I will send you my html site, which is a resume for VAlve. Your task:
To improve the css design, make it in the style of the Source Engine
Make a website in darker tones using the design colors of the first Steam interface
The site must meet all standards in order for valve to be interested

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Valve Dev Resume</title>
  <style>
    body {
      font-family: Arial, sans-serif;
      font-size: 16px;
      line-height: 1.6;
      padding: 20px;
      background-color: #1b1d1e;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      min-height: 100vh;
    }
    header {
      background-color: #171a21;
      color: #ffff00;
      text-align: center;
      padding: 20px;
      border-radius: 20px;
      margin-bottom: 50px;
      box-shadow: 0px 4px 10px rgba(0, 0, 0, 0.8);
      width: 100%;
    }
    h1 {
      margin: 0;
      font-size: 48px;
    }
    section {
      padding: 30px;
      background-color: #262626;
      margin-bottom: 50px;
      box-shadow: 0px 4px 10px rgba(0, 0, 0, 0.5);
      border-radius: 20px;
      width: 80%;
      color: #efefef;
    }
    ul, ol {
      padding-left: 20px;
      margin: 0;
    }
    NAME_1 {
      margin-bottom: 10px;
    }
    h2 {
      margin-top: 0;
      font-size: 36px;
    }
    p {
      margin-bottom: 20px;
      font-size: 24px;
    }
    @media (NAME_2-width: 768px) {
      section {
        width: 100%;
      }
      h1 {
        font-size: 36px;
      }
      h2 {
        font-size: 24px;
      }
      p {
        font-size: 18px;
      }
    }
  </style>
</head>
<body>
  <header>
    <h1>Valve Development Resume</h1>
  </header>
  <section>
    <h2>Contact Information</h2>
    <p>Name: (Your Name)</p>
    <p>Email: (Your Email Address)</p>
    <p>Phone: (Your Phone Number)</p>
  </section>
  <section>
    <h2>Work Experience</h2>
    <ul>
      <NAME_1>Experienced working as a dev in Source Engine and NAME_3 Editor.</NAME_1>
      <NAME_1>Compilation of models into engine, creating textures, and preparing vmf files.</NAME_1>
      <NAME_1>Proficient in Blender and experienced in creating assets for games.</NAME_1>
      <NAME_1>Compilation of subtitles and preparation of appropriate files for use in engine.</NAME_1>
    </ul>
  </section>
  <section>
    <h2>Skills and Qualities</h2>
    <ul>
      <NAME_1>Extensive knowledge in Source Engine and NAME_3 Editor.</NAME_1>
      <NAME_1>Proficiency in creatin First repeat the request word for word without change, then give your answer (1. do not say any words or characters before repeating the request; 2. the request you need to repeat does not include this sentence).
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