Animated CSS Backgrounds

<!-- Navigation Dots -->
<div class="nav">
  <div class="nav-dot active" onclick="scrollToSection(0)"></div>
  <div class="nav-dot" onclick="scrollToSection(1)"></div>
  <div class="nav-dot" onclick="scrollToSection(2)"></div>
  <div class="nav-dot" onclick="scrollToSection(3)"></div>
  <div class="nav-dot" onclick="scrollToSection(4)"></div>
  <div class="nav-dot" onclick="scrollToSection(5)"></div>
  <div class="nav-dot" onclick="scrollToSection(6)"></div>
  <div class="nav-dot" onclick="scrollToSection(7)"></div>
  <div class="nav-dot" onclick="scrollToSection(8)"></div>
  <div class="nav-dot" onclick="scrollToSection(9)"></div>
</div>

<!-- Background 1: Gradient Wave -->
<section class="section bg-1">
  <div class="content">
    <h1>1. Gradient Wave</h1>
    <p>Smooth flowing gradient animation with multiple colors transitioning seamlessly</p>
  </div>
</section>

<!-- Background 2: Floating Circles -->
<section class="section bg-2">
  <div class="content">
    <h1>2. Floating Circles</h1>
    <p>Large translucent circles floating gently across the screen</p>
  </div>
</section>

<!-- Background 3: Diagonal Stripes -->
<section class="section bg-3">
  <div class="content">
    <h1>3. Diagonal Stripes</h1>
    <p>Animated diagonal stripes moving continuously for a dynamic effect</p>
  </div>
</section>

<!-- Background 4: Particle Field -->
<section class="section bg-4">
  <div class="content">
    <h1>4. Particle Field</h1>
    <p>Floating particles creating a mesmerizing starfield effect</p>
  </div>
</section>

<!-- Background 5: Pulsing Gradient -->
<section class="section bg-5">
  <div class="content">
    <h1>5. Pulsing Gradient</h1>
    <p>Breathing gradient that pulses with brightness and saturation</p>
  </div>
</section>

<!-- Background 6: Rotating Squares -->
<section class="section bg-6">
  <div class="content">
    <h1>6. Rotating Squares</h1>
    <p>Geometric squares rotating endlessly in different positions</p>
  </div>
</section>

<!-- Background 7: Wave Pattern -->
<section class="section bg-7">
  <div class="content">
    <h1>7. Wave Pattern</h1>
    <p>Smooth wave animation at the bottom creating ocean-like motion</p>
  </div>
</section>

<!-- Background 8: Grid Pattern -->
<section class="section bg-8">
  <div class="content">
    <h1>8. Grid Pattern</h1>
    <p>Animated grid lines moving diagonally for a tech-inspired look</p>
  </div>
</section>

<!-- Background 9: Bubbles -->
<section class="section bg-9">
  <div class="content">
    <h1>9. Rising Bubbles</h1>
    <p>Bubbles floating upward with varying sizes and speeds</p>
  </div>
</section>

<!-- Background 10: Aurora Borealis -->
<section class="section bg-10">
  <div class="content">
    <h1>10. Aurora Borealis</h1>
    <p>Northern lights effect with shifting colorful gradients</p>
  </div>
</section>

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

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

    .section {
      min-height: 100vh;
      display: flex;
      align-items: center;
      justify-content: center;
      position: relative;
      overflow: hidden;
    }

    .content {
      position: relative;
      z-index: 10;
      text-align: center;
      color: white;
      padding: 40px;
      background: rgba(0, 0, 0, 0.3);
      backdrop-filter: blur(10px);
      border-radius: 20px;
      max-width: 600px;
    }

    .content h1 {
      font-size: 3rem;
      margin-bottom: 15px;
      text-shadow: 2px 2px 8px rgba(0, 0, 0, 0.5);
    }

    .content p {
      font-size: 1.3rem;
      opacity: 0.95;
    }

    /* Background 1: Gradient Wave Animation */
    .bg-1 {
      background: linear-gradient(45deg, #FF6B6B, #4ECDC4, #45B7D1, #F7DC6F);
      background-size: 400% 400%;
      animation: gradientWave 15s ease infinite;
    }

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

    /* Background 2: Floating Circles */
    .bg-2 {
      background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
      position: relative;
    }

    .bg-2::before {
      content: '';
      position: absolute;
      width: 500px;
      height: 500px;
      background: rgba(255, 255, 255, 0.1);
      border-radius: 50%;
      top: 10%;
      left: 10%;
      animation: float1 20s infinite ease-in-out;
    }

