---
id: 620175b3710a0951cfa86edf
title: Step 42
challengeType: 0
dashedName: step-42
---

# --description--

La funzione `calc()` è una funzione CSS che consente di calcolare un valore sulla base di altri valori. Ad esempio, puoi usarlo per calcolare la larghezza della porta di visualizzazione meno il margine di un elemento:

```css
.example {
  margin: 10px;
  width: calc(100% - 20px);
}
```

Dai a `#years` una proprietà `margin` di `0 -2px` e un `padding` impostato su `0.5rem calc(1.25rem + 2px) 0.5rem 0`.

# --hints--

Il selettore `#years` dovrebbe avere una proprietà `margin` impostata a `0 -2px`.

```js
assert(new __helpers.CSSHelp(document).getStyle('#years')?.getPropertyValue('margin') === '0px -2px');
```

Il selettore `#years` dovrebbe avere una proprietà `padding` impostata su `0.5rem calc(1.25rem + 2px) 0.5rem 0`.

```js
const padding = new __helpers.CSSHelp(document).getStyle('#years')?.getPropertyValue('padding');
assert(['0.5rem calc(1.25rem + 2px) 0.5rem 0px', '0.5rem calc(2px + 1.25rem) 0.5rem 0px'].includes(padding));
```

# --seed--

## --seed-contents--

```html
<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Balance Sheet</title>
    <link rel="stylesheet" href="./styles.css">
  </head>
  <body>
    <main>
      <section>
        <h1>
          <span class="flex">
            <span>AcmeWidgetCorp</span>
            <span>Balance Sheet</span>
          </span>
        </h1>
        <div id="years" aria-hidden="true">
          <span class="year">2019</span>
          <span class="year">2020</span>
          <span class="year">2021</span>
        </div>
        <div class="table-wrap">
          <table>
            <caption>Assets</caption>
            <thead>
              <tr>
                <td></td>
                <th><span class="sr-only year">2019</span></th>
                <th><span class="sr-only year">2020</span></th>
                <th class="current"><span class="sr-only year">2021</span></th>
              </tr>
            </thead>
            <tbody>
              <tr class="data">
                <th>Cash <span class="description">This is the cash we currently have on hand.</span></th>
                <td>$25</td>
                <td>$30</td>
                <td class="current">$28</td>
              </tr>
              <tr class="data">
                <th>Checking <span class="description">Our primary transactional account.</span></th>
                <td>$54</td>
                <td>$56</td>
                <td class="current">$53</td>
              </tr>
              <tr class="data">
                <th>Savings <span class="description">Funds set aside for emergencies.</span></th>
                <td>$500</td>
                <td>$650</td>
                <td class="current">$728</td>
              </tr>
              <tr class="total">
                <th>Total <span class="sr-only">Assets</span></th>
                <td>$579</td>
                <td>$736</td>
                <td class="current">$809</td>
              </tr>
            </tbody>
          </table>
          <table>
            <caption>Liabilities</caption>
            <thead>
              <tr>
              <td></td>
              <th><span class="sr-only">2019</span></th>
              <th><span class="sr-only">2020</span></th>
              <th><span class="sr-only">2021</span></th>
              </tr>
            </thead>
            <tbody>
              <tr class="data">
                <th>Loans <span class="description">The outstanding balance on our startup loan.</span></th>
                <td>$500</td>
                <td>$250</td>
                <td class="current">$0</td>
              </tr>
              <tr class="data">
                <th>Expenses <span class="description">Annual anticipated expenses, such as payroll.</span></th>
                <td>$200</td>
                <td>$300</td>
                <td class="current">$400</td>
              </tr>
              <tr class="data">
                <th>Credit <span class="description">The outstanding balance on our credit card.</span></th>
                <td>$50</td>
                <td>$50</td>
                <td class="current">$75</td>
              </tr>
              <tr class="total">
                <th>Total <span class="sr-only">Liabilities</span></th>
                <td>$750</td>
                <td>$600</td>
                <td class="current">$475</td>
              </tr>
            </tbody>
          </table>
          <table>
            <caption>Net Worth</caption>
            <thead>
              <tr>
              <td></td>
              <th><span class="sr-only">2019</span></th>
              <th><span class="sr-only">2020</span></th>
              <th><span class="sr-only">2021</span></th>
              </tr>
            </thead>
            <tbody>
              <tr class="total">
                <th>Total <span class="sr-only">Net Worth</span></th>
                <td>$-171</td>
                <td>$136</td>
                <td class="current">$334</td>
              </tr>
            </tbody>
          </table>
        </div>
      </section>
    </main>
  </body>
</html>
```

```css
span[class~="sr-only"] {
  border: 0;
  clip: rect(1px, 1px, 1px, 1px);
  clip-path: inset(50%);
  height: 1px;
  width: 1px;
  position: absolute;
  overflow: hidden;
  white-space: nowrap;
  padding: 0;
  margin: -1px;
}

html {
  box-sizing: border-box;
}

body {
  font-family: sans-serif;
  color: #0a0a23;
}

h1 {
  max-width: 37.25rem;
  margin: 0 auto;
  padding: 1.5rem 1.25rem;
}

h1 .flex {
  display: flex;
  flex-direction: column-reverse;
  gap: 1rem;
}

h1 .flex span:first-of-type {
  font-size: 0.7em;
}

h1 .flex span:last-of-type {
  font-size: 1.2em;
}

section {
  max-width: 40rem;
  margin: 0 auto;
  border: 2px solid #d0d0d5;
}

--fcc-editable-region--
#years {
  display: flex;
  justify-content: flex-end;
  position: sticky;
  top: 0;
  background: #0a0a23;
  color: #fff;
}
--fcc-editable-region--
```
