body { font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif; margin: 0; background: #0d1117; color: #e5e7eb; }
header { background: #0b6e4f; color: #fff; padding: 16px 24px; }
header h1 { margin: 0 0 4px; font-size: 22px; }
main { padding: 16px; max-width: 1200px; margin: 0 auto; }
.card { background: #161b22; border: 1px solid #30363d; border-radius: 10px; box-shadow: none; padding: 16px; margin-bottom: 16px; }
.card h2 { margin-top: 0; color: #e5e7eb; }
.insight { background: #0f1623; border-left: 4px solid #2dd4bf; padding: 10px 12px; margin-top: 8px; font-size: 14px; color: #cbd5e1; }
footer { padding: 12px 16px; text-align: center; color: #94a3b8; }