:root {
    --primary: #0f2027;
    --secondary: #203a43;
    --accent: #ff7e5f;
    --light: rgba(255,255,255,0.1);
    --text: #ffffff;
    --font-main: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  }

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

  body {
    background: linear-gradient(135deg, var(--primary), var(--secondary), #2c5364);
    color: var(--text);
    font-family: var(--font-main);
    line-height: 1.6;
    padding: 20px;
    max-width: 1200px;
    margin: 0 auto;
  }

  .design-notice {
    background: rgba(0,0,0,0.3);
    padding: 15px;
    border-radius: 8px;
    margin-bottom: 30px;
    text-align: center;
    font-size: 14px;
    border: 1px solid rgba(255,255,255,0.1);
  }

  article {
    background: rgba(0,0,0,0.2);
    border-radius: 15px;
    padding: 30px;
    margin-bottom: 40px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.3);
  }

  h2 {
    font-size: 32px;
    margin-bottom: 25px;
    background: linear-gradient(90deg, var(--accent), #feb47b);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    text-shadow: 0 2px 10px rgba(0,0,0,0.2);
  }

  h3 {
    font-size: 24px;
    margin: 30px 0 15px;
    color: var(--accent);
    position: relative;
    padding-left: 15px;
  }

  h3::before {
    content: '';
    position: absolute;
    left: 0;
    top: 5px;
    height: 70%;
    width: 4px;
    background: var(--accent);
    border-radius: 2px;
  }

  p {
    margin-bottom: 20px;
    font-size: 17px;
  }

  pre {
    background: rgba(0,0,0,0.3);
    border-radius: 8px;
    padding: 20px;
    margin: 25px 0;
    overflow-x: auto;
    border-left: 4px solid var(--accent);
    box-shadow: inset 0 0 10px rgba(0,0,0,0.2);
  }

  code {
    font-family: 'Courier New', monospace;
    color: #f8f8f2;
    font-size: 15px;
  }

  .image-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
    margin: 30px 0;
  }

  .decorative-img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.3);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
  }

  .decorative-img:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0,0,0,0.4);
  }

  .btn-primary {
    background-color: var(--accent);
    border: none;
    padding: 12px 25px;
    color: white;
    border-radius: 6px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: inline-block;
    margin: 10px 0;
    box-shadow: 0 4px 10px rgba(255,126,95,0.3);
  }

  .btn-primary:hover {
    background-color: #feb47b;
    transform: translateY(-2px);
    box-shadow: 0 6px 15px rgba(255,126,95,0.4);
  }

  .nav-tabs {
    display: flex;
    margin-bottom: 30px;
    background: rgba(0,0,0,0.3);
    border-radius: 8px;
    overflow: hidden;
  }

  .nav-tab {
    padding: 15px 25px;
    color: var(--text);
    text-decoration: none;
    transition: all 0.3s ease;
    position: relative;
    font-weight: 600;
  }

  .nav-tab:hover {
    background: rgba(255,255,255,0.1);
  }

  .nav-tab.active {
    background: var(--accent);
  }

  .nav-tab.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 0;
    border-left: 10px solid transparent;
    border-right: 10px solid transparent;
    border-bottom: 10px solid rgba(0,0,0,0.2);
  }

  @media (max-width: 768px) {
    body {
      padding: 15px;
    }
    
    h2 {
      font-size: 26px;
    }
    
    h3 {
      font-size: 20px;
    }
    
    .nav-tabs {
      flex-direction: column;
    }
    
    .image-grid {
      grid-template-columns: 1fr;
    }
  }