:root {
  --color-primary: #3b82f6;
  --color-primary-dark: #2563eb;
  --color-primary-light: #60a5fa;
  --color-bg: #ffffff;
  --color-bg-secondary: #f9fafb;
  --color-text: #111827;
  --color-text-secondary: #6b7280;
  --color-border: #e5e7eb;
  --color-card: #ffffff;
  --color-shadow: rgba(0, 0, 0, 0.1);
  --gradient-primary: linear-gradient(135deg, #3b82f6 0%, #8b5cf6 100%);
  --gradient-hero: linear-gradient(180deg, #ffffff 0%, #f9fafb 100%);
}

[data-theme="dark"] {
  --color-primary: #60a5fa;
  --color-primary-dark: #3b82f6;
  --color-primary-light: #93c5fd;
  --color-bg: #0f172a;
  --color-bg-secondary: #1e293b;
  --color-text: #f1f5f9;
  --color-text-secondary: #94a3b8;
  --color-border: #334155;
  --color-card: #1e293b;
  --color-shadow: rgba(0, 0, 0, 0.3);
  --gradient-hero: linear-gradient(180deg, #0f172a 0%, #1e293b 100%);
}

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  transition: background-color 0.3s ease, color 0.3s ease;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Navigation */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  backdrop-filter: blur(10px);
  background: rgba(255, 255, 255, 0.8);
}

[data-theme="dark"] .nav {
  background: rgba(15, 23, 42, 0.8);
}

.nav-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 4rem;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--color-text);
  text-decoration: none;
}

.logo-icon {
  width: 2rem;
  height: 2rem;
  color: var(--color-primary);
}

.nav-links {
  display: flex;
  gap: 2rem;
  align-items: center;
}

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

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

.theme-toggle {
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  color: var(--color-text);
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 0.5rem;
  transition: background-color 0.2s;
}

.theme-toggle:hover {
  background: var(--color-bg-secondary);
}

.theme-toggle svg {
  width: 1.25rem;
  height: 1.25rem;
}

.sun-icon {
  display: none;
}

.moon-icon {
  display: block;
}

[data-theme="dark"] .sun-icon {
  display: block;
}

[data-theme="dark"] .moon-icon {
  display: none;
}

/* Hero Section */
.hero {
  padding: 6rem 0;
  background: var(--gradient-hero);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(circle at 20% 50%, rgba(59, 130, 246, 0.1) 0%, transparent 50%),
              radial-gradient(circle at 80% 80%, rgba(139, 92, 246, 0.1) 0%, transparent 50%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  text-align: center;
  max-width: 900px;
  margin: 0 auto;
}

.badge {
  display: inline-block;
  padding: 0.5rem 1rem;
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: 2rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-primary);
  margin-bottom: 2rem;
  box-shadow: 0 2px 8px var(--color-shadow);
}

.hero-title {
  font-size: 3.5rem;
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 1.5rem;
  letter-spacing: -0.02em;
}

.gradient-text {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-description {
  font-size: 1.25rem;
  color: var(--color-text-secondary);
  margin-bottom: 2.5rem;
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  justify-content: center;
  margin-bottom: 4rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.875rem 1.75rem;
  border-radius: 0.75rem;
  font-weight: 600;
  text-decoration: none;
  transition: all 0.2s;
  border: none;
  cursor: pointer;
  font-size: 1rem;
}

.btn svg {
  width: 1.25rem;
  height: 1.25rem;
}

.btn-primary {
  background: var(--color-primary);
  color: white;
  box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
}

.btn-primary:hover {
  background: var(--color-primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(59, 130, 246, 0.4);
}

.btn-secondary {
  background: var(--color-card);
  color: var(--color-text);
  border: 1px solid var(--color-border);
}

.btn-secondary:hover {
  background: var(--color-bg-secondary);
  transform: translateY(-2px);
}

.hero-stats {
  display: flex;
  gap: 3rem;
  justify-content: center;
  padding: 2rem;
  background: var(--color-card);
  border-radius: 1rem;
  border: 1px solid var(--color-border);
  box-shadow: 0 4px 16px var(--color-shadow);
}

.stat {
  text-align: center;
}

.stat-value {
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 0.25rem;
}

.stat-label {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  font-weight: 500;
}

