:root {
  /* Gradient colors from logo */
  --color-pink: #FF6B9D;
  --color-purple: #C850C0;
  --color-indigo: #6366F1;
  --color-indigo-dark: #4F46E5;
  --color-cyan: #00D9FF;
  --color-teal: #00B4D8;
  --gradient-primary: linear-gradient(135deg, #FF6B9D 0%, #C850C0 30%, #6366F1 60%, #4F46E5 100%);
  --gradient-gold: linear-gradient(135deg, #FFD93D 0%, #FF6B6B 50%, #EE5A24 100%);

  --color-primary: #6366F1;
  --color-primary-dark: #4F46E5;
  --color-accent: #FF6B9D;
  --color-background: #fafafa;
  --color-surface: #ffffff;
  --color-text: #333333;
  --color-text-light: #666666;
  --color-border: #e0e0e0;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.1);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.1);
  --radius: 8px;
  --max-width: 1100px;
}

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

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "Helvetica Neue", Arial, sans-serif;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-background);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Header */
.site-header {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.nav-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 1rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
  color: var(--color-text);
  font-weight: 600;
  font-size: 1.25rem;
}

.logo img {
  height: 32px;
  width: auto;
}

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

.nav-links a {
  text-decoration: none;
  color: var(--color-text-light);
  font-weight: 500;
  transition: color 0.2s;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--color-primary);
}

.github-link::after {
  content: " ↗";
  font-size: 0.8em;
}

.lang-switcher a {
  padding: 0.25rem 0.5rem;
  border: 1px solid var(--color-border);
  border-radius: 4px;
  font-size: 0.85rem;
}

.lang-switcher a:hover {
  background: var(--color-background);
}

/* Mobile nav toggle */
.nav-toggle {
  display: none;
}

.nav-toggle-label {
  display: none;
  cursor: pointer;
  padding: 0.5rem;
}

.nav-toggle-label span,
.nav-toggle-label span::before,
.nav-toggle-label span::after {
  display: block;
  background: var(--color-text);
  height: 2px;
  width: 24px;
  border-radius: 2px;
  position: relative;
  transition: all 0.3s;
}

.nav-toggle-label span::before,
.nav-toggle-label span::after {
  content: '';
  position: absolute;
}

.nav-toggle-label span::before {
  top: -7px;
}

.nav-toggle-label span::after {
  top: 7px;
}

/* Main content */
.main-content {
  flex: 1;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 2rem;
  width: 100%;
}

/* Hero section */
.hero {
  text-align: center;
  padding: 4rem 0;
}

.hero-logo {
  width: 150px;
  height: auto;
  margin-bottom: 1.5rem;
}

.hero h1 {
  font-size: 3rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  color: var(--color-text);
}

.hero .tagline {
  font-size: 1.5rem;
  color: var(--color-text-light);
  margin-bottom: 2rem;
}

.cta-buttons {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

.btn {
  display: inline-block;
  padding: 0.875rem 2rem;
  border-radius: var(--radius);
  text-decoration: none;
  font-weight: 600;
  transition: all 0.2s;
}

.btn-primary {
  background: var(--gradient-primary);
  color: white;
  border: none;
}

.btn-primary:hover {
  background: var(--gradient-primary);
  filter: brightness(1.1);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(99, 102, 241, 0.4);
}

.btn-secondary {
  background: var(--color-surface);
  color: var(--color-text);
  border: 2px solid var(--color-border);
}

.btn-secondary:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

/* Features grid */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  margin: 3rem 0;
}

.feature-card {
  background: var(--color-surface);
  padding: 2rem;
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
}

.feature-card h3 {
  font-size: 1.25rem;
  margin-bottom: 0.75rem;
  color: var(--color-text);
}

.feature-card p {
  color: var(--color-text-light);
}

.feature-icon {
  font-size: 2rem;
  margin-bottom: 1rem;
  text-align: center;
}

