body { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif; line-height: 1.6; color: #333; max-width: 800px; margin: 0 auto; padding: 20px; background: #fdfdfd; }
header { border-bottom: 1px solid #eee; padding-bottom: 10px; margin-bottom: 30px; }
footer { margin-top: 50px; border-top: 1px solid #eee; padding-top: 20px; font-size: 0.8em; color: #777; }
h1 { color: #111; }
.hero { text-align: center; padding: 50px 0; }
.cta { margin-top: 30px; }
.btn { display: inline-block; padding: 10px 20px; border-radius: 5px; text-decoration: none; font-weight: bold; margin: 0 10px; }
.primary { background: #111; color: #fff; }
.secondary { background: #eee; color: #111; }
nav a { text-decoration: none; color: #111; margin-right: 10px; }

.stack { display: grid; gap: 12px; max-width: 620px; }
input, textarea, select { width: 100%; padding: 10px; border: 1px solid #ccc; border-radius: 6px; }
.card { padding: 14px; border: 1px solid #eee; border-radius: 8px; background: #fff; }
code { background: #f2f2f2; padding: 2px 6px; border-radius: 4px; }