/* Features Section */
.features {
  padding: 6rem 0;
}

.section-header {
  text-align: center;
  margin-bottom: 4rem;
}

.section-title {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 1rem;
}

.section-description {
  font-size: 1.125rem;
  color: var(--color-text-secondary);
}

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

.feature-card {
  padding: 2rem;
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: 1rem;
  transition: all 0.3s;
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px var(--color-shadow);
  border-color: var(--color-primary);
}

.feature-icon {
  width: 3rem;
  height: 3rem;
  background: var(--gradient-primary);
  border-radius: 0.75rem;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.5rem;
}

.feature-icon svg {
  width: 1.5rem;
  height: 1.5rem;
  color: white;
}

.feature-title {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
}

.feature-description {
  color: var(--color-text-secondary);
  line-height: 1.6;
}

/* Demo Section */
.demo {
  padding: 6rem 0;
  background: var(--color-bg-secondary);
}

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

/* Screenshots Section */
.screenshots {
  padding: 6rem 0;
  background: var(--color-bg-secondary);
}

.screenshot-category {
  margin-bottom: 4rem;
}

.screenshot-category:last-child {
  margin-bottom: 0;
}

.screenshot-category-title {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 2rem;
  text-align: center;
}

.screenshot-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(500px, 1fr));
  gap: 2rem;
  margin-bottom: 2rem;
}

.screenshot-grid.mobile {
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  max-width: 800px;
  margin: 0 auto;
}

.screenshot-item {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.screenshot-frame {
  background: var(--color-card);
  border-radius: 1rem;
  overflow: hidden;
  box-shadow: 0 10px 40px var(--color-shadow);
  border: 1px solid var(--color-border);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.screenshot-frame:hover {
  transform: translateY(-4px);
  box-shadow: 0 20px 60px var(--color-shadow);
}

.screenshot-frame.mobile {
  max-width: 375px;
  margin: 0 auto;
}

.screenshot-frame img {
  width: 100%;
  height: auto;
  display: block;
  cursor: pointer;
}

.screenshot-label {
  text-align: center;
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  font-weight: 500;
}

@media (max-width: 768px) {
  .screenshot-grid {
    grid-template-columns: 1fr;
  }
  
  .screenshot-grid.mobile {
    grid-template-columns: 1fr;
  }
}

/* Tech Stack Section */
.tech-stack {
  padding: 6rem 0;
}

.tech-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 2rem;
  max-width: 800px;
  margin: 0 auto;
}

.tech-item {
  text-align: center;
  padding: 2rem 1rem;
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: 1rem;
  transition: all 0.3s;
}

.tech-item:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px var(--color-shadow);
}

.tech-logo {
  font-size: 3rem;
  margin-bottom: 1rem;
}

.tech-name {
  font-weight: 600;
  color: var(--color-text);
}

/* Download Section */
.download {
  padding: 6rem 0;
  background: var(--gradient-hero);
}

.download-content {
  text-align: center;
  max-width: 900px;
  margin: 0 auto;
}

.download-title {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 1rem;
}

.download-description {
  font-size: 1.125rem;
  color: var(--color-text-secondary);
  margin-bottom: 3rem;
}

.download-options {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
  margin-bottom: 3rem;
}

.download-card {
  padding: 2rem;
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: 1rem;
  text-decoration: none;
  color: var(--color-text);
  transition: all 0.3s;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
}

.download-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px var(--color-shadow);
  border-color: var(--color-primary);
}

.download-icon {
  width: 4rem;
  height: 4rem;
  background: var(--gradient-primary);
  border-radius: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

.download-icon svg {
  width: 2rem;
  height: 2rem;
  color: white;
}

.download-card h3 {
  font-size: 1.25rem;
  font-weight: 600;
}

.download-card p {
  color: var(--color-text-secondary);
  font-size: 0.875rem;
}

.code-example {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: 1rem;
  overflow: hidden;
  text-align: left;
}

.code-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 1.5rem;
  background: var(--color-bg-secondary);
  border-bottom: 1px solid var(--color-border);
  font-weight: 500;
  font-size: 0.875rem;
}

