Background Video in CSS

<!-- Section 1: Purple Gradient Background -->
<section class="video-section">
  <!-- 
      TO USE VIDEO: Uncomment the video tag below and add your video file
      <video class="bg-video" autoplay muted loop playsinline>
        <source src="your-video.mp4" type="video/mp4">
      </video>
    -->
  <div class="animated-bg"></div>
  <div class="video-overlay"></div>

  <div class="content">
    <h1>🎬 Pure CSS Background Video</h1>
    <p>No JavaScript required! This template uses only HTML and CSS. Add your video by uncommenting the video tag in the HTML.</p>
    <div class="btn-group">
      <a href="#section2" class="btn btn-primary">Explore More</a>
      <a href="#section3" class="btn btn-outline">Learn More</a>
    </div>

    <div class="features">
      <div class="feature-card">
        <div class="feature-icon">🚀</div>
        <div class="feature-title">Fast & Simple</div>
        <div class="feature-desc">Pure CSS means faster load times and better performance</div>
      </div>
      <div class="feature-card">
        <div class="feature-icon">🎨</div>
        <div class="feature-title">Beautiful Design</div>
        <div class="feature-desc">Stunning visuals with smooth animations</div>
      </div>
      <div class="feature-card">
        <div class="feature-icon">📱</div>
        <div class="feature-title">Fully Responsive</div>
        <div class="feature-desc">Works perfectly on all screen sizes</div>
      </div>
    </div>
  </div>

  <div class="scroll-indicator">
    <span></span>
  </div>
</section>

<!-- Section 2: Blue Gradient Background -->
<section class="video-section" id="section2">
  <div class="animated-bg animated-bg-2"></div>
  <div class="video-overlay"></div>

  <div class="content">
    <h1>🌊 Stunning Visuals</h1>
    <p>Create immersive experiences with full-screen video backgrounds. The video automatically covers the entire section with perfect responsive scaling.</p>
    <div class="btn-group">
      <a href="#section3" class="btn btn-primary">Next Section</a>
      <a href="#section1" class="btn btn-outline">Back to Top</a>
    </div>

    <div class="stats">
      <div class="stat-card">
        <div class="stat-number">100%</div>
        <div class="stat-label">CSS Only</div>
      </div>
      <div class="stat-card">
        <div class="stat-number">0</div>
        <div class="stat-label">JavaScript</div>
      </div>
      <div class="stat-card">
        <div class="stat-number">∞</div>
        <div class="stat-label">Possibilities</div>
      </div>
    </div>
  </div>
</section>

<!-- Section 3: Pink Gradient Background -->
<section class="video-section" id="section3">
  <div class="animated-bg animated-bg-3"></div>
  <div class="video-overlay"></div>
  <div class="pattern-overlay"></div>

  <div class="content">
    <h1>✨ Easy to Customize</h1>
    <p>Simply replace the animated-bg div with a video tag. The CSS handles all the positioning, scaling, and responsive behavior automatically.</p>
    <div class="btn-group">
      <a href="#section4" class="btn btn-primary">Continue</a>
      <a href="#section1" class="btn btn-outline">Start Over</a>
    </div>

    <div class="features">
      <div class="feature-card">
        <div class="feature-icon">⚡</div>
        <div class="feature-title">Optimized</div>
        <div class="feature-desc">Lightweight and performance-focused</div>
      </div>
      <div class="feature-card">
        <div class="feature-icon">🎯</div>
        <div class="feature-title">Professional</div>
        <div class="feature-desc">Clean, production-ready code</div>
      </div>
      <div class="feature-card">
        <div class="feature-icon">💪</div>
        <div class="feature-title">Powerful</div>
        <div class="feature-desc">Feature-rich yet simple</div>
      </div>
    </div>
  </div>
</section>

<!-- Section 4: Orange Gradient Background -->
<section class="video-section" id="section4">
  <div class="animated-bg animated-bg-4"></div>
  <div class="video-overlay"></div>

  <div class="content">
    <h1>🎉 Ready to Use!</h1>
    <p>All animations, transitions, and effects are pure CSS. Just add your video file and you're done. No frameworks, no dependencies, no JavaScript needed!</p>
    <div class="btn-group">
      <a href="#section1" class="btn btn-primary">Back to Start</a>
      <a href="#section2" class="btn btn-outline">Explore Again</a>
    </div>

