:root { font-family: Arial, sans-serif; }
body { margin: 0; background: #f6f7f9; color: #1f2937; }
.container { max-width: 720px; margin: 64px auto; padding: 24px; background: #fff; border-radius: 8px; box-shadow: 0 1px 4px rgba(0,0,0,.08); }
h1 { margin-top: 0; }