/* CSS Variables */
    :root {
      --primary-color: #3498db;
      --secondary-color: #2c3e50;
      --accent-color: #e74c3c;
      --light-color: #ecf0f1;
      --dark-color: #34495e;
      --success-color: #2ecc71;
      --warning-color: #f59e0b;
      --border-radius: 6px;
      --box-shadow: 0 2px 5px rgba(0,0,0,0.1);
      --hero-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
      --accent-gradient: linear-gradient(45deg, #3498db, #2980b9);
      --tech-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    }

    /* Reset & Base Styles */
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }

    body {
      font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
      line-height: 1.7;
      color: var(--dark-color);
      background-color: #f5f7fa;
    }

    /* Hero Section */
    .hero-section {
      background: var(--hero-gradient);
      color: white;
      padding: 4rem 20px;
    }

    .hero-container {
      max-width: 1200px;
      margin: 0 auto;
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 4rem;
      align-items: center;
    }

    .hero-content h1 {
      font-size: 3.5rem;
      font-weight: 700;
      margin-bottom: 1rem;
      line-height: 1.2;
      background: linear-gradient(45deg, #fff, #e2e8f0);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-content .subtitle {
      font-size: 1.3rem;
      opacity: 0.95;
      margin-bottom: 2rem;
      line-height: 1.5;
    }

    .hero-features {
      display: flex;
      flex-direction: column;
      gap: 1rem;
      margin-bottom: 2rem;
    }

    .hero-feature {
      display: flex;
      align-items: center;
      gap: 1rem;
      font-weight: 500;
      font-size: 1.1rem;
    }

    .feature-icon {
      font-size: 1.5rem;
      min-width: 30px;
    }

    .demo-container {
      position: relative;
      width: 100%;
      max-width: 500px;
      height: 280px;
      border-radius: 16px;
      overflow: hidden;
      background: #111;
      box-shadow: 0 8px 40px rgba(0,0,0,0.3);
    }
    .video, .video-top {
      position: absolute;
      width: 100%; 
      height: 100%;
      top: 0; 
      left: 0;
      object-fit: cover;
      user-select: none;
      pointer-events: none;
    }
    .clip {
      position: absolute;
      top: 0; 
      left: 0; 
      height: 100%;
      width: 100%;
      overflow: hidden;
      pointer-events: none;
      clip-path: inset(0 50% 0 0);
    }
    .slider-bar {
      position: absolute;
      top: 0;
      left: 50%;
      width: 8px;
      height: 100%;
      background: #fff;
      border-radius: 8px;
      border: 2px solid #222;
      cursor: ew-resize;
      z-index: 20;
      transform: translateX(-50%);
      transition: box-shadow 0.1s;
      box-shadow: 0 0 0 #007bff00;
    }
    .slider-bar:active {
      box-shadow: 0 0 12px #007bffcc;
    }
    .player-icons {
      position: absolute;
      top: 10px;
      right: 12px;
      z-index: 30;
      display: flex;
      gap: 10px;
    }
    .player-icon {
      background: rgba(0,0,0,0.4);
      border: none;
      outline: none;
      border-radius: 5px;
      width: 36px; 
      height: 36px;
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      font-size: 22px;
      color: #fff;
      transition: background 0.2s;
    }
    .player-icon:hover {
      background: rgba(0,0,0,0.8);
    }
    .labels {
      position: absolute;
      bottom: 15px;
      left: 15px;
      right: 15px;
      display: flex;
      justify-content: space-between;
      z-index: 25;
      pointer-events: none;
    }
    .label {
      background: rgba(0,0,0,0.6);
      color: white;
      padding: 6px 12px;
      border-radius: 4px;
      font-family: Arial, sans-serif;
      font-size: 14px;
      font-weight: 500;
    }

    .cta-button {
      display: inline-block;
      background: linear-gradient(90deg, #51d6ff 0%, #1676ff 100%);
      color: white;
      padding: 1rem 2rem;
      border-radius: 50px;
      text-decoration: none;
      font-weight: 700;
      font-size: 1.1rem;
      transition: all 0.3s ease;
      border: none;
      cursor: pointer;
      box-shadow: 0 6px 24px rgba(52,152,219,0.3);
    }

    .cta-button:hover {
      transform: translateY(-3px);
      box-shadow: 0 10px 30px rgba(52,152,219,0.4);
    }

    .top-banner {
      background: var(--hero-gradient);
      color: white;
      text-align: center;
      padding: 8px 0;
      font-size: 0.9rem;
    }

    .top-banner a {
      color: white;
      text-decoration: underline;
      font-weight: 500;
    }

    .main-header {
      background: white;
      box-shadow: 0 2px 10px rgba(0,0,0,0.1);
      position: sticky;
      top: 0;
      z-index: 1000;
    }

    .header-nav {
      max-width: 1200px;
      margin: 0 auto;
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 1rem 20px;
    }

    .logo-section {
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .logo {
      height: 40px;
      width: auto;
    }

    .nav-menu {
      display: flex;
      list-style: none;
      gap: 2rem;
      align-items: center;
    }

    .nav-menu a {
      text-decoration: none;
      color: var(--dark-color);
      font-weight: 500;
      transition: color 0.3s ease;
    }

    .nav-menu a:hover {
      color: var(--primary-color);
    }

    .tech-badge {
      display: inline-block;
      background: var(--primary-color);
      color: white;
      padding: 4px 8px;
      border-radius: 12px;
      font-size: 0.8rem;
      font-weight: 500;
      margin-left: 8px;
    }

    .demo-button {
      background: var(--primary-color);
      color: white;
      padding: 0.75rem 1.5rem;
      border-radius: 6px;
      text-decoration: none;
      font-weight: 600;
      transition: all 0.3s ease;
    }

    .demo-button:hover {
      background: #2980b9;
      transform: translateY(-2px);
    }

    @media (max-width: 768px) {
      .hero-container {
        grid-template-columns: 1fr;
        gap: 2rem;
        text-align: center;
      }
      
      .hero-content h1 {
        font-size: 2.5rem;
      }
      
      .demo-container {
        max-width: 100%;
        height: 200px;
      }
      
      .nav-menu {
        display: none;
      }
    }