/* body {
    font-family: Arial, sans-serif;
    margin: 20px;
}

#calculator {
    width: 300px;
    margin: 0 auto;
    padding: 20px;
    border: 1px solid #ccc;
    border-radius: 5px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

label {
    display: block;
    margin-bottom: 8px;
}

input {
    width: 100%;
    padding: 8px;
    margin-bottom: 16px;
    box-sizing: border-box;
}

button {
    background-color: #4caf50;
    color: white;
    padding: 10px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
}

button:hover {
    background-color: #45a049;
}
     */

     body {
        font-family: Arial, sans-serif;
        margin: 20px;
    }
    
    #calculator {
        width: 300px;
        margin: 0 auto;
        padding: 20px;
        border: 1px solid #ccc;
        border-radius: 5px;
        box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
    }
    
    label {
        display: block;
        margin-bottom: 8px;
    }
    
    input, select {
        width: 100%;
        padding: 8px;
        margin-bottom: 16px;
        box-sizing: border-box;
    }
    
    #densityInputs {
        display: flex;
        flex-direction: column;
        align-items: center;
    }
    
    #densityInputs input {
        width: calc(50% - 5px);
    }
    
    .fraction-line {
        border-top: 1px solid #000;
        margin: 0 5px;
        width: 100%;
    }
    
    button {
        background-color: #4caf50;
        color: white;
        padding: 10px;
        border: none;
        border-radius: 4px;
        cursor: pointer;
    }
    
    button:hover {
        background-color: #45a049;
    }