* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
  }
  body {
    background-color: #1a2238;
    color: #fff;
    font-family: Arial, sans-serif;
    line-height: 1.5;
    padding: 20px;
  }
  
  .outer-header {
    border: 2px solid #39ff14;
    padding: 2px;
    margin-bottom: 20px;
  }
  .inner-header {
    border: 2px solid #666;
    background-color: #232b39;
    text-align: center;
    padding: 12px;
  }
  .inner-header h1 {
    font-size: 1.8rem;
    letter-spacing: 1px;
  }
  .header-info {
    margin-top: 6px;
  }
  .header-info .module {
    display: block;
    color: #39ff14;
    font-style: italic;
    text-transform: lowercase;
  }
  .header-info .points {
    display: block;
    color: #fff;
    margin-top: 2px;
    font-size: 0.9rem;
  }

  .demo-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
  }
  
  .demo-box {
    background-color: #2a3150;
    border: 2px solid #ee28ae;
    border-radius: 8px;
    padding: 15px;
    height: 140px;
    position: relative;
    overflow: hidden;
  }
  .demo-box h3 {
    margin-bottom: 8px;
    font-size: 1.1rem;
  }
  .demo-box p {
    font-size: 0.9rem;
    color: #e0e0e0;
    line-height: 1.3;
  }
  .hover-transition {
    border-color: #ffcc00;
    transition: transform 0.3s, background-color 0.3s;
  }
  .hover-transition:hover {
    background-color: #3b4470;
    transform: scale(1.05);
  }
.z-index-demo {
    position: relative;
    padding-right: 140px;  
  }
  .z-index-demo .z-bar {
    position: absolute;
    width: 40px;
    height: 60px;
  }
  .z-index-demo .z-bar.red {
    background-color: crimson;
    top: 50px;     
    right: 80px;  
    z-index: 1;
  }
  .z-index-demo .z-bar.blue {
    background-color: royalblue;
    top: 30px;
    right: 50px;
    z-index: 2;
  }
  .rounded-corners {
    background-color: #8cdcef;
  }
  .box-shadow {
    background-color: #000;
    box-shadow: 0 0 12px rgba(255,255,255,0.6);
  }
  @import url('https://fonts.googleapis.com/css2?family=Pacifico&display=swap');
  .google-fonts {
    border-color: #39ff14;
  }
  .google-fonts h3 {
    font-family: 'Pacifico', cursive;
    color: #39ff14;
  }
  .position-demo {
    border-color: #39ff14;
  }
  .position-demo h3 {
    color: #39ff14;
  }
  .position-demo p {
    position: absolute;
    bottom: 10px;
    right: 10px;
    width: calc(100% - 25px);
  }