/* Reset and Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --primary-color: #1a1a2e;
  --secondary-color: #16213e;
  --accent-color: #e94560;
  --text-color: #333;
  --text-light: #666;
  --bg-color: #ffffff;
  --bg-light: #f8f9fa;
  --border-color: #e0e0e0;
  --card-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  --card-shadow-hover: 0 8px 16px rgba(0, 0, 0, 0.15);
}

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

/* Header */
header {
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
  color: white;
  padding: 1rem 0;
  box-shadow: var(--card-shadow);
  position: sticky;
  top: 0;
  z-index: 1000;
}

nav {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
}

.logo {
  font-size: 1.5rem;
  font-weight: bold;
  text-decoration: none;
  color: white;
}

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

.nav-links a {
  color: white;
  text-decoration: none;
  transition: opacity 0.3s;
}

.nav-links a:hover {
  opacity: 0.8;
}

.lang-switcher {
  display: flex;
  gap: 0.5rem;
  align-items: center;
}

.lang-switcher a {
  color: white;
  text-decoration: none;
  padding: 0.25rem 0.5rem;
  border-radius: 4px;
  transition: background-color 0.3s;
}

.lang-switcher a:hover,
.lang-switcher a.active {
  background-color: rgba(255, 255, 255, 0.2);
}

/* Main Content */
main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem 1rem;
}

/* Hero Section */
.hero {
  text-align: center;
  padding: 4rem 1rem;
  background: linear-gradient(135deg, var(--bg-light) 0%, var(--bg-color) 100%);
  border-radius: 12px;
  margin-bottom: 3rem;
}

.hero .hero-logo {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.hero .hero-logo img {
  width: 120px;
  height: 120px;
  border-radius: 24px;
  box-shadow: var(--card-shadow);
}

.hero h1 {
  font-size: 2.5rem;
  margin-bottom: 1rem;
  color: var(--primary-color);
}

.hero p {
  font-size: 1.25rem;
  color: var(--text-light);
  margin-bottom: 2rem;
}

/* Download Buttons */
.download-buttons {
  display: flex;
  justify-content: center;
  gap: 1.5rem;
  flex-wrap: wrap;
  margin: 2rem 0;
}

.download-btn {
  display: inline-block;
  transition: transform 0.3s, box-shadow 0.3s;
  text-decoration: none;
}

.download-btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--card-shadow-hover);
}

.download-btn img {
  height: 60px;
  width: auto;
  display: block;
}

/* Screenshot Gallery */
.screenshot-gallery {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1.5rem;
  margin: 3rem 0;
}

.screenshot-item {
  border-radius: 12px;
  overflow: hidden;
  box-shadow: var(--card-shadow);
  transition: transform 0.3s, box-shadow 0.3s;
}

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

.screenshot-item img {
  width: 100%;
  height: auto;
  display: block;
}

/* Features Section */
.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
  margin: 3rem 0;
}

.feature-card {
  background: var(--bg-light);
  padding: 2rem;
  border-radius: 12px;
  box-shadow: var(--card-shadow);
  transition: transform 0.3s, box-shadow 0.3s;
}

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

.feature-card h3 {
  color: var(--primary-color);
  margin-bottom: 1rem;
  font-size: 1.5rem;
}

/* Content Sections */
.content-section {
  margin: 3rem 0;
  padding: 2rem;
  background: var(--bg-light);
  border-radius: 12px;
}

.content-section h2 {
  color: var(--primary-color);
  margin-bottom: 1.5rem;
  font-size: 2rem;
  border-bottom: 3px solid var(--accent-color);
  padding-bottom: 0.5rem;
}

.content-section h3 {
  color: var(--secondary-color);
  margin-top: 2rem;
  margin-bottom: 1rem;
  font-size: 1.5rem;
}

.content-section h4 {
  color: var(--secondary-color);
  margin-top: 1.5rem;
  margin-bottom: 0.75rem;
  font-size: 1.25rem;
}

.content-section p {
  margin-bottom: 1rem;
  line-height: 1.8;
}

.content-section ul,
.content-section ol {
  margin-left: 2rem;
  margin-bottom: 1rem;
}

.content-section li {
  margin-bottom: 0.5rem;
  line-height: 1.8;
}

/* Footer */
footer {
  background: var(--primary-color);
  color: white;
  text-align: center;
  padding: 2rem 1rem;
  margin-top: 4rem;
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 2rem;
  flex-wrap: wrap;
  margin-bottom: 1rem;
}

.footer-links a {
  color: white;
  text-decoration: none;
  transition: opacity 0.3s;
}

.footer-links a:hover {
  opacity: 0.8;
}

/* Responsive Design */
@media (max-width: 768px) {
  .hero h1 {
    font-size: 2rem;
  }

  .hero p {
    font-size: 1rem;
  }

  .hero .hero-logo img {
    width: 96px;
    height: 96px;
  }

  .nav-links {
    gap: 1rem;
    font-size: 0.9rem;
  }

  .download-btn img {
    height: 50px;
  }

  .screenshot-gallery {
    grid-template-columns: 1fr;
  }

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

  main {
    padding: 1rem;
  }
}

@media (max-width: 480px) {
  .hero {
    padding: 2rem 1rem;
  }

  .hero h1 {
    font-size: 1.75rem;
  }

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

/* Accessibility */
a:focus,
button:focus {
  outline: 2px solid var(--accent-color);
  outline-offset: 2px;
}

/* Print Styles */
@media print {
  header,
  footer,
  .download-buttons {
    display: none;
  }

  body {
    background: white;
  }
}