:root {
    --primary: #0d47a1;
    --secondary: #9c27b0;
    --accent: #ff9800;
    --light: #b0bec5;
    --dark: #121a24;
    --text: #e0e0e0;
    --bg-gradient: linear-gradient(135deg, #0d47a1 0%, #121a24 100%);
  }

  * {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Roboto', sans-serif;
  }

  body {
    background: var(--bg-gradient);
    color: var(--text);
    line-height: 1.6;
    min-height: 100%;
    overflow-x: hidden;
  }

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

  .tech-banner {
    position: relative;
    height: 400px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    margin-bottom: 60px;
    border-radius: 0 0 20px 20px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.3);
  }

  .tech-banner::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle, rgba(13,71,161,0.3) 0%, rgba(18,26,36,0.8) 100%);
    z-index: 1;
  }

  .banner-content {
    position: relative;
    z-index: 2;
    text-align: center;
    padding: 40px;
    max-width: 800px;
  }

  .banner-title {
    font-size: 3rem;
    margin-bottom: 20px;
    background: linear-gradient(90deg, #ff9800, #9c27b0);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    text-shadow: 0 2px 10px rgba(0,0,0,0.2);
  }

  .banner-subtitle {
    font-size: 1.2rem;
    margin-bottom: 30px;
    color: var(--light);
  }

  .grid-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(500px, 1fr));
    gap: 30px;
    margin: 60px 0;
  }

  .card {
    background: rgba(255,255,255,0.05);
    border-radius: 15px;
    padding: 30px;
    box-shadow: 0 8px 32px rgba(0,0,0,0.1);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255,255,255,0.1);
    transition: all 0.3s ease;
  }

  .card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0,0,0,0.2);
    border-color: rgba(255,152,0,0.3);
  }

  .card-title {
    font-size: 1.5rem;
    margin-bottom: 20px;
    color: var(--accent);
    position: relative;
    padding-bottom: 10px;
  }

  .card-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 50px;
    height: 3px;
    background: linear-gradient(90deg, var(--accent), var(--secondary));
  }

  .card-img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    border-radius: 10px;
    margin-bottom: 20px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.2);
    transition: transform 0.3s ease;
  }

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

  pre {
    background: rgba(0,0,0,0.3);
    border-radius: 10px;
    padding: 20px;
    margin: 20px 0;
    overflow: auto;
    border-left: 4px solid var(--accent);
    font-family: 'Courier New', monospace;
    line-height: 1.5;
  }

  code {
    color: #66bb6a;
    font-family: 'Courier New', monospace;
  }

  .tech-notice {
    background: rgba(255,152,0,0.1);
    border-left: 4px solid var(--accent);
    padding: 15px;
    margin: 30px 0;
    border-radius: 0 5px 5px 0;
  }

  .tech-notice p {
    color: var(--accent);
    font-weight: bold;
  }

  .section-divider {
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    margin: 60px 0;
    position: relative;
  }

  .section-divider::before {
    content: '';
    position: absolute;
    top: -5px;
    left: 50%;
    transform: translateX(-50%);
    width: 10px;
    height: 10px;
    background: var(--accent);
    border-radius: 50%;
    box-shadow: 0 0 10px var(--accent);
  }

  .nav-tabs {
    display: flex;
    margin-bottom: 30px;
    border-bottom: 1px solid rgba(255,255,255,0.1);
  }

  .nav-tab {
    padding: 10px 20px;
    cursor: pointer;
    position: relative;
    color: var(--light);
    transition: all 0.3s ease;
  }

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

  .nav-tab.active {
    color: var(--accent);
  }

  .nav-tab.active::after {
    content: '';
    position: absolute;
    bottom: -1px;
    left: 0;
    width: 100%;
    height: 2px;
    background: var(--accent);
  }

  @media (max-width: 768px) {
    .grid-container {
      grid-template-columns: 1fr;
    }
    
    .banner-title {
      font-size: 2rem;
    }
    
    .card {
      padding: 20px;
    }
  }

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

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

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

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