body { font-family: Arial, sans-serif; line-height: 1.5; margin: 40px; } h1, h2, h3 { margin-top: 1.4em; } figure { margin: 20px 0; text-align: center; } .placeholder { width: 300px; height: 150px; background: #e0e0e0; border: 1px solid #aaa; display: inline-block; line-height: 150px; color: #555; font-size: 14px; } .page-break { page-break-after: always; margin-top: 40px; } .hint { font-style: italic; color: #555; } CUBE