94, 0.5);
}

/* Countdown */
.race-countdown {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 380px;
  background: linear-gradient(180deg, #1E293B 0%, #0F172A 100%);
}

.race-countdown-num {
  font-family: var(--font-heading);
  font-size: 5rem;
  font-weight: 900;
  color: white;
  text-shadow: 0 0 40px rgba(255,255,255,0.5);
  animation: countPop 0.3s ease;
}

@keyframes countPop {
  0% { transform: scale(0.5); opacity: 0; }
  100% { transform: scale(1); opacity: 1; }
}

/* Race Track */
.race-track {
  position: relative;
  height: 200px;
  background: linear-gradient(180deg, #38BDF8 0%, #60A5FA 40%, #818CF8 100%);
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
  overflow: hidden;
}

.race-road {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 120px;
  background: #374151;
  overflow: hidden;
}

.race-lane {
  position: absolute;
  left: 0;
  right: 0;
  height: 50%;
  background: #4B5563;
}

.race-lane.lane-1 { top: 0; }
.race-lane.lane-2 { bottom: 0; }

.race-lane-divider {
  position: absolute;
  top: 50%;
  left: 0;
  right: 0;
  height: 3px;
  background: repeating-linear-gradient(90deg, #FFF 0, #FFF 30px, transparent 30px, transparent 60px);
  transform: translateY(-50%);
}

.race-finish {
  position: absolute;
  right: 5%;
  top: 5%;
  bottom: 5%;
  width: 6px;
  background: repeating-linear-gradient(180deg, #FFF 0, #FFF 10px, #000 10px, #000 20px);
  opacity: 0.7;
  border-radius: 2px;
}

.race-car {
  position: absolute;
  transition: left 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
  z-index: 10;
}

.race-car svg {
  width: 80px;
  height: 40px;
}

.race-car.player-car {
  bottom: 8px;
  transform: translateX(-50%);
}

.race-car.opponent-car {
  top: 8px;
  transform: translateX(-50%);
}

.race-car.opponent-car svg {
  width: 60px;
  height: 30px;
}

.race-hud {
  position: absolute;
  top: 10px;
  left: 15px;
  right: 15px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  z-index: 20;
}

.race-q-num,
.race-score {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 0.8rem;
  color: white;
  text-shadow: 0 2px 6px rgba(0,0,0,0.3);
  background: rgba(0,0,0,0.3);
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-full);
}

.race-score {
  color: #FBBF24;
}

.race-diff-badge {
  font-family: var(--font-heading);
  font-size: 0.65rem;
  font-weight: 700;
  background: rgba(255,255,255,0.2);
  color: white;
  padding: 0.2rem 0.5rem;
  border-radius: var(--radius-sm);
}

.race-timer-bar {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 6px;
  background: rgba(0,0,0,0.3);
}

.race-timer-fill {
  height: 100%;
  transition: width 0.1s linear;
}

/* Question Area */
.race-question-area,
.battle-question-area {
  padding: 1rem;
  background: linear-gradient(180deg, #FFF 0%, #F8FAFC 100%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
}

.race-clock-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
}

.race-clock-container svg {
  filter: drop-shadow(0 4px 12px rgba(0,0,0,0.15));
}

.race-clock-label {
  font-family: var(--font-heading);
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--gray-600);
}

.race-options-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.5rem;
  width: 100%;
  max-width: 320px;
}

.race-option {
  padding: 0.75rem;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, #6366F1, #8B5CF6);
  color: white;
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 1rem;
  border: none;
  cursor: pointer;
  box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
  transition: all var(--transition-fast);
}

.race-option:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(99, 102, 241, 0.4);
}

.race-option.correct {
  background: linear-gradient(135deg, #22C55E, #16A34A) !important;
  animation: correctPulse 0.5s ease;
}

.race-option.wrong {
  background: linear-gradient(135deg, #EF4444, #DC2626) !important;
  animation: shake 0.3s ease;
}

@keyframes correctPulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.05); }
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-4px); }
  75% { transform: translateX(4px); }
}

/* Result Screen */
.race-result,
.battle-result {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 2rem;
  min-height: 380px;
  text-align: center;
}

.race-result.won,
.battle-result.won {
  background: linear-gradient(180deg, #22C55E 0%, #16A34A 100%);
}

.race-result.lost,
.battle-result.lost {
  background: linear-gradient(180deg, #EF4444 0%, #DC2626 100%);
}

.race-result-icon,
.battle-result-icon {
  font-size: 4rem;
  margin-bottom: 1rem;
  animation: bounce 1s ease-in-out infinite;
}

.race-result h3,
.battle-result h3 {
  font-family: var(--font-heading);
  font-size: 2rem;
  font-weight: 900;
  color: white;
  margin-bottom: 0.5rem;
}

.race-result p,
.battle-result p {
  color: rgba(255,255,255,0.9);
  margin-bottom: 1.5rem;
}

.race-result-stats,
.battle-result-stats {
  display: flex;
  gap: 2rem;
  margin-bottom: 1.5rem;
}

.race-stat,
.battle-stat {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.race-stat-value,
.battle-stat-value {
  font-family: var(--font-heading);
  font-size: 2rem;
  font-weight: 900;
  color: white;
}

.race-stat-label,
.battle-stat-label {
  font-size: 0.75rem;
  color: rgba(255,255,255,0.8);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.race-result-cta,
.battle-result-cta {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  justify-content: center;
}