.copy-btn {
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  color: var(--color-text-secondary);
  display: flex;
  align-items: center;
  border-radius: 0.5rem;
  transition: all 0.2s;
}

.copy-btn:hover {
  background: var(--color-bg);
  color: var(--color-primary);
}

.copy-btn svg {
  width: 1rem;
  height: 1rem;
}

.code-example pre {
  padding: 1.5rem;
  margin: 0;
  overflow-x: auto;
}

.code-example code {
  font-family: 'Monaco', 'Menlo', 'Courier New', monospace;
  font-size: 0.875rem;
  line-height: 1.6;
  color: var(--color-text);
}

/* Footer */
.footer {
  padding: 4rem 0 2rem;
  background: var(--color-bg-secondary);
  border-top: 1px solid var(--color-border);
}

.footer-content {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 4rem;
  margin-bottom: 3rem;
}

.footer-brand {
  max-width: 300px;
}

.footer-tagline {
  color: var(--color-text-secondary);
  margin-top: 1rem;
}

.footer-links {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 2rem;
}

.footer-column h4 {
  font-weight: 600;
  margin-bottom: 1rem;
}

.footer-column a {
  display: block;
  color: var(--color-text-secondary);
  text-decoration: none;
  margin-bottom: 0.75rem;
  transition: color 0.2s;
}

.footer-column a:hover {
  color: var(--color-primary);
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 2rem;
  border-top: 1px solid var(--color-border);
  color: var(--color-text-secondary);
  font-size: 0.875rem;
}

.footer-badges img {
  height: 1.25rem;
}

/* Responsive */
@media (max-width: 768px) {
  .nav-links {
    gap: 1rem;
  }

  .hero-title {
    font-size: 2.5rem;
  }

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

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

  .hero-stats {
    flex-direction: column;
    gap: 1.5rem;
  }

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

  .tech-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer-content {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .footer-bottom {
    flex-direction: column;
    gap: 1rem;
    text-align: center;
  }
}

/* Lightbox */
.lightbox {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.95);
  z-index: 1000;
  align-items: center;
  justify-content: center;
  padding: 2rem;
  cursor: zoom-out;
}

.lightbox.active {
  display: flex;
}

.lightbox-content {
  max-width: 95vw;
  max-height: 95vh;
  position: relative;
  cursor: default;
}

.lightbox-content img {
  max-width: 100%;
  max-height: 95vh;
  width: auto;
  height: auto;
  display: block;
  border-radius: 0.5rem;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
}

.lightbox-close {
  position: absolute;
  top: -3rem;
  right: 0;
  background: none;
  border: none;
  color: white;
  font-size: 2rem;
  cursor: pointer;
  padding: 0.5rem;
  width: 2.5rem;
  height: 2.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 0.5rem;
  transition: background-color 0.2s;
}

.lightbox-close:hover {
  background: rgba(255, 255, 255, 0.1);
}

.lightbox-nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  background: rgba(255, 255, 255, 0.1);
  border: none;
  color: white;
  font-size: 2rem;
  cursor: pointer;
  padding: 1rem;
  width: 3rem;
  height: 3rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 0.5rem;
  transition: background-color 0.2s;
  backdrop-filter: blur(10px);
}

.lightbox-nav:hover {
  background: rgba(255, 255, 255, 0.2);
}

.lightbox-nav.prev {
  left: -4rem;
}

.lightbox-nav.next {
  right: -4rem;
}

.lightbox-nav svg {
  width: 1.5rem;
  height: 1.5rem;
}

.lightbox-caption {
  position: absolute;
  bottom: -3rem;
  left: 0;
  right: 0;
  text-align: center;
  color: white;
  font-size: 0.875rem;
  font-weight: 500;
}

@media (max-width: 768px) {
  .lightbox {
    padding: 1rem;
  }
  
  .lightbox-close {
    top: 1rem;
    right: 1rem;
  }
  
  .lightbox-nav.prev {
    left: 1rem;
  }
  
  .lightbox-nav.next {
    right: 1rem;
  }
  
  .lightbox-caption {
    bottom: 1rem;
  }
}

/* Animations */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.hero-content,
.feature-card,
.tech-item {
  animation: fadeIn 0.6s ease-out;
}