:root {
    --primary: #1E90FF;
    --secondary: #8A2BE2;
    --accent: #00FFFF;
    --text: #FFFFFF;
    --bg-dark: #0A0A2A;
    --card-bg: rgba(30, 144, 255, 0.1);
  }

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

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

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

  /* Header Styles */
  header {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    padding: 60px 0 100px;
    text-align: center;
    position: relative;
    overflow: hidden;
    clip-path: polygon(0 0, 100% 0, 100% 90%, 0 100%);
  }

  header::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('https://images.gptkong.com/demo/sample1.png') center/cover no-repeat;
    opacity: 0.1;
    z-index: 0;
  }

  .header-content {
    position: relative;
    z-index: 1;
  }

  h1 {
    font-family: 'Orbitron', sans-serif;
    font-size: 3.5rem;
    margin-bottom: 20px;
    text-shadow: 0 0 15px var(--accent);
    background: linear-gradient(to right, var(--accent), #FFFFFF);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
  }

  .tagline {
    font-size: 1.2rem;
    max-width: 800px;
    margin: 0 auto 40px;
    position: relative;
  }

  .tagline::before, .tagline::after {
    content: '';
    position: absolute;
    width: 100px;
    height: 2px;
    background: var(--accent);
    top: 50%;
  }

  .tagline::before { left: -120px; }
  .tagline::after { right: -120px; }

  /* Navigation */
  nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(10, 10, 42, 0.9);
    backdrop-filter: blur(10px);
    z-index: 1000;
    padding: 15px 0;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.3);
  }

  .nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
  }

  .nav-logo {
    font-family: 'Orbitron', sans-serif;
    font-size: 1.5rem;
    color: var(--accent);
    text-decoration: none;
  }

  .nav-links {
    display: flex;
    gap: 30px;
  }

  .nav-links a {
    color: var(--text);
    text-decoration: none;
    font-size: 1rem;
    position: relative;
    transition: all 0.3s ease;
  }

  .nav-links a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent);
    transition: width 0.3s ease;
  }

  .nav-links a:hover {
    color: var(--accent);
  }

  .nav-links a:hover::after {
    width: 100%;
  }

  /* Main Content */
  main {
    position: relative;
    z-index: 1;
    margin-top: -50px;
  }

  .section {
    background: rgba(10, 10, 42, 0.7);
    border-radius: 15px;
    padding: 40px;
    margin-bottom: 50px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    position: relative;
    overflow: hidden;
  }

  .section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 5px;
    height: 100%;
    background: linear-gradient(to bottom, var(--primary), var(--secondary));
  }

  h2 {
    font-family: 'Orbitron', sans-serif;
    font-size: 2rem;
    margin-bottom: 20px;
    color: var(--accent);
    position: relative;
    display: inline-block;
  }

  h2::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 0;
    width: 50%;
    height: 3px;
    background: var(--accent);
    border-radius: 3px;
  }

  h3 {
    font-family: 'Orbitron', sans-serif;
    font-size: 1.5rem;
    margin: 30px 0 15px;
    color: var(--primary);
  }

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

  /* Code Blocks */
  pre {
    background: rgba(0, 0, 0, 0.3);
    border-left: 3px solid var(--accent);
    border-radius: 5px;
    padding: 20px;
    margin: 20px 0;
    overflow-x: auto;
    font-family: 'Courier New', monospace;
    position: relative;
  }

  pre::before {
    content: 'CSS';
    position: absolute;
    top: 0;
    right: 0;
    background: var(--accent);
    color: #000;
    padding: 2px 10px;
    font-size: 0.8rem;
    border-bottom-left-radius: 5px;
  }

  code {
    color: var(--accent);
    font-family: 'Courier New', monospace;
  }

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

  .gallery-item {
    border-radius: 10px;
    overflow: hidden;
    position: relative;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
    transition: transform 0.3s ease;
  }

  .gallery-item:hover {
    transform: translateY(-10px);
  }

  .gallery-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
  }

  .gallery-item:hover img {
    transform: scale(1.1);
  }

  /* Cards */
  .cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin: 40px 0;
  }

  .card {
    background: var(--card-bg);
    border-radius: 15px;
    padding: 30px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    border: 1px solid rgba(138, 43, 226, 0.3);
  }

  .card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.3);
    border-color: var(--accent);
  }

  .card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 5px;
    background: linear-gradient(to right, var(--primary), var(--secondary));
  }

  /* Footer */
  footer {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    padding: 50px 0 30px;
    text-align: center;
    margin-top: 100px;
    clip-path: polygon(0 10%, 100% 0, 100% 100%, 0 100%);
  }

  .footer-content {
    max-width: 800px;
    margin: 0 auto;
  }

  .footer-links {
    display: flex;
    justify-content: center;
    gap: 30px;
    margin: 30px 0;
  }

  .footer-links a {
    color: var(--text);
    text-decoration: none;
    transition: color 0.3s ease;
  }

  .footer-links a:hover {
    color: var(--accent);
  }

  .copyright {
    margin-top: 30px;
    font-size: 0.9rem;
    opacity: 0.8;
  }

  /* Animations */
  @keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-20px); }
  }

  .floating {
    animation: float 6s ease-in-out infinite;
  }

  /* Responsive */
  @media (max-width: 768px) {
    h1 { font-size: 2.5rem; }
    .tagline::before, .tagline::after { display: none; }
    .nav-links { gap: 15px; }
    .section { padding: 30px 20px; }
    .cards, .gallery { grid-template-columns: 1fr; }
  }

  /* Special Notice */
  .notice {
    background: rgba(0, 255, 255, 0.1);
    border: 1px solid var(--accent);
    border-radius: 5px;
    padding: 15px;
    margin: 30px 0;
    text-align: center;
    font-size: 0.9rem;
  }