* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; color: #1a1a1a; background: #fafafa; line-height: 1.7; }
.container { max-width: 720px; margin: 0 auto; padding: 20px; }
header { padding: 20px 0; border-bottom: 1px solid #e5e5e5; }
header a { color: #1a1a1a; text-decoration: none; font-weight: 700; font-size: 1.2em; }
header a:hover { color: #2563eb; }
h1 { font-size: 2.2em; margin: 30px 0 15px; line-height: 1.3; }
h2 { font-size: 1.5em; margin: 30px 0 12px; }
h3 { font-size: 1.2em; margin: 24px 0 10px; }
p { margin: 12px 0; font-size: 1.05em; }
ul, ol { margin: 12px 0 12px 24px; }
li { margin: 6px 0; }
code { background: #f0f0f0; padding: 2px 6px; border-radius: 4px; font-size: 0.9em; }
pre { background: #1e1e1e; color: #f0f0f0; padding: 16px; border-radius: 8px; overflow-x: auto; margin: 16px 0; }
pre code { background: none; color: inherit; padding: 0; }
table { border-collapse: collapse; width: 100%; margin: 20px 0; }
th, td { border: 1px solid #ddd; padding: 10px 14px; text-align: left; }
th { background: #f5f5f5; font-weight: 700; }
blockquote { border-left: 4px solid #2563eb; padding-left: 16px; margin: 16px 0; color: #666; }
.cta { display: inline-block; background: #2563eb; color: white; padding: 14px 32px; border-radius: 8px; text-decoration: none; font-size: 1.1em; font-weight: 600; margin: 30px 0; }
.cta:hover { background: #1d4ed8; }
.meta { color: #888; font-size: 0.9em; margin-bottom: 20px; }
.back { color: #2563eb; text-decoration: none; display: inline-block; margin-bottom: 20px; }
.blog-list { list-style: none; margin: 30px 0; }
.blog-list li { padding: 16px 0; border-bottom: 1px solid #e5e5e5; }
.blog-list a { color: #1a1a1a; text-decoration: none; font-size: 1.2em; font-weight: 600; }
.blog-list a:hover { color: #2563eb; }
.blog-list .desc { color: #666; margin-top: 6px; font-size: 0.95em; }
footer { margin-top: 40px; padding: 20px 0; border-top: 1px solid #e5e5e5; color: #888; font-size: 0.85em; }