How can I center this piece of text?

Question

The piece of text, "We do photography and videography", must be centered. I tried using the text-align command and justifying the content to the center. I think that it must have something to do with the way I have positioned the whole body of the HTML file.

var i = 0, text;
text = "All your favorite memories in one film.";

function typing() {
  if(i < text.length) {
    document.getElementById("text").innerHTML += text.charAt(i);
    i++;
    setTimeout(typing, 50);
  }
}
typing();

* {
  margin: 0;
  padding: 0;
}

body {
  height: 100vh;
  width: 50vh;
  background-image: linear-gradient(rgba(68, 67, 67, 0.75), rgba(58, 58, 58, 0.75)), url(4kcamera.jpg);
  background-size: cover;
  background-position: center;
  text-align: center;
  justify-content: center;
}

nav {
  width: 100%;
  height: 80px;
  position: fixed;

}

.logo{
  float: left;
  padding: 0 30px;
  margin-left: 55px;
  margin-right: 30px;
  width: 50px;
  margin-top: 20px;
}

ul li {
  list-style: none;
  display: inline-block;
  line-height: 90px;
  padding: 0 31px;
}

ul {
  margin-left: 840px;
}

ul li a {
  text-decoration: none;
  font-size: 20px;
  font-family: 'Roboto Condensed', sans-serif;
  color: rgb(250, 250, 250);
}

ul li a:hover {
  color: rgb(102, 151, 241);
  transition-duration: 0.5s;
}

#text{ 
  transform: uppercase;
  color: white;
  font-family: 'Poppins', sans-serif;
  text-align: center;
  margin: 0;
  font-size: 60px;
}

#textAndButtonContainer {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  display: flex;
  flex-direction: column;
  justify-content: center;
  border: none;
}

.container {
  display: flex;
  justify-content: center;
}

#button1 {
  background-color: rgb(30, 109, 255);
  border: 2px;
  border-radius: 15px 50px;
  color: white;
  padding: 35px;
  margin: 22px;
  text-align: center;
  font-size: 13px;
  font-family: 'Poppins', Helvetica;
}

#button1:hover {
  background-color: rgb(19, 66, 165);
  color: white;
  transition-duration: 0.4s;
}

.apptmnt {
  position: absolute;
  top: 30%;
  left: 50%;
  transform: translate(-50%, -50%);
  display: flex;
  flex-direction: column;
  justify-content: center;
  border: none;
  font-family: 'Poppins', sans-serif;
  color: white; 
  font-size: 45px;
}

.apptmnt2 {
  position: absolute;
  top: 39%;
  left: 50%;
  transform: translate(-50%, -50%);
  display: flex;
  flex-direction: column;
  justify-content: center;
  border: none;
  font-family: 'Poppins', sans-serif;
  color: white;      
}

.pv {
  position: inherit;
  text-align: center;
}

<nav>
  <a href="index.html">
    <img class="logo" src="1 NA.png" width="50" height="50">
  </a>
  <ul>
    <li>
      <a href="index.html">Home</a>
    </li>
    <li>
      <a href="about.html">About Me</a>
    </li>
    <li>
      <a href="contacts.html">Contacts</a>
    </li>
    <li>
      <a href="portfolio.html">Portfolio</a>
    </li>
  </ul>
</nav>

<div id="textAndButtonContainer">
  <div id="text"></div>
  <div class="container">
    <a href="commence.html">
      <button id="button1">Get Started</button>
    </a>
  </div>
</div>

<h3 class="pv">We do photography and videography.</h3>

<link href="https://fonts.googleapis.com/css2?family=Roboto+Condensed:wght@300&display=swap" rel="stylesheet">
<link href="https://fonts.googleapis.com/css2?family=Quicksand:wght@600&family=Roboto+Condensed:wght@300&display=swap" rel="stylesheet">
<link href="https://fonts.googleapis.com/css2?family=Poppins:ital,wght@1,300&display=swap" rel="stylesheet">

Centering this piece of text in the most simple way would be great.

Answer 1

At first your CSS code is not in <style>...</style> style tags.

Next, your body { width: 50vh } CSS code restricts <h3> to align because of the small width. Remove it and then everything should work fine.

body {
    height: 100vh;
    background-image: linear-gradient(rgba(68, 67, 67, 0.75), rgba(58, 58, 58, 0.75)), url(4kcamera.jpg);
    background-size: cover;
    background-position: center;
    text-align: center;
    justify-content: center;
}