/* Screenshots section */
.screenshots {
  margin: 4rem 0;
}

.screenshots h2 {
  text-align: center;
  margin-bottom: 2rem;
}

.screenshot-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
  gap: 2rem;
}

.screenshot {
  background: var(--color-surface);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--color-border);
}

.screenshot img {
  width: 100%;
  height: auto;
  display: block;
  cursor: pointer;
  transition: opacity 0.2s;
}

.screenshot img:hover {
  opacity: 0.9;
}

/* Lightbox */
.lightbox {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.9);
  z-index: 1000;
  cursor: pointer;
  align-items: center;
  justify-content: center;
}

.lightbox.active {
  display: flex;
}

.lightbox img {
  max-width: 90%;
  max-height: 90%;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
  border-radius: var(--radius);
}

.lightbox-close {
  position: absolute;
  top: 1rem;
  right: 1.5rem;
  color: white;
  font-size: 2.5rem;
  font-weight: 300;
  cursor: pointer;
  line-height: 1;
}

.lightbox-close:hover {
  color: var(--color-accent);
}

.screenshot-caption {
  padding: 1rem;
  text-align: center;
  color: var(--color-text-light);
  font-size: 0.9rem;
}

.screenshot-placeholder {
  background: linear-gradient(135deg, #e0e0e0 0%, #f5f5f5 100%);
  height: 250px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-light);
  font-style: italic;
}

/* Page content */
.page-header {
  max-width: 600px;
  margin: 0 auto 2rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--color-border);
}

.page-header h1 {
  font-size: 2.5rem;
}

.content {
  max-width: 600px;
  margin: 0 auto;
}

.content h2 {
  font-size: 1.75rem;
  margin: 2rem 0 1rem;
  color: var(--color-text);
}

.content h3 {
  font-size: 1.25rem;
  margin: 1.5rem 0 0.75rem;
  color: var(--color-text);
}

.content p {
  margin-bottom: 1rem;
}

.content ul, .content ol {
  margin: 1rem 0;
  padding-left: 2rem;
}

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

/* Download page */
.download-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
  margin: 2rem 0;
}

.download-card {
  background: var(--color-surface);
  padding: 2rem;
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
  text-align: center;
}

.download-card h3 {
  font-size: 1.5rem;
  margin-bottom: 0.5rem;
}

.download-card .platform-icon {
  font-size: 3rem;
  margin-bottom: 1rem;
}

.download-card .requirements {
  color: var(--color-text-light);
  font-size: 0.9rem;
  margin-bottom: 1.5rem;
}

/* Footer */
.site-footer {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  margin-top: auto;
}

.footer-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 2rem;
  text-align: center;
  color: var(--color-text-light);
  font-size: 0.9rem;
}

.footer-container a {
  color: var(--color-primary);
  text-decoration: none;
}

.footer-container a:hover {
  text-decoration: underline;
}

/* Responsive */
@media (max-width: 768px) {
  .nav-container {
    flex-wrap: wrap;
  }

  .nav-toggle-label {
    display: block;
    position: absolute;
    right: 1rem;
    top: 1rem;
  }

  .nav-links {
    display: none;
    flex-direction: column;
    width: 100%;
    text-align: center;
    padding: 1rem 0;
    gap: 0;
  }

  .nav-links li {
    padding: 0.75rem 0;
    border-top: 1px solid var(--color-border);
  }

  .nav-toggle:checked ~ .nav-links {
    display: flex;
  }

  .nav-toggle:checked ~ .nav-toggle-label span {
    background: transparent;
  }

  .nav-toggle:checked ~ .nav-toggle-label span::before {
    transform: rotate(45deg);
    top: 0;
  }

  .nav-toggle:checked ~ .nav-toggle-label span::after {
    transform: rotate(-45deg);
    top: 0;
  }

  .hero h1 {
    font-size: 2rem;
  }

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

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

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

  .download-cards {
    grid-template-columns: 1fr;
  }
}