将网站的盒子定位在右侧的方法-PHP中文网问答

我在这里遇到了一个问题，我试图将一个盒子放在网站的右侧，但不知道为什么它不起作用，我尝试使用justify-content: flex-end;将盒子对齐到页面的“末尾”，然后添加padding-right为200px，但可惜这并不起作用。对于解释方面的任何帮助将不胜感激。

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
  }
  .container {
    width: 100%;
    height: 50vh;
    background-color: #1f2937;
    position: static;
    display: flex; 
    flex-direction: column; 
    justify-content: center; 
  }

 
  
  .footer {
    position: absolute;
    bottom: 0px;
    width: 100%;
    height: 10vh;
    background-color: #1f2937;
    color: white;
    text-align: center;
    display: flex;
    justify-content: center;
    align-items: center;
  }
  
  .logo {
    font-size: 24px;
    font-family: 'Times New Roman', Times, serif;
    color: white;
    justify-content: space-between;
    padding-top: 15px;
    font-family: 'Gill Sans', 'Gill Sans MT', Calibri, 'Trebuchet MS', sans-serif;
    padding-left: 200px;
    position: absolute; 
    top: 0;
  }
  
  .navbar {
    color:white;
    font-size: 18px;
    position: fixed;
    width: 85%;
    top: 0;
    right: 0;
    margin: auto;
    display: flex;
    align-items: center;
    justify-content: flex-end;
    flex-direction: row;
    padding-top: 15px;
    padding-right: 200px;
  }
  
  .navbar ul li {
    list-style: none;
    display: inline-block;
    margin: 0 20px; 
    text-decoration: none;
  }
  
  .text1 {
    position: relative;
    color: white;
    padding-left: 200px;
    font-size: 48px;
    font-weight: bold;
    width: 720px;
  }
  .text2{
    color: white;
    font-size: 18px;
    padding-left: 200px;
    width: 520px;
  }


  .text3{
    text-align: center;
    display:flex;
    align-items:center; /*vertical center*/
    justify-content:right; /*horizontal center*/
    width: 500px;
    height:350px;
    background-color: grey; 
  }

<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Website</title>
  <link href="style.css" rel="stylesheet">
</head>

<body>
  <div class="container">
    <div class="logo">
      <h2>Header Logo</h2>
    </div>
    <div class="navbar">
      <ul>
        <li><a href="index.html">header link one</a></li>
        <li><a href="index.html">header link two</a></li>
        <li><a href="index.html">header link three</a></li>
      </ul>
    </div>
    <div class="text1">
      <h2>This website is awesome</h2>
    </div>
    <div class="text2">This website has some subtext that goes here under the main title.It's a smaller font and the color is lower contrast</div>
    <div class="text3">this is a placeholder for an image</div>
  </div>
  <div class="footer">
    Copyright © The Odin Project 2023
  </div>

</body>

</html>

我尝试使用justify-content:flex-end来对齐它，但是我已经束手无策了，说实话，对于我的问题的解释将非常有帮助，我只包含了必要的CSS代码和整个HTML文件。提前感谢大家的帮助！