I'm trying to center text using CSS and HTML. I'm very new to web development so I'm just getting started. I watched the basics course (made the first page) and now I'm working on my own project (other pages)

* {
  padding: 0;
  margin: 0;
  box-sizing: border-box;
}

html {
  /* font-size: 10px; */
  font-size: 62.5%
}

body {
  font-family: "Rubik", sans-serif;
  line-height: 1;
  font-weight: 400;
  color: #FFFFFF;
}

.second-page {
  background-color: #04041af9;
  padding: 4.8rem 0 9.6rem 0;
}

.our-news {
  max-width: 130rem;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 9.6rem;
  align-items: center;
}

.heading-secondary {
  font-size: 5.2rem;
  font-weight: 700;
  /*line-height: 1.05;*/
  align-items: center;
  text-align: center;
  color: #FFFFFF;
  letter-spacing: -0.5px;
  margin-bottom: 3.2rem;
}

<section class="second-page">
  <div class="our-news">
    <h1 class="heading-secondary">
      Why buy through us?
    </h1>
  </div>
</section>

But, it won't be centered at all! I spent hours researching it so I finally came here to ask for help. I've attached an image of what it looks like:

All I want is for it to appear in the center) - at least horizontally! How should I achieve this (note that this part is part two)? Thanks.