/* Reset defaults */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
  }
  
  /* Layout */
  body {
    background-color: #fff;
    color: #000;
    font-family: 'Helvetica Neue', Arial, sans-serif;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 40px 20px;
    min-height: 100vh;
    line-height: 1.6;
  }
  
  /* Headings */
  h1 {
    font-size: 1.5rem;
    text-align: center;
    margin: 30px 0;
    color: #111;
    letter-spacing: 1px;
    font-weight: bold;
  }
  
  /* Video Container */
  .video-container {
    position: relative;
    width: 85%;
    max-width: 360px;
    height: 200px;
    margin: 20px 0;
    border: 2px solid #000;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 3px 6px rgba(0,0,0,0.1);
  }
  
  .video-container iframe {
    width: 100%;
    height: 100%;
    border: 0;
  }
  
  /* Paragraphs */
  p {
    max-width: 360px;
    font-size: 0.95rem;
    text-align: justify;
    color: #222;
    line-height: 1.5;
    margin-bottom: 30px;
  }
  
  /* Links */
  a {
    color: #000;
    text-decoration: none;
    position: relative;
    padding: 2px 0;
    transition: color 0.3s ease;
  }
  
  a::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: -2px;
    width: 100%;
    height: 1px;
    background-color: #000;
    transform: scaleX(0);
    transition: transform 0.3s ease;
    transform-origin: right;
  }
  
  a:hover {
    color: #555;
  }
  
  a:hover::after {
    transform: scaleX(1);
    transform-origin: left;
  }
  
  /* ----- Responsive design (mobile first) ----- */
  
  /* Medium devices (tablets) */
  @media (min-width: 768px) {
    h1 {
      font-size: 2rem;
    }
  
    .video-container {
      width: 65%;
      max-width: 480px;
      height: 270px;
    }
  
    p {
      max-width: 480px;
      font-size: 1rem;
    }
  }
  
  /* Large devices (desktop) */
  @media (min-width: 1200px) {
    h1 {
      font-size: 2.3rem;
    }
  
    .video-container {
      max-width: 560px;
      height: 315px; /* 16:9 */
    }
  
    p {
      max-width: 560px;
      font-size: 1.1rem;
    }
  }