/* source: problem\problem7.htm style block 1 */
body { font-family: Arial, sans-serif; margin: 20px; }
    img { width: min(320px, 80vw); height: auto; }
    .opgave { margin: 20px 0; padding: 15px; border: 1px solid #ddd; border-radius: 8px; background-color: #f9f9f9; }
    .formula-box { padding: 10px; margin: 10px 0; border: 1px solid #ccc; border-radius: 8px; background-color: #fefefe; font-family: 'Courier New', monospace; }
    .action-buttons { margin: 10px 0; }
    button { margin: 10px 5px; padding: 10px 15px; font-size: 16px; background-color: #4CAF50; color: white; border: none; border-radius: 5px; cursor: pointer; }
    button:hover { background-color: #45a049; }
    .mellemregning { margin-top: 10px; padding: 10px; background-color: #eef; border-radius: 8px; display: none; }