:root {
    --primary-color: #121212;
    --secondary-color: #1E1E1E;
    --accent-color: #FFD700;
    --highlight-color: #00FF7F;
    --text-color: #FFFFFF;
    --border-radius: 12px;
    --box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
    --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
  }

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

  body {
    background: radial-gradient(circle at center, #1A1A1A, #0D0D0D);
    color: var(--text-color);
    font-family: 'Roboto', sans-serif;
    line-height: 1.6;
    padding: 0;
    margin: 0;
    overflow-x: hidden;
  }

  .container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 40px 20px;
  }

  .header {
    text-align: center;
    margin-bottom: 60px;
    position: relative;
  }

  .header::after {
    content: "";
    display: block;
    width: 150px;
    height: 4px;
    background: linear-gradient(90deg, var(--accent-color), var(--highlight-color));
    margin: 20px auto;
    border-radius: 2px;
  }

  h1, h2, h3, h4 {
    font-weight: 700;
    margin-bottom: 20px;
    line-height: 1.3;
  }

  h1 {
    font-size: 2.8rem;
    background: linear-gradient(90deg, var(--accent-color), var(--highlight-color));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    text-shadow: 0 2px 10px rgba(255, 215, 0, 0.3);
  }

  h2 {
    font-size: 2rem;
    color: var(--accent-color);
    margin-top: 40px;
    position: relative;
    padding-left: 20px;
  }

  h2::before {
    content: "";
    position: absolute;
    left: 0;
    top: 5px;
    height: 80%;
    width: 5px;
    background: linear-gradient(to bottom, var(--accent-color), var(--highlight-color));
    border-radius: 5px;
  }

  h3 {
    font-size: 1.5rem;
    color: var(--highlight-color);
    margin-top: 30px;
  }

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

  .card {
    background: rgba(30, 30, 30, 0.7);
    border-radius: var(--border-radius);
    padding: 30px;
    margin: 30px 0;
    box-shadow: var(--box-shadow);
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: var(--transition);
  }

  .card:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 28px rgba(0, 0, 0, 0.4);
    border-color: rgba(255, 215, 0, 0.2);
  }

  .image-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
    margin: 40px 0;
  }

  .image-container {
    position: relative;
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--box-shadow);
    transition: var(--transition);
  }

  .image-container:hover {
    transform: scale(1.03);
  }

  .image-container img {
    width: 100%;
    height: auto;
    display: block;
    transition: var(--transition);
  }

  .image-container:hover img {
    opacity: 0.9;
  }

  .image-container::after {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(255, 215, 0, 0.1), rgba(0, 255, 127, 0.1));
    opacity: 0;
    transition: var(--transition);
  }

  .image-container:hover::after {
    opacity: 1;
  }

  pre {
    background: rgba(20, 20, 20, 0.8);
    border-radius: var(--border-radius);
    padding: 20px;
    margin: 20px 0;
    overflow-x: auto;
    box-shadow: var(--box-shadow);
    border-left: 4px solid var(--accent-color);
  }

  code {
    font-family: 'Courier New', monospace;
    color: var(--highlight-color);
    background: transparent;
    padding: 2px 4px;
    border-radius: 4px;
  }

  pre code {
    display: block;
    color: #E0E0E0;
    line-height: 1.5;
  }

  table {
    width: 100%;
    border-collapse: collapse;
    margin: 30px 0;
    background: rgba(30, 30, 30, 0.7);
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--box-shadow);
  }

  th, td {
    padding: 15px;
    text-align: left;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  }

  th {
    background: linear-gradient(90deg, rgba(255, 215, 0, 0.2), rgba(0, 255, 127, 0.2));
    color: var(--accent-color);
  }

  tr:hover {
    background: rgba(255, 255, 255, 0.03);
  }

  ol, ul {
    margin: 20px 0;
    padding-left: 30px;
  }

  li {
    margin-bottom: 10px;
    position: relative;
  }

  li::before {
    content: "•";
    color: var(--highlight-color);
    font-weight: bold;
    display: inline-block;
    width: 1em;
    margin-left: -1em;
  }

  .notice {
    background: rgba(255, 215, 0, 0.1);
    border-left: 4px solid var(--accent-color);
    padding: 20px;
    margin: 40px 0;
    border-radius: 0 var(--border-radius) var(--border-radius) 0;
  }

  .notice p {
    margin: 0;
    color: var(--accent-color);
  }

  @media (max-width: 768px) {
    h1 {
      font-size: 2.2rem;
    }
    h2 {
      font-size: 1.8rem;
    }
    h3 {
      font-size: 1.3rem;
    }
    .container {
      padding: 30px 15px;
    }
    .image-grid {
      grid-template-columns: 1fr;
    }
  }

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

  .floating {
    animation: float 4s ease-in-out infinite;
  }

  @keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
  }

  .pulsing {
    animation: pulse 2s ease-in-out infinite;
  }

  /* Navigation */
  .nav-container {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(18, 18, 18, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
    padding: 15px 0;
  }

  .nav {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
  }

  .nav-links {
    display: flex;
    gap: 25px;
  }

  .nav-link {
    color: var(--text-color);
    text-decoration: none;
    font-weight: 500;
    position: relative;
    padding: 5px 0;
    transition: var(--transition);
  }

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

  .nav-link::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--accent-color), var(--highlight-color));
    transition: var(--transition);
  }

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

  .logo {
    font-weight: 700;
    font-size: 1.5rem;
    background: linear-gradient(90deg, var(--accent-color), var(--highlight-color));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
  }

  /* Back to top button */
  .back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--accent-color), var(--highlight-color));
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    cursor: pointer;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 99;
  }

  .back-to-top.visible {
    opacity: 1;
    visibility: visible;
  }

  .back-to-top:hover {
    transform: translateY(-5px);
  }

  /* Section dividers */
  .section-divider {
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(255, 215, 0, 0.3), transparent);
    margin: 60px 0;
    border: none;
  }