@import url('https://fonts.googleapis.com/css2?family=Roboto+Mono:wght@700&display=swap');
  body, html {
    margin: 0;
    padding: 0;
    height: 100%;
    background: linear-gradient(135deg, #0f2027, #203a43, #2c5364);
    display: flex;
    justify-content: center;
    align-items: center;
    font-family: 'Roboto Mono', monospace;
    color: #00ffea;
    user-select: none;
  }
  .container {
    text-align: center;
    max-width: 600px;
    padding: 20px;
  }
  h1 {
    font-size: 4rem;
    margin-bottom: 1rem;
    letter-spacing: 0.15em;
    text-shadow: 0 0 10px #00ffeaff;
  }
  h2 {
    font-weight: normal;
    margin-bottom: 3rem;
    color: #00ffeaaa;
  }
  a.play-button {
    position: relative;
    display: inline-block;
    padding: 1rem 3rem;
    color: #00ffea;
    text-decoration: none;
    font-size: 1.8rem;
    font-weight: 700;
    border: 3px solid #00ffea;
    border-radius: 12px;
    box-shadow: 0 0 25px #00ffeaff;
    transition: color 0.25s ease, box-shadow 0.25s ease;
    overflow: hidden;
  }
  a.play-button::before, a.play-button::after {
    content: "";
    position: absolute;
    border: 3px solid #00ffea;
    border-radius: 12px;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    transition: transform 0.4s ease;
    pointer-events: none;
  }
  a.play-button::before {
    transform: scaleX(1) scaleY(1);
    z-index: -2;
  }
  a.play-button::after {
    transform: scaleX(1) scaleY(1);
    z-index: -1;
    opacity: 0.6;
  }
  a.play-button:hover {
    color: #000000;
    box-shadow: 0 0 40px #00ffea;
    background: #00ffea;
  }
  a.play-button:hover::before {
    transform: scaleX(1.1) scaleY(1.2);
  }
  a.play-button:hover::after {
    transform: scaleX(1.3) scaleY(1.4);
    opacity: 0;
  }
  @media(max-width: 480px) {
    h1 {
      font-size: 3rem;
    }
    a.play-button {
      font-size: 1.4rem;
      padding: 0.8rem 2.5rem;
    }
  }