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

:root {
  --primary-color: #0B1F2A;
  --secondary-color: #4A90A4;
  --accent-color: #F6A623;
  --background-color: #F6F3EE;
  --card-bg: #FFFFFF;
  --text-color: #333333;
  --text-light: #666666;
  --border-radius: 12px;
  --shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
  --transition: all 0.3s ease;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
  background-color: var(--background-color);
  color: var(--text-color);
  line-height: 1.6;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Header */
header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  z-index: 1000;
  padding: 15px 0;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

nav {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary-color);
  font-family: 'Courier New', monospace;
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 30px;
  align-items: center;
}

.lang-switch {
  background: transparent;
  border: 2px solid var(--secondary-color);
  padding: 8px 16px;
  border-radius: 20px;
  cursor: pointer;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--secondary-color);
  transition: var(--transition);
}

.nav-links a {
  text-decoration: none;
  color: var(--text-color);
  font-weight: 500;
  transition: var(--transition);
}

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

.lang-switch {
  background: transparent;
  border: 2px solid var(--secondary-color);
  padding: 8px 16px;
  border-radius: 20px;
  cursor: pointer;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--secondary-color);
  transition: var(--transition);
}

.lang-switch:hover {
  background: var(--secondary-color);
  color: white;
}

/* Hero Section */
.hero {
  padding: 120px 20px 80px;
  text-align: center;
  background: linear-gradient(180deg, #FFFFFF 0%, var(--background-color) 100%);
}

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

.app-logo {
  width: 120px;
  height: 120px;
  border-radius: 24px;
  margin-bottom: 20px;
  box-shadow: var(--shadow);
}

.hero h1 {
  font-size: 3rem;
  color: var(--primary-color);
  margin-bottom: 10px;
}

.cta-button {
  display: inline-block;
  padding: 16px 32px;
  background: var(--secondary-color);
  color: white;
  text-decoration: none;
  border-radius: 50px;
  font-weight: 600;
  font-size: 1.1rem;
  transition: var(--transition);
  box-shadow: var(--shadow);
}

.cta-button:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 25px rgba(74, 144, 164, 0.4);
}

.privacy-link-inline {
  margin-top: 20px;
  font-size: 0.9rem;
}

.privacy-link-inline a {
  color: var(--secondary-color);
  text-decoration: none;
  transition: var(--transition);
}

.privacy-link-inline a:hover {
  text-decoration: underline;
}

/* Apps Showcase */
.apps-showcase {
  padding: 80px 20px;
  background: var(--card-bg);
  text-align: center;
}

.apps-showcase .subtitle {
  font-size: 1.1rem;
  color: var(--text-light);
  margin-top: 10px;
  margin-bottom: 50px;
}

.apps-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 30px;
  max-width: 800px;
  margin: 0 auto;
}

.app-card {
  background: var(--background-color);
  padding: 40px 30px;
  border-radius: var(--border-radius);
  text-decoration: none;
  color: var(--text-color);
  transition: var(--transition);
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.app-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.15);
}

.app-card-icon {
  width: 100px;
  height: 100px;
  border-radius: 22px;
  margin-bottom: 20px;
  box-shadow: var(--shadow);
  object-fit: contain;
  background: var(--background-color);
}

.app-card h3 {
  font-size: 1.5rem;
  color: var(--primary-color);
  margin-bottom: 10px;
}

.app-card p {
  color: var(--text-light);
  font-size: 0.95rem;
  margin-bottom: 15px;
  line-height: 1.6;
}

.app-link {
  color: var(--secondary-color);
  font-weight: 600;
  font-size: 0.9rem;
  transition: var(--transition);
}

.app-card:hover .app-link {
  color: var(--primary-color);
}

/* App Detail Section */
.app-detail {
  padding: 80px 20px;
  background: var(--background-color);
}

.app-header {
  display: flex;
  align-items: center;
  gap: 40px;
  margin-bottom: 60px;
  flex-wrap: wrap;
}

.app-detail-logo {
  width: 140px;
  height: 140px;
  border-radius: 28px;
  box-shadow: var(--shadow);
  flex-shrink: 0;
  object-fit: contain;
  background: var(--background-color);
  padding: 10px;
}

.app-header-content {
  flex: 1;
  min-width: 300px;
}

.app-header-content h2 {
  font-size: 2.5rem;
  color: var(--primary-color);
  margin-bottom: 10px;
}

.app-header-content .tagline {
  font-size: 1.3rem;
  color: var(--secondary-color);
  font-weight: 600;
  margin-bottom: 15px;
}

