<main>
  <article>
    <header><h1>Page Title</h1></header>
    <section aria-labelledby="features-heading">
      <h2 id="features-heading">Features</h2>
      <ul><li>Feature 1</li></ul>
    </section>
    <aside aria-label="Related content">...</aside>
  </article>
</main>

// Icon-only button
<button aria-label="Save document">
  <svg aria-hidden="true">...</svg>
</button>

// Form field with error
<input
  id="email"
  aria-required="true"
  aria-invalid={!!error}
  aria-describedby={error ? "email-error" : "email-hint"}
/>
{error && <p id="email-error" role="alert">{error}</p>}

:root {
  --text-primary: #1a1a1a;   /* 16.1:1 on white - normal text */
  --text-secondary: #595959; /* 7.0:1 on white - secondary */
  --focus-ring: #0052cc;     /* 7.3:1 - focus indicator */
}
:focus-visible {
  outline: 3px solid var(--focus-ring);
  outline-offset: 2px;
}