CSS 3d portfolio animation | HTML, CSS & JavaScript

<div class="scene" id="scene">
    <div class="book" id="book">
      
      <div class="page" id="page-1">
        <div class="front cover">
          <h1>Nilesh Mhatre</h1>
          <p>Creative Developer & Designer</p>
          <div class="hint">Click to open book</div>
        </div>
        <div class="back">
          <h2 class="content-header">About Me</h2>
          <p class="text-box">
            Hello! I bridge the gap between design and engineering. I specialize in building highly interactive, accessible, and performant web applications.
          </p>
          <h2 class="content-header" style="font-size: 1.2rem;">Skills</h2>
          <p class="text-box">
            HTML5, CSS3, JavaScript (ES6+), React, Vue, Three.js, Node.js, UI/UX Design.
          </p>
          <span class="page-number">2</span>
        </div>
      </div>

<div class="page" id="page-2">
        <div class="front">
          <h2 class="content-header">My Projects</h2>
          
          <div class="project-card">
            <h3>E-Commerce App</h3>
            <p class="text-box">A full-stack React & Node.js store with Stripe integration.</p>
          </div>
          
          <div class="project-card">
            <h3>3D WebGL Engine</h3>
            <p class="text-box">Interactive browser rendering using Three.js and WebGL.</p>
          </div>

<span class="page-number">3</span>
        </div>
        <div class="back">
          <h2 class="content-header">Experience</h2>
          <p class="text-box"><strong>Senior Frontend Developer</strong><br>TechCorp Inc. (2021 - Present)</p>
          <p class="text-box"><strong>Web Designer</strong><br>Creative Studio (2018 - 2021)</p>
          
          <p class="text-box" style="margin-top: auto; text-align: center; color: var(--primary-color);">
            <em>Click anywhere to turn page</em>
          </p>
          <span class="page-number">4</span>
        </div>
      </div>

<div class="page" id="page-3">
        <div class="front">
          <h2 class="content-header">Let's Connect</h2>
          <p class="text-box">I'm currently available for freelance work and full-time opportunities.</p>
          
          <div class="project-card">
            <h3>Email Me</h3>
            <p class="text-box" style="margin-bottom:0;">hello@creative-dev.com</p>
          </div>
          <div class="project-card">
            <h3>Follow Me</h3>
            <p class="text-box" style="margin-bottom:0;">GitHub / LinkedIn / Twitter</p>
          </div>
          
          <a href="#" class="btn" style="margin-top: 1rem;">Download Resume</a>
          <span class="page-number">5</span>
        </div>
        <div class="back cover">
          <h1>Thank You</h1>
          <p>For exploring my portfolio.</p>
        </div>
      </div>

</div>
  </div>

:root {
      --primary-color: #6c5ce7;
      --text-dark: #2d3436;
      --text-light: #636e72;
      --bg-color: #dfe6e9;
      --page-bg: #f5f6fa;
      --cover-bg: linear-gradient(135deg, #6c5ce7, #a29bfe);
      --spine-shadow: linear-gradient(90deg, rgba(0,0,0,0.15) 0%, rgba(0,0,0,0) 10%);
    }

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

body {
      display: flex;
      justify-content: center;
      align-items: center;
      min-height: 100vh;
      background-color: var(--bg-color);
      overflow: hidden;
      scale:.5;
    }

/* --- 3D Scene Setup --- */
    .scene {
      width: 100vw;
      height: 100vh;
      display: flex;
      justify-content: center;
      align-items: center;
      perspective: 2000px;
    }

.book {
      position: relative;
      width: 400px;
      height: 550px;
      transform-style: preserve-3d;
      transition: transform 0.1s ease-out;
      transform: rotateX(10deg) rotateY(-10deg); 
      border-radius: 5px;
      box-shadow: 20px 20px 40px rgba(0, 0, 0, 0.2);
    }

/* --- Page Mechanics --- */
    .page {
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      transform-origin: left center;
      transform-style: preserve-3d;
      transition: transform 1.2s cubic-bezier(0.645, 0.045, 0.355, 1);
      cursor: pointer;
    }

.page.flipped {
      transform: rotateY(-180deg);
    }

/* --- Front & Back Surfaces --- */
    .front, .back {
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      backface-visibility: hidden;
      display: flex;
      flex-direction: column;
      padding: 3rem 2rem;
      background-color: var(--page-bg);
      border-radius: 0 12px 12px 0;
    }

