/* CSS Design System for Kittylingo English Web Pages */
@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700;800&family=Plus+Jakarta+Sans:wght@300;400;500;600;700;800&display=swap');

:root {
  --font-heading: 'Outfit', sans-serif;
  --font-body: 'Plus Jakarta Sans', sans-serif;

  /* Colors */
  --bg-main: #080b11;
  --bg-card: rgba(17, 24, 39, 0.7);
  --bg-nav: rgba(8, 11, 17, 0.8);
  --border-color: rgba(255, 255, 255, 0.08);
  
  --primary-glow: linear-gradient(135deg, #6366f1 0%, #a855f7 50%, #ec4899 100%);
  --text-main: #f3f4f6;
  --text-muted: #9ca3af;
  
  --color-primary: #818cf8;
  --color-secondary: #c084fc;
  --color-accent: #f472b6;
  --color-success: #34d399;
  --color-warning: #fbbf24;
  --color-danger: #f87171;
  
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-glow: 0 0 25px rgba(99, 102, 241, 0.15);
  
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-body);
  background-color: var(--bg-main);
  color: var(--text-main);
  line-height: 1.6;
  overflow-x: hidden;
  position: relative;
}

/* Decorative Background Glows */
body::before {
  content: '';
  position: absolute;
  top: -10%;
  left: 10%;
  width: 40vw;
  height: 40vw;
  background: radial-gradient(circle, rgba(99, 102, 241, 0.15) 0%, transparent 70%);
  z-index: -1;
  pointer-events: none;
  filter: blur(80px);
}

body::after {
  content: '';
  position: absolute;
  top: 50%;
  right: -5%;
  width: 45vw;
  height: 45vw;
  background: radial-gradient(circle, rgba(168, 85, 247, 0.1) 0%, transparent 70%);
  z-index: -1;
  pointer-events: none;
  filter: blur(100px);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.02em;
}

h1 {
  font-size: 2.75rem;
  margin-bottom: 1.5rem;
}

h2 {
  font-size: 2.25rem;
  margin-bottom: 2rem;
  text-align: center;
}

h3 {
  font-size: 1.5rem;
  margin-bottom: 1rem;
}

p {
  color: var(--text-muted);
  margin-bottom: 1.5rem;
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-secondary);
}

/* Layout & Container */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

section {
  padding: 6rem 0;
}

/* Header & Navigation */
header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 100;
  background: var(--bg-nav);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-color);
  transition: all var(--transition-normal);
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 4.5rem;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 1.35rem;
  color: #fff;
}

.logo img {
  height: 2.5rem;
  width: 2.5rem;
  border-radius: 8px;
  object-fit: cover;
  border: 1px solid rgba(255, 255, 255, 0.15);
}

.nav-links {
  display: flex;
  gap: 2rem;
  list-style: none;
}

.nav-links a {
  color: var(--text-muted);
  font-weight: 500;
  font-size: 0.95rem;
  padding: 0.5rem 0;
  position: relative;
  transition: color var(--transition-fast);
}

.nav-links a:hover,
.nav-links a.active {
  color: #fff;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary-glow);
  transition: width var(--transition-normal);
}

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

.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: #fff;
  font-size: 1.5rem;
  cursor: pointer;
}

/* Gradient Text & Utilities */
.gradient-text {
  background: var(--primary-glow);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.85rem 2rem;
  border-radius: 50px;
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  transition: all var(--transition-normal);
  border: none;
}

.btn-primary {
  background: var(--primary-glow);
  color: #fff;
  box-shadow: 0 4px 15px rgba(99, 102, 241, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(99, 102, 241, 0.5);
  color: #fff;
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.05);
  color: #fff;
  border: 1px solid var(--border-color);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.2);
  transform: translateY(-2px);
  color: #fff;
}

/* Glassmorphism Cards */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 2.5rem;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition: all var(--transition-normal);
}

.card:hover {
  border-color: rgba(99, 102, 241, 0.3);
  transform: translateY(-4px);
  box-shadow: var(--shadow-glow);
}

/* Hero Section */
.hero {
  position: relative;
  padding-top: 10rem;
  padding-bottom: 6rem;
  display: flex;
  align-items: center;
  min-height: 85vh;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 4rem;
  align-items: center;
}

.hero-content {
  max-width: 600px;
}

.hero-tagline {
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-primary);
  margin-bottom: 1rem;
  font-size: 0.9rem;
}

.hero h1 {
  font-size: 3.5rem;
  line-height: 1.15;
}

.hero p {
  font-size: 1.15rem;
  margin-bottom: 2rem;
}

.hero-buttons {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.hero-image-container {
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
}

.hero-image-wrapper {
  position: relative;
  width: 100%;
  max-width: 360px;
  aspect-ratio: 1;
  border-radius: 30px;
  padding: 10px;
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.3) 0%, rgba(168, 85, 247, 0.3) 100%);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.hero-image {
  width: 100%;
  height: 100%;
  border-radius: 20px;
  object-fit: cover;
  border: 1px solid rgba(255, 255, 255, 0.2);
}

/* App Stats Grid */
.stats-banner {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
  margin-top: 4rem;
}

.stat-item {
  text-align: center;
  padding: 1.5rem;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border-color);
  border-radius: 12px;
}

