Animated Web Backgrounds

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  <!-- Background 1: Gradient Wave -->
  <div class="background-section bg-gradient-wave" id="bg1">
    <div class="wave"></div>
    <div class="content-card">
      <div class="bg-number">Background 01</div>
      <h2>Gradient Wave</h2>
      <p>Smooth flowing waves with animated gradients creating an oceanic feel perfect for modern web designs.</p>
      <div class="nav-buttons">
        <button class="nav-btn" onclick="scrollToSection('bg10')">
          <ion-icon name="arrow-up-outline"></ion-icon>
          Previous
        </button>
        <button class="nav-btn" onclick="scrollToSection('bg2')">
          Next
          <ion-icon name="arrow-down-outline"></ion-icon>
        </button>
      </div>
    </div>
  </div>

  <!-- Background 2: Floating Particles -->
  <div class="background-section bg-particles" id="bg2">
    <div class="content-card">
      <div class="bg-number">Background 02</div>
      <h2>Floating Particles</h2>
      <p>Mesmerizing particles floating upward, creating a dreamy atmosphere ideal for creative portfolios.</p>
      <div class="nav-buttons">
        <button class="nav-btn" onclick="scrollToSection('bg1')">
          <ion-icon name="arrow-up-outline"></ion-icon>
          Previous
        </button>
        <button class="nav-btn" onclick="scrollToSection('bg3')">
          Next
          <ion-icon name="arrow-down-outline"></ion-icon>
        </button>
      </div>
    </div>
  </div>

  <!-- Background 3: Geometric Shapes -->
  <div class="background-section bg-geometric" id="bg3">
    <div class="content-card">
      <div class="bg-number">Background 03</div>
      <h2>Geometric Shapes</h2>
      <p>Rotating geometric shapes creating a dynamic and modern aesthetic for tech-focused websites.</p>
      <div class="nav-buttons">
        <button class="nav-btn" onclick="scrollToSection('bg2')">
          <ion-icon name="arrow-up-outline"></ion-icon>
          Previous
        </button>
        <button class="nav-btn" onclick="scrollToSection('bg4')">
          Next
          <ion-icon name="arrow-down-outline"></ion-icon>
        </button>
      </div>
    </div>
  </div>

  <!-- Background 4: Matrix Rain -->
  <div class="background-section bg-matrix" id="bg4">
    <div class="content-card">
      <div class="bg-number">Background 04</div>
      <h2>Matrix Rain</h2>
      <p>Falling digital code creating a cyberpunk atmosphere perfect for tech and gaming websites.</p>
      <div class="nav-buttons">
        <button class="nav-btn" onclick="scrollToSection('bg3')">
          <ion-icon name="arrow-up-outline"></ion-icon>
          Previous
        </button>
        <button class="nav-btn" onclick="scrollToSection('bg5')">
          Next
          <ion-icon name="arrow-down-outline"></ion-icon>
        </button>
      </div>
    </div>
  </div>

  <!-- Background 5: Aurora Borealis -->
  <div class="background-section bg-aurora" id="bg5">
    <div class="aurora" style="top: 20%;"></div>
    <div class="aurora" style="top: 40%;"></div>
    <div class="content-card">
      <div class="bg-number">Background 05</div>
      <h2>Aurora Borealis</h2>
      <p>Northern lights effect with flowing colors creating a magical and ethereal experience.</p>
      <div class="nav-buttons">
        <button class="nav-btn" onclick="scrollToSection('bg4')">
          <ion-icon name="arrow-up-outline"></ion-icon>
          Previous
        </button>
        <button class="nav-btn" onclick="scrollToSection('bg6')">
          Next
          <ion-icon name="arrow-down-outline"></ion-icon>
        </button>
      </div>
    </div>
  </div>

  <!-- Background 6: Starfield -->
  <div class="background-section bg-starfield" id="bg6">
    <div class="content-card">
      <div class="bg-number">Background 06</div>
      <h2>Starfield</h2>
      <p>Twinkling stars in the night sky creating a peaceful and cosmic atmosphere.</p>
      <div class="nav-buttons">
        <button class="nav-btn" onclick="scrollToSection('bg5')">
          <ion-icon name="arrow-up-outline"></ion-icon>
          Previous
        </button>
        <button class="nav-btn" onclick="scrollToSection('bg7')">
          Next
          <ion-icon name="arrow-down-outline"></ion-icon>
        </button>
      </div>
    </div>
  </div>

