@import url('https://fonts.googleapis.com/css2?family=Montserrat:wght@400;600;700&family=Roboto:wght@300;400;500&display=swap');
  
  :root {
    --primary: #1e3c72;
    --secondary: #2a5298;
    --accent: #ff9800;
    --highlight: #1abc9c;
    --dark: #2c3e50;
    --darker: #34495e;
    --light: #ecf0f1;
    --gradient: linear-gradient(135deg, var(--primary), var(--secondary));
  }
  
  * {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
  }
  
  body {
    font-family: 'Roboto', sans-serif;
    color: var(--light);
    background: var(--gradient);
    line-height: 1.6;
    overflow-x: hidden;
  }
  
  .container {
    max-width: 1200px;
    margin: 80px auto 40px;
    padding: 0 20px;
  }
  
  .design-notice {
    position: fixed;
    top: 10px;
    right: 10px;
    background-color: rgba(44, 62, 80, 0.9);
    color: var(--accent);
    padding: 8px 15px;
    border-radius: 20px;
    font-size: 14px;
    z-index: 1001;
    box-shadow: 0 2px 10px rgba(0,0,0,0.2);
  }
  
  .navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: rgba(44, 62, 80, 0.95);
    display: flex;
    justify-content: center;
    padding: 15px 0;
    z-index: 1000;
    backdrop-filter: blur(5px);
  }
  
  .nav-links {
    display: flex;
    gap: 30px;
    list-style: none;
  }
  
  .nav-links a {
    color: var(--light);
    text-decoration: none;
    font-family: 'Montserrat', sans-serif;
    font-weight: 600;
    font-size: 16px;
    transition: all 0.3s ease;
    position: relative;
  }
  
  .nav-links a:after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: -5px;
    left: 0;
    background-color: var(--highlight);
    transition: width 0.3s ease;
  }
  
  .nav-links a:hover {
    color: var(--highlight);
  }
  
  .nav-links a:hover:after {
    width: 100%;
  }
  
  article {
    background-color: rgba(44, 62, 80, 0.8);
    border-radius: 15px;
    padding: 40px;
    margin-bottom: 40px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
  }
  
  article h2 {
    font-family: 'Montserrat', sans-serif;
    font-size: 32px;
    margin-bottom: 30px;
    color: var(--highlight);
    text-align: center;
    position: relative;
    padding-bottom: 15px;
  }
  
  article h2:after {
    content: '';
    position: absolute;
    width: 100px;
    height: 3px;
    background: var(--accent);
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    border-radius: 3px;
  }
  
  article h3 {
    font-family: 'Montserrat', sans-serif;
    font-size: 24px;
    margin: 30px 0 20px;
    color: var(--light);
    position: relative;
    padding-left: 15px;
  }
  
  article h3:before {
    content: '';
    position: absolute;
    left: 0;
    top: 5px;
    height: 70%;
    width: 4px;
    background: var(--accent);
    border-radius: 2px;
  }
  
  article p {
    margin-bottom: 20px;
    font-size: 17px;
    line-height: 1.7;
  }
  
  pre {
    background-color: var(--darker);
    border-radius: 8px;
    padding: 20px;
    margin: 25px 0;
    overflow: hidden;
    position: relative;
    border-left: 4px solid var(--accent);
  }
  
  pre:before {
    content: 'CSS';
    position: absolute;
    top: 0;
    right: 0;
    background: var(--accent);
    color: var(--dark);
    padding: 3px 10px;
    font-size: 12px;
    font-weight: bold;
    border-bottom-left-radius: 5px;
  }
  
  code {
    font-family: 'Roboto Mono', monospace;
    font-size: 15px;
    color: var(--light);
    white-space: pre-wrap;
  }
  
  .gallery {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
    margin: 30px 0;
  }
  
  .gallery img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.2);
    transition: all 0.3s ease;
  }
  
  .gallery img:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0,0,0,0.3);
  }
  
  .card {
    background-color: var(--darker);
    border-radius: 10px;
    padding: 25px;
    margin: 20px 0;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
    transition: all 0.3s ease;
    border-left: 5px solid var(--highlight);
  }
  
  .card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0,0,0,0.2);
  }
  
  .floating-btn {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 60px;
    height: 60px;
    background: var(--accent);
    color: white;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 24px;
    box-shadow: 0 4px 10px rgba(0,0,0,0.2);
    cursor: pointer;
    z-index: 100;
    transition: all 0.3s ease;
  }
  
  .floating-btn:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 15px rgba(0,0,0,0.3);
  }
  
  @media (max-width: 768px) {
    .container {
      margin-top: 70px;
    }
    
    .nav-links {
      gap: 15px;
    }
    
    article {
      padding: 25px;
    }
    
    article h2 {
      font-size: 28px;
    }
    
    article h3 {
      font-size: 22px;
    }
    
    .gallery {
      grid-template-columns: 1fr;
    }
  }