.stat-val {
  font-family: var(--font-heading);
  font-size: 2rem;
  font-weight: 800;
  color: #fff;
  margin-bottom: 0.25rem;
}

.stat-lbl {
  font-size: 0.85rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Features Section */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  margin-top: 3rem;
}

.feature-icon-wrapper {
  width: 3.5rem;
  height: 3.5rem;
  border-radius: 12px;
  background: rgba(99, 102, 241, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.5rem;
  color: var(--color-primary);
  font-size: 1.5rem;
  border: 1px solid rgba(99, 102, 241, 0.2);
}

.feature-card:hover .feature-icon-wrapper {
  background: var(--primary-glow);
  color: #fff;
  transform: scale(1.05);
  transition: all var(--transition-fast);
}

/* Transparency & Play Store Integrity Section */
.monetization-section {
  position: relative;
  background: radial-gradient(circle at top, rgba(99, 102, 241, 0.05), transparent 70%);
}

.monetization-card {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 4rem;
  align-items: center;
  padding: 4rem;
}

.monetization-list {
  list-style: none;
  margin-top: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.monetization-list li {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
}

.monetization-list li svg {
  color: var(--color-success);
  margin-top: 0.25rem;
  flex-shrink: 0;
}

/* Policy Documents Page Layout */
.policy-page {
  padding-top: 9rem;
  padding-bottom: 6rem;
  min-height: 80vh;
}

.policy-card {
  max-width: 850px;
  margin: 0 auto;
  padding: 4rem;
}

.policy-header {
  text-align: center;
  margin-bottom: 3rem;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 2rem;
}

.policy-header h1 {
  margin-bottom: 0.5rem;
}

.policy-date {
  font-size: 0.9rem;
  color: var(--text-muted);
}

.policy-content h2 {
  font-size: 1.6rem;
  text-align: left;
  margin-top: 2.5rem;
  margin-bottom: 1rem;
  color: #fff;
  border-left: 3px solid var(--color-primary);
  padding-left: 0.75rem;
}

.policy-content h3 {
  font-size: 1.2rem;
  margin-top: 1.5rem;
  margin-bottom: 0.75rem;
  color: var(--color-secondary);
}

.policy-content p {
  margin-bottom: 1.25rem;
  font-size: 1rem;
  line-height: 1.7;
}

.policy-content ul {
  margin-left: 1.5rem;
  margin-bottom: 1.5rem;
  color: var(--text-muted);
}

.policy-content li {
  margin-bottom: 0.5rem;
}

/* Contact / Deletion Request Form */
.form-group {
  margin-bottom: 1.5rem;
}

.form-group label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 500;
  font-size: 0.9rem;
  color: #fff;
}

.form-control {
  width: 100%;
  padding: 0.85rem 1rem;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-color);
  color: #fff;
  font-family: var(--font-body);
  font-size: 0.95rem;
  transition: all var(--transition-fast);
}

.form-control:focus {
  outline: none;
  border-color: var(--color-primary);
  background: rgba(255, 255, 255, 0.05);
  box-shadow: 0 0 0 2px rgba(99, 102, 241, 0.2);
}

textarea.form-control {
  resize: vertical;
  min-height: 120px;
}

.submit-alert {
  padding: 1rem;
  border-radius: 8px;
  margin-bottom: 1.5rem;
  font-weight: 500;
  display: none;
}

.submit-alert.success {
  background: rgba(52, 211, 153, 0.1);
  border: 1px solid rgba(52, 211, 153, 0.3);
  color: var(--color-success);
}

.submit-alert.error {
  background: rgba(248, 113, 113, 0.1);
  border: 1px solid rgba(248, 113, 113, 0.3);
  color: var(--color-danger);
}

/* Footer styling */
footer {
  border-top: 1px solid var(--border-color);
  padding: 4rem 0 2rem 0;
  background: #05070b;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: 4rem;
  margin-bottom: 3rem;
}

.footer-about h3 {
  color: #fff;
  font-family: var(--font-heading);
  margin-bottom: 1rem;
}

.footer-links-group {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.footer-links-group h4 {
  color: #fff;
  font-size: 0.95rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.75rem;
}

.footer-links-group a {
  color: var(--text-muted);
  font-size: 0.9rem;
}

.footer-links-group a:hover {
  color: #fff;
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* Responsive Breakpoints */
@media (max-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 3rem;
    text-align: center;
  }
  
  .hero-content {
    margin: 0 auto;
  }
  
  .hero-buttons {
    justify-content: center;
  }
  
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .monetization-card {
    grid-template-columns: 1fr;
    gap: 2.5rem;
    padding: 2.5rem;
  }
}

@media (max-width: 768px) {
  h1 {
    font-size: 2.5rem;
  }
  
  h2 {
    font-size: 1.75rem;
  }
  
  .hero h1 {
    font-size: 2.75rem;
  }
  
  .nav-links {
    display: none; /* Fallback for hamburger layout if needed */
  }
  
  .nav-toggle {
    display: block;
  }
  
  .stats-banner {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .features-grid {
    grid-template-columns: 1fr;
  }
  
  .policy-card {
    padding: 2rem;
  }
  
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }
  
  .footer-bottom {
    flex-direction: column;
    gap: 1rem;
    text-align: center;
  }
}