/* CSS Reset and Variables */
:root {
  --primary-color: #3b82f6;
  --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --secondary-color: #8b5cf6;
  --accent-color: #06b6d4;
  --background: #0f172a;
  --surface: #1e293b;
  --surface-light: #334155;
  --text-primary: #f8fafc;
  --text-secondary: #cbd5e1;
  --text-muted: #94a3b8;
  --border: #475569;
  --shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1),
    0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --shadow-lg: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
  --border-radius: 12px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
  font-family: "Inter", -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--background);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
}

/* Typography */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-weight: 600;
  line-height: 1.2;
}

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

/* Navigation */
.nav {
  position: fixed;
  top: 0;
  width: 100%;
  background: rgba(15, 23, 42, 0.8);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  z-index: 1000;
  transition: var(--transition);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 700;
  font-size: 1.25rem;
}

.brand-icon {
  font-size: 1.5rem;
}

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

.nav-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
  transition: var(--transition);
  position: relative;
}

.nav-link:hover {
  color: var(--text-primary);
}

.nav-link::after {
  content: "";
  position: absolute;
  bottom: -0.5rem;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary-gradient);
  transition: var(--transition);
}

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

/* Hero Section */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 8rem 2rem 4rem;
  position: relative;
  overflow: hidden;
}

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

.hero-container {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.hero-title {
  font-size: 3.5rem;
  font-weight: 700;
  margin-bottom: 1.5rem;
  line-height: 1.1;
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--text-secondary);
  margin-bottom: 2rem;
  max-width: 600px;
}

.hero-buttons {
  display: flex;
  gap: 1rem;
  margin-bottom: 3rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 1rem 2rem;
  border-radius: var(--border-radius);
  text-decoration: none;
  font-weight: 600;
  transition: var(--transition);
  border: none;
  cursor: pointer;
}

.btn-primary {
  background: var(--primary-gradient);
  color: white;
  box-shadow: var(--shadow);
}

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

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

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

.btn-icon {
  width: 1.25rem;
  height: 1.25rem;
}

.hero-stats {
  display: flex;
  gap: 2rem;
}

.stat {
  text-align: center;
}

.stat-number {
  display: block;
  font-size: 2rem;
  font-weight: 700;
  color: var(--accent-color);
}

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

/* Hero Visual */
.demo-container {
  display: flex;
  align-items: center;
  gap: 2rem;
  padding: 2rem;
  background: var(--surface);
  border-radius: var(--border-radius);
  border: 1px solid var(--border);
}

.demo-before,
.demo-after {
  text-align: center;
}

.demo-image {
  width: 120px;
  height: 90px;
  border-radius: 8px;
  margin-bottom: 1rem;
  position: relative;
  overflow: hidden;
}

.demo-image.before {
  background: linear-gradient(45deg, #64748b 25%, transparent 25%),
    linear-gradient(-45deg, #64748b 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, #64748b 75%),
    linear-gradient(-45deg, transparent 75%, #64748b 75%);
  background-size: 8px 8px;
  background-position: 0 0, 0 4px, 4px -4px, -4px 0px;
}

.demo-image.after {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.demo-arrow {
  font-size: 2rem;
  color: var(--accent-color);
  animation: pulse 2s infinite;
}

.demo-label {
  font-size: 0.875rem;
  color: var(--text-muted);
}

@keyframes pulse {
  0%,
  100% {
    opacity: 1;
  }
  50% {
    opacity: 0.5;
  }
}

/* Features Section */
.features {
  padding: 6rem 2rem;
  background: var(--surface);
}

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

.section-title {
  font-size: 2.5rem;
  text-align: center;
  margin-bottom: 3rem;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 2rem;
}

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

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

.feature-icon {
  font-size: 2.5rem;
  margin-bottom: 1rem;
}

.feature-title {
  font-size: 1.25rem;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

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

/* Performance Section */
.performance {
  padding: 6rem 2rem;
}

.performance-container {
  max-width: 1200px;
  margin: 0 auto;
  text-align: center;
}

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

.benchmark-card {
  background: var(--surface);
  padding: 2rem;
  border-radius: var(--border-radius);
  border: 1px solid var(--border);
}

.benchmark-card h3 {
  color: var(--text-primary);
  margin-bottom: 1rem;
}

.benchmark-stat {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--accent-color);
  margin: 1rem 0;
}

.benchmark-quality {
  font-size: 1.25rem;
}

.benchmark-note {
  color: var(--text-muted);
  font-style: italic;
  margin-top: 2rem;
}

/* Download Section */
.download {
  padding: 6rem 2rem;
  background: var(--surface);
}

.download-container {
  max-width: 1200px;
  margin: 0 auto;
  text-align: center;
}

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

.download-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
  margin-bottom: 4rem;
}

.download-card {
  background: var(--background);
  padding: 2rem;
  border-radius: var(--border-radius);
  border: 1px solid var(--border);
  transition: var(--transition);
}

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

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

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

.download-card p {
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
}

.download-btn {
  display: inline-block;
  background: var(--primary-gradient);
  color: white;
  padding: 0.75rem 1.5rem;
  border-radius: var(--border-radius);
  text-decoration: none;
  font-weight: 600;
  transition: var(--transition);
}

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

.system-requirements {
  background: var(--background);
  padding: 2rem;
  border-radius: var(--border-radius);
  border: 1px solid var(--border);
}

.system-requirements h3 {
  margin-bottom: 1.5rem;
  color: var(--text-primary);
}

.requirements-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
}

.requirement {
  color: var(--text-secondary);
  text-align: left;
}

/* Footer */
.footer {
  padding: 3rem 2rem 2rem;
  background: var(--background);
  border-top: 1px solid var(--border);
}

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

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 2rem;
}

.footer-links {
  display: flex;
  gap: 2rem;
}

.footer-links a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: var(--transition);
}

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

.footer-bottom {
  text-align: center;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
  color: var(--text-muted);
}

.footer-bottom p {
  margin: 0.5rem 0;
}

/* Responsive Design */
@media (max-width: 1024px) {
  .hero-container {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .hero-title {
    font-size: 3rem;
  }

  .nav-container {
    padding: 1rem;
  }

  .nav-links {
    gap: 1rem;
  }
}

@media (max-width: 768px) {
  .hero-title {
    font-size: 2.5rem;
  }

  .hero-subtitle {
    font-size: 1.125rem;
  }

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

  .btn {
    width: 100%;
    max-width: 300px;
    justify-content: center;
  }

  .hero-stats {
    justify-content: center;
  }

  .demo-container {
    flex-direction: column;
    gap: 1rem;
  }

  .demo-arrow {
    transform: rotate(90deg);
  }

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

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

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

  .footer-content {
    flex-direction: column;
    gap: 1rem;
  }

  .footer-links {
    flex-wrap: wrap;
    justify-content: center;
  }

  .nav-links {
    display: none;
  }
}

@media (max-width: 480px) {
  .hero {
    padding: 6rem 1rem 2rem;
  }

  .features {
    padding: 4rem 1rem;
  }

  .performance {
    padding: 4rem 1rem;
  }

  .download {
    padding: 4rem 1rem;
  }

  .section-title {
    font-size: 2rem;
  }
}

/* Smooth scrolling */
html {
  scroll-behavior: smooth;
}

/* Loading animation */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.feature-card,
.benchmark-card,
.download-card {
  animation: fadeInUp 0.6s ease-out;
}