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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
  line-height: 1.6;
  color: #1a1a1a;
  background: #fafafa;
}

.container {
  max-width: 1000px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Header */
header {
  background: #18181b;
  color: white;
  padding: 60px 0;
  text-align: center;
}

header h1 {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 10px;
}

header .tagline {
  font-size: 1.25rem;
  opacity: 0.9;
  margin-bottom: 20px;
}

.github-link {
  display: inline-block;
  color: white;
  text-decoration: none;
  border: 1px solid rgba(255,255,255,0.3);
  padding: 10px 20px;
  border-radius: 6px;
  transition: background 0.2s, border-color 0.2s;
}

.github-link:hover {
  background: rgba(255,255,255,0.1);
  border-color: rgba(255,255,255,0.5);
}

/* Main content */
main {
  padding: 60px 0;
}

/* Hero section */
.hero {
  text-align: center;
  margin-bottom: 80px;
}

.hero img {
  max-width: 100%;
  border-radius: 8px;
  box-shadow: 0 4px 20px rgba(0,0,0,0.1);
  margin-bottom: 20px;
}

.hero p {
  font-size: 1.1rem;
  color: #666;
  max-width: 600px;
  margin: 0 auto;
}

/* Feature sections */
.feature {
  display: flex;
  align-items: center;
  gap: 40px;
  margin-bottom: 80px;
}

.feature.reverse {
  flex-direction: row-reverse;
}

.feature-content {
  flex: 1;
}

.feature h2 {
  font-size: 1.5rem;
  margin-bottom: 15px;
  color: #18181b;
}

.feature p {
  color: #666;
}

.feature img {
  flex: 1;
  max-width: 55%;
  border-radius: 8px;
  box-shadow: 0 4px 20px rgba(0,0,0,0.1);
}

/* Footer */
footer {
  background: #f4f4f5;
  padding: 30px 0;
  text-align: center;
  color: #666;
}

footer a {
  color: #18181b;
}

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

  .feature,
  .feature.reverse {
    flex-direction: column;
  }

  .feature img {
    max-width: 100%;
  }
}