:root {
    --primary: #0D1B2A;
    --secondary: #1B263B;
    --accent: #00FFAB;
    --highlight: #A855F7;
    --text: #FFFFFF;
    --shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
  }

  @font-face {
    font-family: 'Roboto';
    src: url('https://fonts.googleapis.com/css2?family=Roboto:wght@300;400;500;700&display=swap');
  }

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

  body {
    background: linear-gradient(135deg, var(--primary), #000);
    color: var(--text);
    font-family: 'Roboto', sans-serif;
    line-height: 1.6;
    overflow-x: hidden;
    min-height: 100%;
    padding-bottom: 100px;
  }

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

  .header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(27, 38, 59, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    box-shadow: var(--shadow);
    padding: 15px 0;
  }

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

  .nav-logo {
    font-size: 24px;
    font-weight: 700;
    color: var(--accent);
    text-decoration: none;
    display: flex;
    align-items: center;
  }

  .nav-logo span {
    margin-left: 10px;
  }

  .nav-menu {
    display: flex;
    list-style: none;
  }

  .nav-item {
    margin-left: 30px;
  }

  .nav-link {
    color: var(--text);
    text-decoration: none;
    font-size: 16px;
    font-weight: 500;
    position: relative;
    transition: var(--transition);
  }

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

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

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

  .hero {
    padding: 180px 0 100px;
    text-align: center;
    position: relative;
    overflow: hidden;
  }

  .hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at 50% 50%, rgba(168, 85, 247, 0.1), transparent 70%);
    z-index: -1;
  }

  .hero-title {
    font-size: 48px;
    font-weight: 700;
    margin-bottom: 20px;
    background: linear-gradient(90deg, var(--accent), var(--highlight));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: textGlow 3s ease-in-out infinite alternate;
  }

  @keyframes textGlow {
    0% {
      text-shadow: 0 0 10px rgba(0, 255, 171, 0.3);
    }
    100% {
      text-shadow: 0 0 20px rgba(168, 85, 247, 0.5);
    }
  }

  .hero-subtitle {
    font-size: 20px;
    max-width: 700px;
    margin: 0 auto 40px;
    opacity: 0.9;
  }

  .hero-image {
    width: 100%;
    max-width: 800px;
    margin: 40px auto 0;
    border-radius: 20px;
    box-shadow: var(--shadow);
    transition: var(--transition);
  }

  .hero-image:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
  }

  .section {
    padding: 80px 0;
    position: relative;
  }

  .section-title {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 40px;
    position: relative;
    display: inline-block;
  }

  .section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 0;
    width: 60px;
    height: 4px;
    background: linear-gradient(90deg, var(--accent), var(--highlight));
    border-radius: 2px;
  }

  .card {
    background: rgba(27, 38, 59, 0.7);
    border-radius: 16px;
    padding: 30px;
    margin-bottom: 30px;
    box-shadow: var(--shadow);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: var(--transition);
  }

  .card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
    border-color: rgba(0, 255, 171, 0.3);
  }

  .card-title {
    font-size: 24px;
    margin-bottom: 15px;
    color: var(--accent);
  }

  .card-image {
    width: 100%;
    border-radius: 12px;
    margin-bottom: 20px;
    transition: var(--transition);
  }

  .card-image:hover {
    transform: scale(1.02);
  }

  .grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
  }

  .code-block {
    background: rgba(13, 27, 42, 0.8);
    border-radius: 12px;
    padding: 20px;
    margin: 20px 0;
    overflow-x: auto;
    border-left: 4px solid var(--accent);
    font-family: 'Courier New', monospace;
    font-size: 15px;
    line-height: 1.5;
    position: relative;
  }

  .code-block::before {
    content: 'CSS';
    position: absolute;
    top: 10px;
    right: 15px;
    font-size: 12px;
    color: var(--accent);
    opacity: 0.7;
  }

  .floating-label {
    position: absolute;
    top: 20px;
    right: 20px;
    background: rgba(0, 255, 171, 0.1);
    color: var(--accent);
    padding: 5px 15px;
    border-radius: 20px;
    font-size: 14px;
    font-weight: 500;
  }

  .footer {
    background: var(--secondary);
    padding: 40px 0;
    text-align: center;
    margin-top: 80px;
  }

  .footer-text {
    opacity: 0.7;
    font-size: 14px;
  }

  .floating-button {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--accent), var(--highlight));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    cursor: pointer;
    transition: var(--transition);
    z-index: 100;
  }

  .floating-button:hover {
    transform: scale(1.1) rotate(10deg);
    box-shadow: 0 6px 25px rgba(0, 0, 0, 0.4);
  }

  .floating-button i {
    font-size: 24px;
    color: white;
  }

  @media (max-width: 768px) {
    .hero-title {
      font-size: 36px;
    }
    
    .hero-subtitle {
      font-size: 18px;
    }
    
    .nav-menu {
      display: none;
    }
    
    .grid {
      grid-template-columns: 1fr;
    }
  }

  /* Animation classes */
  .fade-in {
    animation: fadeIn 1s ease-in-out;
  }

  @keyframes fadeIn {
    from {
      opacity: 0;
      transform: translateY(20px);
    }
    to {
      opacity: 1;
      transform: translateY(0);
    }
  }

  .pulse {
    animation: pulse 2s infinite;
  }

  @keyframes pulse {
    0% {
      transform: scale(1);
    }
    50% {
      transform: scale(1.05);
    }
    100% {
      transform: scale(1);
    }
  }

  /* Custom scrollbar */
  ::-webkit-scrollbar {
    width: 8px;
  }

  ::-webkit-scrollbar-track {
    background: var(--primary);
  }

  ::-webkit-scrollbar-thumb {
    background: linear-gradient(var(--accent), var(--highlight));
    border-radius: 4px;
  }

  /* Tooltip */
  [data-tooltip] {
    position: relative;
  }

  [data-tooltip]::after {
    content: attr(data-tooltip);
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(0, 0, 0, 0.8);
    color: white;
    padding: 5px 10px;
    border-radius: 4px;
    font-size: 14px;
    white-space: nowrap;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
  }

  [data-tooltip]:hover::after {
    opacity: 1;
    visibility: visible;
    bottom: calc(100% + 5px);
  }