:root {
    --primary: #1e3c72;
    --secondary: #2a5298;
    --accent: #00c6ff;
    --text: #f8f9fa;
    --bg: #0a192f;
    --card-bg: rgba(30, 60, 114, 0.7);
    --neon: 0 0 10px rgba(0, 198, 255, 0.7);
  }

  @font-face {
    font-family: 'Montserrat';
    src: url('fonts/Montserrat-Regular.ttf') format('truetype');
  }

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

  body {
    font-family: 'Montserrat', sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    overflow-x: hidden;
    min-height: 100%;
    background-image: 
      radial-gradient(circle at 10% 20%, rgba(42, 82, 152, 0.3) 0%, transparent 20%),
      radial-gradient(circle at 90% 80%, rgba(0, 198, 255, 0.2) 0%, transparent 30%);
  }

  .container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
  }

  .header {
    text-align: center;
    padding: 40px 0;
    position: relative;
  }

  .header::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 200px;
    height: 3px;
    background: linear-gradient(90deg, transparent, var(--accent), transparent);
  }

  h1, h2, h3 {
    font-weight: 600;
    margin-bottom: 20px;
    background: linear-gradient(45deg, #00c6ff, #0072ff);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
  }

  h1 {
    font-size: 2.5rem;
    letter-spacing: 1px;
  }

  h2 {
    font-size: 2rem;
    margin-top: 40px;
    position: relative;
    padding-left: 20px;
  }

  h2::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    height: 80%;
    width: 5px;
    background: var(--accent);
    border-radius: 3px;
  }

  h3 {
    font-size: 1.5rem;
    margin-top: 30px;
  }

  p {
    margin-bottom: 20px;
    font-size: 1.1rem;
  }

  .grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(500px, 1fr));
    gap: 30px;
    margin: 40px 0;
  }

  .card {
    background: var(--card-bg);
    border-radius: 15px;
    padding: 30px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: transform 0.3s, box-shadow 0.3s;
  }

  .card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.4);
  }

  .img-container {
    display: flex;
    justify-content: center;
    margin: 30px 0;
    gap: 20px;
    flex-wrap: wrap;
  }

  .img-container img {
    width: 320px;
    height: 320px;
    border-radius: 15px;
    object-fit: cover;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
    transition: transform 0.3s, box-shadow 0.3s;
  }

  .img-container img:hover {
    transform: scale(1.05);
    box-shadow: 0 10px 25px rgba(0, 198, 255, 0.4);
  }

  pre {
    background: rgba(10, 25, 47, 0.8);
    border-radius: 10px;
    padding: 20px;
    margin: 20px 0;
    overflow: auto;
    border-left: 4px 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: var(--bg);
    padding: 2px 10px;
    border-radius: 0 0 0 5px;
    font-size: 0.8rem;
  }

  code {
    color: #7fdbff;
    font-family: 'Courier New', monospace;
  }

  .notice {
    background: rgba(0, 198, 255, 0.1);
    border-left: 4px solid var(--accent);
    padding: 20px;
    margin: 40px 0;
    border-radius: 0 5px 5px 0;
  }

  .notice p {
    margin: 0;
    font-size: 0.9rem;
  }

  .nav {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 100;
  }

  .nav a {
    color: var(--text);
    text-decoration: none;
    background: rgba(30, 60, 114, 0.7);
    padding: 10px 20px;
    border-radius: 30px;
    margin-left: 10px;
    transition: all 0.3s;
    backdrop-filter: blur(5px);
    border: 1px solid rgba(255, 255, 255, 0.1);
  }

  .nav a:hover {
    background: var(--accent);
    transform: translateY(-2px);
    box-shadow: var(--neon);
  }

  @media (max-width: 768px) {
    .grid {
      grid-template-columns: 1fr;
    }
    
    h1 {
      font-size: 2rem;
    }
    
    h2 {
      font-size: 1.5rem;
    }
    
    .img-container img {
      width: 100%;
      height: auto;
    }
    
    .nav {
      position: static;
      display: flex;
      justify-content: center;
      margin-bottom: 20px;
    }
    
    .nav a {
      margin: 0 5px;
    }
  }

  @keyframes float {
    0%, 100% {
      transform: translateY(0);
    }
    50% {
      transform: translateY(-10px);
    }
  }

  .floating {
    animation: float 3s ease-in-out infinite;
  }