/* Bau Cua 2026 - Candy Crush Inspired Design */

:root {
  /* Candy Crush Color Palette */
  --candy-pink: #FF6B9D;
  --candy-purple: #C44569;
  --candy-blue: #4ECDC4;
  --candy-yellow: #FFE66D;
  --candy-orange: #FF6B35;
  --candy-green: #06FFA5;
  --candy-red: #FF5252;

  /* Gradients */
  --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --gradient-candy: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
  --gradient-rainbow: linear-gradient(135deg, #FA8BFF 0%, #2BD2FF 52%, #2BFF88 90%);
  --gradient-sunset: linear-gradient(135deg, #FFA69E 0%, #FCBAAD 30%, #FAE1DD 100%);
  --gradient-ocean: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
  --gradient-lemon: linear-gradient(135deg, #fdeb71 0%, #f8d800 100%);

  /* Text */
  --text-dark: #2C3E50;
  --text-white: #FFFFFF;
  --text-gray: #7F8C8D;

  /* Shadows */
  --shadow-soft: 0 10px 40px rgba(0,0,0,0.1);
  --shadow-medium: 0 15px 50px rgba(0,0,0,0.15);
  --shadow-hard: 0 20px 60px rgba(0,0,0,0.2);
  --shadow-candy: 0 10px 30px rgba(255, 107, 157, 0.3);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Nunito', 'Comic Sans MS', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: var(--text-dark);
  line-height: 1.6;
  overflow-x: hidden;
}

/* Animated Candy Background */
.bg-animation {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  background:
    radial-gradient(circle at 20% 50%, rgba(255, 107, 157, 0.15) 0%, transparent 50%),
    radial-gradient(circle at 80% 80%, rgba(76, 236, 196, 0.15) 0%, transparent 50%),
    radial-gradient(circle at 40% 20%, rgba(255, 230, 109, 0.15) 0%, transparent 50%),
    linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  animation: gradientShift 15s ease infinite;
}

@keyframes gradientShift {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.8; }
}

/* Floating Candy Particles */
.candy-particle {
  position: absolute;
  width: 30px;
  height: 30px;
  background: var(--gradient-candy);
  border-radius: 50%;
  opacity: 0.3;
  animation: float 20s infinite ease-in-out;
}

@keyframes float {
  0%, 100% { transform: translateY(0) rotate(0deg); }
  50% { transform: translateY(-100px) rotate(180deg); }
}

/* Navigation - Candy Style */
nav {
  position: fixed;
  top: 0;
  width: 100%;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(20px);
  padding: 1rem 0;
  z-index: 1000;
  box-shadow: var(--shadow-soft);
  border-bottom: 3px solid var(--candy-pink);
}

nav .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
}

.logo {
  font-size: 1.8rem;
  font-weight: 900;
  background: var(--gradient-candy);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-transform: uppercase;
  letter-spacing: -1px;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.logo-icon {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  box-shadow: 0 4px 15px rgba(0,0,0,0.15);
}

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

.nav-links a {
  color: var(--text-dark);
  text-decoration: none;
  font-weight: 700;
  transition: all 0.3s;
  position: relative;
  padding: 0.5rem 0;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 3px;
  background: var(--gradient-candy);
  transition: width 0.3s;
  border-radius: 10px;
}

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

.cta-button {
  background: var(--gradient-candy);
  color: white;
  padding: 0.8rem 2rem;
  border-radius: 50px;
  text-decoration: none;
  font-weight: 800;
  transition: all 0.3s;
  box-shadow: var(--shadow-candy);
  text-transform: uppercase;
  font-size: 0.9rem;
  letter-spacing: 0.5px;
}

.cta-button:hover {
  transform: translateY(-3px) scale(1.05);
  box-shadow: 0 15px 40px rgba(255, 107, 157, 0.4);
}

/* Hero Section - Candy Style */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 8rem 2rem 4rem;
  position: relative;
}

.hero-content {
  max-width: 900px;
  animation: bounceIn 1s ease-out;
}

@keyframes bounceIn {
  0% {
    opacity: 0;
    transform: scale(0.3);
  }
  50% {
    opacity: 1;
    transform: scale(1.05);
  }
  70% {
    transform: scale(0.9);
  }
  100% {
    transform: scale(1);
  }
}