  <!-- Background 7: Bubble Float -->
  <div class="background-section bg-bubbles" id="bg7">
    <div class="content-card">
      <div class="bg-number">Background 07</div>
      <h2>Bubble Float</h2>
      <p>Rising bubbles with glassmorphism effect creating a fresh and clean design aesthetic.</p>
      <div class="nav-buttons">
        <button class="nav-btn" onclick="scrollToSection('bg6')">
          <ion-icon name="arrow-up-outline"></ion-icon>
          Previous
        </button>
        <button class="nav-btn" onclick="scrollToSection('bg8')">
          Next
          <ion-icon name="arrow-down-outline"></ion-icon>
        </button>
      </div>
    </div>
  </div>

  <!-- Background 8: Mesh Gradient -->
  <div class="background-section bg-mesh" id="bg8">
    <div class="content-card">
      <div class="bg-number">Background 08</div>
      <h2>Mesh Gradient</h2>
      <p>Blurred gradient blobs creating a trendy mesh effect popular in modern UI design.</p>
      <div class="nav-buttons">
        <button class="nav-btn" onclick="scrollToSection('bg7')">
          <ion-icon name="arrow-up-outline"></ion-icon>
          Previous
        </button>
        <button class="nav-btn" onclick="scrollToSection('bg9')">
          Next
          <ion-icon name="arrow-down-outline"></ion-icon>
        </button>
      </div>
    </div>
  </div>

  <!-- Background 9: Grid Lines -->
  <div class="background-section bg-grid" id="bg9">
    <div class="grid"></div>
    <div class="content-card">
      <div class="bg-number">Background 09</div>
      <h2>Grid Lines</h2>
      <p>Futuristic 3D grid with perspective creating a retro cyberpunk vibe.</p>
      <div class="nav-buttons">
        <button class="nav-btn" onclick="scrollToSection('bg8')">
          <ion-icon name="arrow-up-outline"></ion-icon>
          Previous
        </button>
        <button class="nav-btn" onclick="scrollToSection('bg10')">
          Next
          <ion-icon name="arrow-down-outline"></ion-icon>
        </button>
      </div>
    </div>
  </div>

  <!-- Background 10: Liquid Gradient -->
  <div class="background-section bg-liquid" id="bg10">
    <div class="content-card">
      <div class="bg-number">Background 10</div>
      <h2>Liquid Gradient</h2>
      <p>Morphing liquid shapes with smooth gradients creating an organic and fluid design.</p>
      <div class="nav-buttons">
        <button class="nav-btn" onclick="scrollToSection('bg9')">
          <ion-icon name="arrow-up-outline"></ion-icon>
          Previous
        </button>
        <button class="nav-btn" onclick="scrollToSection('bg1')">
          Next
          <ion-icon name="arrow-down-outline"></ion-icon>
        </button>
      </div>
    </div>
  </div>

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

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

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

  .content-card {
    background: rgba(255, 255, 255, 0.95);
    padding: 3rem 2.5rem;
    border-radius: 24px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    text-align: center;
    max-width: 500px;
    z-index: 10;
    backdrop-filter: blur(10px);
    margin: 2rem;
  }

  .bg-number {
    font-size: 0.875rem;
    color: #6c757d;
    font-weight: 600;
    margin-bottom: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 1px;
  }

  .content-card h2 {
    font-size: 2rem;
    margin-bottom: 1rem;
    color: #2c3e50;
  }

  .content-card p {
    color: #6c757d;
    line-height: 1.6;
    margin-bottom: 1.5rem;
  }

  .nav-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
  }

  .nav-btn {
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: 12px;
    cursor: pointer;
    font-size: 0.95rem;
    font-weight: 500;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 0.5rem;
  }

  .nav-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(102, 126, 234, 0.4);
  }

  /* Background 1: Gradient Wave */
  .bg-gradient-wave {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  }

  .wave {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 200%;
    height: 200px;
    background: linear-gradient(to right, rgba(255,255,255,0.1), rgba(255,255,255,0.2));
    animation: waveMove 15s linear infinite;
  }

  .wave::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 1200 120'%3E%3Cpath d='M0,50 Q300,0 600,50 T1200,50 L1200,120 L0,120 Z' fill='rgba(255,255,255,0.1)'/%3E%3C/svg%3E");
    background-size: 50% 100%;
    animation: waveMove 10s linear infinite;
  }

  @keyframes waveMove {
    0% { transform: translateX(0); }
    100% { transform: translateX(-50%); }
  }

  /* Background 2: Floating Particles */
  .bg-particles {
    background: linear-gradient(135deg, #1e3c72 0%, #2a5298 100%);
  }

  .particle {
    position: absolute;
    width: 4px;
    height: 4px;
    background: rgba(255, 255, 255, 0.6);
    border-radius: 50%;
    animation: particleFloat 20s 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 3: Geometric Shapes */
  .bg-geometric {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
  }