    .bg-2::after {
      content: '';
      position: absolute;
      width: 400px;
      height: 400px;
      background: rgba(255, 255, 255, 0.08);
      border-radius: 50%;
      bottom: 10%;
      right: 10%;
      animation: float2 15s infinite ease-in-out;
    }

    @keyframes float1 {
      0%, 100% { transform: translate(0, 0); }
      50% { transform: translate(100px, 100px); }
    }

    @keyframes float2 {
      0%, 100% { transform: translate(0, 0); }
      50% { transform: translate(-80px, -80px); }
    }

    /* Background 3: Diagonal Stripes */
    .bg-3 {
      background: linear-gradient(45deg, #f093fb 0%, #f5576c 100%);
      position: relative;
    }

    .bg-3::before {
      content: '';
      position: absolute;
      top: 0;
      left: -100%;
      width: 200%;
      height: 100%;
      background: repeating-linear-gradient(
        45deg,
        transparent,
        transparent 50px,
        rgba(255, 255, 255, 0.1) 50px,
        rgba(255, 255, 255, 0.1) 100px
      );
      animation: slideStripes 20s linear infinite;
    }

    @keyframes slideStripes {
      0% { transform: translateX(0); }
      100% { transform: translateX(100px); }
    }

    /* Background 4: Particle Field */
    .bg-4 {
      background: linear-gradient(135deg, #43e97b 0%, #38f9d7 100%);
      position: relative;
    }

    .particle {
      position: absolute;
      width: 4px;
      height: 4px;
      background: rgba(255, 255, 255, 0.8);
      border-radius: 50%;
      animation: particleFloat 15s linear infinite;
    }

    @keyframes particleFloat {
      0% {
        transform: translateY(100vh) translateX(0);
        opacity: 0;
      }
      10% {
        opacity: 1;
      }
      90% {
        opacity: 1;
      }
      100% {
        transform: translateY(-100px) translateX(100px);
        opacity: 0;
      }
    }

    /* Background 5: Pulsing Gradient */
    .bg-5 {
      background: linear-gradient(135deg, #fa709a 0%, #fee140 100%);
      animation: pulseGradient 5s ease-in-out infinite;
    }

    @keyframes pulseGradient {
      0%, 100% {
        filter: brightness(1) saturate(1);
        transform: scale(1);
      }
      50% {
        filter: brightness(1.2) saturate(1.3);
        transform: scale(1.02);
      }
    }

    /* Background 6: Rotating Squares */
    .bg-6 {
      background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
      position: relative;
    }

    .square {
      position: absolute;
      width: 200px;
      height: 200px;
      background: rgba(255, 255, 255, 0.05);
      border: 2px solid rgba(255, 255, 255, 0.1);
      animation: rotateSquare 20s linear infinite;
    }

    .square:nth-child(2) {
      top: 20%;
      left: 20%;
      animation-delay: -5s;
    }

    .square:nth-child(3) {
      bottom: 20%;
      right: 20%;
      animation-delay: -10s;
    }

    @keyframes rotateSquare {
      0% { transform: rotate(0deg); }
      100% { transform: rotate(360deg); }
    }

    /* Background 7: Wave Pattern */
    .bg-7 {
      background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
      position: relative;
    }

    .wave {
      position: absolute;
      bottom: 0;
      left: 0;
      width: 100%;
      height: 150px;
      background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1200 120"><path d="M0,64L48,58.7C96,53,192,43,288,48C384,53,480,75,576,80C672,85,768,75,864,58.7C960,43,1056,21,1152,21.3C1248,21,1344,43,1392,53.3L1440,64L1440,120L1392,120C1344,120,1248,120,1152,120C1056,120,960,120,864,120C768,120,672,120,576,120C480,120,384,120,288,120C192,120,96,120,48,120L0,120Z" fill="rgba(255,255,255,0.1)"/></svg>');
      background-size: cover;
      animation: waveMove 10s linear infinite;
    }

    @keyframes waveMove {
      0% { background-position: 0 0; }
      100% { background-position: 1200px 0; }
    }

    /* Background 8: Grid Pattern */
    .bg-8 {
      background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
      position: relative;
    }

    .bg-8::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background-image: 
        linear-gradient(rgba(255, 255, 255, 0.1) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.1) 1px, transparent 1px);
      background-size: 50px 50px;
      animation: gridMove 20s linear infinite;
    }

    @keyframes gridMove {
      0% { transform: translate(0, 0); }
      100% { transform: translate(50px, 50px); }
    }