.hero h1 {
  font-size: 4.5rem;
  font-weight: 900;
  margin-bottom: 1rem;
  background: linear-gradient(135deg, #FFE66D 0%, #FF6B9D 50%, #4ECDC4 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1.1;
  text-shadow: 0 5px 15px rgba(0,0,0,0.1);
  letter-spacing: -2px;
}

.hero .subtitle {
  font-size: 1.8rem;
  color: white;
  margin-bottom: 2rem;
  font-weight: 700;
  text-shadow: 0 2px 10px rgba(0,0,0,0.2);
}

.hero-buttons {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 2rem;
}

.btn-primary {
  background: white;
  color: var(--candy-purple);
  padding: 1.2rem 3rem;
  border-radius: 50px;
  text-decoration: none;
  font-weight: 800;
  font-size: 1.2rem;
  transition: all 0.3s;
  box-shadow: 0 10px 40px rgba(255,255,255,0.3);
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.btn-primary:hover {
  transform: translateY(-5px) scale(1.05);
  box-shadow: 0 15px 50px rgba(255,255,255,0.4);
  animation: wiggle 0.5s ease-in-out;
}

@keyframes wiggle {
  0%, 100% { transform: translateY(-5px) rotate(0deg); }
  25% { transform: translateY(-5px) rotate(-5deg); }
  75% { transform: translateY(-5px) rotate(5deg); }
}

.btn-secondary {
  background: transparent;
  color: white;
  padding: 1.2rem 3rem;
  border: 3px solid white;
  border-radius: 50px;
  text-decoration: none;
  font-weight: 800;
  font-size: 1.2rem;
  transition: all 0.3s;
  text-transform: uppercase;
}

.btn-secondary:hover {
  background: white;
  color: var(--candy-purple);
  transform: translateY(-5px);
}

/* Features Section - Candy Cards */
.features {
  padding: 6rem 2rem;
  background: white;
  position: relative;
}

.features::before {
  content: '';
  position: absolute;
  top: -50px;
  left: 0;
  right: 0;
  height: 100px;
  background: white;
  border-radius: 50% 50% 0 0;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
}

.section-title {
  text-align: center;
  font-size: 3.5rem;
  font-weight: 900;
  margin-bottom: 1rem;
  background: var(--gradient-candy);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -1px;
}

.section-subtitle {
  text-align: center;
  font-size: 1.3rem;
  color: var(--text-gray);
  margin-bottom: 4rem;
  font-weight: 600;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  margin-bottom: 3rem;
}

.feature-card {
  background: white;
  border-radius: 25px;
  padding: 2.5rem;
  transition: all 0.3s;
  text-align: center;
  box-shadow: var(--shadow-soft);
  border: 3px solid transparent;
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(255,107,157,0.1) 0%, transparent 70%);
  opacity: 0;
  transition: opacity 0.3s;
}

.feature-card:hover::before {
  opacity: 1;
  animation: sparkle 1.5s ease-in-out infinite;
}

@keyframes sparkle {
  0%, 100% { transform: rotate(0deg); }
  50% { transform: rotate(180deg); }
}

.feature-card:hover {
  transform: translateY(-15px) scale(1.03);
  box-shadow: var(--shadow-hard);
  border-color: var(--candy-pink);
}

.feature-card:nth-child(1) { border-color: #FF6B9D; }
.feature-card:nth-child(2) { border-color: #4ECDC4; }
.feature-card:nth-child(3) { border-color: #FFE66D; }
.feature-card:nth-child(4) { border-color: #FF6B35; }
.feature-card:nth-child(5) { border-color: #06FFA5; }
.feature-card:nth-child(6) { border-color: #C44569; }

.feature-icon {
  width: 80px;
  height: 80px;
  margin: 0 auto 1.5rem;
  background: var(--gradient-rainbow);
  border-radius: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 10px 30px rgba(0,0,0,0.15);
  animation: bounce 2s infinite;
}

@keyframes bounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

.feature-icon svg {
  width: 50px;
  height: 50px;
  color: white;
  filter: drop-shadow(0 2px 5px rgba(0,0,0,0.2));
}

.feature-card h3 {
  font-size: 1.6rem;
  margin-bottom: 1rem;
  color: var(--text-dark);
  font-weight: 800;
}