.race-play-again-btn,
.battle-play-again-btn {
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-full);
  background: white;
  color: var(--deep-navy);
  font-family: var(--font-heading);
  font-weight: 700;
  border: none;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.race-play-again-btn:hover,
.battle-play-again-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0,0,0,0.2);
}

.race-download-btn,
.battle-download-btn {
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-full);
  background: rgba(255,255,255,0.2);
  color: white;
  font-family: var(--font-heading);
  font-weight: 700;
  border: 2px solid rgba(255,255,255,0.5);
  transition: all var(--transition-fast);
}

.race-download-btn:hover,
.battle-download-btn:hover {
  background: rgba(255,255,255,0.3);
}

/* --- Math Tank: Battle --- */
.battle-menu {
  background: linear-gradient(180deg, #EC4899 0%, #BE185D 100%);
}

.battle-arena {
  position: relative;
  height: 180px;
  background: linear-gradient(180deg, #1E1B4B 0%, #312E81 100%);
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
  overflow: hidden;
}

.battle-hp-row {
  position: absolute;
  top: 10px;
  left: 10px;
  right: 10px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  z-index: 20;
}

.battle-hp-container {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.battle-hp-container.enemy {
  flex-direction: row-reverse;
}

.battle-hp-label {
  font-family: var(--font-heading);
  font-size: 0.7rem;
  font-weight: 700;
  color: white;
}

.battle-hp-bar {
  width: 80px;
  height: 10px;
  background: rgba(255,255,255,0.2);
  border-radius: 5px;
  overflow: hidden;
}

.battle-hp-row .battle-hp-fill {
  height: 100%;
  transition: width 0.3s ease;
  border-radius: 5px;
}

.battle-hp-value {
  font-family: var(--font-heading);
  font-size: 0.65rem;
  font-weight: 700;
  color: rgba(255,255,255,0.7);
}

.battle-phase-badge {
  padding: 0.4rem 1rem;
  border-radius: var(--radius-full);
  font-family: var(--font-heading);
  font-size: 0.8rem;
  font-weight: 800;
  color: white;
  text-shadow: 0 2px 6px rgba(0,0,0,0.3);
}

.battle-phase-badge.attack {
  background: linear-gradient(135deg, #3B82F6, #1D4ED8);
  box-shadow: 0 4px 15px rgba(59, 130, 246, 0.4);
}

.battle-phase-badge.defend {
  background: linear-gradient(135deg, #F59E0B, #D97706);
  box-shadow: 0 4px 15px rgba(245, 158, 11, 0.4);
}

.battle-field {
  position: absolute;
  bottom: 20px;
  left: 0;
  right: 0;
  height: 80px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 30px;
}

.battle-tank-container {
  width: 100px;
  height: 60px;
}

.battle-tank-container svg {
  width: 100%;
  height: 100%;
}

.battle-timer-bar {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 6px;
  background: rgba(0,0,0,0.3);
}

.battle-timer-fill {
  height: 100%;
  transition: width 0.1s linear;
}

.battle-table-badge {
  padding: 0.3rem 0.75rem;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, #FBBF24, #F59E0B);
  font-family: var(--font-heading);
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--deep-navy);
}

.battle-question-area .battle-question {
  font-family: var(--font-heading);
  font-size: 1.75rem;
  font-weight: 900;
  color: var(--deep-navy);
  position: static;
  transform: none;
  background: transparent;
  box-shadow: none;
  padding: 0;
}

.battle-visual {
  font-size: 1rem;
  letter-spacing: 2px;
  color: var(--gray-500);
}

.battle-answer {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100px;
  height: 50px;
  background: var(--gray-100);
  border: 3px solid var(--ocean-teal);
  border-radius: var(--radius-lg);
}

.battle-answer-display {
  font-family: var(--font-heading);
  font-size: 1.75rem;
  font-weight: 900;
  color: var(--deep-navy);
}

.battle-numpad {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.4rem;
  width: 100%;
  max-width: 200px;
}

.battle-numpad-btn {
  padding: 0.6rem;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, #E2E8F0, #CBD5E1);
  color: var(--deep-navy);
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 1.1rem;
  border: none;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.battle-numpad-btn:hover {
  background: linear-gradient(135deg, #CBD5E1, #94A3B8);
}

.battle-numpad-btn:active {
  transform: scale(0.95);
}

.battle-numpad-btn.action {
  background: linear-gradient(135deg, #F87171, #EF4444);
  color: white;
  font-size: 0.9rem;
}

.battle-submit-btn {
  padding: 0.75rem 2rem;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, #22C55E, #16A34A);
  color: white;
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 1rem;
  border: none;
  cursor: pointer;
  box-shadow: 0 4px 15px rgba(34, 197, 94, 0.4);
  transition: all var(--transition-fast);
}

.battle-submit-btn:disabled {
  background: linear-gradient(135deg, #94A3B8, #64748B);
  box-shadow: none;
  cursor: not-allowed;
}

.battle-submit-btn:not(:disabled):hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(34, 197, 94, 0.5);
}

/* Responsive adjustments for game demos */
@media (max-width: 480px) {
  .race-options-grid {
    grid-template-columns: repeat(2, 1fr);
    max-width: 240px;
  }
  
  .race-clock-container svg {
    width: 100px;
    height: 100px;
  }
  
  .battle-numpad {
    max-width: 180px;
  }
  
  .race-car svg {
    width: 60px;
    height: 30px;
  }
}