.formula-set {
        background-color: #ffffff;
        border: 1px solid #ddd;
        padding: 20px;
        margin-bottom: 10px;
    }
    .formula {
        margin-bottom: 10px;
    }
    .formula-header {
        font-size: 18px;
        color: #333;
        margin-bottom: 5px;
    }
    .formula-description {
        margin-bottom: 10px;
        font-size: 16px;
        color: #666;
    }
    .formula-code {
        background-color: #e1e1e1;
        border: none;
        padding: 10px 15px;
        font-family: monospace;
        color: #333;
        width: calc(100% - 30px);
        box-sizing: border-box;
        margin-bottom: 5px;
    }
    .copy-button {
        background-color: #000;
        color: #fff;
        padding: 10px 20px;
        font-size: 14px;
        border: none;
        cursor: pointer;
        display: inline-block;
    }
    .copy-success {
        background-color: #4CAF50; /* Green background on successful copy */
    }