  .shape {
    position: absolute;
    border: 2px solid rgba(255, 255, 255, 0.3);
    animation: shapeRotate 20s linear infinite;
  }

  .shape-circle {
    border-radius: 50%;
  }

  @keyframes shapeRotate {
    0% { transform: rotate(0deg) scale(1); }
    50% { transform: rotate(180deg) scale(1.2); }
    100% { transform: rotate(360deg) scale(1); }
  }

  /* Background 4: Matrix Rain */
  .bg-matrix {
    background: #000000;
  }

  .matrix-column {
    position: absolute;
    top: -100%;
    width: 20px;
    font-family: 'Courier New', monospace;
    font-size: 14px;
    color: #0f0;
    animation: matrixFall 10s linear infinite;
  }

  @keyframes matrixFall {
    0% { top: -100%; opacity: 1; }
    100% { top: 100%; opacity: 0.3; }
  }

  /* Background 5: Aurora Borealis */
  .bg-aurora {
    background: #001a33;
  }

  .aurora {
    position: absolute;
    width: 100%;
    height: 300px;
    background: linear-gradient(90deg, 
      transparent, 
      rgba(0, 255, 150, 0.3), 
      rgba(100, 150, 255, 0.3), 
      transparent);
    filter: blur(40px);
    animation: auroraMove 15s ease-in-out infinite;
  }

  .aurora:nth-child(2) {
    animation-delay: 3s;
    background: linear-gradient(90deg, 
      transparent, 
      rgba(255, 100, 200, 0.2), 
      rgba(150, 100, 255, 0.2), 
      transparent);
  }

  @keyframes auroraMove {
    0%, 100% { transform: translateX(-20%) translateY(0); }
    50% { transform: translateX(20%) translateY(-50px); }
  }

  /* Background 6: Starfield */
  .bg-starfield {
    background: radial-gradient(ellipse at bottom, #1b2735 0%, #090a0f 100%);
  }

  .star {
    position: absolute;
    width: 2px;
    height: 2px;
    background: white;
    border-radius: 50%;
    animation: starTwinkle 3s ease-in-out infinite;
  }

  @keyframes starTwinkle {
    0%, 100% { opacity: 0.2; transform: scale(1); }
    50% { opacity: 1; transform: scale(1.5); }
  }

  /* Background 7: Bubble Float */
  .bg-bubbles {
    background: linear-gradient(135deg, #43e97b 0%, #38f9d7 100%);
  }

  .bubble {
    position: absolute;
    bottom: -100px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    animation: bubbleRise 10s ease-in infinite;
    backdrop-filter: blur(5px);
    border: 1px solid rgba(255, 255, 255, 0.3);
  }

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

  /* Background 8: Mesh Gradient */
  .bg-mesh {
    background: #ff9a8b;
    background: linear-gradient(90deg, #ff9a8b 0%, #ff6a88 55%, #ff99ac 100%);
    position: relative;
  }

  .mesh-blob {
    position: absolute;
    border-radius: 50%;
    filter: blur(60px);
    animation: meshMove 20s ease-in-out infinite;
  }

  @keyframes meshMove {
    0%, 100% { transform: translate(0, 0); }
    25% { transform: translate(100px, -50px); }
    50% { transform: translate(50px, 100px); }
    75% { transform: translate(-100px, 50px); }
  }

  /* Background 9: Grid Lines */
  .bg-grid {
    background: #0f0f1e;
    position: relative;
  }

  .grid {
    position: absolute;
    width: 100%;
    height: 100%;
    background-image: 
      linear-gradient(rgba(100, 100, 255, 0.2) 1px, transparent 1px),
      linear-gradient(90deg, rgba(100, 100, 255, 0.2) 1px, transparent 1px);
    background-size: 50px 50px;
    animation: gridScroll 20s linear infinite;
    transform-origin: center;
  }

  @keyframes gridScroll {
    0% { transform: perspective(500px) rotateX(60deg) translateZ(0); }
    100% { transform: perspective(500px) rotateX(60deg) translateZ(100px); }
  }

  /* Background 10: Liquid Gradient */
  .bg-liquid {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  }

  .liquid-shape {
    position: absolute;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 40% 60% 70% 30% / 40% 50% 60% 50%;
    filter: blur(40px);
    animation: liquidMorph 10s ease-in-out infinite;
  }

