"`html body { font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif; line-height: 1.6; color: #333; margin: 0; padding: 0; background-color: #f9f9f9; }. container { max-width: 900px; margin: 20px auto; background: #fff; padding: 40px; border-radius: 12px; box-shadow: 0 4px 20px rgba(0,0,0,0.05); }.