.feature-card p {
  color: var(--text-gray);
  line-height: 1.8;
  font-weight: 600;
}

/* Topics Section - Candy Grid */
.topics {
  padding: 6rem 2rem;
  background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
}

.topics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1.5rem;
}

.topic-card {
  background: white;
  border-radius: 20px;
  padding: 2rem;
  transition: all 0.3s;
  cursor: pointer;
  box-shadow: var(--shadow-soft);
  border: 3px solid transparent;
  position: relative;
  overflow: hidden;
}

.topic-card::after {
  content: '✨';
  position: absolute;
  top: 10px;
  right: 10px;
  font-size: 1.5rem;
  opacity: 0;
  transition: opacity 0.3s;
}

.topic-card:hover::after {
  opacity: 1;
  animation: rotate 1s linear infinite;
}

@keyframes rotate {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

.topic-card:hover {
  transform: scale(1.08) rotate(-2deg);
  box-shadow: var(--shadow-medium);
  border-color: var(--candy-pink);
}

.topic-age {
  color: var(--candy-purple);
  font-size: 0.85rem;
  font-weight: 800;
  margin-bottom: 0.5rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.topic-card h4 {
  font-size: 1.3rem;
  margin-bottom: 0.5rem;
  color: var(--text-dark);
  font-weight: 800;
}

.topic-card p {
  color: var(--text-gray);
  font-size: 0.95rem;
  font-weight: 600;
}

/* Download Section - Candy Style */
.download {
  padding: 6rem 2rem;
  background: white;
  text-align: center;
  position: relative;
}

.download::before {
  content: '';
  position: absolute;
  top: -50px;
  left: 0;
  right: 0;
  height: 100px;
  background: white;
  border-radius: 50% 50% 0 0;
}

.download-buttons {
  display: flex;
  gap: 2rem;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 2rem;
}

.store-button {
  transition: all 0.3s;
  filter: drop-shadow(0 10px 20px rgba(0,0,0,0.15));
}

.store-button:hover {
  transform: translateY(-10px) scale(1.1);
  filter: drop-shadow(0 15px 30px rgba(0,0,0,0.25));
}

.store-button img {
  height: 60px;
  width: auto;
}

/* Footer - Candy Style */
footer {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  padding: 3rem 2rem 1rem;
  border-top: 5px solid var(--candy-pink);
}

.footer-content {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
  margin-bottom: 2rem;
}

.footer-section h3 {
  color: var(--candy-yellow);
  margin-bottom: 1rem;
  font-weight: 800;
  font-size: 1.2rem;
}

.footer-section ul {
  list-style: none;
}

.footer-section a {
  color: rgba(255,255,255,0.9);
  text-decoration: none;
  transition: all 0.3s;
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 600;
}

.footer-section a:hover {
  color: var(--candy-yellow);
  transform: translateX(5px);
}

.footer-bottom {
  text-align: center;
  padding-top: 2rem;
  border-top: 2px solid rgba(255,255,255,0.2);
  font-weight: 600;
}

/* Mobile Responsive */
@media (max-width: 768px) {
  .hero h1 {
    font-size: 2.5rem;
  }

  .hero .subtitle {
    font-size: 1.2rem;
  }

  .section-title {
    font-size: 2.2rem;
  }

  .features-grid,
  .topics-grid {
    grid-template-columns: 1fr;
  }

  .hero-buttons {
    flex-direction: column;
  }

  .download-buttons {
    flex-direction: column;
    align-items: center;
  }

  .nav-links {
    display: none;
  }
}

/* Scroll Animations */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s, transform 0.6s;
}

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

/* Loading Animation */
@keyframes pulse {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.5;
  }
}

.animate-pulse {
  animation: pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

/* Sparkle Effect */
.sparkle {
  position: relative;
}

.sparkle::after {
  content: '✨';
  position: absolute;
  animation: twinkle 1.5s infinite;
}

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

/* Content Pages (Privacy, Terms, Support) */
.content-page {
  min-height: 100vh;
  padding: 8rem 1rem 4rem;
  background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
}

.content-container {
  max-width: 900px;
  margin: 0 auto;
  background: white;
  border-radius: 30px;
  padding: 3rem 2rem;
  box-shadow: 0 20px 60px rgba(0,0,0,0.1);
}