.front::before, .back::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background: var(--spine-shadow);
      pointer-events: none;
      border-radius: inherit;
    }

.back {
      transform: rotateY(180deg);
      border-radius: 12px 0 0 12px;
      background-image: linear-gradient(-90deg, rgba(0,0,0,0.05) 0%, rgba(0,0,0,0) 10%);
    }

.page:not(.flipped):hover {
      transform: rotateY(-4deg);
      box-shadow: 5px 5px 15px rgba(0,0,0,0.1);
    }
    
    .page.flipped:hover {
      transform: rotateY(-176deg);
    }

/* --- UI Content Design --- */
    .cover {
      background: var(--cover-bg);
      color: white;
      justify-content: center;
      align-items: center;
      text-align: center;
      border: none;
    }

.cover h1 {
      font-size: 2.5rem;
      margin-bottom: 0.5rem;
      text-shadow: 2px 2px 10px rgba(0,0,0,0.2);
    }

.cover p {
      font-weight: 300;
      opacity: 0.9;
    }

.hint {
      margin-top: 3rem;
      font-size: 0.9rem;
      background: rgba(255, 255, 255, 0.2);
      padding: 8px 16px;
      border-radius: 20px;
      backdrop-filter: blur(5px);
      animation: pulse 2s infinite;
    }

@keyframes pulse {
      0% { transform: scale(1); }
      50% { transform: scale(1.05); }
      100% { transform: scale(1); }
    }

.content-header {
      color: var(--primary-color);
      font-size: 1.8rem;
      margin-bottom: 1.5rem;
      border-bottom: 2px solid rgba(108, 92, 231, 0.2);
      padding-bottom: 0.5rem;
    }

.text-box {
      color: var(--text-light);
      line-height: 1.6;
      margin-bottom: 1.5rem;
      font-size: 0.95rem;
    }

.project-card {
      background: white;
      padding: 1rem;
      border-radius: 8px;
      box-shadow: 0 4px 10px rgba(0,0,0,0.05);
      margin-bottom: 1rem;
      transition: transform 0.3s;
    }
    
    .project-card:hover {
      transform: translateY(-5px);
    }
    
    .project-card h3 {
      color: var(--text-dark);
      font-size: 1.1rem;
      margin-bottom: 0.3rem;
    }
    
    .btn {
      display: inline-block;
      padding: 10px 20px;
      background: var(--primary-color);
      color: white;
      text-decoration: none;
      border-radius: 5px;
      font-size: 0.9rem;
      font-weight: 600;
      margin-top: auto;
      text-align: center;
    }

.page-number {
      position: absolute;
      bottom: 20px;
      right: 20px;
      font-size: 0.8rem;
      color: #aaa;
    }
    
    .back .page-number {
      left: 20px;
      right: auto;
    }

document.addEventListener('DOMContentLoaded', () => {
      const pages = document.querySelectorAll('.page');
      const book = document.getElementById('book');
      const scene = document.getElementById('scene');
      
      // 1. Z-Index Management (Ensures Cover is on top initially)
      pages.forEach((page, index) => {
        // Page 1 gets highest z-index, Page 3 gets lowest
        page.style.zIndex = pages.length - index;
      });

// 2. Click to Flip Logic
      pages.forEach((page, index) => {
        page.addEventListener('click', () => {
          if (page.classList.contains('flipped')) {
            // Turning backward (Right to Left)
            page.classList.remove('flipped');
            setTimeout(() => {
              // Restore its z-index so it sits back on top of the right stack
              page.style.zIndex = pages.length - index;
            }, 600); // Trigger mid-animation
          } else {
            // Turning forward (Left to Right)
            page.classList.add('flipped');
            // Change z-index immediately so it stacks properly on the left side
            page.style.zIndex = index + 1;
          }
        });
      });

// 3. Interactive Mouse Parallax Effect
      scene.addEventListener('mousemove', (e) => {
        const xAxis = (window.innerWidth / 2 - e.pageX) / 30; 
        const yAxis = (window.innerHeight / 2 - e.pageY) / 30;
        book.style.transform = `rotateY(${xAxis - 10}deg) rotateX(${yAxis + 10}deg)`;
      });

scene.addEventListener('mouseleave', () => {
        book.style.transform = `rotateX(10deg) rotateY(-10deg)`;
        book.style.transition = 'transform 0.5s ease-out';
      });
      
      scene.addEventListener('mouseenter', () => {
        book.style.transition = 'transform 0.1s ease-out';
      });
    });

- 3D Interactive Portfolio Book

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