.loading-container{z-index:9999;background:linear-gradient(135deg,#667eea 0%,#764ba2 100%);justify-content:center;align-items:center;display:flex;position:fixed;top:0;bottom:0;left:0;right:0}.loading-content{text-align:center;color:#fff}.book-loader{margin-bottom:30px}.book{perspective:200px;width:80px;height:60px;transform-style:preserve-3d;margin:0 auto;position:relative}.book-page{background:#fff;border-radius:3px;width:40px;height:60px;position:absolute;box-shadow:0 2px 5px rgba(0,0,0,.2)}.book-page:first-child{animation:1.5s ease-in-out infinite pageFlip;left:0}.book-page:nth-child(2){animation:1.5s ease-in-out .2s infinite pageFlip;left:20px}.book-page:nth-child(3){animation:1.5s ease-in-out .4s infinite pageFlip;left:40px}@keyframes pageFlip{0%,to{background:#fff;transform:rotateY(0)}50%{background:#f3f4f6;transform:rotateY(-180deg)}}.loading-text{letter-spacing:2px;margin-bottom:20px;font-size:1.8rem;font-weight:500;animation:2s ease-in-out infinite fadeInOut}.loading-progress{max-width:300px;margin:20px auto}.progress-bar{background:rgba(255,255,255,.2);border-radius:10px;height:4px;overflow:hidden}.progress-fill{background:#fff;border-radius:10px;width:30%;height:100%;animation:1.5s ease-in-out infinite progress}@keyframes progress{0%{transform:translate(-100%)}50%{transform:translate(0%)}to{transform:translate(100%)}}.loading-subtitle{opacity:.8;font-size:1rem;animation:3s ease-in-out infinite fadeInOut}@keyframes fadeInOut{0%,to{opacity:.8}50%{opacity:1}}