.content-container h1 {
  font-size: 3rem;
  font-weight: 900;
  margin-bottom: 1.5rem;
  background: var(--gradient-candy);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-align: center;
  letter-spacing: -1px;
}

.content-container h2 {
  font-size: 2rem;
  color: var(--candy-purple);
  margin-top: 2.5rem;
  margin-bottom: 1.5rem;
  font-weight: 800;
}

.content-container h3 {
  font-size: 1.5rem;
  color: var(--candy-blue);
  margin-top: 2rem;
  margin-bottom: 1rem;
  font-weight: 700;
}

.content-container p {
  color: var(--text-gray);
  line-height: 1.8;
  margin-bottom: 1rem;
  font-weight: 600;
}

.content-container ul,
.content-container ol {
  color: var(--text-gray);
  margin-left: 1.5rem;
  margin-bottom: 1rem;
  line-height: 2;
  font-weight: 600;
}

.content-container a {
  color: var(--candy-pink);
  text-decoration: none;
  font-weight: 700;
  transition: opacity 0.3s;
}

.content-container a:hover {
  opacity: 0.7;
  text-decoration: underline;
}

/* Support Cards */
.support-card {
  background: white;
  border: 3px solid var(--candy-blue);
  border-radius: 20px;
  padding: 2rem;
  margin-bottom: 2rem;
  box-shadow: 0 10px 30px rgba(0,0,0,0.1);
}

.support-card h2,
.support-card h3 {
  color: var(--candy-purple);
  margin-top: 0;
  font-weight: 800;
}

.support-card ul {
  list-style: none;
  padding-left: 0;
}

.support-card li {
  margin-bottom: 0.8rem;
  font-weight: 600;
}

/* FAQ Items */
.faq-item {
  background: white;
  border-radius: 15px;
  padding: 1.5rem;
  margin-bottom: 1.5rem;
  border-left: 5px solid var(--candy-pink);
  box-shadow: 0 5px 15px rgba(0,0,0,0.05);
  transition: all 0.3s;
}

.faq-item:hover {
  transform: translateX(5px);
  box-shadow: 0 8px 25px rgba(0,0,0,0.1);
}

.faq-question {
  font-size: 1.2rem;
  font-weight: 800;
  color: var(--candy-purple);
  margin-bottom: 1rem;
}

.faq-answer {
  color: var(--text-gray);
  line-height: 1.8;
  font-weight: 600;
}

.faq-answer ul,
.faq-answer ol {
  margin-top: 0.5rem;
  margin-left: 1.5rem;
}

.last-updated {
  color: var(--text-gray);
  font-size: 0.95rem;
  font-style: italic;
  margin-top: 3rem;
  text-align: center;
  font-weight: 600;
}

/* Mobile Responsive for Content Pages */
@media (max-width: 768px) {
  .content-page {
    padding: 6rem 0.5rem 2rem;
  }

  .content-container {
    padding: 2rem 1.5rem;
    border-radius: 20px;
  }

  .content-container h1 {
    font-size: 2rem;
  }

  .content-container h2 {
    font-size: 1.6rem;
  }

  .content-container h3 {
    font-size: 1.3rem;
  }

  .support-card {
    padding: 1.5rem;
  }

  .faq-item {
    padding: 1.2rem;
  }
}

/* Special Content Cards */
.content-highlight {
  background: linear-gradient(135deg, #FFF9E6 0%, #FFE66D 100%);
  border-left: 5px solid var(--candy-yellow);
  padding: 1.5rem;
  border-radius: 12px;
  margin: 1.5rem 0;
}

.content-warning {
  background: linear-gradient(135deg, #FFEBEE 0%, #FF6B9D 100%);
  border-left: 5px solid var(--candy-red);
  padding: 1.5rem;
  border-radius: 12px;
  margin: 1.5rem 0;
  color: white;
}

.content-success {
  background: linear-gradient(135deg, #E8F5E9 0%, #06FFA5 100%);
  border-left: 5px solid var(--candy-green);
  padding: 1.5rem;
  border-radius: 12px;
  margin: 1.5rem 0;
}

.content-info {
  background: linear-gradient(135deg, #E3F2FD 0%, #4ECDC4 100%);
  border-left: 5px solid var(--candy-blue);
  padding: 1.5rem;
  border-radius: 12px;
  margin: 1.5rem 0;
}