.app-header-content .description {
  font-size: 1.1rem;
  color: var(--text-light);
  margin-bottom: 30px;
  line-height: 1.7;
}

.app-intro {
  background: var(--card-bg);
  padding: 40px;
  border-radius: var(--border-radius);
  margin-top: 40px;
  text-align: center;
}

.app-intro h3 {
  font-size: 1.8rem;
  color: var(--primary-color);
  margin-bottom: 20px;
}

.app-intro .intro {
  font-size: 1.1rem;
  color: var(--text-light);
  max-width: 800px;
  margin: 0 auto;
  line-height: 1.7;
}

/* AdLens Detail Variation */
.adlens-detail {
  background: linear-gradient(180deg, #EFF2EA 0%, var(--background-color) 100%);
}

.adlens-detail .app-header-content h2 {
  color: #1EB980;
}

.adlens-detail .app-header-content .tagline {
  color: #1EB980;
}

/* App Privacy Link */
.app-privacy-link {
  margin-top: 60px;
}

.privacy-card {
  background: var(--card-bg);
  padding: 40px;
  border-radius: var(--border-radius);
  box-shadow: var(--shadow);
  text-align: center;
  border-left: 5px solid var(--secondary-color);
}

.privacy-icon {
  font-size: 2.5rem;
  margin-bottom: 15px;
}

.privacy-card h3 {
  font-size: 1.5rem;
  color: var(--primary-color);
  margin-bottom: 15px;
}

.privacy-card p {
  color: var(--text-light);
  margin-bottom: 25px;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.privacy-btn {
  display: inline-block;
  padding: 12px 30px;
  background: var(--secondary-color);
  color: white;
  text-decoration: none;
  border-radius: 50px;
  font-weight: 600;
  transition: var(--transition);
}

.privacy-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 15px rgba(74, 144, 164, 0.4);
}

/* App Info */
.app-info {
  padding: 80px 20px;
  text-align: center;
  background: var(--card-bg);
}

.app-info h2 {
  font-size: 2.2rem;
  color: var(--primary-color);
  margin-bottom: 20px;
}

.intro {
  font-size: 1.2rem;
  color: var(--text-light);
  max-width: 800px;
  margin: 0 auto;
}

.tagline {
  font-size: 1.3rem;
  color: var(--secondary-color);
  font-weight: 600;
  margin-bottom: 20px;
}

.description {
  font-size: 1.1rem;
  color: var(--text-light);
  margin-bottom: 15px;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.brand {
  color: var(--secondary-color);
  font-weight: 600;
  margin-bottom: 40px;
}

.store-buttons {
  display: flex;
  justify-content: center;
  gap: 20px;
  flex-wrap: wrap;
}

.store-btn {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 24px;
  border-radius: 10px;
  text-decoration: none;
  color: white;
  font-size: 0.9rem;
  transition: var(--transition);
}

.store-btn span {
  text-align: left;
  line-height: 1.3;
}

.store-btn strong {
  font-size: 1.1rem;
}

.app-store {
  background: #000000;
}

.app-store:hover {
  background: #333333;
  transform: translateY(-2px);
}

.play-store {
  background: linear-gradient(135deg, #34A853 0%, #25D366 100%);
}

.play-store:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 15px rgba(52, 168, 83, 0.4);
}

/* App Info */
.app-info {
  padding: 80px 20px;
  text-align: center;
  background: var(--card-bg);
}

.app-info h2 {
  font-size: 2.2rem;
  color: var(--primary-color);
  margin-bottom: 20px;
}

.intro {
  font-size: 1.2rem;
  color: var(--text-light);
  max-width: 800px;
  margin: 0 auto;
}

/* Features */
.features {
  padding: 80px 20px;
  background: var(--background-color);
}

.features h2 {
  text-align: center;
  font-size: 2.2rem;
  color: var(--primary-color);
  margin-bottom: 50px;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 30px;
}

.feature-card {
  background: var(--card-bg);
  padding: 30px;
  border-radius: var(--border-radius);
  box-shadow: var(--shadow);
  transition: var(--transition);
}

.feature-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.12);
}

.feature-icon {
  font-size: 2.5rem;
  margin-bottom: 15px;
}

.feature-card h3 {
  color: var(--primary-color);
  margin-bottom: 10px;
  font-size: 1.2rem;
}