  @keyframes liquidMorph {
    0%, 100% {
      border-radius: 40% 60% 70% 30% / 40% 50% 60% 50%;
      transform: translate(0, 0) rotate(0deg);
    }
    25% {
      border-radius: 70% 30% 50% 50% / 30% 30% 70% 70%;
      transform: translate(50px, -50px) rotate(90deg);
    }
    50% {
      border-radius: 30% 60% 70% 40% / 50% 60% 30% 60%;
      transform: translate(-50px, 50px) rotate(180deg);
    }
    75% {
      border-radius: 60% 40% 30% 70% / 70% 50% 60% 40%;
      transform: translate(50px, 50px) rotate(270deg);
    }
  }

    function scrollToSection(id) {
      document.getElementById(id).scrollIntoView({ behavior: 'smooth' });
    }

    // Generate particles
    const particlesContainer = document.querySelector('.bg-particles');
    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() * 20 + 's';
      particle.style.animationDuration = (Math.random() * 10 + 15) + 's';
      particlesContainer.appendChild(particle);
    }

    // Generate geometric shapes
    const geometricContainer = document.querySelector('.bg-geometric');
    for (let i = 0; i < 8; i++) {
      const shape = document.createElement('div');
      shape.className = i % 2 === 0 ? 'shape shape-circle' : 'shape';
      const size = Math.random() * 100 + 50;
      shape.style.width = size + 'px';
      shape.style.height = size + 'px';
      shape.style.left = Math.random() * 100 + '%';
      shape.style.top = Math.random() * 100 + '%';
      shape.style.animationDelay = Math.random() * 5 + 's';
      shape.style.animationDuration = (Math.random() * 10 + 15) + 's';
      geometricContainer.appendChild(shape);
    }

    // Generate matrix rain
    const matrixContainer = document.querySelector('.bg-matrix');
    for (let i = 0; i < 30; i++) {
      const column = document.createElement('div');
      column.className = 'matrix-column';
      column.style.left = (i * 3.5) + '%';
      column.style.animationDelay = Math.random() * 5 + 's';
      column.style.animationDuration = (Math.random() * 5 + 8) + 's';
      let text = '';
      for (let j = 0; j < 20; j++) {
        text += String.fromCharCode(Math.random() * 94 + 33) + '<br>';
      }
      column.innerHTML = text;
      matrixContainer.appendChild(column);
    }

    // Generate stars
    const starfieldContainer = document.querySelector('.bg-starfield');
    for (let i = 0; i < 100; i++) {
      const star = document.createElement('div');
      star.className = 'star';
      star.style.left = Math.random() * 100 + '%';
      star.style.top = Math.random() * 100 + '%';
      star.style.animationDelay = Math.random() * 3 + 's';
      star.style.animationDuration = (Math.random() * 2 + 2) + 's';
      starfieldContainer.appendChild(star);
    }

    // Generate bubbles
    const bubblesContainer = document.querySelector('.bg-bubbles');
    for (let i = 0; i < 15; i++) {
      const bubble = document.createElement('div');
      bubble.className = 'bubble';
      const size = Math.random() * 80 + 40;
      bubble.style.width = size + 'px';
      bubble.style.height = size + 'px';
      bubble.style.left = Math.random() * 100 + '%';
      bubble.style.animationDelay = Math.random() * 5 + 's';
      bubble.style.animationDuration = (Math.random() * 5 + 8) + 's';
      bubblesContainer.appendChild(bubble);
    }

    // Generate mesh blobs
    const meshContainer = document.querySelector('.bg-mesh');
    const colors = ['rgba(255, 154, 139, 0.4)', 'rgba(255, 106, 136, 0.4)', 'rgba(255, 153, 172, 0.4)'];
    for (let i = 0; i < 5; i++) {
      const blob = document.createElement('div');
      blob.className = 'mesh-blob';
      const size = Math.random() * 300 + 200;
      blob.style.width = size + 'px';
      blob.style.height = size + 'px';
      blob.style.left = Math.random() * 100 + '%';
      blob.style.top = Math.random() * 100 + '%';
      blob.style.background = colors[i % colors.length];
      blob.style.animationDelay = Math.random() * 5 + 's';
      meshContainer.appendChild(blob);
    }

    // Generate liquid shapes
    const liquidContainer = document.querySelector('.bg-liquid');
    for (let i = 0; i < 3; i++) {
      const shape = document.createElement('div');
      shape.className = 'liquid-shape';
      const size = Math.random() * 400 + 300;
      shape.style.width = size + 'px';
      shape.style.height = size + 'px';
      shape.style.left = Math.random() * 100 + '%';
      shape.style.top = Math.random() * 100 + '%';
      shape.style.animationDelay = (i * 3) + 's';
      liquidContainer.appendChild(shape);
    }