    <div class="stats">
      <div class="stat-card">
        <div class="stat-number">🎨</div>
        <div class="stat-label">Beautiful</div>
      </div>
      <div class="stat-card">
        <div class="stat-number">⚙️</div>
        <div class="stat-label">Functional</div>
      </div>
      <div class="stat-card">
        <div class="stat-number">✅</div>
        <div class="stat-label">Complete</div>
      </div>
    </div>
  </div>
</section>

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

    body {
      font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
      overflow-x: hidden;
    }

    /* Video Section Container */
    .video-section {
      position: relative;
      min-height: 100vh;
      display: flex;
      align-items: center;
      justify-content: center;
      overflow: hidden;
    }

    /* Background Video Styling */
    .bg-video {
      position: absolute;
      top: 50%;
      left: 50%;
      min-width: 100%;
      min-height: 100%;
      width: auto;
      height: auto;
      transform: translate(-50%, -50%);
      z-index: -1;
      object-fit: cover;
    }

    /* Fallback: Animated Gradient Background */
    .animated-bg {
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background: linear-gradient(45deg, #667eea, #764ba2, #f093fb, #667eea);
      background-size: 400% 400%;
      animation: gradientMove 15s ease infinite;
      z-index: -2;
    }

    @keyframes gradientMove {
      0% { background-position: 0% 50%; }
      50% { background-position: 100% 50%; }
      100% { background-position: 0% 50%; }
    }

    .animated-bg-2 {
      background: linear-gradient(135deg, #4facfe, #00f2fe, #43e97b, #4facfe);
      background-size: 400% 400%;
      animation: gradientMove 20s ease infinite;
    }

    .animated-bg-3 {
      background: linear-gradient(225deg, #fa709a, #fee140, #f093fb, #fa709a);
      background-size: 400% 400%;
      animation: gradientMove 18s ease infinite;
    }

    .animated-bg-4 {
      background: linear-gradient(315deg, #ff6b6b, #4ecdc4, #ffd93d, #ff6b6b);
      background-size: 400% 400%;
      animation: gradientMove 22s ease infinite;
    }

    /* Video Overlay */
    .video-overlay {
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background: rgba(0, 0, 0, 0.4);
      z-index: 1;
    }

    /* Content */
    .content {
      position: relative;
      z-index: 10;
      text-align: center;
      color: white;
      padding: 40px;
      max-width: 1000px;
    }

    .content h1 {
      font-size: 4rem;
      font-weight: 700;
      margin-bottom: 20px;
      text-shadow: 3px 3px 10px rgba(0, 0, 0, 0.7);
      animation: fadeInDown 1.5s ease;
    }

    .content p {
      font-size: 1.5rem;
      margin-bottom: 40px;
      text-shadow: 2px 2px 6px rgba(0, 0, 0, 0.7);
      line-height: 1.8;
      animation: fadeInUp 1.5s ease 0.3s backwards;
    }

    @keyframes fadeInDown {
      from {
        opacity: 0;
        transform: translateY(-50px);
      }
      to {
        opacity: 1;
        transform: translateY(0);
      }
    }

    @keyframes fadeInUp {
      from {
        opacity: 0;
        transform: translateY(50px);
      }
      to {
        opacity: 1;
        transform: translateY(0);
      }
    }

    /* Buttons */
    .btn-group {
      display: flex;
      gap: 20px;
      justify-content: center;
      flex-wrap: wrap;
      animation: fadeInUp 1.5s ease 0.6s backwards;
    }

    .btn {
      padding: 18px 45px;
      font-size: 1.1rem;
      font-weight: 700;
      border: none;
      border-radius: 50px;
      cursor: pointer;
      transition: all 0.4s ease;
      text-decoration: none;
      display: inline-block;
      text-transform: uppercase;
      letter-spacing: 1.5px;
    }

    .btn-primary {
      background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
      color: white;
      box-shadow: 0 10px 30px rgba(102, 126, 234, 0.5);
    }

    .btn-primary:hover {
      transform: translateY(-5px) scale(1.05);
      box-shadow: 0 15px 40px rgba(102, 126, 234, 0.7);
    }

