:root {
    --primary: linear-gradient(135deg, #1e3c72 0%, #2a5298 70%);
    --secondary: linear-gradient(45deg, #6a11cb 25%, #2575fc);
    --accent: #5A9;
    --text: rgba(255,255,255,0.9);
    --card-bg: rgba(255,255,255,0.1);
    --transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.1);
  }

  * {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
  }

  body {
    font-family: 'Roboto', sans-serif;
    background: var(--primary);
    color: var(--text);
    line-height: 1.6;
    overflow-x: hidden;
  }

  .wrapper {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
  }

  .design-notice {
    background: rgba(0,0,0,0.3);
    padding: 1rem;
    text-align: center;
    border-radius: 8px;
    margin-bottom: 3rem;
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.1);
    backdrop-filter: blur(5px);
    border: 1px solid rgba(255,255,255,0.1);
  }

  .hero {
    position: relative;
    padding: 4rem 0;
    margin-bottom: 3rem;
    text-align: center;
  }

  .hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at 50% 50%, rgba(90, 169, 255, 0.2) 0%, transparent 70%);
    z-index: -1;
    animation: pulse 8s ease infinite;
  }

  @keyframes pulse {
    0%, 100% { opacity: 0.5; transform: scale(1); }
    50% { opacity: 0.8; transform: scale(1.05); }
  }

  h1, h2, h3, h4 {
    font-weight: 700;
    margin-bottom: 1.5rem;
    line-height: 1.3;
  }

  h1 {
    font-size: 2.5rem;
    background: linear-gradient(90deg, #fff, #5A9);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    text-shadow: 0 2px 10px rgba(0,0,0,0.2);
  }

  h2 {
    font-size: 1.8rem;
    color: #fff;
    position: relative;
    padding-bottom: 0.5rem;
  }

  h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 50px;
    height: 3px;
    background: var(--accent);
    border-radius: 3px;
  }

  h3 {
    font-size: 1.4rem;
    margin-top: 2rem;
    color: rgba(255,255,255,0.9);
  }

  p {
    margin-bottom: 1.5rem;
    font-size: 1.1rem;
    color: rgba(255,255,255,0.8);
  }

  article {
    background: rgba(0,0,0,0.2);
    backdrop-filter: blur(10px);
    border-radius: 16px;
    padding: 3rem;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    border: 1px solid rgba(255,255,255,0.1);
    margin-bottom: 3rem;
  }

  .grid-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(500px, 1fr));
    gap: 2rem;
    margin: 2rem 0;
  }

  .card {
    background: var(--card-bg);
    border-radius: 12px;
    padding: 2rem;
    transition: var(--transition);
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    border: 1px solid rgba(255,255,255,0.05);
  }

  .card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 30px rgba(0,0,0,0.2);
    border-color: rgba(90, 169, 255, 0.3);
  }

  .image-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 1.5rem;
    margin: 2rem 0;
  }

  .decor-img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    border-radius: 8px;
    transition: var(--transition);
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
  }

  .decor-img:hover {
    transform: scale(1.03);
    box-shadow: 0 8px 25px rgba(90, 169, 255, 0.3);
  }

  pre {
    background: rgba(0,0,0,0.3);
    border-radius: 8px;
    padding: 1.5rem;
    overflow-x: auto;
    margin: 2rem 0;
    border-left: 3px solid var(--accent);
    font-family: 'Courier New', monospace;
    font-size: 0.9rem;
    line-height: 1.5;
    position: relative;
  }

  pre::before {
    content: 'CSS';
    position: absolute;
    top: 0;
    right: 0;
    background: var(--accent);
    color: white;
    padding: 0.2rem 0.8rem;
    font-size: 0.8rem;
    border-radius: 0 0 0 8px;
  }

  code {
    font-family: 'Courier New', monospace;
    background: rgba(0,0,0,0.2);
    padding: 0.2rem 0.4rem;
    border-radius: 4px;
    font-size: 0.9rem;
  }

  table {
    width: 100%;
    border-collapse: collapse;
    margin: 2rem 0;
    background: rgba(0,0,0,0.2);
    border-radius: 8px;
    overflow: hidden;
  }

  th, td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid rgba(255,255,255,0.1);
  }

  th {
    background: rgba(90, 169, 255, 0.1);
    font-weight: 600;
  }

  tr:hover {
    background: rgba(90, 169, 255, 0.05);
  }

  .nav-links {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin: 2rem 0;
    flex-wrap: wrap;
  }

  .nav-link {
    padding: 0.8rem 1.5rem;
    background: rgba(90, 169, 255, 0.1);
    border-radius: 50px;
    transition: var(--transition);
    text-decoration: none;
    color: white;
    font-weight: 500;
    border: 1px solid rgba(90, 169, 255, 0.3);
  }

  .nav-link:hover {
    background: rgba(90, 169, 255, 0.3);
    transform: translateY(-2px);
  }

  .aurora-effect {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: -1;
    opacity: 0.3;
  }

  .aurora-layer {
    position: absolute;
    width: 100%;
    height: 100%;
    background: linear-gradient(270deg, rgba(26,115,232,0.7), rgba(26,115,232,0));
    animation: auroraMove 15s ease infinite;
  }

  @keyframes auroraMove {
    0% { transform: translateX(-10%) skewX(-10deg); opacity: 0.3; }
    50% { transform: translateX(10%) skewX(10deg); opacity: 0.5; }
    100% { transform: translateX(-10%) skewX(-10deg); opacity: 0.3; }
  }

  @media (max-width: 768px) {
    .wrapper {
      padding: 1rem;
    }
    
    article {
      padding: 1.5rem;
    }
    
    .grid-container {
      grid-template-columns: 1fr;
    }
    
    h1 {
      font-size: 2rem;
    }
    
    h2 {
      font-size: 1.5rem;
    }
  }