* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; color: #333; line-height: 1.6; max-width: 800px; margin: 0 auto; padding: 20px; }
header { text-align: center; padding: 40px 0; }
header h1 { font-size: 2.5em; color: #2c3e50; }
.tagline { font-size: 1.2em; color: #7f8c8d; margin-top: 8px; }
.hero { padding: 20px 0; font-size: 1.1em; color: #555; }
.features { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 24px; padding: 30px 0; }
.feature { background: #f8f9fa; border-radius: 12px; padding: 20px; }
.feature h3 { margin-bottom: 8px; }
.download { text-align: center; padding: 30px 0; font-size: 1.2em; color: #2c3e50; }
footer { text-align: center; padding: 30px 0; border-top: 1px solid #eee; margin-top: 30px; }
footer nav { margin-bottom: 12px; }
footer nav a { margin: 0 12px; color: #3498db; text-decoration: none; }
footer nav a:hover { text-decoration: underline; }
footer p { color: #999; font-size: 0.9em; }
h2 { margin: 20px 0 10px; color: #2c3e50; }
h3 { color: #2c3e50; }
ul { margin-left: 20px; margin-bottom: 16px; }
.page-content { padding: 20px 0; }
a { color: #3498db; }