    .btn-outline {
      background: transparent;
      color: white;
      border: 3px solid white;
    }

    .btn-outline:hover {
      background: white;
      color: #667eea;
      transform: translateY(-5px) scale(1.05);
      box-shadow: 0 10px 30px rgba(255, 255, 255, 0.4);
    }

    /* Feature Cards */
    .features {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 30px;
      margin-top: 60px;
      animation: fadeInUp 1.5s ease 0.9s backwards;
    }

    .feature-card {
      background: rgba(255, 255, 255, 0.1);
      backdrop-filter: blur(15px);
      padding: 35px;
      border-radius: 20px;
      border: 2px solid rgba(255, 255, 255, 0.3);
      transition: all 0.4s ease;
    }

    .feature-card:hover {
      background: rgba(255, 255, 255, 0.2);
      transform: translateY(-15px) scale(1.03);
      box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
    }

    .feature-icon {
      font-size: 3.5rem;
      margin-bottom: 20px;
      animation: bounce 2s ease-in-out infinite;
    }

    .feature-card:nth-child(2) .feature-icon {
      animation-delay: 0.3s;
    }

    .feature-card:nth-child(3) .feature-icon {
      animation-delay: 0.6s;
    }

    @keyframes bounce {
      0%, 100% {
        transform: translateY(0);
      }
      50% {
        transform: translateY(-15px);
      }
    }

    .feature-title {
      font-size: 1.6rem;
      font-weight: 700;
      margin-bottom: 12px;
    }

    .feature-desc {
      font-size: 1.1rem;
      opacity: 0.95;
      line-height: 1.6;
    }

    /* Scroll Indicator */
    .scroll-indicator {
      position: absolute;
      bottom: 40px;
      left: 50%;
      transform: translateX(-50%);
      z-index: 10;
      animation: bounce 2s infinite;
    }

    .scroll-indicator span {
      display: block;
      width: 30px;
      height: 50px;
      border: 3px solid white;
      border-radius: 50px;
      position: relative;
    }

    .scroll-indicator span::before {
      content: '';
      position: absolute;
      top: 8px;
      left: 50%;
      transform: translateX(-50%);
      width: 6px;
      height: 10px;
      background: white;
      border-radius: 10px;
      animation: scroll 2s infinite;
    }

    @keyframes scroll {
      0% {
        opacity: 0;
        top: 8px;
      }
      50% {
        opacity: 1;
      }
      100% {
        opacity: 0;
        top: 25px;
      }
    }

    /* Stats Section */
    .stats {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
      gap: 30px;
      margin-top: 60px;
      animation: fadeInUp 1.5s ease 1.2s backwards;
    }

    .stat-card {
      text-align: center;
      background: rgba(255, 255, 255, 0.15);
      backdrop-filter: blur(15px);
      padding: 35px;
      border-radius: 20px;
      border: 2px solid rgba(255, 255, 255, 0.3);
      transition: all 0.4s ease;
    }

    .stat-card:hover {
      background: rgba(255, 255, 255, 0.25);
      transform: translateY(-10px) scale(1.05);
    }

    .stat-number {
      font-size: 3.5rem;
      font-weight: 700;
      margin-bottom: 10px;
      text-shadow: 2px 2px 8px rgba(0, 0, 0, 0.5);
    }

    .stat-label {
      font-size: 1.2rem;
      opacity: 0.95;
      text-transform: uppercase;
      letter-spacing: 1px;
    }

    /* Pattern Overlay */
    .pattern-overlay {
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background-image: 
        repeating-linear-gradient(
          45deg,
          transparent,
          transparent 60px,
          rgba(255, 255, 255, 0.03) 60px,
          rgba(255, 255, 255, 0.03) 120px
        );
      z-index: 2;
      pointer-events: none;
    }

    /* Responsive */
    @media (max-width: 768px) {
      .content h1 {
        font-size: 2.5rem;
      }

      .content p {
        font-size: 1.2rem;
      }

      .btn-group {
        flex-direction: column;
      }

      .btn {
        width: 100%;
        max-width: 300px;
      }

      .features {
        grid-template-columns: 1fr;
      }

      .stats {
        grid-template-columns: 1fr;
      }

      .scroll-indicator {
        bottom: 20px;
      }
    }