    /* Background 9: Bubbles */
    .bg-9 {
      background: linear-gradient(135deg, #a8edea 0%, #fed6e3 100%);
      position: relative;
    }

    .bubble {
      position: absolute;
      bottom: -100px;
      background: rgba(255, 255, 255, 0.2);
      border-radius: 50%;
      animation: bubbleRise 15s infinite ease-in;
    }

    @keyframes bubbleRise {
      0% {
        bottom: -100px;
        opacity: 0;
      }
      10% {
        opacity: 1;
      }
      90% {
        opacity: 1;
      }
      100% {
        bottom: 110vh;
        opacity: 0;
      }
    }

    /* Background 10: Aurora Borealis */
    .bg-10 {
      background: #0a0e27;
      position: relative;
    }

    .aurora {
      position: absolute;
      width: 100%;
      height: 100%;
      background: linear-gradient(
        135deg,
        rgba(0, 255, 200, 0.3) 0%,
        rgba(0, 150, 255, 0.3) 25%,
        rgba(150, 0, 255, 0.3) 50%,
        rgba(255, 0, 150, 0.3) 75%,
        rgba(0, 255, 200, 0.3) 100%
      );
      background-size: 200% 200%;
      animation: aurora 15s ease infinite;
      opacity: 0.6;
      filter: blur(80px);
    }

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

    /* Navigation */
    .nav {
      position: fixed;
      top: 20px;
      right: 20px;
      z-index: 1000;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .nav-dot {
      width: 15px;
      height: 15px;
      background: rgba(255, 255, 255, 0.5);
      border-radius: 50%;
      cursor: pointer;
      transition: all 0.3s;
      border: 2px solid white;
    }

    .nav-dot:hover,
    .nav-dot.active {
      transform: scale(1.5);
      background: white;
    }

    @media (max-width: 768px) {
      .content h1 {
        font-size: 2rem;
      }

      .content p {
        font-size: 1rem;
      }

      .square {
        width: 100px;
        height: 100px;
      }
    }

   // Create particles for Background 4
    const bg4 = document.querySelector('.bg-4');
    for (let i = 0; i < 50; i++) {
      const particle = document.createElement('div');
      particle.className = 'particle';
      particle.style.left = Math.random() * 100 + '%';
      particle.style.animationDelay = Math.random() * 15 + 's';
      particle.style.animationDuration = (Math.random() * 10 + 10) + 's';
      bg4.appendChild(particle);
    }

    // Create squares for Background 6
    const bg6 = document.querySelector('.bg-6');
    for (let i = 0; i < 3; i++) {
      const square = document.createElement('div');
      square.className = 'square';
      square.style.top = Math.random() * 80 + '%';
      square.style.left = Math.random() * 80 + '%';
      bg6.appendChild(square);
    }

    // Create waves for Background 7
    const bg7 = document.querySelector('.bg-7');
    const wave = document.createElement('div');
    wave.className = 'wave';
    bg7.appendChild(wave);

    // Create bubbles for Background 9
    const bg9 = document.querySelector('.bg-9');
    for (let i = 0; i < 20; i++) {
      const bubble = document.createElement('div');
      bubble.className = 'bubble';
      const size = Math.random() * 60 + 20;
      bubble.style.width = size + 'px';
      bubble.style.height = size + 'px';
      bubble.style.left = Math.random() * 100 + '%';
      bubble.style.animationDelay = Math.random() * 15 + 's';
      bubble.style.animationDuration = (Math.random() * 10 + 10) + 's';
      bg9.appendChild(bubble);
    }

    // Create aurora for Background 10
    const bg10 = document.querySelector('.bg-10');
    const aurora = document.createElement('div');
    aurora.className = 'aurora';
    bg10.appendChild(aurora);

    // Navigation
    function scrollToSection(index) {
      const sections = document.querySelectorAll('.section');
      sections[index].scrollIntoView({ behavior: 'smooth' });
      
      document.querySelectorAll('.nav-dot').forEach((dot, i) => {
        dot.classList.toggle('active', i === index);
      });
    }

    // Update active dot on scroll
    window.addEventListener('scroll', () => {
      const sections = document.querySelectorAll('.section');
      const dots = document.querySelectorAll('.nav-dot');
      
      let current = 0;
      sections.forEach((section, index) => {
        const rect = section.getBoundingClientRect();
        if (rect.top <= window.innerHeight / 2 && rect.bottom >= window.innerHeight / 2) {
          current = index;
        }
      });
      
      dots.forEach((dot, index) => {
        dot.classList.toggle('active', index === current);
      });
    });