.feature-card p {
  color: var(--text-light);
  font-size: 0.95rem;
}

/* Screenshots */
.screenshots {
  padding: 80px 20px;
  background: var(--card-bg);
}

.screenshots h2 {
  text-align: center;
  font-size: 2.2rem;
  color: var(--primary-color);
  margin-bottom: 50px;
}

.screenshots-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 30px;
}

.screenshot {
  text-align: center;
}

.screenshot img {
  width: 100%;
  max-width: 280px;
  border-radius: var(--border-radius);
  box-shadow: var(--shadow);
  transition: var(--transition);
}

.screenshot img:hover {
  transform: scale(1.02);
}

.screenshot p {
  margin-top: 15px;
  color: var(--text-light);
  font-size: 0.95rem;
}

/* Use Cases */
.use-cases {
  padding: 80px 20px;
  background: var(--background-color);
}

.use-cases h2 {
  text-align: center;
  font-size: 2.2rem;
  color: var(--primary-color);
  margin-bottom: 50px;
}

.use-cases-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 20px;
}

.use-case {
  background: var(--card-bg);
  padding: 20px 30px;
  border-radius: 50px;
  font-weight: 600;
  color: var(--primary-color);
  box-shadow: var(--shadow);
  transition: var(--transition);
}

.use-case:hover {
  transform: translateY(-3px);
  background: var(--secondary-color);
  color: white;
}

/* Help Section */
.help-section {
  padding: 80px 20px;
  background: var(--primary-color);
  color: white;
}

.help-section h2 {
  text-align: center;
  font-size: 2.2rem;
  margin-bottom: 15px;
}

.help-section > .container > p {
  text-align: center;
  color: rgba(255, 255, 255, 0.8);
  margin-bottom: 50px;
  font-size: 1.1rem;
}

.help-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 30px;
}

.help-card {
  background: rgba(255, 255, 255, 0.1);
  padding: 40px;
  border-radius: var(--border-radius);
  text-align: center;
  transition: var(--transition);
}

.help-card:hover {
  background: rgba(255, 255, 255, 0.15);
}

.help-icon {
  font-size: 3rem;
  margin-bottom: 20px;
}

.help-card h3 {
  margin-bottom: 15px;
  font-size: 1.3rem;
}

.help-card p {
  color: rgba(255, 255, 255, 0.8);
  margin-bottom: 25px;
}

.help-btn {
  display: inline-block;
  padding: 12px 30px;
  background: white;
  color: var(--primary-color);
  text-decoration: none;
  border-radius: 50px;
  font-weight: 600;
  transition: var(--transition);
}

.help-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 15px rgba(255, 255, 255, 0.3);
}

.help-btn.secondary {
  background: transparent;
  color: white;
  border: 2px solid white;
}

.help-btn.secondary:hover {
  background: white;
  color: var(--primary-color);
}

/* Footer */
footer {
  background: #0a1520;
  color: white;
  padding: 60px 20px 30px;
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 40px;
  margin-bottom: 40px;
}

.footer-brand h3 {
  font-size: 1.5rem;
  margin-bottom: 15px;
}

.footer-brand p {
  color: rgba(255, 255, 255, 0.7);
}

.domain {
  margin-top: 10px;
  font-family: 'Courier New', monospace;
  color: var(--accent-color);
}

.footer-links h4 {
  margin-bottom: 20px;
  font-size: 1.1rem;
}

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

.footer-links li {
  margin-bottom: 10px;
}

.footer-links a {
  color: rgba(255, 255, 255, 0.7);
  text-decoration: none;
  transition: var(--transition);
}

.footer-links a:hover {
  color: white;
}

.footer-bottom {
  text-align: center;
  padding-top: 30px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  color: rgba(255, 255, 255, 0.5);
}

/* Responsive */
@media (max-width: 768px) {
  .nav-links {
    display: none;
  }

  .lang-switch {
    margin-left: auto;
  }

  nav {
    justify-content: space-between;
  }

  .hero {
    padding: 100px 20px 60px;
  }

  .hero h1 {
    font-size: 2.2rem;
  }

  .tagline {
    font-size: 1.1rem;
  }

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

  .store-btn {
    width: 100%;
    max-width: 280px;
    justify-content: center;
  }

  .app-header {
    flex-direction: column;
    text-align: center;
    gap: 30px;
  }

  .app-detail-logo {
    width: 120px;
    height: 120px;
  }

  .app-header-content h2 {
    font-size: 2rem;
  }

  .cta-button {
    padding: 14px 28px;
    font-size: 1rem;
  }

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